RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy10189
(376 letters)
>gnl|CDD|199828 cd09941, SH2_Grb2_like, Src homology 2 domain found in Growth
factor receptor-bound protein 2 (Grb2) and similar
proteins. The adaptor proteins here include homologs
Grb2 in humans, Sex muscle abnormal protein 5 (Sem-5) in
Caenorhabditis elegans, and Downstream of receptor
kinase (drk) in Drosophila melanogaster. They are
composed of one SH2 and two SH3 domains. Grb2/Sem-5/drk
regulates the Ras pathway by linking the tyrosine
kinases to the Ras guanine nucleotide releasing protein
Sos, which converts Ras to the active GTP-bound state.
The SH2 domain of Grb2/Sem-5/drk binds class II
phosphotyrosyl peptides while its SH3 domain binds to
Sos and Sos-derived, proline-rich peptides. Besides it
function in Ras signaling, Grb2 is also thought to play
a role in apoptosis. Unlike most SH2 structures in which
the peptide binds in an extended conformation (such that
the +3 peptide residue occupies a hydrophobic pocket in
the protein, conferring a modest degree of selectivity),
Grb2 forms several hydrogen bonds via main chain atoms
with the side chain of +2 Asn. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 95
Score = 166 bits (422), Expect = 2e-51
Identities = 67/95 (70%), Positives = 81/95 (85%), Gaps = 1/95 (1%)
Query: 56 KNHDWYYGRITRADAERLLSN-KHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSS 114
K H W++G+I+RA+AE +L N + +GAFLIR SESSPGDFSLSVK + VQHFKVLRD +
Sbjct: 1 KPHPWFHGKISRAEAEEILMNQRPDGAFLIRESESSPGDFSLSVKFGNDVQHFKVLRDGA 60
Query: 115 GKFFLWVVKFNSLNELVEYHRTASVSRSQDVKLRD 149
GK+FLWVVKFNSLNELV+YHRT SVSR+Q + LRD
Sbjct: 61 GKYFLWVVKFNSLNELVDYHRTTSVSRNQQIFLRD 95
Score = 166 bits (422), Expect = 2e-51
Identities = 67/95 (70%), Positives = 81/95 (85%), Gaps = 1/95 (1%)
Query: 235 KNHDWYYGRITRADAERLLSN-KHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSS 293
K H W++G+I+RA+AE +L N + +GAFLIR SESSPGDFSLSVK + VQHFKVLRD +
Sbjct: 1 KPHPWFHGKISRAEAEEILMNQRPDGAFLIRESESSPGDFSLSVKFGNDVQHFKVLRDGA 60
Query: 294 GKFFLWVVKFNSLNELVEYHRTASVSRSQDVKLRD 328
GK+FLWVVKFNSLNELV+YHRT SVSR+Q + LRD
Sbjct: 61 GKYFLWVVKFNSLNELVDYHRTTSVSRNQQIFLRD 95
>gnl|CDD|212738 cd11804, SH3_GRB2_like_N, N-terminal Src homology 3 domain of
Growth factor receptor-bound protein 2 (GRB2) and
related proteins. This family includes the adaptor
protein GRB2 and related proteins including Drosophila
melanogaster Downstream of receptor kinase (DRK),
Caenorhabditis elegans Sex muscle abnormal protein 5
(Sem-5), GRB2-related adaptor protein (GRAP), GRAP2,
and similar proteins. Family members contain an
N-terminal SH3 domain, a central SH2 domain, and a
C-terminal SH3 domain. GRB2/Sem-5/DRK is a critical
signaling molecule that regulates the Ras pathway by
linking tyrosine kinases to the Ras guanine nucleotide
releasing protein Sos (son of sevenless), which
converts Ras to the active GTP-bound state. GRAP2 plays
an important role in T cell receptor (TCR) signaling by
promoting the formation of the SLP-76:LAT complex,
which couples the TCR to the Ras pathway. GRAP acts as
a negative regulator of T cell receptor (TCR)-induced
lymphocyte proliferation by downregulating the
signaling to the Ras/ERK pathway. The N-terminal SH3
domain of GRB2 binds to Sos and Sos-derived
proline-rich peptides. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 52
Score = 110 bits (276), Expect = 2e-30
Identities = 42/52 (80%), Positives = 47/52 (90%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
EA+AKHDF ATAEDELSF+K +LK+LNMEDD NWY+AELDGKEGLIP NYI
Sbjct: 1 EAVAKHDFKATAEDELSFKKGSILKVLNMEDDPNWYKAELDGKEGLIPKNYI 52
Score = 71.6 bits (176), Expect = 3e-16
Identities = 30/74 (40%), Positives = 37/74 (50%), Gaps = 25/74 (33%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYRA 218
A +DF EL F++G ++ +LNMEDD NWY+A
Sbjct: 4 AKHDFKATAEDELSFKKGSILK-------------------------VLNMEDDPNWYKA 38
Query: 219 ELDGKEGLIPSNYI 232
ELDGKEGLIP NYI
Sbjct: 39 ELDGKEGLIPKNYI 52
>gnl|CDD|214585 smart00252, SH2, Src homology 2 domains. Src homology 2 domains
bind phosphotyrosine-containing polypeptides via 2
surface pockets. Specificity is provided via interaction
with residues that are distinct from the
phosphotyrosine. Only a single occurrence of a SH2
domain has been found in S. cerevisiae.
Length = 84
Score = 110 bits (278), Expect = 3e-30
Identities = 40/82 (48%), Positives = 58/82 (70%), Gaps = 1/82 (1%)
Query: 58 HDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 117
WY+G I+R +AE+LL N+ +G FL+R SESSPGD+ LSV+ V+H+++ R+ GKF
Sbjct: 1 QPWYHGFISREEAEKLLKNEGDGDFLVRDSESSPGDYVLSVRVKGKVKHYRIRRNEDGKF 60
Query: 118 FLW-VVKFNSLNELVEYHRTAS 138
+L KF SL ELVE+++ S
Sbjct: 61 YLEGGRKFPSLVELVEHYQKNS 82
Score = 110 bits (278), Expect = 3e-30
Identities = 40/82 (48%), Positives = 58/82 (70%), Gaps = 1/82 (1%)
Query: 237 HDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 296
WY+G I+R +AE+LL N+ +G FL+R SESSPGD+ LSV+ V+H+++ R+ GKF
Sbjct: 1 QPWYHGFISREEAEKLLKNEGDGDFLVRDSESSPGDYVLSVRVKGKVKHYRIRRNEDGKF 60
Query: 297 FLW-VVKFNSLNELVEYHRTAS 317
+L KF SL ELVE+++ S
Sbjct: 61 YLEGGRKFPSLVELVEHYQKNS 82
>gnl|CDD|215658 pfam00017, SH2, SH2 domain.
Length = 77
Score = 103 bits (258), Expect = 2e-27
Identities = 37/77 (48%), Positives = 56/77 (72%), Gaps = 2/77 (2%)
Query: 60 WYYGRITRADAERLLSN-KHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFF 118
WY+G+I+R +AERLL N K +G FL+R SES PGD++LSV+ V+H+++ +G ++
Sbjct: 1 WYHGKISREEAERLLLNPKPDGTFLVRESESKPGDYTLSVRDDGRVKHYRIQSLDNGGYY 60
Query: 119 L-WVVKFNSLNELVEYH 134
+ V FNSL ELVE++
Sbjct: 61 ISGGVTFNSLPELVEHY 77
Score = 103 bits (258), Expect = 2e-27
Identities = 37/77 (48%), Positives = 56/77 (72%), Gaps = 2/77 (2%)
Query: 239 WYYGRITRADAERLLSN-KHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFF 297
WY+G+I+R +AERLL N K +G FL+R SES PGD++LSV+ V+H+++ +G ++
Sbjct: 1 WYHGKISREEAERLLLNPKPDGTFLVRESESKPGDYTLSVRDDGRVKHYRIQSLDNGGYY 60
Query: 298 L-WVVKFNSLNELVEYH 313
+ V FNSL ELVE++
Sbjct: 61 ISGGVTFNSLPELVEHY 77
>gnl|CDD|212739 cd11805, SH3_GRB2_like_C, C-terminal Src homology 3 domain of
Growth factor receptor-bound protein 2 (GRB2) and
related proteins. This family includes the adaptor
protein GRB2 and related proteins including Drosophila
melanogaster Downstream of receptor kinase (DRK),
Caenorhabditis elegans Sex muscle abnormal protein 5
(Sem-5), GRB2-related adaptor protein (GRAP), GRAP2, and
similar proteins. Family members contain an N-terminal
SH3 domain, a central SH2 domain, and a C-terminal SH3
domain. GRB2/Sem-5/DRK is a critical signaling molecule
that regulates the Ras pathway by linking tyrosine
kinases to the Ras guanine nucleotide releasing protein
Sos (son of sevenless), which converts Ras to the active
GTP-bound state. GRAP2 plays an important role in T cell
receptor (TCR) signaling by promoting the formation of
the SLP-76:LAT complex, which couples the TCR to the Ras
pathway. GRAP acts as a negative regulator of T cell
receptor (TCR)-induced lymphocyte proliferation by
downregulating the signaling to the Ras/ERK pathway. The
C-terminal SH3 domains (SH3c) of GRB2 and GRAP2 have
been shown to bind to classical PxxP motif ligands, as
well as to non-classical motifs. GRB2 SH3c binds Gab2
(Grb2-associated binder 2) through epitopes containing
RxxK motifs, while the SH3c of GRAP2 binds to the
phosphatase-like protein HD-PTP via a RxxxxK motif. SH3
domains are protein interaction domains that typically
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 100 bits (251), Expect = 8e-27
Identities = 36/51 (70%), Positives = 40/51 (78%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
VQALYDF PQEPGELEFRRGD+ITV D SD WW GE+ R G+FPA Y+
Sbjct: 1 RVQALYDFNPQEPGELEFRRGDIITVLDSSDPDWWKGELRGRVGIFPANYV 51
Score = 49.9 bits (120), Expect = 2e-08
Identities = 18/50 (36%), Positives = 32/50 (64%), Gaps = 1/50 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A +DFN EL FR+ ++ +L+ D +W++ EL G+ G+ P+NY++
Sbjct: 4 ALYDFNPQEPGELEFRRGDIITVLD-SSDPDWWKGELRGRVGIFPANYVQ 52
Score = 46.9 bits (112), Expect = 2e-07
Identities = 18/20 (90%), Positives = 18/20 (90%)
Query: 335 LVQALYDFTPQEPGELEFRR 354
VQALYDF PQEPGELEFRR
Sbjct: 1 RVQALYDFNPQEPGELEFRR 20
>gnl|CDD|212879 cd11946, SH3_GRB2_N, N-terminal Src homology 3 domain of Growth
factor receptor-bound protein 2. GRB2 is a critical
signaling molecule that regulates the Ras pathway by
linking tyrosine kinases to the Ras guanine nucleotide
releasing protein Sos (son of sevenless), which
converts Ras to the active GTP-bound state. It is
ubiquitously expressed in all tissues throughout
development and is important in cell cycle progression,
motility, morphogenesis, and angiogenesis. In
lymphocytes, GRB2 is associated with antigen receptor
signaling components. GRB2 contains an N-terminal SH3
domain, a central SH2 domain, and a C-terminal SH3
domain. Its N-terminal SH3 domain binds to Sos and
Sos-derived proline-rich peptides. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 91.6 bits (227), Expect = 2e-23
Identities = 39/56 (69%), Positives = 48/56 (85%)
Query: 1 MEAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEMK 56
MEAIAK+DF ATA+DELSF++ +LK+LN E D NWY+AEL+GK+G IP NYIEMK
Sbjct: 1 MEAIAKYDFKATADDELSFKRGDILKVLNEECDQNWYKAELNGKDGFIPKNYIEMK 56
Score = 57.3 bits (138), Expect = 4e-11
Identities = 32/77 (41%), Positives = 38/77 (49%), Gaps = 25/77 (32%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYRA 218
A YDF EL F+RGD++ V LN E D NWY+A
Sbjct: 5 AKYDFKATADDELSFKRGDILKV-------------------------LNEECDQNWYKA 39
Query: 219 ELDGKEGLIPSNYIEMK 235
EL+GK+G IP NYIEMK
Sbjct: 40 ELNGKDGFIPKNYIEMK 56
>gnl|CDD|198173 cd00173, SH2, Src homology 2 (SH2) domain. In general, SH2 domains
are involved in signal transduction; they bind
pTyr-containing polypeptide ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites. They are present in a wide array
of proteins including: adaptor proteins (Nck1, Crk,
Grb2), scaffolds (Slp76, Shc, Dapp1), kinases (Src, Syk,
Fps, Tec), phosphatases (Shp-1, Shp-2), transcription
factors (STAT1), Ras signaling molecules (Ras-Gap),
ubiquitination factors (c-Cbl), cytoskeleton regulators
(Tensin), signal regulators (SAP), and phospholipid
second messengers (PLCgamma), amongst others.
Length = 79
Score = 91.7 bits (228), Expect = 3e-23
Identities = 36/79 (45%), Positives = 51/79 (64%), Gaps = 3/79 (3%)
Query: 59 DWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDG-VQHFKVLRDSSGKF 117
W++G I+R +AERLL K +G FL+R S S PGD+ LSV+ DG V+H+ + R+ G +
Sbjct: 1 PWFHGSISREEAERLLRGKPDGTFLVRESSSEPGDYVLSVRSGDGKVKHYLIERNEGGYY 60
Query: 118 FL--WVVKFNSLNELVEYH 134
L F SL ELVE++
Sbjct: 61 LLGGSGRTFPSLPELVEHY 79
Score = 91.7 bits (228), Expect = 3e-23
Identities = 36/79 (45%), Positives = 51/79 (64%), Gaps = 3/79 (3%)
Query: 238 DWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDG-VQHFKVLRDSSGKF 296
W++G I+R +AERLL K +G FL+R S S PGD+ LSV+ DG V+H+ + R+ G +
Sbjct: 1 PWFHGSISREEAERLLRGKPDGTFLVRESSSEPGDYVLSVRSGDGKVKHYLIERNEGGYY 60
Query: 297 FL--WVVKFNSLNELVEYH 313
L F SL ELVE++
Sbjct: 61 LLGGSGRTFPSLPELVEHY 79
>gnl|CDD|198189 cd09935, SH2_ABL, Src homology 2 (SH2) domain found in Abelson
murine lymphosarcoma virus (ABL) proteins. ABL-family
proteins are highly conserved tyrosine kinases. Each ABL
protein contains an SH3-SH2-TK (Src homology 3-Src
homology 2-tyrosine kinase) domain cassette, which
confers autoregulated kinase activity and is common
among nonreceptor tyrosine kinases. Several types of
posttranslational modifications control ABL catalytic
activity, subcellular localization, and stability, with
consequences for both cytoplasmic and nuclear ABL
functions. Binding partners provide additional
regulation of ABL catalytic activity, substrate
specificity, and downstream signaling. By combining this
cassette with actin-binding and -bundling domain, ABL
proteins are capable of connecting phosphoregulation
with actin-filament reorganization. Vertebrate paralogs,
ABL1 and ABL2, have evolved to perform specialized
functions. ABL1 includes nuclear localization signals
and a DNA binding domain which is used to mediate DNA
damage-repair functions, while ABL2 has additional
binding capacity for actin and for microtubules to
enhance its cytoskeletal remodeling functions. SH2 is
involved in several autoinhibitory mechanism that
constrain the enzymatic activity of the ABL-family
kinases. In one mechanism SH2 and SH3 cradle the kinase
domain while a cap sequence stabilizes the inactive
conformation resulting in a locked inactive state.
Another involves phosphatidylinositol 4,5-bisphosphate
(PIP2) which binds the SH2 domain through residues
normally required for phosphotyrosine binding in the
linker segment between the SH2 and kinase domains. The
SH2 domain contributes to ABL catalytic activity and
target site specificity. It is thought that the ABL
catalytic site and SH2 pocket have coevolved to
recognize the same sequences. Recent work now supports a
hierarchical processivity model in which the substrate
target site most compatible with ABL kinase domain
preferences is phosphorylated with greatest efficiency.
If this site is compatible with the ABL SH2 domain
specificity, it will then reposition and dock in the SH2
pocket. This mechanism also explains how ABL kinases
phosphorylates poor targets on the same substrate if
they are properly positioned and how relatively poor
substrate proteins might be recruited to ABL through a
complex with strong substrates that can also dock with
the SH2 pocket. In general SH2 domains are involved in
signal transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 94
Score = 83.6 bits (207), Expect = 5e-20
Identities = 36/82 (43%), Positives = 54/82 (65%), Gaps = 1/82 (1%)
Query: 58 HDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 117
H WY+G I+R AE LLS+ G+FL+R SESSPG +S+S++ V H+++ DS GK
Sbjct: 3 HSWYHGPISRNAAEYLLSSGINGSFLVRESESSPGQYSISLRYDGRVYHYRISEDSDGKV 62
Query: 118 FLWV-VKFNSLNELVEYHRTAS 138
++ +FN+L ELV +H +
Sbjct: 63 YVTQEHRFNTLAELVHHHSKNA 84
Score = 83.6 bits (207), Expect = 5e-20
Identities = 36/82 (43%), Positives = 54/82 (65%), Gaps = 1/82 (1%)
Query: 237 HDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 296
H WY+G I+R AE LLS+ G+FL+R SESSPG +S+S++ V H+++ DS GK
Sbjct: 3 HSWYHGPISRNAAEYLLSSGINGSFLVRESESSPGQYSISLRYDGRVYHYRISEDSDGKV 62
Query: 297 FLWV-VKFNSLNELVEYHRTAS 317
++ +FN+L ELV +H +
Sbjct: 63 YVTQEHRFNTLAELVHHHSKNA 84
>gnl|CDD|212881 cd11948, SH3_GRAP_N, N-terminal Src homology 3 domain of
GRB2-related adaptor protein. GRAP is a GRB-2 like
adaptor protein that is highly expressed in lymphoid
tissues. It acts as a negative regulator of T cell
receptor (TCR)-induced lymphocyte proliferation by
downregulating the signaling to the Ras/ERK pathway. It
has been identified as a regulator of TGFbeta signaling
in diabetic kidney tubules and may have a role in the
pathogenesis of the disease. GRAP contains an
N-terminal SH3 domain, a central SH2 domain, and a
C-terminal SH3 domain. The N-terminal SH3 domain of the
related protein GRB2 binds to Sos and Sos-derived
proline-rich peptides. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 54
Score = 80.6 bits (199), Expect = 2e-19
Identities = 34/54 (62%), Positives = 42/54 (77%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
EA+A + F AT DEL F+K +LKILNMEDD NWY+AEL G+EG IP NYI++
Sbjct: 1 EAVALYSFQATESDELPFQKGDILKILNMEDDQNWYKAELQGREGYIPKNYIKV 54
Score = 62.1 bits (151), Expect = 8e-13
Identities = 31/76 (40%), Positives = 39/76 (51%), Gaps = 25/76 (32%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYRA 218
ALY F E EL F++GD++ ILNMEDD NWY+A
Sbjct: 4 ALYSFQATESDELPFQKGDILK-------------------------ILNMEDDQNWYKA 38
Query: 219 ELDGKEGLIPSNYIEM 234
EL G+EG IP NYI++
Sbjct: 39 ELQGREGYIPKNYIKV 54
>gnl|CDD|212690 cd00174, SH3, Src Homology 3 domain superfamily. Src Homology 3
(SH3) domains are protein interaction domains that bind
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. Thus, they
are referred to as proline-recognition domains (PRDs).
SH3 domains are less selective and show more diverse
specificity compared to other PRDs. They have been shown
to bind peptide sequences that lack the PxxP motif;
examples include the PxxDY motif of Eps8 and the
RKxxYxxY sequence in SKAP55. SH3 domain containing
proteins play versatile and diverse roles in the cell,
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies, among others. Many members of this
superfamily are adaptor proteins that associate with a
number of protein partners, facilitating complex
formation and signal transduction.
Length = 51
Score = 79.0 bits (196), Expect = 7e-19
Identities = 26/50 (52%), Positives = 36/50 (72%), Gaps = 1/50 (2%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEI-GARKGLFPATY 205
+ALYD+ Q+ EL F++GD+ITV ++ D WW GE+ G R+GLFPA Y
Sbjct: 2 ARALYDYEAQDDDELSFKKGDIITVLEKDDDGWWEGELNGGREGLFPANY 51
Score = 62.5 bits (153), Expect = 6e-13
Identities = 23/51 (45%), Positives = 34/51 (66%), Gaps = 2/51 (3%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAEL-DGKEGLIPSNY 52
A A +D+ A +DELSF+K ++ +L +DD W+ EL G+EGL P+NY
Sbjct: 2 ARALYDYEAQDDDELSFKKGDIITVLEKDDD-GWWEGELNGGREGLFPANY 51
Score = 35.1 bits (82), Expect = 0.003
Identities = 8/20 (40%), Positives = 13/20 (65%)
Query: 336 VQALYDFTPQEPGELEFRRD 355
+ALYD+ Q+ EL F++
Sbjct: 2 ARALYDYEAQDDDELSFKKG 21
>gnl|CDD|199831 cd10369, SH2_Src_Frk, Src homology 2 (SH2) domain found in the
Fyn-related kinase (Frk). Frk is a member of the Src
non-receptor type tyrosine kinase family of proteins.
The Frk subfamily is composed of Frk/Rak and
Iyk/Bsk/Gst. It is expressed primarily epithelial cells.
Frk is a nuclear protein and may function during G1 and
S phase of the cell cycle and suppress growth. Unlike
the other Src members it lacks a glycine at position 2
of SH4 which is important for addition of a myristic
acid moiety that is involved in targeting Src PTKs to
cellular membranes. FRK and SHB exert similar effects
when overexpressed in rat phaeochromocytoma (PC12) and
beta-cells, where both induce PC12 cell differentiation
and beta-cell proliferation. Under conditions that cause
beta-cell degeneration these proteins augment beta-cell
apoptosis. The FRK-SHB responses involve FAK and insulin
receptor substrates (IRS) -1 and -2. Frk has been
demonstrated to interact with retinoblastoma protein.
Frk regulates PTEN protein stability by phosphorylating
PTEN, which in turn prevents PTEN degradation. Frk also
plays a role in regulation of embryonal pancreatic beta
cell formation. Frk has a unique N-terminal domain, an
SH3 domain, an SH2 domain, a kinase domain and a
regulatory tail, as do the other members of the family.
Like the other members of the Src family the SH2 domain
in addition to binding the target, also plays an
autoinhibitory role by binding to its activation loop.
The tryosine involved is at the same site as the
tyrosine involved in the autophosphorylation of Src. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 96
Score = 79.9 bits (197), Expect = 1e-18
Identities = 41/82 (50%), Positives = 52/82 (63%), Gaps = 3/82 (3%)
Query: 60 WYYGRITRADAER--LLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 117
W++G I RADAE+ L S GAFLIR SES G+FSLSV V+H+++ R G F
Sbjct: 5 WFFGAIKRADAEKQLLYSENQTGAFLIRESESQKGEFSLSVLDGGVVKHYRIRRLDEGGF 64
Query: 118 FLWVVK-FNSLNELVEYHRTAS 138
FL K F++LNE V Y+ T S
Sbjct: 65 FLTRRKTFSTLNEFVNYYTTTS 86
Score = 79.9 bits (197), Expect = 1e-18
Identities = 41/82 (50%), Positives = 52/82 (63%), Gaps = 3/82 (3%)
Query: 239 WYYGRITRADAER--LLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 296
W++G I RADAE+ L S GAFLIR SES G+FSLSV V+H+++ R G F
Sbjct: 5 WFFGAIKRADAEKQLLYSENQTGAFLIRESESQKGEFSLSVLDGGVVKHYRIRRLDEGGF 64
Query: 297 FLWVVK-FNSLNELVEYHRTAS 317
FL K F++LNE V Y+ T S
Sbjct: 65 FLTRRKTFSTLNEFVNYYTTTS 86
>gnl|CDD|199827 cd09933, SH2_Src_family, Src homology 2 (SH2) domain found in the
Src family of non-receptor tyrosine kinases. The Src
family kinases are nonreceptor tyrosine kinases that
have been implicated in pathways regulating
proliferation, angiogenesis, invasion and metastasis,
and bone metabolism. It is thought that transforming
ability of Src is linked to its ability to activate key
signaling molecules in these pathways, rather than
through direct activity. As such blocking Src activation
has been a target for drug companies. Src family members
can be divided into 3 groups based on their expression
pattern: 1) Src, Fyn, and Yes; 2) Blk, Fgr, Hck, Lck,
and Lyn; and 3) Frk-related kinases Frk/Rak and Iyk/Bsk
Of these, cellular c-Src is the best studied and most
frequently implicated in oncogenesis. The c-Src contains
five distinct regions: a unique N-terminal domain, an
SH3 domain, an SH2 domain, a kinase domain and a
regulatory tail, as do the other members of the family.
Src exists in both active and inactive conformations.
Negative regulation occurs through phosphorylation of
Tyr, resulting in an intramolecular association between
phosphorylated Tyr and the SH2 domain of SRC, which
locks the protein in a closed conformation. Further
stabilization of the inactive state occurs through
interactions between the SH3 domain and a proline-rich
stretch of residues within the kinase domain.
Conversely, dephosphorylation of Tyr allows SRC to
assume an open conformation. Full activity requires
additional autophosphorylation of a Tyr residue within
the catalytic domain. Loss of the negative-regulatory
C-terminal segment has been shown to result in increased
activity and transforming potential. Phosphorylation of
the C-terminal Tyr residue by C-terminal Src kinase
(Csk) and Csk homology kinase results in increased
intramolecular interactions and consequent Src
inactivation. Specific phosphatases, protein tyrosine
phosphatase a (PTPa) and the SH-containing phosphatases
SHP1/SHP2, have also been shown to take a part in Src
activation. Src is also activated by direct binding of
focal adhesion kinase (Fak) and Crk-associated substrate
(Cas) to the SH2 domain. SRC activity can also be
regulated by numerous receptor tyrosine kinases (RTKs),
such as Her2, epidermal growth factor receptor (EGFR),
fibroblast growth factor receptor, platelet-derived
growth factor receptor (PDGFR), and vascular endothelial
growth factor receptor (VEGFR). In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 79.5 bits (197), Expect = 1e-18
Identities = 33/89 (37%), Positives = 54/89 (60%), Gaps = 10/89 (11%)
Query: 59 DWYYGRITRADAERLL---SNKHEGAFLIRVSESSPGDFSLSVKCSD-----GVQHFKVL 110
+W++G+I R DAE+LL N G FLIR SE++PG +SLSV+ D V+H+++
Sbjct: 4 EWFFGKIKRKDAEKLLLAPGNPR-GTFLIRESETTPGAYSLSVRDGDDARGDTVKHYRIR 62
Query: 111 R-DSSGKFFLWVVKFNSLNELVEYHRTAS 138
+ D+ G + F +L ELV+++ +
Sbjct: 63 KLDNGGYYITTRATFPTLQELVQHYSKDA 91
Score = 79.5 bits (197), Expect = 1e-18
Identities = 33/89 (37%), Positives = 54/89 (60%), Gaps = 10/89 (11%)
Query: 238 DWYYGRITRADAERLL---SNKHEGAFLIRVSESSPGDFSLSVKCSD-----GVQHFKVL 289
+W++G+I R DAE+LL N G FLIR SE++PG +SLSV+ D V+H+++
Sbjct: 4 EWFFGKIKRKDAEKLLLAPGNPR-GTFLIRESETTPGAYSLSVRDGDDARGDTVKHYRIR 62
Query: 290 R-DSSGKFFLWVVKFNSLNELVEYHRTAS 317
+ D+ G + F +L ELV+++ +
Sbjct: 63 KLDNGGYYITTRATFPTLQELVQHYSKDA 91
>gnl|CDD|214620 smart00326, SH3, Src homology 3 domains. Src homology 3 (SH3)
domains bind to target proteins through sequences
containing proline and hydrophobic amino acids.
Pro-containing polypeptides may bind to SH3 domains in 2
different binding orientations.
Length = 56
Score = 76.4 bits (189), Expect = 6e-18
Identities = 28/55 (50%), Positives = 41/55 (74%), Gaps = 1/55 (1%)
Query: 153 EECLVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGA-RKGLFPATYI 206
E V+ALYD+T Q+P EL F++GD+ITV ++SD WW G +G ++GLFP+ Y+
Sbjct: 1 EGPQVRALYDYTAQDPDELSFKKGDIITVLEKSDDGWWKGRLGRGKEGLFPSNYV 55
Score = 65.3 bits (160), Expect = 7e-14
Identities = 24/53 (45%), Positives = 33/53 (62%), Gaps = 2/53 (3%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAEL-DGKEGLIPSNYIE 54
A +D+ A DELSF+K ++ +L DD W++ L GKEGL PSNY+E
Sbjct: 5 VRALYDYTAQDPDELSFKKGDIITVLEKSDD-GWWKGRLGRGKEGLFPSNYVE 56
Score = 35.6 bits (83), Expect = 0.002
Identities = 12/24 (50%), Positives = 17/24 (70%)
Query: 332 EECLVQALYDFTPQEPGELEFRRD 355
E V+ALYD+T Q+P EL F++
Sbjct: 1 EGPQVRALYDYTAQDPDELSFKKG 24
>gnl|CDD|198217 cd10354, SH2_Cterm_RasGAP, C-terminal Src homology 2 (SH2) domain
found in Ras GTPase-activating protein 1 (GAP). RasGAP
is part of the GAP1 family of GTPase-activating
proteins. The protein is located in the cytoplasm and
stimulates the GTPase activity of normal RAS p21, but
not its oncogenic counterpart. Acting as a suppressor of
RAS function, the protein enhances the weak intrinsic
GTPase activity of RAS proteins resulting in RAS
inactivation, thereby allowing control of cellular
proliferation and differentiation. Mutations leading to
changes in the binding sites of either protein are
associated with basal cell carcinomas. Alternative
splicing results in two isoforms. The shorter isoform
which lacks the N-terminal hydrophobic region, has the
same activity, and is expressed in placental tissues.
In general longer isoform contains 2 SH2 domains, a SH3
domain, a pleckstrin homology (PH) domain, and a
calcium-dependent phospholipid-binding C2 domain. The
C-terminus contains the catalytic domain of RasGap which
catalyzes the activation of Ras by hydrolyzing GTP-bound
active Ras into an inactive GDP-bound form of Ras. This
model contains the C-terminal SH2 domain. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 77
Score = 76.7 bits (189), Expect = 1e-17
Identities = 25/76 (32%), Positives = 54/76 (71%), Gaps = 1/76 (1%)
Query: 60 WYYGRITRADAERLL-SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFF 118
W++G+I+R +A +L G+FL+R S+++PGD+SLS + ++G++HFK++ + +F
Sbjct: 2 WFHGKISREEAYNMLVKVGGPGSFLVRESDNTPGDYSLSFRVNEGIKHFKIIPTGNNQFM 61
Query: 119 LWVVKFNSLNELVEYH 134
+ F+SL+++++ +
Sbjct: 62 MGGRYFSSLDDVIDRY 77
Score = 76.7 bits (189), Expect = 1e-17
Identities = 25/76 (32%), Positives = 54/76 (71%), Gaps = 1/76 (1%)
Query: 239 WYYGRITRADAERLL-SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFF 297
W++G+I+R +A +L G+FL+R S+++PGD+SLS + ++G++HFK++ + +F
Sbjct: 2 WFHGKISREEAYNMLVKVGGPGSFLVRESDNTPGDYSLSFRVNEGIKHFKIIPTGNNQFM 61
Query: 298 LWVVKFNSLNELVEYH 313
+ F+SL+++++ +
Sbjct: 62 MGGRYFSSLDDVIDRY 77
>gnl|CDD|212882 cd11949, SH3_GRB2_C, C-terminal Src homology 3 domain of Growth
factor receptor-bound protein 2. GRB2 is a critical
signaling molecule that regulates the Ras pathway by
linking tyrosine kinases to the Ras guanine nucleotide
releasing protein Sos (son of sevenless), which converts
Ras to the active GTP-bound state. It is ubiquitously
expressed in all tissues throughout development and is
important in cell cycle progression, motility,
morphogenesis, and angiogenesis. In lymphocytes, GRB2 is
associated with antigen receptor signaling components.
GRB2 contains an N-terminal SH3 domain, a central SH2
domain, and a C-terminal SH3 domain. The C-terminal SH3
domain of GRB2 binds to Gab2 (Grb2-associated binder 2)
through epitopes containing RxxK motifs, as well as to
the proline-rich C-terminus of FGRF2. SH3 domains are
protein interaction domains that typically bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 75.6 bits (186), Expect = 1e-17
Identities = 29/50 (58%), Positives = 34/50 (68%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
VQAL+DF PQE GEL FRRGD I V D SD +WW G + G+FP Y+
Sbjct: 2 VQALFDFDPQEDGELGFRRGDFIEVMDNSDPNWWKGACHGQTGMFPRNYV 51
Score = 43.7 bits (103), Expect = 3e-06
Identities = 15/50 (30%), Positives = 28/50 (56%), Gaps = 1/50 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A DF+ + EL FR+ +++++ D NW++ G+ G+ P NY+
Sbjct: 4 ALFDFDPQEDGELGFRRGDFIEVMD-NSDPNWWKGACHGQTGMFPRNYVT 52
Score = 40.2 bits (94), Expect = 4e-05
Identities = 15/19 (78%), Positives = 16/19 (84%)
Query: 336 VQALYDFTPQEPGELEFRR 354
VQAL+DF PQE GEL FRR
Sbjct: 2 VQALFDFDPQEDGELGFRR 20
>gnl|CDD|198196 cd09943, SH2_Nck_family, Src homology 2 (SH2) domain found in the
Nck family. Nck proteins are adaptors that modulate
actin cytoskeleton dynamics by linking proline-rich
effector molecules to tyrosine kinases or phosphorylated
signaling intermediates. There are two members known in
this family: Nck1 (Nckalpha) and Nck2 (Nckbeta and
Growth factor receptor-bound protein 4 (Grb4)). They
are characterized by having 3 SH3 domains and a
C-terminal SH2 domain. Nck1 and Nck2 have overlapping
functions as determined by gene knockouts. Both bind
receptor tyrosine kinases and other
tyrosine-phosphorylated proteins through their SH2
domains. In addition they also bind distinct targets.
Neuronal signaling proteins: EphrinB1, EphrinB2, and
Disabled-1 (Dab-1) all bind to Nck-2 exclusively. And in
the case of PDGFR, Tyr(P)751 binds to Nck1 while
Tyr(P)1009 binds to Nck2. Nck1 and Nck2 have a role in
the infection process of enteropathogenic Escherichia
coli (EPEC). Their SH3 domains are involved in
recruiting and activating the N-WASP/Arp2/3 complex
inducing actin polymerization resulting in the
production of pedestals, dynamic bacteria-presenting
protrusions of the plasma membrane. A similar thing
occurs in the vaccinia virus where motile plasma
membrane projections are formed beneath the virus.
Recently it has been shown that the SH2 domains of both
Nck1 and Nck2 bind the G-protein coupled receptor
kinase-interacting protein 1 (GIT1) in a
phosphorylation-dependent manner. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 93
Score = 75.6 bits (186), Expect = 4e-17
Identities = 40/90 (44%), Positives = 58/90 (64%), Gaps = 2/90 (2%)
Query: 60 WYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFF 118
WYYGRITR AE LL+ HEG FLIR SES+PGD+S+S+K +HFKV +
Sbjct: 3 WYYGRITRHQAETLLNEHGHEGDFLIRDSESNPGDYSVSLKAPGRNKHFKVQVV-DNVYC 61
Query: 119 LWVVKFNSLNELVEYHRTASVSRSQDVKLR 148
+ KF++++ELVE+++ A + S+ +
Sbjct: 62 IGQRKFHTMDELVEHYKKAPIFTSEQGEKL 91
Score = 75.6 bits (186), Expect = 4e-17
Identities = 40/90 (44%), Positives = 58/90 (64%), Gaps = 2/90 (2%)
Query: 239 WYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFF 297
WYYGRITR AE LL+ HEG FLIR SES+PGD+S+S+K +HFKV +
Sbjct: 3 WYYGRITRHQAETLLNEHGHEGDFLIRDSESNPGDYSVSLKAPGRNKHFKVQVV-DNVYC 61
Query: 298 LWVVKFNSLNELVEYHRTASVSRSQDVKLR 327
+ KF++++ELVE+++ A + S+ +
Sbjct: 62 IGQRKFHTMDELVEHYKKAPIFTSEQGEKL 91
>gnl|CDD|198198 cd09945, SH2_SHB_SHD_SHE_SHF_like, Src homology 2 domain found in
SH2 domain-containing adapter proteins B, D, E, and F
(SHB, SHD, SHE, SHF). SHB, SHD, SHE, and SHF are SH2
domain-containing proteins that play various roles
throughout the cell. SHB functions in generating
signaling compounds in response to tyrosine kinase
activation. SHB contains proline-rich motifs, a
phosphotyrosine binding (PTB) domain, tyrosine
phosphorylation sites, and a SH2 domain. SHB mediates
certain aspects of platelet-derived growth factor (PDGF)
receptor-, fibroblast growth factor (FGF) receptor-,
neural growth factor (NGF) receptor TRKA-, T cell
receptor-, interleukin-2 (IL-2) receptor- and focal
adhesion kinase- (FAK) signaling. SRC-like FYN-Related
Kinase FRK/RAK (also named BSK/IYK or GTK) and SHB
regulate apoptosis, proliferation and differentiation.
SHB promotes apoptosis and is also required for proper
mitogenicity, spreading and tubular morphogenesis in
endothelial cells. SHB also plays a role in preventing
early cavitation of embryoid bodies and reduces
differentiation to cells expressing albumin, amylase,
insulin and glucagon. SHB is a multifunctional protein
that has difference responses in different cells under
various conditions. SHE is expressed in heart, lung,
brain, and skeletal muscle, while expression of SHD is
restricted to the brain. SHF is mainly expressed in
skeletal muscle, brain, liver, prostate, testis, ovary,
small intestine, and colon. SHD may be a physiological
substrate of c-Abl and may function as an adapter
protein in the central nervous system. It is also
thought to be involved in apoptotic regulation. SHD
contains five YXXP motifs, a substrate sequence
preferred by Abl tyrosine kinases, in addition to a
poly-proline rich region and a C-terminal SH2 domain.
SHE contains two pTry protein binding domains, protein
interaction domain (PID) and a SH2 domain, followed by a
glycine-proline rich region, all of which are N-terminal
to the phosphotyrosine binding (PTB) domain. SHF
contains four putative tyrosine phosphorylation sites
and an SH2 domain. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 98
Score = 74.8 bits (184), Expect = 9e-17
Identities = 29/80 (36%), Positives = 51/80 (63%), Gaps = 2/80 (2%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
WY+G ITR +AE LL EG++L+R SES+ D+SLS+K + G H ++ R+ +G++ L
Sbjct: 3 WYHGAITRIEAESLLRPCKEGSYLVRNSESTKQDYSLSLKSAKGFMHMRIQRNETGQYIL 62
Query: 120 --WVVKFNSLNELVEYHRTA 137
+ F ++ E++ ++
Sbjct: 63 GQFSRPFETIPEMIRHYCLN 82
Score = 74.8 bits (184), Expect = 9e-17
Identities = 29/80 (36%), Positives = 51/80 (63%), Gaps = 2/80 (2%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
WY+G ITR +AE LL EG++L+R SES+ D+SLS+K + G H ++ R+ +G++ L
Sbjct: 3 WYHGAITRIEAESLLRPCKEGSYLVRNSESTKQDYSLSLKSAKGFMHMRIQRNETGQYIL 62
Query: 299 --WVVKFNSLNELVEYHRTA 316
+ F ++ E++ ++
Sbjct: 63 GQFSRPFETIPEMIRHYCLN 82
>gnl|CDD|212884 cd11951, SH3_GRAP_C, C-terminal Src homology 3 domain of
GRB2-related adaptor protein. GRAP is a GRB-2 like
adaptor protein that is highly expressed in lymphoid
tissues. It acts as a negative regulator of T cell
receptor (TCR)-induced lymphocyte proliferation by
downregulating the signaling to the Ras/ERK pathway. It
has been identified as a regulator of TGFbeta signaling
in diabetic kidney tubules and may have a role in the
pathogenesis of the disease. GRAP contains an N-terminal
SH3 domain, a central SH2 domain, and a C-terminal SH3
domain. The C-terminal SH3 domains (SH3c) of the related
proteins, GRB2 and GRAP2, have been shown to bind to
classical PxxP motif ligands, as well as to
non-classical motifs. GRB2 SH3c binds Gab2
(Grb2-associated binder 2) through epitopes containing
RxxK motifs, while the SH3c of GRAP2 binds to the
phosphatase-like protein HD-PTP via a RxxxxK motif. SH3
domains are protein interaction domains that typically
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 73.3 bits (180), Expect = 9e-17
Identities = 26/50 (52%), Positives = 33/50 (66%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
VQA YDF+ ++P +L FRRGD+I V D D +WW G I R G FP Y+
Sbjct: 2 VQAQYDFSAEDPSQLSFRRGDIIEVLDCPDPNWWRGRISGRVGFFPRNYV 51
Score = 41.3 bits (97), Expect = 2e-05
Identities = 18/49 (36%), Positives = 32/49 (65%), Gaps = 1/49 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
A++DF+A +LSFR+ ++++L+ D NW+R + G+ G P NY+
Sbjct: 4 AQYDFSAEDPSQLSFRRGDIIEVLDCPDP-NWWRGRISGRVGFFPRNYV 51
Score = 31.7 bits (72), Expect = 0.049
Identities = 11/19 (57%), Positives = 15/19 (78%)
Query: 336 VQALYDFTPQEPGELEFRR 354
VQA YDF+ ++P +L FRR
Sbjct: 2 VQAQYDFSAEDPSQLSFRR 20
>gnl|CDD|198224 cd10361, SH2_Fps_family, Src homology 2 (SH2) domain found in
feline sarcoma, Fujinami poultry sarcoma, and
fes-related (Fes/Fps/Fer) proteins. The Fps family
consists of members Fps/Fes and Fer/Flk/Tyk3. They are
cytoplasmic protein-tyrosine kinases implicated in
signaling downstream from cytokines, growth factors and
immune receptors. Fes/Fps/Fer contains three
coiled-coil regions, an SH2 (Src-homology-2) and a TK
(tyrosine kinase catalytic) domain signature. Members
here include: Fps/Fes, Fer, Kin-31, and In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 90
Score = 72.2 bits (178), Expect = 5e-16
Identities = 30/86 (34%), Positives = 52/86 (60%), Gaps = 5/86 (5%)
Query: 54 EMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGD---FSLSVKCSDGVQHFKVL 110
+++N +Y+G + R DAE LL K++G FL+R +E G LSV+ ++HF +
Sbjct: 2 DLENEPYYHGLLPREDAEELL--KNDGDFLVRKTEPKGGGKRKLVLSVRWDGKIRHFVIN 59
Query: 111 RDSSGKFFLWVVKFNSLNELVEYHRT 136
RD GK+++ F S++EL+ Y++
Sbjct: 60 RDDGGKYYIEGKSFKSISELINYYQK 85
Score = 72.2 bits (178), Expect = 5e-16
Identities = 30/86 (34%), Positives = 52/86 (60%), Gaps = 5/86 (5%)
Query: 233 EMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGD---FSLSVKCSDGVQHFKVL 289
+++N +Y+G + R DAE LL K++G FL+R +E G LSV+ ++HF +
Sbjct: 2 DLENEPYYHGLLPREDAEELL--KNDGDFLVRKTEPKGGGKRKLVLSVRWDGKIRHFVIN 59
Query: 290 RDSSGKFFLWVVKFNSLNELVEYHRT 315
RD GK+++ F S++EL+ Y++
Sbjct: 60 RDDGGKYYIEGKSFKSISELINYYQK 85
>gnl|CDD|212880 cd11947, SH3_GRAP2_N, N-terminal Src homology 3 domain of
GRB2-related adaptor protein 2. GRAP2 is also called
GADS (GRB2-related adapter downstream of Shc), GrpL,
GRB2L, Mona, or GRID (Grb2-related protein with insert
domain). It is expressed specifically in the
hematopoietic system. It plays an important role in T
cell receptor (TCR) signaling by promoting the
formation of the SLP-76:LAT complex, which couples the
TCR to the Ras pathway. It also have roles in
antigen-receptor and tyrosine kinase mediated
signaling. GRAP2 is unique from other GRB2-like adaptor
proteins in that it can be regulated by caspase
cleavage. It contains an N-terminal SH3 domain, a
central SH2 domain, and a C-terminal SH3 domain. The
N-terminal SH3 domain of the related protein GRB2 binds
to Sos and Sos-derived proline-rich peptides. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 71.0 bits (174), Expect = 6e-16
Identities = 28/54 (51%), Positives = 41/54 (75%), Gaps = 2/54 (3%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
EA K DF A+ EDELSF+K VLKIL+ +D W++AEL+G+EG +P N++++
Sbjct: 1 EARGKFDFTASGEDELSFKKGDVLKILSSDDI--WFKAELNGEEGYVPKNFVDI 52
Score = 43.2 bits (102), Expect = 5e-06
Identities = 19/77 (24%), Positives = 35/77 (45%), Gaps = 27/77 (35%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYR 217
+ +DFT EL F++GDV+ + + D W++
Sbjct: 3 RGKFDFTASGEDELSFKKGDVLKI---------------------------LSSDDIWFK 35
Query: 218 AELDGKEGLIPSNYIEM 234
AEL+G+EG +P N++++
Sbjct: 36 AELNGEEGYVPKNFVDI 52
>gnl|CDD|212775 cd11841, SH3_SH3YL1_like, Src homology 3 domain of SH3 domain
containing Ysc84-like 1 (SH3YL1) protein. SH3YL1
localizes to the plasma membrane and is required for
dorsal ruffle formation. It binds phosphoinositides
(PIs) with high affinity through its N-terminal SYLF
domain (also called DUF500). In addition, SH3YL1
contains a C-terminal SH3 domain which has been reported
to bind to N-WASP, dynamin 2, and SHIP2 (a PI
5-phosphatase). SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 70.5 bits (173), Expect = 9e-16
Identities = 25/52 (48%), Positives = 32/52 (61%), Gaps = 2/52 (3%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQH--WWHGEIGARKGLFPATYI 206
V ALY F Q+P +L F+ GD ITV R+D WW G + R G+FPA Y+
Sbjct: 2 VTALYSFEGQQPCDLSFQAGDRITVLTRTDSQFDWWEGRLRGRVGIFPANYV 53
Score = 42.4 bits (100), Expect = 8e-06
Identities = 15/53 (28%), Positives = 25/53 (47%), Gaps = 1/53 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMN-WYRAELDGKEGLIPSNYI 53
E A + F +LSF+ + +L D W+ L G+ G+ P+NY+
Sbjct: 1 EVTALYSFEGQQPCDLSFQAGDRITVLTRTDSQFDWWEGRLRGRVGIFPANYV 53
Score = 30.1 bits (68), Expect = 0.21
Identities = 10/24 (41%), Positives = 14/24 (58%)
Query: 336 VQALYDFTPQEPGELEFRRDLKIK 359
V ALY F Q+P +L F+ +I
Sbjct: 2 VTALYSFEGQQPCDLSFQAGDRIT 25
>gnl|CDD|212720 cd11786, SH3_SH3RF_1, First Src Homology 3 domain of SH3 domain
containing ring finger proteins. This model represents
the first SH3 domain of SH3RF1 (or POSH), SH3RF2 (or
POSHER), SH3RF3 (POSH2), and similar domains. Members of
this family are scaffold proteins that function as E3
ubiquitin-protein ligases. They all contain an
N-terminal RING finger domain and multiple SH3 domains;
SH3RF1 and SH3RF3 have four SH3 domains while SH3RF2 has
three. SH3RF1 plays a role in calcium homeostasis
through the control of the ubiquitin domain protein
Herp. It may also have a role in regulating death
receptor mediated and JNK mediated apoptosis. SH3RF3
interacts with p21-activated kinase 2 (PAK2) and
GTP-loaded Rac1. It may play a role in regulating JNK
mediated apoptosis in certain conditions. SH3RF2 acts as
an anti-apoptotic regulator of the JNK pathway by
binding to and promoting the degradation of SH3RF1. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 70.5 bits (173), Expect = 1e-15
Identities = 22/49 (44%), Positives = 38/49 (77%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ALY++ +EPG+L F++GD+I + R D++W+HGE ++G FPA+Y+
Sbjct: 3 KALYNYEGKEPGDLSFKKGDIILLRKRIDENWYHGECNGKQGFFPASYV 51
Score = 44.7 bits (106), Expect = 1e-06
Identities = 17/52 (32%), Positives = 31/52 (59%), Gaps = 1/52 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A A +++ +LSF+K ++ +L D NWY E +GK+G P++Y++
Sbjct: 2 AKALYNYEGKEPGDLSFKKGDII-LLRKRIDENWYHGECNGKQGFFPASYVQ 52
Score = 31.6 bits (72), Expect = 0.050
Identities = 10/27 (37%), Positives = 21/27 (77%), Gaps = 1/27 (3%)
Query: 337 QALYDFTPQEPGELEFRR-DLKIKRRK 362
+ALY++ +EPG+L F++ D+ + R++
Sbjct: 3 KALYNYEGKEPGDLSFKKGDIILLRKR 29
>gnl|CDD|198271 cd10408, SH2_Nck1, Src homology 2 (SH2) domain found in Nck. Nck
proteins are adaptors that modulate actin cytoskeleton
dynamics by linking proline-rich effector molecules to
tyrosine kinases or phosphorylated signaling
intermediates. There are two members known in this
family: Nck1 (Nckalpha) and Nck2 (Nckbeta and Growth
factor receptor-bound protein 4 (Grb4)). They are
characterized by having 3 SH3 domains and a C-terminal
SH2 domain. Nck1 and Nck2 have overlapping functions as
determined by gene knockouts. Both bind receptor
tyrosine kinases and other tyrosine-phosphorylated
proteins through their SH2 domains. In addition they
also bind distinct targets. Neuronal signaling
proteins: EphrinB1, EphrinB2, and Disabled-1 (Dab-1) all
bind to Nck-2 exclusively. And in the case of PDGFR,
Tyr(P)751 binds to Nck1 while Tyr(P)1009 binds to Nck2.
Nck1 and Nck2 have a role in the infection process of
enteropathogenic Escherichia coli (EPEC). Their SH3
domains are involved in recruiting and activating the
N-WASP/Arp2/3 complex inducing actin polymerization
resulting in the production of pedestals, dynamic
bacteria-presenting protrusions of the plasma membrane.
A similar thing occurs in the vaccinia virus where
motile plasma membrane projections are formed beneath
the virus. Recently it has been shown that the SH2
domains of both Nck1 and Nck2 bind the G-protein coupled
receptor kinase-interacting protein 1 (GIT1) in a
phosphorylation-dependent manner. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 97
Score = 71.6 bits (175), Expect = 1e-15
Identities = 39/86 (45%), Positives = 58/86 (67%), Gaps = 4/86 (4%)
Query: 60 WYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSDGVQHFKV-LRDSSGKF 117
WYYG++TR AE L+ + +EG FLIR SESSP DFS+S+K +HFKV L++ +
Sbjct: 3 WYYGKVTRHQAEMALNERGNEGDFLIRDSESSPNDFSVSLKAQGKNKHFKVQLKECV--Y 60
Query: 118 FLWVVKFNSLNELVEYHRTASVSRSQ 143
+ KF+S+ ELVE+++ A + S+
Sbjct: 61 CIGQRKFSSMEELVEHYKKAPIFTSE 86
Score = 71.6 bits (175), Expect = 1e-15
Identities = 39/86 (45%), Positives = 58/86 (67%), Gaps = 4/86 (4%)
Query: 239 WYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSDGVQHFKV-LRDSSGKF 296
WYYG++TR AE L+ + +EG FLIR SESSP DFS+S+K +HFKV L++ +
Sbjct: 3 WYYGKVTRHQAEMALNERGNEGDFLIRDSESSPNDFSVSLKAQGKNKHFKVQLKECV--Y 60
Query: 297 FLWVVKFNSLNELVEYHRTASVSRSQ 322
+ KF+S+ ELVE+++ A + S+
Sbjct: 61 CIGQRKFSSMEELVEHYKKAPIFTSE 86
>gnl|CDD|212737 cd11803, SH3_Endophilin_A, Src homology 3 domain of Endophilin-A.
Endophilins play roles in synaptic vesicle formation,
virus budding, mitochondrial morphology maintenance,
receptor-mediated endocytosis inhibition, and endosomal
sorting. They are classified into two types, A and B.
Vertebrates contain three endophilin-A isoforms (A1, A2,
and A3). Endophilin-A proteins are enriched in the brain
and play multiple roles in receptor-mediated
endocytosis. They tubulate membranes and regulate
calcium influx into neurons to trigger the activation of
the endocytic machinery. They are also involved in the
sorting of plasma membrane proteins, actin filament
assembly, and the uncoating of clathrin-coated vesicles
for fusion with endosomes. Endophilins contain an
N-terminal N-BAR domain (BAR domain with an additional
N-terminal amphipathic helix), followed by a variable
region containing proline clusters, and a C-terminal SH3
domain. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 70.0 bits (172), Expect = 2e-15
Identities = 22/49 (44%), Positives = 35/49 (71%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ALYDF P+ GEL F+ GD+IT+T++ D++W+ G + + G FP Y+
Sbjct: 4 RALYDFEPENEGELGFKEGDIITLTNQIDENWYEGMVNGQSGFFPVNYV 52
Score = 45.7 bits (109), Expect = 6e-07
Identities = 18/50 (36%), Positives = 29/50 (58%), Gaps = 1/50 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A +DF E EL F++ ++ + N D+ NWY ++G+ G P NY+E
Sbjct: 5 ALYDFEPENEGELGFKEGDIITLTNQIDE-NWYEGMVNGQSGFFPVNYVE 53
Score = 32.2 bits (74), Expect = 0.034
Identities = 10/17 (58%), Positives = 13/17 (76%)
Query: 337 QALYDFTPQEPGELEFR 353
+ALYDF P+ GEL F+
Sbjct: 4 RALYDFEPENEGELGFK 20
>gnl|CDD|198272 cd10409, SH2_Nck2, Src homology 2 (SH2) domain found in Nck. Nck
proteins are adaptors that modulate actin cytoskeleton
dynamics by linking proline-rich effector molecules to
tyrosine kinases or phosphorylated signaling
intermediates. There are two members known in this
family: Nck1 (Nckalpha) and Nck2 (Nckbeta and Growth
factor receptor-bound protein 4 (Grb4)). They are
characterized by having 3 SH3 domains and a C-terminal
SH2 domain. Nck1 and Nck2 have overlapping functions as
determined by gene knockouts. Both bind receptor
tyrosine kinases and other tyrosine-phosphorylated
proteins through their SH2 domains. In addition they
also bind distinct targets. Neuronal signaling
proteins: EphrinB1, EphrinB2, and Disabled-1 (Dab-1) all
bind to Nck-2 exclusively. And in the case of PDGFR,
Tyr(P)751 binds to Nck1 while Tyr(P)1009 binds to Nck2.
Nck1 and Nck2 have a role in the infection process of
enteropathogenic Escherichia coli (EPEC). Their SH3
domains are involved in recruiting and activating the
N-WASP/Arp2/3 complex inducing actin polymerization
resulting in the production of pedestals, dynamic
bacteria-presenting protrusions of the plasma membrane.
A similar thing occurs in the vaccinia virus where
motile plasma membrane projections are formed beneath
the virus. Recently it has been shown that the SH2
domains of both Nck1 and Nck2 bind the G-protein coupled
receptor kinase-interacting protein 1 (GIT1) in a
phosphorylation-dependent manner. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 98
Score = 71.2 bits (174), Expect = 2e-15
Identities = 38/86 (44%), Positives = 56/86 (65%), Gaps = 2/86 (2%)
Query: 59 DWYYGRITRADAERLLSNKH-EGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 117
+WYYG +TR AE L+ + EG FLIR SESSP DFS+S+K +HFKV + +
Sbjct: 2 EWYYGNVTRHQAECALNERGVEGDFLIRDSESSPSDFSVSLKAVGKNKHFKV-QLVDNVY 60
Query: 118 FLWVVKFNSLNELVEYHRTASVSRSQ 143
+ +FNS++ELVE+++ A + S+
Sbjct: 61 CIGQRRFNSMDELVEHYKKAPIFTSE 86
Score = 71.2 bits (174), Expect = 2e-15
Identities = 38/86 (44%), Positives = 56/86 (65%), Gaps = 2/86 (2%)
Query: 238 DWYYGRITRADAERLLSNKH-EGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 296
+WYYG +TR AE L+ + EG FLIR SESSP DFS+S+K +HFKV + +
Sbjct: 2 EWYYGNVTRHQAECALNERGVEGDFLIRDSESSPSDFSVSLKAVGKNKHFKV-QLVDNVY 60
Query: 297 FLWVVKFNSLNELVEYHRTASVSRSQ 322
+ +FNS++ELVE+++ A + S+
Sbjct: 61 CIGQRRFNSMDELVEHYKKAPIFTSE 86
>gnl|CDD|212776 cd11842, SH3_Ysc84p_like, Src homology 3 domain of Ysc84p and
similar fungal proteins. This family is composed of the
Saccharomyces cerevisiae proteins, Ysc84p (also called
LAS17-binding protein 4, Lsb4p) and Lsb3p, and similar
fungal proteins. They contain an N-terminal SYLF domain
(also called DUF500) and a C-terminal SH3 domain. Ysc84p
localizes to actin patches and plays an important in
actin polymerization during endocytosis. The N-terminal
domain of both Ysc84p and Lsb3p can bind and bundle
actin filaments. A study of the yeast SH3 domain
interactome predicts that the SH3 domains of Lsb3p and
Lsb4p may function as molecular hubs for the assembly of
endocytic complexes. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 69.8 bits (171), Expect = 2e-15
Identities = 26/50 (52%), Positives = 37/50 (74%), Gaps = 2/50 (4%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQH--WWHGEIGARKGLFPATYI 206
ALYDF ++PG+L F++GD+IT+ +SD WW G IG R+G+FPA Y+
Sbjct: 4 ALYDFAGEQPGDLAFQKGDIITILKKSDSQNDWWTGRIGGREGIFPANYV 53
Score = 51.3 bits (123), Expect = 7e-09
Identities = 19/54 (35%), Positives = 33/54 (61%), Gaps = 1/54 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMN-WYRAELDGKEGLIPSNYIE 54
+A+A +DF +L+F+K ++ IL D N W+ + G+EG+ P+NY+E
Sbjct: 1 KAVALYDFAGEQPGDLAFQKGDIITILKKSDSQNDWWTGRIGGREGIFPANYVE 54
Score = 28.9 bits (65), Expect = 0.49
Identities = 11/32 (34%), Positives = 21/32 (65%)
Query: 338 ALYDFTPQEPGELEFRRDLKIKRRKSAKTKDE 369
ALYDF ++PG+L F++ I K + ++++
Sbjct: 4 ALYDFAGEQPGDLAFQKGDIITILKKSDSQND 35
>gnl|CDD|212703 cd11769, SH3_CSK, Src Homology 3 domain of C-terminal Src kinase.
CSK is a cytoplasmic (or nonreceptor) tyr kinase
containing the Src homology domains, SH3 and SH2,
N-terminal to the catalytic tyr kinase domain. They
negatively regulate the activity of Src kinases that
are anchored to the plasma membrane. To inhibit Src
kinases, CSK is translocated to the membrane via
binding to specific transmembrane proteins, G-proteins,
or adaptor proteins near the membrane. CSK catalyzes
the tyr phosphorylation of the regulatory C-terminal
tail of Src kinases, resulting in their inactivation.
It is expressed in a wide variety of tissues and plays
a role, as a regulator of Src, in cell proliferation,
survival, and differentiation, and consequently, in
cancer development and progression. In addition, CSK
also shows Src-independent functions. It is a critical
component in G-protein signaling, and plays a role in
cytoskeletal reorganization and cell migration. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 68.5 bits (168), Expect = 4e-15
Identities = 25/55 (45%), Positives = 41/55 (74%), Gaps = 1/55 (1%)
Query: 1 MEAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAE-LDGKEGLIPSNYIE 54
E IAK++FN +E++L F+K +L I+ + D NWY+A+ DG+EG+IP+NY++
Sbjct: 2 TECIAKYNFNGASEEDLPFKKGDILTIVAVTKDPNWYKAKNKDGREGMIPANYVQ 56
Score = 53.1 bits (128), Expect = 1e-09
Identities = 23/81 (28%), Positives = 39/81 (48%), Gaps = 28/81 (34%)
Query: 154 ECLVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDM 213
EC+ A Y+F +L F++GD++T+ + D
Sbjct: 3 ECI--AKYNFNGASEEDLPFKKGDILTIVAVT-------------------------KDP 35
Query: 214 NWYRAE-LDGKEGLIPSNYIE 233
NWY+A+ DG+EG+IP+NY++
Sbjct: 36 NWYKAKNKDGREGMIPANYVQ 56
>gnl|CDD|212883 cd11950, SH3_GRAP2_C, C-terminal Src homology 3 domain of
GRB2-related adaptor protein 2. GRAP2 is also called
GADS (GRB2-related adapter downstream of Shc), GrpL,
GRB2L, Mona, or GRID (Grb2-related protein with insert
domain). It is expressed specifically in the
hematopoietic system. It plays an important role in T
cell receptor (TCR) signaling by promoting the formation
of the SLP-76:LAT complex, which couples the TCR to the
Ras pathway. It also has roles in antigen-receptor and
tyrosine kinase mediated signaling. GRAP2 is unique from
other GRB2-like adaptor proteins in that it can be
regulated by caspase cleavage. It contains an N-terminal
SH3 domain, a central SH2 domain, and a C-terminal SH3
domain. The C-terminal SH3 domain of GRAP2 binds to
different motifs found in substrate peptides including
the typical PxxP motif in hematopoietic progenitor
kinase 1 (HPK1), the RxxK motif in SLP-76 and HPK1, and
the RxxxxK motif in phosphatase-like protein HD-PTP. SH3
domains are protein interaction domains that typically
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 67.9 bits (166), Expect = 8e-15
Identities = 26/52 (50%), Positives = 31/52 (59%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILN 208
V+ALYDF E EL F GDVI V D S+ WW G + + GLFPA Y+
Sbjct: 2 VRALYDFEALEDDELGFNSGDVIEVLDSSNPSWWKGRLHGKLGLFPANYVAP 53
Score = 47.5 bits (113), Expect = 1e-07
Identities = 19/52 (36%), Positives = 31/52 (59%), Gaps = 1/52 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A +DF A +DEL F V+++L+ + +W++ L GK GL P+NY+
Sbjct: 2 VRALYDFEALEDDELGFNSGDVIEVLDSSNP-SWWKGRLHGKLGLFPANYVA 52
Score = 26.7 bits (59), Expect = 2.9
Identities = 10/18 (55%), Positives = 11/18 (61%)
Query: 336 VQALYDFTPQEPGELEFR 353
V+ALYDF E EL F
Sbjct: 2 VRALYDFEALEDDELGFN 19
>gnl|CDD|212716 cd11782, SH3_Sorbs_2, Second Src Homology 3 domain of Sorbin and
SH3 domain containing (Sorbs) proteins and similar
domains. This family, also called the vinexin family,
is composed predominantly of adaptor proteins containing
one sorbin homology (SoHo) and three SH3 domains.
Members include the second SH3 domains of Sorbs1 (or
ponsin), Sorbs2 (or ArgBP2), Vinexin (or Sorbs3), and
similar domains. They are involved in the regulation of
cytoskeletal organization, cell adhesion, and growth
factor signaling. Members of this family bind multiple
partners including signaling molecules like c-Abl,
c-Arg, Sos, and c-Cbl, as well as cytoskeletal molecules
such as vinculin and afadin. They may have overlapping
functions. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 67.4 bits (165), Expect = 1e-14
Identities = 24/48 (50%), Positives = 34/48 (70%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
A Y+F EL FR+GDVIT+T R D++W+ G IG R+G+FP +Y+
Sbjct: 4 AKYNFNADTGVELSFRKGDVITLTRRVDENWYEGRIGGRQGIFPVSYV 51
Score = 54.7 bits (132), Expect = 4e-10
Identities = 22/53 (41%), Positives = 34/53 (64%), Gaps = 1/53 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
EA AK++FNA ELSFRK V+ + D+ NWY + G++G+ P +Y++
Sbjct: 1 EARAKYNFNADTGVELSFRKGDVITLTRRVDE-NWYEGRIGGRQGIFPVSYVQ 52
>gnl|CDD|198210 cd10347, SH2_Nterm_shark_like, N-terminal Src homology 2 (SH2)
domain found in SH2 domains, ANK, and kinase domain
(shark) proteins. These non-receptor protein-tyrosine
kinases contain two SH2 domains, five ankyrin (ANK)-like
repeats, and a potential tyrosine phosphorylation site
in the carboxyl-terminal tail which resembles the
phosphorylation site in members of the src family. Like,
mammalian non-receptor protein-tyrosine kinases, ZAP-70
and syk proteins, they do not have SH3 domains. However,
the presence of ANK makes these unique among
protein-tyrosine kinases. Both tyrosine kinases and ANK
repeats have been shown to transduce developmental
signals, and SH2 domains are known to participate
intimately in tyrosine kinase signaling. These tyrosine
kinases are believed to be involved in epithelial cell
polarity. The members of this family include the shark
(SH2 domains, ANK, and kinase domain) gene in Drosophila
and yellow fever mosquitos, as well as the hydra protein
HTK16. Drosophila Shark is proposed to transduce
intracellularly the Crumbs, a protein necessary for
proper organization of ectodermal epithelia,
intercellular signal. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 81
Score = 67.4 bits (165), Expect = 3e-14
Identities = 29/79 (36%), Positives = 47/79 (59%), Gaps = 4/79 (5%)
Query: 60 WYYGRITRADAERLLSNK--HEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 117
WY+G+I+R AE LL + +G FL+R S S+PGD+ LS+ V H+++ R F
Sbjct: 3 WYHGKISREVAEALLLREGGRDGLFLVRESTSAPGDYVLSLLAQGEVLHYQIRRHGEDAF 62
Query: 118 FLWV--VKFNSLNELVEYH 134
F + F+ L+ L+E++
Sbjct: 63 FSDDGPLIFHGLDTLIEHY 81
Score = 67.4 bits (165), Expect = 3e-14
Identities = 29/79 (36%), Positives = 47/79 (59%), Gaps = 4/79 (5%)
Query: 239 WYYGRITRADAERLLSNK--HEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 296
WY+G+I+R AE LL + +G FL+R S S+PGD+ LS+ V H+++ R F
Sbjct: 3 WYHGKISREVAEALLLREGGRDGLFLVRESTSAPGDYVLSLLAQGEVLHYQIRRHGEDAF 62
Query: 297 FLWV--VKFNSLNELVEYH 313
F + F+ L+ L+E++
Sbjct: 63 FSDDGPLIFHGLDTLIEHY 81
>gnl|CDD|198233 cd10370, SH2_Src_Src42, Src homology 2 (SH2) domain found in the
Src oncogene at 42A (Src42). Src42 is a member of the
Src non-receptor type tyrosine kinase family of
proteins. The integration of receptor tyrosine
kinase-induced RAS and Src42 signals by Connector
eNhancer of KSR (CNK) as a two-component input is
essential for RAF activation in Drosophila. Src42 is
present in a wide variety of organisms including:
California sea hare, pea aphid, yellow fever mosquito,
honey bee, Panamanian leafcutter ant, and sea urchin.
Src42 has a unique N-terminal domain, an SH3 domain, an
SH2 domain, a kinase domain and a regulatory tail, as do
the other members of the family. Like the other members
of the Src family the SH2 domain in addition to binding
the target, also plays an autoinhibitory role by binding
to its C-terminal tail. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 96
Score = 66.8 bits (163), Expect = 6e-14
Identities = 35/78 (44%), Positives = 49/78 (62%), Gaps = 3/78 (3%)
Query: 60 WYYGRITRADAER--LLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLR-DSSGK 116
WY+G+I R +AE+ LL GAFLIR SES D+SLSV+ D V+H+++ + D G
Sbjct: 5 WYFGKIKRIEAEKKLLLPENEHGAFLIRDSESRHNDYSLSVRDGDTVKHYRIRQLDEGGF 64
Query: 117 FFLWVVKFNSLNELVEYH 134
F F +L ELVE++
Sbjct: 65 FIARRTTFRTLQELVEHY 82
Score = 66.8 bits (163), Expect = 6e-14
Identities = 35/78 (44%), Positives = 49/78 (62%), Gaps = 3/78 (3%)
Query: 239 WYYGRITRADAER--LLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLR-DSSGK 295
WY+G+I R +AE+ LL GAFLIR SES D+SLSV+ D V+H+++ + D G
Sbjct: 5 WYFGKIKRIEAEKKLLLPENEHGAFLIRDSESRHNDYSLSVRDGDTVKHYRIRQLDEGGF 64
Query: 296 FFLWVVKFNSLNELVEYH 313
F F +L ELVE++
Sbjct: 65 FIARRTTFRTLQELVEHY 82
>gnl|CDD|215659 pfam00018, SH3_1, SH3 domain. SH3 (Src homology 3) domains are
often indicative of a protein involved in signal
transduction related to cytoskeletal organisation. First
described in the Src cytoplasmic tyrosine kinase. The
structure is a partly opened beta barrel.
Length = 47
Score = 64.9 bits (159), Expect = 9e-14
Identities = 23/47 (48%), Positives = 33/47 (70%), Gaps = 1/47 (2%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGE-IGARKGLFPA 203
ALYD+T +EP EL F++GD+I V ++SD WW G G ++GL P+
Sbjct: 1 VALYDYTAREPDELSFKKGDIIIVLEKSDDGWWKGRLKGGKEGLIPS 47
Score = 59.5 bits (145), Expect = 7e-12
Identities = 22/48 (45%), Positives = 31/48 (64%), Gaps = 2/48 (4%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAEL-DGKEGLIPS 50
+A +D+ A DELSF+K ++ +L DD W++ L GKEGLIPS
Sbjct: 1 VALYDYTAREPDELSFKKGDIIIVLEKSDD-GWWKGRLKGGKEGLIPS 47
Score = 31.4 bits (72), Expect = 0.054
Identities = 11/23 (47%), Positives = 15/23 (65%)
Query: 337 QALYDFTPQEPGELEFRRDLKIK 359
ALYD+T +EP EL F++ I
Sbjct: 1 VALYDYTAREPDELSFKKGDIII 23
>gnl|CDD|198193 cd09940, SH2_Vav_family, Src homology 2 (SH2) domain found in the
Vav family. Vav proteins are involved in several
processes that require cytoskeletal reorganization, such
as the formation of the immunological synapse (IS),
phagocytosis, platelet aggregation, spreading, and
transformation. Vavs function as guanine nucleotide
exchange factors (GEFs) for the Rho/Rac family of
GTPases. Vav family members have several conserved
motifs/domains including: a leucine-rich region, a
leucine-zipper, a calponin homology (CH) domain, an
acidic domain, a Dbl-homology (DH) domain, a pleckstrin
homology (PH) domain, a cysteine-rich domain, 2 SH3
domains, a proline-rich region, and a SH2 domain. Vavs
are the only known Rho GEFs that have both the DH/PH
motifs and SH2/SH3 domains in the same protein. The
leucine-rich helix-loop-helix (HLH) domain is thought to
be involved in protein heterodimerization with other HLH
proteins and it may function as a negative regulator by
forming inactive heterodimers. The CH domain is usually
involved in the association with filamentous actin, but
in Vav it controls NFAT stimulation, Ca2+ mobilization,
and its transforming activity. Acidic domains are
involved in protein-protein interactions and contain
regulatory tyrosines. The DH domain is a GDP-GTP
exchange factor on Rho/Rac GTPases. The PH domain in
involved in interactions with GTP-binding proteins,
lipids and/or phosphorylated serine/threonine residues.
The SH3 domain is involved in localization of proteins
to specific sites within the cell interacting with
protein with proline-rich sequences. The SH2 domain
mediates a high affinity interaction with tyrosine
phosphorylated proteins. There are three Vav mammalian
family members: Vav1 which is expressed in the
hematopoietic system, Vav2 and Vav3 are more
ubiquitously expressed. The members here include insect
and amphibian Vavs. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 102
Score = 66.2 bits (162), Expect = 1e-13
Identities = 28/86 (32%), Positives = 47/86 (54%), Gaps = 1/86 (1%)
Query: 58 HDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 117
W+ G + R AE L N+ +G +L+RV ++LS+K + V+H K+ + S G +
Sbjct: 5 FLWFVGEMERDTAENRLENRPDGTYLVRVRPQGETQYALSIKYNGDVKHMKIEQRSDGLY 64
Query: 118 FLWVVK-FNSLNELVEYHRTASVSRS 142
+L + F SL ELV Y+ S+ +
Sbjct: 65 YLSESRHFKSLVELVNYYERNSLGEN 90
Score = 66.2 bits (162), Expect = 1e-13
Identities = 28/86 (32%), Positives = 47/86 (54%), Gaps = 1/86 (1%)
Query: 237 HDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 296
W+ G + R AE L N+ +G +L+RV ++LS+K + V+H K+ + S G +
Sbjct: 5 FLWFVGEMERDTAENRLENRPDGTYLVRVRPQGETQYALSIKYNGDVKHMKIEQRSDGLY 64
Query: 297 FLWVVK-FNSLNELVEYHRTASVSRS 321
+L + F SL ELV Y+ S+ +
Sbjct: 65 YLSESRHFKSLVELVNYYERNSLGEN 90
>gnl|CDD|198230 cd10367, SH2_Src_Fgr, Src homology 2 (SH2) domain found in
Gardner-Rasheed feline sarcoma viral (v-fgr) oncogene
homolog, Fgr. Fgr is a member of the Src non-receptor
type tyrosine kinase family of proteins. The protein
contains N-terminal sites for myristoylation and
palmitoylation, a PTK domain, and SH2 and SH3 domains
which are involved in mediating protein-protein
interactions with phosphotyrosine-containing and
proline-rich motifs, respectively. Fgr is expressed in
B-cells and myeloid cells, localizes to plasma membrane
ruffles, and functions as a negative regulator of cell
migration and adhesion triggered by the beta-2 integrin
signal transduction pathway. Multiple alternatively
spliced variants, encoding the same protein, have been
identified Fgr has been shown to interact with
Wiskott-Aldrich syndrome protein. Fgr has a unique
N-terminal domain, an SH3 domain, an SH2 domain, a
kinase domain and a regulatory tail, as do the other
members of the family. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 66.1 bits (161), Expect = 1e-13
Identities = 32/84 (38%), Positives = 53/84 (63%), Gaps = 8/84 (9%)
Query: 59 DWYYGRITRADAERLL--SNKHEGAFLIRVSESSPGDFSLSVK-----CSDGVQHFKVLR 111
+WY+G+I R DAER L GAFLIR SE++ G +SLS++ D V+H+K+ +
Sbjct: 4 EWYFGKIGRKDAERQLLSPGNPRGAFLIRESETTKGAYSLSIRDWDQNRGDHVKHYKIRK 63
Query: 112 -DSSGKFFLWVVKFNSLNELVEYH 134
D+ G + +F+++ ELV+++
Sbjct: 64 LDTGGYYITTRAQFDTVQELVQHY 87
Score = 66.1 bits (161), Expect = 1e-13
Identities = 32/84 (38%), Positives = 53/84 (63%), Gaps = 8/84 (9%)
Query: 238 DWYYGRITRADAERLL--SNKHEGAFLIRVSESSPGDFSLSVK-----CSDGVQHFKVLR 290
+WY+G+I R DAER L GAFLIR SE++ G +SLS++ D V+H+K+ +
Sbjct: 4 EWYFGKIGRKDAERQLLSPGNPRGAFLIRESETTKGAYSLSIRDWDQNRGDHVKHYKIRK 63
Query: 291 -DSSGKFFLWVVKFNSLNELVEYH 313
D+ G + +F+++ ELV+++
Sbjct: 64 LDTGGYYITTRAQFDTVQELVQHY 87
>gnl|CDD|212706 cd11772, SH3_OSTF1, Src Homology 3 domain of metazoan osteoclast
stimulating factor 1. OSTF1, also named OSF or SH3P2,
is a signaling protein containing SH3 and ankyrin-repeat
domains. It acts through a Src-related pathway to
enhance the formation of osteoclasts and bone
resorption. It also acts as a negative regulator of cell
motility. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 64.2 bits (157), Expect = 2e-13
Identities = 21/50 (42%), Positives = 32/50 (64%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ALYD+ Q P EL F GD++ ++D+SD +WW G + GL P+ Y+
Sbjct: 2 FRALYDYEAQHPDELSFEEGDLLYISDKSDPNWWKATCGGKTGLIPSNYV 51
Score = 55.0 bits (133), Expect = 2e-10
Identities = 24/50 (48%), Positives = 32/50 (64%), Gaps = 1/50 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A +D+ A DELSF + +L I + D NW++A GK GLIPSNY+E
Sbjct: 4 ALYDYEAQHPDELSFEEGDLLYISDKSDP-NWWKATCGGKTGLIPSNYVE 52
Score = 27.6 bits (62), Expect = 1.3
Identities = 9/17 (52%), Positives = 11/17 (64%)
Query: 336 VQALYDFTPQEPGELEF 352
+ALYD+ Q P EL F
Sbjct: 2 FRALYDYEAQHPDELSF 18
>gnl|CDD|198185 cd09931, SH2_C-SH2_SHP_like, C-terminal Src homology 2 (C-SH2)
domain found in SH2 domain Phosphatases (SHP) proteins.
The SH2 domain phosphatases (SHP-1, SHP-2/Syp,
Drosophila corkscrew (csw), and Caenorhabditis elegans
Protein Tyrosine Phosphatase (Ptp-2)) are cytoplasmic
signaling enzymes. They are both targeted and regulated
by interactions of their SH2 domains with
phosphotyrosine docking sites. These proteins contain
two SH2 domains (N-SH2, C-SH2) followed by a tyrosine
phosphatase (PTP) domain, and a C-terminal extension.
Shp1 and Shp2 have two tyrosyl phosphorylation sites in
their C-tails, which are phosphorylated differentially
by receptor and nonreceptor PTKs. Csw retains the
proximal tyrosine and Ptp-2 lacks both sites.
Shp-binding proteins include receptors, scaffolding
adapters, and inhibitory receptors. Some of these bind
both Shp1 and Shp2 while others bind only one. Most
proteins that bind a Shp SH2 domain contain one or more
immuno-receptor tyrosine-based inhibitory motifs
(ITIMs): [SIVL]xpYxx[IVL]. Shp1 N-SH2 domain blocks the
catalytic domain and keeps the enzyme in the inactive
conformation, and is thus believed to regulate the
phosphatase activity of SHP-1. Its C-SH2 domain is
thought to be involved in searching for phosphotyrosine
activators. The SHP2 N-SH2 domain is a conformational
switch; it either binds and inhibits the phosphatase, or
it binds phosphoproteins and activates the enzyme. The
C-SH2 domain contributes binding energy and specificity,
but it does not have a direct role in activation. Csw
SH2 domain function is essential, but either SH2 domain
can fulfill this requirement. The role of the csw SH2
domains during Sevenless receptor tyrosine kinase (SEV)
signaling is to bind Daughter of Sevenless rather than
activated SEV. Ptp-2 acts in oocytes downstream of
sheath/oocyte gap junctions to promote major sperm
protein (MSP)-induced MAP Kinase (MPK-1)
phosphorylation. Ptp-2 functions in the oocyte
cytoplasm, not at the cell surface to inhibit multiple
RasGAPs, resulting in sustained Ras activation. It is
thought that MSP triggers PTP-2/Ras activation and ROS
production to stimulate MPK-1 activity essential for
oocyte maturation and that secreted MSP domains and
Cu/Zn superoxide dismutases function antagonistically to
control ROS and MAPK signaling. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 99
Score = 65.0 bits (159), Expect = 2e-13
Identities = 32/79 (40%), Positives = 51/79 (64%), Gaps = 4/79 (5%)
Query: 60 WYYGRITRADAERLLSNKHE-GAFLIRVSESSPGDFSLSVKCSDG-VQHFKVLRDSSGKF 117
W++G ++ +AE+LL K + G+FL+R S+S PGDF LSV+ D V H + R GK+
Sbjct: 2 WFHGHLSGKEAEKLLLEKGKPGSFLVRESQSKPGDFVLSVRTDDDKVTHIMI-RCQGGKY 60
Query: 118 -FLWVVKFNSLNELVEYHR 135
+F+SL +LVE+++
Sbjct: 61 DVGGGEEFDSLTDLVEHYK 79
Score = 65.0 bits (159), Expect = 2e-13
Identities = 32/79 (40%), Positives = 51/79 (64%), Gaps = 4/79 (5%)
Query: 239 WYYGRITRADAERLLSNKHE-GAFLIRVSESSPGDFSLSVKCSDG-VQHFKVLRDSSGKF 296
W++G ++ +AE+LL K + G+FL+R S+S PGDF LSV+ D V H + R GK+
Sbjct: 2 WFHGHLSGKEAEKLLLEKGKPGSFLVRESQSKPGDFVLSVRTDDDKVTHIMI-RCQGGKY 60
Query: 297 -FLWVVKFNSLNELVEYHR 314
+F+SL +LVE+++
Sbjct: 61 DVGGGEEFDSLTDLVEHYK 79
>gnl|CDD|212929 cd11996, SH3_Intersectin2_5, Fifth Src homology 3 domain (or
SH3E) of Intersectin-2. Intersectin-2 (ITSN2) is an
adaptor protein that functions in exo- and endocytosis,
actin cytoskeletal reorganization, and signal
transduction. It plays a role in clathrin-coated pit
(CCP) formation. It binds to many proteins through its
multidomain structure and facilitate the assembly of
multimeric complexes. ITSN2 also functions as a
specific GEF for Cdc42 activation in epithelial
morphogenesis, and is required in mitotic spindle
orientation. It exists in alternatively spliced short
and long isoforms. The short isoform contains two Eps15
homology domains (EH1 and EH2), a coiled-coil region
and five SH3 domains (SH3A-E), while the long isoform,
in addition, contains RhoGEF (also called
Dbl-homologous or DH), Pleckstrin homology (PH) and C2
domains. The fifth SH3 domain (or SH3E) of ITSN2 is
expected to bind protein partners, similar to ITSN1
which has been shown to bind many protein partners
including SGIP1, Sos1, dynamin1/2, CIN85, c-Cbl, SHIP2,
N-WASP, and synaptojanin-1, among others. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 63.8 bits (155), Expect = 2e-13
Identities = 26/54 (48%), Positives = 40/54 (74%), Gaps = 1/54 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
+ IA +D+ A EDELSF K Q++ +LN +DD +W++ E++G GL PSNY++M
Sbjct: 2 QVIAMYDYTANNEDELSFSKGQLINVLN-KDDPDWWQGEINGVTGLFPSNYVKM 54
Score = 57.7 bits (139), Expect = 3e-11
Identities = 23/52 (44%), Positives = 31/52 (59%)
Query: 155 CLVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
C V A+YD+T EL F +G +I V ++ D WW GEI GLFP+ Y+
Sbjct: 1 CQVIAMYDYTANNEDELSFSKGQLINVLNKDDPDWWQGEINGVTGLFPSNYV 52
>gnl|CDD|212774 cd11840, SH3_Intersectin_5, Fifth Src homology 3 domain (or SH3E)
of Intersectin. Intersectins (ITSNs) are adaptor
proteins that function in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction.
They are essential for initiating clathrin-coated pit
formation. They bind to many proteins through their
multidomain structure and facilitate the assembly of
multimeric complexes. Vertebrates contain two ITSN
proteins, ITSN1 and ITSN2, which exist in alternatively
spliced short and long isoforms. The short isoforms
contain two Eps15 homology domains (EH1 and EH2), a
coiled-coil region and five SH3 domains (SH3A-E), while
the long isoforms, in addition, contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin homology (PH)
and C2 domains. ITSN1 and ITSN2 are both widely
expressed, with variations depending on tissue type and
stage of development. The fifth SH3 domain (or SH3E) of
ITSN1 has been shown to bind many protein partners
including SGIP1, Sos1, dynamin1/2, CIN85, c-Cbl, SHIP2,
N-WASP, and synaptojanin-1, among others. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 63.6 bits (155), Expect = 3e-13
Identities = 25/52 (48%), Positives = 37/52 (71%), Gaps = 1/52 (1%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
IA + A EDELSF+K ++ +L+ +DD +W+R EL+G+ GL PSNY+E
Sbjct: 3 IALFPYTAQNEDELSFQKGDIINVLS-KDDPDWWRGELNGQTGLFPSNYVEP 53
Score = 62.0 bits (151), Expect = 8e-13
Identities = 22/50 (44%), Positives = 32/50 (64%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V AL+ +T Q EL F++GD+I V + D WW GE+ + GLFP+ Y+
Sbjct: 2 VIALFPYTAQNEDELSFQKGDIINVLSKDDPDWWRGELNGQTGLFPSNYV 51
>gnl|CDD|212757 cd11823, SH3_Nostrin, Src homology 3 domain of Nitric Oxide
Synthase TRaffic INducer. Nostrin is expressed in
endothelial and epithelial cells and is involved in the
regulation, trafficking and targeting of endothelial NOS
(eNOS). It facilitates the endocytosis of eNOS by
coordinating the functions of dynamin and the
Wiskott-Aldrich syndrome protein (WASP). Increased
expression of Nostrin may be correlated to preeclampsia.
Nostrin contains an N-terminal F-BAR domain and a
C-terminal SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 63.5 bits (155), Expect = 3e-13
Identities = 22/48 (45%), Positives = 31/48 (64%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
ALY +T EL + GD+I V ++ D WW GE+ +KG+FPATY+
Sbjct: 4 ALYSYTANREDELSLQPGDIIEVHEKQDDGWWLGELNGKKGIFPATYV 51
Score = 43.1 bits (102), Expect = 5e-06
Identities = 18/50 (36%), Positives = 32/50 (64%), Gaps = 1/50 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A + + A EDELS + ++++ +DD W+ EL+GK+G+ P+ Y+E
Sbjct: 4 ALYSYTANREDELSLQPGDIIEVHEKQDD-GWWLGELNGKKGIFPATYVE 52
>gnl|CDD|198221 cd10358, SH2_PTK6_Brk, Src homology 2 domain found in
protein-tyrosine kinase-6 (PTK6) which is also known as
breast tumor kinase (Brk). Human protein-tyrosine
kinase-6 (PTK6, also known as breast tumor kinase (Brk))
is a member of the non-receptor protein-tyrosine kinase
family and is expressed in two-thirds of all breast
tumors. PTK6 (9). PTK6 contains a SH3 domain, a SH2
domain, and catalytic domains. For the case of the
non-receptor protein-tyrosine kinases, the SH2 domain is
typically involved in negative regulation of kinase
activity by binding to a phosphorylated tyrosine residue
near to the C terminus. The C-terminal sequence of PTK6
(PTSpYENPT where pY is phosphotyrosine) is thought to be
a self-ligand for the SH2 domain. The structure of the
SH2 domain resembles other SH2 domains except for a
centrally located four-stranded antiparallel beta-sheet
(strands betaA, betaB, betaC, and betaD). There are also
differences in the loop length which might be
responsible for PTK6 ligand specificity. There are two
possible means of regulation of PTK6: autoinhibitory
with the phosphorylation of Tyr playing a role in its
negative regulation and autophosphorylation at this
site, though it has been shown that PTK6 might
phosphorylate signal transduction-associated proteins
Sam68 and signal transducing adaptor family member 2
(STAP/BKS) in vivo. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 100
Score = 64.8 bits (157), Expect = 4e-13
Identities = 38/84 (45%), Positives = 52/84 (61%), Gaps = 3/84 (3%)
Query: 60 WYYGRITRADAERLLS--NKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 117
W++G I+R++A R L GAFLIRVSE D+ LSV+ + V+H+K+ R + G+
Sbjct: 4 WFFGCISRSEAVRRLQAEGNATGAFLIRVSEKPSADYVLSVRDTQAVRHYKIWRRAGGRL 63
Query: 118 FL-WVVKFNSLNELVEYHRTASVS 140
L V F SL ELV YHR S+S
Sbjct: 64 HLNEAVSFLSLPELVNYHRAQSLS 87
Score = 64.8 bits (157), Expect = 4e-13
Identities = 38/84 (45%), Positives = 52/84 (61%), Gaps = 3/84 (3%)
Query: 239 WYYGRITRADAERLLS--NKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 296
W++G I+R++A R L GAFLIRVSE D+ LSV+ + V+H+K+ R + G+
Sbjct: 4 WFFGCISRSEAVRRLQAEGNATGAFLIRVSEKPSADYVLSVRDTQAVRHYKIWRRAGGRL 63
Query: 297 FL-WVVKFNSLNELVEYHRTASVS 319
L V F SL ELV YHR S+S
Sbjct: 64 HLNEAVSFLSLPELVNYHRAQSLS 87
>gnl|CDD|198223 cd10360, SH2_Srm, Src homology 2 (SH2) domain found in Src-related
kinase lacking C-terminal regulatory tyrosine and
N-terminal myristoylation sites (srm). Srm is a
nonreceptor protein kinase that has two SH2 domains, a
SH3 domain, and a kinase domain with a tyrosine residue
for autophosphorylation. However it lacks an N-terminal
glycine for myristoylation and a C-terminal tyrosine
which suppresses kinase activity when phosphorylated.
Srm is most similar to members of the Tec family who
other members include: Tec, Btk/Emb, and Itk/Tsk/Emt.
However Srm differs in its N-terminal unique domain it
being much smaller than in the Tec family and is closer
to Src. Srm is thought to be a new family of nonreceptor
tyrosine kinases that may be redundant in function. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 79
Score = 63.8 bits (155), Expect = 4e-13
Identities = 33/79 (41%), Positives = 47/79 (59%), Gaps = 5/79 (6%)
Query: 60 WYYGRITRADAERLL---SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGK 116
WY+ I+R A++LL N+ GAFLIR SESS G +SLSV+ V H+++ SG
Sbjct: 2 WYFSGISRTQAQQLLLSPPNEP-GAFLIRPSESSLGGYSLSVRAQAKVCHYRICMAPSGS 60
Query: 117 FFLWVVK-FNSLNELVEYH 134
+L + F L EL+ Y+
Sbjct: 61 LYLQKGRLFPGLEELLAYY 79
Score = 63.8 bits (155), Expect = 4e-13
Identities = 33/79 (41%), Positives = 47/79 (59%), Gaps = 5/79 (6%)
Query: 239 WYYGRITRADAERLL---SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGK 295
WY+ I+R A++LL N+ GAFLIR SESS G +SLSV+ V H+++ SG
Sbjct: 2 WYFSGISRTQAQQLLLSPPNEP-GAFLIRPSESSLGGYSLSVRAQAKVCHYRICMAPSGS 60
Query: 296 FFLWVVK-FNSLNELVEYH 313
+L + F L EL+ Y+
Sbjct: 61 LYLQKGRLFPGLEELLAYY 79
>gnl|CDD|198225 cd10362, SH2_Src_Lck, Src homology 2 (SH2) domain in lymphocyte
cell kinase (Lck). Lck is a member of the Src
non-receptor type tyrosine kinase family of proteins. It
is expressed in the brain, T-cells, and NK cells. The
unique domain of Lck mediates its interaction with two
T-cell surface molecules, CD4 and CD8. It associates
with their cytoplasmic tails on CD4 T helper cells and
CD8 cytotoxic T cells to assist signaling from the T
cell receptor (TCR) complex. When the T cell receptor is
engaged by the specific antigen presented by MHC, Lck
phosphorylase the intracellular chains of the CD3 and
zeta-chains of the TCR complex, allowing ZAP-70 to bind
them. Lck then phosphorylates and activates ZAP-70,
which in turn phosphorylates Linker of Activated T cells
(LAT), a transmembrane protein that serves as a docking
site for proteins including: Shc-Grb2-SOS, PI3K, and
phospholipase C (PLC). The tyrosine phosphorylation
cascade culminates in the intracellular mobilization of
a calcium ions and activation of important signaling
cascades within the lymphocyte, including the
Ras-MEK-ERK pathway, which goes on to activate certain
transcription factors such as NFAT, NF-kappaB, and AP-1.
These transcription factors regulate the production
cytokines such as Interleukin-2 that promote long-term
proliferation and differentiation of the activated
lymphocytes. The N-terminal tail of Lck is
myristoylated and palmitoylated and it tethers the
protein to the plasma membrane of the cell. Lck also
contains a SH3 domain, a SH2 domain, and a C-terminal
tyrosine kinase domain. Lck has 2 phosphorylation sites,
the first an autophosphorylation site that is linked to
activation of the protein and the second which is
phosphorylated by Csk, which inhibits it. Lck is also
inhibited by SHP-1 dephosphorylation and by Cbl
ubiquitin ligase, which is part of the
ubiquitin-mediated pathway. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 64.5 bits (157), Expect = 4e-13
Identities = 34/88 (38%), Positives = 53/88 (60%), Gaps = 10/88 (11%)
Query: 60 WYYGRITRADAERLLS---NKHEGAFLIRVSESSPGDFSLSVK-----CSDGVQHFKVLR 111
W++ ++R DAER L N H G+FLIR SE++ G FSLSV+ + V+H+K+
Sbjct: 5 WFFKNLSRNDAERQLLAPGNTH-GSFLIRESETTAGSFSLSVRDFDQNQGEVVKHYKIRN 63
Query: 112 DSSGKFFLWV-VKFNSLNELVEYHRTAS 138
+G F++ + F L+ELV ++ AS
Sbjct: 64 LDNGGFYISPRITFPGLHELVRHYTNAS 91
Score = 64.5 bits (157), Expect = 4e-13
Identities = 34/88 (38%), Positives = 53/88 (60%), Gaps = 10/88 (11%)
Query: 239 WYYGRITRADAERLLS---NKHEGAFLIRVSESSPGDFSLSVK-----CSDGVQHFKVLR 290
W++ ++R DAER L N H G+FLIR SE++ G FSLSV+ + V+H+K+
Sbjct: 5 WFFKNLSRNDAERQLLAPGNTH-GSFLIRESETTAGSFSLSVRDFDQNQGEVVKHYKIRN 63
Query: 291 DSSGKFFLWV-VKFNSLNELVEYHRTAS 317
+G F++ + F L+ELV ++ AS
Sbjct: 64 LDNGGFYISPRITFPGLHELVRHYTNAS 91
>gnl|CDD|212767 cd11833, SH3_Stac_1, First C-terminal Src homology 3 domain of SH3
and cysteine-rich domain-containing (Stac) proteins.
Stac proteins are putative adaptor proteins that contain
a cysteine-rich C1 domain and one or two SH3 domains at
the C-terminus. There are three mammalian members
(Stac1, Stac2, and Stac3) of this family. Stac1 and
Stac3 contain two SH3 domains while Stac2 contains a
single SH3 domain at the C-terminus. This model
represents the first C-terminal SH3 domain of Stac1 and
Stac3, and the single C-terminal SH3 domain of Stac2.
Stac1 and Stac2 have been found to be expressed
differently in mature dorsal root ganglia (DRG) neurons.
Stac1 is mainly expressed in peptidergic neurons while
Stac2 is found in a subset of nonpeptidergic and all
trkB+ neurons. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 62.9 bits (153), Expect = 4e-13
Identities = 25/48 (52%), Positives = 32/48 (66%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
ALY F PQE +LE R GD IT+ D S++ WW G+I R G FPA ++
Sbjct: 4 ALYKFKPQENEDLEMRPGDKITLLDDSNEDWWKGKIEDRVGFFPANFV 51
Score = 28.6 bits (64), Expect = 0.74
Identities = 9/50 (18%), Positives = 28/50 (56%), Gaps = 1/50 (2%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
+A + F ++L R + +L+ ++ +W++ +++ + G P+N++
Sbjct: 3 VALYKFKPQENEDLEMRPGDKITLLDDSNE-DWWKGKIEDRVGFFPANFV 51
Score = 26.3 bits (58), Expect = 5.0
Identities = 12/21 (57%), Positives = 13/21 (61%)
Query: 338 ALYDFTPQEPGELEFRRDLKI 358
ALY F PQE +LE R KI
Sbjct: 4 ALYKFKPQENEDLEMRPGDKI 24
>gnl|CDD|198203 cd10340, SH2_N-SH2_SHP_like, N-terminal Src homology 2 (N-SH2)
domain found in SH2 domain Phosphatases (SHP) proteins.
The SH2 domain phosphatases (SHP-1, SHP-2/Syp,
Drosophila corkscrew (csw), and Caenorhabditis elegans
Protein Tyrosine Phosphatase (Ptp-2)) are cytoplasmic
signaling enzymes. They are both targeted and regulated
by interactions of their SH2 domains with
phosphotyrosine docking sites. These proteins contain
two SH2 domains (N-SH2, C-SH2) followed by a tyrosine
phosphatase (PTP) domain, and a C-terminal extension.
Shp1 and Shp2 have two tyrosyl phosphorylation sites in
their C-tails, which are phosphorylated differentially
by receptor and nonreceptor PTKs. Csw retains the
proximal tyrosine and Ptp-2 lacks both sites.
Shp-binding proteins include receptors, scaffolding
adapters, and inhibitory receptors. Some of these bind
both Shp1 and Shp2 while others bind only one. Most
proteins that bind a Shp SH2 domain contain one or more
immuno-receptor tyrosine-based inhibitory motifs
(ITIMs): [IVL]xpYxx[IVL]. Shp1 N-SH2 domain blocks the
catalytic domain and keeps the enzyme in the inactive
conformation, and is thus believed to regulate the
phosphatase activity of SHP-1. Its C-SH2 domain is
thought to be involved in searching for phosphotyrosine
activators. The SHP2 N-SH2 domain is a conformational
switch; it either binds and inhibits the phosphatase, or
it binds phosphoproteins and activates the enzyme. The
C-SH2 domain contributes binding energy and specificity,
but it does not have a direct role in activation. Csw
SH2 domain function is essential, but either SH2 domain
can fulfill this requirement. The role of the csw SH2
domains during Sevenless receptor tyrosine kinase (SEV)
signaling is to bind Daughter of Sevenless rather than
activated SEV. Ptp-2 acts in oocytes downstream of
sheath/oocyte gap junctions to promote major sperm
protein (MSP)-induced MAP Kinase (MPK-1)
phosphorylation. Ptp-2 functions in the oocyte
cytoplasm, not at the cell surface to inhibit multiple
RasGAPs, resulting in sustained Ras activation. It is
thought that MSP triggers PTP-2/Ras activation and ROS
production to stimulate MPK-1 activity essential for
oocyte maturation and that secreted MSP domains and
Cu/Zn superoxide dismutases function antagonistically to
control ROS and MAPK signaling. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 99
Score = 64.0 bits (156), Expect = 6e-13
Identities = 31/78 (39%), Positives = 50/78 (64%), Gaps = 5/78 (6%)
Query: 60 WYYGRITRADAERLLSNKHE-GAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFF 118
W++ I+ +AE LL + G+FL R S+S+PGDF+LSV+ D V H K+ ++G ++
Sbjct: 2 WFHPVISGIEAENLLKTRGVDGSFLARPSKSNPGDFTLSVRRGDEVTHIKI--QNTGDYY 59
Query: 119 LWVV--KFNSLNELVEYH 134
KF +L+ELV+Y+
Sbjct: 60 DLYGGEKFATLSELVQYY 77
Score = 64.0 bits (156), Expect = 6e-13
Identities = 31/78 (39%), Positives = 50/78 (64%), Gaps = 5/78 (6%)
Query: 239 WYYGRITRADAERLLSNKHE-GAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFF 297
W++ I+ +AE LL + G+FL R S+S+PGDF+LSV+ D V H K+ ++G ++
Sbjct: 2 WFHPVISGIEAENLLKTRGVDGSFLARPSKSNPGDFTLSVRRGDEVTHIKI--QNTGDYY 59
Query: 298 LWVV--KFNSLNELVEYH 313
KF +L+ELV+Y+
Sbjct: 60 DLYGGEKFATLSELVQYY 77
>gnl|CDD|198255 cd10392, SH2_SHF, Src homology 2 domain found in SH2
domain-containing adapter protein F (SHF). SHF is
thought to play a role in PDGF-receptor signaling and
regulation of apoptosis. SHF is mainly expressed in
skeletal muscle, brain, liver, prostate, testis, ovary,
small intestine, and colon. SHF contains four putative
tyrosine phosphorylation sites and an SH2 domain. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 98
Score = 63.9 bits (155), Expect = 6e-13
Identities = 32/77 (41%), Positives = 47/77 (61%), Gaps = 2/77 (2%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
WY+G I+R DAE LL E ++L+R SE+S DFSLS+K S G H K+ R K+ L
Sbjct: 3 WYHGAISRTDAENLLRLCKEASYLVRNSETSKNDFSLSLKSSQGFMHMKLSRTKEHKYVL 62
Query: 120 W--VVKFNSLNELVEYH 134
F+S+ E++ ++
Sbjct: 63 GQNSPPFSSVPEIIHHY 79
Score = 63.9 bits (155), Expect = 6e-13
Identities = 32/77 (41%), Positives = 47/77 (61%), Gaps = 2/77 (2%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
WY+G I+R DAE LL E ++L+R SE+S DFSLS+K S G H K+ R K+ L
Sbjct: 3 WYHGAISRTDAENLLRLCKEASYLVRNSETSKNDFSLSLKSSQGFMHMKLSRTKEHKYVL 62
Query: 299 W--VVKFNSLNELVEYH 313
F+S+ E++ ++
Sbjct: 63 GQNSPPFSSVPEIIHHY 79
>gnl|CDD|198184 cd09930, SH2_cSH2_p85_like, C-terminal Src homology 2 (cSH2) domain
found in p85. Phosphoinositide 3-kinases (PI3Ks) are
essential for cell growth, migration, and survival.
p110, the catalytic subunit, is composed of an
adaptor-binding domain, a Ras-binding domain, a C2
domain, a helical domain, and a kinase domain. The
regulatory unit is called p85 and is composed of an SH3
domain, a RhoGap domain, a N-terminal SH2 (nSH2) domain,
a inter SH2 (iSH2) domain, and C-terminal (cSH2) domain.
There are 2 inhibitory interactions between p110alpha
and p85 of P13K: 1) p85 nSH2 domain with the C2,
helical, and kinase domains of p110alpha and 2) p85 iSH2
domain with C2 domain of p110alpha. There are 3
inhibitory interactions between p110beta and p85 of
P13K: 1) p85 nSH2 domain with the C2, helical, and
kinase domains of p110beta, 2) p85 iSH2 domain with C2
domain of p110alpha, and 3) p85 cSH2 domain with the
kinase domain of p110alpha. It is interesting to note
that p110beta is oncogenic as a wild type protein while
p110alpha lacks this ability. One explanation is the
idea that the regulation of p110beta by p85 is unique
because of the addition of inhibitory contacts from the
cSH2 domain and the loss of contacts in the iSH2 domain.
In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 104
Score = 64.0 bits (156), Expect = 7e-13
Identities = 31/88 (35%), Positives = 47/88 (53%), Gaps = 6/88 (6%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
W G I R AE LL K +G FLIR S S+ G ++ SV C+ V+H + + +G +
Sbjct: 8 WLVGDINRTQAEELLRGKPDGTFLIRES-STQGCYACSVVCNGEVKHCVIYKTETG--YG 64
Query: 120 WVVKFN---SLNELVEYHRTASVSRSQD 144
+ +N SL ELV ++ S+ + D
Sbjct: 65 FAEPYNLYESLKELVLHYAHNSLEQHND 92
Score = 64.0 bits (156), Expect = 7e-13
Identities = 31/88 (35%), Positives = 47/88 (53%), Gaps = 6/88 (6%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
W G I R AE LL K +G FLIR S S+ G ++ SV C+ V+H + + +G +
Sbjct: 8 WLVGDINRTQAEELLRGKPDGTFLIRES-STQGCYACSVVCNGEVKHCVIYKTETG--YG 64
Query: 299 WVVKFN---SLNELVEYHRTASVSRSQD 323
+ +N SL ELV ++ S+ + D
Sbjct: 65 FAEPYNLYESLKELVLHYAHNSLEQHND 92
>gnl|CDD|198190 cd09937, SH2_csk_like, Src homology 2 (SH2) domain found in
Carboxyl-Terminal Src Kinase (Csk). Both the C-terminal
Src kinase (CSK) and CSK-homologous kinase (CHK) are
members of the CSK-family of protein tyrosine kinases.
These proteins suppress activity of Src-family kinases
(SFK) by selectively phosphorylating the conserved
C-terminal tail regulatory tyrosine by a similar
mechanism. CHK is also capable of inhibiting SFKs by a
non-catalytic mechanism that involves binding of CHK to
SFKs to form stable protein complexes. The
unphosphorylated form of SFKs is inhibited by CSK and
CHK by a two-step mechanism. The first step involves the
formation of a complex of SFKs with CSK/CHK with the
SFKs in the complex are inactive. The second step,
involves the phosphorylation of the C-terminal tail
tyrosine of SFKs, which then dissociates and adopt an
inactive conformation. The structural basis of how the
phosphorylated SFKs dissociate from CSK/CHK to adopt the
inactive conformation is not known. The inactive
conformation of SFKs is stabilized by two intramolecular
inhibitory interactions: (a) the pYT:SH2 interaction in
which the phosphorylated C-terminal tail tyrosine (YT)
binds to the SH2 domain, and (b) the linker:SH3
interaction of which the SH2-kinase domain linker binds
to the SH3 domain. SFKs are activated by multiple
mechanisms including binding of the ligands to the SH2
and SH3 domains to displace the two inhibitory
intramolecular interactions, autophosphorylation, and
dephosphorylation of YT. By selective phosphorylation
and the non-catalytic inhibitory mechanism CSK and CHK
are able to inhibit the active forms of SFKs. CSK and
CHK are regulated by phosphorylation and inter-domain
interactions. They both contain SH3, SH2, and kinase
domains separated by the SH3-SH2 connector and SH2
kinase linker, intervening segments separating the three
domains. They lack a conserved tyrosine phosphorylation
site in the kinase domain and the C-terminal tail
regulatory tyrosine phosphorylation site. The CSK SH2
domain is crucial for stabilizing the kinase domain in
the active conformation. A disulfide bond here regulates
CSK kinase activity. The subcellular localization and
activity of CSK are regulated by its SH2 domain. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 98
Score = 63.8 bits (156), Expect = 7e-13
Identities = 30/79 (37%), Positives = 50/79 (63%), Gaps = 6/79 (7%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
W++G+I+R +AERLL +G FL+R S + PGD++L V V+H++V+ +GK L
Sbjct: 5 WFHGKISREEAERLLQPPEDGLFLVRESTNYPGDYTLCVSFEGKVEHYRVIY-RNGK--L 61
Query: 120 WV---VKFNSLNELVEYHR 135
+ F +L +LVE++
Sbjct: 62 TIDEEEYFENLIQLVEHYT 80
Score = 63.8 bits (156), Expect = 7e-13
Identities = 30/79 (37%), Positives = 50/79 (63%), Gaps = 6/79 (7%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
W++G+I+R +AERLL +G FL+R S + PGD++L V V+H++V+ +GK L
Sbjct: 5 WFHGKISREEAERLLQPPEDGLFLVRESTNYPGDYTLCVSFEGKVEHYRVIY-RNGK--L 61
Query: 299 WV---VKFNSLNELVEYHR 314
+ F +L +LVE++
Sbjct: 62 TIDEEEYFENLIQLVEHYT 80
>gnl|CDD|212715 cd11781, SH3_Sorbs_1, First Src Homology 3 domain of Sorbin and SH3
domain containing (Sorbs) proteins and similar domains.
This family, also called the vinexin family, is composed
predominantly of adaptor proteins containing one sorbin
homology (SoHo) and three SH3 domains. Members include
the first SH3 domains of Sorbs1 (or ponsin), Sorbs2 (or
ArgBP2), Vinexin (or Sorbs3), and similar domains. They
are involved in the regulation of cytoskeletal
organization, cell adhesion, and growth factor
signaling. Members of this family bind multiple partners
including signaling molecules like c-Abl, c-Arg, Sos,
and c-Cbl, as well as cytoskeletal molecules such as
vinculin and afadin. They may have overlapping
functions. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 62.4 bits (152), Expect = 8e-13
Identities = 20/48 (41%), Positives = 31/48 (64%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
ALY F Q EL ++GD+I + + D++W+ GE R G+FPA+Y+
Sbjct: 4 ALYPFKAQSAKELSLKKGDIIYIRRQIDKNWYEGEHNGRVGIFPASYV 51
Score = 46.9 bits (112), Expect = 2e-07
Identities = 19/54 (35%), Positives = 33/54 (61%), Gaps = 1/54 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
+A A + F A + ELS +K ++ I + D NWY E +G+ G+ P++Y+E+
Sbjct: 1 KARALYPFKAQSAKELSLKKGDIIYIRR-QIDKNWYEGEHNGRVGIFPASYVEI 53
Score = 28.1 bits (63), Expect = 1.1
Identities = 9/26 (34%), Positives = 12/26 (46%)
Query: 338 ALYDFTPQEPGELEFRRDLKIKRRKS 363
ALY F Q EL ++ I R+
Sbjct: 4 ALYPFKAQSAKELSLKKGDIIYIRRQ 29
>gnl|CDD|212772 cd11838, SH3_Intersectin_3, Third Src homology 3 domain (or SH3C)
of Intersectin. Intersectins (ITSNs) are adaptor
proteins that function in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction.
They are essential for initiating clathrin-coated pit
formation. They bind to many proteins through their
multidomain structure and facilitate the assembly of
multimeric complexes. Vertebrates contain two ITSN
proteins, ITSN1 and ITSN2, which exist in alternatively
spliced short and long isoforms. The short isoforms
contain two Eps15 homology domains (EH1 and EH2), a
coiled-coil region and five SH3 domains (SH3A-E), while
the long isoforms, in addition, contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin homology (PH)
and C2 domains. ITSN1 and ITSN2 are both widely
expressed, with variations depending on tissue type and
stage of development. The third SH3 domain (or SH3C) of
ITSN1 has been shown to bind many proteins including
dynamin1/2, CIN85, c-Cbl, SHIP2, Reps1, synaptojanin-1,
and WNK, among others. The SH3C of ITSN2 has been shown
to bind the K15 protein of Kaposi's sarcoma-associated
herpesvirus. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 61.7 bits (150), Expect = 1e-12
Identities = 25/49 (51%), Positives = 31/49 (63%), Gaps = 1/49 (2%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
ALY + EPG+L F GDVI VT + D WW G IG R G+FP+ Y+
Sbjct: 3 IALYPYESNEPGDLTFNAGDVILVT-KKDGEWWTGTIGDRTGIFPSNYV 50
Score = 30.1 bits (68), Expect = 0.18
Identities = 14/50 (28%), Positives = 25/50 (50%), Gaps = 2/50 (4%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
IA + + + +L+F V IL + D W+ + + G+ PSNY+
Sbjct: 3 IALYPYESNEPGDLTFNAGDV--ILVTKKDGEWWTGTIGDRTGIFPSNYV 50
>gnl|CDD|212754 cd11820, SH3_STAM, Src homology 3 domain of Signal Transducing
Adaptor Molecules. STAMs were discovered as proteins
that are highly phosphorylated following cytokine and
growth factor stimulation. They function in cytokine
signaling and surface receptor degradation, as well as
regulate Golgi morphology. They associate with many
proteins including Jak2 and Jak3 tyrosine kinases, Hrs,
AMSH, and UBPY. STAM adaptor proteins contain VHS
(Vps27, Hrs, STAM homology), ubiquitin interacting
(UIM), and SH3 domains. There are two vertebrate STAMs,
STAM1 and STAM2, which may be functionally redundant;
vertebrate STAMs contain ITAM motifs. They are part of
the endosomal sorting complex required for transport
(ESCRT-0). STAM2 deficiency in mice did not cause any
obvious abnormality, while STAM1 deficiency resulted in
growth retardation. Loss of both STAM1 and STAM2 in mice
proved lethal, indicating that STAMs are important for
embryonic development. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 61.7 bits (150), Expect = 1e-12
Identities = 25/50 (50%), Positives = 33/50 (66%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V+ALYDF E EL F+ G++ITV D SD +WW G +GLFPA ++
Sbjct: 3 VRALYDFEAAEDNELTFKAGEIITVLDDSDPNWWKGSNHRGEGLFPANFV 52
Score = 45.1 bits (107), Expect = 9e-07
Identities = 16/49 (32%), Positives = 32/49 (65%), Gaps = 1/49 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
A +DF A ++EL+F+ +++ +L+ + D NW++ EGL P+N++
Sbjct: 5 ALYDFEAAEDNELTFKAGEIITVLD-DSDPNWWKGSNHRGEGLFPANFV 52
>gnl|CDD|198228 cd10365, SH2_Src_Src, Src homology 2 (SH2) domain found in tyrosine
kinase sarcoma (Src). Src is a member of the Src
non-receptor type tyrosine kinase family of proteins.
Src is thought to play a role in the regulation of
embryonic development and cell growth. Members here
include v-Src and c-Src. v-Src lacks the C-terminal
inhibitory phosphorylation site and is therefore
constitutively active as opposed to normal cellular src
(c-Src) which is only activated under certain
circumstances where it is required (e.g. growth factor
signaling). v-Src is an oncogene whereas c-Src is a
proto-oncogene. c-Src consists of three domains, an
N-terminal SH3 domain, a central SH2 domain and a
tyrosine kinase domain. The SH2 and SH3 domains work
together in the auto-inhibition of the kinase domain.
The phosphorylation of an inhibitory tyrosine near the
c-terminus of the protein produces a binding site for
the SH2 domain which then facilitates binding of the SH3
domain to a polyproline site within the linker between
the SH2 domain and the kinase domain. Binding of the SH3
domain inactivates the enzyme. This allows for multiple
mechanisms for c-Src activation: dephosphorylation of
the C-terminal tyrosine by a protein tyrosine
phosphatase, binding of the SH2 domain by a competitive
phospho-tyrosine residue, or competitive binding of a
polyproline binding site to the SH3 domain. Unlike most
other Src members Src lacks cysteine residues in the SH4
domain that undergo palmitylation. Serine and threonine
phosphorylation sites have also been identified in the
unique domains of Src and are believed to modulate
protein-protein interactions or regulate catalytic
activity. Alternatively spliced forms of Src, which
contain 6- or 11-amino acid insertions in the SH3
domain, are expressed in CNS neurons. c-Src has a unique
N-terminal domain, an SH3 domain, an SH2 domain, a
kinase domain and a regulatory tail, as do the other
members of the family. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 62.8 bits (152), Expect = 2e-12
Identities = 35/85 (41%), Positives = 53/85 (62%), Gaps = 8/85 (9%)
Query: 59 DWYYGRITRADAERLLSN--KHEGAFLIRVSESSPGDFSLSVKCSDG-----VQHFKVLR 111
+WY+G+ITR ++ERLL N G FL+R SE++ G + LSV D V+H+K+ +
Sbjct: 4 EWYFGKITRRESERLLLNAENPRGTFLVRESETTKGAYCLSVSDFDNAKGLNVKHYKIRK 63
Query: 112 DSSGKFFLWV-VKFNSLNELVEYHR 135
SG F++ +FNSL +LV Y+
Sbjct: 64 LDSGGFYITSRTQFNSLQQLVAYYS 88
Score = 62.8 bits (152), Expect = 2e-12
Identities = 35/85 (41%), Positives = 53/85 (62%), Gaps = 8/85 (9%)
Query: 238 DWYYGRITRADAERLLSN--KHEGAFLIRVSESSPGDFSLSVKCSDG-----VQHFKVLR 290
+WY+G+ITR ++ERLL N G FL+R SE++ G + LSV D V+H+K+ +
Sbjct: 4 EWYFGKITRRESERLLLNAENPRGTFLVRESETTKGAYCLSVSDFDNAKGLNVKHYKIRK 63
Query: 291 DSSGKFFLWV-VKFNSLNELVEYHR 314
SG F++ +FNSL +LV Y+
Sbjct: 64 LDSGGFYITSRTQFNSLQQLVAYYS 88
>gnl|CDD|212762 cd11828, SH3_ARHGEF9_like, Src homology 3 domain of ARHGEF9-like
Rho guanine nucleotide exchange factors. Members of
this family contain a SH3 domain followed by RhoGEF
(also called Dbl-homologous or DH) and Pleckstrin
Homology (PH) domains. They include the Rho guanine
nucleotide exchange factors ARHGEF9, ASEF (also called
ARHGEF4), ASEF2, and similar proteins. GEFs activate
small GTPases by exchanging bound GDP for free GTP.
ARHGEF9 specifically activates Cdc42, while both ASEF
and ASEF2 can activate Rac1 and Cdc42. ARHGEF9 is highly
expressed in the brain and it interacts with gephyrin, a
postsynaptic protein associated with GABA and glycine
receptors. ASEF plays a role in angiogenesis and cell
migration. ASEF2 is important in cell migration and
adhesion dynamics. ASEF exists in an autoinhibited form
and is activated upon binding of the tumor suppressor
APC (adenomatous polyposis coli), leading to the
activation of Rac1 or Cdc42. In its autoinhibited form,
the SH3 domain of ASEF forms an extensive interface with
the DH and PH domains, blocking the Rac binding site.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 60.5 bits (147), Expect = 3e-12
Identities = 24/51 (47%), Positives = 33/51 (64%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
L +AL+D +P EL F+ GDVI V D SD+ WW G I +G FPA+++
Sbjct: 1 LAEALWDHVTMDPEELGFKAGDVIEVLDMSDKDWWWGSIRDEEGWFPASFV 51
Score = 35.8 bits (83), Expect = 0.002
Identities = 14/51 (27%), Positives = 28/51 (54%), Gaps = 1/51 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
A A D +EL F+ V+++L+M D +W+ + +EG P++++
Sbjct: 2 AEALWDHVTMDPEELGFKAGDVIEVLDMSDK-DWWWGSIRDEEGWFPASFV 51
>gnl|CDD|212861 cd11928, SH3_SH3RF3_1, First Src Homology 3 domain of SH3 domain
containing ring finger 3, an E3 ubiquitin-protein
ligase. SH3RF3 is also called POSH2 (Plenty of SH3s 2)
or SH3MD4 (SH3 multiple domains protein 4). It is a
scaffold protein with E3 ubiquitin-protein ligase
activity. It was identified in the screen for
interacting partners of p21-activated kinase 2 (PAK2).
It may play a role in regulating JNK mediated apoptosis
in certain conditions. It also interacts with GTP-loaded
Rac1. SH3RF3 is highly homologous to SH3RF1; it also
contains an N-terminal RING finger domain and four SH3
domains. This model represents the first SH3 domain,
located at the N-terminal half, of SH3RF3. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 60.3 bits (146), Expect = 4e-12
Identities = 21/49 (42%), Positives = 35/49 (71%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ALY + +EPG+L+F +GD+I + + D++W+HGE+ G PA+YI
Sbjct: 4 KALYSYEGKEPGDLKFNKGDIIILRRKVDENWYHGELNGCHGFLPASYI 52
Score = 36.8 bits (85), Expect = 8e-04
Identities = 16/40 (40%), Positives = 25/40 (62%), Gaps = 1/40 (2%)
Query: 16 ELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
+L F K ++ IL + D NWY EL+G G +P++YI+
Sbjct: 16 DLKFNKGDII-ILRRKVDENWYHGELNGCHGFLPASYIQC 54
Score = 28.7 bits (64), Expect = 0.63
Identities = 13/27 (48%), Positives = 20/27 (74%), Gaps = 1/27 (3%)
Query: 337 QALYDFTPQEPGELEFRR-DLKIKRRK 362
+ALY + +EPG+L+F + D+ I RRK
Sbjct: 4 KALYSYEGKEPGDLKFNKGDIIILRRK 30
>gnl|CDD|212755 cd11821, SH3_ASAP, Src homology 3 domain of ArfGAP with SH3 domain,
ankyrin repeat and PH domain containing proteins. ASAPs
are Arf GTPase activating proteins (GAPs) and they
function in regulating cell growth, migration, and
invasion. They contain an N-terminal BAR domain,
followed by a Pleckstrin homology (PH) domain, an Arf
GAP domain, ankyrin (ANK) repeats, and a C-terminal SH3
domain. Vertebrates contain at least three members,
ASAP1, ASAP2, and ASAP3, but some ASAP3 proteins do not
seem to harbor a C-terminal SH3 domain. ASAP1 and ASAP2
show GTPase activating protein (GAP) activity towards
Arf1 and Arf5. They do not show GAP activity towards
Arf6, but are able to mediate Arf6 signaling by binding
stably to GTP-Arf6. ASAP3 is an Arf6-specific GAP. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 60.0 bits (146), Expect = 5e-12
Identities = 21/52 (40%), Positives = 29/52 (55%), Gaps = 3/52 (5%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEI---GARKGLFPATY 205
V+ALYD EL F G++I VT D WW G I +R+G+FP ++
Sbjct: 2 VRALYDCQADNDDELTFSEGEIIVVTGEEDDEWWEGHIEGDPSRRGVFPVSF 53
Score = 33.1 bits (76), Expect = 0.015
Identities = 14/51 (27%), Positives = 28/51 (54%), Gaps = 4/51 (7%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGK---EGLIPSNY 52
A +D A +DEL+F + +++ + EDD W+ ++G G+ P ++
Sbjct: 4 ALYDCQADNDDELTFSEGEIIVVTGEEDD-EWWEGHIEGDPSRRGVFPVSF 53
>gnl|CDD|198253 cd10390, SH2_SHD, Src homology 2 domain found in SH2
domain-containing adapter proteins D (SHD). The
expression of SHD is restricted to the brain. SHD may be
a physiological substrate of c-Abl and may function as
an adapter protein in the central nervous system. It is
also thought to be involved in apoptotic regulation. SHD
contains five YXXP motifs, a substrate sequence
preferred by Abl tyrosine kinases, in addition to a
poly-proline rich region and a C-terminal SH2 domain. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 98
Score = 61.3 bits (148), Expect = 5e-12
Identities = 32/79 (40%), Positives = 48/79 (60%), Gaps = 2/79 (2%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
W++G ++RADAE LLS EG++L+R+SE+ P D SLS++ S G H K R + L
Sbjct: 3 WFHGPLSRADAENLLSLCKEGSYLVRLSETRPQDCSLSLRSSQGFLHLKFARTRENQVVL 62
Query: 120 WVVK--FNSLNELVEYHRT 136
F S+ ELV ++ +
Sbjct: 63 GQHSGPFPSVPELVLHYSS 81
Score = 61.3 bits (148), Expect = 5e-12
Identities = 32/79 (40%), Positives = 48/79 (60%), Gaps = 2/79 (2%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
W++G ++RADAE LLS EG++L+R+SE+ P D SLS++ S G H K R + L
Sbjct: 3 WFHGPLSRADAENLLSLCKEGSYLVRLSETRPQDCSLSLRSSQGFLHLKFARTRENQVVL 62
Query: 299 WVVK--FNSLNELVEYHRT 315
F S+ ELV ++ +
Sbjct: 63 GQHSGPFPSVPELVLHYSS 81
>gnl|CDD|198215 cd10352, SH2_a2chimerin_b2chimerin, Src homology 2 (SH2) domain
found in alpha2-chimerin and beta2-chimerin proteins.
Chimerins are a family of phorbol ester- and
diacylglycerol-responsive GTPase-activating proteins.
Alpha1-chimerin (formerly known as n-chimerin) and
alpha2-chimerin are alternatively spliced products of a
single gene, as are beta1- and beta2-chimerin. alpha1-
and beta1-chimerin have a relatively short N-terminal
region that does not encode any recognizable domains,
whereas alpha2- and beta2-chimerin both include a
functional SH2 domain that can bind to phosphotyrosine
motifs within receptors. All of the isoforms contain a
GAP domain with specificity in vitro for Rac1 and a
diacylglycerol (DAG)-binding C1 domain which allows them
to translocate to membranes in response to DAG signaling
and anchors them in close proximity to activated Rac.
Other C1 domain-containing diacylglycerol receptors
including: PKC, Munc-13 proteins, phorbol ester binding
scaffolding proteins involved in Ca2+-stimulated
exocytosis, and RasGRPs, diacylglycerol-activated
guanine-nucleotide exchange factors (GEFs) for Ras and
Rap1. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 91
Score = 60.8 bits (148), Expect = 6e-12
Identities = 24/73 (32%), Positives = 48/73 (65%), Gaps = 3/73 (4%)
Query: 61 YYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFLW 120
Y+G I+R +AE+LLS +G++LIR S G ++LS++ + V+++K+ D + +
Sbjct: 9 YHGLISREEAEQLLSGASDGSYLIRESSRDDGYYTLSLRFNGKVKNYKLYYD-GKNHYHY 67
Query: 121 VV--KFNSLNELV 131
V +F+++++LV
Sbjct: 68 VGEKRFDTIHDLV 80
Score = 60.8 bits (148), Expect = 6e-12
Identities = 24/73 (32%), Positives = 48/73 (65%), Gaps = 3/73 (4%)
Query: 240 YYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFLW 299
Y+G I+R +AE+LLS +G++LIR S G ++LS++ + V+++K+ D + +
Sbjct: 9 YHGLISREEAEQLLSGASDGSYLIRESSRDDGYYTLSLRFNGKVKNYKLYYD-GKNHYHY 67
Query: 300 VV--KFNSLNELV 310
V +F+++++LV
Sbjct: 68 VGEKRFDTIHDLV 80
>gnl|CDD|198214 cd10351, SH2_SH2D4B, Src homology 2 domain found in the SH2 domain
containing protein 4B (SH2D4B). SH2D4B contains a
single SH2 domain. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 61.1 bits (148), Expect = 7e-12
Identities = 35/87 (40%), Positives = 55/87 (63%), Gaps = 7/87 (8%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF-- 117
W++G I+R +AE LL N EG+FL+RVSE G ++LS + G +HF L D+SG F
Sbjct: 9 WFHGIISREEAEALLMNATEGSFLVRVSEKIWG-YTLSYRLQSGFKHF--LVDASGDFYS 65
Query: 118 FLWV--VKFNSLNELVEYHRTASVSRS 142
FL V + +L +L+++H+ ++ S
Sbjct: 66 FLGVDPNRHATLTDLIDFHKEEIITTS 92
Score = 61.1 bits (148), Expect = 7e-12
Identities = 35/87 (40%), Positives = 55/87 (63%), Gaps = 7/87 (8%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF-- 296
W++G I+R +AE LL N EG+FL+RVSE G ++LS + G +HF L D+SG F
Sbjct: 9 WFHGIISREEAEALLMNATEGSFLVRVSEKIWG-YTLSYRLQSGFKHF--LVDASGDFYS 65
Query: 297 FLWV--VKFNSLNELVEYHRTASVSRS 321
FL V + +L +L+++H+ ++ S
Sbjct: 66 FLGVDPNRHATLTDLIDFHKEEIITTS 92
>gnl|CDD|219499 pfam07653, SH3_2, Variant SH3 domain. SH3 (Src homology 3) domains
are often indicative of a protein involved in signal
transduction related to cytoskeletal organisation. First
described in the Src cytoplasmic tyrosine kinase. The
structure is a partly opened beta barrel.
Length = 53
Score = 59.0 bits (144), Expect = 9e-12
Identities = 20/51 (39%), Positives = 33/51 (64%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ ++D+ +P EL ++GDV+ V D+ D WW GE G R+GL P++Y+
Sbjct: 1 YGRVIFDYVATDPNELSLKKGDVVKVLDKDDNGWWEGERGGRRGLVPSSYV 51
Score = 50.2 bits (121), Expect = 1e-08
Identities = 20/52 (38%), Positives = 33/52 (63%), Gaps = 1/52 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
D+ AT +ELS +K V+K+L+ +D+ W+ E G+ GL+PS+Y+E
Sbjct: 2 GRVIFDYVATDPNELSLKKGDVVKVLDKDDN-GWWEGERGGRRGLVPSSYVE 52
>gnl|CDD|198186 cd09932, SH2_C-SH2_PLC_gamma_like, C-terminal Src homology 2
(C-SH2) domain in Phospholipase C gamma. Phospholipase
C gamma is a signaling molecule that is recruited to the
C-terminal tail of the receptor upon autophosphorylation
of a highly conserved tyrosine. PLCgamma is composed of
a Pleckstrin homology (PH) domain followed by an
elongation factor (EF) domain, 2 catalytic regions of
PLC domains that flank 2 tandem SH2 domains (N-SH2,
C-SH2), and ending with a SH3 domain and C2 domain.
N-SH2 SH2 domain-mediated interactions represent a
crucial step in transmembrane signaling by receptor
tyrosine kinases. SH2 domains recognize phosphotyrosine
(pY) in the context of particular sequence motifs in
receptor phosphorylation sites. Both N-SH2 and C-SH2
have a very similar binding affinity to pY. But in
growth factor stimulated cells these domains bind to
different target proteins. N-SH2 binds to pY containing
sites in the C-terminal tails of tyrosine kinases and
other receptors. Recently it has been shown that this
interaction is mediated by phosphorylation-independent
interactions between a secondary binding site found
exclusively on the N-SH2 domain and a region of the
FGFR1 tyrosine kinase domain. This secondary site on the
SH2 cooperates with the canonical pY site to regulate
selectivity in mediating a specific cellular process.
C-SH2 binds to an intramolecular site on PLCgamma itself
which allows it to hydrolyze
phosphatidylinositol-4,5-bisphosphate into
diacylglycerol and inositol triphosphate. These then
activate protein kinase C and release calcium. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 104
Score = 60.7 bits (148), Expect = 1e-11
Identities = 34/102 (33%), Positives = 58/102 (56%), Gaps = 6/102 (5%)
Query: 57 NHDWYYGRITRADAERLLSN-KHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSG 115
+ +W++ +TR AE +L +GAFL+R SE+ P F++S + ++H ++ ++ G
Sbjct: 3 SKEWFHANLTREQAEEMLMRVPRDGAFLVRPSETDPNSFAISFRAEGKIKHCRIKQE--G 60
Query: 116 KFF-LWVVKFNSLNELVEYHRTASVSRSQDVKLRDMVPEECL 156
+ F + +F SL ELV Y+ + R +KLR V EE L
Sbjct: 61 RLFVIGTSQFESLVELVSYYEKHPLYRK--IKLRYPVNEELL 100
Score = 60.7 bits (148), Expect = 1e-11
Identities = 34/102 (33%), Positives = 58/102 (56%), Gaps = 6/102 (5%)
Query: 236 NHDWYYGRITRADAERLLSN-KHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSG 294
+ +W++ +TR AE +L +GAFL+R SE+ P F++S + ++H ++ ++ G
Sbjct: 3 SKEWFHANLTREQAEEMLMRVPRDGAFLVRPSETDPNSFAISFRAEGKIKHCRIKQE--G 60
Query: 295 KFF-LWVVKFNSLNELVEYHRTASVSRSQDVKLRDMVPEECL 335
+ F + +F SL ELV Y+ + R +KLR V EE L
Sbjct: 61 RLFVIGTSQFESLVELVSYYEKHPLYRK--IKLRYPVNEELL 100
>gnl|CDD|198254 cd10391, SH2_SHE, Src homology 2 domain found in SH2
domain-containing adapter protein E (SHE). SHE is
expressed in heart, lung, brain, and skeletal muscle.
SHE contains two pTry protein binding domains, protein
interaction domain (PID) and a SH2 domain, followed by a
glycine-proline rich region, all of which are N-terminal
to the phosphotyrosine binding (PTB) domain. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 98
Score = 60.4 bits (146), Expect = 1e-11
Identities = 28/80 (35%), Positives = 44/80 (55%), Gaps = 2/80 (2%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
WY+G I+RA+AE L E ++L+R SES +S+++K S G H V + K+ L
Sbjct: 3 WYHGSISRAEAESRLQPCKEASYLVRNSESGNSKYSIALKTSQGCVHIIVAQTKDNKYTL 62
Query: 120 WVVK--FNSLNELVEYHRTA 137
F+S+ E+V Y+
Sbjct: 63 NQTSAVFDSIPEVVHYYSNE 82
Score = 60.4 bits (146), Expect = 1e-11
Identities = 28/80 (35%), Positives = 44/80 (55%), Gaps = 2/80 (2%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
WY+G I+RA+AE L E ++L+R SES +S+++K S G H V + K+ L
Sbjct: 3 WYHGSISRAEAESRLQPCKEASYLVRNSESGNSKYSIALKTSQGCVHIIVAQTKDNKYTL 62
Query: 299 WVVK--FNSLNELVEYHRTA 316
F+S+ E+V Y+
Sbjct: 63 NQTSAVFDSIPEVVHYYSNE 82
>gnl|CDD|212897 cd11964, SH3_STAM1, Src homology 3 domain of Signal Transducing
Adaptor Molecule 1. STAM1 is part of the endosomal
sorting complex required for transport (ESCRT-0) and is
involved in sorting ubiquitinated cargo proteins from
the endosome. It may also be involved in the regulation
of IL2 and GM-CSF mediated signaling, and has been
implicated in neural cell survival. STAMs were
discovered as proteins that are highly phosphorylated
following cytokine and growth factor stimulation. They
function in cytokine signaling and surface receptor
degradation, as well as regulate Golgi morphology. They
associate with many proteins including Jak2 and Jak3
tyrosine kinases, Hrs, AMSH, and UBPY. STAM adaptor
proteins contain VHS (Vps27, Hrs, STAM homology),
ubiquitin interacting (UIM), and SH3 domains. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 59.2 bits (143), Expect = 1e-11
Identities = 24/50 (48%), Positives = 33/50 (66%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V+A+YDF E EL F+ GD+IT+ D SD +WW GE GLFP+ ++
Sbjct: 3 VRAIYDFEAAEDNELTFKAGDIITILDDSDPNWWKGETPQGTGLFPSNFV 52
Score = 41.1 bits (96), Expect = 3e-05
Identities = 18/49 (36%), Positives = 31/49 (63%), Gaps = 1/49 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
A +DF A ++EL+F+ ++ IL+ + D NW++ E GL PSN++
Sbjct: 5 AIYDFEAAEDNELTFKAGDIITILD-DSDPNWWKGETPQGTGLFPSNFV 52
>gnl|CDD|198199 cd09946, SH2_HSH2_like, Src homology 2 domain found in
hematopoietic SH2 (HSH2) protein. HSH2 is thought to
function as an adapter protein involved in tyrosine
kinase signaling. It may also be involved in regulating
cytokine signaling and cytoskeletal reorganization in
hematopoietic cells. HSH2 contains several putative
protein-binding motifs, SH3-binding proline-rich
regions, and phosphotyrosine sites, but lacks enzymatic
motifs. HSH2 was found to interact with
cytokine-regulated tyrosine kinase c-FES and an
activated Cdc42-associated tyrosine kinase ACK1. HSH2
binds c-FES through both its C-terminal region and its
N-terminal region including the SH2 domain and binds
ACK1 via its N-terminal proline-rich region. Both
kinases bound and tyrosine-phosphorylated HSH2 in
mammalian cells. In general SH2 domains are involved in
signal transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 102
Score = 60.3 bits (146), Expect = 1e-11
Identities = 30/79 (37%), Positives = 46/79 (58%), Gaps = 3/79 (3%)
Query: 59 DWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHF--KVLRDSSGK 116
+W++G I+R AE +L ++ G+FLIRVS S G ++LS K +HF K+L D +
Sbjct: 8 EWFHGAISREAAENMLESQPLGSFLIRVSHSHVG-YTLSYKAQSSCRHFMVKLLDDGTFM 66
Query: 117 FFLWVVKFNSLNELVEYHR 135
V SL+ LV +H+
Sbjct: 67 IPGEKVAHTSLHALVTFHQ 85
Score = 60.3 bits (146), Expect = 1e-11
Identities = 30/79 (37%), Positives = 46/79 (58%), Gaps = 3/79 (3%)
Query: 238 DWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHF--KVLRDSSGK 295
+W++G I+R AE +L ++ G+FLIRVS S G ++LS K +HF K+L D +
Sbjct: 8 EWFHGAISREAAENMLESQPLGSFLIRVSHSHVG-YTLSYKAQSSCRHFMVKLLDDGTFM 66
Query: 296 FFLWVVKFNSLNELVEYHR 314
V SL+ LV +H+
Sbjct: 67 IPGEKVAHTSLHALVTFHQ 85
>gnl|CDD|212860 cd11927, SH3_SH3RF1_1, First Src Homology 3 domain of SH3 domain
containing ring finger protein 1, an E3
ubiquitin-protein ligase. SH3RF1 is also called POSH
(Plenty of SH3s) or SH3MD2 (SH3 multiple domains protein
2). It is a scaffold protein that acts as an E3
ubiquitin-protein ligase. It plays a role in calcium
homeostasis through the control of the ubiquitin domain
protein Herp. It may also have a role in regulating
death receptor mediated and JNK mediated apoptosis.
SH3RF1 also enhances the ubiquitination of ROMK1
potassium channel resulting in its increased
endocytosis. It contains an N-terminal RING finger
domain and four SH3 domains. This model represents the
first SH3 domain, located at the N-terminal half, of
SH3RF1. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 58.8 bits (142), Expect = 1e-11
Identities = 19/49 (38%), Positives = 35/49 (71%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ALY++ +EPG+L+F +GD+I + + D++W+HGE+ G FP ++
Sbjct: 4 KALYNYEGKEPGDLKFSKGDIIILRRQVDENWYHGEVNGIHGFFPTNFV 52
Score = 37.6 bits (87), Expect = 4e-04
Identities = 16/53 (30%), Positives = 30/53 (56%), Gaps = 1/53 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
A A +++ +L F K ++ IL + D NWY E++G G P+N++++
Sbjct: 3 AKALYNYEGKEPGDLKFSKGDII-ILRRQVDENWYHGEVNGIHGFFPTNFVQI 54
Score = 27.6 bits (61), Expect = 1.7
Identities = 12/27 (44%), Positives = 21/27 (77%), Gaps = 1/27 (3%)
Query: 337 QALYDFTPQEPGELEFRR-DLKIKRRK 362
+ALY++ +EPG+L+F + D+ I RR+
Sbjct: 4 KALYNYEGKEPGDLKFSKGDIIILRRQ 30
>gnl|CDD|198281 cd10418, SH2_Src_Fyn_isoform_a_like, Src homology 2 (SH2) domain
found in Fyn isoform a like proteins. Fyn is a member
of the Src non-receptor type tyrosine kinase family of
proteins. This cd contains the SH2 domain found in Fyn
isoform a type proteins. Fyn is involved in the control
of cell growth and is required in the following
pathways: T and B cell receptor signaling,
integrin-mediated signaling, growth factor and cytokine
receptor signaling, platelet activation, ion channel
function, cell adhesion, axon guidance, fertilization,
entry into mitosis, and differentiation of natural
killer cells, oligodendrocytes and keratinocytes. The
protein associates with the p85 subunit of
phosphatidylinositol 3-kinase and interacts with the
Fyn-binding protein. Alternatively spliced transcript
variants encoding distinct isoforms exist. Fyn is
primarily localized to the cytoplasmic leaflet of the
plasma membrane. Tyrosine phosphorylation of target
proteins by Fyn serves to either regulate target protein
activity, and/or to generate a binding site on the
target protein that recruits other signaling molecules.
FYN has been shown to interact with a number of proteins
including: BCAR1, Cbl, Janus kinase, nephrin, Sky,
tyrosine kinase, Wiskott-Aldrich syndrome protein, and
Zap-70. Fyn has a unique N-terminal domain, an SH3
domain, an SH2 domain, a kinase domain and a regulatory
tail, as do the other members of the family. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 60.0 bits (145), Expect = 2e-11
Identities = 32/84 (38%), Positives = 54/84 (64%), Gaps = 8/84 (9%)
Query: 59 DWYYGRITRADAER-LLSNKH-EGAFLIRVSESSPGDFSLSVK-----CSDGVQHFKVLR 111
+WY+G++ R DAER LLS + G FLIR SE++ G +SLS++ D V+H+K+ +
Sbjct: 4 EWYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIRK 63
Query: 112 -DSSGKFFLWVVKFNSLNELVEYH 134
D+ G + +F +L +LV+++
Sbjct: 64 LDNGGYYITTRAQFETLQQLVQHY 87
Score = 60.0 bits (145), Expect = 2e-11
Identities = 32/84 (38%), Positives = 54/84 (64%), Gaps = 8/84 (9%)
Query: 238 DWYYGRITRADAER-LLSNKH-EGAFLIRVSESSPGDFSLSVK-----CSDGVQHFKVLR 290
+WY+G++ R DAER LLS + G FLIR SE++ G +SLS++ D V+H+K+ +
Sbjct: 4 EWYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIRK 63
Query: 291 -DSSGKFFLWVVKFNSLNELVEYH 313
D+ G + +F +L +LV+++
Sbjct: 64 LDNGGYYITTRAQFETLQQLVQHY 87
>gnl|CDD|198218 cd10355, SH2_DAPP1_BAM32_like, Src homology 2 domain found in dual
adaptor for phosphotyrosine and 3-phosphoinositides (
DAPP1)/B lymphocyte adaptor molecule of 32 kDa
(Bam32)-like proteins. DAPP1/Bam32 contains a putative
myristoylation site at its N-terminus, followed by a SH2
domain, and a pleckstrin homology (PH) domain at its
C-terminus. DAPP1 could potentially be recruited to the
cell membrane by any of these domains. Its putative
myristoylation site could facilitate the interaction of
DAPP1 with the lipid bilayer. Its SH2 domain may also
interact with phosphotyrosine residues on
membrane-associated proteins such as activated tyrosine
kinase receptors. And finally its PH domain exhibits a
high-affinity interaction with the PtdIns(3,4,5)P(3)
PtdIns(3,4)P(2) second messengers produced at the cell
membrane following the activation of PI 3-kinases. DAPP1
is thought to interact with both tyrosine phosphorylated
proteins and 3-phosphoinositides and therefore may play
a role in regulating the location and/or activity of
such proteins(s) in response to agonists that elevate
PtdIns(3,4,5)P(3) and PtdIns(3,4)P(2). This protein is
likely to play an important role in triggering signal
transduction pathways that lie downstream from receptor
tyrosine kinases and PI 3-kinase. It is likely that
DAPP1 functions as an adaptor to recruit other proteins
to the plasma membrane in response to extracellular
signals. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 92
Score = 59.4 bits (144), Expect = 2e-11
Identities = 31/81 (38%), Positives = 47/81 (58%), Gaps = 2/81 (2%)
Query: 54 EMKNHDWYYGRITRADAER-LLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRD 112
+++ WY+G +TR AE LLSN +G++L+R S G FSLSV+ D V+HF V
Sbjct: 2 LLQSLGWYHGNLTRHAAEALLLSNGVDGSYLLRNSNEGTGLFSLSVRAKDSVKHFHVEYT 61
Query: 113 SSGKFFLWVVKFNSLNELVEY 133
F +F+SL + V++
Sbjct: 62 GYS-FKFGFNEFSSLQDFVKH 81
Score = 59.4 bits (144), Expect = 2e-11
Identities = 31/81 (38%), Positives = 47/81 (58%), Gaps = 2/81 (2%)
Query: 233 EMKNHDWYYGRITRADAER-LLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRD 291
+++ WY+G +TR AE LLSN +G++L+R S G FSLSV+ D V+HF V
Sbjct: 2 LLQSLGWYHGNLTRHAAEALLLSNGVDGSYLLRNSNEGTGLFSLSVRAKDSVKHFHVEYT 61
Query: 292 SSGKFFLWVVKFNSLNELVEY 312
F +F+SL + V++
Sbjct: 62 GYS-FKFGFNEFSSLQDFVKH 81
>gnl|CDD|212928 cd11995, SH3_Intersectin1_5, Fifth Src homology 3 domain (or SH3E)
of Intersectin-1. Intersectin-1 (ITSN1) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN1 localizes in membranous organelles, CCPs, the
Golgi complex, and may be involved in the cell membrane
trafficking system. It exists in alternatively spliced
short and long isoforms. The short isoform contains two
Eps15 homology domains (EH1 and EH2), a coiled-coil
region and five SH3 domains (SH3A-E), while the long
isoform, in addition, contains RhoGEF (also called
Dbl-homologous or DH), Pleckstrin homology (PH) and C2
domains. The fifth SH3 domain (or SH3E) of ITSN1 has
been shown to bind many protein partners including
SGIP1, Sos1, dynamin1/2, CIN85, c-Cbl, SHIP2, N-WASP,
and synaptojanin-1, among others. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 54
Score = 58.0 bits (140), Expect = 3e-11
Identities = 22/52 (42%), Positives = 32/52 (61%)
Query: 155 CLVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
C V +YD+T Q EL F +G +I V ++ D WW GE+ + GLFP+ Y+
Sbjct: 1 CQVIGMYDYTAQNDDELAFSKGQIINVLNKEDPDWWKGELNGQVGLFPSNYV 52
Score = 55.7 bits (134), Expect = 1e-10
Identities = 23/54 (42%), Positives = 39/54 (72%), Gaps = 1/54 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
+ I +D+ A +DEL+F K Q++ +LN ED +W++ EL+G+ GL PSNY+++
Sbjct: 2 QVIGMYDYTAQNDDELAFSKGQIINVLNKEDP-DWWKGELNGQVGLFPSNYVKL 54
>gnl|CDD|198200 cd10337, SH2_BCAR3, Src homology 2 (SH2) domain in the Breast
Cancer Anti-estrogen Resistance protein 3. BCAR3 is
part of a growing family of guanine nucleotide exchange
factors is responsible for activation of Ras-family
GTPases, including Sos1 and 2, GRF1 and 2,
CalDAG-GEF/GRP1-4, C3G, cAMP-GEF/Epac 1 and 2, PDZ-GEFs,
MR-GEF, RalGDS family members, RalGPS, RasGEF, Smg GDS,
and phospholipase C(epsilon). 12102558 21262352 BCAR3
binds to the carboxy-terminus of BCAR1/p130Cas, a focal
adhesion adapter protein. Over expression of BCAR1
(p130Cas) and BCAR3 induces estrogen independent growth
in normally estrogen-dependent cell lines. They have
been linked to resistance to anti-estrogens in breast
cancer, Rac activation, and cell motility, though the
BCAR3/p130Cas complex is not required for this activity
in BCAR3. Many BCAR3-mediated signaling events in
epithelial and mesenchymal cells are independent of
p130Cas association. Structurally these proteins contain
a single SH2 domain upstream of their RasGEF domain,
which is responsible for the ability of BCAR3 to enhance
p130Cas over-expression-induced migration. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 136
Score = 60.4 bits (147), Expect = 3e-11
Identities = 26/62 (41%), Positives = 37/62 (59%), Gaps = 2/62 (3%)
Query: 54 EMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDS 113
++++H WY+GRI R AE L+ EG FL+R S SSPGD+ L+ + HFK+ R
Sbjct: 2 DLRSHAWYHGRIPRQVAESLVQR--EGDFLVRDSLSSPGDYVLTCRWKGQPLHFKINRVV 59
Query: 114 SG 115
Sbjct: 60 LR 61
Score = 60.4 bits (147), Expect = 3e-11
Identities = 26/62 (41%), Positives = 37/62 (59%), Gaps = 2/62 (3%)
Query: 233 EMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDS 292
++++H WY+GRI R AE L+ EG FL+R S SSPGD+ L+ + HFK+ R
Sbjct: 2 DLRSHAWYHGRIPRQVAESLVQR--EGDFLVRDSLSSPGDYVLTCRWKGQPLHFKINRVV 59
Query: 293 SG 294
Sbjct: 60 LR 61
>gnl|CDD|198178 cd09923, SH2_SOCS_family, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) family. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 81
Score = 58.4 bits (142), Expect = 3e-11
Identities = 30/79 (37%), Positives = 44/79 (55%), Gaps = 6/79 (7%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
WY+G ITR +AE LL+ K EG FL+R S S FS+S + H ++ S+G+F
Sbjct: 2 WYWGGITRYEAEELLAGKPEGTFLVRDSSDSRYLFSVSFRTYGRTLHARIEY-SNGRFSF 60
Query: 120 W-----VVKFNSLNELVEY 133
V +F + EL+E+
Sbjct: 61 DSSDPSVPRFPCVVELIEH 79
Score = 58.4 bits (142), Expect = 3e-11
Identities = 30/79 (37%), Positives = 44/79 (55%), Gaps = 6/79 (7%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
WY+G ITR +AE LL+ K EG FL+R S S FS+S + H ++ S+G+F
Sbjct: 2 WYWGGITRYEAEELLAGKPEGTFLVRDSSDSRYLFSVSFRTYGRTLHARIEY-SNGRFSF 60
Query: 299 W-----VVKFNSLNELVEY 312
V +F + EL+E+
Sbjct: 61 DSSDPSVPRFPCVVELIEH 79
>gnl|CDD|212918 cd11985, SH3_Stac2_C, C-terminal Src homology 3 domain of SH3 and
cysteine-rich domain-containing protein 2 (Stac2). Stac
proteins are putative adaptor proteins that contain a
cysteine-rich C1 domain and one or two SH3 domains at
the C-terminus. There are three mammalian members
(Stac1, Stac2, and Stac3) of this family. Stac2 contains
a single SH3 domain at the C-terminus unlike Stac1 and
Stac3, which contain two C-terminal SH3 domains. Stac1
and Stac2 have been found to be expressed differently in
mature dorsal root ganglia (DRG) neurons. Stac1 is
mainly expressed in peptidergic neurons while Stac2 is
found in a subset of nonpeptidergic and all trkB+
neurons. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 57.6 bits (139), Expect = 3e-11
Identities = 22/48 (45%), Positives = 30/48 (62%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
ALY F PQE +L + GD + V D S++ WW G+ G R G FPA ++
Sbjct: 4 ALYKFLPQENNDLPLQPGDRVMVVDDSNEDWWKGKSGDRVGFFPANFV 51
>gnl|CDD|212760 cd11826, SH3_Abi, Src homology 3 domain of Abl Interactor proteins.
Abl interactor (Abi) proteins are adaptor proteins
serving as binding partners and substrates of Abl
tyrosine kinases. They are involved in regulating actin
cytoskeletal reorganization and play important roles in
membrane-ruffling, endocytosis, cell motility, and cell
migration. They localize to sites of actin
polymerization in epithelial adherens junction and
immune synapses, as well as to the leading edge of
lamellipodia. Vertebrates contain two Abi proteins, Abi1
and Abi2. Abi1 displays a wide expression pattern while
Abi2 is highly expressed in the eye and brain. Abi
proteins contain a homeobox homology domain, a
proline-rich region, and a SH3 domain. The SH3 domain of
Abi binds to a PxxP motif in Abl. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 52
Score = 57.3 bits (139), Expect = 4e-11
Identities = 22/50 (44%), Positives = 31/50 (62%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V ALYD+T + EL F+ GD+I VT ++D W+ G + GLFP Y+
Sbjct: 2 VVALYDYTADKDDELSFQEGDIIYVTKKNDDGWYEGVLNGVTGLFPGNYV 51
Score = 47.7 bits (114), Expect = 9e-08
Identities = 20/51 (39%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
+A +D+ A +DELSF++ ++ + DD WY L+G GL P NY+E
Sbjct: 3 VALYDYTADKDDELSFQEGDIIYVTKKNDD-GWYEGVLNGVTGLFPGNYVE 52
>gnl|CDD|198179 cd09925, SH2_SHC, Src homology 2 (SH2) domain found in SH2 adaptor
protein C (SHC). SHC is involved in a wide variety of
pathways including regulating proliferation,
angiogenesis, invasion and metastasis, and bone
metabolism. An adapter protein, SHC has been implicated
in Ras activation following the stimulation of a number
of different receptors, including growth factors
[insulin, epidermal growth factor (EGF), nerve growth
factor, and platelet derived growth factor (PDGF)],
cytokines [interleukins 2, 3, and 5], erythropoietin,
and granulocyte/macrophage colony-stimulating factor,
and antigens [T-cell and B-cell receptors]. SHC has been
shown to bind to tyrosine-phosphorylated receptors, and
receptor stimulation leads to tyrosine phosphorylation
of SHC. Upon phosphorylation, SHC interacts with another
adapter protein, Grb2, which binds to the Ras GTP/GDP
exchange factor mSOS which leads to Ras activation. SHC
is composed of an N-terminal domain that interacts with
proteins containing phosphorylated tyrosines, a
(glycine/proline)-rich collagen-homology domain that
contains the phosphorylated binding site, and a
C-terminal SH2 domain. SH2 has been shown to interact
with the tyrosine-phosphorylated receptors of EGF and
PDGF and with the tyrosine-phosphorylated C chain of the
T-cell receptor, providing one of the mechanisms of
T-cell-mediated Ras activation. In general SH2 domains
are involved in signal transduction. They typically
bind pTyr-containing ligands via two surface pockets, a
pTyr and hydrophobic binding pocket, allowing proteins
with SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 104
Score = 58.9 bits (143), Expect = 5e-11
Identities = 31/96 (32%), Positives = 50/96 (52%), Gaps = 6/96 (6%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
WY+G+++R DAE LL +G FL+R S ++PG + L+ + +H +L D G
Sbjct: 9 WYHGKMSRRDAESLLQT--DGDFLVRESTTTPGQYVLTGMQNGQPKHL-LLVDPEGVVRT 65
Query: 120 WVVKFNSLNELVEYHRT---ASVSRSQDVKLRDMVP 152
F S++ L+ YH T +S ++ LR V
Sbjct: 66 KDRVFESISHLINYHVTNGLPIISEGSELHLRRPVR 101
Score = 58.9 bits (143), Expect = 5e-11
Identities = 31/96 (32%), Positives = 50/96 (52%), Gaps = 6/96 (6%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
WY+G+++R DAE LL +G FL+R S ++PG + L+ + +H +L D G
Sbjct: 9 WYHGKMSRRDAESLLQT--DGDFLVRESTTTPGQYVLTGMQNGQPKHL-LLVDPEGVVRT 65
Query: 299 WVVKFNSLNELVEYHRT---ASVSRSQDVKLRDMVP 331
F S++ L+ YH T +S ++ LR V
Sbjct: 66 KDRVFESISHLINYHVTNGLPIISEGSELHLRRPVR 101
>gnl|CDD|198229 cd10366, SH2_Src_Yes, Src homology 2 (SH2) domain found in Yes.
Yes is a member of the Src non-receptor type tyrosine
kinase family of proteins. Yes is the cellular homolog
of the Yamaguchi sarcoma virus oncogene. In humans it is
encoded by the YES1 gene which maps to chromosome 18 and
is in close proximity to thymidylate synthase. A
corresponding Yes pseudogene has been found on
chromosome 22. YES1 has been shown to interact with
Janus kinase 2, CTNND1,RPL10, and Occludin. Yes1 has a
unique N-terminal domain, an SH3 domain, an SH2 domain,
a kinase domain and a regulatory tail, as do the other
members of the family. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 58.5 bits (141), Expect = 5e-11
Identities = 31/84 (36%), Positives = 54/84 (64%), Gaps = 8/84 (9%)
Query: 59 DWYYGRITRADAERLLSN--KHEGAFLIRVSESSPGDFSLSVK-----CSDGVQHFKVLR 111
+WY+G++ R DAERLL N G FL+R SE++ G +SLS++ D V+H+K+ +
Sbjct: 4 EWYFGKMGRKDAERLLLNPGNQRGIFLVRESETTKGAYSLSIRDWDEVRGDNVKHYKIRK 63
Query: 112 -DSSGKFFLWVVKFNSLNELVEYH 134
D+ G + +F++L +LV+++
Sbjct: 64 LDNGGYYITTRAQFDTLQKLVKHY 87
Score = 58.5 bits (141), Expect = 5e-11
Identities = 31/84 (36%), Positives = 54/84 (64%), Gaps = 8/84 (9%)
Query: 238 DWYYGRITRADAERLLSN--KHEGAFLIRVSESSPGDFSLSVK-----CSDGVQHFKVLR 290
+WY+G++ R DAERLL N G FL+R SE++ G +SLS++ D V+H+K+ +
Sbjct: 4 EWYFGKMGRKDAERLLLNPGNQRGIFLVRESETTKGAYSLSIRDWDEVRGDNVKHYKIRK 63
Query: 291 -DSSGKFFLWVVKFNSLNELVEYH 313
D+ G + +F++L +LV+++
Sbjct: 64 LDNGGYYITTRAQFDTLQKLVKHY 87
>gnl|CDD|198197 cd09944, SH2_Grb7_family, Src homology 2 (SH2) domain found in the
growth factor receptor bound, subclass 7 (Grb7)
proteins. The Grb family binds to the epidermal growth
factor receptor (EGFR, erbB1) via their SH2 domains.
There are 3 members of the Grb7 family of proteins:
Grb7, Grb10, and Grb14. They are composed of an
N-terminal Proline-rich domain, a Ras Associating-like
(RA) domain, a Pleckstrin Homology (PH) domain, a
phosphotyrosine interaction region (PIR, BPS) and a
C-terminal SH2 domain. The SH2 domains of Grb7, Grb10
and Grb14 preferentially bind to a different RTK. Grb7
binds strongly to the erbB2 receptor, unlike Grb10 and
Grb14 which bind weakly to it. Grb14 binds to Fibroblast
Growth Factor Receptor (FGFR). Grb10 has been shown to
interact with many different proteins, including the
insulin and IGF1 receptors, platelet-derived growth
factor (PDGF) receptor-beta, Ret, Kit, Raf1 and MEK1,
and Nedd4. Grb7 family proteins are phosphorylated on
serine/threonine as well as tyrosine residues. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 108
Score = 58.6 bits (142), Expect = 6e-11
Identities = 29/83 (34%), Positives = 51/83 (61%), Gaps = 7/83 (8%)
Query: 60 WYYGRITRADAERLLSNKH--EGAFLIRVSESSPGDFSLSVKCSDGVQHFKVL--RDSSG 115
W++G I+R +A RL+ + +G FL+R S+S+PG F LS+K ++H++++ D
Sbjct: 7 WFHGGISRDEAARLIRQQGLVDGVFLVRESQSNPGAFVLSLKHGQKIKHYQIIPIEDEGQ 66
Query: 116 KFFLW---VVKFNSLNELVEYHR 135
+F V KF L +LVE+++
Sbjct: 67 WYFTLDDGVTKFYDLLQLVEFYQ 89
Score = 58.6 bits (142), Expect = 6e-11
Identities = 29/83 (34%), Positives = 51/83 (61%), Gaps = 7/83 (8%)
Query: 239 WYYGRITRADAERLLSNKH--EGAFLIRVSESSPGDFSLSVKCSDGVQHFKVL--RDSSG 294
W++G I+R +A RL+ + +G FL+R S+S+PG F LS+K ++H++++ D
Sbjct: 7 WFHGGISRDEAARLIRQQGLVDGVFLVRESQSNPGAFVLSLKHGQKIKHYQIIPIEDEGQ 66
Query: 295 KFFLW---VVKFNSLNELVEYHR 314
+F V KF L +LVE+++
Sbjct: 67 WYFTLDDGVTKFYDLLQLVEFYQ 89
>gnl|CDD|212889 cd11956, SH3_srGAP4, Src homology 3 domain of Slit-Robo GTPase
Activating Protein 4. srGAP4, also called ARHGAP4, is
highly expressed in hematopoietic cells and may play a
role in lymphocyte differentiation. It is able to
stimulate the GTPase activity of Rac1, Cdc42, and RhoA.
In the nervous system, srGAP4 has been detected in
differentiating neurites and may be involved in axon and
dendritic growth. srGAPs are Rho GAPs that interact with
Robo1, the transmembrane receptor of Slit proteins. Slit
proteins are secreted proteins that control axon
guidance and the migration of neurons and leukocytes.
srGAPs contain an N-terminal F-BAR domain, a Rho GAP
domain, and a C-terminal SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 56.8 bits (137), Expect = 8e-11
Identities = 20/53 (37%), Positives = 29/53 (54%)
Query: 154 ECLVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
E A +D+T + EL F+RGDV+ + ++ WW GE +GL P YI
Sbjct: 1 EVEAVACFDYTGRTAQELSFKRGDVLLLHSKASSDWWRGEHNGMRGLIPHKYI 53
Score = 46.0 bits (109), Expect = 4e-07
Identities = 21/53 (39%), Positives = 32/53 (60%), Gaps = 1/53 (1%)
Query: 1 MEAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
+EA+A D+ ELSF++ VL +L+ + +W+R E +G GLIP YI
Sbjct: 2 VEAVACFDYTGRTAQELSFKRGDVL-LLHSKASSDWWRGEHNGMRGLIPHKYI 53
>gnl|CDD|212702 cd11768, SH3_Tec_like, Src Homology 3 domain of Tec-like Protein
Tyrosine Kinases. The Tec (Tyrosine kinase expressed in
hepatocellular carcinoma) subfamily is composed of Tec,
Btk, Bmx (Etk), Itk (Tsk, Emt), Rlk (Txk), and similar
proteins. They are cytoplasmic (or nonreceptor) tyr
kinases containing Src homology protein interaction
domains (SH3, SH2) N-terminal to the catalytic tyr
kinase domain. Most Tec subfamily members (except Rlk)
also contain an N-terminal pleckstrin homology (PH)
domain, which binds the products of PI3K and allows
membrane recruitment and activation. In addition, some
members contain the Tec homology (TH) domain, which
contains proline-rich and zinc-binding regions. Tec
kinases are expressed mainly by haematopoietic cells,
although Tec and Bmx are also found in endothelial
cells. B-cells express Btk and Tec, while T-cells
express Itk, Txk, and Tec. Collectively, Tec kinases are
expressed in a variety of myeloid cells such as mast
cells, platelets, macrophages, and dendritic cells. Each
Tec kinase shows a distinct cell-type pattern of
expression. The function of Tec kinases in lymphoid
cells have been studied extensively. They play important
roles in the development, differentiation, maturation,
regulation, survival, and function of B-cells and
T-cells. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 56.5 bits (137), Expect = 9e-11
Identities = 28/78 (35%), Positives = 36/78 (46%), Gaps = 25/78 (32%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNW 215
+V ALYDF P EPG+L +G+ V D S++HWW AR
Sbjct: 1 IVVALYDFQPIEPGDLPLEKGEEYVVLDDSNEHWWR----ARDK---------------- 40
Query: 216 YRAELDGKEGLIPSNYIE 233
+G EG IPSNY+
Sbjct: 41 -----NGNEGYIPSNYVT 53
Score = 39.2 bits (92), Expect = 1e-04
Identities = 20/54 (37%), Positives = 29/54 (53%), Gaps = 6/54 (11%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMN--WYRA-ELDGKEGLIPSNYIE 54
+A +DF +L K + +L DD N W+RA + +G EG IPSNY+
Sbjct: 3 VALYDFQPIEPGDLPLEKGEEYVVL---DDSNEHWWRARDKNGNEGYIPSNYVT 53
Score = 32.2 bits (74), Expect = 0.032
Identities = 11/21 (52%), Positives = 14/21 (66%)
Query: 335 LVQALYDFTPQEPGELEFRRD 355
+V ALYDF P EPG+L +
Sbjct: 1 IVVALYDFQPIEPGDLPLEKG 21
>gnl|CDD|198207 cd10344, SH2_SLAP, Src homology 2 domain found in Src-like adaptor
proteins. SLAP belongs to the subfamily of adapter
proteins that negatively regulate cellular signaling
initiated by tyrosine kinases. It has a myristylated
N-terminus, SH3 and SH2 domains with high homology to
Src family tyrosine kinases, and a unique C-terminal
tail, which is important for c-Cbl binding. SLAP
negatively regulates platelet-derived growth factor
(PDGF)-induced mitogenesis in fibroblasts and regulates
F-actin assembly for dorsal ruffles formation. c-Cbl
mediated SLAP inhibition towards actin remodeling.
Moreover, SLAP enhanced PDGF-induced c-Cbl
phosphorylation by SFK. In contrast, SLAP mitogenic
inhibition was not mediated by c-Cbl, but it rather
involved a competitive mechanism with SFK for
PDGF-receptor (PDGFR) association and mitogenic
signaling. Accordingly, phosphorylation of the Src
mitogenic substrates Stat3 and Shc were reduced by SLAP.
Thus, we concluded that SLAP regulates PDGFR signaling
by two independent mechanisms: a competitive mechanism
for PDGF-induced Src mitogenic signaling and a
non-competitive mechanism for dorsal ruffles formation
mediated by c-Cbl. SLAP is a hematopoietic adaptor
containing Src homology (SH)3 and SH2 motifs and a
unique carboxy terminus. Unlike c-Src, SLAP lacks a
tyrosine kinase domain. Unlike c-Src, SLAP does not
impact resorptive function of mature osteoclasts but
induces their early apoptosis. SLAP negatively regulates
differentiation of osteoclasts and proliferation of
their precursors. Conversely, SLAP decreases osteoclast
death by inhibiting activation of caspase 3. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 104
Score = 57.5 bits (139), Expect = 1e-10
Identities = 32/94 (34%), Positives = 52/94 (55%), Gaps = 8/94 (8%)
Query: 49 PSNYIEMKNHDWYYGRITRADAERLLS--NKHEGAFLIRVSESSPGDFSLSVKCS----- 101
PSNY+ H W + ++R AE LL G+FLIR SE+ G +SLSV+
Sbjct: 1 PSNYVAKVYHGWLFEGLSREKAEELLMLPGNQVGSFLIRESETRRGCYSLSVRHRGSQSR 60
Query: 102 DGVQHFKVLRDSSGKFFLWV-VKFNSLNELVEYH 134
D V+H+++ R +G F++ + F L ++V ++
Sbjct: 61 DSVKHYRIFRLDNGWFYISPRLTFQCLEDMVNHY 94
Score = 57.5 bits (139), Expect = 1e-10
Identities = 32/94 (34%), Positives = 52/94 (55%), Gaps = 8/94 (8%)
Query: 228 PSNYIEMKNHDWYYGRITRADAERLLS--NKHEGAFLIRVSESSPGDFSLSVKCS----- 280
PSNY+ H W + ++R AE LL G+FLIR SE+ G +SLSV+
Sbjct: 1 PSNYVAKVYHGWLFEGLSREKAEELLMLPGNQVGSFLIRESETRRGCYSLSVRHRGSQSR 60
Query: 281 DGVQHFKVLRDSSGKFFLWV-VKFNSLNELVEYH 313
D V+H+++ R +G F++ + F L ++V ++
Sbjct: 61 DSVKHYRIFRLDNGWFYISPRLTFQCLEDMVNHY 94
>gnl|CDD|212808 cd11875, SH3_CD2AP-like_3, Third Src Homology 3 domain (SH3C) of
CD2-associated protein and similar proteins. This
subfamily is composed of the third SH3 domain (SH3C) of
CD2AP, CIN85 (Cbl-interacting protein of 85 kDa), and
similar domains. CD2AP and CIN85 are adaptor proteins
that bind to protein partners and assemble complexes
that have been implicated in T cell activation, kidney
function, and apoptosis of neuronal cells. They also
associate with endocytic proteins, actin cytoskeleton
components, and other adaptor proteins involved in
receptor tyrosine kinase (RTK) signaling. CD2AP and the
main isoform of CIN85 contain three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CD2AP and CIN85 to
bind various protein partners and assemble complexes
that have been implicated in many different functions.
SH3C of both proteins have been shown to bind to
ubiquitin. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 55.8 bits (135), Expect = 1e-10
Identities = 16/48 (33%), Positives = 29/48 (60%), Gaps = 2/48 (4%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRS--DQHWWHGEIGARKGLFP 202
+ L+D+ + EL R GD++T+ + D+ WW GE+ ++G+FP
Sbjct: 2 ARVLFDYEAENEDELTLREGDIVTILSKDCEDKGWWKGELNGKRGVFP 49
Score = 49.3 bits (118), Expect = 3e-08
Identities = 19/48 (39%), Positives = 33/48 (68%), Gaps = 1/48 (2%)
Query: 8 DFNATAEDELSFRKSQVLKILNME-DDMNWYRAELDGKEGLIPSNYIE 54
D+ A EDEL+ R+ ++ IL+ + +D W++ EL+GK G+ P N++E
Sbjct: 7 DYEAENEDELTLREGDIVTILSKDCEDKGWWKGELNGKRGVFPDNFVE 54
>gnl|CDD|212761 cd11827, SH3_MyoIe_If_like, Src homology 3 domain of Myosins Ie,
If, and similar proteins. Myosins Ie (MyoIe) and If
(MyoIf) are nonmuscle, unconventional, long tailed,
class I myosins containing an N-terminal motor domain
and a myosin tail with TH1, TH2, and SH3 domains. MyoIe
interacts with the endocytic proteins, dynamin and
synaptojanin-1, through its SH3 domain; it may play a
role in clathrin-dependent endocytosis. In the kidney,
MyoIe is critical for podocyte function and normal
glomerular filtration. Mutations in MyoIe is associated
with focal segmental glomerulosclerosis, a disease
characterized by massive proteinuria and progression to
end-stage kidney disease. MyoIf is predominantly
expressed in the immune system; it plays a role in
immune cell motility and innate immunity. Mutations in
MyoIf may be associated with the loss of hearing. The
MyoIf gene has also been found to be fused to the MLL
(Mixed lineage leukemia) gene in infant acute myeloid
leukemias (AML). SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 55.9 bits (135), Expect = 2e-10
Identities = 18/50 (36%), Positives = 27/50 (54%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ALY + Q+ EL F GD+I + WW G + ++GLFP Y+
Sbjct: 2 CKALYAYDAQDTDELSFNEGDIIEILKEDPSGWWTGRLRGKEGLFPGNYV 51
Score = 48.6 bits (116), Expect = 5e-08
Identities = 22/50 (44%), Positives = 31/50 (62%), Gaps = 1/50 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A + ++A DELSF + +++IL ED W+ L GKEGL P NY+E
Sbjct: 4 ALYAYDAQDTDELSFNEGDIIEILK-EDPSGWWTGRLRGKEGLFPGNYVE 52
>gnl|CDD|212751 cd11817, SH3_Eve1_4, Fourth Src homology 3 domain of ADAM-binding
protein Eve-1. Eve-1, also called SH3 domain-containing
protein 19 (SH3D19) or EEN-binding protein (EBP), exists
in multiple alternatively spliced isoforms. The longest
isoform contains five SH3 domain in the C-terminal
region and seven proline-rich motifs in the N-terminal
region. It is abundantly expressed in skeletal muscle
and heart, and may be involved in regulating the
activity of ADAMs (A disintegrin and metalloproteases).
Eve-1 interacts with EEN, an endophilin involved in
endocytosis and may be the target of the MLL-EEN fusion
protein that is implicated in leukemogenesis. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 50
Score = 55.6 bits (134), Expect = 2e-10
Identities = 21/49 (42%), Positives = 29/49 (59%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATY 205
ALYDFT + +L F+RGD I VT+ D W G + R+G+FP +
Sbjct: 2 AVALYDFTGETEEDLSFQRGDRILVTEHLDAEWSRGRLNGREGIFPRAF 50
Score = 46.3 bits (110), Expect = 4e-07
Identities = 16/50 (32%), Positives = 28/50 (56%), Gaps = 1/50 (2%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNY 52
A+A +DF E++LSF++ + + D W R L+G+EG+ P +
Sbjct: 2 AVALYDFTGETEEDLSFQRGDRILVTEHLDA-EWSRGRLNGREGIFPRAF 50
>gnl|CDD|212803 cd11870, SH3_p67phox-like_C, C-terminal Src Homology 3 domain of
the p67phox subunit of NADPH oxidase and similar
proteins. This subfamily is composed of p67phox, NADPH
oxidase activator 1 (Noxa1), and similar proteins.
p67phox, also called Neutrophil cytosol factor 2
(NCF-2), and Noxa1 are homologs and are the cytosolic
subunits of the phagocytic (Nox2) and nonphagocytic
(Nox1) NADPH oxidase complexes, respectively. NADPH
oxidase catalyzes the transfer of electrons from NADPH
to oxygen during phagocytosis forming superoxide and
reactive oxygen species. p67phox and Noxa1 play
regulatory roles. p67phox contains N-terminal TPR, first
SH3 (or N-terminal or central SH3), PB1, and C-terminal
SH3 domains. Noxa1 has a similar domain architecture
except it is lacking the N-terminal SH3 domain. The TPR
domain of both binds activated GTP-bound Rac, while the
C-terminal SH3 domain of p67phox and Noxa1 binds the
polyproline motif found at the C-terminus of p47phox and
Noxo1, respectively. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 55.6 bits (134), Expect = 2e-10
Identities = 18/50 (36%), Positives = 26/50 (52%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V AL+ + Q P +L FR GD I V ++ W G R G+FP ++
Sbjct: 2 VVALHRYEAQGPEDLGFREGDTIDVLSEVNEAWLEGHSDGRVGIFPKCFV 51
Score = 36.0 bits (83), Expect = 0.002
Identities = 13/53 (24%), Positives = 27/53 (50%), Gaps = 1/53 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
+ +A H + A ++L FR+ + +L+ E + W DG+ G+ P ++
Sbjct: 1 QVVALHRYEAQGPEDLGFREGDTIDVLS-EVNEAWLEGHSDGRVGIFPKCFVV 52
>gnl|CDD|198226 cd10363, SH2_Src_HCK, Src homology 2 (SH2) domain found in HCK.
HCK is a member of the Src non-receptor type tyrosine
kinase family of proteins and is expressed in
hemopoietic cells. HCK is proposed to couple the Fc
receptor to the activation of the respiratory burst. It
may also play a role in neutrophil migration and in the
degranulation of neutrophils. It has two different
translational starts that have different subcellular
localization. HCK has been shown to interact with BCR
gene, ELMO1 Cbl gene, RAS p21 protein activator 1,
RASA3, Granulocyte colony-stimulating factor receptor,
ADAM15 and RAPGEF1. Like the other members of the Src
family the SH2 domain in addition to binding the target,
also plays an autoinhibitory role by binding to its
C-terminal tail. In general SH2 domains are involved in
signal transduction. HCK has a unique N-terminal domain,
an SH3 domain, an SH2 domain, a kinase domain and a
regulatory tail, as do the other members of the family.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 104
Score = 57.3 bits (138), Expect = 2e-10
Identities = 30/88 (34%), Positives = 53/88 (60%), Gaps = 8/88 (9%)
Query: 59 DWYYGRITRADAER--LLSNKHEGAFLIRVSESSPGDFSLSVKCSDG-----VQHFKVLR 111
+W++ I+R DAER L G+F+IR SE++ G +SLSV+ D V+H+K+
Sbjct: 4 EWFFKGISRKDAERQLLAPGNMLGSFMIRDSETTKGSYSLSVRDYDPQHGDTVKHYKIRT 63
Query: 112 DSSGKFFLWV-VKFNSLNELVEYHRTAS 138
+G F++ F++L ELV++++ +
Sbjct: 64 LDNGGFYISPRSTFSTLQELVDHYKKGN 91
Score = 57.3 bits (138), Expect = 2e-10
Identities = 30/88 (34%), Positives = 53/88 (60%), Gaps = 8/88 (9%)
Query: 238 DWYYGRITRADAER--LLSNKHEGAFLIRVSESSPGDFSLSVKCSDG-----VQHFKVLR 290
+W++ I+R DAER L G+F+IR SE++ G +SLSV+ D V+H+K+
Sbjct: 4 EWFFKGISRKDAERQLLAPGNMLGSFMIRDSETTKGSYSLSVRDYDPQHGDTVKHYKIRT 63
Query: 291 DSSGKFFLWV-VKFNSLNELVEYHRTAS 317
+G F++ F++L ELV++++ +
Sbjct: 64 LDNGGFYISPRSTFSTLQELVDHYKKGN 91
>gnl|CDD|198213 cd10350, SH2_SH2D4A, Src homology 2 domain found in the SH2 domain
containing protein 4A (SH2D4A). SH2D4A contains a
single SH2 domain. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 57.2 bits (138), Expect = 2e-10
Identities = 31/93 (33%), Positives = 50/93 (53%), Gaps = 7/93 (7%)
Query: 50 SNYIEMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKV 109
S+ I W++G +T A LL + G+FLIRVSE G ++LS +G +HF +
Sbjct: 3 SDTIA----PWFHGILTLKKANELLLSTMPGSFLIRVSEKIKG-YALSYLSEEGCKHFLI 57
Query: 110 LRDSSGKFFLWV--VKFNSLNELVEYHRTASVS 140
+ FL V ++ +L +LVEYH+ ++
Sbjct: 58 DASADSYSFLGVDQLQHATLADLVEYHKEEPIT 90
Score = 57.2 bits (138), Expect = 2e-10
Identities = 31/93 (33%), Positives = 50/93 (53%), Gaps = 7/93 (7%)
Query: 229 SNYIEMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKV 288
S+ I W++G +T A LL + G+FLIRVSE G ++LS +G +HF +
Sbjct: 3 SDTIA----PWFHGILTLKKANELLLSTMPGSFLIRVSEKIKG-YALSYLSEEGCKHFLI 57
Query: 289 LRDSSGKFFLWV--VKFNSLNELVEYHRTASVS 319
+ FL V ++ +L +LVEYH+ ++
Sbjct: 58 DASADSYSFLGVDQLQHATLADLVEYHKEEPIT 90
>gnl|CDD|212777 cd11843, SH3_PACSIN, Src homology 3 domain of Protein kinase C and
Casein kinase Substrate in Neurons (PACSIN) proteins.
PACSINs, also called Synaptic dynamin-associated
proteins (Syndapins), act as regulators of cytoskeletal
and membrane dynamics. They bind both dynamin and
Wiskott-Aldrich syndrome protein (WASP), and may provide
direct links between the actin cytoskeletal machinery
through WASP and dynamin-dependent endocytosis.
Vetebrates harbor three isoforms with distinct
expression patterns and specific functions. PACSINs
contain an N-terminal F-BAR domain and a C-terminal SH3
domain. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 55.1 bits (133), Expect = 3e-10
Identities = 22/51 (43%), Positives = 33/51 (64%), Gaps = 1/51 (1%)
Query: 157 VQALYDFTPQEPGELEFRRGDVIT-VTDRSDQHWWHGEIGARKGLFPATYI 206
V+ALYD+ QE EL F+ GD++T + + +Q W G + R GL+PA Y+
Sbjct: 2 VRALYDYEGQESDELSFKAGDILTKLEEEDEQGWCKGRLDGRVGLYPANYV 52
Score = 49.0 bits (117), Expect = 4e-08
Identities = 21/50 (42%), Positives = 30/50 (60%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A +D+ DELSF+ +L L ED+ W + LDG+ GL P+NY+E
Sbjct: 4 ALYDYEGQESDELSFKAGDILTKLEEEDEQGWCKGRLDGRVGLYPANYVE 53
Score = 26.2 bits (58), Expect = 4.9
Identities = 10/18 (55%), Positives = 13/18 (72%)
Query: 336 VQALYDFTPQEPGELEFR 353
V+ALYD+ QE EL F+
Sbjct: 2 VRALYDYEGQESDELSFK 19
>gnl|CDD|198188 cd09934, SH2_Tec_family, Src homology 2 (SH2) domain found in
Tec-like proteins. The Tec protein tyrosine kinase is
the founding member of a family that includes Btk, Itk,
Bmx, and Txk. The members have a PH domain, a
zinc-binding motif, a SH3 domain, a SH2 domain, and a
protein kinase catalytic domain. Btk is involved in
B-cell receptor signaling with mutations in Btk
responsible for X-linked agammaglobulinemia (XLA) in
humans and X-linked immunodeficiency (xid) in mice. Itk
is involved in T-cell receptor signaling. Tec is
expressed in both T and B cells, and is thought to
function in activated and effector T lymphocytes to
induce the expression of genes regulated by NFAT
transcription factors. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 104
Score = 56.6 bits (137), Expect = 3e-10
Identities = 27/85 (31%), Positives = 51/85 (60%), Gaps = 9/85 (10%)
Query: 58 HDWYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSV--KCSDG--VQHFKVLRD 112
++WY G ++R AE LL + EG F++R S S+ G +++S+ K V+H+ + ++
Sbjct: 6 YEWYVGDMSRQRAESLLKQEDKEGCFVVRNS-STKGLYTVSLFTKVPGSPHVKHYHIKQN 64
Query: 113 SSGKFFLWVVK--FNSLNELVEYHR 135
+ +F+L K F ++ EL+ YH+
Sbjct: 65 ARSEFYL-AEKHCFETIPELINYHQ 88
Score = 56.6 bits (137), Expect = 3e-10
Identities = 27/85 (31%), Positives = 51/85 (60%), Gaps = 9/85 (10%)
Query: 237 HDWYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSV--KCSDG--VQHFKVLRD 291
++WY G ++R AE LL + EG F++R S S+ G +++S+ K V+H+ + ++
Sbjct: 6 YEWYVGDMSRQRAESLLKQEDKEGCFVVRNS-STKGLYTVSLFTKVPGSPHVKHYHIKQN 64
Query: 292 SSGKFFLWVVK--FNSLNELVEYHR 314
+ +F+L K F ++ EL+ YH+
Sbjct: 65 ARSEFYL-AEKHCFETIPELINYHQ 88
>gnl|CDD|212919 cd11986, SH3_Stac3_1, First C-terminal Src homology 3 domain of SH3
and cysteine-rich domain-containing protein 3 (Stac3).
Stac proteins are putative adaptor proteins that contain
a cysteine-rich C1 domain and one or two SH3 domains at
the C-terminus. There are three mammalian members
(Stac1, Stac2, and Stac3) of this family. Stac1 and
Stac3 contain two SH3 domains while Stac2 contains a
single SH3 domain at the C-terminus. Stac1 and Stac2
have been found to be expressed differently in mature
dorsal root ganglia (DRG) neurons. Stac1 is mainly
expressed in peptidergic neurons while Stac2 is found in
a subset of nonpeptidergic and all trkB+ neurons. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 54.9 bits (132), Expect = 3e-10
Identities = 22/49 (44%), Positives = 31/49 (63%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYIL 207
ALY F E +L+F G+ ITV D S++ WW G+IG + G FP +I+
Sbjct: 4 ALYRFKALEKDDLDFHPGERITVIDDSNEEWWRGKIGEKTGYFPMNFII 52
Score = 30.6 bits (69), Expect = 0.11
Identities = 16/52 (30%), Positives = 28/52 (53%), Gaps = 5/52 (9%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMN--WYRAELDGKEGLIPSNYI 53
+A + F A +D+L F + + ++ DD N W+R ++ K G P N+I
Sbjct: 3 VALYRFKALEKDDLDFHPGERITVI---DDSNEEWWRGKIGEKTGYFPMNFI 51
>gnl|CDD|198252 cd10389, SH2_SHB, Src homology 2 domain found in SH2
domain-containing adapter protein B (SHB). SHB
functions in generating signaling compounds in response
to tyrosine kinase activation. SHB contains proline-rich
motifs, a phosphotyrosine binding (PTB) domain, tyrosine
phosphorylation sites, and a SH2 domain. SHB mediates
certain aspects of platelet-derived growth factor (PDGF)
receptor-, fibroblast growth factor (FGF) receptor-,
neural growth factor (NGF) receptor TRKA-, T cell
receptor-, interleukin-2 (IL-2) receptor- and focal
adhesion kinase- (FAK) signaling. SRC-like FYN-Related
Kinase FRK/RAK (also named BSK/IYK or GTK) and SHB
regulate apoptosis, proliferation and differentiation.
SHB promotes apoptosis and is also required for proper
mitogenicity, spreading and tubular morphogenesis in
endothelial cells. SHB also plays a role in preventing
early cavitation of embryoid bodies and reduces
differentiation to cells expressing albumin, amylase,
insulin and glucagon. SHB is a multifunctional protein
that has difference responses in different cells under
various conditions. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 97
Score = 56.3 bits (135), Expect = 3e-10
Identities = 31/79 (39%), Positives = 48/79 (60%), Gaps = 3/79 (3%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
WY+G I+R DAE LL E ++L+R S++S D+SLS+K + G H K L + K+ L
Sbjct: 3 WYHGAISRGDAENLLRLCKECSYLVRNSQTSKHDYSLSLKSNQGFMHMK-LAKTKEKYVL 61
Query: 120 W--VVKFNSLNELVEYHRT 136
F+S+ E++ Y+ T
Sbjct: 62 GQNSPPFDSVPEVIHYYTT 80
Score = 56.3 bits (135), Expect = 3e-10
Identities = 31/79 (39%), Positives = 48/79 (60%), Gaps = 3/79 (3%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
WY+G I+R DAE LL E ++L+R S++S D+SLS+K + G H K L + K+ L
Sbjct: 3 WYHGAISRGDAENLLRLCKECSYLVRNSQTSKHDYSLSLKSNQGFMHMK-LAKTKEKYVL 61
Query: 299 W--VVKFNSLNELVEYHRT 315
F+S+ E++ Y+ T
Sbjct: 62 GQNSPPFDSVPEVIHYYTT 80
>gnl|CDD|212696 cd11762, SH3_FCHSD_2, Second Src Homology 3 domain of FCH and
double SH3 domains proteins. This group is composed of
FCH and double SH3 domains protein 1 (FCHSD1) and
FCHSD2. These proteins have a common domain structure
consisting of an N-terminal F-BAR (FES-CIP4 Homology and
Bin/Amphiphysin/Rvs), two SH3, and C-terminal
proline-rich domains. They have only been characterized
in silico and their functions remain unknown. This group
also includes the insect protein, nervous wreck, which
acts as a regulator of synaptic growth signaling. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 55.1 bits (133), Expect = 3e-10
Identities = 21/52 (40%), Positives = 28/52 (53%), Gaps = 4/52 (7%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQH----WWHGEIGARKGLFPA 203
LV+ALYD+ Q EL F G +I + + D WW GE R G+FP+
Sbjct: 1 LVRALYDYEAQSDEELSFPEGAIIRILRKDDNGVDDGWWEGEFNGRVGVFPS 52
Score = 40.8 bits (96), Expect = 3e-05
Identities = 18/53 (33%), Positives = 33/53 (62%), Gaps = 3/53 (5%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMED---DMNWYRAELDGKEGLIPSNYIE 54
A +D+ A +++ELSF + +++IL +D D W+ E +G+ G+ PS +E
Sbjct: 4 ALYDYEAQSDEELSFPEGAIIRILRKDDNGVDDGWWEGEFNGRVGVFPSLVVE 56
Score = 27.0 bits (60), Expect = 3.3
Identities = 10/18 (55%), Positives = 12/18 (66%)
Query: 335 LVQALYDFTPQEPGELEF 352
LV+ALYD+ Q EL F
Sbjct: 1 LVRALYDYEAQSDEELSF 18
>gnl|CDD|198251 cd10388, SH2_SOCS7, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 56.2 bits (136), Expect = 4e-10
Identities = 31/84 (36%), Positives = 47/84 (55%), Gaps = 6/84 (7%)
Query: 54 EMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDS 113
E+K+ WY+G ++ DAE++LSNK +G+FL+R S FSLS + V H ++ +
Sbjct: 6 ELKDCGWYWGPMSWEDAEKVLSNKPDGSFLVRDSSDDRYIFSLSFRSQGSVHHTRIEQY- 64
Query: 114 SGKFFLW-----VVKFNSLNELVE 132
G F L V + SL E +E
Sbjct: 65 QGTFSLGSRNKFVDRSQSLVEFIE 88
Score = 56.2 bits (136), Expect = 4e-10
Identities = 31/84 (36%), Positives = 47/84 (55%), Gaps = 6/84 (7%)
Query: 233 EMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDS 292
E+K+ WY+G ++ DAE++LSNK +G+FL+R S FSLS + V H ++ +
Sbjct: 6 ELKDCGWYWGPMSWEDAEKVLSNKPDGSFLVRDSSDDRYIFSLSFRSQGSVHHTRIEQY- 64
Query: 293 SGKFFLW-----VVKFNSLNELVE 311
G F L V + SL E +E
Sbjct: 65 QGTFSLGSRNKFVDRSQSLVEFIE 88
>gnl|CDD|212743 cd11809, SH3_srGAP, Src homology 3 domain of Slit-Robo GTPase
Activating Proteins. Slit-Robo GTPase Activating
Proteins (srGAPs) are Rho GAPs that interact with Robo1,
the transmembrane receptor of Slit proteins. Slit
proteins are secreted proteins that control axon
guidance and the migration of neurons and leukocytes.
Vertebrates contain three isoforms of srGAPs (srGAP1-3),
all of which are expressed during embryonic and early
development in the nervous system but with different
localization and timing. A fourth member has also been
reported (srGAP4, also called ARHGAP4). srGAPs contain
an N-terminal F-BAR domain, a Rho GAP domain, and a
C-terminal SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 54.7 bits (132), Expect = 4e-10
Identities = 17/49 (34%), Positives = 28/49 (57%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYIL 207
A +D+T + EL F++GD +T+ + WW G++ + GL P YI
Sbjct: 4 AQFDYTGRSERELSFKKGDSLTLYRQVSDDWWRGQLNGQDGLVPHKYIT 52
Score = 52.8 bits (127), Expect = 2e-09
Identities = 21/52 (40%), Positives = 33/52 (63%), Gaps = 1/52 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
EA A+ D+ +E ELSF+K L + D +W+R +L+G++GL+P YI
Sbjct: 1 EATAQFDYTGRSERELSFKKGDSLTLYRQVSD-DWWRGQLNGQDGLVPHKYI 51
>gnl|CDD|212779 cd11845, SH3_Src_like, Src homology 3 domain of Src kinase-like
Protein Tyrosine Kinases. Src subfamily members
include Src, Lck, Hck, Blk, Lyn, Fgr, Fyn, Yrk, Yes,
and Brk. Src (or c-Src) proteins are cytoplasmic (or
non-receptor) PTKs which are anchored to the plasma
membrane. They contain an N-terminal SH4 domain with a
myristoylation site, followed by SH3 and SH2 domains, a
tyr kinase domain, and a regulatory C-terminal region
containing a conserved tyr. They are activated by
autophosphorylation at the tyr kinase domain, but are
negatively regulated by phosphorylation at the
C-terminal tyr by Csk (C-terminal Src Kinase). However,
Brk lacks the N-terminal myristoylation sites. Src
proteins are involved in signaling pathways that
regulate cytokine and growth factor responses,
cytoskeleton dynamics, cell proliferation, survival,
and differentiation. They were identified as the first
proto-oncogene products, and they regulate cell
adhesion, invasion, and motility in cancer cells, and
tumor vasculature, contributing to cancer progression
and metastasis. Src kinases are overexpressed in a
variety of human cancers, making them attractive
targets for therapy. They are also implicated in acute
inflammatory responses and osteoclast function. Src,
Fyn, Yes, and Yrk are widely expressed, while Blk, Lck,
Hck, Fgr, Lyn, and Brk show a limited expression
pattern. This subfamily also includes Drosophila
Src42A, Src oncogene at 42A (also known as Dsrc41)
which accumulates at sites of cell-cell or cell-matrix
adhesion, and participates in Drosphila development and
wound healing. It has been shown to promote tube
elongation in the tracheal system, is essential for
proper cell-cell matching during dorsal closure, and
regulates cell-cell contacts in developing Drosophila
eyes. The SH3 domain of Src kinases contributes to
substrate recruitment by binding adaptor
proteins/substrates, and regulation of kinase activity
through an intramolecular interaction. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 52
Score = 54.5 bits (132), Expect = 5e-10
Identities = 23/51 (45%), Positives = 33/51 (64%), Gaps = 3/51 (5%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAEL--DGKEGLIPSNY 52
+A +D+ A +D+LSF+K L+IL+ D +W+ A GKEG IPSNY
Sbjct: 3 VALYDYEARTDDDLSFKKGDRLQILDDSDG-DWWLARHLSTGKEGYIPSNY 52
Score = 44.9 bits (107), Expect = 1e-06
Identities = 23/73 (31%), Positives = 30/73 (41%), Gaps = 24/73 (32%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYRA 218
ALYD+ + +L F++GD + + D SD WW R
Sbjct: 4 ALYDYEARTDDDLSFKKGDRLQILDDSDGDWW------------------------LARH 39
Query: 219 ELDGKEGLIPSNY 231
GKEG IPSNY
Sbjct: 40 LSTGKEGYIPSNY 52
>gnl|CDD|212758 cd11824, SH3_PSTPIP1, Src homology 3 domain of
Proline-Serine-Threonine Phosphatase-Interacting Protein
1. PSTPIP1, also called CD2 Binding Protein 1 (CD2BP1),
is mainly expressed in hematopoietic cells. It is a
binding partner of the cell surface receptor CD2 and
PTP-PEST, a tyrosine phosphatase which functions in cell
motility and Rac1 regulation. It also plays a role in
the activation of the Wiskott-Aldrich syndrome protein
(WASP), which couples actin rearrangement and T cell
activation. Mutations in the gene encoding PSTPIP1 cause
the autoinflammatory disorder known as PAPA (pyogenic
sterile arthritis, pyoderma gangrenosum, and acne)
syndrome. PSTPIP1 contains an N-terminal F-BAR domain,
PEST motifs, and a C-terminal SH3 domain. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 54.3 bits (131), Expect = 5e-10
Identities = 21/49 (42%), Positives = 29/49 (59%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
LYD+T QE EL +GDV+ V ++ + WW E +KGL P TY+
Sbjct: 3 SVLYDYTAQEDDELSISKGDVVAVIEKGEDGWWTVERNGQKGLVPGTYL 51
Score = 44.7 bits (106), Expect = 1e-06
Identities = 17/53 (32%), Positives = 31/53 (58%), Gaps = 1/53 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
+ +D+ A +DELS K V+ ++ +D W+ E +G++GL+P Y+E
Sbjct: 1 KYSVLYDYTAQEDDELSISKGDVVAVIEKGED-GWWTVERNGQKGLVPGTYLE 52
>gnl|CDD|212896 cd11963, SH3_STAM2, Src homology 3 domain of Signal Transducing
Adaptor Molecule 2. STAM2, also called EAST (Epidermal
growth factor receptor-associated protein with SH3 and
TAM domain) or Hbp (Hrs binding protein), is part of the
endosomal sorting complex required for transport
(ESCRT-0). It plays a role in sorting mono-ubiquinated
endosomal cargo for trafficking to the lysosome for
degradation. It is also involved in the regulation of
exocytosis. STAMs were discovered as proteins that are
highly phosphorylated following cytokine and growth
factor stimulation. They function in cytokine signaling
and surface receptor degradation, as well as regulate
Golgi morphology. They associate with many proteins
including Jak2 and Jak3 tyrosine kinases, Hrs, AMSH, and
UBPY. STAM adaptor proteins contain VHS (Vps27, Hrs,
STAM homology), ubiquitin interacting (UIM), and SH3
domains. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 54.3 bits (130), Expect = 5e-10
Identities = 24/50 (48%), Positives = 32/50 (64%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V+ALYDF E EL F+ G++I V D SD +WW GE GLFP+ ++
Sbjct: 4 VRALYDFEAVEDNELTFKHGEIIIVLDDSDANWWKGENHRGVGLFPSNFV 53
Score = 38.8 bits (90), Expect = 2e-04
Identities = 17/49 (34%), Positives = 32/49 (65%), Gaps = 1/49 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
A +DF A ++EL+F+ +++ +L+ + D NW++ E GL PSN++
Sbjct: 6 ALYDFEAVEDNELTFKHGEIIIVLD-DSDANWWKGENHRGVGLFPSNFV 53
>gnl|CDD|212925 cd11992, SH3_Intersectin2_3, Third Src homology 3 domain (or SH3C)
of Intersectin-2. Intersectin-2 (ITSN2) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN2 also functions as a specific GEF for Cdc42
activation in epithelial morphogenesis, and is required
in mitotic spindle orientation. It exists in
alternatively spliced short and long isoforms. The short
isoform contains two Eps15 homology domains (EH1 and
EH2), a coiled-coil region and five SH3 domains
(SH3A-E), while the long isoform, in addition, contains
RhoGEF (also called Dbl-homologous or DH), Pleckstrin
homology (PH) and C2 domains. The third SH3 domain
(SH3C) of ITSN2 has been shown to bind the K15 protein
of Kaposi's sarcoma-associated herpesvirus. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 53.9 bits (129), Expect = 8e-10
Identities = 22/48 (45%), Positives = 30/48 (62%), Gaps = 1/48 (2%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
ALY ++ EPG+L F G+ I VT + D WW G I R G+FP+ Y+
Sbjct: 4 ALYPYSSSEPGDLTFNEGEEILVTQK-DGEWWTGSIEDRTGIFPSNYV 50
Score = 30.7 bits (69), Expect = 0.12
Identities = 14/53 (26%), Positives = 31/53 (58%), Gaps = 2/53 (3%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
E IA + ++++ +L+F + + +IL + D W+ ++ + G+ PSNY+
Sbjct: 1 EYIALYPYSSSEPGDLTFNEGE--EILVTQKDGEWWTGSIEDRTGIFPSNYVR 51
>gnl|CDD|198219 cd10356, SH2_ShkA_ShkC, Src homology 2 (SH2) domain found in SH2
domain-bearing protein kinases A and C (ShkA and ShkC).
SH2-bearing genes cloned from Dictyostelium include two
transcription factors, STATa and STATc, and a signaling
factor, SHK1 (shkA). A database search of the
Dictyostelium discoideum genome revealed two additional
putative STAT sequences, dd-STATb and dd-STATd, and four
additional putative SHK genes, dd-SHK2 (shkB), dd-SHK3
(shkC), dd-SHK4 (shkD), and dd-SHK5 (shkE). This model
contains members of shkA and shkC. All of the SHK
members are most closely related to the protein kinases
found in plants. However these kinases in plants are
not conjugated to any SH2 or SH2-like sequences.
Alignment data indicates that the SHK SH2 domains carry
some features of the STAT SH2 domains in Dictyostelium.
When STATc's linker domain was used for a BLAST search,
the sequence between the protein kinase domain and the
SH2 domain (the linker) of SHK was recovered, suggesting
a close relationship among these molecules within this
region. SHK's linker domain is predicted to contain an
alpha-helix which is indeed homologous to that of STAT.
Based on the phylogenetic alignment, SH2 domains can be
grouped into two categories, STAT-type and Src-type. SHK
family members are in between, but are closer to the
STAT-type which indicates a close relationship between
SHK and STAT families in their SH2 domains and further
supports the notion that SHKs linker-SH2 domain evolved
from STAT or STATL (STAT-like Linker-SH2) domain found
in plants. In SHK, STAT, and SPT6, the linker-SH2
domains all reside exclusively in the C-terminal
regions. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 113
Score = 55.7 bits (134), Expect = 8e-10
Identities = 26/73 (35%), Positives = 45/73 (61%), Gaps = 2/73 (2%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDG-VQHFKVLRDSSGKFF 118
W++G I+ +++E L+ K EG FL+R S S PG +++S +G + H ++ R GKF
Sbjct: 12 WFHGDISTSESENRLNGKPEGTFLVRFSTSEPGAYTISKVSKNGGISHQRIHR-PGGKFQ 70
Query: 119 LWVVKFNSLNELV 131
+ K+ S+ EL+
Sbjct: 71 VNNSKYLSVKELI 83
Score = 55.7 bits (134), Expect = 8e-10
Identities = 26/73 (35%), Positives = 45/73 (61%), Gaps = 2/73 (2%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDG-VQHFKVLRDSSGKFF 297
W++G I+ +++E L+ K EG FL+R S S PG +++S +G + H ++ R GKF
Sbjct: 12 WFHGDISTSESENRLNGKPEGTFLVRFSTSEPGAYTISKVSKNGGISHQRIHR-PGGKFQ 70
Query: 298 LWVVKFNSLNELV 310
+ K+ S+ EL+
Sbjct: 71 VNNSKYLSVKELI 83
>gnl|CDD|213018 cd12142, SH3_D21-like, Src Homology 3 domain of SH3
domain-containing protein 21 (SH3D21) and similar
proteins. N-terminal SH3 domain of the uncharacterized
protein SH3 domain-containing protein 21, and similar
uncharacterized domains, it belongs to the CD2AP-like_3
subfamily of proteins. The CD2AP-like_3 subfamily is
composed of the third SH3 domain (SH3C) of CD2AP, CIN85
(Cbl-interacting protein of 85 kDa), and similar
domains. CD2AP and CIN85 are adaptor proteins that bind
to protein partners and assemble complexes that have
been implicated in T cell activation, kidney function,
and apoptosis of neuronal cells. They also associate
with endocytic proteins, actin cytoskeleton components,
and other adaptor proteins involved in receptor tyrosine
kinase (RTK) signaling. CD2AP and the main isoform of
CIN85 contain three SH3 domains, a proline-rich region,
and a C-terminal coiled-coil domain. All of these
domains enable CD2AP and CIN85 to bind various protein
partners and assemble complexes that have been
implicated in many different functions. SH3C of both
proteins have been shown to bind to ubiquitin. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 53.6 bits (129), Expect = 9e-10
Identities = 20/52 (38%), Positives = 32/52 (61%), Gaps = 2/52 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRS--DQHWWHGEIGARKGLFPATYIL 207
+ L+D+ P P EL ++GDVI V + D+ WW GE+ R+G FP +++
Sbjct: 3 RVLFDYNPVAPDELALKKGDVIEVISKETEDEGWWEGELNGRRGFFPDNFVM 54
Score = 45.5 bits (108), Expect = 6e-07
Identities = 17/49 (34%), Positives = 31/49 (63%), Gaps = 1/49 (2%)
Query: 8 DFNATAEDELSFRKSQVLKILNME-DDMNWYRAELDGKEGLIPSNYIEM 55
D+N A DEL+ +K V+++++ E +D W+ EL+G+ G P N++
Sbjct: 7 DYNPVAPDELALKKGDVIEVISKETEDEGWWEGELNGRRGFFPDNFVMP 55
>gnl|CDD|198191 cd09938, SH2_N-SH2_Zap70_Syk_like, N-terminal Src homology 2 (SH2)
domain found in Zeta-chain-associated protein kinase 70
(ZAP-70) and Spleen tyrosine kinase (Syk) proteins.
ZAP-70 and Syk comprise a family of hematopoietic cell
specific protein tyrosine kinases (PTKs) that are
required for antigen and antibody receptor function.
ZAP-70 is expressed in T and natural killer (NK) cells
and Syk is expressed in B cells, mast cells,
polymorphonuclear leukocytes, platelets, macrophages,
and immature T cells. They are required for the proper
development of T and B cells, immune receptors, and
activating NK cells. They consist of two N-terminal Src
homology 2 (SH2) domains and a C-terminal kinase domain
separated from the SH2 domains by a linker or hinge
region. Phosphorylation of both tyrosine residues within
the Immunoreceptor Tyrosine-based Activation Motifs
(ITAM; consensus sequence Yxx[LI]x(7,8)Yxx[LI]) by the
Src-family PTKs is required for efficient interaction of
ZAP-70 and Syk with the receptor subunits and for
receptor function. ZAP-70 forms two phosphotyrosine
binding pockets, one of which is shared by both SH2
domains. In Syk the two SH2 domains do not form such a
phosphotyrosine-binding site. The SH2 domains here are
believed to function independently. In addition, the two
SH2 domains of Syk display flexibility in their relative
orientation, allowing Syk to accommodate a greater
variety of spacing sequences between the ITAM
phosphotyrosines and singly phosphorylated non-classical
ITAM ligands. This model contains the N-terminus SH2
domains of both Syk and Zap70. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 104
Score = 55.1 bits (133), Expect = 9e-10
Identities = 28/82 (34%), Positives = 40/82 (48%), Gaps = 3/82 (3%)
Query: 60 WYYGRITRADAERLL--SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 117
++YG ITR +AE L + +G FL+R S S G + LSV H+ + R +G +
Sbjct: 3 FFYGSITREEAEEYLKLAGMSDGLFLLRQSLRSLGGYVLSVCHGRKFHHYTIERQLNGTY 62
Query: 118 FLWVVK-FNSLNELVEYHRTAS 138
+ K EL EYH T
Sbjct: 63 AIAGGKAHCGPAELCEYHSTDL 84
Score = 55.1 bits (133), Expect = 9e-10
Identities = 28/82 (34%), Positives = 40/82 (48%), Gaps = 3/82 (3%)
Query: 239 WYYGRITRADAERLL--SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 296
++YG ITR +AE L + +G FL+R S S G + LSV H+ + R +G +
Sbjct: 3 FFYGSITREEAEEYLKLAGMSDGLFLLRQSLRSLGGYVLSVCHGRKFHHYTIERQLNGTY 62
Query: 297 FLWVVK-FNSLNELVEYHRTAS 317
+ K EL EYH T
Sbjct: 63 AIAGGKAHCGPAELCEYHSTDL 84
>gnl|CDD|198206 cd10343, SH2_SHIP, Src homology 2 (SH2) domain found in
SH2-containing inositol-5'-phosphatase (SHIP) and
SLAM-associated protein (SAP). The SH2-containing
inositol-5'-phosphatase, SHIP (also called
SHIP1/SHIP1a), is a hematopoietic-restricted
phosphatidylinositide phosphatase that translocates to
the plasma membrane after extracellular stimulation and
hydrolyzes the phosphatidylinositol-3-kinase
(PI3K)-generated second messenger PI-3,4,5-P3 (PIP3) to
PI-3,4-P2. As a result, SHIP dampens down PIP3 mediated
signaling and represses the proliferation,
differentiation, survival, activation, and migration of
hematopoietic cells. PIP3 recruits lipid-binding
pleckstrin homology(PH) domain-containing proteins to
the inner wall of the plasma membrane and activates
them. PH domain-containing downstream effectors include
the survival/proliferation enhancing serine/threonine
kinase, Akt (protein kinase B), the tyrosine kinase,
Btk, the regulator of protein translation, S6K, and the
Rac and cdc42 guanine nucleotide exchange factor, Vav.
SHIP is believed to act as a tumor suppressor during
leukemogenesis and lymphomagenesis, and may play a role
in activating the immune system to combat cancer. SHIP
contains an N-terminal SH2 domain, a centrally located
phosphatase domain that specifically hydrolyzes the
5'-phosphate from PIP3, PI-4,5-P2 and inositol-1,3,4,5-
tetrakisphosphate (IP4), a C2 domain, that is an
allosteric activating site when bound by SHIP's
enzymatic product, PI-3,4-P2; 2 NPXY motifs that bind
proteins with a phosphotyrosine binding (Shc, Dok 1, Dok
2) or an SH2 (p85a, SHIP2) domain; and a proline-rich
domain consisting of four PxxP motifs that bind a subset
of SH3-containing proteins including Grb2, Src, Lyn,
Hck, Abl, PLCg1, and PIAS1. The SH2 domain of SHIP binds
to the tyrosine phosphorylated forms of Shc, SHP-2,
Doks, Gabs, CD150, platelet-endothelial cell adhesion
molecule, Cas, c-Cbl, immunoreceptor tyrosine-based
inhibitory motifs (ITIMs), and immunoreceptor
tyrosine-based activation motifs (ITAMs). The X-linked
lymphoproliferative syndrome (XLP) gene encodes SAP
(also called SH2D1A/DSHP) a protein that consists of a 5
residue N-terminus, a single SH2 domain, and a short 25
residue C-terminal tail. XLP is characterized by an
extreme sensitivity to Epstein-Barr virus. Both T and
natural killer (NK) cell dysfunctions have been seen in
XLP patients. SAP binds the cytoplasmic tail of
Signaling lymphocytic activation molecule (SLAM), 2B4,
Ly-9, and CD84. SAP is believed to function as a
signaling inhibitor, by blocking or regulating binding
of other signaling proteins. SAP and the SAP-like
protein EAT-2 recognize the sequence motif TIpYXX(V/I),
which is found in the cytoplasmic domains of a
restricted number of T, B, and NK cell surface receptors
and are proposed to be natural inhibitors or regulators
of the physiological role of a small family of receptors
on the surface of these cells. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 55.1 bits (133), Expect = 1e-09
Identities = 30/83 (36%), Positives = 49/83 (59%), Gaps = 7/83 (8%)
Query: 60 WYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFF 118
WY+G ITR+ AE LLS +G+FL+R SES G ++L V + V +++L ++ K
Sbjct: 5 WYHGNITRSKAEELLSKAGKDGSFLVRDSESVSGAYALCVLYQNCVHTYRILPNAEDKLS 64
Query: 119 LW------VVKFNSLNELVEYHR 135
+ V F +L EL+E+++
Sbjct: 65 VQASEGVPVRFFTTLPELIEFYQ 87
Score = 55.1 bits (133), Expect = 1e-09
Identities = 30/83 (36%), Positives = 49/83 (59%), Gaps = 7/83 (8%)
Query: 239 WYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFF 297
WY+G ITR+ AE LLS +G+FL+R SES G ++L V + V +++L ++ K
Sbjct: 5 WYHGNITRSKAEELLSKAGKDGSFLVRDSESVSGAYALCVLYQNCVHTYRILPNAEDKLS 64
Query: 298 LW------VVKFNSLNELVEYHR 314
+ V F +L EL+E+++
Sbjct: 65 VQASEGVPVRFFTTLPELIEFYQ 87
>gnl|CDD|212810 cd11877, SH3_PIX, Src Homology 3 domain of Pak Interactive eXchange
factors. PIX proteins are Rho guanine nucleotide
exchange factors (GEFs), which activate small GTPases by
exchanging bound GDP for free GTP. They act as GEFs for
both Cdc42 and Rac 1, and have been implicated in cell
motility, adhesion, neurite outgrowth, and cell
polarity. Vertebrates contain two proteins from the PIX
subfamily, alpha-PIX and beta-PIX. Alpha-PIX, also
called ARHGEF6, is localized in dendritic spines where
it regulates spine morphogenesis. Mutations in the
ARHGEF6 gene cause X-linked intellectual disability in
humans. Beta-PIX play roles in regulating neuroendocrine
exocytosis, focal adhesion maturation, cell migration,
synaptic vesicle localization, and insulin secretion.
PIX proteins contain an N-terminal SH3 domain followed
by RhoGEF (also called Dbl-homologous or DH) and
Pleckstrin Homology (PH) domains, and a C-terminal
leucine-zipper domain for dimerization. The SH3 domain
of PIX binds to an atypical PxxxPR motif in
p21-activated kinases (PAKs) with high affinity. The
binding of PAKs to PIX facilitate the localization of
PAKs to focal complexes and also localizes PAKs to PIX
targets Cdc43 and Rac, leading to the activation of
PAKs. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 53.5 bits (129), Expect = 1e-09
Identities = 20/51 (39%), Positives = 30/51 (58%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
LV+A ++F EL F +GD+ITVT + WW G + + G FP+ Y+
Sbjct: 1 LVRAKFNFEGTNEDELSFDKGDIITVTQVVEGGWWEGTLNGKTGWFPSNYV 51
Score = 49.2 bits (118), Expect = 3e-08
Identities = 20/50 (40%), Positives = 29/50 (58%), Gaps = 1/50 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
AK +F T EDELSF K ++ + + W+ L+GK G PSNY++
Sbjct: 4 AKFNFEGTNEDELSFDKGDIITV-TQVVEGGWWEGTLNGKTGWFPSNYVK 52
>gnl|CDD|212853 cd11920, SH3_Sorbs2_1, First Src Homology 3 domain of Sorbin and
SH3 domain containing 2 (Sorbs2), also called
Arg-binding protein 2 (ArgBP2). Sorbs2 or ArgBP2 is an
adaptor protein containing one sorbin homology (SoHo)
and three SH3 domains. It regulates actin-dependent
processes including cell adhesion, morphology, and
migration. It is expressed in many tissues and is
abundant in the heart. Like vinexin, it is found in
focal adhesion where it interacts with vinculin and
afadin. It also localizes in epithelial cell stress
fibers and in cardiac muscle cell Z-discs. Sorbs2 has
been implicated to play roles in the signaling of c-Arg,
Akt, and Pyk2. Other interaction partners of Sorbs2
include c-Abl, flotillin, spectrin, dynamin 1/2,
synaptojanin, PTP-PEST, among others. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 53.1 bits (127), Expect = 1e-09
Identities = 20/52 (38%), Positives = 33/52 (63%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNM 209
+A+YDF Q EL F++GD + + + DQ+W+ GE R G+FP +Y+ +
Sbjct: 4 RAVYDFKAQTSKELSFKKGDTVYILRKIDQNWYEGEHHGRVGIFPISYVEKL 55
Score = 42.3 bits (99), Expect = 1e-05
Identities = 22/52 (42%), Positives = 30/52 (57%), Gaps = 1/52 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A A +DF A ELSF+K + IL + D NWY E G+ G+ P +Y+E
Sbjct: 3 ARAVYDFKAQTSKELSFKKGDTVYILR-KIDQNWYEGEHHGRVGIFPISYVE 53
>gnl|CDD|198265 cd10402, SH2_C-SH2_Zap70, C-terminal Src homology 2 (SH2) domain
found in Zeta-chain-associated protein kinase 70
(ZAP-70). ZAP-70 and Syk comprise a family of
hematopoietic cell specific protein tyrosine kinases
(PTKs) that are required for antigen and antibody
receptor function. ZAP-70 is expressed in T and natural
killer (NK) cells and Syk is expressed in B cells, mast
cells, polymorphonuclear leukocytes, platelets,
macrophages, and immature T cells. They are required for
the proper development of T and B cells, immune
receptors, and activating NK cells. They consist of two
N-terminal Src homology 2 (SH2) domains and a C-terminal
kinase domain separated from the SH2 domains by a linker
or hinge region. Phosphorylation of both tyrosine
residues within the Immunoreceptor Tyrosine-based
Activation Motifs (ITAM; consensus sequence
Yxx[LI]x(7,8)Yxx[LI]) by the Src-family PTKs is required
for efficient interaction of ZAP-70 and Syk with the
receptor subunits and for receptor function. ZAP-70
forms two phosphotyrosine binding pockets, one of which
is shared by both SH2 domains. In Syk the two SH2
domains do not form such a phosphotyrosine-binding site.
The SH2 domains here are believed to function
independently. In addition, the two SH2 domains of Syk
display flexibility in their relative orientation,
allowing Syk to accommodate a greater variety of spacing
sequences between the ITAM phosphotyrosines and singly
phosphorylated non-classical ITAM ligands. This model
contains the C-terminus SH2 domains of Zap70. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 105
Score = 54.9 bits (132), Expect = 1e-09
Identities = 30/77 (38%), Positives = 48/77 (62%), Gaps = 4/77 (5%)
Query: 60 WYYGRITRADAERLL--SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 117
WY+G I R +AER L + +G FL+R + S G ++LS+ V H+++ +D SGK+
Sbjct: 12 WYHGSIARDEAERRLYSGAQPDGKFLLRERKES-GTYALSLVYGKTVYHYRIDQDKSGKY 70
Query: 118 FL-WVVKFNSLNELVEY 133
+ KF++L +LVEY
Sbjct: 71 SIPEGTKFDTLWQLVEY 87
Score = 54.9 bits (132), Expect = 1e-09
Identities = 30/77 (38%), Positives = 48/77 (62%), Gaps = 4/77 (5%)
Query: 239 WYYGRITRADAERLL--SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 296
WY+G I R +AER L + +G FL+R + S G ++LS+ V H+++ +D SGK+
Sbjct: 12 WYHGSIARDEAERRLYSGAQPDGKFLLRERKES-GTYALSLVYGKTVYHYRIDQDKSGKY 70
Query: 297 FL-WVVKFNSLNELVEY 312
+ KF++L +LVEY
Sbjct: 71 SIPEGTKFDTLWQLVEY 87
>gnl|CDD|198268 cd10405, SH2_Vav1, Src homology 2 (SH2) domain found in the Vav1
proteins. Proto-oncogene vav is a member of the Dbl
family of guanine nucleotide exchange factors (GEF) for
the Rho family of GTP binding proteins. All vavs are
activated by tyrosine phosphorylation leading to their
activation. There are three Vav mammalian family
members: Vav1 which is expressed in the hematopoietic
system, and Vav2 and Vav3 are more ubiquitously
expressed. Vav1 plays a role in T-cell and B-cell
development and activation. It has been identified as
the specific binding partner of Nef proteins from HIV-1,
resulting in morphological changes, cytoskeletal
rearrangements, and the JNK/SAPK signaling cascade,
leading to increased levels of viral transcription and
replication. Vav1 has been shown to interact with Ku70,
PLCG1, Lymphocyte cytosolic protein 2, Janus kinase 2,
SIAH2, S100B, Abl gene, ARHGDIB, SHB, PIK3R1, PRKCQ,
Grb2, MAPK1, Syk, Linker of activated T cells, Cbl gene
and EZH2. Vav proteins are involved in several processes
that require cytoskeletal reorganization, such as the
formation of the immunological synapse (IS),
phagocytosis, platelet aggregation, spreading, and
transformation. Vavs function as guanine nucleotide
exchange factors (GEFs) for the Rho/Rac family of
GTPases. Vav family members have several conserved
motifs/domains including: a leucine-rich region, a
leucine-zipper, a calponin homology (CH) domain, an
acidic domain, a Dbl-homology (DH) domain, a pleckstrin
homology (PH) domain, a cysteine-rich domain, 2 SH3
domains, a proline-rich region, and a SH2 domain. Vavs
are the only known Rho GEFs that have both the DH/PH
motifs and SH2/SH3 domains in the same protein. The
leucine-rich helix-loop-helix (HLH) domain is thought to
be involved in protein heterodimerization with other HLH
proteins and it may function as a negative regulator by
forming inactive heterodimers. The CH domain is usually
involved in the association with filamentous actin, but
in Vav it controls NFAT stimulation, Ca2+ mobilization,
and its transforming activity. Acidic domains are
involved in protein-protein interactions and contain
regulatory tyrosines. The DH domain is a GDP-GTP
exchange factor on Rho/Rac GTPases. The PH domain in
involved in interactions with GTP-binding proteins,
lipids and/or phosphorylated serine/threonine residues.
The SH3 domain is involved in localization of proteins
to specific sites within the cell interacting with
protein with proline-rich sequences. The SH2 domain
mediates a high affinity interaction with tyrosine
phosphorylated proteins. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 54.6 bits (131), Expect = 1e-09
Identities = 27/84 (32%), Positives = 49/84 (58%), Gaps = 4/84 (4%)
Query: 58 HDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 117
H WY G + RA AE +L+N+ +G +L+R +F++S+K + V+H K++ ++
Sbjct: 5 HLWYAGPMERAGAESILANRSDGTYLVRQRVKDAAEFAISIKYNVEVKHIKIM--TAEGL 62
Query: 118 FLWVVK--FNSLNELVEYHRTASV 139
+ K F L ELVE+++ S+
Sbjct: 63 YRITEKKAFRGLTELVEFYQQNSL 86
Score = 54.6 bits (131), Expect = 1e-09
Identities = 27/84 (32%), Positives = 49/84 (58%), Gaps = 4/84 (4%)
Query: 237 HDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 296
H WY G + RA AE +L+N+ +G +L+R +F++S+K + V+H K++ ++
Sbjct: 5 HLWYAGPMERAGAESILANRSDGTYLVRQRVKDAAEFAISIKYNVEVKHIKIM--TAEGL 62
Query: 297 FLWVVK--FNSLNELVEYHRTASV 318
+ K F L ELVE+++ S+
Sbjct: 63 YRITEKKAFRGLTELVEFYQQNSL 86
>gnl|CDD|212894 cd11961, SH3_Abp1_fungi_C2, Second C-terminal Src homology 3 domain
of Fungal Actin-binding protein 1. Abp1 is an adaptor
protein that functions in receptor-mediated endocytosis
and vesicle trafficking. It contains an N-terminal
actin-binding module, the actin-depolymerizing factor
(ADF) homology domain, a central proline-rich region,
and a C-terminal SH3 domain (many yeast Abp1 proteins
contain two C-terminal SH3 domains). Yeast Abp1 also
contains two acidic domains that bind directly to the
Arp2/3 complex, which is required to initiate actin
polymerization. The SH3 domain of yeast Abp1 binds and
localizes the kinases, Ark1p and Prk1p, which facilitate
actin patch disassembly following vesicle
internalization. It also mediates the localization to
the actin patch of the synaptojanin-like protein, Sjl2p,
which plays a key role in endocytosis. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 53
Score = 53.3 bits (128), Expect = 1e-09
Identities = 20/50 (40%), Positives = 26/50 (52%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ALYD+ E EL F D I + D WW GE +GLFP+ Y+
Sbjct: 2 AKALYDYDAAEDNELSFFENDKIINIEFVDDDWWLGECHGSRGLFPSNYV 51
Score = 42.5 bits (100), Expect = 9e-06
Identities = 20/53 (37%), Positives = 33/53 (62%), Gaps = 1/53 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
A A +D++A ++ELSF ++ + + DD +W+ E G GL PSNY+E+
Sbjct: 2 AKALYDYDAAEDNELSFFENDKIINIEFVDD-DWWLGECHGSRGLFPSNYVEL 53
>gnl|CDD|198216 cd10353, SH2_Nterm_RasGAP, N-terminal Src homology 2 (SH2) domain
found in Ras GTPase-activating protein 1 (GAP). RasGAP
is part of the GAP1 family of GTPase-activating
proteins. The protein is located in the cytoplasm and
stimulates the GTPase activity of normal RAS p21, but
not its oncogenic counterpart. Acting as a suppressor of
RAS function, the protein enhances the weak intrinsic
GTPase activity of RAS proteins resulting in RAS
inactivation, thereby allowing control of cellular
proliferation and differentiation. Mutations leading to
changes in the binding sites of either protein are
associated with basal cell carcinomas. Alternative
splicing results in two isoforms. The shorter isoform
which lacks the N-terminal hydrophobic region, has the
same activity, and is expressed in placental tissues. In
general the longer isoform contains 2 SH2 domains, a SH3
domain, a pleckstrin homology (PH) domain, and a
calcium-dependent phospholipid-binding C2 domain. The
C-terminus contains the catalytic domain of RasGap which
catalyzes the activation of Ras by hydrolyzing GTP-bound
active Ras into an inactive GDP-bound form of Ras. This
model contains the N-terminal SH2 domain. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 103
Score = 54.1 bits (130), Expect = 2e-09
Identities = 30/80 (37%), Positives = 47/80 (58%), Gaps = 2/80 (2%)
Query: 60 WYYGRITRADAE-RLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFF 118
WY+GR+ R AE RL G++LIR S+ PG F LS GV HF+++ G ++
Sbjct: 21 WYHGRLDRTIAEERLRQAGKLGSYLIRESDRRPGSFVLSFLSRTGVNHFRIIA-MCGDYY 79
Query: 119 LWVVKFNSLNELVEYHRTAS 138
+ +F+SL++L+ Y+ S
Sbjct: 80 IGGRRFSSLSDLIGYYSHVS 99
Score = 54.1 bits (130), Expect = 2e-09
Identities = 30/80 (37%), Positives = 47/80 (58%), Gaps = 2/80 (2%)
Query: 239 WYYGRITRADAE-RLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFF 297
WY+GR+ R AE RL G++LIR S+ PG F LS GV HF+++ G ++
Sbjct: 21 WYHGRLDRTIAEERLRQAGKLGSYLIRESDRRPGSFVLSFLSRTGVNHFRIIA-MCGDYY 79
Query: 298 LWVVKFNSLNELVEYHRTAS 317
+ +F+SL++L+ Y+ S
Sbjct: 80 IGGRRFSSLSDLIGYYSHVS 99
>gnl|CDD|198231 cd10368, SH2_Src_Fyn, Src homology 2 (SH2) domain found in Fyn.
Fyn is a member of the Src non-receptor type tyrosine
kinase family of proteins. Fyn is involved in the
control of cell growth and is required in the following
pathways: T and B cell receptor signaling,
integrin-mediated signaling, growth factor and cytokine
receptor signaling, platelet activation, ion channel
function, cell adhesion, axon guidance, fertilization,
entry into mitosis, and differentiation of natural
killer cells, oligodendrocytes and keratinocytes. The
protein associates with the p85 subunit of
phosphatidylinositol 3-kinase and interacts with the
Fyn-binding protein. Alternatively spliced transcript
variants encoding distinct isoforms exist. Fyn is
primarily localized to the cytoplasmic leaflet of the
plasma membrane. Tyrosine phosphorylation of target
proteins by Fyn serves to either regulate target protein
activity, and/or to generate a binding site on the
target protein that recruits other signaling molecules.
FYN has been shown to interact with a number of proteins
including: BCAR1, Cbl, Janus kinase, nephrin, Sky,
tyrosine kinase, Wiskott-Aldrich syndrome protein, and
Zap-70. Fyn has a unique N-terminal domain, an SH3
domain, an SH2 domain, a kinase domain and a regulatory
tail, as do the other members of the family. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 54.3 bits (130), Expect = 2e-09
Identities = 32/84 (38%), Positives = 53/84 (63%), Gaps = 8/84 (9%)
Query: 59 DWYYGRITRADAER-LLS-NKHEGAFLIRVSESSPGDFSLSVK-----CSDGVQHFKVLR 111
+WY+G++ R DAER LLS G FLIR SE++ G +SLS++ D V+H+K+ +
Sbjct: 4 EWYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIRK 63
Query: 112 -DSSGKFFLWVVKFNSLNELVEYH 134
D+ G + +F +L +LV+++
Sbjct: 64 LDNGGYYITTRAQFETLQQLVQHY 87
Score = 54.3 bits (130), Expect = 2e-09
Identities = 32/84 (38%), Positives = 53/84 (63%), Gaps = 8/84 (9%)
Query: 238 DWYYGRITRADAER-LLS-NKHEGAFLIRVSESSPGDFSLSVK-----CSDGVQHFKVLR 290
+WY+G++ R DAER LLS G FLIR SE++ G +SLS++ D V+H+K+ +
Sbjct: 4 EWYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIRK 63
Query: 291 -DSSGKFFLWVVKFNSLNELVEYH 313
D+ G + +F +L +LV+++
Sbjct: 64 LDNGGYYITTRAQFETLQQLVQHY 87
>gnl|CDD|212746 cd11812, SH3_AHI-1, Src Homology 3 domain of Abelson helper
integration site-1 (AHI-1). AHI-1, also called
Jouberin, is expressed in high levels in the brain,
gonad tissues, and skeletal muscle. It is an adaptor
protein that interacts with the small GTPase Rab8a and
regulates it distribution and function, affecting cilium
formation and vesicle transport. Mutations in the AHI-1
gene can cause Joubert syndrome, a disorder
characterized by brainstem malformations, cerebellar
aplasia/hypoplasia, and retinal dystrophy. AHI-1
variation is also associated with susceptibility to
schizophrenia and type 2 diabetes mellitus progression.
AHI-1 contains WD40 and SH3 domains. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 52
Score = 52.5 bits (126), Expect = 2e-09
Identities = 21/51 (41%), Positives = 30/51 (58%), Gaps = 1/51 (1%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIG-ARKGLFPATYI 206
V ALYD+T EL RGD+I V + + +WW G + ++G FPA Y+
Sbjct: 2 VVALYDYTANRSDELTIHRGDIIRVLYKDNDNWWFGSLVNGQQGYFPANYV 52
Score = 41.7 bits (98), Expect = 1e-05
Identities = 14/50 (28%), Positives = 33/50 (66%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
+A +D+ A DEL+ + ++++L ++D W+ + ++G++G P+NY+
Sbjct: 3 VALYDYTANRSDELTIHRGDIIRVLYKDNDNWWFGSLVNGQQGYFPANYV 52
>gnl|CDD|212862 cd11929, SH3_SH3RF2_1, First Src Homology 3 domain of SH3 domain
containing ring finger 2. SH3RF2 is also called POSHER
(POSH-eliminating RING protein) or HEPP1 (heart protein
phosphatase 1-binding protein). It acts as an
anti-apoptotic regulator of the JNK pathway by binding
to and promoting the degradation of SH3RF1 (or POSH), a
scaffold protein that is required for pro-apoptotic JNK
activation. It may also play a role in cardiac functions
together with protein phosphatase 1. SH3RF2 contains an
N-terminal RING finger domain and three SH3 domains.
This model represents the first SH3 domain, located at
the N-terminal half, of SH3RF2. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 52.6 bits (126), Expect = 2e-09
Identities = 19/49 (38%), Positives = 33/49 (67%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+AL ++ PG+L+F +GDVI + + D++W+ GEI G+FPA+ +
Sbjct: 4 KALCNYRGHNPGDLKFNKGDVILLRRQLDENWYLGEINGVSGIFPASSV 52
Score = 35.3 bits (81), Expect = 0.003
Identities = 16/53 (30%), Positives = 29/53 (54%), Gaps = 1/53 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
A A ++ +L F K V+ +L + D NWY E++G G+ P++ +E+
Sbjct: 3 AKALCNYRGHNPGDLKFNKGDVI-LLRRQLDENWYLGEINGVSGIFPASSVEV 54
>gnl|CDD|212783 cd11849, SH3_SPIN90, Src homology 3 domain of SH3 protein
interacting with Nck, 90 kDa (SPIN90). SPIN90 is also
called NCK interacting protein with SH3 domain
(NCKIPSD), Dia-interacting protein (DIP), 54 kDa
vimentin-interacting protein (VIP54), or
WASP-interacting SH3-domain protein (WISH). It is an
F-actin binding protein that regulates actin
polymerization and endocytosis. It associates with the
Arp2/3 complex near actin filaments and determines
filament localization at the leading edge of
lamellipodia. SPIN90 is expressed in the early stages of
neuronal differentiation and plays a role in regulating
growth cone dynamics and neurite outgrowth. It also
interacts with IRSp53 and regulates cell motility by
playing a role in the formation of membrane protrusions.
SPIN90 contains an N-terminal SH3 domain, a proline-rich
domain, and a C-terminal VCA (verprolin-homology and
cofilin-like acidic) domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 52.3 bits (126), Expect = 3e-09
Identities = 19/52 (36%), Positives = 26/52 (50%), Gaps = 1/52 (1%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWH-GEIGARKGLFPATYI 206
+ +ALYDF EP L F G+ + +RS+ HWW G PA Y+
Sbjct: 1 MYRALYDFKSAEPNTLSFSEGETFLLLERSNAHWWLVTNHSGETGYVPANYV 52
Score = 33.1 bits (76), Expect = 0.017
Identities = 13/50 (26%), Positives = 25/50 (50%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A +DF + + LSF + + +L + W G+ G +P+NY++
Sbjct: 4 ALYDFKSAEPNTLSFSEGETFLLLERSNAHWWLVTNHSGETGYVPANYVK 53
Score = 26.9 bits (60), Expect = 3.1
Identities = 9/21 (42%), Positives = 11/21 (52%)
Query: 335 LVQALYDFTPQEPGELEFRRD 355
+ +ALYDF EP L F
Sbjct: 1 MYRALYDFKSAEPNTLSFSEG 21
>gnl|CDD|212816 cd11883, SH3_Sdc25, Src Homology 3 domain of Sdc25/Cdc25 guanine
nucleotide exchange factors. This subfamily is composed
of the Saccharomyces cerevisiae guanine nucleotide
exchange factors (GEFs) Sdc25 and Cdc25, and similar
proteins. These GEFs regulate Ras by stimulating the
GDP/GTP exchange on Ras. Cdc25 is involved in the
Ras/PKA pathway that plays an important role in the
regulation of metabolism, stress responses, and
proliferation, depending on available nutrients and
conditions. Proteins in this subfamily contain an
N-terminal SH3 domain as well as REM (Ras exchanger
motif) and RasGEF domains at the C-terminus. SH3 domains
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs; they play a
role in the regulation of enzymes by intramolecular
interactions, changing the subcellular localization of
signal pathway components and mediate multiprotein
complex assemblies.
Length = 55
Score = 52.3 bits (126), Expect = 3e-09
Identities = 22/54 (40%), Positives = 31/54 (57%), Gaps = 5/54 (9%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIG-----ARKGLFPATY 205
V ALYDFTP+ +L F+ GD+I V ++ WW G I ++G FP+ Y
Sbjct: 2 VVALYDFTPKSKNQLSFKAGDIIYVLNKDPSGWWDGVIISSSGKVKRGWFPSNY 55
Score = 33.4 bits (77), Expect = 0.015
Identities = 16/54 (29%), Positives = 29/54 (53%), Gaps = 6/54 (11%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDG-----KEGLIPSNY 52
+A +DF ++++LSF+ ++ +LN +D W+ + K G PSNY
Sbjct: 3 VALYDFTPKSKNQLSFKAGDIIYVLN-KDPSGWWDGVIISSSGKVKRGWFPSNY 55
Score = 26.5 bits (59), Expect = 4.3
Identities = 10/18 (55%), Positives = 13/18 (72%)
Query: 336 VQALYDFTPQEPGELEFR 353
V ALYDFTP+ +L F+
Sbjct: 2 VVALYDFTPKSKNQLSFK 19
>gnl|CDD|198180 cd09926, SH2_CRK_like, Src homology 2 domain found in
cancer-related signaling adaptor protein CRK. SH2
domain in the CRK proteins. CRKI (SH2-SH3) and CRKII
(SH2-SH3-SH3) are splicing isoforms of the oncoprotein
CRK. CRKs regulate transcription and cytoskeletal
reorganization for cell growth and motility by linking
tyrosine kinases to small G proteins. The SH2 domain of
CRK associates with tyrosine-phosphorylated receptors or
components of focal adhesions, such as p130Cas and
paxillin. CRK transmits signals to small G proteins
through effectors that bind its SH3 domain, such as C3G,
the guanine-nucleotide exchange factor (GEF) for Rap1
and R-Ras, and DOCK180, the GEF for Rac6. The binding of
p130Cas to the CRK-C3G complex activates Rap1, leading
to regulation of cell adhesion, and activates R-Ras,
leading to JNK-mediated activation of cell
proliferation, whereas the binding of CRK DOCK180
induces Rac1-mediated activation of cellular migration.
The activity of the different splicing isoforms varies
greatly with CRKI displaying substantial transforming
activity, CRKII less so, and phosphorylated CRKII with
no biological activity whatsoever. CRKII has a linker
region with a phosphorylated Tyr and an additional
C-terminal SH3 domain. The phosphorylated Tyr creates a
binding site for its SH2 domain which disrupts the
association between CRK and its SH2 target proteins. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 106
Score = 53.6 bits (129), Expect = 3e-09
Identities = 20/48 (41%), Positives = 31/48 (64%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHF 107
WY+G ++R +A+ LL + G FL+R S + PGD+ LSV + V H+
Sbjct: 9 WYFGPMSRQEAQELLQGQRHGVFLVRDSSTIPGDYVLSVSENSRVSHY 56
Score = 53.6 bits (129), Expect = 3e-09
Identities = 20/48 (41%), Positives = 31/48 (64%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHF 286
WY+G ++R +A+ LL + G FL+R S + PGD+ LSV + V H+
Sbjct: 9 WYFGPMSRQEAQELLQGQRHGVFLVRDSSTIPGDYVLSVSENSRVSHY 56
>gnl|CDD|212753 cd11819, SH3_Cortactin_like, Src homology 3 domain of Cortactin and
related proteins. This subfamily includes cortactin,
Abp1 (actin-binding protein 1), hematopoietic lineage
cell-specific protein 1 (HS1), and similar proteins.
These proteins are involved in regulating actin dynamics
through direct or indirect interaction with the Arp2/3
complex, which is required to initiate actin
polymerization. They all contain at least one C-terminal
SH3 domain. Cortactin and HS1 bind Arp2/3 and actin
through an N-terminal region that contains an acidic
domain and several copies of a repeat domain found in
cortactin and HS1. Abp1 binds actin via an N-terminal
actin-depolymerizing factor (ADF) homology domain. Yeast
Abp1 binds Arp2/3 directly through two acidic domains.
Mammalian Abp1 does not directly interact with Arp2/3;
instead, it regulates actin dynamics indirectly by
interacting with dynamin and WASP family proteins. The
C-terminal region of these proteins acts as an adaptor
or scaffold that can connect membrane trafficking and
signaling proteins that bind the SH3 domain within the
actin network. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 51.9 bits (125), Expect = 3e-09
Identities = 22/49 (44%), Positives = 30/49 (61%), Gaps = 1/49 (2%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEI-GARKGLFPATYI 206
ALYD+ E E+ F GD+IT ++ D+ WW G +KGLFPA Y+
Sbjct: 4 ALYDYQAAEDNEISFVEGDIITQIEQIDEGWWLGVNAKGQKGLFPANYV 52
Score = 45.8 bits (109), Expect = 5e-07
Identities = 16/54 (29%), Positives = 32/54 (59%), Gaps = 2/54 (3%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAEL-DGKEGLIPSNYIEM 55
A A +D+ A ++E+SF + ++ + D+ W+ G++GL P+NY+E+
Sbjct: 2 AKALYDYQAAEDNEISFVEGDIITQIEQIDE-GWWLGVNAKGQKGLFPANYVEL 54
>gnl|CDD|212764 cd11830, SH3_VAV_2, C-terminal (or second) Src homology 3 domain
of VAV proteins. VAV proteins function both as
cytoplasmic guanine nucleotide exchange factors (GEFs)
for Rho GTPases and scaffold proteins and they play
important roles in cell signaling by coupling cell
surface receptors to various effector functions. They
play key roles in processes that require cytoskeletal
reorganization including immune synapse formation,
phagocytosis, cell spreading, and platelet aggregation,
among others. Vertebrates have three VAV proteins
(VAV1, VAV2, and VAV3). VAV proteins contain several
domains that enable their function: N-terminal calponin
homology (CH), acidic, RhoGEF (also called
Dbl-homologous or DH), Pleckstrin Homology (PH), C1
(zinc finger), SH2, and two SH3 domains. The SH3 domain
of VAV is involved in the localization of proteins to
specific sites within the cell, by interacting with
proline-rich sequences within target proteins. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 51.9 bits (124), Expect = 4e-09
Identities = 21/52 (40%), Positives = 32/52 (61%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A A++DF A ELS ++ V+KI N + W+R E++G+ G PS Y+E
Sbjct: 2 AKARYDFCARDMRELSLKEGDVVKIYNKKGQQGWWRGEINGRIGWFPSTYVE 53
Score = 50.7 bits (121), Expect = 1e-08
Identities = 21/49 (42%), Positives = 30/49 (61%), Gaps = 1/49 (2%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDR-SDQHWWHGEIGARKGLFPATYI 206
A YDF ++ EL + GDV+ + ++ Q WW GEI R G FP+TY+
Sbjct: 4 ARYDFCARDMRELSLKEGDVVKIYNKKGQQGWWRGEINGRIGWFPSTYV 52
>gnl|CDD|198195 cd09942, SH2_nSH2_p85_like, N-terminal Src homology 2 (nSH2) domain
found in p85. Phosphoinositide 3-kinases (PI3Ks) are
essential for cell growth, migration, and survival.
p110, the catalytic subunit, is composed of an
adaptor-binding domain, a Ras-binding domain, a C2
domain, a helical domain, and a kinase domain. The
regulatory unit is called p85 and is composed of an SH3
domain, a RhoGap domain, a N-terminal SH2 (nSH2) domain,
an internal SH2 (iSH2) domain, and C-terminal (cSH2)
domain. There are 2 inhibitory interactions between
p110alpha and p85 of P13K: (1) p85 nSH2 domain with the
C2, helical, and kinase domains of p110alpha and (2) p85
iSH2 domain with C2 domain of p110alpha. There are 3
inhibitory interactions between p110beta and p85 of
P13K: (1) p85 nSH2 domain with the C2, helical, and
kinase domains of p110beta, (2) p85 iSH2 domain with C2
domain of p110alpha, and (3) p85 cSH2 domain with the
kinase domain of p110alpha. It is interesting to note
that p110beta is oncogenic as a wild type protein while
p110alpha lacks this ability. One explanation is the
idea that the regulation of p110beta by p85 is unique
because of the addition of inhibitory contacts from the
cSH2 domain and the loss of contacts in the iSH2 domain.
In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 110
Score = 53.5 bits (129), Expect = 4e-09
Identities = 29/98 (29%), Positives = 55/98 (56%), Gaps = 5/98 (5%)
Query: 54 EMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDS 113
++ +WY+G I+R + + + +G FL+R + + GD++L+++ + K+
Sbjct: 3 SLQEAEWYWGDISREEVNEKMRDTPDGTFLVRDASTMKGDYTLTLRKGGNNKLIKIFH-R 61
Query: 114 SGKF-FLWVVKFNSLNELVEYHRTASVS---RSQDVKL 147
GK+ F + FNS+ EL+ Y+R S++ R DVKL
Sbjct: 62 DGKYGFSDPLTFNSVVELINYYRNNSLAEYNRKLDVKL 99
Score = 53.5 bits (129), Expect = 4e-09
Identities = 29/98 (29%), Positives = 55/98 (56%), Gaps = 5/98 (5%)
Query: 233 EMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDS 292
++ +WY+G I+R + + + +G FL+R + + GD++L+++ + K+
Sbjct: 3 SLQEAEWYWGDISREEVNEKMRDTPDGTFLVRDASTMKGDYTLTLRKGGNNKLIKIFH-R 61
Query: 293 SGKF-FLWVVKFNSLNELVEYHRTASVS---RSQDVKL 326
GK+ F + FNS+ EL+ Y+R S++ R DVKL
Sbjct: 62 DGKYGFSDPLTFNSVVELINYYRNNSLAEYNRKLDVKL 99
>gnl|CDD|212798 cd11864, SH3_PEX13_eumet, Src Homology 3 domain of eumetazoan
Peroxisomal biogenesis factor 13. PEX13 is a peroxin
and is required for protein import into the peroxisomal
matrix and membrane. It is an integral membrane protein
that is essential for the localization of PEX14 and the
import of proteins containing the peroxisome matrix
targeting signals, PTS1 and PTS2. Mutations of the
PEX13 gene in humans lead to a wide range of peroxisome
biogenesis disorders (PBDs), the most severe of which
is known as Zellweger syndrome (ZS), a severe
multisystem disorder characterized by hypotonia,
psychomotor retardation, and neuronal migration
defects. PEX13 contains two transmembrane regions and a
C-terminal SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 58
Score = 51.9 bits (125), Expect = 5e-09
Identities = 23/57 (40%), Positives = 35/57 (61%), Gaps = 4/57 (7%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNME---DDMNWYRAELDGKE-GLIPSNYIE 54
A A++DF A +EDELSFR L++ E W A +DG++ GL+P+NY++
Sbjct: 1 VARAEYDFVAESEDELSFRAGDKLRLAPKELQPRVRGWLLATVDGQKIGLVPANYVK 57
Score = 41.1 bits (97), Expect = 3e-05
Identities = 18/54 (33%), Positives = 26/54 (48%), Gaps = 5/54 (9%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQH----WWHGEIGARK-GLFPATYI 206
+A YDF + EL FR GD + + + Q W + +K GL PA Y+
Sbjct: 3 RAEYDFVAESEDELSFRAGDKLRLAPKELQPRVRGWLLATVDGQKIGLVPANYV 56
>gnl|CDD|212924 cd11991, SH3_Intersectin1_3, Third Src homology 3 domain (or SH3C)
of Intersectin-1. Intersectin-1 (ITSN1) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN1 localizes in membranous organelles, CCPs, the
Golgi complex, and may be involved in the cell membrane
trafficking system. It exists in alternatively spliced
short and long isoforms. The short isoform contains two
Eps15 homology domains (EH1 and EH2), a coiled-coil
region and five SH3 domains (SH3A-E), while the long
isoform, in addition, contains RhoGEF (also called
Dbl-homologous or DH), Pleckstrin homology (PH) and C2
domains. The third SH3 domain (or SH3C) of ITSN1 has
been shown to bind many proteins including dynamin1/2,
CIN85, c-Cbl, SHIP2, Reps1, synaptojanin-1, and WNK,
among others. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 52
Score = 51.5 bits (123), Expect = 5e-09
Identities = 21/48 (43%), Positives = 32/48 (66%), Gaps = 1/48 (2%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
A+Y + E G+L F++GDVI VT + D WW G +G + G+FP+ Y+
Sbjct: 4 AMYTYESNEQGDLTFQQGDVILVT-KKDGDWWTGTVGDKTGVFPSNYV 50
Score = 34.2 bits (78), Expect = 0.007
Identities = 15/54 (27%), Positives = 30/54 (55%), Gaps = 2/54 (3%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
E +A + + + + +L+F++ V IL + D +W+ + K G+ PSNY+
Sbjct: 1 EYVAMYTYESNEQGDLTFQQGDV--ILVTKKDGDWWTGTVGDKTGVFPSNYVRP 52
>gnl|CDD|212744 cd11810, SH3_RUSC1_like, Src homology 3 domain of RUN and SH3
domain-containing proteins 1 and 2. RUSC1 and RUSC2,
that were originally characterized in silico. They are
adaptor proteins consisting of RUN, leucine zipper, and
SH3 domains. RUSC1, also called NESCA (New molecule
containing SH3 at the carboxy-terminus), is highly
expressed in the brain and is translocated to the
nuclear membrane from the cytoplasm upon stimulation
with neurotrophin. It plays a role in facilitating
neurotrophin-dependent neurite outgrowth. It also
interacts with NEMO (or IKKgamma) and may function in
NEMO-mediated activation of NF-kB. RUSC2, also called
Iporin, is expressed ubiquitously with highest amounts
in the brain and testis. It interacts with the small
GTPase Rab1 and the Golgi matrix protein GM130, and may
function in linking GTPases to certain intracellular
signaling pathways. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 50
Score = 51.3 bits (123), Expect = 5e-09
Identities = 19/49 (38%), Positives = 27/49 (55%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATY 205
V+AL + G+L FR+GD++ V R D W G+ KGL P +Y
Sbjct: 2 VRALCHHVATDSGQLSFRKGDILRVIARVDDDWLLCTRGSTKGLVPLSY 50
Score = 39.0 bits (91), Expect = 1e-04
Identities = 16/51 (31%), Positives = 25/51 (49%), Gaps = 1/51 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNY 52
A AT +LSFRK +L+++ DD +W +GL+P +Y
Sbjct: 1 VVRALCHHVATDSGQLSFRKGDILRVIARVDD-DWLLCTRGSTKGLVPLSY 50
Score = 28.6 bits (64), Expect = 0.66
Identities = 7/19 (36%), Positives = 11/19 (57%)
Query: 336 VQALYDFTPQEPGELEFRR 354
V+AL + G+L FR+
Sbjct: 2 VRALCHHVATDSGQLSFRK 20
>gnl|CDD|198282 cd10419, SH2_Src_Fyn_isoform_b_like, Src homology 2 (SH2) domain
found in Fyn isoform b like proteins. Fyn is a member
of the Src non-receptor type tyrosine kinase family of
proteins. This cd contains the SH2 domain found in Fyn
isoform b type proteins. Fyn is involved in the control
of cell growth and is required in the following
pathways: T and B cell receptor signaling,
integrin-mediated signaling, growth factor and cytokine
receptor signaling, platelet activation, ion channel
function, cell adhesion, axon guidance, fertilization,
entry into mitosis, and differentiation of natural
killer cells, oligodendrocytes and keratinocytes. The
protein associates with the p85 subunit of
phosphatidylinositol 3-kinase and interacts with the
Fyn-binding protein. Alternatively spliced transcript
variants encoding distinct isoforms exist. Fyn is
primarily localized to the cytoplasmic leaflet of the
plasma membrane. Tyrosine phosphorylation of target
proteins by Fyn serves to either regulate target protein
activity, and/or to generate a binding site on the
target protein that recruits other signaling molecules.
FYN has been shown to interact with a number of proteins
including: BCAR1, Cbl, Janus kinase, nephrin, Sky,
tyrosine kinase, Wiskott-Aldrich syndrome protein, and
Zap-70. Fyn has a unique N-terminal domain, an SH3
domain, an SH2 domain, a kinase domain and a regulatory
tail, as do the other members of the family. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 53.1 bits (127), Expect = 5e-09
Identities = 32/83 (38%), Positives = 52/83 (62%), Gaps = 8/83 (9%)
Query: 60 WYYGRITRADAER-LLS-NKHEGAFLIRVSESSPGDFSLSVK-----CSDGVQHFKVLR- 111
WY+G++ R DAER LLS G FLIR SE++ G +SLS++ D V+H+K+ +
Sbjct: 5 WYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIRKL 64
Query: 112 DSSGKFFLWVVKFNSLNELVEYH 134
D+ G + +F +L +LV+++
Sbjct: 65 DNGGYYITTRAQFETLQQLVQHY 87
Score = 53.1 bits (127), Expect = 5e-09
Identities = 32/83 (38%), Positives = 52/83 (62%), Gaps = 8/83 (9%)
Query: 239 WYYGRITRADAER-LLS-NKHEGAFLIRVSESSPGDFSLSVK-----CSDGVQHFKVLR- 290
WY+G++ R DAER LLS G FLIR SE++ G +SLS++ D V+H+K+ +
Sbjct: 5 WYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIRKL 64
Query: 291 DSSGKFFLWVVKFNSLNELVEYH 313
D+ G + +F +L +LV+++
Sbjct: 65 DNGGYYITTRAQFETLQQLVQHY 87
>gnl|CDD|212790 cd11856, SH3_p47phox_like, Src homology 3 domains of the p47phox
subunit of NADPH oxidase and similar domains. This
family is composed of the tandem SH3 domains of p47phox
subunit of NADPH oxidase and Nox Organizing protein 1
(NoxO1), the four SH3 domains of Tks4 (Tyr kinase
substrate with four SH3 domains), the five SH3 domains
of Tks5, the SH3 domain of obscurin, Myosin-I, and
similar domains. Most members of this group also contain
Phox homology (PX) domains, except for obscurin and
Myosin-I. p47phox and NoxO1 are regulators of the
phagocytic NADPH oxidase complex (also called Nox2 or
gp91phox) and nonphagocytic NADPH oxidase Nox1,
respectively. They play roles in the activation of their
respective NADPH oxidase, which catalyzes the transfer
of electrons from NADPH to molecular oxygen to form
superoxide. Tks proteins are Src substrates and
scaffolding proteins that play important roles in the
formation of podosomes and invadopodia, the dynamic
actin-rich structures that are related to cell migration
and cancer cell invasion. Obscurin is a giant muscle
protein that plays important roles in the organization
and assembly of the myofibril and the sarcoplasmic
reticulum. Type I myosins (Myosin-I) are actin-dependent
motors in endocytic actin structures and actin patches.
They play roles in membrane traffic in endocytic and
secretory pathways, cell motility, and mechanosensing.
Myosin-I contains an N-terminal actin-activated ATPase,
a phospholipid-binding TH1 (tail homology 1) domain, and
a C-terminal extension which includes an F-actin-binding
TH2 domain, an SH3 domain, and an acidic peptide that
participates in activating the Arp2/3complex. The SH3
domain of myosin-I is required for myosin-I-induced
actin polymerization. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 51.5 bits (124), Expect = 5e-09
Identities = 15/48 (31%), Positives = 29/48 (60%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
A+ D+ Q E+ + G+V+ V +++D WW+ G ++G PA+Y+
Sbjct: 4 AIADYEAQGDDEISLQEGEVVEVLEKNDSGWWYVRKGDKEGWVPASYL 51
Score = 41.9 bits (99), Expect = 1e-05
Identities = 16/52 (30%), Positives = 33/52 (63%), Gaps = 3/52 (5%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMN-WYRAELDGKEGLIPSNYIE 54
+A D+ A +DE+S ++ +V+++L E + + W+ KEG +P++Y+E
Sbjct: 3 VAIADYEAQGDDEISLQEGEVVEVL--EKNDSGWWYVRKGDKEGWVPASYLE 52
>gnl|CDD|212692 cd11758, SH3_CRK_N, N-terminal Src Homology 3 domain of Ct10
Regulator of Kinase adaptor proteins. CRK adaptor
proteins consists of SH2 and SH3 domains, which bind
tyrosine-phosphorylated peptides and proline-rich
motifs, respectively. They function downstream of
protein tyrosine kinases in many signaling pathways
started by various extracellular signals, including
growth and differentiation factors. Cellular CRK
(c-CRK) contains a single SH2 domain, followed by
N-terminal and C-terminal SH3 domains. It is involved
in the regulation of many cellular processes including
cell growth, motility, adhesion, and apoptosis. CRK has
been implicated in the malignancy of various human
cancers. The N-terminal SH3 domain of CRK binds a
number of target proteins including DOCK180, C3G, SOS,
and cABL. The CRK family includes two alternatively
spliced protein forms, CRKI and CRKII, that are
expressed by the CRK gene, and the CRK-like (CRKL)
protein, which is expressed by a distinct gene (CRKL).
SH3 domains are protein interaction domains that bind
to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 51.2 bits (123), Expect = 6e-09
Identities = 15/51 (29%), Positives = 28/51 (54%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A DF +++L F+K ++L ++ ++ W +GK G+IP Y+E
Sbjct: 4 RALFDFPGNDDEDLPFKKGEILTVIRKPEEQWWNARNSEGKTGMIPVPYVE 54
Score = 50.4 bits (121), Expect = 1e-08
Identities = 21/77 (27%), Positives = 36/77 (46%), Gaps = 25/77 (32%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWY 216
V+AL+DF + +L F++G+++TV + ++ WW+ N E
Sbjct: 3 VRALFDFPGNDDEDLPFKKGEILTVIRKPEEQWWNAR--------------NSE------ 42
Query: 217 RAELDGKEGLIPSNYIE 233
GK G+IP Y+E
Sbjct: 43 -----GKTGMIPVPYVE 54
>gnl|CDD|199832 cd10417, SH2_SH2D7, Src homology 2 domain found in the SH2 domain
containing protein 7 (SH2D7). SH2D7 contains a single
SH2 domain. In general SH2 domains are involved in
signal transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 102
Score = 52.6 bits (126), Expect = 6e-09
Identities = 28/83 (33%), Positives = 48/83 (57%), Gaps = 5/83 (6%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
W++G ITR E+LL +K G+FLIR+S+ + G + LS + SD +HF V+ + +L
Sbjct: 9 WFHGFITRKQTEQLLRDKALGSFLIRLSDRATG-YILSYRGSDRCRHF-VINQLRNRRYL 66
Query: 120 W---VVKFNSLNELVEYHRTASV 139
++L ELV +++ +
Sbjct: 67 ISGDTSSHSTLAELVRHYQEVQL 89
Score = 52.6 bits (126), Expect = 6e-09
Identities = 28/83 (33%), Positives = 48/83 (57%), Gaps = 5/83 (6%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
W++G ITR E+LL +K G+FLIR+S+ + G + LS + SD +HF V+ + +L
Sbjct: 9 WFHGFITRKQTEQLLRDKALGSFLIRLSDRATG-YILSYRGSDRCRHF-VINQLRNRRYL 66
Query: 299 W---VVKFNSLNELVEYHRTASV 318
++L ELV +++ +
Sbjct: 67 ISGDTSSHSTLAELVRHYQEVQL 89
>gnl|CDD|198227 cd10364, SH2_Src_Lyn, Src homology 2 (SH2) domain found in Lyn.
Lyn is a member of the Src non-receptor type tyrosine
kinase family of proteins and is expressed in the
hematopoietic cells, in neural tissues, liver, and
adipose tissue. There are two alternatively spliced
forms of Lyn. Lyn plays an inhibitory role in myeloid
lineage proliferation. Following engagement of the B
cell receptors, Lyn undergoes rapid phosphorylation and
activation, triggering a cascade of signaling events
mediated by Lyn phosphorylation of tyrosine residues
within the immunoreceptor tyrosine-based activation
motifs (ITAM) of the receptor proteins, and subsequent
recruitment and activation of other kinases including
Syk, phospholipase C2 (PLC2) and phosphatidyl inositol-3
kinase. These kinases play critical roles in
proliferation, Ca2+ mobilization and cell
differentiation. Lyn plays an essential role in the
transmission of inhibitory signals through
phosphorylation of tyrosine residues within the
immunoreceptor tyrosine-based inhibitory motifs (ITIM)
in regulatory proteins such as CD22, PIR-B and FC RIIb1.
Their ITIM phosphorylation subsequently leads to
recruitment and activation of phosphatases such as
SHIP-1 and SHP-1 which further down modulate signaling
pathways, attenuate cell activation and can mediate
tolerance. Lyn also plays a role in the insulin
signaling pathway. Activated Lyn phosphorylates insulin
receptor substrate 1 (IRS1) leading to an increase in
translocation of Glut-4 to the cell membrane and
increased glucose utilization. It is the primary Src
family member involved in signaling downstream of the B
cell receptor. Lyn plays an unusual, 2-fold role in B
cell receptor signaling; it is essential for initiation
of signaling but is also later involved in negative
regulation of the signal. Lyn has a unique N-terminal
domain, an SH3 domain, an SH2 domain, a kinase domain
and a regulatory tail, as do the other members of the
family. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 101
Score = 52.7 bits (126), Expect = 6e-09
Identities = 29/88 (32%), Positives = 51/88 (57%), Gaps = 8/88 (9%)
Query: 59 DWYYGRITRADAER--LLSNKHEGAFLIRVSESSPGDFSLSVKCSDG-----VQHFKVLR 111
+W++ ITR DAER L GAFLIR SE+ G +SLSV+ D ++H+K+
Sbjct: 4 EWFFKDITRKDAERQLLAPGNSAGAFLIRESETLKGSYSLSVRDYDPQHGDVIKHYKIRS 63
Query: 112 -DSSGKFFLWVVKFNSLNELVEYHRTAS 138
D+ G + + F +++++++++ S
Sbjct: 64 LDNGGYYISPRITFPCISDMIKHYQKQS 91
Score = 52.7 bits (126), Expect = 6e-09
Identities = 29/88 (32%), Positives = 51/88 (57%), Gaps = 8/88 (9%)
Query: 238 DWYYGRITRADAER--LLSNKHEGAFLIRVSESSPGDFSLSVKCSDG-----VQHFKVLR 290
+W++ ITR DAER L GAFLIR SE+ G +SLSV+ D ++H+K+
Sbjct: 4 EWFFKDITRKDAERQLLAPGNSAGAFLIRESETLKGSYSLSVRDYDPQHGDVIKHYKIRS 63
Query: 291 -DSSGKFFLWVVKFNSLNELVEYHRTAS 317
D+ G + + F +++++++++ S
Sbjct: 64 LDNGGYYISPRITFPCISDMIKHYQKQS 91
>gnl|CDD|199830 cd10349, SH2_SH2D2A_SH2D7, Src homology 2 domain found in the SH2
domain containing protein 2A and 7 (SH2D2A and SH2D7).
SH2D2A and SH7 both contain a single SH2 domain. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 77
Score = 51.4 bits (123), Expect = 9e-09
Identities = 25/77 (32%), Positives = 42/77 (54%), Gaps = 3/77 (3%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
W++G ITR +AERLL K +G +L+R SES+ F LS + +HF + + G+ +
Sbjct: 2 WFHGFITRREAERLLEPKPQGCYLVRFSESAVT-FVLSYRSRTCCRHFLLAQLRDGRHVV 60
Query: 120 W--VVKFNSLNELVEYH 134
L +L+ ++
Sbjct: 61 LGEDSAHARLQDLLLHY 77
Score = 51.4 bits (123), Expect = 9e-09
Identities = 25/77 (32%), Positives = 42/77 (54%), Gaps = 3/77 (3%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
W++G ITR +AERLL K +G +L+R SES+ F LS + +HF + + G+ +
Sbjct: 2 WFHGFITRREAERLLEPKPQGCYLVRFSESAVT-FVLSYRSRTCCRHFLLAQLRDGRHVV 60
Query: 299 W--VVKFNSLNELVEYH 313
L +L+ ++
Sbjct: 61 LGEDSAHARLQDLLLHY 77
>gnl|CDD|212705 cd11771, SH3_Pex13p_fungal, Src Homology 3 domain of fungal
peroxisomal membrane protein Pex13p. Pex13p, located in
the peroxisomal membrane, contains two transmembrane
regions and a C-terminal SH3 domain. It binds to the
peroxisomal targeting type I (PTS1) receptor Pex5p and
the docking factor Pex14p through its SH3 domain. It is
essential for both PTS1 and PTS2 protein import pathways
into the peroxisomal matrix. Pex13p binds Pex14p, which
contains a PxxP motif, in a classical fashion to the
proline-rich ligand binding site of its SH3 domain. It
binds the WxxxF/Y motif of Pex5p in a novel site that
does not compete with Pex14p binding. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 60
Score = 50.7 bits (122), Expect = 1e-08
Identities = 24/79 (30%), Positives = 37/79 (46%), Gaps = 23/79 (29%)
Query: 157 VQALYDFTPQEPG-ELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNW 215
+ALYDFTP+ P EL ++GD++ V ++D + D W
Sbjct: 2 CRALYDFTPENPEMELSLKKGDIVAVLSKTDP---------------------LGRDSEW 40
Query: 216 YRAEL-DGKEGLIPSNYIE 233
++ DG+ G PSNY+E
Sbjct: 41 WKGRTRDGRIGWFPSNYVE 59
Score = 41.1 bits (97), Expect = 2e-05
Identities = 19/56 (33%), Positives = 30/56 (53%), Gaps = 6/56 (10%)
Query: 5 AKHDFNATA-EDELSFRKSQVLKILN----MEDDMNWYRAEL-DGKEGLIPSNYIE 54
A +DF E ELS +K ++ +L+ + D W++ DG+ G PSNY+E
Sbjct: 4 ALYDFTPENPEMELSLKKGDIVAVLSKTDPLGRDSEWWKGRTRDGRIGWFPSNYVE 59
Score = 28.0 bits (63), Expect = 1.4
Identities = 10/21 (47%), Positives = 14/21 (66%), Gaps = 1/21 (4%)
Query: 336 VQALYDFTPQEPG-ELEFRRD 355
+ALYDFTP+ P EL ++
Sbjct: 2 CRALYDFTPENPEMELSLKKG 22
>gnl|CDD|212806 cd11873, SH3_CD2AP-like_1, First Src Homology 3 domain (SH3A) of
CD2-associated protein and similar proteins. This
subfamily is composed of the first SH3 domain (SH3A) of
CD2AP, CIN85 (Cbl-interacting protein of 85 kDa), and
similar domains. CD2AP and CIN85 are adaptor proteins
that bind to protein partners and assemble complexes
that have been implicated in T cell activation, kidney
function, and apoptosis of neuronal cells. They also
associate with endocytic proteins, actin cytoskeleton
components, and other adaptor proteins involved in
receptor tyrosine kinase (RTK) signaling. CD2AP and the
main isoform of CIN85 contain three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CD2AP and CIN85 to
bind various protein partners and assemble complexes
that have been implicated in many different functions.
SH3A of both proteins bind to an atypical PXXXPR motif
at the C-terminus of Cbl and the cytoplasmic domain of
the cell adhesion protein CD2. CIN85 SH3A binds to
internal proline-rich motifs within the proline-rich
region; this intramolecular interaction serves as a
regulatory mechanism to keep CIN85 in a closed
conformation, preventing the recruitment of other
proteins. CIN85 SH3A has also been shown to bind
ubiquitin. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 50.7 bits (122), Expect = 1e-08
Identities = 16/50 (32%), Positives = 30/50 (60%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V +D+ +EP EL + GD+IT + ++ WW G + ++G+FP ++
Sbjct: 2 VIVEFDYDAEEPDELTLKVGDIITNVKKMEEGWWEGTLNGKRGMFPDNFV 51
Score = 45.7 bits (109), Expect = 6e-07
Identities = 14/53 (26%), Positives = 30/53 (56%), Gaps = 1/53 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
E I + D++A DEL+ + ++ + ++ W+ L+GK G+ P N+++
Sbjct: 1 EVIVEFDYDAEEPDELTLKVGDIITNVKKMEE-GWWEGTLNGKRGMFPDNFVK 52
>gnl|CDD|212892 cd11959, SH3_Cortactin, Src homology 3 domain of Cortactin.
Cortactin was originally identified as a substrate of
Src kinase. It is an actin regulatory protein that
binds to the Arp2/3 complex and stabilizes branched
actin filaments. It is involved in cellular processes
that affect cell motility, adhesion, migration,
endocytosis, and invasion. It is expressed ubiquitously
except in hematopoietic cells, where the homolog
hematopoietic lineage cell-specific 1 (HS1) is
expressed instead. Cortactin contains an N-terminal
acidic domain, several copies of a repeat domain found
in cortactin and HS1, a proline-rich region, and a
C-terminal SH3 domain. The N-terminal region interacts
with the Arp2/3 complex and F-actin, and is crucial in
regulating branched actin assembly. Cortactin also
serves as a scaffold and provides a bridge to the actin
cytoskeleton for membrane trafficking and signaling
proteins that bind to its SH3 domain. Binding partners
for the SH3 domain of cortactin include dynamin2,
N-WASp, MIM, FGD1, among others. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 53
Score = 50.5 bits (121), Expect = 1e-08
Identities = 20/53 (37%), Positives = 33/53 (62%), Gaps = 1/53 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
A+A +D+ A +DE+SF ++ + M D+ W+R GK GL P+NY+E+
Sbjct: 2 AVALYDYQAADDDEISFDPDDIITNIEMIDE-GWWRGVCRGKYGLFPANYVEL 53
Score = 48.2 bits (115), Expect = 7e-08
Identities = 19/48 (39%), Positives = 27/48 (56%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
ALYD+ + E+ F D+IT + D+ WW G + GLFPA Y+
Sbjct: 4 ALYDYQAADDDEISFDPDDIITNIEMIDEGWWRGVCRGKYGLFPANYV 51
>gnl|CDD|212747 cd11813, SH3_SGSM3, Src Homology 3 domain of Small G protein
Signaling Modulator 3. SGSM3 is also called
Merlin-associated protein (MAP), RUN and SH3
domain-containing protein (RUSC3), RUN and TBC1
domain-containing protein 3 (RUTBC3), Rab
GTPase-activating protein 5 (RabGAP5), or Rab GAP-like
protein (RabGAPLP). It is expressed ubiquitously and
functions as a regulator of small G protein RAP- and
RAB-mediated neuronal signaling. It is involved in
modulating NGF-mediated neurite outgrowth and
differentiation. It also interacts with the tumor
suppressor merlin and may play a role in the
merlin-associated suppression of cell growth. SGSM3
contains TBC, SH3, and RUN domains. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 53
Score = 50.6 bits (121), Expect = 1e-08
Identities = 20/49 (40%), Positives = 31/49 (63%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+AL DF + EL FR+ D+IT+ + D+H W GE+ +G FPA ++
Sbjct: 3 KALLDFERHDDDELGFRKNDIITIISQKDEHCWVGELNGLRGWFPAKFV 51
Score = 40.6 bits (95), Expect = 4e-05
Identities = 17/48 (35%), Positives = 30/48 (62%), Gaps = 1/48 (2%)
Query: 8 DFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
DF +DEL FRK+ ++ I++ +D+ W EL+G G P+ ++E+
Sbjct: 7 DFERHDDDELGFRKNDIITIISQKDEHCWV-GELNGLRGWFPAKFVEL 53
>gnl|CDD|198269 cd10406, SH2_Vav2, Src homology 2 (SH2) domain found in the Vav2
proteins. Proto-oncogene vav is a member of the Dbl
family of guanine nucleotide exchange factors (GEF) for
the Rho family of GTP binding proteins. All vavs are
activated by tyrosine phosphorylation leading to their
activation. There are three Vav mammalian family
members: Vav1 which is expressed in the hematopoietic
system, and Vav2 and Vav3 are more ubiquitously
expressed. Vav2 is a GEF for RhoA, RhoB and RhoG and may
activate Rac1 and Cdc42. Vav2 has been shown to interact
with CD19 and Grb2. Alternatively spliced transcript
variants encoding different isoforms have been found for
Vav2. Vav proteins are involved in several processes
that require cytoskeletal reorganization, such as the
formation of the immunological synapse (IS),
phagocytosis, platelet aggregation, spreading, and
transformation. Vavs function as guanine nucleotide
exchange factors (GEFs) for the Rho/Rac family of
GTPases. Vav family members have several conserved
motifs/domains including: a leucine-rich region, a
leucine-zipper, a calponin homology (CH) domain, an
acidic domain, a Dbl-homology (DH) domain, a pleckstrin
homology (PH) domain, a cysteine-rich domain, 2 SH3
domains, a proline-rich region, and a SH2 domain. Vavs
are the only known Rho GEFs that have both the DH/PH
motifs and SH2/SH3 domains in the same protein. The
leucine-rich helix-loop-helix (HLH) domain is thought to
be involved in protein heterodimerization with other HLH
proteins and it may function as a negative regulator by
forming inactive heterodimers. The CH domain is usually
involved in the association with filamentous actin, but
in Vav it controls NFAT stimulation, Ca2+ mobilization,
and its transforming activity. Acidic domains are
involved in protein-protein interactions and contain
regulatory tyrosines. The DH domain is a GDP-GTP
exchange factor on Rho/Rac GTPases. The PH domain in
involved in interactions with GTP-binding proteins,
lipids and/or phosphorylated serine/threonine residues.
The SH3 domain is involved in localization of proteins
to specific sites within the cell interacting with
protein with proline-rich sequences. The SH2 domain
mediates a high affinity interaction with tyrosine
phosphorylated proteins. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 51.6 bits (123), Expect = 1e-08
Identities = 28/83 (33%), Positives = 44/83 (53%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
W+ G + R + LL + G +LIR + F++S+K +D V+H KV+ +
Sbjct: 7 WFAGNMERQQTDNLLKSHASGTYLIRERPAEAERFAISIKFNDEVKHIKVVEKDNWIHIT 66
Query: 120 WVVKFNSLNELVEYHRTASVSRS 142
KF SL ELVEY++ S+ S
Sbjct: 67 EAKKFESLLELVEYYQCHSLKES 89
Score = 51.6 bits (123), Expect = 1e-08
Identities = 28/83 (33%), Positives = 44/83 (53%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
W+ G + R + LL + G +LIR + F++S+K +D V+H KV+ +
Sbjct: 7 WFAGNMERQQTDNLLKSHASGTYLIRERPAEAERFAISIKFNDEVKHIKVVEKDNWIHIT 66
Query: 299 WVVKFNSLNELVEYHRTASVSRS 321
KF SL ELVEY++ S+ S
Sbjct: 67 EAKKFESLLELVEYYQCHSLKES 89
>gnl|CDD|212697 cd11763, SH3_SNX9_like, Src Homology 3 domain of Sorting Nexin 9
and similar proteins. Sorting nexins (SNXs) are Phox
homology (PX) domain containing proteins that are
involved in regulating membrane traffic and protein
sorting in the endosomal system. SNXs differ from each
other in their lipid-binding specificity, subcellular
localization and specific function in the endocytic
pathway. This subfamily consists of SH3 domain
containing SNXs including SNX9, SNX18, SNX33, and
similar proteins. SNX9 is localized to plasma membrane
endocytic sites and acts primarily in clathrin-mediated
endocytosis, while SNX18 is localized to peripheral
endosomal structures, and acts in a trafficking pathway
that is clathrin-independent but relies on AP-1 and
PACS1. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 50.0 bits (120), Expect = 1e-08
Identities = 22/53 (41%), Positives = 29/53 (54%), Gaps = 2/53 (3%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVT-DRSDQHWWHGE-IGARKGLFPATYI 206
V+ALYDF Q GEL R G+V+T+T W G GLFP++Y+
Sbjct: 1 KVRALYDFDSQPSGELSLRAGEVLTITRQDVGDGWLEGRNSRGEVGLFPSSYV 53
Score = 43.1 bits (102), Expect = 5e-06
Identities = 18/51 (35%), Positives = 26/51 (50%), Gaps = 1/51 (1%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAE-LDGKEGLIPSNYIE 54
A +DF++ ELS R +VL I + W G+ GL PS+Y+E
Sbjct: 4 ALYDFDSQPSGELSLRAGEVLTITRQDVGDGWLEGRNSRGEVGLFPSSYVE 54
Score = 29.6 bits (67), Expect = 0.32
Identities = 11/21 (52%), Positives = 12/21 (57%)
Query: 335 LVQALYDFTPQEPGELEFRRD 355
V+ALYDF Q GEL R
Sbjct: 1 KVRALYDFDSQPSGELSLRAG 21
>gnl|CDD|212712 cd11778, SH3_Bzz1_2, Second Src Homology 3 domain of Bzz1 and
similar domains. Bzz1 (or Bzz1p) is a
WASP/Las17-interacting protein involved in endocytosis
and trafficking to the vacuole. It physically interacts
with type I myosins and functions in the early steps of
endocytosis. Together with other proteins, it induces
membrane scission in yeast. Bzz1 contains an N-terminal
F-BAR (FES-CIP4 Homology and Bin/Amphiphysin/Rvs), a
central coiled-coil, and two C-terminal SH3 domains.
This model represents the second C-terminal SH3 domain.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 51
Score = 50.2 bits (120), Expect = 2e-08
Identities = 22/50 (44%), Positives = 27/50 (54%), Gaps = 1/50 (2%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITV-TDRSDQHWWHGEIGARKGLFPATY 205
V+ALYD+ Q E+ R GD I V W +GEI KGLFP +Y
Sbjct: 2 VEALYDYEAQGDDEISIRVGDRIAVIRGDDGSGWTYGEINGVKGLFPTSY 51
Score = 44.0 bits (104), Expect = 2e-06
Identities = 16/52 (30%), Positives = 31/52 (59%), Gaps = 2/52 (3%)
Query: 1 MEAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNY 52
+EA+ +D+ A +DE+S R + ++ +D W E++G +GL P++Y
Sbjct: 2 VEAL--YDYEAQGDDEISIRVGDRIAVIRGDDGSGWTYGEINGVKGLFPTSY 51
>gnl|CDD|212979 cd12046, SH3_p67phox_C, C-terminal (or second) Src Homology 3
domain of the p67phox subunit of NADPH oxidase.
p67phox, also called Neutrophil cytosol factor 2
(NCF-2), is a cytosolic subunit of the phagocytic NADPH
oxidase complex (also called Nox2 or gp91phox) which
plays a crucial role in the cellular response to
bacterial infection. NADPH oxidase catalyzes the
transfer of electrons from NADPH to oxygen during
phagocytosis forming superoxide and reactive oxygen
species. p67phox plays a regulatory role and contains
N-terminal TPR, first SH3 (or N-terminal or central
SH3), PB1, and C-terminal SH3 domains. It binds, via its
C-terminal SH3 domain, to a proline-rich region of
p47phox and upon activation, this complex assembles with
flavocytochrome b558, the Nox2-p22phox heterodimer.
Concurrently, RacGTP translocates to the membrane and
interacts with the TPR domain of p67phox, which leads to
the activation of NADPH oxidase. The PB1 domain of
p67phox binds to its partner PB1 domain in p40phox, and
this facilitates the assembly of p47phox-p67phox at the
membrane. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 50.2 bits (120), Expect = 2e-08
Identities = 17/51 (33%), Positives = 32/51 (62%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V AL+ + +P +LEF++GDVI V + ++ W G+ + G+FP+ ++
Sbjct: 1 QVVALFSYEASQPEDLEFQKGDVILVLSKVNEDWLEGQCKGKIGIFPSAFV 51
Score = 37.1 bits (86), Expect = 7e-04
Identities = 14/51 (27%), Positives = 30/51 (58%), Gaps = 1/51 (1%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
+A + A+ ++L F+K V+ +L+ ++ +W + GK G+ PS ++E
Sbjct: 3 VALFSYEASQPEDLEFQKGDVILVLSKVNE-DWLEGQCKGKIGIFPSAFVE 52
>gnl|CDD|212759 cd11825, SH3_PLCgamma, Src homology 3 domain of Phospholipase C
(PLC) gamma. PLC catalyzes the hydrolysis of
phosphatidylinositol (4,5)-bisphosphate [PtdIns(4,5)P2]
to produce Ins(1,4,5)P3 and diacylglycerol (DAG) in
response to various receptors. Ins(1,4,5)P3 initiates
the calcium signaling cascade while DAG functions as an
activator of PKC. PLCgamma catalyzes this reaction in
tyrosine kinase-dependent signaling pathways. It is
activated and recruited to its substrate at the
membrane. Vertebrates contain two forms of PLCgamma,
PLCgamma1, which is widely expressed, and PLCgamma2,
which is primarily found in haematopoietic cells.
PLCgamma contains a Pleckstrin homology (PH) domain
followed by an elongation factor (EF) domain, two
catalytic regions of PLC domains that flank two tandem
SH2 domains, followed by a SH3 domain and C2 domain. The
SH3 domain of PLCgamma1 directly interacts with
dynamin-1 and can serve as a guanine nucleotide exchange
factor (GEF). It also interacts with Cbl, inhibiting its
phosphorylation and activity. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 50.0 bits (120), Expect = 2e-08
Identities = 22/51 (43%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARK-GLFPATYI 206
V+ALYD+ Q P EL F + +IT ++ D WW G+ G +K FPA Y+
Sbjct: 2 VKALYDYRAQRPDELSFCKHAIITNVEKEDGGWWRGDYGGKKQKWFPANYV 52
Score = 38.9 bits (91), Expect = 1e-04
Identities = 19/51 (37%), Positives = 29/51 (56%), Gaps = 2/51 (3%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGK-EGLIPSNYIE 54
A +D+ A DELSF K ++ + ED W+R + GK + P+NY+E
Sbjct: 4 ALYDYRAQRPDELSFCKHAIITNVEKEDGG-WWRGDYGGKKQKWFPANYVE 53
Score = 26.1 bits (58), Expect = 5.7
Identities = 11/24 (45%), Positives = 14/24 (58%)
Query: 336 VQALYDFTPQEPGELEFRRDLKIK 359
V+ALYD+ Q P EL F + I
Sbjct: 2 VKALYDYRAQRPDELSFCKHAIIT 25
>gnl|CDD|213006 cd12073, SH3_HS1, Src homology 3 domain of Hematopoietic lineage
cell-specific protein 1. HS1, also called HCLS1
(hematopoietic cell-specific Lyn substrate 1), is a
cortactin homolog expressed specifically in
hematopoietic cells. It is an actin regulatory protein
that binds the Arp2/3 complex and stabilizes branched
actin filaments. It is required for cell spreading and
signaling in lymphocytes. It regulates cytoskeletal
remodeling that controls lymphocyte trafficking, and it
also affects tissue invasion and infiltration of
leukemic B cells. Like cortactin, HS1 contains an
N-terminal acidic domain, several copies of a repeat
domain found in cortactin and HS1, a proline-rich
region, and a C-terminal SH3 domain. The N-terminal
region binds the Arp2/3 complex and F-actin, while the
C-terminal region acts as an adaptor or scaffold that
can connect varied proteins that bind the SH3 domain
within the actin network. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 49.8 bits (119), Expect = 2e-08
Identities = 18/48 (37%), Positives = 26/48 (54%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
ALYD+ + E+ F + IT + D+ WW G +GLFPA Y+
Sbjct: 5 ALYDYQGEGDDEISFDPQETITDIEMVDEGWWKGTCHGHRGLFPANYV 52
Score = 45.6 bits (108), Expect = 7e-07
Identities = 17/53 (32%), Positives = 31/53 (58%), Gaps = 1/53 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
A+A +D+ +DE+SF + + + M D+ W++ G GL P+NY+E+
Sbjct: 3 AVALYDYQGEGDDEISFDPQETITDIEMVDE-GWWKGTCHGHRGLFPANYVEL 54
>gnl|CDD|212980 cd12047, SH3_Noxa1_C, C-terminal Src Homology 3 domain of NADPH
oxidase activator 1. Noxa1 is a homolog of p67phox and
is a cytosolic subunit of the nonphagocytic NADPH
oxidase complex Nox1, which catalyzes the transfer of
electrons from NADPH to molecular oxygen to form
superoxide. Noxa1 is co-expressed with Nox1 in colon,
stomach, uterus, prostate, and vascular smooth muscle
cells, consistent with its regulatory role. It does not
interact with p40phox, unlike p67phox, making Nox1
activity independent of p40phox, unlike Nox2. Noxa1
contains TPR, PB1, and C-terminal SH3 domains, but lacks
the central SH3 domain that is present in p67phox. The
TPR domain binds activated GTP-bound Rac. The C-terminal
SH3 domain binds the polyproline motif found at the
C-terminus of Noxo1, a homolog of p47phox. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 49.8 bits (119), Expect = 2e-08
Identities = 17/49 (34%), Positives = 27/49 (55%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATY 205
+ A +D++ Q P +LEF +GD I + +Q W G R G+FP +
Sbjct: 2 MVAQHDYSAQGPEDLEFSQGDTIDILSEVNQEWLEGHCDGRIGIFPKCF 50
Score = 34.8 bits (80), Expect = 0.005
Identities = 14/47 (29%), Positives = 26/47 (55%), Gaps = 1/47 (2%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPS 50
+A+HD++A ++L F + + IL+ E + W DG+ G+ P
Sbjct: 3 VAQHDYSAQGPEDLEFSQGDTIDILS-EVNQEWLEGHCDGRIGIFPK 48
>gnl|CDD|212709 cd11775, SH3_Sla1p_3, Third Src Homology 3 domain of the fungal
endocytic adaptor protein Sla1p. Sla1p facilitates
endocytosis by playing a role as an adaptor protein in
coupling components of the actin cytoskeleton to the
endocytic machinery. It interacts with Abp1p, Las17p
and Pan1p, which are activator proteins of
actin-related protein 2/3 (Arp2/3). Sla1p contains
multiple domains including three SH3 domains, a SAM
(sterile alpha motif) domain, and a Sla1 homology
domain 1 (SHD1), which binds to the NPFXD motif that is
found in many integral membrane proteins such as the
Golgi-localized Arf-binding protein Lsb5p and the
P4-ATPases, Drs2p and Dnf1p. The third SH3 domain of
Sla1p can bind ubiquitin while retaining the ability to
bind proline-rich ligands; monoubiquitination of target
proteins signals internalization and sorting through
the endocytic pathway. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 57
Score = 49.6 bits (119), Expect = 2e-08
Identities = 19/55 (34%), Positives = 35/55 (63%), Gaps = 2/55 (3%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELD--GKEGLIPSNYIE 54
+DF+A ++DEL+ ++ V+ IL+ + +W+ E GKEG++P++YIE
Sbjct: 2 RGKVLYDFDAQSDDELTVKEGDVVYILDDKKSKDWWMVENVSTGKEGVVPASYIE 56
Score = 39.2 bits (92), Expect = 1e-04
Identities = 23/79 (29%), Positives = 34/79 (43%), Gaps = 27/79 (34%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWY 216
+ LYDF Q EL + GDV+ YIL+ + +W+
Sbjct: 3 GKVLYDFDAQSDDELTVKEGDVV-------------------------YILDDKKSKDWW 37
Query: 217 RAELD--GKEGLIPSNYIE 233
E GKEG++P++YIE
Sbjct: 38 MVENVSTGKEGVVPASYIE 56
>gnl|CDD|212778 cd11844, SH3_CAS, Src homology 3 domain of CAS (Crk-Associated
Substrate) scaffolding proteins. CAS proteins function
as molecular scaffolds to regulate protein complexes
that are involved in many cellular processes including
migration, chemotaxis, apoptosis, differentiation, and
progenitor cell function. They mediate the signaling of
integrins at focal adhesions where they localize, and
thus, regulate cell invasion and survival.
Over-expression of these proteins is implicated in poor
prognosis, increased metastasis, and resistance to
chemotherapeutics in many cancers such as breast, lung,
melanoma, and glioblastoma. CAS proteins have also been
linked to the pathogenesis of inflammatory disorders,
Alzheimer's, Parkinson's, and developmental defects.
They share a common domain structure that includes an
N-terminal SH3 domain, an unstructured substrate domain
that contains many YxxP motifs, a serine-rich four-helix
bundle, and a FAT-like C-terminal domain. Vertebrates
contain four CAS proteins: BCAR1 (or p130Cas), NEDD9 (or
HEF1), EFS (or SIN), and CASS4 (or HEPL). The SH3 domain
of CAS proteins binds to diverse partners including FAK,
FRNK, Pyk2, PTP-PEST, DOCK180, among others. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 56
Score = 49.7 bits (119), Expect = 3e-08
Identities = 20/51 (39%), Positives = 31/51 (60%), Gaps = 3/51 (5%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSD---QHWWHGEIGARKGLFPA 203
L +ALYD + P EL FRRGD++TV +++ + WW + R+G+ P
Sbjct: 1 LARALYDNVAESPDELAFRRGDILTVLEQNTAGLEGWWLCSLRGRQGIAPG 51
Score = 42.7 bits (101), Expect = 8e-06
Identities = 18/55 (32%), Positives = 31/55 (56%), Gaps = 2/55 (3%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKIL--NMEDDMNWYRAELDGKEGLIPSNYIEM 55
A A +D A + DEL+FR+ +L +L N W+ L G++G+ P N +++
Sbjct: 2 ARALYDNVAESPDELAFRRGDILTVLEQNTAGLEGWWLCSLRGRQGIAPGNRLKL 56
Score = 28.9 bits (65), Expect = 0.66
Identities = 11/20 (55%), Positives = 13/20 (65%)
Query: 335 LVQALYDFTPQEPGELEFRR 354
L +ALYD + P EL FRR
Sbjct: 1 LARALYDNVAESPDELAFRR 20
>gnl|CDD|212817 cd11884, SH3_MYO15, Src Homology 3 domain of Myosin XV. This
subfamily is composed of proteins with similarity to
Myosin XVa. Myosin XVa is an unconventional myosin that
is critical for the normal growth of mechanosensory
stereocilia of inner ear hair cells. Mutations in the
myosin XVa gene are associated with nonsyndromic hearing
loss. Myosin XVa contains a unique N-terminal extension
followed by a motor domain, light chain-binding IQ
motifs, and a tail consisting of a pair of MyTH4-FERM
tandems separated by a SH3 domain, and a PDZ domain. SH3
domains bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs;
they play a role in the regulation of enzymes by
intramolecular interactions, changing the subcellular
localization of signal pathway components and mediate
multiprotein complex assemblies.
Length = 56
Score = 49.2 bits (118), Expect = 3e-08
Identities = 16/53 (30%), Positives = 25/53 (47%), Gaps = 3/53 (5%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRS---DQHWWHGEIGARKGLFPATYI 206
V A+ + ++ L F +GDVI + + D W G + R G FP Y+
Sbjct: 2 VVAVRAYITRDQTLLSFHKGDVIKLLPKEGPLDPGWLFGTLDGRSGAFPKEYV 54
Score = 34.2 bits (79), Expect = 0.006
Identities = 16/40 (40%), Positives = 21/40 (52%), Gaps = 2/40 (5%)
Query: 17 LSFRKSQVLKILNME--DDMNWYRAELDGKEGLIPSNYIE 54
LSF K V+K+L E D W LDG+ G P Y++
Sbjct: 16 LSFHKGDVIKLLPKEGPLDPGWLFGTLDGRSGAFPKEYVQ 55
>gnl|CDD|212763 cd11829, SH3_GAS7, Src homology 3 domain of Growth Arrest Specific
protein 7. GAS7 is mainly expressed in the brain and is
required for neurite outgrowth. It may also play a role
in the protection and migration of embryonic stem cells.
Treatment-related acute myeloid leukemia (AML) has been
reported resulting from mixed-lineage leukemia
(MLL)-GAS7 translocations as a complication of primary
cancer treatment. GAS7 contains an N-terminal SH3
domain, followed by a WW domain, and a central F-BAR
domain. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 49.4 bits (118), Expect = 3e-08
Identities = 20/52 (38%), Positives = 29/52 (55%), Gaps = 1/52 (1%)
Query: 156 LVQALYDFTPQEPGE-LEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
L + LY FT ++ + L F G++I V D WW GE +G FPA+Y+
Sbjct: 1 LCRTLYAFTGEQHQQGLSFEAGELIRVLQAPDGGWWEGEKDGLRGWFPASYV 52
Score = 27.9 bits (62), Expect = 1.3
Identities = 12/37 (32%), Positives = 21/37 (56%), Gaps = 1/37 (2%)
Query: 17 LSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
LSF +++++L D W+ E DG G P++Y+
Sbjct: 17 LSFEAGELIRVLQAPDG-GWWEGEKDGLRGWFPASYV 52
>gnl|CDD|212721 cd11787, SH3_SH3RF_2, Second Src Homology 3 domain of SH3 domain
containing ring finger proteins. This model represents
the second SH3 domain of SH3RF1 (or POSH), SH3RF2 (or
POSHER), SH3RF3 (POSH2), and similar domains. Members of
this family are scaffold proteins that function as E3
ubiquitin-protein ligases. They all contain an
N-terminal RING finger domain and multiple SH3 domains;
SH3RF1 and SH3RF3 have four SH3 domains while SH3RF2 has
three. SH3RF1 plays a role in calcium homeostasis
through the control of the ubiquitin domain protein
Herp. It may also have a role in regulating death
receptor mediated and JNK mediated apoptosis. SH3RF3
interacts with p21-activated kinase 2 (PAK2) and
GTP-loaded Rac1. It may play a role in regulating JNK
mediated apoptosis in certain conditions. SH3RF2 acts as
an anti-apoptotic regulator of the JNK pathway by
binding to and promoting the degradation of SH3RF1. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 49.3 bits (118), Expect = 3e-08
Identities = 22/50 (44%), Positives = 33/50 (66%), Gaps = 3/50 (6%)
Query: 159 ALYDFTPQEPGE---LEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATY 205
ALYDF ++ E L F++GDVITV R D++W G +G + G+FP ++
Sbjct: 4 ALYDFEMKDEDEKDCLTFKKGDVITVIRRVDENWAEGRLGDKIGIFPISF 53
>gnl|CDD|199829 cd10341, SH2_N-SH2_PLC_gamma_like, N-terminal Src homology 2
(N-SH2) domain in Phospholipase C gamma. Phospholipase
C gamma is a signaling molecule that is recruited to the
C-terminal tail of the receptor upon autophosphorylation
of a highly conserved tyrosine. PLCgamma is composed of
a Pleckstrin homology (PH) domain followed by an
elongation factor (EF) domain, 2 catalytic regions of
PLC domains that flank 2 tandem SH2 domains (N-SH2,
C-SH2), and ending with a SH3 domain and C2 domain.
N-SH2 SH2 domain-mediated interactions represent a
crucial step in transmembrane signaling by receptor
tyrosine kinases. SH2 domains recognize phosphotyrosine
(pY) in the context of particular sequence motifs in
receptor phosphorylation sites. Both N-SH2 and C-SH2
have a very similar binding affinity to pY. But in
growth factor stimulated cells these domains bind to
different target proteins. N-SH2 binds to pY containing
sites in the C-terminal tails of tyrosine kinases and
other receptors. Recently it has been shown that this
interaction is mediated by phosphorylation-independent
interactions between a secondary binding site found
exclusively on the N-SH2 domain and a region of the
FGFR1 tyrosine kinase domain. This secondary site on the
SH2 cooperates with the canonical pY site to regulate
selectivity in mediating a specific cellular process.
C-SH2 binds to an intramolecular site on PLCgamma itself
which allows it to hydrolyze
phosphatidylinositol-4,5-bisphosphate into
diacylglycerol and inositol triphosphate. These then
activate protein kinase C and release calcium. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 99
Score = 50.4 bits (121), Expect = 3e-08
Identities = 31/85 (36%), Positives = 52/85 (61%), Gaps = 9/85 (10%)
Query: 60 WYYGRIT--RADAERLLS---NKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKV-LRDS 113
W++G++ R +AE+LL +G FL+R SE+ GD++LS + VQH ++ R
Sbjct: 6 WFHGKLGDGRDEAEKLLLEYCEGGDGTFLVRESETFVGDYTLSFWRNGKVQHCRIRSRQE 65
Query: 114 SG--KFFLWVVK-FNSLNELVEYHR 135
+G K++L F+SL EL++Y+R
Sbjct: 66 NGEKKYYLTDNLVFDSLYELIDYYR 90
Score = 50.4 bits (121), Expect = 3e-08
Identities = 31/85 (36%), Positives = 52/85 (61%), Gaps = 9/85 (10%)
Query: 239 WYYGRIT--RADAERLLS---NKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKV-LRDS 292
W++G++ R +AE+LL +G FL+R SE+ GD++LS + VQH ++ R
Sbjct: 6 WFHGKLGDGRDEAEKLLLEYCEGGDGTFLVRESETFVGDYTLSFWRNGKVQHCRIRSRQE 65
Query: 293 SG--KFFLWVVK-FNSLNELVEYHR 314
+G K++L F+SL EL++Y+R
Sbjct: 66 NGEKKYYLTDNLVFDSLYELIDYYR 90
>gnl|CDD|212700 cd11766, SH3_Nck_2, Second Src Homology 3 domain of Nck adaptor
proteins. Nck adaptor proteins regulate actin
cytoskeleton dynamics by linking proline-rich effector
molecules to protein tyrosine kinases and
phosphorylated signaling intermediates. They contain
three SH3 domains and a C-terminal SH2 domain. They
function downstream of the PDGFbeta receptor and are
involved in Rho GTPase signaling and actin dynamics.
Vertebrates contain two Nck adaptor proteins: Nck1
(also called Nckalpha) and Nck2 (also called Nckbeta or
Growth factor receptor-bound protein 4, Grb4), which
show partly overlapping functions but also bind
distinct targets. Their SH3 domains are involved in
recruiting downstream effector molecules, such as the
N-WASP/Arp2/3 complex, which when activated induces
actin polymerization that results in the production of
pedestals, or protrusions of the plasma membrane. The
second SH3 domain of Nck appears to prefer ligands
containing the APxxPxR motif. SH3 domains are protein
interaction domains that usually bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially a PxxP motif. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 53
Score = 48.8 bits (117), Expect = 4e-08
Identities = 21/53 (39%), Positives = 30/53 (56%), Gaps = 1/53 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A+ K ++ A EDELS RK + +L D W+R E +G+ G PSNY+
Sbjct: 1 PAVVKFNYEAQREDELSLRKGDRVLVLEKSSD-GWWRGECNGQVGWFPSNYVT 52
Score = 47.3 bits (113), Expect = 1e-07
Identities = 16/50 (32%), Positives = 26/50 (52%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+++ Q EL R+GD + V ++S WW GE + G FP+ Y+
Sbjct: 2 AVVKFNYEAQREDELSLRKGDRVLVLEKSSDGWWRGECNGQVGWFPSNYV 51
>gnl|CDD|212840 cd11907, SH3_TXK, Src Homology 3 domain of TXK, also called Resting
lymphocyte kinase (Rlk). TXK is a cytoplasmic (or
nonreceptor) tyr kinase containing Src homology protein
interaction domains (SH3, SH2) N-terminal to the
catalytic tyr kinase domain. It also contains an
N-terminal cysteine-rich region. Rlk is expressed in
T-cells and mast cell lines, and is a key component of
T-cell receptor (TCR) signaling. It is important in
TCR-stimulated proliferation, IL-2 production and
phospholipase C-gamma1 activation. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 48.8 bits (116), Expect = 5e-08
Identities = 26/76 (34%), Positives = 34/76 (44%), Gaps = 25/76 (32%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWY 216
V+ALYDF P+EP L +R + + ++ D HWW AR
Sbjct: 3 VKALYDFLPREPSNLALKRAEEYLILEQYDPHWWK----ARDRY---------------- 42
Query: 217 RAELDGKEGLIPSNYI 232
G EGLIPSNY+
Sbjct: 43 -----GNEGLIPSNYV 53
Score = 35.3 bits (81), Expect = 0.003
Identities = 17/53 (32%), Positives = 27/53 (50%)
Query: 1 MEAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
++ A +DF L+ ++++ IL D W + G EGLIPSNY+
Sbjct: 1 IQVKALYDFLPREPSNLALKRAEEYLILEQYDPHWWKARDRYGNEGLIPSNYV 53
Score = 29.9 bits (67), Expect = 0.27
Identities = 11/19 (57%), Positives = 14/19 (73%)
Query: 336 VQALYDFTPQEPGELEFRR 354
V+ALYDF P+EP L +R
Sbjct: 3 VKALYDFLPREPSNLALKR 21
>gnl|CDD|212770 cd11836, SH3_Intersectin_1, First Src homology 3 domain (or SH3A)
of Intersectin. Intersectins (ITSNs) are adaptor
proteins that function in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction.
They are essential for initiating clathrin-coated pit
formation. They bind to many proteins through their
multidomain structure and facilitate the assembly of
multimeric complexes. Vertebrates contain two ITSN
proteins, ITSN1 and ITSN2, which exist in alternatively
spliced short and long isoforms. The short isoforms
contain two Eps15 homology domains (EH1 and EH2), a
coiled-coil region and five SH3 domains (SH3A-E), while
the long isoforms, in addition, contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin homology (PH)
and C2 domains. ITSN1 and ITSN2 are both widely
expressed, with variations depending on tissue type and
stage of development. The first SH3 domain (or SH3A) of
ITSN1 has been shown to bind many proteins including
Sos1, dynamin1/2, CIN85, c-Cbl, PI3K-C2, SHIP2, N-WASP,
and CdGAP, among others. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 48.9 bits (117), Expect = 5e-08
Identities = 19/51 (37%), Positives = 28/51 (54%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQH--WWHGEIGARKGLFPATYI 206
+ALY F + P E+ F+ GD+I V + W GE+ + G FPA Y+
Sbjct: 3 RALYAFEARNPDEISFQPGDIIQVDESQVAEPGWLAGELKGKTGWFPANYV 53
Score = 36.6 bits (85), Expect = 0.001
Identities = 17/51 (33%), Positives = 28/51 (54%), Gaps = 1/51 (1%)
Query: 5 AKHDFNATAEDELSFRKSQVLKI-LNMEDDMNWYRAELDGKEGLIPSNYIE 54
A + F A DE+SF+ ++++ + + W EL GK G P+NY+E
Sbjct: 4 ALYAFEARNPDEISFQPGDIIQVDESQVAEPGWLAGELKGKTGWFPANYVE 54
>gnl|CDD|212909 cd11976, SH3_VAV1_2, C-terminal (or second) Src homology 3 domain
of VAV1 protein. VAV1 is expressed predominantly in
the hematopoietic system and it plays an important role
in the development and activation of B and T cells. It
is activated by tyrosine phosphorylation to function as
a guanine nucleotide exchange factor (GEF) for Rho
GTPases following cell surface receptor activation,
triggering various effects such as cytoskeletal
reorganization, transcription regulation, cell cycle
progression, and calcium mobilization. It also serves
as a scaffold protein and has been shown to interact
with Ku70, Socs1, Janus kinase 2, SIAH2, S100B, Abl
gene, ZAP-70, SLP76, and Syk, among others. VAV
proteins contain several domains that enable their
function: N-terminal calponin homology (CH), acidic,
RhoGEF (also called Dbl-homologous or DH), Pleckstrin
Homology (PH), C1 (zinc finger), SH2, and two SH3
domains. The C-terminal SH3 domain of Vav1 interacts
with a wide variety of proteins including cytoskeletal
regulators (zyxin), RNA-binding proteins (Sam68),
transcriptional regulators, viral proteins, and dynamin
2. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 48.8 bits (116), Expect = 6e-08
Identities = 21/52 (40%), Positives = 33/52 (63%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A A++DF A ELS ++ ++KILN + W+R E+ G+ G P+NY+E
Sbjct: 2 AKARYDFCARDRSELSLKEGDIIKILNKKGQQGWWRGEIYGRVGWFPANYVE 53
Score = 47.2 bits (112), Expect = 2e-07
Identities = 21/50 (42%), Positives = 30/50 (60%), Gaps = 1/50 (2%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQH-WWHGEIGARKGLFPATYI 206
+A YDF ++ EL + GD+I + ++ Q WW GEI R G FPA Y+
Sbjct: 3 KARYDFCARDRSELSLKEGDIIKILNKKGQQGWWRGEIYGRVGWFPANYV 52
>gnl|CDD|212752 cd11818, SH3_Eve1_5, Fifth Src homology 3 domain of ADAM-binding
protein Eve-1. Eve-1, also called SH3 domain-containing
protein 19 (SH3D19) or EEN-binding protein (EBP), exists
in multiple alternatively spliced isoforms. The longest
isoform contains five SH3 domain in the C-terminal
region and seven proline-rich motifs in the N-terminal
region. It is abundantly expressed in skeletal muscle
and heart, and may be involved in regulating the
activity of ADAMs (A disintegrin and metalloproteases).
Eve-1 interacts with EEN, an endophilin involved in
endocytosis and may be the target of the MLL-EEN fusion
protein that is implicated in leukemogenesis. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 50
Score = 48.2 bits (115), Expect = 6e-08
Identities = 20/48 (41%), Positives = 30/48 (62%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATY 205
+ALYDFT + EL F+ GD+IT + D+ W GE+ + G+FP +
Sbjct: 3 RALYDFTGENEDELSFKAGDIITELESIDEEWMSGELRGKSGIFPKNF 50
Score = 40.2 bits (94), Expect = 5e-05
Identities = 21/52 (40%), Positives = 28/52 (53%), Gaps = 3/52 (5%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMED-DMNWYRAELDGKEGLIPSNY 52
+A A +DF EDELSF+ + I +E D W EL GK G+ P N+
Sbjct: 1 KARALYDFTGENEDELSFKAGDI--ITELESIDEEWMSGELRGKSGIFPKNF 50
>gnl|CDD|212987 cd12054, SH3_CD2AP_2, Second Src Homology 3 domain (SH3B) of
CD2-associated protein. CD2AP, also called CMS (Cas
ligand with Multiple SH3 domains) or METS1
(Mesenchyme-to-Epithelium Transition protein with SH3
domains), is a cytosolic adaptor protein that plays a
role in regulating the cytoskeleton. It is critical in
cell-to-cell union necessary for kidney function. It
also stabilizes the contact between a T cell and
antigen-presenting cells. It is primarily expressed in
podocytes at the cytoplasmic face of the slit diaphragm
and serves as a linker anchoring podocin and nephrin to
the actin cytoskeleton. CD2AP contains three SH3
domains, a proline-rich region, and a C-terminal
coiled-coil domain. All of these domains enable CD2AP to
bind various protein partners and assemble complexes
that have been implicated in many different functions.
This alignment model represents the second SH3 domain
(SH3B) of CD2AP. SH3B binds to c-Cbl in a site (TPSSRPLR
is the core binding motif) distinct from the c-Cbl/SH3A
binding site. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 48.4 bits (115), Expect = 6e-08
Identities = 16/49 (32%), Positives = 31/49 (63%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ L+++ PQ ELE + GD+I + + ++ WW G + + GLFP+ ++
Sbjct: 4 KVLFEYVPQNEDELELKVGDIIDINEEVEEGWWSGTLNGKSGLFPSNFV 52
Score = 34.9 bits (80), Expect = 0.004
Identities = 16/41 (39%), Positives = 25/41 (60%), Gaps = 1/41 (2%)
Query: 14 EDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
EDEL + ++ I N E + W+ L+GK GL PSN+++
Sbjct: 14 EDELELKVGDIIDI-NEEVEEGWWSGTLNGKSGLFPSNFVK 53
>gnl|CDD|212730 cd11796, SH3_DNMBP_N3, Third N-terminal Src homology 3 domain of
Dynamin Binding Protein, also called Tuba. DNMBP or
Tuba is a cdc42-specific guanine nucleotide exchange
factor (GEF) that contains four N-terminal SH3 domains,
a central RhoGEF [or Dbl homology (DH)] domain followed
by a Bin/Amphiphysin/Rvs (BAR) domain, and two
C-terminal SH3 domains. It provides a functional link
between dynamin and key regulatory proteins of the actin
cytoskeleton. It plays an important role in regulating
cell junction configuration. The four N-terminal SH3
domains of DNMBP binds the GTPase dynamin, which plays
an important role in the fission of endocytic vesicles.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 51
Score = 48.1 bits (115), Expect = 6e-08
Identities = 19/48 (39%), Positives = 30/48 (62%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
L D + Q EL+ R GDV+T+T D+ W+ GE+ R+G+FP ++
Sbjct: 4 VLQDLSAQLDEELDLREGDVVTITGILDKGWFRGELNGRRGIFPEGFV 51
Score = 40.0 bits (94), Expect = 6e-05
Identities = 16/51 (31%), Positives = 28/51 (54%), Gaps = 1/51 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
A D +A ++EL R+ V+ I + D W+R EL+G+ G+ P ++
Sbjct: 2 ARVLQDLSAQLDEELDLREGDVVTITGILDK-GWFRGELNGRRGIFPEGFV 51
>gnl|CDD|212936 cd12003, SH3_EFS, Src homology 3 domain of CAS (Crk-Associated
Substrate) scaffolding protein family member, Embryonal
Fyn-associated Substrate. EFS is also called HEFS,
CASS3 (Cas scaffolding protein family member 3) or SIN
(Src-interacting protein). It was identified based on
interactions with the Src kinases, Fyn and Yes. It plays
a role in thymocyte development and acts as a negative
regulator of T cell proliferation. CAS proteins function
as molecular scaffolds to regulate protein complexes
that are involved in many cellular processes. They share
a common domain structure that includes an N-terminal
SH3 domain, an unstructured substrate domain that
contains many YxxP motifs, a serine-rich four-helix
bundle, and a FAT-like C-terminal domain. The SH3 domain
of CAS proteins binds to diverse partners including FAK,
FRNK, Pyk2, PTP-PEST, DOCK180, among others. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 62
Score = 48.7 bits (116), Expect = 7e-08
Identities = 21/51 (41%), Positives = 28/51 (54%), Gaps = 3/51 (5%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQH---WWHGEIGARKGLFPA 203
L +ALYD + P EL FRRGDV+ V R WW + ++G+ PA
Sbjct: 2 LAKALYDNAAESPEELSFRRGDVLMVLKREHGSLPGWWLCSLHGQQGIAPA 52
Score = 41.4 bits (97), Expect = 3e-05
Identities = 19/55 (34%), Positives = 31/55 (56%), Gaps = 2/55 (3%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDM--NWYRAELDGKEGLIPSNYIEM 55
A A +D A + +ELSFR+ VL +L E W+ L G++G+ P+N + +
Sbjct: 3 AKALYDNAAESPEELSFRRGDVLMVLKREHGSLPGWWLCSLHGQQGIAPANRLRL 57
Score = 29.1 bits (65), Expect = 0.54
Identities = 11/20 (55%), Positives = 13/20 (65%)
Query: 335 LVQALYDFTPQEPGELEFRR 354
L +ALYD + P EL FRR
Sbjct: 2 LAKALYDNAAESPEELSFRR 21
>gnl|CDD|212815 cd11882, SH3_GRAF-like, Src Homology 3 domain of GTPase Regulator
Associated with Focal adhesion kinase and similar
proteins. This subfamily is composed of Rho GTPase
activating proteins (GAPs) with similarity to GRAF.
Members contain an N-terminal BAR domain, followed by a
Pleckstrin homology (PH) domain, a Rho GAP domain, and a
C-terminal SH3 domain. Although vertebrates harbor four
Rho GAPs in the GRAF subfamily including GRAF, GRAF2,
GRAF3, and Oligophrenin-1 (OPHN1), only three are
included in this model. OPHN1 contains the BAR, PH and
GAP domains, but not the C-terminal SH3 domain. GRAF and
GRAF2 show GAP activity towards RhoA and Cdc42. GRAF
influences Rho-mediated cytoskeletal rearrangements and
binds focal adhesion kinase. GRAF2 regulates
caspase-activated p21-activated protein kinase-2. The
SH3 domain of GRAF and GRAF2 binds PKNbeta, a target of
the small GTPase Rho. SH3 domains bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs; they play a role in the
regulation of enzymes by intramolecular interactions,
changing the subcellular localization of signal pathway
components and mediate multiprotein complex assemblies.
Length = 54
Score = 48.4 bits (116), Expect = 7e-08
Identities = 22/77 (28%), Positives = 29/77 (37%), Gaps = 25/77 (32%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWY 216
+ALY ++ EL F G +IT SD E W
Sbjct: 2 ARALYACKAEDESELSFEPGQIITNVQPSD-----------------------EPG--WL 36
Query: 217 RAELDGKEGLIPSNYIE 233
L+G+ GLIP NY+E
Sbjct: 37 EGTLNGRTGLIPENYVE 53
Score = 47.3 bits (113), Expect = 2e-07
Identities = 20/52 (38%), Positives = 29/52 (55%), Gaps = 2/52 (3%)
Query: 5 AKHDFNATAED--ELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A+ + AED ELSF Q++ + D+ W L+G+ GLIP NY+E
Sbjct: 2 ARALYACKAEDESELSFEPGQIITNVQPSDEPGWLEGTLNGRTGLIPENYVE 53
Score = 26.1 bits (58), Expect = 4.7
Identities = 6/20 (30%), Positives = 9/20 (45%)
Query: 336 VQALYDFTPQEPGELEFRRD 355
+ALY ++ EL F
Sbjct: 2 ARALYACKAEDESELSFEPG 21
>gnl|CDD|212945 cd12012, SH3_RIM-BP_2, Second Src homology 3 domain of
Rab3-interacting molecules (RIMs) binding proteins.
RIMs binding proteins (RBPs, RIM-BPs) associate with
calcium channels present in photoreceptors, neurons,
and hair cells; they interact simultaneously with
specific calcium channel subunits, and active zone
proteins, RIM1 and RIM2. RIMs are part of the matrix at
the presynaptic active zone and are associated with
synaptic vesicles through their interaction with the
small GTPase Rab3. RIM-BPs play a role in regulating
synaptic transmission by serving as adaptors and
linking calcium channels with the synaptic vesicle
release machinery. RIM-BPs contain three SH3 domains
and two to three fibronectin III repeats. Invertebrates
contain one, while vertebrates contain at least two
RIM-BPs, RIM-BP1 and RIM-BP2. RIM-BP1 is also called
peripheral-type benzodiazapine receptor associated
protein 1 (PRAX-1). Mammals contain a third protein,
RIM-BP3. RIM-BP1 and RIM-BP2 are predominantly
expressed in the brain where they display overlapping
but distinct expression patterns, while RIM-BP3 is
almost exclusively expressed in the testis and is
essential in spermiogenesis. The SH3 domains of RIM-BPs
bind to the PxxP motifs of RIM1, RIM2, and L-type
(alpha1D) and N-type (alpha1B) calcium channel
subunits. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate
affinity and selectivity. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 62
Score = 48.4 bits (116), Expect = 8e-08
Identities = 15/42 (35%), Positives = 28/42 (66%)
Query: 13 AEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
AE+EL F++ Q++K+ +D +Y E++G+ GL+P N +
Sbjct: 20 AEEELPFKEGQLIKVYGDKDADGFYLGEINGRRGLVPCNMVS 61
Score = 38.0 bits (89), Expect = 3e-04
Identities = 21/60 (35%), Positives = 29/60 (48%), Gaps = 13/60 (21%)
Query: 159 ALYDFTP--QEPG------ELEFRRGDVITV-TDRSDQHWWHGEIGARKGLFPATYILNM 209
AL+D+ P P EL F+ G +I V D+ ++ GEI R+GL P NM
Sbjct: 4 ALFDYDPLTMSPNPDAAEEELPFKEGQLIKVYGDKDADGFYLGEINGRRGLVPC----NM 59
>gnl|CDD|198260 cd10397, SH2_Tec_Btk, Src homology 2 (SH2) domain found in Tec
protein, Bruton's tyrosine kinase (Btk). A member of
the Tec protein tyrosine kinase Btk is expressed in bone
marrow, spleen, all hematopoietic cells except T
lymphocytes and plasma cells where it plays a crucial
role in B cell maturation and mast cell activation. Btk
has been shown to interact with GNAQ, PLCG2, protein
kinase D1, B-cell linker, SH3BP5, caveolin 1, ARID3A,
and GTF2I. Most of the Tec family members have a PH
domain (Txk and the short (type 1) splice variant of
Drosophila Btk29A are exceptions), a Tec homology (TH)
domain, a SH3 domain, a SH2 domain, and a protein kinase
catalytic domain. Btk is implicated in the primary
immunodeficiency disease X-linked agammaglobulinemia
(Bruton's agammaglobulinemia). The TH domain consists
of a Zn2+-binding Btk motif and a proline-rich region.
The Btk motif is found in Tec kinases, Ras GAP, and
IGBP. It is crucial for the function of Tec PH domains
and it's lack of presence in Txk is not surprising since
it lacks a PH domain. The type 1 splice form of the
Drosophila homolog also lacks both the PH domain and the
Btk motif. The proline-rich regions are highly
conserved for the most part with the exception of Bmx
whose residues surrounding the PXXP motif are not
conserved (TH-like) and Btk29A which is entirely unique
with large numbers of glycine residues (TH-extended).
Tec family members all lack a C-terminal tyrosine having
an autoinhibitory function in its phosphorylated state.
Two tyrosine phosphorylation (pY) sites have been
identified in Btk: one located in the activation loop of
the catalytic domain which regulates the transition
between open (active) and closed (inactive) states and
the other in its SH3 domain. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 106
Score = 49.8 bits (119), Expect = 8e-08
Identities = 27/99 (27%), Positives = 53/99 (53%), Gaps = 12/99 (12%)
Query: 54 EMKNHDWYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSDG------VQH 106
++ ++WY +TR+ AE+LL + EG F++R S S G +++SV ++H
Sbjct: 2 SLEMYEWYSKNMTRSQAEQLLKQEGKEGGFIVRDS-SKAGKYTVSVFAKSAGDPQGVIRH 60
Query: 107 FKVLRDSSGKFFLWVVK-FNSLNELVEYHRTAS---VSR 141
+ V +++L F+++ EL+ YH+ + +SR
Sbjct: 61 YVVCSTPQSQYYLAEKHLFSTIPELINYHQHNAAGLISR 99
Score = 49.8 bits (119), Expect = 8e-08
Identities = 27/99 (27%), Positives = 53/99 (53%), Gaps = 12/99 (12%)
Query: 233 EMKNHDWYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSDG------VQH 285
++ ++WY +TR+ AE+LL + EG F++R S S G +++SV ++H
Sbjct: 2 SLEMYEWYSKNMTRSQAEQLLKQEGKEGGFIVRDS-SKAGKYTVSVFAKSAGDPQGVIRH 60
Query: 286 FKVLRDSSGKFFLWVVK-FNSLNELVEYHRTAS---VSR 320
+ V +++L F+++ EL+ YH+ + +SR
Sbjct: 61 YVVCSTPQSQYYLAEKHLFSTIPELINYHQHNAAGLISR 99
>gnl|CDD|212742 cd11808, SH3_Alpha_Spectrin, Src homology 3 domain of Alpha
Spectrin. Spectrin is a major structural component of
the red blood cell membrane skeleton and is important in
erythropoiesis and membrane biogenesis. It is a
flexible, rope-like molecule composed of two subunits,
alpha and beta, which consist of many spectrin-type
repeats. Alpha and beta spectrin associate to form
heterodimers and tetramers; spectrin tetramer formation
is critical for red cell shape and deformability.
Defects in alpha spectrin have been associated with
inherited hemolytic anemias including hereditary
spherocytosis (HSp), hereditary elliptocytosis (HE), and
hereditary pyropoikilocytosis (HPP). Alpha spectrin
contains a middle SH3 domain and a C-terminal EF-hand
binding motif in addition to multiple spectrin repeats.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 47.9 bits (114), Expect = 1e-07
Identities = 19/51 (37%), Positives = 33/51 (64%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V ALYD+ + P E+ ++GD++T+ + S++ WW E+ R+G PA Y+
Sbjct: 1 CVVALYDYQEKSPREVSMKKGDILTLLNSSNKDWWKVEVNDRQGFVPAAYV 51
Score = 37.1 bits (86), Expect = 6e-04
Identities = 13/51 (25%), Positives = 33/51 (64%), Gaps = 1/51 (1%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
+A +D+ + E+S +K +L +LN + +W++ E++ ++G +P+ Y++
Sbjct: 3 VALYDYQEKSPREVSMKKGDILTLLN-SSNKDWWKVEVNDRQGFVPAAYVK 52
>gnl|CDD|212899 cd11966, SH3_ASAP2, Src homology 3 domain of ArfGAP with SH3
domain, ankyrin repeat and PH domain containing protein
2. ASAP2 is also called DDEF2 (Development and
Differentiation Enhancing Factor 2), AMAP2, centaurin
beta-3, or PAG3. It mediates the functions of Arf
GTPases vial dual mechanisms: it exhibits GTPase
activating protein (GAP) activity towards class I (Arf1)
and II (Arf5) Arfs; and it binds class III Arfs
(GTP-Arf6) stably without GAP activity. It binds
paxillin and is implicated in Fcgamma receptor-mediated
phagocytosis in macrophages and in cell migration. ASAP2
contains an N-terminal BAR domain, followed by a
Pleckstrin homology (PH) domain, an Arf GAP domain,
ankyrin (ANK) repeats, and a C-terminal SH3 domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 56
Score = 47.6 bits (113), Expect = 1e-07
Identities = 20/53 (37%), Positives = 29/53 (54%), Gaps = 3/53 (5%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGA---RKGLFPATYI 206
V+ALY+ P EL F G++I V D+ WW G I R+G FP +++
Sbjct: 2 VKALYNCVADNPDELTFSEGEIIIVDGEEDKEWWIGHIDGEPTRRGAFPVSFV 54
>gnl|CDD|198234 cd10371, SH2_Src_Blk, Src homology 2 (SH2) domain found in B
lymphoid kinase (Blk). Blk is a member of the Src
non-receptor type tyrosine kinase family of proteins.
Blk is expressed in the B-cells. Unlike most other Src
members Blk lacks cysteine residues in the SH4 domain
that undergo palmitylation. Blk is required for the
development of IL-17-producing gamma-delta T cells.
Furthermore, Blk is expressed in lymphoid precursors
and, in this capacity, plays a role in regulating thymus
cellularity during ontogeny. Blk has a unique N-terminal
domain, an SH3 domain, an SH2 domain, a kinase domain
and a regulatory tail, as do the other members of the
family. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 100
Score = 49.2 bits (117), Expect = 1e-07
Identities = 35/83 (42%), Positives = 51/83 (61%), Gaps = 9/83 (10%)
Query: 60 WYYGRITRADAERLL---SNKHEGAFLIRVSESSPGDFSLSVK--CSDG--VQHFKVLR- 111
W++ I+R DAER L NK G+FLIR SES+ G FSLSVK + G V+H+K+
Sbjct: 5 WFFRTISRKDAERQLLAPMNK-AGSFLIRESESNKGAFSLSVKDVTTQGEVVKHYKIRSL 63
Query: 112 DSSGKFFLWVVKFNSLNELVEYH 134
D+ G + + F +L LV+++
Sbjct: 64 DNGGYYISPRITFPTLQALVQHY 86
Score = 49.2 bits (117), Expect = 1e-07
Identities = 35/83 (42%), Positives = 51/83 (61%), Gaps = 9/83 (10%)
Query: 239 WYYGRITRADAERLL---SNKHEGAFLIRVSESSPGDFSLSVK--CSDG--VQHFKVLR- 290
W++ I+R DAER L NK G+FLIR SES+ G FSLSVK + G V+H+K+
Sbjct: 5 WFFRTISRKDAERQLLAPMNK-AGSFLIRESESNKGAFSLSVKDVTTQGEVVKHYKIRSL 63
Query: 291 DSSGKFFLWVVKFNSLNELVEYH 313
D+ G + + F +L LV+++
Sbjct: 64 DNGGYYISPRITFPTLQALVQHY 86
>gnl|CDD|198262 cd10399, SH2_Tec_Bmx, Src homology 2 (SH2) domain found in Tec
protein, Bmx. A member of the Tec protein tyrosine
kinase Bmx is expressed in the endothelium of large
arteries, fetal endocardium, adult endocardium of the
left ventricle, bone marrow, lung, testis, granulocytes,
myeloid cell lines, and prostate cell lines. Bmx is
involved in the regulation of Rho and serum response
factor (SRF). Bmx has been shown to interact with PAK1,
PTK2, PTPN21, and RUFY1. Most of the Tec family members
have a PH domain (Txk and the short (type 1) splice
variant of Drosophila Btk29A are exceptions), a Tec
homology (TH) domain, a SH3 domain, a SH2 domain, and a
protein kinase catalytic domain. The TH domain consists
of a Zn2+-binding Btk motif and a proline-rich region.
The Btk motif is found in Tec kinases, Ras GAP, and
IGBP. It is crucial for the function of Tec PH domains.
It is not present in Txk and the type 1 splice form of
the Drosophila homolog. The proline-rich regions are
highly conserved for the most part with the exception of
Bmx whose residues surrounding the PXXP motif are not
conserved (TH-like) and Btk29A which is entirely unique
with large numbers of glycine residues (TH-extended).
Tec family members all lack a C-terminal tyrosine having
an autoinhibitory function in its phosphorylated state.
In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 106
Score = 49.2 bits (117), Expect = 1e-07
Identities = 29/88 (32%), Positives = 50/88 (56%), Gaps = 9/88 (10%)
Query: 59 DWYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSDG------VQHFKVLR 111
DW+ G I+R+ +E+LL K EGAF++R S S G +++S+ V+H+ V
Sbjct: 7 DWFAGNISRSQSEQLLRQKGKEGAFMVRNS-SQVGMYTVSLFSKAVNDKKGTVKHYHVHT 65
Query: 112 DSSGKFFLWVVK-FNSLNELVEYHRTAS 138
++ K +L F+S+ +L+ YH+ S
Sbjct: 66 NAENKLYLAENYCFDSIPKLIHYHQHNS 93
Score = 49.2 bits (117), Expect = 1e-07
Identities = 29/88 (32%), Positives = 50/88 (56%), Gaps = 9/88 (10%)
Query: 238 DWYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSDG------VQHFKVLR 290
DW+ G I+R+ +E+LL K EGAF++R S S G +++S+ V+H+ V
Sbjct: 7 DWFAGNISRSQSEQLLRQKGKEGAFMVRNS-SQVGMYTVSLFSKAVNDKKGTVKHYHVHT 65
Query: 291 DSSGKFFLWVVK-FNSLNELVEYHRTAS 317
++ K +L F+S+ +L+ YH+ S
Sbjct: 66 NAENKLYLAENYCFDSIPKLIHYHQHNS 93
>gnl|CDD|212903 cd11970, SH3_PLCgamma1, Src homology 3 domain of Phospholipase C
(PLC) gamma 1. PLCgamma1 is widely expressed and is
essential in growth and development. It is activated by
the TrkA receptor tyrosine kinase and functions as a key
regulator of cell differentiation. It is also the
predominant PLCgamma in T cells and is required for T
cell and NK cell function. PLCs catalyze the hydrolysis
of phosphatidylinositol (4,5)-bisphosphate
[PtdIns(4,5)P2] to produce Ins(1,4,5)P3 and
diacylglycerol (DAG). Ins(1,4,5)P3 initiates the calcium
signaling cascade while DAG functions as an activator of
PKC. PLCgamma contains a Pleckstrin homology (PH) domain
followed by an elongation factor (EF) domain, two
catalytic regions of PLC domains that flank two tandem
SH2 domains, followed by a SH3 domain and C2 domain. The
SH3 domain of PLCgamma1 directly interacts with
dynamin-1 and can serve as a guanine nucleotide exchange
factor (GEF). It also interacts with Cbl, inhibiting its
phosphorylation and activity. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 60
Score = 47.7 bits (113), Expect = 1e-07
Identities = 19/57 (33%), Positives = 33/57 (57%), Gaps = 1/57 (1%)
Query: 154 ECLVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGL-FPATYILNM 209
+C V+AL+D+ Q EL F + +I ++ + WW G+ G +K L FP+ Y+ +
Sbjct: 3 KCAVKALFDYKAQREDELTFTKNAIIQNVEKQEGGWWRGDYGGKKQLWFPSNYVEEI 59
Score = 37.7 bits (87), Expect = 5e-04
Identities = 19/51 (37%), Positives = 32/51 (62%), Gaps = 2/51 (3%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGL-IPSNYIE 54
A D+ A EDEL+F K+ +++ + ++ W+R + GK+ L PSNY+E
Sbjct: 8 ALFDYKAQREDELTFTKNAIIQNVEKQEG-GWWRGDYGGKKQLWFPSNYVE 57
>gnl|CDD|212800 cd11866, SH3_SKAP1-like, Src Homology 3 domain of Src
Kinase-Associated Phosphoprotein 1 and similar proteins.
This subfamily is composed of SKAP1, SKAP2, and similar
proteins. SKAP1 and SKAP2 are immune cell-specific
adaptor proteins that play roles in T- and B-cell
adhesion, respectively, and are thus important in the
migration of T- and B-cells to sites of inflammation and
for movement during T-cell conjugation with
antigen-presenting cells. Both SKAP1 and SKAP2 bind to
ADAP (adhesion and degranulation-promoting adaptor
protein), among many other binding partners. They
contain a pleckstrin homology (PH) domain, a C-terminal
SH3 domain, and several tyrosine phosphorylation sites.
The SH3 domain of SKAP1 is necessary for its ability to
regulate T-cell conjugation with antigen-presenting
cells and the formation of LFA-1 clusters. SKAP1 binds
primarily to a proline-rich region of ADAP through its
SH3 domain; its degradation is regulated by ADAP. A
secondary interaction occurs via the ADAP SH3 domain and
the RKxxYxxY motif in SKAP1. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 47.4 bits (113), Expect = 1e-07
Identities = 19/51 (37%), Positives = 28/51 (54%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDR--SDQHWWHGEIGARKGLFPATYI 206
L+D + EP EL F+RGD+I + + WW GE+ + GL P Y+
Sbjct: 3 MGLWDCSGNEPDELSFKRGDLIYIISKEYDSFGWWVGELNGKVGLVPKDYL 53
Score = 40.9 bits (96), Expect = 3e-05
Identities = 18/47 (38%), Positives = 30/47 (63%), Gaps = 1/47 (2%)
Query: 8 DFNATAEDELSFRKSQVLKILNME-DDMNWYRAELDGKEGLIPSNYI 53
D + DELSF++ ++ I++ E D W+ EL+GK GL+P +Y+
Sbjct: 7 DCSGNEPDELSFKRGDLIYIISKEYDSFGWWVGELNGKVGLVPKDYL 53
Score = 26.2 bits (58), Expect = 5.2
Identities = 8/18 (44%), Positives = 11/18 (61%)
Query: 337 QALYDFTPQEPGELEFRR 354
L+D + EP EL F+R
Sbjct: 3 MGLWDCSGNEPDELSFKR 20
>gnl|CDD|212828 cd11895, SH3_FCHSD1_2, Second Src Homology 3 domain of FCH and
double SH3 domains protein 1. FCHSD1 has a domain
structure consisting of an N-terminal F-BAR (FES-CIP4
Homology and Bin/Amphiphysin/Rvs), two SH3, and
C-terminal proline-rich domains. It has only been
characterized in silico and its function is unknown. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 47.7 bits (113), Expect = 1e-07
Identities = 22/52 (42%), Positives = 30/52 (57%), Gaps = 4/52 (7%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRS----DQHWWHGEIGARKGLFPA 203
L +ALY +T Q P EL F G +I + R+ D +W GE G R G+FP+
Sbjct: 1 LARALYSYTGQSPEELSFPEGALIRLLPRAQDGVDDGFWRGEFGGRVGVFPS 52
Score = 30.7 bits (69), Expect = 0.16
Identities = 15/53 (28%), Positives = 30/53 (56%), Gaps = 3/53 (5%)
Query: 5 AKHDFNATAEDELSFRKSQVLKIL-NMED--DMNWYRAELDGKEGLIPSNYIE 54
A + + + +ELSF + ++++L +D D ++R E G+ G+ PS +E
Sbjct: 4 ALYSYTGQSPEELSFPEGALIRLLPRAQDGVDDGFWRGEFGGRVGVFPSLLVE 56
Score = 27.6 bits (61), Expect = 1.8
Identities = 10/18 (55%), Positives = 12/18 (66%)
Query: 335 LVQALYDFTPQEPGELEF 352
L +ALY +T Q P EL F
Sbjct: 1 LARALYSYTGQSPEELSF 18
>gnl|CDD|212857 cd11924, SH3_Vinexin_2, Second Src Homology 3 domain of Vinexin,
also called Sorbin and SH3 domain containing 3 (Sorbs3).
Vinexin is also called Sorbs3, SH3P3, and
SH3-containing adapter molecule 1 (SCAM-1). It is an
adaptor protein containing one sorbin homology (SoHo)
and three SH3 domains. Vinexin was first identified as a
vinculin binding protein; it is co-localized with
vinculin at cell-ECM and cell-cell adhesion sites. There
are several splice variants of vinexin: alpha, which
contains the SoHo and three SH3 domains and displays
tissue-specific expression; and beta, which contains
only the three SH3 domains and is widely expressed.
Vinexin alpha stimulates the accumulation of F-actin at
focal contact sites. Vinexin also promotes keratinocyte
migration and wound healing. The SH3 domains of vinexin
have been reported to bind a number of ligands including
vinculin, WAVE2, DLG5, Abl, and Cbl. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 47.3 bits (112), Expect = 2e-07
Identities = 18/50 (36%), Positives = 30/50 (60%), Gaps = 2/50 (4%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIG--ARKGLFPATYI 206
A Y F EL FR+G+ I + + +++W+ G I R+G+FPA+Y+
Sbjct: 5 AQYTFKGDLEVELSFRKGEHICLIRKVNENWYEGRITGTGRQGIFPASYV 54
Score = 41.1 bits (96), Expect = 3e-05
Identities = 18/56 (32%), Positives = 36/56 (64%), Gaps = 3/56 (5%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDG--KEGLIPSNYIEM 55
EA+A++ F E ELSFRK + + ++ ++ NWY + G ++G+ P++Y+++
Sbjct: 2 EAVAQYTFKGDLEVELSFRKGEHICLIRKVNE-NWYEGRITGTGRQGIFPASYVQV 56
>gnl|CDD|212852 cd11919, SH3_Sorbs1_1, First Src Homology 3 domain of Sorbin and
SH3 domain containing 1 (Sorbs1), also called ponsin.
Sorbs1 is also called ponsin, SH3P12, or CAP (c-Cbl
associated protein). It is an adaptor protein containing
one sorbin homology (SoHo) and three SH3 domains. It
binds Cbl and plays a major role in regulating the
insulin signaling pathway by enhancing insulin-induced
phosphorylation of Cbl. Sorbs1, like vinexin, localizes
at cell-ECM and cell-cell adhesion sites where it binds
vinculin, paxillin, and afadin. It may function in the
control of cell motility. Other interaction partners of
Sorbs1 include c-Abl, Sos, flotillin, Grb4, ataxin-7,
filamin C, among others. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 47.3 bits (112), Expect = 2e-07
Identities = 19/49 (38%), Positives = 31/49 (63%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+A +DF Q EL ++GD++ + + DQ+W+ GE R G+FP +YI
Sbjct: 4 RAKFDFKAQTLKELPLQKGDIVYIYKQIDQNWYEGEHHGRVGIFPRSYI 52
Score = 39.9 bits (93), Expect = 6e-05
Identities = 21/54 (38%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
A AK DF A EL +K ++ I + D NWY E G+ G+ P +YIE+
Sbjct: 2 PARAKFDFKAQTLKELPLQKGDIVYIYK-QIDQNWYEGEHHGRVGIFPRSYIEL 54
>gnl|CDD|212704 cd11770, SH3_Nephrocystin, Src Homology 3 domain of Nephrocystin
(or Nephrocystin-1). Nephrocystin contains an SH3
domain involved in signaling pathways that regulate cell
adhesion and cytoskeletal organization. It is a protein
that in humans is associated with juvenile
nephronophthisis, an inherited kidney disease
characterized by renal fibrosis that lead to chronic
renal failure in children. It is localized in cell-cell
junctions in renal duct cells, and is known to interact
with Ack1, an activated Cdc42-associated kinase. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 47.3 bits (113), Expect = 2e-07
Identities = 18/52 (34%), Positives = 30/52 (57%), Gaps = 1/52 (1%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGE-IGARKGLFPATYI 206
L +AL DF ++ G+L F++G+V+ + + WW E +GL P TY+
Sbjct: 1 LYEALSDFQAEQEGDLSFKKGEVLRIISKRADGWWLAENSKGNRGLVPKTYL 52
Score = 46.9 bits (112), Expect = 2e-07
Identities = 21/53 (39%), Positives = 32/53 (60%), Gaps = 2/53 (3%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAE-LDGKEGLIPSNYIEM 55
A DF A E +LSF+K +VL+I++ D W+ AE G GL+P Y+++
Sbjct: 3 EALSDFQAEQEGDLSFKKGEVLRIISKRAD-GWWLAENSKGNRGLVPKTYLKV 54
>gnl|CDD|212809 cd11876, SH3_MLK, Src Homology 3 domain of Mixed Lineage Kinases.
MLKs are Serine/Threonine Kinases (STKs), catalyzing the
transfer of the gamma-phosphoryl group from ATP to S/T
residues on protein substrates. MLKs act as
mitogen-activated protein kinase kinase kinases (MAP3Ks,
MKKKs, MAPKKKs), which phosphorylate and activate MAPK
kinases (MAPKKs or MKKs or MAP2Ks), which in turn
phosphorylate and activate MAPKs during signaling
cascades that are important in mediating cellular
responses to extracellular signals. MLKs play roles in
immunity and inflammation, as well as in cell death,
proliferation, and cell cycle regulation. Mammals have
four MLKs (MLK1-4), mostly conserved in vertebrates,
which contain an SH3 domain, a catalytic kinase domain,
a leucine zipper, a proline-rich region, and a CRIB
domain that mediates binding to GTP-bound Cdc42 and Rac.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 47.1 bits (112), Expect = 2e-07
Identities = 19/53 (35%), Positives = 30/53 (56%), Gaps = 5/53 (9%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRS-----DQHWWHGEIGARKGLFPATYI 206
AL+D+ + EL RRG + V + D+ WW G+IG + G+FP+ Y+
Sbjct: 4 ALFDYDARGEDELTLRRGQPVEVLSKDAAVSGDEGWWTGKIGDKVGIFPSNYV 56
Score = 41.3 bits (97), Expect = 2e-05
Identities = 18/53 (33%), Positives = 32/53 (60%), Gaps = 4/53 (7%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNME----DDMNWYRAELDGKEGLIPSNYI 53
A D++A EDEL+ R+ Q +++L+ + D W+ ++ K G+ PSNY+
Sbjct: 4 ALFDYDARGEDELTLRRGQPVEVLSKDAAVSGDEGWWTGKIGDKVGIFPSNYV 56
>gnl|CDD|212933 cd12000, SH3_CASS4, Src homology 3 domain of CAS (Crk-Associated
Substrate) scaffolding protein family member 4. CASS4,
also called HEPL (HEF1-EFS-p130Cas-like), localizes to
focal adhesions and plays a role in regulating FAK
activity, focal adhesion integrity, and cell spreading.
It is most abundant in blood cells and lung tissue, and
is also found in high levels in leukemia and ovarian
cell lines. CAS proteins function as molecular scaffolds
to regulate protein complexes that are involved in many
cellular processes. They share a common domain structure
that includes an N-terminal SH3 domain, an unstructured
substrate domain that contains many YxxP motifs, a
serine-rich four-helix bundle, and a FAT-like C-terminal
domain. The SH3 domain of CAS proteins binds to diverse
partners including FAK, FRNK, Pyk2, PTP-PEST, DOCK180,
among others. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 47.2 bits (112), Expect = 2e-07
Identities = 21/51 (41%), Positives = 30/51 (58%), Gaps = 3/51 (5%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRS---DQHWWHGEIGARKGLFPA 203
L +ALYD EL FRRGD++TV +++ + WW + R+GL PA
Sbjct: 2 LARALYDNKADCSDELAFRRGDILTVLEQNVPGSEGWWKCLLHGRQGLAPA 52
Score = 42.9 bits (101), Expect = 7e-06
Identities = 19/57 (33%), Positives = 34/57 (59%), Gaps = 2/57 (3%)
Query: 1 MEAIAKHDFNATAEDELSFRKSQVLKIL--NMEDDMNWYRAELDGKEGLIPSNYIEM 55
+ A A +D A DEL+FR+ +L +L N+ W++ L G++GL P+N +++
Sbjct: 1 LLARALYDNKADCSDELAFRRGDILTVLEQNVPGSEGWWKCLLHGRQGLAPANRLQL 57
>gnl|CDD|212910 cd11977, SH3_VAV2_2, C-terminal (or second) Src homology 3 domain
of VAV2 protein. VAV2 is widely expressed and functions
as a guanine nucleotide exchange factor (GEF) for RhoA,
RhoB and RhoG and also activates Rac1 and Cdc42. It is
implicated in many cellular and physiological functions
including blood pressure control, eye development,
neurite outgrowth and branching, EGFR endocytosis and
degradation, and cell cluster morphology, among others.
It has been reported to associate with Nek3. VAV
proteins contain several domains that enable their
function: N-terminal calponin homology (CH), acidic,
RhoGEF (also called Dbl-homologous or DH), Pleckstrin
Homology (PH), C1 (zinc finger), SH2, and two SH3
domains. The SH3 domain of VAV is involved in the
localization of proteins to specific sites within the
cell, by interacting with proline-rich sequences within
target proteins. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 58
Score = 47.3 bits (112), Expect = 2e-07
Identities = 22/50 (44%), Positives = 29/50 (58%), Gaps = 2/50 (4%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDR--SDQHWWHGEIGARKGLFPATYI 206
A Y+F ++ EL R GDV+ + R DQ WW GE R G FP+TY+
Sbjct: 5 ARYNFAARDMRELSLREGDVVRIYSRIGGDQGWWKGETNGRIGWFPSTYV 54
Score = 40.0 bits (93), Expect = 7e-05
Identities = 19/53 (35%), Positives = 33/53 (62%), Gaps = 1/53 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILN-MEDDMNWYRAELDGKEGLIPSNYIE 54
A+A+++F A ELS R+ V++I + + D W++ E +G+ G PS Y+E
Sbjct: 3 AVARYNFAARDMRELSLREGDVVRIYSRIGGDQGWWKGETNGRIGWFPSTYVE 55
>gnl|CDD|198278 cd10415, SH2_Grb10, Src homology 2 (SH2) domain found in the growth
factor receptor bound, subclass 10 (Grb10) proteins.
The Grb family binds to the epidermal growth factor
receptor (EGFR, erbB1) via their SH2 domains. Grb10 is
part of the Grb7 family of proteins which also includes
Grb7, and Grb14. They are composed of an N-terminal
Proline-rich domain, a Ras Associating-like (RA) domain,
a Pleckstrin Homology (PH) domain, a phosphotyrosine
interaction region (PIR, BPS) and a C-terminal SH2
domain. The SH2 domains of Grb7, Grb10 and Grb14
preferentially bind to a different RTK. Grb10 has been
shown to interact with many different proteins,
including the insulin and IGF1 receptors,
platelet-derived growth factor (PDGF) receptor-beta,
Ret, Kit, Raf1 and MEK1, and Nedd4. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 108
Score = 48.9 bits (116), Expect = 2e-07
Identities = 24/87 (27%), Positives = 53/87 (60%), Gaps = 7/87 (8%)
Query: 56 KNHDWYYGRITRADAERLLSNKH--EGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLR-D 112
+ W++GRI+R ++ R++ + +G FL+R S+S+P F L++ +++F++L +
Sbjct: 3 RTQHWFHGRISREESHRIIKQQGLVDGLFLLRDSQSNPKAFVLTLCHHQKIKNFQILPCE 62
Query: 113 SSGKFFLWV----VKFNSLNELVEYHR 135
G+ F + KF+ L +LV++++
Sbjct: 63 DDGQTFFSLDDGNTKFSDLIQLVDFYQ 89
Score = 48.9 bits (116), Expect = 2e-07
Identities = 24/87 (27%), Positives = 53/87 (60%), Gaps = 7/87 (8%)
Query: 235 KNHDWYYGRITRADAERLLSNKH--EGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLR-D 291
+ W++GRI+R ++ R++ + +G FL+R S+S+P F L++ +++F++L +
Sbjct: 3 RTQHWFHGRISREESHRIIKQQGLVDGLFLLRDSQSNPKAFVLTLCHHQKIKNFQILPCE 62
Query: 292 SSGKFFLWV----VKFNSLNELVEYHR 314
G+ F + KF+ L +LV++++
Sbjct: 63 DDGQTFFSLDDGNTKFSDLIQLVDFYQ 89
>gnl|CDD|198175 cd09919, SH2_STAT_family, Src homology 2 (SH2) domain found in
signal transducer and activator of transcription (STAT)
family. STAT proteins mediate the signaling of
cytokines and a number of growth factors from the
receptors of these extracellular signaling molecules to
the cell nucleus. STATs are specifically phosphorylated
by receptor-associated Janus kinases, receptor tyrosine
kinases, or cytoplasmic tyrosine kinases. The
phosphorylated STAT molecules dimerize by reciprocal
binding of their SH2 domains to the phosphotyrosine
residues. These dimeric STATs translocate into the
nucleus, bind to specific DNA sequences, and regulate
the transcription of their target genes. However there
are a number of unphosphorylated STATs that travel
between the cytoplasm and nucleus and some STATs that
exist as dimers in unstimulated cells that can exert
biological functions independent of being activated by a
receptor. There are seven mammalian STAT family members
which have been identified: STAT1, STAT2, STAT3, STAT4,
STAT5 (STAT5A and STAT5B), and STAT6. There are 6
conserved domains in STAT: N-terminal domain (NTD),
coiled-coil domain (CCD), DNA-binding domain (DBD),
alpha-helical linker domain (LD), SH2 domain, and
transactivation domain (TAD). NTD is involved in
dimerization of unphosphorylated STATs monomers and for
the tetramerization between STAT1, STAT3, STAT4 and
STAT5 on promoters with two or more tandem STAT binding
sites. It also plays a role in promoting interactions
with transcriptional co-activators such as CREB binding
protein (CBP)/p300, as well as being important for
nuclear import and deactivation of STATs involving
tyrosine de-phosphorylation. The CCD interacts with
other proteins, such as IFN regulatory protein 9
(IRF-9/p48) with STAT1 and c-JUN with STAT3 and is also
thought to participate in the negative regulation of
these proteins. Distinct genes are bound to STATs via
their DBD domain. This domain is also involved in
nuclear translocation of activated STAT1 and STAT3
phosphorylated dimers upon cytokine stimulation. LD
links the DNA-binding and SH2 domains and is important
for the transcriptional activation of STAT1 in response
to IFN-gamma. It also plays a role in protein-protein
interactions and has also been implicated in the
constitutive nucleocytoplasmic shuttling of
unphosphorylated STATs in resting cells. The SH2 domain
is necessary for receptor association and tyrosine
phosphodimer formation. Residues within this domain may
be particularly important for some cellular functions
mediated by the STATs as well as residues adjacent to
this domain. The TAD interacts with several proteins,
namely minichromosome maintenance complex component 5
(MCM5), breast cancer 1 (BRCA1) and CBP/p300. TAD also
contains a modulatory phosphorylation site that
regulates STAT activity and is necessary for maximal
transcription of a number of target genes. The conserved
tyrosine residue present in the C-terminus is crucial
for dimerization via interaction with the SH2 domain
upon the interaction of the ligand with the receptor.
STAT activation by tyrosine phosphorylation also
determines nuclear import and retention, DNA binding to
specific DNA elements in the promoters of responsive
genes, and transcriptional activation of STAT dimers. In
addition to the SH2 domain there is a coiled-coil
domain, a DNA binding domain, and a transactivation
domain in the STAT proteins. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 115
Score = 48.7 bits (117), Expect = 2e-07
Identities = 16/52 (30%), Positives = 26/52 (50%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLR 111
G I++ +AE LL K G FL+R S+S G +++ D +V+
Sbjct: 21 LIMGFISKEEAEDLLKKKPPGTFLLRFSDSELGGITIAWVNEDPDGQSQVIH 72
Score = 48.7 bits (117), Expect = 2e-07
Identities = 16/52 (30%), Positives = 26/52 (50%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLR 290
G I++ +AE LL K G FL+R S+S G +++ D +V+
Sbjct: 21 LIMGFISKEEAEDLLKKKPPGTFLLRFSDSELGGITIAWVNEDPDGQSQVIH 72
>gnl|CDD|212932 cd11999, SH3_PACSIN_like, Src homology 3 domain of an unknown
subfamily of proteins with similarity to Protein kinase
C and Casein kinase Substrate in Neurons (PACSIN)
proteins. PACSINs, also called Synaptic
dynamin-associated proteins (Syndapins), act as
regulators of cytoskeletal and membrane dynamics. They
bind both dynamin and Wiskott-Aldrich syndrome protein
(WASP), and may provide direct links between the actin
cytoskeletal machinery through WASP and
dynamin-dependent endocytosis. Vetebrates harbor three
isoforms with distinct expression patterns and specific
functions. PACSINs contain an N-terminal F-BAR domain
and a C-terminal SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 47.2 bits (112), Expect = 2e-07
Identities = 22/53 (41%), Positives = 31/53 (58%), Gaps = 2/53 (3%)
Query: 157 VQALYDFTPQEPGELEFRRGDVIT-VTDRSDQHW-WHGEIGARKGLFPATYIL 207
V+A+YD+T QEP EL F+ G+ + V D +Q W G GL+PA Y+
Sbjct: 4 VRAVYDYTGQEPDELSFKAGEELLKVEDEDEQGWCKGVTDGGAVGLYPANYVE 56
Score = 38.8 bits (90), Expect = 2e-04
Identities = 19/51 (37%), Positives = 28/51 (54%), Gaps = 1/51 (1%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELD-GKEGLIPSNYIE 54
A +D+ DELSF+ + L + ED+ W + D G GL P+NY+E
Sbjct: 6 AVYDYTGQEPDELSFKAGEELLKVEDEDEQGWCKGVTDGGAVGLYPANYVE 56
Score = 27.2 bits (60), Expect = 2.2
Identities = 11/18 (61%), Positives = 15/18 (83%)
Query: 336 VQALYDFTPQEPGELEFR 353
V+A+YD+T QEP EL F+
Sbjct: 4 VRAVYDYTGQEPDELSFK 21
>gnl|CDD|212785 cd11851, SH3_RIM-BP, Src homology 3 domains of Rab3-interacting
molecules (RIMs) binding proteins. RIMs binding
proteins (RBPs, RIM-BPs) associate with calcium
channels present in photoreceptors, neurons, and hair
cells; they interact simultaneously with specific
calcium channel subunits, and active zone proteins,
RIM1 and RIM2. RIMs are part of the matrix at the
presynaptic active zone and are associated with
synaptic vesicles through their interaction with the
small GTPase Rab3. RIM-BPs play a role in regulating
synaptic transmission by serving as adaptors and
linking calcium channels with the synaptic vesicle
release machinery. RIM-BPs contain three SH3 domains
and two to three fibronectin III repeats. Invertebrates
contain one, while vertebrates contain at least two
RIM-BPs, RIM-BP1 and RIM-BP2. RIM-BP1 is also called
peripheral-type benzodiazapine receptor associated
protein 1 (PRAX-1). Mammals contain a third protein,
RIM-BP3. RIM-BP1 and RIM-BP2 are predominantly
expressed in the brain where they display overlapping
but distinct expression patterns, while RIM-BP3 is
almost exclusively expressed in the testis and is
essential in spermiogenesis. The SH3 domains of RIM-BPs
bind to the PxxP motifs of RIM1, RIM2, and L-type
(alpha1D) and N-type (alpha1B) calcium channel
subunits. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate
affinity and selectivity. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 62
Score = 47.3 bits (113), Expect = 2e-07
Identities = 17/46 (36%), Positives = 29/46 (63%), Gaps = 1/46 (2%)
Query: 10 NATAEDELSFRKSQVLKILNMEDDMNWYRAEL-DGKEGLIPSNYIE 54
N E+ELSF V+++ D+ +Y EL G++GL+PSN+++
Sbjct: 16 NDDPEEELSFHAGDVVRVYGPMDEDGFYYGELEGGRKGLVPSNFVQ 61
Score = 41.5 bits (98), Expect = 2e-05
Identities = 24/86 (27%), Positives = 38/86 (44%), Gaps = 33/86 (38%)
Query: 156 LVQALYDFTPQE-------PGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILN 208
L+ ALYD+ P+ EL F GDV+ V +G +
Sbjct: 1 LMVALYDYNPETMSPNDDPEEELSFHAGDVVRV---------YGPM-------------- 37
Query: 209 MEDDMNWYRAEL-DGKEGLIPSNYIE 233
D+ +Y EL G++GL+PSN+++
Sbjct: 38 --DEDGFYYGELEGGRKGLVPSNFVQ 61
>gnl|CDD|212946 cd12013, SH3_RIM-BP_3, Third Src homology 3 domain of
Rab3-interacting molecules (RIMs) binding proteins.
RIMs binding proteins (RBPs, RIM-BPs) associate with
calcium channels present in photoreceptors, neurons, and
hair cells; they interact simultaneously with specific
calcium channel subunits, and active zone proteins, RIM1
and RIM2. RIMs are part of the matrix at the presynaptic
active zone and are associated with synaptic vesicles
through their interaction with the small GTPase Rab3.
RIM-BPs play a role in regulating synaptic transmission
by serving as adaptors and linking calcium channels with
the synaptic vesicle release machinery. RIM-BPs contain
three SH3 domains and two to three fibronectin III
repeats. Invertebrates contain one, while vertebrates
contain at least two RIM-BPs, RIM-BP1 and RIM-BP2.
RIM-BP1 is also called peripheral-type benzodiazapine
receptor associated protein 1 (PRAX-1). Mammals contain
a third protein, RIM-BP3. RIM-BP1 and RIM-BP2 are
predominantly expressed in the brain where they display
overlapping but distinct expression patterns, while
RIM-BP3 is almost exclusively expressed in the testis
and is essential in spermiogenesis. The SH3 domains of
RIM-BPs bind to the PxxP motifs of RIM1, RIM2, and
L-type (alpha1D) and N-type (alpha1B) calcium channel
subunits. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 61
Score = 47.0 bits (112), Expect = 3e-07
Identities = 28/82 (34%), Positives = 40/82 (48%), Gaps = 32/82 (39%)
Query: 159 ALYDFTPQEPG-------ELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMED 211
AL+D+ P+E EL FR GD+ITV GE M++
Sbjct: 4 ALFDYDPRESSPNVDAEVELSFRAGDIITV---------FGE---------------MDE 39
Query: 212 DMNWYRAELDGKEGLIPSNYIE 233
D +Y EL+G+ GL+PSN++E
Sbjct: 40 D-GFYYGELNGQRGLVPSNFLE 60
Score = 45.8 bits (109), Expect = 7e-07
Identities = 19/45 (42%), Positives = 29/45 (64%)
Query: 10 NATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
N AE ELSFR ++ + D+ +Y EL+G+ GL+PSN++E
Sbjct: 16 NVDAEVELSFRAGDIITVFGEMDEDGFYYGELNGQRGLVPSNFLE 60
>gnl|CDD|212989 cd12056, SH3_CD2AP_3, Third Src Homology 3 domain (SH3C) of
CD2-associated protein. CD2AP, also called CMS (Cas
ligand with Multiple SH3 domains) or METS1
(Mesenchyme-to-Epithelium Transition protein with SH3
domains), is a cytosolic adaptor protein that plays a
role in regulating the cytoskeleton. It is critical in
cell-to-cell union necessary for kidney function. It
also stabilizes the contact between a T cell and
antigen-presenting cells. It is primarily expressed in
podocytes at the cytoplasmic face of the slit diaphragm
and serves as a linker anchoring podocin and nephrin to
the actin cytoskeleton. CD2AP contains three SH3
domains, a proline-rich region, and a C-terminal
coiled-coil domain. All of these domains enable CD2AP
to bind various protein partners and assemble complexes
that have been implicated in many different functions.
This alignment model represents the third SH3 domain
(SH3C) of CD2AP. SH3C has been shown to bind ubiquitin.
SH3 domains are protein interaction domains that bind
to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 46.7 bits (111), Expect = 3e-07
Identities = 17/50 (34%), Positives = 33/50 (66%), Gaps = 1/50 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMED-DMNWYRAELDGKEGLIPSNYI 53
A + T EDEL F++ +++ I++ + + W++ EL+GKEG+ P N++
Sbjct: 6 ALFHYEGTNEDELDFKEGEIILIISKDTGEPGWWKGELNGKEGVFPDNFV 55
Score = 35.6 bits (82), Expect = 0.002
Identities = 19/75 (25%), Positives = 34/75 (45%), Gaps = 24/75 (32%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYR 217
+AL+ + EL+F+ G++I + + GE G W++
Sbjct: 5 KALFHYEGTNEDELDFKEGEIILIISKDT-----GEPG-------------------WWK 40
Query: 218 AELDGKEGLIPSNYI 232
EL+GKEG+ P N++
Sbjct: 41 GELNGKEGVFPDNFV 55
>gnl|CDD|198246 cd10383, SH2_SOCS2, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 103
Score = 48.3 bits (115), Expect = 3e-07
Identities = 28/98 (28%), Positives = 47/98 (47%), Gaps = 9/98 (9%)
Query: 54 EMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDS 113
E+ WY+G +T +A+ L + EG FL+R S S ++SVK S G + ++
Sbjct: 3 ELSQTGWYWGSMTVNEAKEKLQDAPEGTFLVRDSSHSDYLLTISVKTSAGPTNLRI-EYQ 61
Query: 114 SGKFFLWVV--------KFNSLNELVEYHRTASVSRSQ 143
GKF L + +F+S+ L+EY+ +
Sbjct: 62 DGKFRLDSIICVKSKLKQFDSVVHLIEYYVQMCKDKRT 99
Score = 48.3 bits (115), Expect = 3e-07
Identities = 28/98 (28%), Positives = 47/98 (47%), Gaps = 9/98 (9%)
Query: 233 EMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDS 292
E+ WY+G +T +A+ L + EG FL+R S S ++SVK S G + ++
Sbjct: 3 ELSQTGWYWGSMTVNEAKEKLQDAPEGTFLVRDSSHSDYLLTISVKTSAGPTNLRI-EYQ 61
Query: 293 SGKFFLWVV--------KFNSLNELVEYHRTASVSRSQ 322
GKF L + +F+S+ L+EY+ +
Sbjct: 62 DGKFRLDSIICVKSKLKQFDSVVHLIEYYVQMCKDKRT 99
>gnl|CDD|198270 cd10407, SH2_Vav3, Src homology 2 (SH2) domain found in the Vav3
proteins. Proto-oncogene vav is a member of the Dbl
family of guanine nucleotide exchange factors (GEF) for
the Rho family of GTP binding proteins. All vavs are
activated by tyrosine phosphorylation leading to their
activation. There are three Vav mammalian family
members: Vav1 which is expressed in the hematopoietic
system, and Vav2 and Vav3 are more ubiquitously
expressed. Vav3 preferentially activates RhoA, RhoG and,
to a lesser extent, Rac1. Alternatively spliced
transcript variants encoding different isoforms have
been described for this gene. VAV3 has been shown to
interact with Grb2. Vav proteins are involved in several
processes that require cytoskeletal reorganization, such
as the formation of the immunological synapse (IS),
phagocytosis, platelet aggregation, spreading, and
transformation. Vavs function as guanine nucleotide
exchange factors (GEFs) for the Rho/Rac family of
GTPases. Vav family members have several conserved
motifs/domains including: a leucine-rich region, a
leucine-zipper, a calponin homology (CH) domain, an
acidic domain, a Dbl-homology (DH) domain, a pleckstrin
homology (PH) domain, a cysteine-rich domain, 2 SH3
domains, a proline-rich region, and a SH2 domain. Vavs
are the only known Rho GEFs that have both the DH/PH
motifs and SH2/SH3 domains in the same protein. The
leucine-rich helix-loop-helix (HLH) domain is thought to
be involved in protein heterodimerization with other HLH
proteins and it may function as a negative regulator by
forming inactive heterodimers. The CH domain is usually
involved in the association with filamentous actin, but
in Vav it controls NFAT stimulation, Ca2+ mobilization,
and its transforming activity. Acidic domains are
involved in protein-protein interactions and contain
regulatory tyrosines. The DH domain is a GDP-GTP
exchange factor on Rho/Rac GTPases. The PH domain in
involved in interactions with GTP-binding proteins,
lipids and/or phosphorylated serine/threonine residues.
The SH3 domain is involved in localization of proteins
to specific sites within the cell interacting with
protein with proline-rich sequences. The SH2 domain
mediates a high affinity interaction with tyrosine
phosphorylated proteins. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 48.1 bits (114), Expect = 3e-07
Identities = 31/92 (33%), Positives = 48/92 (52%), Gaps = 3/92 (3%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
WY G + R AE L N+ +L+R G++++S+K ++ V+H K+L
Sbjct: 7 WYAGAMERLQAETELINRVNSTYLVRHRTKESGEYAISIKYNNEVKHIKILTRDGFFHIA 66
Query: 120 WVVKFNSLNELVEYHRTASVS---RSQDVKLR 148
KF SL ELVEY++ S+ RS D L+
Sbjct: 67 ENRKFKSLMELVEYYKHHSLKEGFRSLDTTLQ 98
Score = 48.1 bits (114), Expect = 3e-07
Identities = 31/92 (33%), Positives = 48/92 (52%), Gaps = 3/92 (3%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
WY G + R AE L N+ +L+R G++++S+K ++ V+H K+L
Sbjct: 7 WYAGAMERLQAETELINRVNSTYLVRHRTKESGEYAISIKYNNEVKHIKILTRDGFFHIA 66
Query: 299 WVVKFNSLNELVEYHRTASVS---RSQDVKLR 327
KF SL ELVEY++ S+ RS D L+
Sbjct: 67 ENRKFKSLMELVEYYKHHSLKEGFRSLDTTLQ 98
>gnl|CDD|212727 cd11793, SH3_ephexin1_like, Src homology 3 domain of ephexin-1-like
SH3 domain containing Rho guanine nucleotide exchange
factors. Members of this family contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin Homology (PH),
and C-terminal SH3 domains. They include the Rho guanine
nucleotide exchange factors ARHGEF5, ARHGEF16, ARHGEF19,
ARHGEF26, ARHGEF27 (also called ephexin-1), and similar
proteins, and are also called ephexins because they
interact directly with ephrin A receptors. GEFs interact
with Rho GTPases via their DH domains to catalyze
nucleotide exchange by stabilizing the nucleotide-free
GTPase intermediate. They play important roles in
neuronal development. The SH3 domains of ARHGEFs play an
autoinhibitory role through intramolecular interactions
with a proline-rich region N-terminal to the DH domain.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 46.6 bits (111), Expect = 3e-07
Identities = 18/51 (35%), Positives = 28/51 (54%), Gaps = 2/51 (3%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGE--IGARKGLFPATY 205
VQ ++ +T Q+P EL GDV+ V + W+ GE +G FP++Y
Sbjct: 2 VQCVHAYTAQQPDELTLEEGDVVNVLRKMPDGWYEGERLRDGERGWFPSSY 52
Score = 38.5 bits (90), Expect = 2e-04
Identities = 18/55 (32%), Positives = 26/55 (47%), Gaps = 3/55 (5%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAE--LDGKEGLIPSNYIE 54
+ H + A DEL+ + V+ +L D WY E DG+ G PS+Y E
Sbjct: 1 QVQCVHAYTAQQPDELTLEEGDVVNVLRKMPD-GWYEGERLRDGERGWFPSSYTE 54
>gnl|CDD|212985 cd12052, SH3_CIN85_1, First Src Homology 3 domain (SH3A) of
Cbl-interacting protein of 85 kDa. CIN85, also called
SH3 domain-containing kinase-binding protein 1 (SH3KBP1)
or CD2-binding protein 3 (CD2BP3) or Ruk, is an adaptor
protein that is involved in the downregulation of
receptor tyrosine kinases by facilitating endocytosis
through interaction with endophilin-associated ubiquitin
ligase Cbl proteins. It is also important in many other
cellular processes including vesicle-mediated transport,
cytoskeletal remodelling, apoptosis, cell adhesion and
migration, and viral infection, among others. CIN85
exists as multiple variants from alternative splicing;
the main variant contains three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CIN85 to bind
various protein partners and assemble complexes that
have been implicated in many different functions. This
alignment model represents the first SH3 domain (SH3A)
of CIN85; SH3A binds to internal proline-rich motifs
within the proline-rich region. This intramolecular
interaction serves as a regulatory mechanism to keep
CIN85 in a closed conformation, preventing the
recruitment of other proteins. SH3A has also been shown
to bind ubiquitin and to an atypical PXXXPR motif at the
C-terminus of Cbl and the cytoplasmic end of the cell
adhesion protein CD2. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 46.8 bits (111), Expect = 3e-07
Identities = 19/46 (41%), Positives = 26/46 (56%)
Query: 161 YDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+D+ Q EL GD+IT + D WW GEI R+GLFP ++
Sbjct: 6 FDYKAQHEDELTITVGDIITKIKKDDGGWWEGEIKGRRGLFPDNFV 51
Score = 42.2 bits (99), Expect = 1e-05
Identities = 18/52 (34%), Positives = 30/52 (57%), Gaps = 1/52 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
EAI + D+ A EDEL+ ++ + +DD W+ E+ G+ GL P N++
Sbjct: 1 EAIVEFDYKAQHEDELTITVGDIITKIK-KDDGGWWEGEIKGRRGLFPDNFV 51
>gnl|CDD|212893 cd11960, SH3_Abp1_eu, Src homology 3 domain of eumetazoan
Actin-binding protein 1. Abp1, also called drebrin-like
protein, is an adaptor protein that functions in
receptor-mediated endocytosis and vesicle trafficking.
It contains an N-terminal actin-binding module, the
actin-depolymerizing factor (ADF) homology domain, a
helical domain, and a C-terminal SH3 domain. Mammalian
Abp1, unlike yeast Abp1, does not contain an acidic
domain that interacts with the Arp2/3 complex. It
regulates actin dynamics indirectly by interacting with
dynamin and WASP family proteins. Abp1 deficiency causes
abnormal organ structure and function of the spleen,
heart, and lung of mice. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 46.6 bits (111), Expect = 3e-07
Identities = 20/51 (39%), Positives = 29/51 (56%), Gaps = 1/51 (1%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHG-EIGARKGLFPATYI 206
+ALYD+ + E+ F GD+IT ++ D+ WW G GLFPA Y+
Sbjct: 2 ARALYDYQAADDTEISFDPGDIITDIEQIDEGWWRGTGPDGTYGLFPANYV 52
Score = 37.8 bits (88), Expect = 4e-04
Identities = 17/53 (32%), Positives = 28/53 (52%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
A A +D+ A + E+SF ++ + D+ W DG GL P+NY+E+
Sbjct: 2 ARALYDYQAADDTEISFDPGDIITDIEQIDEGWWRGTGPDGTYGLFPANYVEL 54
>gnl|CDD|198276 cd10413, SH2_Grb7, Src homology 2 (SH2) domain found in the growth
factor receptor bound, subclass 7 (Grb7) proteins. The
Grb family binds to the epidermal growth factor receptor
(EGFR, erbB1) via their SH2 domains. Grb7 is part of the
Grb7 family of proteins which also includes Grb10, and
Grb14. They are composed of an N-terminal Proline-rich
domain, a Ras Associating-like (RA) domain, a Pleckstrin
Homology (PH) domain, a phosphotyrosine interaction
region (PIR, BPS) and a C-terminal SH2 domain. The SH2
domains of Grb7, Grb10 and Grb14 preferentially bind to
a different RTK. Grb7 binds strongly to the erbB2
receptor, unlike Grb10 and Grb14 which bind weakly to
it. Grb7 family proteins are phosphorylated on
serine/threonine as well as tyrosine residues. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 108
Score = 48.4 bits (115), Expect = 3e-07
Identities = 26/87 (29%), Positives = 51/87 (58%), Gaps = 7/87 (8%)
Query: 56 KNHDWYYGRITRADAERLLSNKH--EGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLR-D 112
+ W++GRI+R +++RL+ + +G FL+R S+ +P F LS+ V+H+ +L +
Sbjct: 3 RTQPWFHGRISREESQRLIGQQGLVDGVFLVRESQRNPQGFVLSLCHLQKVKHYLILPSE 62
Query: 113 SSGKFFLWV----VKFNSLNELVEYHR 135
G+ + + +F L +LVE+H+
Sbjct: 63 EEGRLYFSMDDGQTRFTDLLQLVEFHQ 89
Score = 48.4 bits (115), Expect = 3e-07
Identities = 26/87 (29%), Positives = 51/87 (58%), Gaps = 7/87 (8%)
Query: 235 KNHDWYYGRITRADAERLLSNKH--EGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLR-D 291
+ W++GRI+R +++RL+ + +G FL+R S+ +P F LS+ V+H+ +L +
Sbjct: 3 RTQPWFHGRISREESQRLIGQQGLVDGVFLVRESQRNPQGFVLSLCHLQKVKHYLILPSE 62
Query: 292 SSGKFFLWV----VKFNSLNELVEYHR 314
G+ + + +F L +LVE+H+
Sbjct: 63 EEGRLYFSMDDGQTRFTDLLQLVEFHQ 89
>gnl|CDD|212994 cd12061, SH3_betaPIX, Src Homology 3 domain of beta-Pak Interactive
eXchange factor. Beta-PIX, also called Rho guanine
nucleotide exchange factor 7 (ARHGEF7) or Cool (Cloned
out of Library)-1, activates small GTPases by exchanging
bound GDP for free GTP. It acts as a GEF for both Cdc42
and Rac 1, and plays important roles in regulating
neuroendocrine exocytosis, focal adhesion maturation,
cell migration, synaptic vesicle localization, and
insulin secretion. PIX proteins contain an N-terminal
SH3 domain followed by RhoGEF (also called
Dbl-homologous or DH) and Pleckstrin Homology (PH)
domains, and a C-terminal leucine-zipper domain for
dimerization. The SH3 domain of PIX binds to an atypical
PxxxPR motif in p21-activated kinases (PAKs) with high
affinity. The binding of PAKs to PIX facilitate the
localization of PAKs to focal complexes and also
localizes PAKs to PIX targets Cdc43 and Rac, leading to
the activation of PAKs. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 46.6 bits (110), Expect = 3e-07
Identities = 20/51 (39%), Positives = 28/51 (54%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+V+A ++F EL F +GDVI VT + WW G R G FP+ Y+
Sbjct: 1 VVRAKFNFQQTNEDELSFSKGDVIHVTRVEEGGWWEGTHNGRTGWFPSNYV 51
Score = 44.7 bits (105), Expect = 1e-06
Identities = 20/49 (40%), Positives = 29/49 (59%), Gaps = 1/49 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
AK +F T EDELSF K V+ + +E+ W+ +G+ G PSNY+
Sbjct: 4 AKFNFQQTNEDELSFSKGDVIHVTRVEEG-GWWEGTHNGRTGWFPSNYV 51
>gnl|CDD|212991 cd12058, SH3_MLK4, Src Homology 3 domain of Mixed Lineage Kinase 4.
MLK4 is a Serine/Threonine Kinase (STK), catalyzing the
transfer of the gamma-phosphoryl group from ATP to S/T
residues on protein substrates. MLKs act as
mitogen-activated protein kinase kinase kinases (MAP3Ks,
MKKKs, MAPKKKs), which phosphorylate and activate MAPK
kinases (MAPKKs or MKKs or MAP2Ks), which in turn
phosphorylate and activate MAPKs during signaling
cascades that are important in mediating cellular
responses to extracellular signals. MLKs play roles in
immunity and inflammation, as well as in cell death,
proliferation, and cell cycle regulation. The specific
function of MLK4 is yet to be determined. Mutations in
the kinase domain of MLK4 have been detected in
colorectal cancers. MLK4 contains an SH3 domain, a
catalytic kinase domain, a leucine zipper, a
proline-rich region, and a CRIB domain that mediates
binding to GTP-bound Cdc42 and Rac. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 46.5 bits (110), Expect = 3e-07
Identities = 24/56 (42%), Positives = 30/56 (53%), Gaps = 5/56 (8%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRS-----DQHWWHGEIGARKGLFPATYI 206
L ALYD+ EL RRGDV+ V + D WW G+I R G+FPA Y+
Sbjct: 1 LWTALYDYEASGEDELSLRRGDVVEVLSQDAAVSGDDGWWAGKIRHRLGIFPANYV 56
Score = 40.3 bits (94), Expect = 6e-05
Identities = 17/53 (32%), Positives = 33/53 (62%), Gaps = 4/53 (7%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNME----DDMNWYRAELDGKEGLIPSNYI 53
A +D+ A+ EDELS R+ V+++L+ + D W+ ++ + G+ P+NY+
Sbjct: 4 ALYDYEASGEDELSLRRGDVVEVLSQDAAVSGDDGWWAGKIRHRLGIFPANYV 56
>gnl|CDD|212707 cd11773, SH3_Sla1p_1, First Src Homology 3 domain of the fungal
endocytic adaptor protein Sla1p. Sla1p facilitates
endocytosis by playing a role as an adaptor protein in
coupling components of the actin cytoskeleton to the
endocytic machinery. It interacts with Abp1p, Las17p and
Pan1p, which are activator proteins of actin-related
protein 2/3 (Arp2/3). Sla1p contains multiple domains
including three SH3 domains, a SAM (sterile alpha motif)
domain, and a Sla1 homology domain 1 (SHD1), which binds
to the NPFXD motif that is found in many integral
membrane proteins such as the Golgi-localized
Arf-binding protein Lsb5p and the P4-ATPases, Drs2p and
Dnf1p. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 46.6 bits (111), Expect = 3e-07
Identities = 21/76 (27%), Positives = 34/76 (44%), Gaps = 19/76 (25%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNW 215
+ +ALYD+ PQ EL + D++ + ++SD WW ++ N DD
Sbjct: 1 VYKALYDYEPQTEDELTIQEDDILYLLEKSDDDWWKVKLKV-----------NSSDD--- 46
Query: 216 YRAELDGKEGLIPSNY 231
D GL+P+ Y
Sbjct: 47 -----DEPVGLVPATY 57
Score = 39.3 bits (92), Expect = 1e-04
Identities = 17/55 (30%), Positives = 30/55 (54%), Gaps = 8/55 (14%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAEL-------DGKEGLIPSNY 52
A +D+ EDEL+ ++ +L +L DD +W++ +L D GL+P+ Y
Sbjct: 4 ALYDYEPQTEDELTIQEDDILYLLEKSDD-DWWKVKLKVNSSDDDEPVGLVPATY 57
Score = 31.2 bits (71), Expect = 0.084
Identities = 13/49 (26%), Positives = 21/49 (42%), Gaps = 13/49 (26%)
Query: 335 LVQALYDFTPQEPGELEFRRD-------------LKIKRRKSAKTKDET 370
+ +ALYD+ PQ EL + D K+K + ++ DE
Sbjct: 1 VYKALYDYEPQTEDELTIQEDDILYLLEKSDDDWWKVKLKVNSSDDDEP 49
>gnl|CDD|212906 cd11973, SH3_ASEF, Src homology 3 domain of APC-Stimulated guanine
nucleotide Exchange Factor. ASEF, also called ARHGEF4,
exists in an autoinhibited form and is activated upon
binding of the tumor suppressor APC (adenomatous
polyposis coli). GEFs activate small GTPases by
exchanging bound GDP for free GTP. ASEF can activate
Rac1 or Cdc42. Truncated ASEF, which is found in
colorectal cancers, is constitutively active and has
been shown to promote angiogenesis and cancer cell
migration. ASEF contains a SH3 domain followed by RhoGEF
(also called Dbl-homologous or DH) and Pleckstrin
Homology (PH) domains. In its autoinhibited form, the
SH3 domain of ASEF forms an extensive interface with the
DH and PH domains, blocking the Rac binding site. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 73
Score = 46.9 bits (111), Expect = 3e-07
Identities = 19/49 (38%), Positives = 31/49 (63%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+AL+D + EL F+ GDVI V D +++ WW G + +G FPA+++
Sbjct: 21 EALWDHVTMDDQELGFKAGDVIEVMDATNKEWWWGRVLDSEGWFPASFV 69
>gnl|CDD|212890 cd11957, SH3_RUSC2, Src homology 3 domain of RUN and SH3
domain-containing protein 2. RUSC2, also called Iporin
or Interacting protein of Rab1, is expressed
ubiquitously with highest amounts in the brain and
testis. It interacts with the small GTPase Rab1 and the
Golgi matrix protein GM130, and may function in linking
GTPases to certain intracellular signaling pathways.
RUSC proteins are adaptor proteins consisting of RUN,
leucine zipper, and SH3 domains. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 52
Score = 46.4 bits (110), Expect = 3e-07
Identities = 19/50 (38%), Positives = 27/50 (54%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V+AL EPG+L F +GD++ V R+D W +G GL P Y+
Sbjct: 2 VKALCHHIATEPGQLSFNKGDILQVLSRADGDWLRCSLGPDSGLVPIAYV 51
Score = 34.9 bits (80), Expect = 0.004
Identities = 16/43 (37%), Positives = 24/43 (55%), Gaps = 1/43 (2%)
Query: 11 ATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
AT +LSF K +L++L+ D +W R L GL+P Y+
Sbjct: 10 ATEPGQLSFNKGDILQVLSRADG-DWLRCSLGPDSGLVPIAYV 51
>gnl|CDD|212935 cd12002, SH3_NEDD9, Src homology 3 domain of CAS (Crk-Associated
Substrate) scaffolding protein family member, Neural
precursor cell Expressed, Developmentally Down-regulated
9. NEDD9 is also called human enhancer of filamentation
1 (HEF1) or CAS-L (Crk-associated substrate in
lymphocyte). It was first described as a gene
predominantly expressed in early embryonic brain, and
was also isolated from a screen of human proteins that
regulate filamentous budding in yeast, and as a tyrosine
phosphorylated protein in lymphocytes. It promotes
metastasis in different solid tumors. NEDD9 localizes in
focal adhesions and associates with FAK and Abl kinase.
It also interacts with SMAD3 and the proteasomal
machinery which allows its rapid turnover; these
interactions are not shared by other CAS proteins. CAS
proteins function as molecular scaffolds to regulate
protein complexes that are involved in many cellular
processes. They share a common domain structure that
includes an N-terminal SH3 domain, an unstructured
substrate domain that contains many YxxP motifs, a
serine-rich four-helix bundle, and a FAT-like C-terminal
domain. The SH3 domain of CAS proteins binds to diverse
partners including FAK, FRNK, Pyk2, PTP-PEST, DOCK180,
among others. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 46.5 bits (110), Expect = 4e-07
Identities = 18/50 (36%), Positives = 30/50 (60%), Gaps = 3/50 (6%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQ---HWWHGEIGARKGLFP 202
+ +ALYD P+ EL FR+GD++TV +++ WW + R+G+ P
Sbjct: 1 MARALYDNVPECAEELAFRKGDILTVIEQNTGGLEGWWLCSLHGRQGIAP 50
Score = 34.6 bits (79), Expect = 0.005
Identities = 16/55 (29%), Positives = 29/55 (52%), Gaps = 2/55 (3%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKIL--NMEDDMNWYRAELDGKEGLIPSNYIEM 55
A A +D +EL+FRK +L ++ N W+ L G++G+ P N +++
Sbjct: 2 ARALYDNVPECAEELAFRKGDILTVIEQNTGGLEGWWLCSLHGRQGIAPGNRLKL 56
>gnl|CDD|212993 cd12060, SH3_alphaPIX, Src Homology 3 domain of alpha-Pak
Interactive eXchange factor. Alpha-PIX, also called Rho
guanine nucleotide exchange factor 6 (ARHGEF6) or Cool
(Cloned out of Library)-2, activates small GTPases by
exchanging bound GDP for free GTP. It acts as a GEF for
both Cdc42 and Rac 1, and is localized in dendritic
spines where it regulates spine morphogenesis. It
controls dendritic length and spine density in the
hippocampus. Mutations in the ARHGEF6 gene cause
X-linked intellectual disability in humans. PIX proteins
contain an N-terminal SH3 domain followed by RhoGEF
(also called Dbl-homologous or DH) and Pleckstrin
Homology (PH) domains, and a C-terminal leucine-zipper
domain for dimerization. The SH3 domain of PIX binds to
an atypical PxxxPR motif in p21-activated kinases (PAKs)
with high affinity. The binding of PAKs to PIX
facilitate the localization of PAKs to focal complexes
and also localizes PAKs to PIX targets Cdc43 and Rac,
leading to the activation of PAKs. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 46.5 bits (110), Expect = 4e-07
Identities = 17/53 (32%), Positives = 29/53 (54%)
Query: 154 ECLVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ +V+A ++F EL +GD+I VT + WW G + + G FP+ Y+
Sbjct: 1 QLVVKARFNFKQTNEDELSVCKGDIIYVTRVEEGGWWEGTLNGKTGWFPSNYV 53
Score = 43.5 bits (102), Expect = 4e-06
Identities = 19/50 (38%), Positives = 29/50 (58%), Gaps = 1/50 (2%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A+ +F T EDELS K ++ + +E+ W+ L+GK G PSNY+
Sbjct: 6 ARFNFKQTNEDELSVCKGDIIYVTRVEEG-GWWEGTLNGKTGWFPSNYVR 54
>gnl|CDD|198261 cd10398, SH2_Tec_Txk, Src homology 2 (SH2) domain found in Tec
protein, Txk. A member of the Tec protein tyrosine
kinase Txk is expressed in thymus, spleen, lymph node, T
lymphocytes, NK cells, mast cell lines, and myeloid cell
line. Txk plays a role in TCR signal transduction, T
cell development, and selection which is analogous to
the function of Itk. Txk has been shown to interact with
IFN-gamma. Unlike most of the Tec family members Txk
lacks a PH domain. Instead Txk has a unique region
containing a palmitoylated cysteine string which has a
similar membrane tethering function as the PH domain.
Txk also has a zinc-binding motif, a SH3 domain, a SH2
domain, and a protein kinase catalytic domain. The TH
domain consists of a Zn2+-binding Btk motif and a
proline-rich region. The Btk motif is found in Tec
kinases, Ras GAP, and IGBP and crucial to the function
of the PH domain. It is not present in Txk which is not
surprising since it lacks a PH domain. The type 1 splice
form of the Drosophila homolog also lacks both the PH
domain and the Btk motif. The proline-rich regions are
highly conserved for the most part with the exception of
Bmx whose residues surrounding the PXXP motif are not
conserved (TH-like) and Btk29A which is entirely unique
with large numbers of glycine residues (TH-extended).
Tec family members all lack a C-terminal tyrosine having
an autoinhibitory function in its phosphorylated state.
In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 106
Score = 47.6 bits (113), Expect = 4e-07
Identities = 30/92 (32%), Positives = 53/92 (57%), Gaps = 15/92 (16%)
Query: 55 MKNHDWYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSD------GVQHF 107
++ ++WY+ ITR AERLL + EGAF++R S G +++SV ++H+
Sbjct: 3 LEIYEWYHKNITRNQAERLLRQESKEGAFIVRDS-RHLGSYTISVFTRARRSTEASIKHY 61
Query: 108 KVLRDSSGKFFLWVVK----FNSLNELVEYHR 135
++ ++ SG+ W V F S+ EL++YH+
Sbjct: 62 QIKKNDSGQ---WYVAERHLFQSIPELIQYHQ 90
Score = 47.6 bits (113), Expect = 4e-07
Identities = 30/92 (32%), Positives = 53/92 (57%), Gaps = 15/92 (16%)
Query: 234 MKNHDWYYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSD------GVQHF 286
++ ++WY+ ITR AERLL + EGAF++R S G +++SV ++H+
Sbjct: 3 LEIYEWYHKNITRNQAERLLRQESKEGAFIVRDS-RHLGSYTISVFTRARRSTEASIKHY 61
Query: 287 KVLRDSSGKFFLWVVK----FNSLNELVEYHR 314
++ ++ SG+ W V F S+ EL++YH+
Sbjct: 62 QIKKNDSGQ---WYVAERHLFQSIPELIQYHQ 90
>gnl|CDD|198211 cd10348, SH2_Cterm_shark_like, C-terminal Src homology 2 (SH2)
domain found in SH2 domains, ANK, and kinase domain
(shark) proteins. These non-receptor protein-tyrosine
kinases contain two SH2 domains, five ankyrin (ANK)-like
repeats, and a potential tyrosine phosphorylation site
in its carboxyl-terminal tail which resembles the
phosphorylation site in members of the src family. Like,
mammalian non-receptor protein-tyrosine kinases, ZAP-70
and syk proteins, they do not have SH3 domains. However,
the presence of ANK makes these unique among
protein-tyrosine kinases. Both tyrosine kinases and ANK
repeats have been shown to transduce developmental
signals, and SH2 domains are known to participate
intimately in tyrosine kinase signaling. These tyrosine
kinases are believed to be involved in epithelial cell
polarity. The members of this family include the shark
(SH2 domains, ANK, and kinase domain) gene in Drosophila
and yellow fever mosquitos, as well as the hydra protein
HTK16. Drosophila Shark is proposed to transduce
intracellularly the Crumbs, a protein necessary for
proper organization of ectodermal epithelia,
intercellular signal. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 86
Score = 47.0 bits (112), Expect = 4e-07
Identities = 23/84 (27%), Positives = 43/84 (51%), Gaps = 13/84 (15%)
Query: 59 DWYYGRITRADAERLLSNKH--EGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGK 116
W +G + R +A +L K +G+FL+R S PG + L++ + V HF++ ++ K
Sbjct: 1 QWLHGALDRNEAVEILKQKADADGSFLVRYSRRRPGGYVLTLVYENHVYHFEI-QNRDDK 59
Query: 117 FF------LWVVKFNSLNELVEYH 134
+F + SL L+E++
Sbjct: 60 WFYIDDGPYF----ESLEHLIEHY 79
Score = 47.0 bits (112), Expect = 4e-07
Identities = 23/84 (27%), Positives = 43/84 (51%), Gaps = 13/84 (15%)
Query: 238 DWYYGRITRADAERLLSNKH--EGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGK 295
W +G + R +A +L K +G+FL+R S PG + L++ + V HF++ ++ K
Sbjct: 1 QWLHGALDRNEAVEILKQKADADGSFLVRYSRRRPGGYVLTLVYENHVYHFEI-QNRDDK 59
Query: 296 FF------LWVVKFNSLNELVEYH 313
+F + SL L+E++
Sbjct: 60 WFYIDDGPYF----ESLEHLIEHY 79
>gnl|CDD|198277 cd10414, SH2_Grb14, Src homology 2 (SH2) domain found in the growth
factor receptor bound, subclass 14 (Grb14) proteins.
The Grb family binds to the epidermal growth factor
receptor (EGFR, erbB1) via their SH2 domains. Grb14 is
part of the Grb7 family of proteins which also includes
Grb7, and Grb14. They are composed of an N-terminal
Proline-rich domain, a Ras Associating-like (RA) domain,
a Pleckstrin Homology (PH) domain, a phosphotyrosine
interaction region (PIR, BPS) and a C-terminal SH2
domain. The SH2 domains of Grb7, Grb10 and Grb14
preferentially bind to a different RTK. Grb14 binds to
Fibroblast Growth Factor Receptor (FGFR) and weakly to
the erbB2 receptor. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 108
Score = 47.6 bits (113), Expect = 4e-07
Identities = 25/83 (30%), Positives = 51/83 (61%), Gaps = 7/83 (8%)
Query: 60 WYYGRITRADAERLLSNKH--EGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLR-DSSGK 116
W++ +I+R +A+RL+ + +G FL+R S+S+P F LS+ ++HF+++ + G+
Sbjct: 7 WFHHKISRDEAQRLIIQQGLVDGVFLVRDSQSNPRTFVLSMSHGQKIKHFQIIPVEDDGE 66
Query: 117 FFLWV----VKFNSLNELVEYHR 135
F + +F L +LVE+++
Sbjct: 67 LFHTLDDGHTRFTDLIQLVEFYQ 89
Score = 47.6 bits (113), Expect = 4e-07
Identities = 25/83 (30%), Positives = 51/83 (61%), Gaps = 7/83 (8%)
Query: 239 WYYGRITRADAERLLSNKH--EGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLR-DSSGK 295
W++ +I+R +A+RL+ + +G FL+R S+S+P F LS+ ++HF+++ + G+
Sbjct: 7 WFHHKISRDEAQRLIIQQGLVDGVFLVRDSQSNPRTFVLSMSHGQKIKHFQIIPVEDDGE 66
Query: 296 FFLWV----VKFNSLNELVEYHR 314
F + +F L +LVE+++
Sbjct: 67 LFHTLDDGHTRFTDLIQLVEFYQ 89
>gnl|CDD|212820 cd11887, SH3_Bbc1, Src Homology 3 domain of Bbc1 and similar
domains. This subfamily is composed of Saccharomyces
cerevisiae Bbc1p, also called Mti1p (Myosin tail
region-interacting protein), and similar proteins. Bbc1p
interacts with and regulates type I myosins in yeast,
Myo3p and Myo5p, which are involved in actin
cytoskeletal reorganization. It also binds and inhibits
Las17, a WASp family protein that functions as an
activator of the Arp2/3 complex. Bbc1p contains an
N-terminal SH3 domain. SH3 domains bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs; they play a role in the
regulation of enzymes by intramolecular interactions,
changing the subcellular localization of signal pathway
components and mediate multiprotein complex assemblies.
Length = 60
Score = 46.2 bits (110), Expect = 4e-07
Identities = 20/56 (35%), Positives = 29/56 (51%), Gaps = 5/56 (8%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGE----IGARK-GLFPATYI 206
V+ALY + +L F G +ITVT+ D W+ GE G K G+FP ++
Sbjct: 3 KVKALYPYESDHEDDLNFDVGQLITVTEEEDADWYFGEYVDSNGNTKEGIFPKNFV 58
Score = 36.9 bits (86), Expect = 8e-04
Identities = 17/56 (30%), Positives = 29/56 (51%), Gaps = 6/56 (10%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDG-----KEGLIPSNYIE 54
A + + + ED+L+F Q++ + ED +WY E KEG+ P N++E
Sbjct: 5 KALYPYESDHEDDLNFDVGQLITVTEEEDA-DWYFGEYVDSNGNTKEGIFPKNFVE 59
>gnl|CDD|212988 cd12055, SH3_CIN85_2, Second Src Homology 3 domain (SH3B) of
Cbl-interacting protein of 85 kDa. CIN85, also called
SH3 domain-containing kinase-binding protein 1 (SH3KBP1)
or CD2-binding protein 3 (CD2BP3) or Ruk, is an adaptor
protein that is involved in the downregulation of
receptor tyrosine kinases by facilitating endocytosis
through interaction with endophilin-associated ubiquitin
ligase Cbl proteins. It is also important in many other
cellular processes including vesicle-mediated transport,
cytoskeletal remodelling, apoptosis, cell adhesion and
migration, and viral infection, among others. CIN85
exists as multiple variants from alternative splicing;
the main variant contains three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CIN85 to bind
various protein partners and assemble complexes that
have been implicated in many different functions. This
alignment model represents the second SH3 domain (SH3B)
of CIN85. SH3B has been shown to bind Cbl proline-rich
peptides and ubiquitin. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 46.1 bits (109), Expect = 5e-07
Identities = 17/49 (34%), Positives = 28/49 (57%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
Q + + PQ ELE + GD+I V ++ WW G + + G+FP+ +I
Sbjct: 3 QVAFSYLPQNEDELELKVGDIIEVVGEVEEGWWEGVLNGKTGMFPSNFI 51
Score = 33.8 bits (77), Expect = 0.009
Identities = 14/41 (34%), Positives = 26/41 (63%), Gaps = 1/41 (2%)
Query: 14 EDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
EDEL + +++++ E + W+ L+GK G+ PSN+I+
Sbjct: 13 EDELELKVGDIIEVVG-EVEEGWWEGVLNGKTGMFPSNFIK 52
>gnl|CDD|212908 cd11975, SH3_ARHGEF9, Src homology 3 domain of the Rho guanine
nucleotide exchange factor ARHGEF9. ARHGEF9, also
called PEM2 or collybistin, selectively activates Cdc42
by exchanging bound GDP for free GTP. It is highly
expressed in the brain and it interacts with gephyrin, a
postsynaptic protein associated with GABA and glycine
receptors. Mutations in the ARHGEF9 gene cause X-linked
mental retardation with associated features like
seizures, hyper-anxiety, aggressive behavior, and
sensory hyperarousal. ARHGEF9 contains a SH3 domain
followed by RhoGEF (also called Dbl-homologous or DH)
and Pleckstrin Homology (PH) domains. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 62
Score = 45.9 bits (108), Expect = 6e-07
Identities = 20/49 (40%), Positives = 31/49 (63%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+A++D EL F+ GDVI V D S++ WW G+I +G FPA+++
Sbjct: 8 EAVWDHVTMANRELAFKAGDVIKVLDASNKDWWWGQIDDEEGWFPASFV 56
Score = 31.6 bits (71), Expect = 0.079
Identities = 15/55 (27%), Positives = 32/55 (58%), Gaps = 1/55 (1%)
Query: 1 MEAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
+ A A D A EL+F+ V+K+L+ + +W+ ++D +EG P++++ +
Sbjct: 5 VSAEAVWDHVTMANRELAFKAGDVIKVLDASNK-DWWWGQIDDEEGWFPASFVRL 58
>gnl|CDD|212905 cd11972, SH3_Abi2, Src homology 3 domain of Abl Interactor 2.
Abi2 is highly expressed in the brain and eye. It
regulates actin cytoskeletal reorganization at adherens
junctions and dendritic spines, which is important in
cell morphogenesis, migration, and cognitive function.
Mice deficient with Abi2 show defects in orientation
and migration of lens fibers, neuronal migration,
dendritic spine morphology, as well as deficits in
learning and memory. Abi proteins are adaptor proteins
serving as binding partners and substrates of Abl
tyrosine kinases. They are involved in regulating actin
cytoskeletal reorganization and play important roles in
membrane-ruffling, endocytosis, cell motility, and cell
migration. Abi proteins contain a homeobox homology
domain, a proline-rich region, and a SH3 domain. The
SH3 domain of Abi binds to a PxxP motif in Abl. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 61
Score = 45.8 bits (108), Expect = 6e-07
Identities = 20/57 (35%), Positives = 33/57 (57%), Gaps = 1/57 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEMKNH 58
+ +A +D+ EDELSF++ ++ ++ DD WY ++G GL P NY+E H
Sbjct: 4 KVVAIYDYTKDKEDELSFQEGAIIYVIKKNDD-GWYEGVMNGVTGLFPGNYVESIMH 59
Score = 45.0 bits (106), Expect = 1e-06
Identities = 19/50 (38%), Positives = 29/50 (58%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V A+YD+T + EL F+ G +I V ++D W+ G + GLFP Y+
Sbjct: 5 VVAIYDYTKDKEDELSFQEGAIIYVIKKNDDGWYEGVMNGVTGLFPGNYV 54
>gnl|CDD|212898 cd11965, SH3_ASAP1, Src homology 3 domain of ArfGAP with SH3
domain, ankyrin repeat and PH domain containing protein
1. ASAP1 is also called DDEF1 (Development and
Differentiation Enhancing Factor 1), AMAP1, centaurin
beta-4, or PAG2. an Arf GTPase activating protein (GAP)
with activity towards Arf1 and Arf5 but not Arf6.
However, it has been shown to bind GTP-Arf6 stably
without GAP activity. It has been implicated in cell
growth, migration, and survival, as well as in tumor
invasion and malignancy. It binds paxillin and
cortactin, two components of invadopodia which are
essential for tumor invasiveness. It also binds focal
adhesion kinase (FAK) and the SH2/SH3 adaptor CrkL.
ASAP1 contains an N-terminal BAR domain, followed by a
Pleckstrin homology (PH) domain, an Arf GAP domain,
ankyrin (ANK) repeats, and a C-terminal SH3 domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 45.8 bits (108), Expect = 6e-07
Identities = 22/53 (41%), Positives = 29/53 (54%), Gaps = 3/53 (5%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGA---RKGLFPATYI 206
V+ +YD EL F G+VI VT DQ WW G I RKG+FP +++
Sbjct: 2 VKTIYDCQADNDDELTFVEGEVIIVTGEEDQEWWIGHIEGQPERKGVFPVSFV 54
Score = 29.6 bits (66), Expect = 0.29
Identities = 14/52 (26%), Positives = 32/52 (61%), Gaps = 4/52 (7%)
Query: 7 HDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDG---KEGLIPSNYIEM 55
+D A +DEL+F + +V+ I+ E+D W+ ++G ++G+ P +++ +
Sbjct: 6 YDCQADNDDELTFVEGEVI-IVTGEEDQEWWIGHIEGQPERKGVFPVSFVHI 56
>gnl|CDD|212773 cd11839, SH3_Intersectin_4, Fourth Src homology 3 domain (or SH3D)
of Intersectin. Intersectins (ITSNs) are adaptor
proteins that function in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction.
They are essential for initiating clathrin-coated pit
formation. They bind to many proteins through their
multidomain structure and facilitate the assembly of
multimeric complexes. Vertebrates contain two ITSN
proteins, ITSN1 and ITSN2, which exist in alternatively
spliced short and long isoforms. The short isoforms
contain two Eps15 homology domains (EH1 and EH2), a
coiled-coil region and five SH3 domains (SH3A-E), while
the long isoforms, in addition, contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin homology (PH)
and C2 domains. ITSN1 and ITSN2 are both widely
expressed, with variations depending on tissue type and
stage of development. The fourth SH3 domain (or SH3D) of
ITSN1 has been shown to bind SHIP2, Numb, CdGAP, and
N-WASP. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 45.8 bits (109), Expect = 7e-07
Identities = 18/56 (32%), Positives = 26/56 (46%), Gaps = 5/56 (8%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGAR-----KGLFPATYI 206
+ Q + FT +L G ++ V +S WW GE+ AR G FPA Y+
Sbjct: 1 IAQVIAPFTATAENQLSLAVGQLVLVRKKSPSGWWEGELQARGKKRQIGWFPANYV 56
Score = 35.0 bits (81), Expect = 0.004
Identities = 15/54 (27%), Positives = 26/54 (48%), Gaps = 6/54 (11%)
Query: 7 HDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKE-----GLIPSNYIEM 55
F ATAE++LS Q++ + W+ EL + G P+NY+++
Sbjct: 6 APFTATAENQLSLAVGQLVLVRKKSPS-GWWEGELQARGKKRQIGWFPANYVKL 58
>gnl|CDD|212922 cd11989, SH3_Intersectin1_2, Second Src homology 3 domain (or SH3B)
of Intersectin-1. Intersectin-1 (ITSN1) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN1 localizes in membranous organelles, CCPs, the
Golgi complex, and may be involved in the cell membrane
trafficking system. It exists in alternatively spliced
short and long isoforms. The short isoform contains two
Eps15 homology domains (EH1 and EH2), a coiled-coil
region and five SH3 domains (SH3A-E), while the long
isoform, in addition, contains RhoGEF (also called
Dbl-homologous or DH), Pleckstrin homology (PH) and C2
domains. The second SH3 domain (or SH3B) of ITSN1 has
been shown to bind WNK and CdGAP. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 52
Score = 45.5 bits (107), Expect = 7e-07
Identities = 21/49 (42%), Positives = 31/49 (63%), Gaps = 1/49 (2%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
QALY + ++ L F + DVITV ++ D WW GE+ +KG FP +Y+
Sbjct: 3 QALYPWRAKKDNHLNFNKNDVITVLEQQDM-WWFGEVQGQKGWFPKSYV 50
Score = 32.8 bits (74), Expect = 0.020
Identities = 15/54 (27%), Positives = 33/54 (61%), Gaps = 2/54 (3%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
+A A + + A ++ L+F K+ V+ +L +D W+ E+ G++G P +Y+++
Sbjct: 1 QAQALYPWRAKKDNHLNFNKNDVITVLEQQD--MWWFGEVQGQKGWFPKSYVKL 52
>gnl|CDD|212849 cd11916, SH3_Sorbs1_3, Third (or C-terminal) Src Homology 3 domain
of Sorbin and SH3 domain containing 1 (Sorbs1), also
called ponsin. Sorbs1 is also called ponsin, SH3P12, or
CAP (c-Cbl associated protein). It is an adaptor protein
containing one sorbin homology (SoHo) and three SH3
domains. It binds Cbl and plays a major role in
regulating the insulin signaling pathway by enhancing
insulin-induced phosphorylation of Cbl. Sorbs1, like
vinexin, localizes at cell-ECM and cell-cell adhesion
sites where it binds vinculin, paxillin, and afadin. It
may function in the control of cell motility. Other
interaction partners of Sorbs1 include c-Abl, Sos,
flotillin, Grb4, ataxin-7, filamin C, among others. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 45.4 bits (107), Expect = 8e-07
Identities = 21/51 (41%), Positives = 28/51 (54%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARK--GLFPATYI 206
QALY + PQ ELE R GD++ V ++ D W+ G K G FP Y+
Sbjct: 5 QALYSYAPQNDDELELRDGDIVDVMEKCDDGWFVGTSRRTKQFGTFPGNYV 55
Score = 26.5 bits (58), Expect = 4.3
Identities = 10/17 (58%), Positives = 11/17 (64%)
Query: 337 QALYDFTPQEPGELEFR 353
QALY + PQ ELE R
Sbjct: 5 QALYSYAPQNDDELELR 21
>gnl|CDD|212990 cd12057, SH3_CIN85_3, Third Src Homology 3 domain (SH3C) of
Cbl-interacting protein of 85 kDa. CIN85, also called
SH3 domain-containing kinase-binding protein 1 (SH3KBP1)
or CD2-binding protein 3 (CD2BP3) or Ruk, is an adaptor
protein that is involved in the downregulation of
receptor tyrosine kinases by facilitating endocytosis
through interaction with endophilin-associated ubiquitin
ligase Cbl proteins. It is also important in many other
cellular processes including vesicle-mediated transport,
cytoskeletal remodelling, apoptosis, cell adhesion and
migration, and viral infection, among others. CIN85
exists as multiple variants from alternative splicing;
the main variant contains three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CIN85 to bind
various protein partners and assemble complexes that
have been implicated in many different functions. This
alignment model represents the third SH3 domain (SH3C)
of CIN85. SH3C has been shown to bind ubiquitin. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 56
Score = 45.3 bits (107), Expect = 8e-07
Identities = 16/51 (31%), Positives = 29/51 (56%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRS--DQHWWHGEIGARKGLFPATYI 206
+ L+ + Q EL + GD++T+ + D WW GE+ R+G+FP ++
Sbjct: 3 KVLFPYEAQNEDELTIKEGDIVTLISKDCIDAGWWEGELNGRRGVFPDNFV 53
Score = 41.0 bits (96), Expect = 3e-05
Identities = 13/48 (27%), Positives = 31/48 (64%), Gaps = 1/48 (2%)
Query: 9 FNATAEDELSFRKSQVLKILNME-DDMNWYRAELDGKEGLIPSNYIEM 55
+ A EDEL+ ++ ++ +++ + D W+ EL+G+ G+ P N++++
Sbjct: 8 YEAQNEDELTIKEGDIVTLISKDCIDAGWWEGELNGRRGVFPDNFVKL 55
>gnl|CDD|212802 cd11869, SH3_p40phox, Src Homology 3 domain of the p40phox subunit
of NADPH oxidase. p40phox, also called Neutrophil
cytosol factor 4 (NCF-4), is a cytosolic subunit of the
phagocytic NADPH oxidase complex (also called Nox2 or
gp91phox) which plays a crucial role in the cellular
response to bacterial infection. NADPH oxidase catalyzes
the transfer of electrons from NADPH to oxygen during
phagocytosis forming superoxide and reactive oxygen
species. p40phox positively regulates NADPH oxidase in
both phosphatidylinositol-3-phosphate (PI3P)-dependent
and PI3P-independent manner. It contains an N-terminal
PX domain, a central SH3 domain, and a C-terminal PB1
domain that interacts with p67phox. The SH3 domain of
p40phox binds to canonical polyproline and noncanonical
motifs at the C-terminus of p47phox. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 54
Score = 45.2 bits (107), Expect = 9e-07
Identities = 18/49 (36%), Positives = 29/49 (59%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+AL+DFT EL F+ GDVI + R ++ W G + G+FP +++
Sbjct: 3 EALFDFTGNSKLELNFKAGDVIFLLSRVNKDWLEGTVRGATGIFPLSFV 51
Score = 26.7 bits (59), Expect = 3.1
Identities = 13/53 (24%), Positives = 29/53 (54%), Gaps = 1/53 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
A A DF ++ EL+F+ V+ +L+ + +W + G G+ P +++++
Sbjct: 2 AEALFDFTGNSKLELNFKAGDVIFLLS-RVNKDWLEGTVRGATGIFPLSFVKI 53
>gnl|CDD|212934 cd12001, SH3_BCAR1, Src homology 3 domain of the CAS
(Crk-Associated Substrate) scaffolding protein family
member, Breast Cancer Anti-estrogen Resistance 1.
BCAR1, also called p130cas or CASS1, is the founding
member of the CAS family of scaffolding proteins and was
originally identified through its ability to associate
with Crk. The name BCAR1 was designated because the
human gene was identified in a screen for genes that
promote resistance to tamoxifen. It is widely expressed
and its deletion is lethal in mice. It plays a role in
regulating cell motility, survival, proliferation,
transformation, cancer progression, and bacterial
pathogenesis. CAS proteins function as molecular
scaffolds to regulate protein complexes that are
involved in many cellular processes. They share a common
domain structure that includes an N-terminal SH3 domain,
an unstructured substrate domain that contains many YxxP
motifs, a serine-rich four-helix bundle, and a FAT-like
C-terminal domain. The SH3 domain of CAS proteins binds
to diverse partners including FAK, FRNK, Pyk2, PTP-PEST,
DOCK180, among others. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 68
Score = 45.4 bits (107), Expect = 9e-07
Identities = 21/51 (41%), Positives = 30/51 (58%), Gaps = 3/51 (5%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQ---HWWHGEIGARKGLFPA 203
L +ALYD + P EL FR+GD++TV +R Q WW + R+G+ P
Sbjct: 4 LAKALYDNVAESPDELSFRKGDIMTVLERDTQGLDGWWLCSLHGRQGIVPG 54
Score = 38.1 bits (88), Expect = 5e-04
Identities = 18/55 (32%), Positives = 32/55 (58%), Gaps = 2/55 (3%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDM--NWYRAELDGKEGLIPSNYIEM 55
A A +D A + DELSFRK ++ +L + W+ L G++G++P N +++
Sbjct: 5 AKALYDNVAESPDELSFRKGDIMTVLERDTQGLDGWWLCSLHGRQGIVPGNRLKI 59
>gnl|CDD|213017 cd12141, SH3_DNMBP_C2, Second C-terminal Src homology 3 domain of
Dynamin Binding Protein, also called Tuba, and similar
domains. DNMBP or Tuba is a cdc42-specific guanine
nucleotide exchange factor (GEF) that contains four
N-terminal SH3 domains, a central RhoGEF [or Dbl
homology (DH)] domain followed by a Bin/Amphiphysin/Rvs
(BAR) domain, and two C-terminal SH3 domains. It
provides a functional link between dynamin, Rho GTPase
signaling, and actin dynamics. It plays an important
role in regulating cell junction configuration. The
C-terminal SH3 domains of DNMBP bind to N-WASP and
Ena/VASP proteins, which are key regulatory proteins of
the actin cytoskeleton. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 57
Score = 45.2 bits (107), Expect = 9e-07
Identities = 20/52 (38%), Positives = 32/52 (61%), Gaps = 3/52 (5%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMED---DMNWYRAELDGKEGLIPSNYI 53
A + F A + +ELS +Q ++IL D + W+ AE +G++G +PSNYI
Sbjct: 4 AVYTFKARSPNELSVSANQRVRILEFSDLTGNKEWWLAEANGQKGYVPSNYI 55
Score = 32.5 bits (74), Expect = 0.033
Identities = 16/52 (30%), Positives = 27/52 (51%), Gaps = 4/52 (7%)
Query: 159 ALYDFTPQEPGEL---EFRRGDVITVTDRS-DQHWWHGEIGARKGLFPATYI 206
A+Y F + P EL +R ++ +D + ++ WW E +KG P+ YI
Sbjct: 4 AVYTFKARSPNELSVSANQRVRILEFSDLTGNKEWWLAEANGQKGYVPSNYI 55
Score = 31.3 bits (71), Expect = 0.075
Identities = 13/30 (43%), Positives = 19/30 (63%), Gaps = 3/30 (10%)
Query: 206 ILNMED---DMNWYRAELDGKEGLIPSNYI 232
IL D + W+ AE +G++G +PSNYI
Sbjct: 26 ILEFSDLTGNKEWWLAEANGQKGYVPSNYI 55
>gnl|CDD|198220 cd10357, SH2_ShkD_ShkE, Src homology 2 (SH2) domain found in SH2
domain-bearing protein kinases D and E (ShkD and ShkE).
SH2-bearing genes cloned from Dictyostelium include two
transcription factors, STATa and STATc, and a signaling
factor, SHK1 (shkA). A database search of the
Dictyostelium discoideum genome revealed two additional
putative STAT sequences, dd-STATb and dd-STATd, and four
additional putative SHK genes, dd-SHK2 (shkB), dd-SHK3
(shkC), dd-SHK4 (shkD), and dd-SHK5 (shkE). This model
contains members of shkD and shkE. All of the SHK
members are most closely related to the protein kinases
found in plants. However these kinases in plants are
not conjugated to any SH2 or SH2-like sequences.
Alignment data indicates that the SHK SH2 domains carry
some features of the STAT SH2 domains in Dictyostelium.
When STATc's linker domain was used for a BLAST search,
the sequence between the protein kinase domain and the
SH2 domain (the linker) of SHK was recovered, suggesting
a close relationship among these molecules within this
region. SHK's linker domain is predicted to contain an
alpha-helix which is indeed homologous to that of STAT.
Based on the phylogenetic alignment, SH2 domains can be
grouped into two categories, STAT-type and Src-type. SHK
family members are in between, but are closer to the
STAT-type which indicates a close relationship between
SHK and STAT families in their SH2 domains and further
supports the notion that SHKs linker-SH2 domain evolved
from STAT or STATL (STAT-like Linker-SH2) domain found
in plants. In SHK, STAT, and SPT6, the linker-SH2
domains all reside exclusively in the C-terminal
regions. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 87
Score = 46.0 bits (109), Expect = 1e-06
Identities = 20/55 (36%), Positives = 32/55 (58%), Gaps = 2/55 (3%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGD--FSLSVKCSDGVQHFKVLRD 112
W++G I+R +AE+ L + EG FLIR+S + P F++S K H ++ R
Sbjct: 12 WFHGDISRDEAEKRLRGRPEGTFLIRLSSTDPKKTPFTISKKKKSKPVHKRISRI 66
Score = 46.0 bits (109), Expect = 1e-06
Identities = 20/55 (36%), Positives = 32/55 (58%), Gaps = 2/55 (3%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGD--FSLSVKCSDGVQHFKVLRD 291
W++G I+R +AE+ L + EG FLIR+S + P F++S K H ++ R
Sbjct: 12 WFHGDISRDEAEKRLRGRPEGTFLIRLSSTDPKKTPFTISKKKKSKPVHKRISRI 66
>gnl|CDD|212850 cd11917, SH3_Sorbs2_3, Third (or C-terminal) Src Homology 3 domain
of Sorbin and SH3 domain containing 2 (Sorbs2), also
called Arg-binding protein 2 (ArgBP2). Sorbs2 or ArgBP2
is an adaptor protein containing one sorbin homology
(SoHo) and three SH3 domains. It regulates
actin-dependent processes including cell adhesion,
morphology, and migration. It is expressed in many
tissues and is abundant in the heart. Like vinexin, it
is found in focal adhesion where it interacts with
vinculin and afadin. It also localizes in epithelial
cell stress fibers and in cardiac muscle cell Z-discs.
Sorbs2 has been implicated to play roles in the
signaling of c-Arg, Akt, and Pyk2. Other interaction
partners of Sorbs2 include c-Abl, flotillin, spectrin,
dynamin 1/2, synaptojanin, PTP-PEST, among others. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 61
Score = 45.4 bits (107), Expect = 1e-06
Identities = 22/51 (43%), Positives = 29/51 (56%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARK--GLFPATYI 206
QALY++ P+ ELE R GDVI V ++ D W+ G K G FP Y+
Sbjct: 8 QALYNYMPRNEDELELREGDVIDVMEKCDDGWFVGTSRRTKFFGTFPGNYV 58
>gnl|CDD|212907 cd11974, SH3_ASEF2, Src homology 3 domain of APC-Stimulated guanine
nucleotide Exchange Factor 2. ASEF2, also called
Spermatogenesis-associated protein 13 (SPATA13), is a
GEF that localizes with actin at the leading edge of
cells and is important in cell migration and adhesion
dynamics. GEFs activate small GTPases by exchanging
bound GDP for free GTP. ASEF2 can activate both Rac 1
and Cdc42, but only Rac1 activation is necessary for
increased cell migration and adhesion turnover. Together
with APC (adenomatous polyposis coli) and Neurabin2, a
scaffold protein that binds F-actin, it is involved in
regulating HGF-induced cell migration. ASEF2 contains a
SH3 domain followed by RhoGEF (also called
Dbl-homologous or DH) and Pleckstrin Homology (PH)
domains. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 45.1 bits (106), Expect = 1e-06
Identities = 19/49 (38%), Positives = 30/49 (61%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+AL+D + EL F+ GDVI V + S++ WW G R+ FPA+++
Sbjct: 4 EALWDHVTMDDQELAFKAGDVIRVLEASNKDWWWGRNEDREAWFPASFV 52
>gnl|CDD|212811 cd11878, SH3_Bem1p_1, First Src Homology 3 domain of Bud emergence
protein 1 and similar domains. Members of this
subfamily bear similarity to Saccharomyces cerevisiae
Bem1p, containing two Src Homology 3 (SH3) domains at
the N-terminus, a central PX domain, and a C-terminal
PB1 domain. Bem1p is a scaffolding protein that is
critical for proper Cdc42p activation during bud
formation in yeast. During budding and mating, Bem1p
migrates to the plasma membrane where it can serve as an
adaptor for Cdc42p and some other proteins. Bem1p also
functions as an effector of the G1 cyclin Cln3p and the
cyclin-dependent kinase Cdc28p in promoting vacuolar
fusion. SH3 domains bind to proline-rich ligands with
moderate affinity and selectivity, preferentially to
PxxP motifs; they play a role in the regulation of
enzymes by intramolecular interactions, changing the
subcellular localization of signal pathway components
and mediate multiprotein complex assemblies.
Length = 54
Score = 45.0 bits (107), Expect = 1e-06
Identities = 20/52 (38%), Positives = 28/52 (53%), Gaps = 3/52 (5%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWW---HGEIGARKGLFPATY 205
++ALYD+ Q PGEL F +GD V DQ W + ++GL P +Y
Sbjct: 2 IRALYDYRAQTPGELSFSKGDFFHVIGEEDQGEWYEATNPVTGKRGLVPKSY 53
Score = 42.7 bits (101), Expect = 6e-06
Identities = 19/50 (38%), Positives = 26/50 (52%), Gaps = 2/50 (4%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAE--LDGKEGLIPSNY 52
A +D+ A ELSF K ++ ED WY A + GK GL+P +Y
Sbjct: 4 ALYDYRAQTPGELSFSKGDFFHVIGEEDQGEWYEATNPVTGKRGLVPKSY 53
Score = 26.9 bits (60), Expect = 2.7
Identities = 10/19 (52%), Positives = 14/19 (73%)
Query: 336 VQALYDFTPQEPGELEFRR 354
++ALYD+ Q PGEL F +
Sbjct: 2 IRALYDYRAQTPGELSFSK 20
>gnl|CDD|212911 cd11978, SH3_VAV3_2, C-terminal (or second) Src homology 3 domain
of VAV3 protein. VAV3 is ubiquitously expressed and
functions as a phosphorylation-dependent guanine
nucleotide exchange factor (GEF) for RhoA, RhoG, and
Rac1. It has been implicated to function in the
hematopoietic, bone, cerebellar, and cardiovascular
systems. VAV3 is essential in axon guidance in neurons
that control blood pressure and respiration. It is
overexpressed in prostate cancer cells and it plays a
role in regulating androgen receptor transcriptional
activity. VAV proteins contain several domains that
enable their function: N-terminal calponin homology
(CH), acidic, RhoGEF (also called Dbl-homologous or
DH), Pleckstrin Homology (PH), C1 (zinc finger), SH2,
and two SH3 domains. The SH3 domain of VAV is involved
in the localization of proteins to specific sites
within the cell, by interacting with proline-rich
sequences within target proteins. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 45.0 bits (106), Expect = 1e-06
Identities = 22/52 (42%), Positives = 30/52 (57%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
AIA++DF A ELS K V+KI W+R E++G+ G PS Y+E
Sbjct: 3 AIARYDFCARDMRELSLLKGDVVKIYTKMSTNGWWRGEVNGRVGWFPSTYVE 54
Score = 44.6 bits (105), Expect = 1e-06
Identities = 21/49 (42%), Positives = 29/49 (59%), Gaps = 1/49 (2%)
Query: 159 ALYDFTPQEPGELEFRRGDVITV-TDRSDQHWWHGEIGARKGLFPATYI 206
A YDF ++ EL +GDV+ + T S WW GE+ R G FP+TY+
Sbjct: 5 ARYDFCARDMRELSLLKGDVVKIYTKMSTNGWWRGEVNGRVGWFPSTYV 53
>gnl|CDD|212854 cd11921, SH3_Vinexin_1, First Src Homology 3 domain of Vinexin,
also called Sorbin and SH3 domain containing 3 (Sorbs3).
Vinexin is also called Sorbs3, SH3P3, and
SH3-containing adapter molecule 1 (SCAM-1). It is an
adaptor protein containing one sorbin homology (SoHo)
and three SH3 domains. Vinexin was first identified as a
vinculin binding protein; it is co-localized with
vinculin at cell-ECM and cell-cell adhesion sites. There
are several splice variants of vinexin: alpha, which
contains the SoHo and three SH3 domains and displays
tissue-specific expression; and beta, which contains
only the three SH3 domains and is widely expressed.
Vinexin alpha stimulates the accumulation of F-actin at
focal contact sites. Vinexin also promotes keratinocyte
migration and wound healing. The SH3 domains of vinexin
have been reported to bind a number of ligands including
vinculin, WAVE2, DLG5, Abl, and Cbl. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 44.9 bits (106), Expect = 1e-06
Identities = 18/46 (39%), Positives = 28/46 (60%)
Query: 161 YDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+DF Q P EL ++GD++ + D++W GE R G+FPA Y+
Sbjct: 7 FDFQAQSPKELTLQKGDIVYIHKEVDKNWLEGEHHGRVGIFPANYV 52
Score = 40.3 bits (94), Expect = 4e-05
Identities = 20/53 (37%), Positives = 31/53 (58%), Gaps = 1/53 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
A K DF A + EL+ +K ++ I + E D NW E G+ G+ P+NY+E+
Sbjct: 3 ARLKFDFQAQSPKELTLQKGDIVYI-HKEVDKNWLEGEHHGRVGIFPANYVEV 54
>gnl|CDD|212734 cd11800, SH3_DNMBP_C2_like, Second C-terminal Src homology 3 domain
of Dynamin Binding Protein, also called Tuba, and
similar domains. DNMBP or Tuba is a cdc42-specific
guanine nucleotide exchange factor (GEF) that contains
four N-terminal SH3 domains, a central RhoGEF [or Dbl
homology (DH)] domain followed by a Bin/Amphiphysin/Rvs
(BAR) domain, and two C-terminal SH3 domains. It
provides a functional link between dynamin, Rho GTPase
signaling, and actin dynamics. It plays an important
role in regulating cell junction configuration. The
C-terminal SH3 domains of DNMBP bind to N-WASP and
Ena/VASP proteins, which are key regulatory proteins of
the actin cytoskeleton. Also included in this subfamily
is the second C-terminal SH3 domain of Rho guanine
nucleotide exchange factor 37 (ARHGEF37), whose function
is still unknown. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 44.7 bits (106), Expect = 1e-06
Identities = 19/52 (36%), Positives = 27/52 (51%), Gaps = 4/52 (7%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQH----WWHGEIGARKGLFPATYI 206
ALY F + PGEL G V+TV ++ D WW E ++G P+ Y+
Sbjct: 4 ALYTFEARSPGELSVTEGQVVTVLEKHDLKGNPEWWLVEDRGKQGYVPSNYL 55
Score = 44.7 bits (106), Expect = 1e-06
Identities = 19/53 (35%), Positives = 28/53 (52%), Gaps = 3/53 (5%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMN---WYRAELDGKEGLIPSNYI 53
A + F A + ELS + QV+ +L D W+ E GK+G +PSNY+
Sbjct: 3 YALYTFEARSPGELSVTEGQVVTVLEKHDLKGNPEWWLVEDRGKQGYVPSNYL 55
>gnl|CDD|198209 cd10346, SH2_SH2B_family, Src homology 2 (SH2) domain found in SH2B
adapter protein family. The SH2B adapter protein family
has 3 members: SH2B1 (SH2-B, PSM), SH2B2 (APS), and
SH2B3 (Lnk). SH2B family members contain a pleckstrin
homology domain, at least one dimerization domain, and a
C-terminal SH2 domain which binds to phosphorylated
tyrosines in a variety of tyrosine kinases. SH2B1 and
SH2B2 function in signaling pathways found downstream
of growth hormone receptor and receptor tyrosine
kinases, including the insulin, insulin-like growth
factor-I (IGF-I), platelet-derived growth factor (PDGF),
nerve growth factor, hepatocyte growth factor, and
fibroblast growth factor receptors. SH2B2beta, a new
isoform of SH2B2, is an endogenous inhibitor of SH2B1
and/or SH2B2 (SH2B2alpha), negatively regulating insulin
signaling and/or JAK2-mediated cellular responses. SH2B3
negatively regulates lymphopoiesis and early
hematopoiesis. The lnk-deficiency results in enhanced
production of B cells, and expansion as well as enhanced
function of hematopoietic stem cells (HSCs),
demonstrating negative regulatory functions of Sh2b3/Lnk
in cytokine signaling. Sh2b3/Lnk also functions in
responses controlled by cell adhesion and in crosstalk
between integrin- and cytokine-mediated signaling. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 97
Score = 45.9 bits (109), Expect = 1e-06
Identities = 23/87 (26%), Positives = 50/87 (57%), Gaps = 5/87 (5%)
Query: 54 EMKNHDWYYGRITRADAERLL----SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKV 109
E+ + W++G ++R+DA +L+ ++ H G FL+R SE+ G+F L+ +H ++
Sbjct: 4 ELSEYPWFHGTLSRSDAAQLVLHSGADGH-GVFLVRQSETRRGEFVLTFNFQGRAKHLRL 62
Query: 110 LRDSSGKFFLWVVKFNSLNELVEYHRT 136
+ G+ + + F S+ +++E+ R
Sbjct: 63 TLNEKGQCRVQHLWFPSIFDMLEHFRQ 89
Score = 45.9 bits (109), Expect = 1e-06
Identities = 23/87 (26%), Positives = 50/87 (57%), Gaps = 5/87 (5%)
Query: 233 EMKNHDWYYGRITRADAERLL----SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKV 288
E+ + W++G ++R+DA +L+ ++ H G FL+R SE+ G+F L+ +H ++
Sbjct: 4 ELSEYPWFHGTLSRSDAAQLVLHSGADGH-GVFLVRQSETRRGEFVLTFNFQGRAKHLRL 62
Query: 289 LRDSSGKFFLWVVKFNSLNELVEYHRT 315
+ G+ + + F S+ +++E+ R
Sbjct: 63 TLNEKGQCRVQHLWFPSIFDMLEHFRQ 89
>gnl|CDD|198259 cd10396, SH2_Tec_Itk, Src homology 2 (SH2) domain found in Tec
protein, IL2-inducible T-cell kinase (Itk). A member of
the Tec protein tyrosine kinase Itk is expressed thymus,
spleen, lymph node, T lymphocytes, NK and mast cells. It
plays a role in T-cell proliferation and
differentiation, analogous to Tec family kinases Txk.
Itk has been shown to interact with Fyn,
Wiskott-Aldrich syndrome protein, KHDRBS1, PLCG1,
Lymphocyte cytosolic protein 2, Linker of activated T
cells, Karyopherin alpha 2, Grb2, and Peptidylprolyl
isomerase A. Most of the Tec family members have a PH
domain (Txk and the short (type 1) splice variant of
Drosophila Btk29A are exceptions), a Tec homology (TH)
domain, a SH3 domain, a SH2 domain, and a protein kinase
catalytic domain. The TH domain consists of a
Zn2+-binding Btk motif and a proline-rich region. The
Btk motif is found in Tec kinases, Ras GAP, and IGBP. It
is crucial for the function of Tec PH domains and it's
lack of presence in Txk is not surprising since it lacks
a PH domain. The type 1 splice form of the Drosophila
homolog also lacks both the PH domain and the Btk motif.
The proline-rich regions are highly conserved for the
most part with the exception of Bmx whose residues
surrounding the PXXP motif are not conserved (TH-like)
and Btk29A which is entirely unique with large numbers
of glycine residues (TH-extended). Tec family members
all lack a C-terminal tyrosine having an autoinhibitory
function in its phosphorylated state. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 108
Score = 45.9 bits (109), Expect = 2e-06
Identities = 33/89 (37%), Positives = 49/89 (55%), Gaps = 13/89 (14%)
Query: 58 HDWYYGRITRADAERLL-SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQ--------HFK 108
++WY I R+ AE+LL EG F++R S S PG +++S+ G + H K
Sbjct: 6 YEWYNKNINRSKAEKLLRDEGKEGGFMVRDS-SQPGLYTVSLYTKAGGEGNPCIRHYHIK 64
Query: 109 VLRDSSGKFFLWVVK--FNSLNELVEYHR 135
DS K++L K FNS+ EL+EYH+
Sbjct: 65 ETNDSPKKYYL-AEKHVFNSIPELIEYHK 92
Score = 45.9 bits (109), Expect = 2e-06
Identities = 33/89 (37%), Positives = 49/89 (55%), Gaps = 13/89 (14%)
Query: 237 HDWYYGRITRADAERLL-SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQ--------HFK 287
++WY I R+ AE+LL EG F++R S S PG +++S+ G + H K
Sbjct: 6 YEWYNKNINRSKAEKLLRDEGKEGGFMVRDS-SQPGLYTVSLYTKAGGEGNPCIRHYHIK 64
Query: 288 VLRDSSGKFFLWVVK--FNSLNELVEYHR 314
DS K++L K FNS+ EL+EYH+
Sbjct: 65 ETNDSPKKYYL-AEKHVFNSIPELIEYHK 92
>gnl|CDD|212741 cd11807, SH3_ASPP, Src homology 3 domain of Apoptosis Stimulating
of p53 proteins (ASPP). The ASPP family of proteins
bind to important regulators of apoptosis (p53, Bcl-2,
and RelA) and cell growth (APCL, PP1). They share
similarity at their C-termini, where they harbor a
proline-rich region, four ankyrin (ANK) repeats, and an
SH3 domain. Vertebrates contain three members of the
family: ASPP1, ASPP2, and iASPP. ASPP1 and ASPP2
activate the apoptotic function of the p53 family of
tumor suppressors (p53, p63, and p73), while iASPP is an
oncoprotein that specifically inhibits p53-induced
apoptosis. The expression of ASPP proteins is altered in
tumors; ASPP1 and ASPP2 are downregulated whereas iASPP
is upregulated is some cancer types. ASPP proteins also
bind and regulate protein phosphatase 1 (PP1), and this
binding is competitive with p53 binding. The SH3 domain
and the ANK repeats of ASPP contribute to the p53
binding site; they bind to the DNA binding domain of
p53. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 44.7 bits (106), Expect = 2e-06
Identities = 17/53 (32%), Positives = 26/53 (49%), Gaps = 3/53 (5%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQ---HWWHGEIGARKGLFPATYI 206
V AL+D+ + EL FR GD +TV + D WW + ++G P +
Sbjct: 3 VYALFDYEAENGDELSFREGDELTVLRKGDDDETEWWWARLNDKEGYVPRNLL 55
Score = 41.2 bits (97), Expect = 3e-05
Identities = 21/53 (39%), Positives = 29/53 (54%), Gaps = 2/53 (3%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDD--MNWYRAELDGKEGLIPSNYIEM 55
A D+ A DELSFR+ L +L DD W+ A L+ KEG +P N + +
Sbjct: 5 ALFDYEAENGDELSFREGDELTVLRKGDDDETEWWWARLNDKEGYVPRNLLGL 57
Score = 27.3 bits (61), Expect = 2.0
Identities = 10/35 (28%), Positives = 17/35 (48%), Gaps = 2/35 (5%)
Query: 336 VQALYDFTPQEPGELEFRR--DLKIKRRKSAKTKD 368
V AL+D+ + EL FR +L + R+ +
Sbjct: 3 VYALFDYEAENGDELSFREGDELTVLRKGDDDETE 37
>gnl|CDD|212740 cd11806, SH3_PRMT2, Src homology 3 domain of Protein arginine
N-methyltransferase 2. PRMT2, also called HRMT1L1,
belongs to the arginine methyltransferase protein
family. It functions as a coactivator to both estrogen
receptor alpha (ER-alpha) and androgen receptor (AR),
presumably through arginine methylation. The ER-alpha
transcription factor is involved in cell proliferation,
differentiation, morphogenesis, and apoptosis, and is
also implicated in the development and progression of
breast cancer. PRMT2 and its variants are upregulated in
breast cancer cells and may be involved in modulating
the ER-alpha signaling pathway during formation of
breast cancer. PRMT2 also plays a role in regulating the
function of E2F transcription factors, which are
critical cell cycle regulators, by binding to the
retinoblastoma gene product (RB). It contains an
N-terminal SH3 domain and an AdoMet binding domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 44.3 bits (105), Expect = 2e-06
Identities = 14/48 (29%), Positives = 22/48 (45%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
A+ DF + +L F GD + V + WW E G PA+++
Sbjct: 4 AIADFVATDDSQLSFESGDKLLVLRKPSVDWWWAEHNGCCGYIPASHL 51
Score = 42.8 bits (101), Expect = 7e-06
Identities = 18/52 (34%), Positives = 29/52 (55%), Gaps = 1/52 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
E +A DF AT + +LSF L +L +W+ AE +G G IP++++
Sbjct: 1 EYVAIADFVATDDSQLSFESGDKLLVLRKPSV-DWWWAEHNGCCGYIPASHL 51
>gnl|CDD|212865 cd11932, SH3_SH3RF2_2, Second Src Homology 3 domain of SH3 domain
containing ring finger 2. SH3RF2 is also called POSHER
(POSH-eliminating RING protein) or HEPP1 (heart protein
phosphatase 1-binding protein). It acts as an
anti-apoptotic regulator of the JNK pathway by binding
to and promoting the degradation of SH3RF1 (or POSH), a
scaffold protein that is required for pro-apoptotic JNK
activation. It may also play a role in cardiac functions
together with protein phosphatase 1. SH3RF2 contains an
N-terminal RING finger domain and three SH3 domains.
This model represents the second SH3 domain, located
C-terminal of the first SH3 domain at the N-terminal
half, of SH3RF2. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 44.4 bits (105), Expect = 2e-06
Identities = 20/57 (35%), Positives = 35/57 (61%), Gaps = 6/57 (10%)
Query: 156 LVQALYDFTPQEPGE------LEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
L +ALY+F +E L+F++ D+ITV R D++W G++G + G+FP ++
Sbjct: 1 LCRALYNFDLKEKNREESKDCLKFQKDDIITVISRVDENWAEGKLGDQVGIFPILFV 57
>gnl|CDD|212807 cd11874, SH3_CD2AP-like_2, Second Src Homology 3 domain (SH3B) of
CD2-associated protein and similar proteins. This
subfamily is composed of the second SH3 domain (SH3B) of
CD2AP, CIN85 (Cbl-interacting protein of 85 kDa), and
similar domains. CD2AP and CIN85 are adaptor proteins
that bind to protein partners and assemble complexes
that have been implicated in T cell activation, kidney
function, and apoptosis of neuronal cells. They also
associate with endocytic proteins, actin cytoskeleton
components, and other adaptor proteins involved in
receptor tyrosine kinase (RTK) signaling. CD2AP and the
main isoform of CIN85 contain three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CD2AP and CIN85 to
bind various protein partners and assemble complexes
that have been implicated in many different functions.
SH3B of both proteins have been shown to bind to Cbl. In
the case of CD2AP, its SH3B binds to Cbl at a site
distinct from the c-Cbl/SH3A binding site. The CIN85
SH3B also binds ubiquitin. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 44.2 bits (105), Expect = 2e-06
Identities = 17/49 (34%), Positives = 30/49 (61%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ L+ +TPQ ELE + GD I V ++ WW G++ + G+FP+ ++
Sbjct: 3 KVLFSYTPQNEDELELKVGDTIEVLGEVEEGWWEGKLNGKVGVFPSNFV 51
Score = 38.5 bits (90), Expect = 2e-04
Identities = 13/45 (28%), Positives = 26/45 (57%), Gaps = 1/45 (2%)
Query: 11 ATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
EDEL + +++L ++ W+ +L+GK G+ PSN+++
Sbjct: 10 PQNEDELELKVGDTIEVLGEVEE-GWWEGKLNGKVGVFPSNFVKE 53
>gnl|CDD|212992 cd12059, SH3_MLK1-3, Src Homology 3 domain of Mixed Lineage Kinases
1, 2, and 3. MLKs 1, 2, and 3 are Serine/Threonine
Kinases (STKs), catalyzing the transfer of the
gamma-phosphoryl group from ATP to S/T residues on
protein substrates. MLKs act as mitogen-activated
protein kinase kinase kinases (MAP3Ks, MKKKs, MAPKKKs),
which phosphorylate and activate MAPK kinases (MAPKKs or
MKKs or MAP2Ks), which in turn phosphorylate and
activate MAPKs during signaling cascades that are
important in mediating cellular responses to
extracellular signals. MLKs play roles in immunity and
inflammation, as well as in cell death, proliferation,
and cell cycle regulation. Little is known about the
specific function of MLK1, also called MAP3K9. It is
capable of activating the c-Jun N-terminal kinase
pathway. Mice lacking both MLK1 and MLK2 are viable,
fertile, and have normal life spans. MLK2, also called
MAP3K10, is abundant in brain, skeletal muscle, and
testis. It functions upstream of the MAPK, c-Jun
N-terminal kinase. It binds hippocalcin, a
calcium-sensor protein that protects neurons against
calcium-induced cell death. Both MLK2 and hippocalcin
may be associated with the pathogenesis of Parkinson's
disease. MLK3, also called MAP3K11, is highly expressed
in breast cancer cells and its signaling through c-Jun
N-terminal kinase has been implicated in the migration,
invasion, and malignancy of cancer cells. It also
functions as a negative regulator of Inhibitor of
Nuclear Factor-KappaB Kinase (IKK) and thus, impacts
inflammation and immunity. MLKs contain an SH3 domain, a
catalytic kinase domain, a leucine zipper, a
proline-rich region, and a CRIB domain that mediates
binding to GTP-bound Cdc42 and Rac. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 44.4 bits (105), Expect = 2e-06
Identities = 19/53 (35%), Positives = 29/53 (54%), Gaps = 5/53 (9%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRS-----DQHWWHGEIGARKGLFPATYI 206
A++D+ EL RRGD + V + D+ WW G+I R G+FP+ Y+
Sbjct: 4 AVFDYEASAEDELTLRRGDRVEVLSKDSAVSGDEGWWTGKINDRVGIFPSNYV 56
Score = 43.6 bits (103), Expect = 3e-06
Identities = 17/55 (30%), Positives = 33/55 (60%), Gaps = 4/55 (7%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMED----DMNWYRAELDGKEGLIPSNYIEM 55
A D+ A+AEDEL+ R+ +++L+ + D W+ +++ + G+ PSNY+
Sbjct: 4 AVFDYEASAEDELTLRRGDRVEVLSKDSAVSGDEGWWTGKINDRVGIFPSNYVTS 58
>gnl|CDD|212856 cd11923, SH3_Sorbs2_2, Second Src Homology 3 domain of Sorbin and
SH3 domain containing 2 (Sorbs2), also called
Arg-binding protein 2 (ArgBP2). Sorbs2 or ArgBP2 is an
adaptor protein containing one sorbin homology (SoHo)
and three SH3 domains. It regulates actin-dependent
processes including cell adhesion, morphology, and
migration. It is expressed in many tissues and is
abundant in the heart. Like vinexin, it is found in
focal adhesion where it interacts with vinculin and
afadin. It also localizes in epithelial cell stress
fibers and in cardiac muscle cell Z-discs. Sorbs2 has
been implicated to play roles in the signaling of
c-Arg, Akt, and Pyk2. Other interaction partners of
Sorbs2 include c-Abl, flotillin, spectrin, dynamin 1/2,
synaptojanin, PTP-PEST, among others. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 57
Score = 44.1 bits (104), Expect = 2e-06
Identities = 22/56 (39%), Positives = 36/56 (64%), Gaps = 3/56 (5%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDG--KEGLIPSNYIEM 55
EA+AK++FNA ELS RK + +L + D NWY ++ G ++G+ P +Y+E+
Sbjct: 2 EAVAKYNFNADTNVELSLRKGDRV-VLLKQVDQNWYEGKIPGTNRQGIFPVSYVEV 56
Score = 43.0 bits (101), Expect = 5e-06
Identities = 18/50 (36%), Positives = 30/50 (60%), Gaps = 2/50 (4%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGA--RKGLFPATYI 206
A Y+F EL R+GD + + + DQ+W+ G+I R+G+FP +Y+
Sbjct: 5 AKYNFNADTNVELSLRKGDRVVLLKQVDQNWYEGKIPGTNRQGIFPVSYV 54
>gnl|CDD|212714 cd11780, SH3_Sorbs_3, Third (or C-terminal) Src Homology 3 domain
of Sorbin and SH3 domain containing (Sorbs) proteins and
similar domains. This family, also called the vinexin
family, is composed predominantly of adaptor proteins
containing one sorbin homology (SoHo) and three SH3
domains. Members include the third SH3 domains of Sorbs1
(or ponsin), Sorbs2 (or ArgBP2), Vinexin (or Sorbs3),
and similar domains. They are involved in the regulation
of cytoskeletal organization, cell adhesion, and growth
factor signaling. Members of this family bind multiple
partners including signaling molecules like c-Abl,
c-Arg, Sos, and c-Cbl, as well as cytoskeletal molecules
such as vinculin and afadin. They may have overlapping
functions. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 43.8 bits (104), Expect = 2e-06
Identities = 20/51 (39%), Positives = 28/51 (54%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARK--GLFPATYI 206
+ALY +TPQ ELE R GD++ V ++ D W+ G G FP Y+
Sbjct: 3 RALYSYTPQNEDELELREGDIVYVMEKCDDGWFVGTSERTGLFGTFPGNYV 53
>gnl|CDD|212839 cd11906, SH3_BTK, Src Homology 3 domain of Bruton's tyrosine
kinase. BTK is a cytoplasmic (or nonreceptor) tyr
kinase containing Src homology protein interaction
domains (SH3, SH2) N-terminal to the catalytic tyr
kinase domain. It also contains an N-terminal pleckstrin
homology (PH) domain, which binds the products of PI3K
and allows membrane recruitment and activation, and the
Tec homology (TH) domain with proline-rich and
zinc-binding regions. Btk is expressed in B-cells, and a
variety of myeloid cells including mast cells,
platelets, neutrophils, and dendrictic cells. It
interacts with a variety of partners, from cytosolic
proteins to nuclear transcription factors, suggesting a
diversity of functions. Stimulation of a diverse array
of cell surface receptors, including antigen engagement
of the B-cell receptor (BCR), leads to PH-mediated
membrane translocation of Btk and subsequent
phosphorylation by Src kinase and activation. Btk plays
an important role in the life cycle of B-cells including
their development, differentiation, proliferation,
survival, and apoptosis. Mutations in Btk cause the
primary immunodeficiency disease, X-linked
agammaglobulinaemia (XLA) in humans. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 43.7 bits (103), Expect = 3e-06
Identities = 23/77 (29%), Positives = 37/77 (48%), Gaps = 27/77 (35%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWY 216
V ALYD+TP +L+ R+G+ Y++ E ++ W+
Sbjct: 3 VVALYDYTPMNAQDLQLRKGE--------------------------EYVILEESNLPWW 36
Query: 217 RA-ELDGKEGLIPSNYI 232
RA + +G+EG IPSNY+
Sbjct: 37 RARDKNGREGYIPSNYV 53
Score = 40.2 bits (94), Expect = 5e-05
Identities = 19/54 (35%), Positives = 32/54 (59%), Gaps = 2/54 (3%)
Query: 1 MEAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRA-ELDGKEGLIPSNYI 53
+ +A +D+ +L RK + IL E ++ W+RA + +G+EG IPSNY+
Sbjct: 1 KKVVALYDYTPMNAQDLQLRKGEEYVILE-ESNLPWWRARDKNGREGYIPSNYV 53
Score = 26.7 bits (59), Expect = 3.2
Identities = 9/20 (45%), Positives = 13/20 (65%)
Query: 336 VQALYDFTPQEPGELEFRRD 355
V ALYD+TP +L+ R+
Sbjct: 3 VVALYDYTPMNAQDLQLRKG 22
>gnl|CDD|212895 cd11962, SH3_Abp1_fungi_C1, First C-terminal Src homology 3 domain
of Fungal Actin-binding protein 1. Abp1 is an adaptor
protein that functions in receptor-mediated endocytosis
and vesicle trafficking. It contains an N-terminal
actin-binding module, the actin-depolymerizing factor
(ADF) homology domain, a central proline-rich region,
and a C-terminal SH3 domain (many yeast Abp1 proteins
contain two C-terminal SH3 domains). Yeast Abp1 also
contains two acidic domains that bind directly to the
Arp2/3 complex, which is required to initiate actin
polymerization. The SH3 domain of yeast Abp1 binds and
localizes the kinases, Ark1p and Prk1p, which facilitate
actin patch disassembly following vesicle
internalization. It also mediates the localization to
the actin patch of the synaptojanin-like protein, Sjl2p,
which plays a key role in endocytosis. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 54
Score = 43.6 bits (103), Expect = 3e-06
Identities = 17/50 (34%), Positives = 26/50 (52%), Gaps = 1/50 (2%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIG-ARKGLFPATYI 206
LYD+ E E+E G+++T + D+ WW G GLFP+ Y+
Sbjct: 3 VVLYDYEKDEDNEIELVEGEIVTNIEMVDEDWWMGTNSKGESGLFPSNYV 52
Score = 37.5 bits (87), Expect = 5e-04
Identities = 14/53 (26%), Positives = 29/53 (54%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
A+ +D+ ++E+ + +++ + M D+ W G+ GL PSNY+E+
Sbjct: 2 AVVLYDYEKDEDNEIELVEGEIVTNIEMVDEDWWMGTNSKGESGLFPSNYVEL 54
>gnl|CDD|212701 cd11767, SH3_Nck_3, Third Src Homology 3 domain of Nck adaptor
proteins. This group contains the third SH3 domain of
Nck, the first SH3 domain of Caenorhabditis elegans
Ced-2 (Cell death abnormality protein 2), and similar
domains. Nck adaptor proteins regulate actin
cytoskeleton dynamics by linking proline-rich effector
molecules to protein tyrosine kinases and
phosphorylated signaling intermediates. They contain
three SH3 domains and a C-terminal SH2 domain. They
function downstream of the PDGFbeta receptor and are
involved in Rho GTPase signaling and actin dynamics.
Vertebrates contain two Nck adaptor proteins: Nck1
(also called Nckalpha) and Nck2 (also called Nckbeta or
Growth factor receptor-bound protein 4, Grb4), which
show partly overlapping functions but also bind
distinct targets. Their SH3 domains are involved in
recruiting downstream effector molecules, such as the
N-WASP/Arp2/3 complex, which when activated induces
actin polymerization that results in the production of
pedestals, or protrusions of the plasma membrane. The
third SH3 domain of Nck appears to prefer ligands with
a PxAPxR motif. SH3 domains are protein interaction
domains that usually bind to proline-rich ligands with
moderate affinity and selectivity, preferentially a
PxxP motif. Ced-2 is a cell corpse engulfment protein
that interacts with Ced-5 in a pathway that regulates
the activation of Ced-10, a Rac small GTPase.
Length = 56
Score = 43.8 bits (104), Expect = 3e-06
Identities = 21/55 (38%), Positives = 33/55 (60%), Gaps = 2/55 (3%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNM-EDDMNWYRAE-LDGKEGLIPSNYIE 54
+A + F ++ELSF K + L+I+ EDD +W++A G GL+P NY+E
Sbjct: 1 VVVALYPFTGENDEELSFEKGERLEIIEKPEDDPDWWKARNALGTTGLVPRNYVE 55
Score = 42.7 bits (101), Expect = 8e-06
Identities = 23/79 (29%), Positives = 32/79 (40%), Gaps = 27/79 (34%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDR--SDQHWWHGEIGARKGLFPATYILNMEDDMN 214
V ALY FT + EL F +G+ + + ++ D WW AR L
Sbjct: 2 VVALYPFTGENDEELSFEKGERLEIIEKPEDDPDWWK----ARNAL-------------- 43
Query: 215 WYRAELDGKEGLIPSNYIE 233
G GL+P NY+E
Sbjct: 44 -------GTTGLVPRNYVE 55
>gnl|CDD|212708 cd11774, SH3_Sla1p_2, Second Src Homology 3 domain of the fungal
endocytic adaptor protein Sla1p. Sla1p facilitates
endocytosis by playing a role as an adaptor protein in
coupling components of the actin cytoskeleton to the
endocytic machinery. It interacts with Abp1p, Las17p and
Pan1p, which are activator proteins of actin-related
protein 2/3 (Arp2/3). Sla1p contains multiple domains
including three SH3 domains, a SAM (sterile alpha motif)
domain, and a Sla1 homology domain 1 (SHD1), which binds
to the NPFXD motif that is found in many integral
membrane proteins such as the Golgi-localized
Arf-binding protein Lsb5p and the P4-ATPases, Drs2p and
Dnf1p. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 43.2 bits (102), Expect = 4e-06
Identities = 22/51 (43%), Positives = 26/51 (50%), Gaps = 1/51 (1%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHW-WHGEIGARKGLFPATYI 206
+ALYD+ Q EL F GD + V D SD W G G + G PA YI
Sbjct: 2 AKALYDYDKQTEEELSFNEGDTLDVYDDSDSDWILVGFNGTQFGFVPANYI 52
Score = 35.5 bits (82), Expect = 0.003
Identities = 17/52 (32%), Positives = 30/52 (57%), Gaps = 2/52 (3%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKE-GLIPSNYI 53
A A +D++ E+ELSF + L + + + D +W +G + G +P+NYI
Sbjct: 2 AKALYDYDKQTEEELSFNEGDTLDVYD-DSDSDWILVGFNGTQFGFVPANYI 52
>gnl|CDD|212838 cd11905, SH3_Tec, Src Homology 3 domain of Tec (Tyrosine kinase
expressed in hepatocellular carcinoma). Tec is a
cytoplasmic (or nonreceptor) tyr kinase containing Src
homology protein interaction domains (SH3, SH2)
N-terminal to the catalytic tyr kinase domain. It also
contains an N-terminal pleckstrin homology (PH) domain,
which binds the products of PI3K and allows membrane
recruitment and activation, and the Tec homology (TH)
domain, which contains proline-rich and zinc-binding
regions. It is more widely-expressed than other Tec
subfamily kinases. Tec is found in endothelial cells,
both B- and T-cells, and a variety of myeloid cells
including mast cells, erythroid cells, platelets,
macrophages and neutrophils. Tec is a key component of
T-cell receptor (TCR) signaling, and is important in
TCR-stimulated proliferation, IL-2 production and
phospholipase C-gamma1 activation. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 43.6 bits (103), Expect = 4e-06
Identities = 26/80 (32%), Positives = 36/80 (45%), Gaps = 25/80 (31%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNW 215
+V A+YDF P EP +L G+ + +++D HWW AR
Sbjct: 2 IVVAMYDFQPTEPHDLRLETGEEYVILEKNDVHWWK----AR------------------ 39
Query: 216 YRAELDGKEGLIPSNYIEMK 235
+ GKEG IPSNY+ K
Sbjct: 40 ---DKYGKEGYIPSNYVTGK 56
Score = 40.2 bits (94), Expect = 5e-05
Identities = 20/55 (36%), Positives = 32/55 (58%), Gaps = 2/55 (3%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRA-ELDGKEGLIPSNYIEMK 56
+A +DF T +L + IL ++D++W++A + GKEG IPSNY+ K
Sbjct: 3 VVAMYDFQPTEPHDLRLETGEEYVILE-KNDVHWWKARDKYGKEGYIPSNYVTGK 56
>gnl|CDD|198247 cd10384, SH2_SOCS3, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 44.7 bits (106), Expect = 4e-06
Identities = 19/60 (31%), Positives = 31/60 (51%), Gaps = 1/60 (1%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
+Y+ ++ +A LLS + G FLIR S F+LSVK G ++ ++ + F L
Sbjct: 12 FYWSTVSGKEANLLLSAEPAGTFLIRDSSDQRHFFTLSVKTESGTKNLRIQCEGGS-FSL 70
Score = 44.7 bits (106), Expect = 4e-06
Identities = 19/60 (31%), Positives = 31/60 (51%), Gaps = 1/60 (1%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
+Y+ ++ +A LLS + G FLIR S F+LSVK G ++ ++ + F L
Sbjct: 12 FYWSTVSGKEANLLLSAEPAGTFLIRDSSDQRHFFTLSVKTESGTKNLRIQCEGGS-FSL 70
>gnl|CDD|212931 cd11998, SH3_PACSIN1-2, Src homology 3 domain of Protein kinase C
and Casein kinase Substrate in Neurons 1 (PACSIN1) and
PACSIN 2. PACSIN 1 or Syndapin I (Synaptic
dynamin-associated protein I) is expressed specifically
in the brain and is localized in neurites and synaptic
boutons. It binds the brain-specific proteins dynamin
I, synaptojanin, synapsin I, and neural Wiskott-Aldrich
syndrome protein (nWASP), and functions as a link
between the cytoskeletal machinery and synaptic vesicle
endocytosis. PACSIN 1 interacts with huntingtin and may
be implicated in the neuropathology of Huntington's
disease. PACSIN 2 or Syndapin II is expressed
ubiquitously and is involved in the regulation of
tubulin polymerization. It associates with Golgi
membranes and forms a complex with dynamin II which is
crucial in promoting vesicle formation from the
trans-Golgi network. PACSINs act as regulators of
cytoskeletal and membrane dynamics. Vetebrates harbor
three isoforms with distinct expression patterns and
specific functions. PACSINs contain an N-terminal F-BAR
domain and a C-terminal SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 43.4 bits (102), Expect = 4e-06
Identities = 21/51 (41%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELD-GKEGLIPSNYIE 54
A +D++ +DELSF+ L L ED+ W + LD G+ GL P+NY+E
Sbjct: 5 ALYDYDGQEQDELSFKAGDELTKLEDEDEQGWCKGRLDSGQVGLYPANYVE 55
Score = 43.0 bits (101), Expect = 5e-06
Identities = 22/52 (42%), Positives = 32/52 (61%), Gaps = 2/52 (3%)
Query: 157 VQALYDFTPQEPGELEFRRGDVIT-VTDRSDQHWWHGEI-GARKGLFPATYI 206
V+ALYD+ QE EL F+ GD +T + D +Q W G + + GL+PA Y+
Sbjct: 3 VRALYDYDGQEQDELSFKAGDELTKLEDEDEQGWCKGRLDSGQVGLYPANYV 54
>gnl|CDD|212771 cd11837, SH3_Intersectin_2, Second Src homology 3 domain (or SH3B)
of Intersectin. Intersectins (ITSNs) are adaptor
proteins that function in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction.
They are essential for initiating clathrin-coated pit
formation. They bind to many proteins through their
multidomain structure and facilitate the assembly of
multimeric complexes. Vertebrates contain two ITSN
proteins, ITSN1 and ITSN2, which exist in alternatively
spliced short and long isoforms. The short isoforms
contain two Eps15 homology domains (EH1 and EH2), a
coiled-coil region and five SH3 domains (SH3A-E), while
the long isoforms, in addition, contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin homology (PH)
and C2 domains. ITSN1 and ITSN2 are both widely
expressed, with variations depending on tissue type and
stage of development. The second SH3 domain (or SH3B) of
ITSN1 has been shown to bind WNK and CdGAP. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 43.1 bits (102), Expect = 4e-06
Identities = 19/51 (37%), Positives = 31/51 (60%), Gaps = 2/51 (3%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEI-GARKGLFPATYI 206
ALY + ++ L F +GD+ITV ++ + WW GE+ G +G FP +Y+
Sbjct: 2 ATALYPWRAKKENHLSFAKGDIITVLEQQEM-WWFGELEGGEEGWFPKSYV 51
Score = 38.1 bits (89), Expect = 2e-04
Identities = 17/54 (31%), Positives = 30/54 (55%), Gaps = 3/54 (5%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAEL-DGKEGLIPSNYIEM 55
A A + + A E+ LSF K ++ +L ++ W+ EL G+EG P +Y++
Sbjct: 2 ATALYPWRAKKENHLSFAKGDIITVLEQQE--MWWFGELEGGEEGWFPKSYVKE 53
>gnl|CDD|212728 cd11794, SH3_DNMBP_N1, First N-terminal Src homology 3 domain of
Dynamin Binding Protein, also called Tuba. DNMBP or
Tuba is a cdc42-specific guanine nucleotide exchange
factor (GEF) that contains four N-terminal SH3 domains,
a central RhoGEF [or Dbl homology (DH)] domain followed
by a Bin/Amphiphysin/Rvs (BAR) domain, and two
C-terminal SH3 domains. It provides a functional link
between dynamin and key regulatory proteins of the actin
cytoskeleton. It plays an important role in regulating
cell junction configuration. The four N-terminal SH3
domains of DNMBP binds the GTPase dynamin, which plays
an important role in the fission of endocytic vesicles.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 51
Score = 43.3 bits (102), Expect = 4e-06
Identities = 18/50 (36%), Positives = 26/50 (52%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V+A++DF P EL GDVI V D+ W G G FP++++
Sbjct: 2 VRAIFDFCPSVSEELPLFAGDVIEVLKVVDEFWLLGTKEGVTGQFPSSFV 51
>gnl|CDD|212750 cd11816, SH3_Eve1_3, Third Src homology 3 domain of ADAM-binding
protein Eve-1. Eve-1, also called SH3 domain-containing
protein 19 (SH3D19) or EEN-binding protein (EBP), exists
in multiple alternatively spliced isoforms. The longest
isoform contains five SH3 domain in the C-terminal
region and seven proline-rich motifs in the N-terminal
region. It is abundantly expressed in skeletal muscle
and heart, and may be involved in regulating the
activity of ADAMs (A disintegrin and metalloproteases).
Eve-1 interacts with EEN, an endophilin involved in
endocytosis and may be the target of the MLL-EEN fusion
protein that is implicated in leukemogenesis. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 51
Score = 43.2 bits (102), Expect = 4e-06
Identities = 17/48 (35%), Positives = 28/48 (58%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
A +DF ++ EL F GDVIT+ + + W GE+ + G+FP ++
Sbjct: 4 ARFDFEGEQEDELSFSEGDVITLKEYVGEEWAKGELNGKIGIFPLNFV 51
Score = 38.9 bits (91), Expect = 1e-04
Identities = 18/51 (35%), Positives = 29/51 (56%), Gaps = 1/51 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
+A+ DF EDELSF + V+ + + W + EL+GK G+ P N++
Sbjct: 2 CVARFDFEGEQEDELSFSEGDVITLKEYVGE-EWAKGELNGKIGIFPLNFV 51
>gnl|CDD|212923 cd11990, SH3_Intersectin2_2, Second Src homology 3 domain (or SH3B)
of Intersectin-2. Intersectin-2 (ITSN2) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN2 also functions as a specific GEF for Cdc42
activation in epithelial morphogenesis, and is required
in mitotic spindle orientation. It exists in
alternatively spliced short and long isoforms. The short
isoform contains two Eps15 homology domains (EH1 and
EH2), a coiled-coil region and five SH3 domains
(SH3A-E), while the long isoform, in addition, contains
RhoGEF (also called Dbl-homologous or DH), Pleckstrin
homology (PH) and C2 domains. The second SH3 domain (or
SH3B) of ITSN2 is expected to bind protein partners,
similar to ITSN1 which has been shown to bind WNK and
CdGAP. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 43.1 bits (101), Expect = 4e-06
Identities = 18/51 (35%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
QAL +T ++ L F + D+ITV ++ ++WW GE+ +G FP +Y+
Sbjct: 1 KAQALCSWTAKKDNHLNFSKNDIITVLEQQ-ENWWFGEVHGGRGWFPKSYV 50
Score = 31.9 bits (72), Expect = 0.050
Identities = 13/47 (27%), Positives = 27/47 (57%), Gaps = 2/47 (4%)
Query: 9 FNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
+ A ++ L+F K+ ++ +L E NW+ E+ G G P +Y+++
Sbjct: 8 WTAKKDNHLNFSKNDIITVL--EQQENWWFGEVHGGRGWFPKSYVKL 52
>gnl|CDD|212930 cd11997, SH3_PACSIN3, Src homology 3 domain of Protein kinase C and
Casein kinase Substrate in Neurons 3 (PACSIN3). PACSIN
3 or Syndapin III (Synaptic dynamin-associated protein
III) is expressed ubiquitously and regulates glucose
uptake in adipocytes through its role in GLUT1
trafficking. It also modulates the subcellular
localization and stimulus-specific function of the
cation channel TRPV4. PACSINs act as regulators of
cytoskeletal and membrane dynamics. Vetebrates harbor
three isoforms with distinct expression patterns and
specific functions. PACSINs contain an N-terminal F-BAR
domain and a C-terminal SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 43.0 bits (101), Expect = 5e-06
Identities = 21/52 (40%), Positives = 33/52 (63%), Gaps = 2/52 (3%)
Query: 157 VQALYDFTPQEPGELEFRRG-DVITVTDRSDQHWWHGEI-GARKGLFPATYI 206
V+ALYD+T QE EL F+ G +++ + + +Q W G + R GL+PA Y+
Sbjct: 4 VRALYDYTGQEADELSFKAGEELLKIGEEDEQGWCKGRLLSGRIGLYPANYV 55
Score = 40.3 bits (94), Expect = 5e-05
Identities = 19/51 (37%), Positives = 29/51 (56%), Gaps = 1/51 (1%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAEL-DGKEGLIPSNYIE 54
A +D+ DELSF+ + L + ED+ W + L G+ GL P+NY+E
Sbjct: 6 ALYDYTGQEADELSFKAGEELLKIGEEDEQGWCKGRLLSGRIGLYPANYVE 56
Score = 27.2 bits (60), Expect = 2.3
Identities = 11/18 (61%), Positives = 14/18 (77%)
Query: 336 VQALYDFTPQEPGELEFR 353
V+ALYD+T QE EL F+
Sbjct: 4 VRALYDYTGQEADELSFK 21
>gnl|CDD|212855 cd11922, SH3_Sorbs1_2, Second Src Homology 3 domain of Sorbin and
SH3 domain containing 1 (Sorbs1), also called ponsin.
Sorbs1 is also called ponsin, SH3P12, or CAP (c-Cbl
associated protein). It is an adaptor protein
containing one sorbin homology (SoHo) and three SH3
domains. It binds Cbl and plays a major role in
regulating the insulin signaling pathway by enhancing
insulin-induced phosphorylation of Cbl. Sorbs1, like
vinexin, localizes at cell-ECM and cell-cell adhesion
sites where it binds vinculin, paxillin, and afadin. It
may function in the control of cell motility. Other
interaction partners of Sorbs1 include c-Abl, Sos,
flotillin, Grb4, ataxin-7, filamin C, among others. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 43.1 bits (101), Expect = 5e-06
Identities = 21/56 (37%), Positives = 35/56 (62%), Gaps = 3/56 (5%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDG--KEGLIPSNYIEM 55
EAIAK +FN + E+SFRK + + +L D+ NWY + G ++G+ P Y+++
Sbjct: 2 EAIAKFNFNGDTQVEMSFRKGERITLLRQVDE-NWYEGRIPGTSRQGIFPITYVDV 56
Score = 42.7 bits (100), Expect = 9e-06
Identities = 18/50 (36%), Positives = 32/50 (64%), Gaps = 2/50 (4%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIG--ARKGLFPATYI 206
A ++F E+ FR+G+ IT+ + D++W+ G I +R+G+FP TY+
Sbjct: 5 AKFNFNGDTQVEMSFRKGERITLLRQVDENWYEGRIPGTSRQGIFPITYV 54
>gnl|CDD|212731 cd11797, SH3_DNMBP_N4, Fourth N-terminal Src homology 3 domain of
Dynamin Binding Protein, also called Tuba. DNMBP or
Tuba is a cdc42-specific guanine nucleotide exchange
factor (GEF) that contains four N-terminal SH3 domains,
a central RhoGEF [or Dbl homology (DH)] domain followed
by a Bin/Amphiphysin/Rvs (BAR) domain, and two
C-terminal SH3 domains. It provides a functional link
between dynamin and key regulatory proteins of the actin
cytoskeleton. It plays an important role in regulating
cell junction configuration. The four N-terminal SH3
domains of DNMBP bind the GTPase dynamin, which plays an
important role in the fission of endocytic vesicles. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 50
Score = 42.8 bits (101), Expect = 5e-06
Identities = 19/44 (43%), Positives = 25/44 (56%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFP 202
ALY F EP EL+F GD I + + W GE+ R+G+FP
Sbjct: 4 ALYRFQALEPNELDFEVGDRIRIIATLEDGWLEGELKGRRGIFP 47
Score = 28.9 bits (65), Expect = 0.53
Identities = 14/50 (28%), Positives = 24/50 (48%), Gaps = 1/50 (2%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNY 52
+A + F A +EL F ++I+ +D W EL G+ G+ P +
Sbjct: 2 GVALYRFQALEPNELDFEVGDRIRIIATLED-GWLEGELKGRRGIFPHRF 50
>gnl|CDD|198208 cd10345, SH2_C-SH2_Zap70_Syk_like, C-terminal Src homology 2 (SH2)
domain found in Zeta-chain-associated protein kinase 70
(ZAP-70) and Spleen tyrosine kinase (Syk) proteins.
ZAP-70 and Syk comprise a family of hematopoietic cell
specific protein tyrosine kinases (PTKs) that are
required for antigen and antibody receptor function.
ZAP-70 is expressed in T and natural killer (NK) cells
and Syk is expressed in B cells, mast cells,
polymorphonuclear leukocytes, platelets, macrophages,
and immature T cells. They are required for the proper
development of T and B cells, immune receptors, and
activating NK cells. They consist of two N-terminal Src
homology 2 (SH2) domains and a C-terminal kinase domain
separated from the SH2 domains by a linker or hinge
region. Phosphorylation of both tyrosine residues within
the Immunoreceptor Tyrosine-based Activation Motifs
(ITAM; consensus sequence Yxx[LI]x(7,8)Yxx[LI]) by the
Src-family PTKs is required for efficient interaction of
ZAP-70 and Syk with the receptor subunits and for
receptor function. ZAP-70 forms two phosphotyrosine
binding pockets, one of which is shared by both SH2
domains. In Syk the two SH2 domains do not form such a
phosphotyrosine-binding site. The SH2 domains here are
believed to function independently. In addition, the two
SH2 domains of Syk display flexibility in their relative
orientation, allowing Syk to accommodate a greater
variety of spacing sequences between the ITAM
phosphotyrosines and singly phosphorylated non-classical
ITAM ligands. This model contains the C-terminus SH2
domains of both Syk and Zap70. In general SH2 domains
are involved in signal transduction. They typically
bind pTyr-containing ligands via two surface pockets, a
pTyr and hydrophobic binding pocket, allowing proteins
with SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 95
Score = 44.3 bits (104), Expect = 5e-06
Identities = 24/77 (31%), Positives = 48/77 (62%), Gaps = 4/77 (5%)
Query: 60 WYYGRITRADAERLLSN--KHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 117
W++G+I+R ++E+++ K G FLIR + + G ++L + V H+++ +D +GK
Sbjct: 2 WFHGKISREESEQIVLIGSKTNGKFLIR-ARDNNGSYALCLLHEGKVLHYRIDKDKTGKL 60
Query: 118 FL-WVVKFNSLNELVEY 133
+ KF++L +LVE+
Sbjct: 61 SIPEGKKFDTLWQLVEH 77
Score = 44.3 bits (104), Expect = 5e-06
Identities = 24/77 (31%), Positives = 48/77 (62%), Gaps = 4/77 (5%)
Query: 239 WYYGRITRADAERLLSN--KHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 296
W++G+I+R ++E+++ K G FLIR + + G ++L + V H+++ +D +GK
Sbjct: 2 WFHGKISREESEQIVLIGSKTNGKFLIR-ARDNNGSYALCLLHEGKVLHYRIDKDKTGKL 60
Query: 297 FL-WVVKFNSLNELVEY 312
+ KF++L +LVE+
Sbjct: 61 SIPEGKKFDTLWQLVEH 77
>gnl|CDD|212978 cd12045, SH3_SKAP2, Src Homology 3 domain of Src Kinase-Associated
Phosphoprotein 2. SKAP2, also called SKAP55-Related
(SKAP55R) or SKAP55 homolog (SKAP-HOM or SKAP55-HOM), is
an immune cell-specific adaptor protein that plays an
important role in adhesion and migration of B-cells and
macrophages. Binding partners include ADAP (adhesion and
degranulation-promoting adaptor protein), YopH, SHPS1,
and HPK1. SKAP2 has also been identified as a substrate
for lymphoid-specific tyrosine phosphatase (Lyp), which
has been implicated in a wide variety of autoimmune
diseases. It contains a pleckstrin homology (PH) domain,
a C-terminal SH3 domain, and several tyrosine
phosphorylation sites. Like SKAP1, SKAP2 is expected to
bind primarily to a proline-rich region of ADAP through
its SH3 domain; its degradation may be regulated by
ADAP. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 43.0 bits (101), Expect = 5e-06
Identities = 21/51 (41%), Positives = 27/51 (52%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQH--WWHGEIGARKGLFPATYI 206
Q L+D T +P EL F+RGD I + + WW GE+ GL P YI
Sbjct: 3 QGLWDCTGDQPDELSFKRGDTIYILSKEYNRFGWWVGEMKGTIGLVPKAYI 53
Score = 36.8 bits (85), Expect = 8e-04
Identities = 16/40 (40%), Positives = 24/40 (60%), Gaps = 1/40 (2%)
Query: 15 DELSFRKSQVLKILNMEDDM-NWYRAELDGKEGLIPSNYI 53
DELSF++ + IL+ E + W+ E+ G GL+P YI
Sbjct: 14 DELSFKRGDTIYILSKEYNRFGWWVGEMKGTIGLVPKAYI 53
>gnl|CDD|212904 cd11971, SH3_Abi1, Src homology 3 domain of Abl Interactor 1.
Abi1, also called e3B1, is a central regulator of actin
cytoskeletal reorganization through interactions with
many protein complexes. It is part of WAVE, a
nucleation-promoting factor complex, that links Rac 1
activation to actin polymerization causing lamellipodia
protrusion at the plasma membrane. Abi1 interact with
formins to promote protrusions at the leading edge of
motile cells. It also is a target of alpha4 integrin,
regulating membrane protrusions at sites of integrin
engagement. Abi proteins are adaptor proteins serving as
binding partners and substrates of Abl tyrosine kinases.
They are involved in regulating actin cytoskeletal
reorganization and play important roles in
membrane-ruffling, endocytosis, cell motility, and cell
migration. Abi proteins contain a homeobox homology
domain, a proline-rich region, and a SH3 domain. The SH3
domain of Abi binds to a PxxP motif in Abl. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 43.1 bits (101), Expect = 6e-06
Identities = 18/50 (36%), Positives = 27/50 (54%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V A+YD++ + EL F G +I V ++D W+ G GLFP Y+
Sbjct: 2 VVAIYDYSKDKDDELSFMEGAIIYVIKKNDDGWYEGVCNGVTGLFPGNYV 51
Score = 41.9 bits (98), Expect = 1e-05
Identities = 19/57 (33%), Positives = 32/57 (56%), Gaps = 1/57 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEMKNH 58
+ +A +D++ +DELSF + ++ ++ DD WY +G GL P NY+E H
Sbjct: 1 KVVAIYDYSKDKDDELSFMEGAIIYVIKKNDD-GWYEGVCNGVTGLFPGNYVESIMH 56
>gnl|CDD|212902 cd11969, SH3_PLCgamma2, Src homology 3 domain of Phospholipase C
(PLC) gamma 2. PLCgamma2 is primarily expressed in
haematopoietic cells, specifically in B cells. It is
activated by tyrosine phosphorylation by B cell receptor
(BCR) kinases and is recruited to the plasma membrane
where its substrate is located. It is required in
pre-BCR signaling and in the maturation of B cells. PLCs
catalyze the hydrolysis of phosphatidylinositol
(4,5)-bisphosphate [PtdIns(4,5)P2] to produce
Ins(1,4,5)P3 and diacylglycerol (DAG). Ins(1,4,5)P3
initiates the calcium signaling cascade while DAG
functions as an activator of PKC. PLCgamma contains a
Pleckstrin homology (PH) domain followed by an
elongation factor (EF) domain, two catalytic regions of
PLC domains that flank two tandem SH2 domains, followed
by a SH3 domain and C2 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 42.9 bits (101), Expect = 6e-06
Identities = 17/51 (33%), Positives = 28/51 (54%), Gaps = 1/51 (1%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGAR-KGLFPATYI 206
V+ALYD+ + EL F +G +I + WW G+ G + + FP+ Y+
Sbjct: 2 VKALYDYRAKRSDELSFCKGALIHNVSKETGGWWKGDYGGKVQHYFPSNYV 52
Score = 31.3 bits (71), Expect = 0.080
Identities = 18/51 (35%), Positives = 29/51 (56%), Gaps = 2/51 (3%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGK-EGLIPSNYIE 54
A +D+ A DELSF K ++ ++ E W++ + GK + PSNY+E
Sbjct: 4 ALYDYRAKRSDELSFCKGALIHNVSKETG-GWWKGDYGGKVQHYFPSNYVE 53
>gnl|CDD|198263 cd10400, SH2_SAP1a, Src homology 2 (SH2) domain found in
SLAM-associated protein (SAP) 1a. The X-linked
lymphoproliferative syndrome (XLP) gene encodes SAP
(also called SH2D1A/DSHP) a protein that consists of a 5
residue N-terminus, a single SH2 domain, and a short 25
residue C-terminal tail. XLP is characterized by an
extreme sensitivity to Epstein-Barr virus. Both T and
natural killer (NK) cell dysfunctions have been seen in
XLP patients. SAP binds the cytoplasmic tail of
Signaling lymphocytic activation molecule (SLAM), 2B4,
Ly-9, and CD84. SAP is believed to function as a
signaling inhibitor, by blocking or regulating binding
of other signaling proteins. SAP and the SAP-like
protein EAT-2 recognize the sequence motif TIpYXX[VI],
which is found in the cytoplasmic domains of a
restricted number of T, B, and NK cell surface receptors
and are proposed to be natural inhibitors or regulators
of the physiological role of a small family of receptors
on the surface of these cells. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 44.1 bits (104), Expect = 6e-06
Identities = 20/56 (35%), Positives = 33/56 (58%), Gaps = 1/56 (1%)
Query: 61 YYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSG 115
Y+G+I+R E+LL +G++L+R SES PG + L V V ++V + +G
Sbjct: 6 YHGKISRETGEKLLLAAGLDGSYLLRDSESVPGVYCLCVLYKGYVYTYRVSQTETG 61
Score = 44.1 bits (104), Expect = 6e-06
Identities = 20/56 (35%), Positives = 33/56 (58%), Gaps = 1/56 (1%)
Query: 240 YYGRITRADAERLLSNK-HEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSG 294
Y+G+I+R E+LL +G++L+R SES PG + L V V ++V + +G
Sbjct: 6 YHGKISRETGEKLLLAAGLDGSYLLRDSESVPGVYCLCVLYKGYVYTYRVSQTETG 61
>gnl|CDD|198264 cd10401, SH2_C-SH2_Syk_like, C-terminal Src homology 2 (SH2) domain
found in Spleen tyrosine kinase (Syk) proteins. ZAP-70
and Syk comprise a family of hematopoietic cell specific
protein tyrosine kinases (PTKs) that are required for
antigen and antibody receptor function. ZAP-70 is
expressed in T and natural killer (NK) cells and Syk is
expressed in B cells, mast cells, polymorphonuclear
leukocytes, platelets, macrophages, and immature T
cells. They are required for the proper development of T
and B cells, immune receptors, and activating NK cells.
They consist of two N-terminal Src homology 2 (SH2)
domains and a C-terminal kinase domain separated from
the SH2 domains by a linker or hinge region.
Phosphorylation of both tyrosine residues within the
Immunoreceptor Tyrosine-based Activation Motifs (ITAM;
consensus sequence Yxx[LI]x(7,8)Yxx[LI]) by the
Src-family PTKs is required for efficient interaction of
ZAP-70 and Syk with the receptor subunits and for
receptor function. ZAP-70 forms two phosphotyrosine
binding pockets, one of which is shared by both SH2
domains. In Syk the two SH2 domains do not form such a
phosphotyrosine-binding site. The SH2 domains here are
believed to function independently. In addition, the two
SH2 domains of Syk display flexibility in their relative
orientation, allowing Syk to accommodate a greater
variety of spacing sequences between the ITAM
phosphotyrosines and singly phosphorylated non-classical
ITAM ligands. This model contains the C-terminus SH2
domains of Syk. In general SH2 domains are involved in
signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 99
Score = 44.1 bits (104), Expect = 7e-06
Identities = 25/78 (32%), Positives = 50/78 (64%), Gaps = 4/78 (5%)
Query: 60 WYYGRITRADAERLLSN--KHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 117
W++G+I+R ++E++L K G FLIR +++ G ++L + V H+++ +D +GK
Sbjct: 5 WFHGKISREESEQILLIGSKTNGKFLIRERDNN-GSYALCLLHDGKVLHYRIDKDKTGKL 63
Query: 118 FLWV-VKFNSLNELVEYH 134
+ KF++L +LVE++
Sbjct: 64 SIPDGKKFDTLWQLVEHY 81
Score = 44.1 bits (104), Expect = 7e-06
Identities = 25/78 (32%), Positives = 50/78 (64%), Gaps = 4/78 (5%)
Query: 239 WYYGRITRADAERLLSN--KHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 296
W++G+I+R ++E++L K G FLIR +++ G ++L + V H+++ +D +GK
Sbjct: 5 WFHGKISREESEQILLIGSKTNGKFLIRERDNN-GSYALCLLHDGKVLHYRIDKDKTGKL 63
Query: 297 FLWV-VKFNSLNELVEYH 313
+ KF++L +LVE++
Sbjct: 64 SIPDGKKFDTLWQLVEHY 81
>gnl|CDD|212766 cd11832, SH3_Shank, Src homology 3 domain of SH3 and multiple
ankyrin repeat domains (Shank) proteins. Shank proteins
carry scaffolding functions through multiple sites of
protein-protein interaction in its domain architecture,
including ankyrin (ANK) repeats, a long proline rich
region, as well as SH3, PDZ, and SAM domains. They bind
a variety of membrane and cytosolic proteins, and exist
in alternatively spliced isoforms. They are highly
enriched in postsynaptic density (PSD) where they
interact with the cytoskeleton and with postsynaptic
membrane receptors including NMDA and glutamate
receptors. They are crucial in the construction and
organization of the PSD and dendritic spines of
excitatory synapses. There are three members of this
family (Shank1, Shank2, Shank3) which show distinct and
cell-type specific patterns of expression. Shank1 is
brain-specific; Shank2 is found in neurons, glia,
endocrine cells, liver, and kidney; Shank3 is widely
expressed. The SH3 domain of Shank binds GRIP, a
scaffold protein that binds AMPA receptors and Eph
receptors/ligands. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 50
Score = 42.4 bits (100), Expect = 7e-06
Identities = 15/46 (32%), Positives = 25/46 (54%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPAT 204
A+ ++PQE GE+ +GD + V + +W G + R G FP+
Sbjct: 4 AVKSYSPQEEGEISLHKGDRVKVLSIGEGGFWEGSVRGRTGWFPSD 49
>gnl|CDD|212986 cd12053, SH3_CD2AP_1, First Src Homology 3 domain (SH3A) of
CD2-associated protein. CD2AP, also called CMS (Cas
ligand with Multiple SH3 domains) or METS1
(Mesenchyme-to-Epithelium Transition protein with SH3
domains), is a cytosolic adaptor protein that plays a
role in regulating the cytoskeleton. It is critical in
cell-to-cell union necessary for kidney function. It
also stabilizes the contact between a T cell and
antigen-presenting cells. It is primarily expressed in
podocytes at the cytoplasmic face of the slit diaphragm
and serves as a linker anchoring podocin and nephrin to
the actin cytoskeleton. CD2AP contains three SH3
domains, a proline-rich region, and a C-terminal
coiled-coil domain. All of these domains enable CD2AP
to bind various protein partners and assemble complexes
that have been implicated in many different functions.
This alignment model represents the first SH3 domain
(SH3A) of CD2AP. SH3A binds to the PXXXPR motif present
in c-Cbl and the cytoplasmic domain of cell adhesion
protein CD2. Its interaction with CD2 anchors CD2 at
sites of cell contact. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 56
Score = 42.1 bits (99), Expect = 1e-05
Identities = 16/53 (30%), Positives = 34/53 (64%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
E I ++D++A EDEL+ R ++++ + ++ W EL+G+ G+ P N+++
Sbjct: 1 EYIVEYDYDAVHEDELTIRVGEIIRNVKKLEEEGWLEGELNGRRGMFPDNFVK 53
>gnl|CDD|212845 cd11912, SH3_Bzz1_1, First Src Homology 3 domain of Bzz1 and
similar domains. Bzz1 (or Bzz1p) is a
WASP/Las17-interacting protein involved in endocytosis
and trafficking to the vacuole. It physically interacts
with type I myosins and functions in the early steps of
endocytosis. Together with other proteins, it induces
membrane scission in yeast. Bzz1 contains an N-terminal
F-BAR (FES-CIP4 Homology and Bin/Amphiphysin/Rvs), a
central coiled-coil, and two C-terminal SH3 domains.
This model represents the first C-terminal SH3 domain.
SH3 domains are protein interaction domains that bind
to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 42.2 bits (100), Expect = 1e-05
Identities = 16/49 (32%), Positives = 31/49 (63%), Gaps = 1/49 (2%)
Query: 8 DFNATAEDELSFRKSQVLKILNMEDDMNWYRAELD-GKEGLIPSNYIEM 55
D+ A+ +DE+S + + + +L +D W + G+EGL+P++YIE+
Sbjct: 7 DYTASGDDEVSISEGEEVTVLEPDDGSGWTKVRNGSGEEGLVPTSYIEI 55
Score = 38.4 bits (90), Expect = 2e-04
Identities = 16/54 (29%), Positives = 25/54 (46%), Gaps = 6/54 (11%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWW----HGEIGARKGLFPATYI 206
+ LYD+T E+ G+ +TV + D W +G +GL P +YI
Sbjct: 2 AKVLYDYTASGDDEVSISEGEEVTVLEPDDGSGWTKVRNG--SGEEGLVPTSYI 53
>gnl|CDD|212942 cd12009, SH3_Blk, Src homology 3 domain of Blk Protein Tyrosine
Kinase. Blk is a member of the Src subfamily of
proteins, which are cytoplasmic (or non-receptor) PTKs.
It is expressed specifically in B-cells and is involved
in pre-BCR (B-cell receptor) signaling. Src kinases
contain an N-terminal SH4 domain with a myristoylation
site, followed by SH3 and SH2 domains, a tyr kinase
domain, and a regulatory C-terminal region containing a
conserved tyr. They are activated by
autophosphorylation at the tyr kinase domain, but are
negatively regulated by phosphorylation at the
C-terminal tyr by Csk (C-terminal Src Kinase). The SH3
domain of Src kinases contributes to substrate
recruitment by binding adaptor proteins/substrates, and
regulation of kinase activity through an intramolecular
interaction. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 42.1 bits (99), Expect = 1e-05
Identities = 21/52 (40%), Positives = 33/52 (63%), Gaps = 4/52 (7%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAE--LDGKEGLIPSNYI 53
IA++DF + E +L +K + L++L + D W+ A+ GKEG IPSNY+
Sbjct: 3 IAQYDFVPSNERDLQLKKGEKLQVL--KSDGEWWLAKSLTTGKEGYIPSNYV 52
Score = 36.3 bits (84), Expect = 0.001
Identities = 22/76 (28%), Positives = 32/76 (42%), Gaps = 25/76 (32%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWY 216
V A YDF P +L+ ++G+ + V +SD WW
Sbjct: 2 VIAQYDFVPSNERDLQLKKGEKLQVL-KSDGEWWLA------------------------ 36
Query: 217 RAELDGKEGLIPSNYI 232
++ GKEG IPSNY+
Sbjct: 37 KSLTTGKEGYIPSNYV 52
>gnl|CDD|212725 cd11791, SH3_UBASH3, Src homology 3 domain of Ubiquitin-associated
and SH3 domain-containing proteins, also called TULA (T
cell Ubiquitin LigAnd) family of proteins. UBASH3 or
TULA proteins are also referred to as Suppressor of T
cell receptor Signaling (STS) proteins. They contain an
N-terminal UBA domain, a central SH3 domain, and a
C-terminal histidine phosphatase domain. They bind c-Cbl
through the SH3 domain and to ubiquitin via UBA. In some
vertebrates, there are two TULA family proteins, called
UBASH3A (also called TULA or STS-2) and UBASH3B (also
called TULA-2 or STS-1), which show partly overlapping
as well as distinct functions. UBASH3B is widely
expressed while UBASH3A is only found in lymphoid cells.
UBASH3A facilitates apoptosis induced in T cells through
its interaction with the apoptosis-inducing factor AIF.
UBASH3B is an active phosphatase while UBASH3A is not.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 42.3 bits (100), Expect = 1e-05
Identities = 21/57 (36%), Positives = 24/57 (42%), Gaps = 8/57 (14%)
Query: 157 VQALYDFTPQEPGELEFRRGDVI----TVTDRSDQHWWHG---EIGARKGLFPATYI 206
++ LY +TPQE ELE GD I D S W G G GL P Y
Sbjct: 2 LRVLYPYTPQEEDELELVPGDYIYVSPEELDSSSDGWVEGTSWLTGCS-GLLPENYT 57
Score = 26.5 bits (59), Expect = 3.8
Identities = 15/53 (28%), Positives = 22/53 (41%), Gaps = 5/53 (9%)
Query: 7 HDFNATAEDELSFRKSQVLKILNMEDDMN---WYR--AELDGKEGLIPSNYIE 54
+ + EDEL + + E D + W + L G GL+P NY E
Sbjct: 6 YPYTPQEEDELELVPGDYIYVSPEELDSSSDGWVEGTSWLTGCSGLLPENYTE 58
Score = 26.5 bits (59), Expect = 4.0
Identities = 9/20 (45%), Positives = 12/20 (60%)
Query: 336 VQALYDFTPQEPGELEFRRD 355
++ LY +TPQE ELE
Sbjct: 2 LRVLYPYTPQEEDELELVPG 21
>gnl|CDD|212830 cd11897, SH3_SNX18, Src Homology 3 domain of Sorting nexin 18.
SNX18 is localized to peripheral endosomal structures,
and acts in a trafficking pathway that is
clathrin-independent but relies on AP-1 and PACS1. It
binds FIP5 and is required for apical lumen formation.
It may also play a role in axonal elongation. SNXs are
Phox homology (PX) domain containing proteins that are
involved in regulating membrane traffic and protein
sorting in the endosomal system. SNX18 also contains BAR
and SH3 domains. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 41.9 bits (98), Expect = 1e-05
Identities = 19/51 (37%), Positives = 31/51 (60%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGAR--KGLFPATYI 206
+ALYDF + PGE+ R +V+++ D W + +R +GLFPA+Y+
Sbjct: 3 RALYDFRSENPGEISLREHEVLSLCSEQDIEGWLEGVNSRGDRGLFPASYV 53
Score = 33.4 bits (76), Expect = 0.015
Identities = 17/54 (31%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRA-ELDGKEGLIPSNYIEM 55
A A +DF + E+S R+ +VL + + +D W G GL P++Y+E+
Sbjct: 2 ARALYDFRSENPGEISLREHEVLSLCSEQDIEGWLEGVNSRGDRGLFPASYVEV 55
>gnl|CDD|212868 cd11935, SH3_Nebulette_C, C-terminal Src Homology 3 domain of
Nebulette and LIM-nebulette (or Lasp2). Nebulette is a
cardiac-specific protein that localizes to the Z-disc.
It interacts with tropomyosin and is important in
stabilizing actin thin filaments in cardiac muscles.
Polymorphisms in the nebulette gene are associated with
dilated cardiomyopathy, with some mutations resulting in
severe heart failure. Nebulette is a 107kD protein that
contains an N-terminal acidic region, multiple nebulin
repeats, and a C-terminal SH3 domain. LIM-nebulette,
also called Lasp2 (LIM and SH3 domain protein 2), is an
alternatively spliced variant of nebulette. Although it
shares a gene with nebulette, Lasp2 is not transcribed
from a muscle-specific promoter, giving rise to its
multiple tissue expression pattern with highest amounts
in the brain. It can crosslink actin filaments and it
affects cell spreading. Lasp2 is a 34kD protein
containing an N-terminal LIM domain, three nebulin
repeats, and a C-terminal SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 41.9 bits (98), Expect = 1e-05
Identities = 19/51 (37%), Positives = 29/51 (56%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEI--GARKGLFPATYI 206
+A+YD++ Q+ E+ FR GD I D+ W +G + R G+ PA YI
Sbjct: 4 RAMYDYSAQDEDEVSFRDGDYIVNVQPIDEGWMYGTVQRTGRTGMLPANYI 54
Score = 36.5 bits (84), Expect = 0.001
Identities = 19/54 (35%), Positives = 31/54 (57%), Gaps = 1/54 (1%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWY-RAELDGKEGLIPSNYIEMKN 57
A +D++A EDE+SFR + + D+ Y + G+ G++P+NYIE N
Sbjct: 5 AMYDYSAQDEDEVSFRDGDYIVNVQPIDEGWMYGTVQRTGRTGMLPANYIEFVN 58
>gnl|CDD|198250 cd10387, SH2_SOCS6, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 100
Score = 42.9 bits (101), Expect = 1e-05
Identities = 26/77 (33%), Positives = 41/77 (53%), Gaps = 5/77 (6%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
WY+G ITR +AE L+N +G+FL+R S SLS + H ++ S+G+F
Sbjct: 12 WYWGPITRWEAEGKLANVPDGSFLVRDSSDDRYLLSLSFRSHGKTLHTRI-EHSNGRFSF 70
Query: 120 W----VVKFNSLNELVE 132
+ V S+ +L+E
Sbjct: 71 YEQPDVEGHTSIVDLIE 87
Score = 42.9 bits (101), Expect = 1e-05
Identities = 26/77 (33%), Positives = 41/77 (53%), Gaps = 5/77 (6%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
WY+G ITR +AE L+N +G+FL+R S SLS + H ++ S+G+F
Sbjct: 12 WYWGPITRWEAEGKLANVPDGSFLVRDSSDDRYLLSLSFRSHGKTLHTRI-EHSNGRFSF 70
Query: 299 W----VVKFNSLNELVE 311
+ V S+ +L+E
Sbjct: 71 YEQPDVEGHTSIVDLIE 87
>gnl|CDD|212950 cd12017, SH3_Tks_3, Third Src homology 3 domain of Tyrosine
kinase substrate (Tks) proteins. Tks proteins are Src
substrates and scaffolding proteins that play important
roles in the formation of podosomes and invadopodia,
the dynamic actin-rich structures that are related to
cell migration and cancer cell invasion. Vertebrates
contain two Tks proteins, Tks4 (Tyr kinase substrate
with four SH3 domains) and Tks5 (Tyr kinase substrate
with five SH3 domains), which display partially
overlapping but non-redundant functions. Both associate
with the ADAMs family of transmembrane
metalloproteases, which function as sheddases and
mediators of cell and matrix interactions. Tks5
interacts with N-WASP and Nck, while Tks4 is essential
for the localization of MT1-MMP (membrane-type 1 matrix
metalloproteinase) to invadopodia. Tks proteins contain
an N-terminal Phox homology (PX) domain and four or
five SH3 domains. This model characterizes the third
SH3 domain of Tks proteins. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 53
Score = 41.7 bits (98), Expect = 1e-05
Identities = 20/47 (42%), Positives = 32/47 (68%), Gaps = 1/47 (2%)
Query: 8 DFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
+F AT +D +SF+K Q +++++ WY ++DGKEG PS+YIE
Sbjct: 7 EFQATIQDGISFQKGQKVEVIDKNPSGWWY-VKIDGKEGWAPSSYIE 52
Score = 39.4 bits (92), Expect = 1e-04
Identities = 12/45 (26%), Positives = 25/45 (55%)
Query: 162 DFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+F + F++G + V D++ WW+ +I ++G P++YI
Sbjct: 7 EFQATIQDGISFQKGQKVEVIDKNPSGWWYVKIDGKEGWAPSSYI 51
>gnl|CDD|198279 cd10416, SH2_SH2D2A, Src homology 2 domain found in the SH2 domain
containing protein 2A (SH2D2A). SH2D2A contains a
single SH2 domain. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 102
Score = 43.1 bits (101), Expect = 1e-05
Identities = 22/57 (38%), Positives = 35/57 (61%), Gaps = 1/57 (1%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGK 116
W++G ITR +AERLL K +G +L+R SES+ F L+ + +HF + + G+
Sbjct: 9 WFHGFITRREAERLLEPKPQGCYLVRFSESAV-TFVLTYRSRTCCRHFLLAQLRDGR 64
Score = 43.1 bits (101), Expect = 1e-05
Identities = 22/57 (38%), Positives = 35/57 (61%), Gaps = 1/57 (1%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGK 295
W++G ITR +AERLL K +G +L+R SES+ F L+ + +HF + + G+
Sbjct: 9 WFHGFITRREAERLLEPKPQGCYLVRFSESAV-TFVLTYRSRTCCRHFLLAQLRDGR 64
>gnl|CDD|212717 cd11783, SH3_SH3RF_3, Third Src Homology 3 domain of SH3 domain
containing ring finger 1 (SH3RF1), SH3RF3, and similar
domains. SH3RF1 (or POSH) and SH3RF3 (or POSH2) are
scaffold proteins that function as E3 ubiquitin-protein
ligases. They contain an N-terminal RING finger domain
and four SH3 domains. This model represents the third
SH3 domain, located in the middle of SH3RF1 and SH3RF3,
and similar domains. SH3RF1 plays a role in calcium
homeostasis through the control of the ubiquitin domain
protein Herp. It may also have a role in regulating
death receptor mediated and JNK mediated apoptosis.
SH3RF3 interacts with p21-activated kinase 2 (PAK2) and
GTP-loaded Rac1. It may play a role in regulating JNK
mediated apoptosis in certain conditions. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 41.6 bits (98), Expect = 2e-05
Identities = 20/50 (40%), Positives = 31/50 (62%), Gaps = 2/50 (4%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGE--IGARKGLFPATYI 206
ALY + PQ+P ELE R+G++ TVT++ W+ G + G+FP Y+
Sbjct: 4 ALYPYKPQKPDELELRKGEMYTVTEKCQDGWFKGTSLRTGQSGVFPGNYV 53
>gnl|CDD|212937 cd12004, SH3_Lyn, Src homology 3 domain of Lyn Protein Tyrosine
Kinase. Lyn is a member of the Src subfamily of
proteins, which are cytoplasmic (or non-receptor) PTKs.
Lyn is expressed in B lymphocytes and myeloid cells. It
exhibits both positive and negative regulatory roles in
B cell receptor (BCR) signaling. Lyn, as well as Fyn
and Blk, promotes B cell activation by phosphorylating
ITAMs (immunoreceptor tyr activation motifs) in CD19
and in Ig components of BCR. It negatively regulates
signaling by its unique ability to phosphorylate ITIMs
(immunoreceptor tyr inhibition motifs) in cell surface
receptors like CD22 and CD5. Lyn also plays an
important role in G-CSF receptor signaling by
phosphorylating a variety of adaptor molecules. Src
kinases contain an N-terminal SH4 domain with a
myristoylation site, followed by SH3 and SH2 domains, a
tyr kinase domain, and a regulatory C-terminal region
containing a conserved tyr. They are activated by
autophosphorylation at the tyr kinase domain, but are
negatively regulated by phosphorylation at the
C-terminal tyr by Csk (C-terminal Src Kinase). The SH3
domain of Src kinases contributes to substrate
recruitment by binding adaptor proteins/substrates, and
regulation of kinase activity through an intramolecular
interaction. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 41.5 bits (97), Expect = 2e-05
Identities = 21/56 (37%), Positives = 34/56 (60%), Gaps = 4/56 (7%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAE--LDGKEGLIPSNYIEMKN 57
+A + ++ ED+LSF+K + LK++ E+ W++A KEG IPSNY+ N
Sbjct: 3 VALYPYDGIHEDDLSFKKGEKLKVI--EEHGEWWKARSLTTKKEGFIPSNYVAKVN 56
Score = 29.2 bits (65), Expect = 0.47
Identities = 22/83 (26%), Positives = 33/83 (39%), Gaps = 29/83 (34%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNW 215
+V ALY + +L F++G+ + V + HGE W
Sbjct: 1 IVVALYPYDGIHEDDLSFKKGEKLKVIEE------HGE---------------------W 33
Query: 216 YRAE--LDGKEGLIPSNYIEMKN 236
++A KEG IPSNY+ N
Sbjct: 34 WKARSLTTKKEGFIPSNYVAKVN 56
>gnl|CDD|212891 cd11958, SH3_RUSC1, Src homology 3 domain of RUN and SH3
domain-containing protein 1. RUSC1, also called NESCA
(New molecule containing SH3 at the carboxy-terminus),
is highly expressed in the brain and is translocated to
the nuclear membrane from the cytoplasm upon
stimulation with neurotrophin. It plays a role in
facilitating neurotrophin-dependent neurite outgrowth.
It also interacts with NEMO (or IKKgamma) and may
function in NEMO-mediated activation of NF-kB. RUSC
proteins are adaptor proteins consisting of RUN,
leucine zipper, and SH3 domains. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 51
Score = 41.4 bits (97), Expect = 2e-05
Identities = 17/42 (40%), Positives = 26/42 (61%), Gaps = 1/42 (2%)
Query: 11 ATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNY 52
A +E +LSFRK + L++L D+ +W R +EGL+P Y
Sbjct: 9 AGSESQLSFRKGEELQVLGTVDE-DWIRCRRGDREGLVPVGY 49
Score = 37.1 bits (86), Expect = 6e-04
Identities = 18/49 (36%), Positives = 25/49 (51%), Gaps = 1/49 (2%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATY 205
V+AL D E +L FR+G+ + V D+ W G R+GL P Y
Sbjct: 2 VRALCDHAGSE-SQLSFRKGEELQVLGTVDEDWIRCRRGDREGLVPVGY 49
>gnl|CDD|212789 cd11855, SH3_Sho1p, Src homology 3 domain of High osmolarity
signaling protein Sho1p. Sho1p (or Sho1), also called
SSU81 (Suppressor of SUA8-1 mutation), is a yeast
membrane protein that regulates adaptation to high salt
conditions by activating the HOG (high-osmolarity
glycerol) pathway. High salt concentrations lead to the
localization to the membrane of the MAPKK Pbs2, which
is then activated by the MAPKK Ste11 and in turn,
activates the MAPK Hog1. Pbs2 is localized to the
membrane though the interaction of its PxxP motif with
the SH3 domain of Sho1p. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 41.3 bits (97), Expect = 2e-05
Identities = 18/56 (32%), Positives = 36/56 (64%), Gaps = 5/56 (8%)
Query: 3 AIAKHDFNATAED--ELSFRKSQVLKILNMEDDMNWYRAEL-DGKEGLIPSNYIEM 55
A A + ++A+ +D ELSF K ++L++ + W++A +G+ G+ PSNY+++
Sbjct: 2 ARALYPYDASPDDPNELSFEKGEILEVSDTSG--KWWQARKSNGETGICPSNYLQL 55
Score = 38.9 bits (91), Expect = 1e-04
Identities = 23/80 (28%), Positives = 38/80 (47%), Gaps = 28/80 (35%)
Query: 157 VQALYDFT--PQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMN 214
+ALY + P +P EL F +G+++ V+D S + WW ARK
Sbjct: 2 ARALYPYDASPDDPNELSFEKGEILEVSDTSGK-WWQ----ARKS--------------- 41
Query: 215 WYRAELDGKEGLIPSNYIEM 234
+G+ G+ PSNY+++
Sbjct: 42 ------NGETGICPSNYLQL 55
>gnl|CDD|198285 cd10718, SH2_CIS, Src homology 2 (SH2) domain found in
cytokine-inducible SH2-containing protein (CIS). CIS
family members are known to be cytokine-inducible
negative regulators of cytokine signaling. The
expression of the CIS gene can be induced by IL2, IL3,
GM-CSF and EPO in hematopoietic cells.
Proteasome-mediated degradation of this protein has been
shown to be involved in the inactivation of the
erythropoietin receptor. Suppressor of cytokine
signalling (SOCS) was first recognized as a group of
cytokine-inducible SH2 (CIS) domain proteins comprising
eight family members in human (CIS and SOCS1-SOCS7). In
addition to the SH2 domain, SOCS proteins have a
variable N-terminal domain and a conserved SOCS box in
the C-terminal domain. SOCS proteins bind to a substrate
via their SH2 domain. The prototypical members, CIS and
SOCS1-SOCS3, have been shown to regulate growth hormone
signaling in vitro and in a classic negative feedback
response compete for binding at phosphotyrosine sites in
JAK kinase and receptor pathways to displace effector
proteins and target bound receptors for proteasomal
degradation. Loss of SOCS activity results in excessive
cytokine signaling associated with a variety of
hematopoietic, autoimmune, and inflammatory diseases and
certain cancers. In general SH2 domains are involved in
signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 88
Score = 42.1 bits (99), Expect = 2e-05
Identities = 22/60 (36%), Positives = 32/60 (53%), Gaps = 1/60 (1%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 119
WY+G IT ++A + L EG FL+R S +LSVK + G + ++ S G F L
Sbjct: 6 WYWGSITASEAHQALQKAPEGTFLVRDSSHPSYMLTLSVKTTRGPTNVRI-EYSDGSFRL 64
Score = 42.1 bits (99), Expect = 2e-05
Identities = 22/60 (36%), Positives = 32/60 (53%), Gaps = 1/60 (1%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFL 298
WY+G IT ++A + L EG FL+R S +LSVK + G + ++ S G F L
Sbjct: 6 WYWGSITASEAHQALQKAPEGTFLVRDSSHPSYMLTLSVKTTRGPTNVRI-EYSDGSFRL 64
>gnl|CDD|212792 cd11858, SH3_Myosin-I_fungi, Src homology 3 domain of Type I fungal
Myosins. Type I myosins (myosin-I) are actin-dependent
motors in endocytic actin structures and actin patches.
They play roles in membrane traffic in endocytic and
secretory pathways, cell motility, and mechanosensing.
Saccharomyces cerevisiae has two myosins-I, Myo3 and
Myo5, which are involved in endocytosis and the
polarization of the actin cytoskeleton. Myosin-I
contains an N-terminal actin-activated ATPase, a
phospholipid-binding TH1 (tail homology 1) domain, and a
C-terminal extension which includes an F-actin-binding
TH2 domain, an SH3 domain, and an acidic peptide that
participates in activating the Arp2/3complex. The SH3
domain of myosin-I is required for myosin-I-induced
actin polymerization. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 41.2 bits (97), Expect = 2e-05
Identities = 15/50 (30%), Positives = 26/50 (52%), Gaps = 2/50 (4%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEI--GARKGLFPATYI 206
ALYDF EL ++ D++ + + D WW + +++G PA Y+
Sbjct: 4 ALYDFAGSVANELSLKKDDIVYIVQKEDNGWWLAKKLDESKEGWVPAAYL 53
Score = 36.6 bits (85), Expect = 0.001
Identities = 19/51 (37%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDG-KEGLIPSNYIE 54
A +DF + +ELS +K ++ I+ ED+ W +LD KEG +P+ Y+E
Sbjct: 4 ALYDFAGSVANELSLKKDDIVYIVQKEDNGWWLAKKLDESKEGWVPAAYLE 54
>gnl|CDD|212699 cd11765, SH3_Nck_1, First Src Homology 3 domain of Nck adaptor
proteins. Nck adaptor proteins regulate actin
cytoskeleton dynamics by linking proline-rich effector
molecules to protein tyrosine kinases and
phosphorylated signaling intermediates. They contain
three SH3 domains and a C-terminal SH2 domain. They
function downstream of the PDGFbeta receptor and are
involved in Rho GTPase signaling and actin dynamics.
Vertebrates contain two Nck adaptor proteins: Nck1
(also called Nckalpha) and Nck2 (also called Nckbeta or
Growth factor receptor-bound protein 4, Grb4), which
show partly overlapping functions but also bind
distinct targets. Their SH3 domains are involved in
recruiting downstream effector molecules, such as the
N-WASP/Arp2/3 complex, which when activated induces
actin polymerization that results in the production of
pedestals, or protrusions of the plasma membrane. The
first SH3 domain of Nck proteins preferentially binds
the PxxDY sequence, which is present in the CD3e
cytoplasmic tail. This binding inhibits phosphorylation
by Src kinases, resulting in the downregulation of TCR
surface expression. SH3 domains are protein interaction
domains that usually bind to proline-rich ligands with
moderate affinity and selectivity, preferentially a
PxxP motif. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 51
Score = 40.9 bits (96), Expect = 2e-05
Identities = 17/52 (32%), Positives = 33/52 (63%), Gaps = 3/52 (5%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELD-GKEGLIPSNYI 53
+AK+D+ A + ELS +K++ L +L +D +W++ + + G +PSNY+
Sbjct: 2 VVAKYDYTAQGDQELSIKKNEKLTLL--DDSKHWWKVQNSSNQTGYVPSNYV 51
Score = 35.5 bits (82), Expect = 0.002
Identities = 17/52 (32%), Positives = 29/52 (55%), Gaps = 2/52 (3%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARK-GLFPATYI 206
V A YD+T Q EL ++ + +T+ D S +HWW + + + G P+ Y+
Sbjct: 1 YVVAKYDYTAQGDQELSIKKNEKLTLLDDS-KHWWKVQNSSNQTGYVPSNYV 51
>gnl|CDD|212938 cd12005, SH3_Lck, Src homology 3 domain of Lck Protein Tyrosine
Kinase. Lck is a member of the Src subfamily of
proteins, which are cytoplasmic (or non-receptor) PTKs.
Lck is expressed in T-cells and natural killer cells.
It plays a critical role in T-cell maturation,
activation, and T-cell receptor (TCR) signaling. Lck
phosphorylates ITAM (immunoreceptor tyr activation
motif) sequences on several subunits of TCRs, leading
to the activation of different second messenger
cascades. Phosphorylated ITAMs serve as binding sites
for other signaling factor such as Syk and ZAP-70,
leading to their activation and propagation of
downstream events. In addition, Lck regulates
drug-induced apoptosis by interfering with the
mitochondrial death pathway. The apototic role of Lck
is independent of its primary function in T-cell
signaling. Src kinases contain an N-terminal SH4 domain
with a myristoylation site, followed by SH3 and SH2
domains, a tyr kinase domain, and a regulatory
C-terminal region containing a conserved tyr. They are
activated by autophosphorylation at the tyr kinase
domain, but are negatively regulated by phosphorylation
at the C-terminal tyr by Csk (C-terminal Src Kinase).
The SH3 domain of Src kinases contributes to substrate
recruitment by binding adaptor proteins/substrates, and
regulation of kinase activity through an intramolecular
interaction. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 41.0 bits (96), Expect = 3e-05
Identities = 16/54 (29%), Positives = 30/54 (55%), Gaps = 4/54 (7%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAE--LDGKEGLIPSNYIEM 55
+A + + + + +L F K + L+IL E W++A+ G+EG IP N++
Sbjct: 3 VALYSYEPSHDGDLGFEKGEKLRIL--EQSGEWWKAQSLTTGQEGFIPFNFVAK 54
Score = 33.6 bits (77), Expect = 0.010
Identities = 19/81 (23%), Positives = 32/81 (39%), Gaps = 29/81 (35%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNW 215
LV ALY + P G+L F +G+ + + +E W
Sbjct: 1 LVVALYSYEPSHDGDLGFEKGEKLRI---------------------------LEQSGEW 33
Query: 216 YRAE--LDGKEGLIPSNYIEM 234
++A+ G+EG IP N++
Sbjct: 34 WKAQSLTTGQEGFIPFNFVAK 54
>gnl|CDD|212939 cd12006, SH3_Fyn_Yrk, Src homology 3 domain of Fyn and Yrk
Protein Tyrosine Kinases. Fyn and Yrk (Yes-related
kinase) are members of the Src subfamily of proteins,
which are cytoplasmic (or non-receptor) PTKs. Fyn,
together with Lck, plays a critical role in T-cell
signal transduction by phosphorylating ITAM
(immunoreceptor tyr activation motif) sequences on
T-cell receptors, ultimately leading to the
proliferation and differentiation of T-cells. In
addition, Fyn is involved in the myelination of
neurons, and is implicated in Alzheimer's and
Parkinson's diseases. Yrk has been detected only in
chickens. It is primarily found in neuronal and
epithelial cells and in macrophages. It may play a role
in inflammation and in response to injury. Src kinases
contain an N-terminal SH4 domain with a myristoylation
site, followed by SH3 and SH2 domains, a tyr kinase
domain, and a regulatory C-terminal region containing a
conserved tyr. They are activated by
autophosphorylation at the tyr kinase domain, but are
negatively regulated by phosphorylation at the
C-terminal tyr by Csk (C-terminal Src Kinase). The SH3
domain of Src kinases contributes to substrate
recruitment by binding adaptor proteins/substrates, and
regulation of kinase activity through an intramolecular
interaction. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 40.8 bits (95), Expect = 3e-05
Identities = 21/51 (41%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNW-YRAELDGKEGLIPSNYI 53
+A +D+ A ED+LSF K + +ILN + W R+ G+ G IPSNY+
Sbjct: 4 VALYDYEARTEDDLSFHKGEKFQILNSSEGDWWEARSLTTGETGYIPSNYV 54
Score = 32.3 bits (73), Expect = 0.032
Identities = 19/77 (24%), Positives = 30/77 (38%), Gaps = 24/77 (31%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNW 215
L ALYD+ + +L F +G+ + + S+ WW
Sbjct: 2 LFVALYDYEARTEDDLSFHKGEKFQILNSSEGDWWEA----------------------- 38
Query: 216 YRAELDGKEGLIPSNYI 232
R+ G+ G IPSNY+
Sbjct: 39 -RSLTTGETGYIPSNYV 54
>gnl|CDD|212887 cd11954, SH3_ASPP1, Src Homology 3 domain of Apoptosis Stimulating
of p53 protein 1. ASPP1, like ASPP2, activates the
apoptotic function of the p53 family of tumor
suppressors (p53, p63, and p73). In addition, it
functions in the cytoplasm to regulate the nuclear
localization of the transcriptional cofactors YAP and
TAZ by inihibiting their phosphorylation; YAP and TAZ
are important regulators of cell expansion,
differentiation, migration, and invasion. ASPP1 is
downregulated in breast tumors expressing wild-type p53.
It contains a proline-rich region, four ankyrin (ANK)
repeats, and an SH3 domain at its C-terminal half. The
SH3 domain and the ANK repeats of ASPP1 contribute to
the p53 binding site; they bind to the DNA binding
domain of p53. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 40.8 bits (95), Expect = 3e-05
Identities = 18/50 (36%), Positives = 26/50 (52%), Gaps = 3/50 (6%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQ---HWWHGEIGARKGLFP 202
+V AL+D+ Q EL F+ GD IT+ R D WW + ++G P
Sbjct: 2 MVYALWDYEAQNADELSFQEGDAITILRRKDDSETEWWWARLNDKEGYVP 51
Score = 38.5 bits (89), Expect = 3e-04
Identities = 19/48 (39%), Positives = 28/48 (58%), Gaps = 2/48 (4%)
Query: 8 DFNATAEDELSFRKSQVLKILNMEDDM--NWYRAELDGKEGLIPSNYI 53
D+ A DELSF++ + IL +DD W+ A L+ KEG +P N +
Sbjct: 8 DYEAQNADELSFQEGDAITILRRKDDSETEWWWARLNDKEGYVPKNLL 55
>gnl|CDD|212796 cd11862, SH3_MPP, Src Homology 3 domain of Membrane Protein,
Palmitoylated (or MAGUK p55 subfamily member) proteins.
The MPP/p55 subfamily of MAGUK (membrane-associated
guanylate kinase) proteins includes at least eight
vertebrate members (MPP1-7 and CASK), four Drosophila
proteins (Stardust, Varicose, CASK and Skiff), and other
similar proteins; they all contain one each of the core
of three domains characteristic of MAGUK proteins: PDZ,
SH3, and guanylate kinase (GuK). In addition, most
members except for MPP1 contain N-terminal L27 domains
and some also contain a Hook (Protein 4.1 Binding) motif
in between the SH3 and GuK domains. CASK has an
additional calmodulin-dependent kinase (CaMK)-like
domain at the N-terminus. Members of this subfamily are
scaffolding proteins that play important roles in
regulating and establishing cell polarity, cell
adhesion, and synaptic targeting and transmission, among
others. The GuK domain in MAGUK proteins is
enzymatically inactive; instead, the domain mediates
protein-protein interactions and associates
intramolecularly with the SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 61
Score = 40.6 bits (96), Expect = 4e-05
Identities = 19/59 (32%), Positives = 33/59 (55%), Gaps = 13/59 (22%)
Query: 157 VQALYDFTP--------QEPGELEFRRGDVITVTDRSDQHWW----HGEIGARKGLFPA 203
V+AL+D+ P +E G L F++GD++ + ++ D +WW G+ R GL P+
Sbjct: 2 VRALFDYDPEEDPLIPCKEAG-LSFKKGDILQIVNQDDPNWWQARKVGDPNGRAGLIPS 59
Score = 39.1 bits (92), Expect = 2e-04
Identities = 18/38 (47%), Positives = 27/38 (71%), Gaps = 5/38 (13%)
Query: 17 LSFRKSQVLKILNMEDDMNWYRA----ELDGKEGLIPS 50
LSF+K +L+I+N DD NW++A + +G+ GLIPS
Sbjct: 23 LSFKKGDILQIVNQ-DDPNWWQARKVGDPNGRAGLIPS 59
>gnl|CDD|212888 cd11955, SH3_srGAP1-3, Src homology 3 domain of Slit-Robo GTPase
Activating Proteins 1, 2, and 3. srGAP1, also called
Rho GTPase-Activating Protein 13 (ARHGAP13), is a
Cdc42- and RhoA-specific GAP and is expressed later in
the development of central nervous system tissues.
srGAP2 is expressed in zones of neuronal
differentiation. It plays a role in the regeneration of
neurons and axons. srGAP3, also called MEGAP (MEntal
disorder associated GTPase-Activating Protein), is a
Rho GAP with activity towards Rac1 and Cdc42. It
impacts cell migration by regulating actin and
microtubule cytoskeletal dynamics. The association
between srGAP3 haploinsufficiency and mental
retardation is under debate. srGAPs are Rho GAPs that
interact with Robo1, the transmembrane receptor of Slit
proteins. Slit proteins are secreted proteins that
control axon guidance and the migration of neurons and
leukocytes. srGAPs contain an N-terminal F-BAR domain,
a Rho GAP domain, and a C-terminal SH3 domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 40.7 bits (95), Expect = 4e-05
Identities = 20/52 (38%), Positives = 30/52 (57%), Gaps = 1/52 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
EAIAK D+ + ELSF+K L + + D +W+ +G +GL+P YI
Sbjct: 1 EAIAKFDYVGRSARELSFKKGASLLLYHRASD-DWWEGRHNGIDGLVPHQYI 51
Score = 38.0 bits (88), Expect = 3e-04
Identities = 15/49 (30%), Positives = 24/49 (48%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYIL 207
A +D+ + EL F++G + + R+ WW G GL P YI+
Sbjct: 4 AKFDYVGRSARELSFKKGASLLLYHRASDDWWEGRHNGIDGLVPHQYIV 52
>gnl|CDD|212749 cd11815, SH3_Eve1_2, Second Src homology 3 domain of ADAM-binding
protein Eve-1. Eve-1, also called SH3 domain-containing
protein 19 (SH3D19) or EEN-binding protein (EBP), exists
in multiple alternatively spliced isoforms. The longest
isoform contains five SH3 domain in the C-terminal
region and seven proline-rich motifs in the N-terminal
region. It is abundantly expressed in skeletal muscle
and heart, and may be involved in regulating the
activity of ADAMs (A disintegrin and metalloproteases).
Eve-1 interacts with EEN, an endophilin involved in
endocytosis and may be the target of the MLL-EEN fusion
protein that is implicated in leukemogenesis. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 40.2 bits (94), Expect = 4e-05
Identities = 12/47 (25%), Positives = 26/47 (55%)
Query: 160 LYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
L+DF + +L G+++ + ++ D W+ G+ G+FPA ++
Sbjct: 5 LHDFPAEHSDDLSLNSGEIVYLLEKIDTEWYRGKCKNTTGIFPANHV 51
Score = 38.3 bits (89), Expect = 3e-04
Identities = 16/52 (30%), Positives = 29/52 (55%), Gaps = 1/52 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A+ HDF A D+LS +++ +L + D WYR + G+ P+N+++
Sbjct: 2 AVVLHDFPAEHSDDLSLNSGEIVYLLE-KIDTEWYRGKCKNTTGIFPANHVK 52
Score = 28.3 bits (63), Expect = 0.89
Identities = 7/22 (31%), Positives = 13/22 (59%)
Query: 212 DMNWYRAELDGKEGLIPSNYIE 233
D WYR + G+ P+N+++
Sbjct: 31 DTEWYRGKCKNTTGIFPANHVK 52
>gnl|CDD|212885 cd11952, SH3_iASPP, Src Homology 3 (SH3) domain of Inhibitor of
ASPP protein (iASPP). iASPP, also called
RelA-associated inhibitor (RAI), is an oncoprotein that
inhibits the apoptotic transactivation potential of
p53. It is upregulated in human breast cancers
expressing wild-type p53, in acute leukemias regardless
of the p53 mutation status, as well as in ovarian
cancer where it is associated with poor patient outcome
and chemoresistance. iASPP is also a binding partner
and negative regulator of p65RelA, which promotes cell
proliferation and inhibits apoptosis; p65RelA has the
opposite effect on cell growth compared to the p53
family. It contains a proline-rich region, four ankyrin
(ANK) repeats, and an SH3 domain at its C-terminal
half. The SH3 domain and the ANK repeats of iASPP
contribute to the p53 binding site; they bind to the
DNA binding domain of p53. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 56
Score = 40.3 bits (94), Expect = 5e-05
Identities = 17/46 (36%), Positives = 30/46 (65%), Gaps = 1/46 (2%)
Query: 8 DFNATAEDELSFRKSQVLKILNME-DDMNWYRAELDGKEGLIPSNY 52
D++A DELSF++ ++ +L + + +W+ A L G+EG +P NY
Sbjct: 8 DYSAEFPDELSFKEGDMVTVLRKDGEGTDWWWASLCGREGYVPRNY 53
Score = 39.9 bits (93), Expect = 6e-05
Identities = 19/51 (37%), Positives = 28/51 (54%), Gaps = 2/51 (3%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITV--TDRSDQHWWHGEIGARKGLFPATY 205
V AL+D++ + P EL F+ GD++TV D WW + R+G P Y
Sbjct: 3 VYALWDYSAEFPDELSFKEGDMVTVLRKDGEGTDWWWASLCGREGYVPRNY 53
>gnl|CDD|212863 cd11930, SH3_SH3RF1_2, Second Src Homology 3 domain of SH3 domain
containing ring finger protein 1, an E3
ubiquitin-protein ligase. SH3RF1 is also called POSH
(Plenty of SH3s) or SH3MD2 (SH3 multiple domains protein
2). It is a scaffold protein that acts as an E3
ubiquitin-protein ligase. It plays a role in calcium
homeostasis through the control of the ubiquitin domain
protein Herp. It may also have a role in regulating
death receptor mediated and JNK mediated apoptosis.
SH3RF1 also enhances the ubiquitination of ROMK1
potassium channel resulting in its increased
endocytosis. It contains an N-terminal RING finger
domain and four SH3 domains. This model represents the
second SH3 domain, located C-terminal of the first SH3
domain at the N-terminal half, of SH3RF1. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 40.4 bits (94), Expect = 5e-05
Identities = 19/53 (35%), Positives = 32/53 (60%), Gaps = 4/53 (7%)
Query: 158 QALYDFTPQEPGE----LEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ALYDF ++ L F + D++TV R D++W G +G + G+FP +Y+
Sbjct: 3 KALYDFEVKDKEADKDCLPFAKDDILTVIRRVDENWAEGMLGDKIGIFPISYV 55
>gnl|CDD|198181 cd09927, SH2_Tensin_like, Src homology 2 domain found in
Tensin-like proteins. SH2 domain found in Tensin-like
proteins. The Tensins are a family of intracellular
proteins that interact with receptor tyrosine kinases
(RTKs), integrins, and actin. They are thought act as
signaling bridges between the extracellular space and
the cytoskeleton. There are four homologues: Tensin1,
Tensin2 (TENC1, C1-TEN), Tensin3 and Tensin4 (cten), all
of which contain a C-terminal tandem SH2-PTB domain
pairing, as well as actin-binding regions that may
localize them to focal adhesions. The isoforms of
Tensin2 and Tensin3 contain N-terminal C1 domains, which
are atypical and not expected to bind to phorbol esters.
Tensins 1-3 contain a phosphatase (PTPase) and C2 domain
pairing which resembles PTEN (phosphatase and tensin
homologue deleted on chromosome 10) protein. PTEN is a
lipid phosphatase that dephosphorylates
phosphatidylinositol 3,4,5-trisphosphate
(PtdIns(3,4,5)P3) to yield phosphatidylinositol
4,5-bisphosphate (PtdIns(4,5)P2). As PtdIns(3,4,5)P3 is
the product of phosphatidylinositol 3-kinase (PI3K)
activity, PTEN is therefore a key negative regulator of
the PI3K pathway. Because of their PTEN-like domains,
the Tensins may also possess phosphoinositide-binding or
phosphatase capabilities. However, only Tensin2 and
Tensin3 have the potential to be phosphatases since only
their PTPase domains contain a cysteine residue that is
essential for catalytic activity. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 116
Score = 41.6 bits (98), Expect = 6e-05
Identities = 17/42 (40%), Positives = 24/42 (57%)
Query: 60 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCS 101
WY I+R A LL +K G FL+R S + G + L+VK +
Sbjct: 5 WYKPNISRDQAIALLKDKPPGTFLVRDSTTYKGAYGLAVKVA 46
Score = 41.6 bits (98), Expect = 6e-05
Identities = 17/42 (40%), Positives = 24/42 (57%)
Query: 239 WYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCS 280
WY I+R A LL +K G FL+R S + G + L+VK +
Sbjct: 5 WYKPNISRDQAIALLKDKPPGTFLVRDSTTYKGAYGLAVKVA 46
>gnl|CDD|212886 cd11953, SH3_ASPP2, Src Homology 3 (SH3) domain of Apoptosis
Stimulating of p53 protein 2. ASPP2 is the full length
form of the previously-identified tumor supressor,
p53-binding protein 2 (p53BP2). ASPP2 activates the
apoptotic function of the p53 family of tumor
suppressors (p53, p63, and p73). It plays a central role
in regulating apoptosis and cell growth; ASPP2-deficient
mice show postnatal death. Downregulated expression of
ASPP2 is frequently found in breast tumors, lung cancer,
and diffuse large B-cell lymphoma where it is correlated
with a poor clinical outcome. ASPP2 contains a
proline-rich region, four ankyrin (ANK) repeats, and an
SH3 domain at its C-terminal half. The SH3 domain and
the ANK repeats of ASPP2 contribute to the p53 binding
site; they bind to the DNA binding domain of p53. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 40.3 bits (94), Expect = 6e-05
Identities = 22/75 (29%), Positives = 33/75 (44%), Gaps = 23/75 (30%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNW 215
+V AL+D+ + EL F+ GD +T+ R D ED+ W
Sbjct: 2 VVYALWDYEGESDDELSFKEGDCMTILRRED-----------------------EDETEW 38
Query: 216 YRAELDGKEGLIPSN 230
+ A L+ KEG +P N
Sbjct: 39 WWARLNDKEGYVPRN 53
Score = 36.5 bits (84), Expect = 0.001
Identities = 18/46 (39%), Positives = 28/46 (60%), Gaps = 2/46 (4%)
Query: 8 DFNATAEDELSFRKSQVLKILNMED--DMNWYRAELDGKEGLIPSN 51
D+ ++DELSF++ + IL ED + W+ A L+ KEG +P N
Sbjct: 8 DYEGESDDELSFKEGDCMTILRREDEDETEWWWARLNDKEGYVPRN 53
>gnl|CDD|212812 cd11879, SH3_Bem1p_2, Second Src Homology 3 domain of Bud emergence
protein 1 and similar domains. Members of this
subfamily bear similarity to Saccharomyces cerevisiae
Bem1p, containing two Src Homology 3 (SH3) domains at
the N-terminus, a central PX domain, and a C-terminal
PB1 domain. Bem1p is a scaffolding protein that is
critical for proper Cdc42p activation during bud
formation in yeast. During budding and mating, Bem1p
migrates to the plasma membrane where it can serve as an
adaptor for Cdc42p and some other proteins. Bem1p also
functions as an effector of the G1 cyclin Cln3p and the
cyclin-dependent kinase Cdc28p in promoting vacuolar
fusion. SH3 domains bind to proline-rich ligands with
moderate affinity and selectivity, preferentially to
PxxP motifs; they play a role in the regulation of
enzymes by intramolecular interactions, changing the
subcellular localization of signal pathway components
and mediate multiprotein complex assemblies.
Length = 56
Score = 40.0 bits (94), Expect = 6e-05
Identities = 17/51 (33%), Positives = 27/51 (52%), Gaps = 5/51 (9%)
Query: 160 LYDFTPQEPGELEFRRGDVITVTDRSDQHWW----HGEIGARKGLFPATYI 206
LYDF + P EL+ + GD I + S+ W+ G +G GL P +++
Sbjct: 5 LYDFKAERPDELDAKAGDAIIICAHSNYEWFVAKPIGRLG-GPGLIPVSFV 54
Score = 32.7 bits (75), Expect = 0.021
Identities = 16/56 (28%), Positives = 25/56 (44%), Gaps = 4/56 (7%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRA---ELDGKEGLIPSNYIEM 55
I +DF A DEL + + I + W+ A G GLIP +++E+
Sbjct: 2 GIVLYDFKAERPDELDAKAGDAIIICAHSNY-EWFVAKPIGRLGGPGLIPVSFVEI 56
>gnl|CDD|212827 cd11894, SH3_FCHSD2_2, Second Src Homology 3 domain of FCH and
double SH3 domains protein 2. FCHSD2 has a domain
structure consisting of an N-terminal F-BAR (FES-CIP4
Homology and Bin/Amphiphysin/Rvs), two SH3, and
C-terminal proline-rich domains. It has only been
characterized in silico and its function is unknown. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 56
Score = 39.9 bits (93), Expect = 6e-05
Identities = 19/53 (35%), Positives = 30/53 (56%), Gaps = 3/53 (5%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQH---WWHGEIGARKGLFPATYI 206
V+ALYD+ Q EL F G +I + ++ +Q +W GE R G+FP+ +
Sbjct: 2 VKALYDYEGQTDDELSFPEGAIIRILNKENQDDDGFWEGEFNGRIGVFPSVLV 54
Score = 38.4 bits (89), Expect = 2e-04
Identities = 19/52 (36%), Positives = 32/52 (61%), Gaps = 2/52 (3%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNME--DDMNWYRAELDGKEGLIPSNYIE 54
A +D+ +DELSF + +++ILN E DD ++ E +G+ G+ PS +E
Sbjct: 4 ALYDYEGQTDDELSFPEGAIIRILNKENQDDDGFWEGEFNGRIGVFPSVLVE 55
>gnl|CDD|212841 cd11908, SH3_ITK, Src Homology 3 domain of Interleukin-2-inducible
T-cell Kinase. ITK (also known as Tsk or Emt) is a
cytoplasmic (or nonreceptor) tyr kinase containing Src
homology protein interaction domains (SH3, SH2)
N-terminal to the catalytic tyr kinase domain. It also
contains an N-terminal pleckstrin homology (PH) domain,
which binds the products of PI3K and allows membrane
recruitment and activation, and the Tec homology (TH)
domain, which contains proline-rich and zinc-binding
regions. ITK is expressed in T-cells and mast cells, and
is important in their development and differentiation.
Of the three Tec kinases expressed in T-cells, ITK plays
the predominant role in T-cell receptor (TCR) signaling.
It is activated by phosphorylation upon TCR crosslinking
and is involved in the pathway resulting in
phospholipase C-gamma1 activation and actin
polymerization. It also plays a role in the downstream
signaling of the T-cell costimulatory receptor CD28, the
T-cell surface receptor CD2, and the chemokine receptor
CXCR4. In addition, ITK is crucial for the development
of T-helper(Th)2 effector responses. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 40.0 bits (93), Expect = 6e-05
Identities = 18/52 (34%), Positives = 28/52 (53%), Gaps = 1/52 (1%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWH-GEIGARKGLFPATYI 206
LV ALYD+ +P EL R + + D S+ HWW + +G P++Y+
Sbjct: 2 LVIALYDYQTNDPQELALRYNEEYHLLDSSEIHWWRVQDKNGHEGYVPSSYL 53
Score = 29.6 bits (66), Expect = 0.30
Identities = 15/53 (28%), Positives = 28/53 (52%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEMK 56
IA +D+ EL+ R ++ +L+ + W + +G EG +PS+Y+ K
Sbjct: 4 IALYDYQTNDPQELALRYNEEYHLLDSSEIHWWRVQDKNGHEGYVPSSYLVEK 56
Score = 26.5 bits (58), Expect = 4.8
Identities = 10/21 (47%), Positives = 13/21 (61%)
Query: 335 LVQALYDFTPQEPGELEFRRD 355
LV ALYD+ +P EL R +
Sbjct: 2 LVIALYDYQTNDPQELALRYN 22
>gnl|CDD|212858 cd11925, SH3_SH3RF3_3, Third Src Homology 3 domain of SH3 domain
containing ring finger 3, an E3 ubiquitin-protein
ligase. SH3RF3 is also called POSH2 (Plenty of SH3s 2)
or SH3MD4 (SH3 multiple domains protein 4). It is a
scaffold protein with E3 ubiquitin-protein ligase
activity. It was identified in the screen for
interacting partners of p21-activated kinase 2 (PAK2).
It may play a role in regulating JNK mediated apoptosis
in certain conditions. It also interacts with GTP-loaded
Rac1. SH3RF3 is highly homologous to SH3RF1; it also
contains an N-terminal RING finger domain and four SH3
domains. This model represents the third SH3 domain,
located in the middle, of SH3RF3. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 57
Score = 40.0 bits (93), Expect = 6e-05
Identities = 17/50 (34%), Positives = 27/50 (54%), Gaps = 2/50 (4%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEI--GARKGLFPATYI 206
ALY + PQ+ ELE R+G++ V ++ W+ G G+FP Y+
Sbjct: 5 ALYAYKPQKNDELELRKGEMYRVIEKCQDGWFKGTSLRTGVSGVFPGNYV 54
>gnl|CDD|212818 cd11885, SH3_SH3TC, Src Homology 3 domain of SH3 domain and
tetratricopeptide repeat-containing (SH3TC) proteins and
similar domains. This subfamily is composed of
vertebrate SH3TC proteins and hypothetical fungal
proteins containing BAR and SH3 domains. Mammals contain
two SH3TC proteins, SH3TC1 and SH3TC2. The function of
SH3TC1 is unknown. SH3TC2 is localized in Schwann cells
in the peripheral nervous system, where it interacts
with Rab11 and plays a role in peripheral nerve
myelination. Mutations in SH3TC2 are associated with
Charcot-Marie-Tooth disease type 4C, a severe hereditary
peripheral neuropathy with symptoms that include
progressive scoliosis, delayed age of walking, muscular
atrophy, distal weakness, and reduced nerve conduction
velocity. SH3 domains bind to proline-rich ligands with
moderate affinity and selectivity, preferentially to
PxxP motifs; they play a role in the regulation of
enzymes by intramolecular interactions, changing the
subcellular localization of signal pathway components
and mediate multiprotein complex assemblies.
Length = 55
Score = 40.0 bits (94), Expect = 7e-05
Identities = 20/79 (25%), Positives = 32/79 (40%), Gaps = 26/79 (32%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNW 215
A DF EPGEL FR+GD I + I ++ + W
Sbjct: 1 SCTAKMDFEGVEPGELSFRQGDSIEI------------------------IGDLIPGLQW 36
Query: 216 Y--RAELDGKEGLIPSNYI 232
+ R++ G+ G +P+N+
Sbjct: 37 FVGRSKSSGRVGFVPTNHF 55
Score = 39.6 bits (93), Expect = 8e-05
Identities = 16/52 (30%), Positives = 30/52 (57%), Gaps = 3/52 (5%)
Query: 5 AKHDFNATAEDELSFRKSQVLKIL-NMEDDMNWY--RAELDGKEGLIPSNYI 53
AK DF ELSFR+ ++I+ ++ + W+ R++ G+ G +P+N+
Sbjct: 4 AKMDFEGVEPGELSFRQGDSIEIIGDLIPGLQWFVGRSKSSGRVGFVPTNHF 55
Score = 26.5 bits (59), Expect = 3.8
Identities = 10/19 (52%), Positives = 10/19 (52%)
Query: 335 LVQALYDFTPQEPGELEFR 353
A DF EPGEL FR
Sbjct: 1 SCTAKMDFEGVEPGELSFR 19
>gnl|CDD|198274 cd10411, SH2_SH2B2, Src homology 2 (SH2) domain found in SH2B
adapter proteins (SH2B1, SH2B2, SH2B3). SH2B2 (APS),
like other members of the SH2B adapter protein family,
contains a pleckstrin homology domain, at least one
dimerization domain, and a C-terminal SH2 domain which
binds to phosphorylated tyrosines in a variety of
tyrosine kinases. SH2B1 and SH2B2 function in signaling
pathways found downstream of growth hormone receptor and
receptor tyrosine kinases, including the insulin,
insulin-like growth factor-I (IGF-I), platelet-derived
growth factor (PDGF), nerve growth factor, hepatocyte
growth factor, and fibroblast growth factor receptors.
SH2B2beta, a new isoform of SH2B2, is an endogenous
inhibitor of SH2B1 and/or SH2B2 (SH2B2alpha), negatively
regulating insulin signaling and/or JAK2-mediated
cellular responses. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 97
Score = 41.1 bits (96), Expect = 8e-05
Identities = 20/87 (22%), Positives = 48/87 (55%), Gaps = 3/87 (3%)
Query: 53 IEMKNHDWYYGRITRADAERLL---SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKV 109
+E+ ++ W++G ++R A +L+ + G F+IR SE+ PG++ L+ +H ++
Sbjct: 3 LELSDYPWFHGTLSRVKAAQLVLAGGPRSHGLFVIRQSETRPGEYVLTFNFQGKAKHLRL 62
Query: 110 LRDSSGKFFLWVVKFNSLNELVEYHRT 136
+ G+ + + F S+ +++ + T
Sbjct: 63 SLNGHGQCHVQHLWFQSVFDMLRHFHT 89
Score = 41.1 bits (96), Expect = 8e-05
Identities = 20/87 (22%), Positives = 48/87 (55%), Gaps = 3/87 (3%)
Query: 232 IEMKNHDWYYGRITRADAERLL---SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKV 288
+E+ ++ W++G ++R A +L+ + G F+IR SE+ PG++ L+ +H ++
Sbjct: 3 LELSDYPWFHGTLSRVKAAQLVLAGGPRSHGLFVIRQSETRPGEYVLTFNFQGKAKHLRL 62
Query: 289 LRDSSGKFFLWVVKFNSLNELVEYHRT 315
+ G+ + + F S+ +++ + T
Sbjct: 63 SLNGHGQCHVQHLWFQSVFDMLRHFHT 89
>gnl|CDD|212819 cd11886, SH3_BOI, Src Homology 3 domain of fungal BOI-like
proteins. This subfamily includes the Saccharomyces
cerevisiae proteins BOI1 and BOI2, and similar
proteins. They contain an N-terminal SH3 domain, a
Sterile alpha motif (SAM), and a Pleckstrin homology
(PH) domain at the C-terminus. BOI1 and BOI2 interact
with the SH3 domain of Bem1p, a protein involved in bud
formation. They promote polarized cell growth and
participates in the NoCut signaling pathway, which is
involved in the control of cytokinesis. SH3 domains
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs; they play a
role in the regulation of enzymes by intramolecular
interactions, changing the subcellular localization of
signal pathway components and mediate multiprotein
complex assemblies.
Length = 55
Score = 39.6 bits (93), Expect = 8e-05
Identities = 17/53 (32%), Positives = 29/53 (54%), Gaps = 4/53 (7%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMN--WY--RAELDGKEGLIPSNY 52
I HDFNA +EDEL+ + ++++ +++ WY R G+ GL P +
Sbjct: 3 IVIHDFNARSEDELTLKPGDKIELIEDDEEFGDGWYLGRNLRTGETGLFPVVF 55
Score = 30.8 bits (70), Expect = 0.11
Identities = 14/55 (25%), Positives = 25/55 (45%), Gaps = 5/55 (9%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQH---WWHGE--IGARKGLFPATY 205
L+ ++DF + EL + GD I + + ++ W+ G GLFP +
Sbjct: 1 LLIVIHDFNARSEDELTLKPGDKIELIEDDEEFGDGWYLGRNLRTGETGLFPVVF 55
>gnl|CDD|212967 cd12034, SH3_MPP4, Src Homology 3 domain of Membrane Protein,
Palmitoylated 4 (or MAGUK p55 subfamily member 4).
MPP4, also called Disks Large homolog 6 (DLG6) or
Amyotrophic lateral sclerosis 2 chromosomal region
candidate gene 5 protein (ALS2CR5), is a retina-specific
scaffolding protein that plays a role in organizing
presynaptic protein complexes in the photoreceptor
synapse, where it localizes to the plasma membrane. It
is required in the proper localization of calcium
ATPases and for maintenance of calcium homeostasis. MPP4
is one of seven vertebrate homologs of the Drosophila
Stardust protein, which is required in establishing cell
polarity, and it contains two L27 domains followed by
the core of three domains characteristic of MAGUK
(membrane-associated guanylate kinase) proteins: PDZ,
SH3, and guanylate kinase (GuK). The GuK domain in MAGUK
proteins is enzymatically inactive; instead, the domain
mediates protein-protein interactions and associates
intramolecularly with the SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 61
Score = 39.9 bits (93), Expect = 8e-05
Identities = 18/60 (30%), Positives = 32/60 (53%), Gaps = 11/60 (18%)
Query: 157 VQALYDFTPQEPGE-------LEFRRGDVITVTDRSDQHWWHG----EIGARKGLFPATY 205
V+A+ D+ PQ+ L FR+GD++ + D++D WW ++ A GL P+ +
Sbjct: 2 VRAMVDYWPQQDPSIPCADAGLPFRKGDILQIVDQNDSLWWQARKLSDLAACAGLIPSNH 61
Score = 27.6 bits (61), Expect = 1.8
Identities = 16/40 (40%), Positives = 25/40 (62%), Gaps = 5/40 (12%)
Query: 17 LSFRKSQVLKILNMEDDMNWYRA----ELDGKEGLIPSNY 52
L FRK +L+I++ D + W++A +L GLIPSN+
Sbjct: 23 LPFRKGDILQIVDQNDSL-WWQARKLSDLAACAGLIPSNH 61
>gnl|CDD|212851 cd11918, SH3_Vinexin_3, Third (or C-terminal) Src Homology 3 domain
of Vinexin, also called Sorbin and SH3 domain containing
3 (Sorbs3). Vinexin is also called Sorbs3, SH3P3, and
SH3-containing adapter molecule 1 (SCAM-1). It is an
adaptor protein containing one sorbin homology (SoHo)
and three SH3 domains. Vinexin was first identified as a
vinculin binding protein; it is co-localized with
vinculin at cell-ECM and cell-cell adhesion sites. There
are several splice variants of vinexin: alpha, which
contains the SoHo and three SH3 domains and displays
tissue-specific expression; and beta, which contains
only the three SH3 domains and is widely expressed.
Vinexin alpha stimulates the accumulation of F-actin at
focal contact sites. Vinexin also promotes keratinocyte
migration and wound healing. The SH3 domains of vinexin
have been reported to bind a number of ligands including
vinculin, WAVE2, DLG5, Abl, and Cbl. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 39.6 bits (92), Expect = 9e-05
Identities = 18/51 (35%), Positives = 26/51 (50%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHG--EIGARKGLFPATYI 206
+A+Y + PQ ELE R GD + V + D W+ G + G FP Y+
Sbjct: 5 KAVYQYRPQNEDELELREGDRVDVMQQCDDGWFVGVSRRTQKFGTFPGNYV 55
>gnl|CDD|212941 cd12008, SH3_Src, Src homology 3 domain of Src Protein Tyrosine
Kinase. Src (or c-Src) is a cytoplasmic (or
non-receptor) PTK and is the vertebrate homolog of the
oncogenic protein (v-Src) from Rous sarcoma virus.
Together with other Src subfamily proteins, it is
involved in signaling pathways that regulate cytokine
and growth factor responses, cytoskeleton dynamics,
cell proliferation, survival, and differentiation. Src
also play a role in regulating cell adhesion, invasion,
and motility in cancer cells, and tumor vasculature,
contributing to cancer progression and metastasis.
Elevated levels of Src kinase activity have been
reported in a variety of human cancers. Several
inhibitors of Src have been developed as anti-cancer
drugs. Src is also implicated in acute inflammatory
responses and osteoclast function. Src kinases contain
an N-terminal SH4 domain with a myristoylation site,
followed by SH3 and SH2 domains, a tyr kinase domain,
and a regulatory C-terminal region containing a
conserved tyr. They are activated by
autophosphorylation at the tyr kinase domain, but are
negatively regulated by phosphorylation at the
C-terminal tyr by Csk (C-terminal Src Kinase). The SH3
domain of Src kinases contributes to substrate
recruitment by binding adaptor proteins/substrates, and
regulation of kinase activity through an intramolecular
interaction. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 39.7 bits (92), Expect = 9e-05
Identities = 19/51 (37%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELD-GKEGLIPSNYI 53
+A +D+ + E +LSF+K + L+I+N + W L G+ G IPSNY+
Sbjct: 3 VALYDYESRTETDLSFKKGERLQIVNNTEGDWWLAHSLTTGQTGYIPSNYV 53
Score = 33.5 bits (76), Expect = 0.015
Identities = 13/50 (26%), Positives = 27/50 (54%), Gaps = 2/50 (4%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWW--HGEIGARKGLFPATYI 206
ALYD+ + +L F++G+ + + + ++ WW H + G P+ Y+
Sbjct: 4 ALYDYESRTETDLSFKKGERLQIVNNTEGDWWLAHSLTTGQTGYIPSNYV 53
>gnl|CDD|212822 cd11889, SH3_Cyk3p-like, Src Homology 3 domain of Cytokinesis
protein 3 and similar proteins. Cytokinesis protein 3
(Cyk3 or Cyk3p) is a component of the actomyosin ring
independent cytokinesis pathway in yeast. It interacts
with Inn1 and facilitates its recruitment to the bud
neck, thereby promoting cytokinesis. Cyk3p contains an
N-terminal SH3 domain and a C-terminal
transglutaminase-like domain. The Cyk3p SH3 domain binds
to the C-terminal proline-rich region of Inn1. SH3
domains bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs;
they play a role in the regulation of enzymes by
intramolecular interactions, changing the subcellular
localization of signal pathway components and mediate
multiprotein complex assemblies.
Length = 53
Score = 39.4 bits (92), Expect = 9e-05
Identities = 17/52 (32%), Positives = 29/52 (55%), Gaps = 2/52 (3%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARK--GLFPATYI 206
V+A+Y + + G+L F GD+I V D WW G++ G+FP+ ++
Sbjct: 2 VKAVYSWAGETEGDLGFLEGDLIEVLSIGDGSWWSGKLRRNGAEGIFPSNFV 53
>gnl|CDD|212723 cd11789, SH3_Nebulin_family_C, C-terminal Src Homology 3 domain of
the Nebulin family of proteins. Nebulin family proteins
contain multiple nebulin repeats, and may contain an
N-terminal LIM domain and/or a C-terminal SH3 domain.
They have molecular weights ranging from 34 to 900 kD,
depending on the number of nebulin repeats, and they all
bind actin. They are involved in the regulation of actin
filament architecture and function as stabilizers and
scaffolds for cytoskeletal structures with which they
associate, such as long actin filaments or focal
adhesions. Nebulin family proteins that contain a
C-terminal SH3 domain include the giant filamentous
protein nebulin, nebulette, Lasp1, and Lasp2. Lasp2,
also called LIM-nebulette, is an alternatively spliced
variant of nebulette. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 39.2 bits (92), Expect = 1e-04
Identities = 18/76 (23%), Positives = 31/76 (40%), Gaps = 24/76 (31%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYRA 218
A+YD+ + E+ F+ GDVI + D W G
Sbjct: 4 AMYDYAAADDDEVSFQEGDVIINVEIIDDGWMEG------------------------TV 39
Query: 219 ELDGKEGLIPSNYIEM 234
+ G+ G++P+NY+E+
Sbjct: 40 QRTGQSGMLPANYVEL 55
Score = 38.1 bits (89), Expect = 3e-04
Identities = 19/55 (34%), Positives = 34/55 (61%), Gaps = 5/55 (9%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMED-DMNWY--RAELDGKEGLIPSNYIEM 55
A +D+ A +DE+SF++ V I+N+E D W + G+ G++P+NY+E+
Sbjct: 3 RAMYDYAAADDDEVSFQEGDV--IINVEIIDDGWMEGTVQRTGQSGMLPANYVEL 55
>gnl|CDD|212969 cd12036, SH3_MPP5, Src Homology 3 domain of Membrane Protein,
Palmitoylated 5 (or MAGUK p55 subfamily member 5).
MPP5, also called PALS1 (Protein associated with Lin7)
or Nagie oko protein in zebrafish or Stardust in
Drosophila, is a scaffolding protein which associates
with Crumbs homolog 1 (CRB1), CRB2, or CRB3 through its
PDZ domain and with PALS1-associated tight junction
protein (PATJ) or multi-PDZ domain protein 1 (MUPP1)
through its L27 domain. The resulting tri-protein
complexes are core proteins of the Crumb complex, which
localizes at tight junctions or subapical regions, and
is involved in the maintenance of apical-basal polarity
in epithelial cells and the morphogenesis and function
of photoreceptor cells. MPP5 is critical for the proper
stratification of the retina and is also expressed in T
lymphocytes where it is important for TCR-mediated
activation of NFkB. Drosophila Stardust exists in
several isoforms, some of which show opposing functions
in photoreceptor cells, which suggests that the
relative ratio of different Crumbs complexes regulates
photoreceptor homeostasis. MPP5 contains two L27
domains followed by the core of three domains
characteristic of MAGUK (membrane-associated guanylate
kinase) proteins: PDZ, SH3, and guanylate kinase (GuK).
In addition, it also contains the Hook (Protein 4.1
Binding) motif in between the SH3 and GuK domains. The
GuK domain in MAGUK proteins is enzymatically inactive;
instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 63
Score = 39.7 bits (93), Expect = 1e-04
Identities = 17/40 (42%), Positives = 26/40 (65%), Gaps = 7/40 (17%)
Query: 17 LSFRKSQVLKILNMEDDMNWYRAELDGKE------GLIPS 50
LSF+K +L +++ ED NW++A +G+E GLIPS
Sbjct: 23 LSFQKGDILHVISQEDP-NWWQAYREGEEDNQSLAGLIPS 61
Score = 33.5 bits (77), Expect = 0.017
Identities = 14/42 (33%), Positives = 24/42 (57%), Gaps = 9/42 (21%)
Query: 157 VQALYDFTP--------QEPGELEFRRGDVITVTDRSDQHWW 190
V+A +D+ P +E G L F++GD++ V + D +WW
Sbjct: 2 VRAHFDYDPEDDPYIPCRELG-LSFQKGDILHVISQEDPNWW 42
>gnl|CDD|212917 cd11984, SH3_Shank3, Src homology 3 domain of SH3 and multiple
ankyrin repeat domains protein 3. Shank3, also called
ProSAP2 (Proline-rich synapse-associated protein 2), is
widely expressed. It plays a role in the formation of
dendritic spines and synapses. Haploinsufficiency of the
Shank3 gene causes the 22q13 deletion/Phelan-McDermid
syndrome, and variants of Shank3 have been implicated in
autism spectrum disorder, schizophrenia, and
intellectual disability. Shank proteins carry
scaffolding functions through multiple sites of
protein-protein interaction in its domain architecture,
including ankyrin (ANK) repeats, a long proline rich
region, as well as SH3, PDZ, and SAM domains. The SH3
domain of Shank binds GRIP, a scaffold protein that
binds AMPA receptors and Eph receptors/ligands. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 39.2 bits (91), Expect = 1e-04
Identities = 15/45 (33%), Positives = 25/45 (55%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPA 203
A+ ++PQ GE++ RG+ + V + +W G + R G FPA
Sbjct: 5 AVKAYSPQGEGEIQLNRGERVKVLSIGEGGFWEGTVKGRTGWFPA 49
>gnl|CDD|212940 cd12007, SH3_Yes, Src homology 3 domain of Yes Protein Tyrosine
Kinase. Yes (or c-Yes) is a member of the Src
subfamily of proteins, which are cytoplasmic (or
non-receptor) PTKs. c-Yes kinase is the cellular
homolog of the oncogenic protein (v-Yes) encoded by the
Yamaguchi 73 and Esh sarcoma viruses. It displays
functional overlap with other Src subfamily members,
particularly Src. It also shows some unique functions
such as binding to occludins, transmembrane proteins
that regulate extracellular interactions in tight
junctions. Yes also associates with a number of
proteins in different cell types that Src does not
interact with, like JAK2 and gp130 in pre-adipocytes,
and Pyk2 in treated pulmonary vein endothelial cells.
Although the biological function of Yes remains
unclear, it appears to have a role in regulating
cell-cell interactions and vesicle trafficking in
polarized cells. Src kinases contain an N-terminal SH4
domain with a myristoylation site, followed by SH3 and
SH2 domains, a tyr kinase domain, and a regulatory
C-terminal region containing a conserved tyr. They are
activated by autophosphorylation at the tyr kinase
domain, but are negatively regulated by phosphorylation
at the C-terminal tyr by Csk (C-terminal Src Kinase).
The SH3 domain of Src kinases contributes to substrate
recruitment by binding adaptor proteins/substrates, and
regulation of kinase activity through an intramolecular
interaction. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 58
Score = 39.2 bits (91), Expect = 1e-04
Identities = 20/51 (39%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKIL-NMEDDMNWYRAELDGKEGLIPSNYI 53
+A +D+ A ++LSF+K + +I+ N E D R+ GK G IPSNY+
Sbjct: 4 VALYDYEARTTEDLSFKKGERFQIINNTEGDWWEARSIATGKNGYIPSNYV 54
Score = 34.2 bits (78), Expect = 0.007
Identities = 18/74 (24%), Positives = 30/74 (40%), Gaps = 24/74 (32%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYRA 218
ALYD+ + +L F++G+ + + ++ WW R+
Sbjct: 5 ALYDYEARTTEDLSFKKGERFQIINNTEGDWWEA------------------------RS 40
Query: 219 ELDGKEGLIPSNYI 232
GK G IPSNY+
Sbjct: 41 IATGKNGYIPSNYV 54
>gnl|CDD|212977 cd12044, SH3_SKAP1, Src Homology 3 domain of Src Kinase-Associated
Phosphoprotein 1. SKAP1, also called SKAP55 (Src
kinase-associated protein of 55kDa), is an immune
cell-specific adaptor protein that plays an important
role in T-cell adhesion, migration, and integrin
clustering. It is expressed exclusively in
T-lymphocytes, mast cells, and macrophages. Binding
partners include ADAP (adhesion and
degranulation-promoting adaptor protein), Fyn, Riam,
RapL, and RasGRP. It contains a pleckstrin homology (PH)
domain, a C-terminal SH3 domain, and several tyrosine
phosphorylation sites. The SH3 domain of SKAP1 is
necessary for its ability to regulate T-cell conjugation
with antigen-presenting cells and the formation of LFA-1
clusters. SKAP1 binds primarily to a proline-rich region
of ADAP through its SH3 domain; its degradation is
regulated by ADAP. A secondary interaction occurs via
the ADAP SH3 domain and the RKxxYxxY motif in SKAP1. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 39.1 bits (91), Expect = 1e-04
Identities = 18/51 (35%), Positives = 26/51 (50%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQH--WWHGEIGARKGLFPATYI 206
Q L+D P EL F+RGD+I + + WW GE+ G+ P Y+
Sbjct: 3 QGLWDCFGDNPDELSFQRGDLIYILSKEYNMYGWWVGELNGIVGIVPKDYL 53
Score = 35.6 bits (82), Expect = 0.002
Identities = 17/47 (36%), Positives = 29/47 (61%), Gaps = 1/47 (2%)
Query: 8 DFNATAEDELSFRKSQVLKILNMEDDM-NWYRAELDGKEGLIPSNYI 53
D DELSF++ ++ IL+ E +M W+ EL+G G++P +Y+
Sbjct: 7 DCFGDNPDELSFQRGDLIYILSKEYNMYGWWVGELNGIVGIVPKDYL 53
>gnl|CDD|212864 cd11931, SH3_SH3RF3_2, Second Src Homology 3 domain of SH3 domain
containing ring finger 3, an E3 ubiquitin-protein
ligase. SH3RF3 is also called POSH2 (Plenty of SH3s 2)
or SH3MD4 (SH3 multiple domains protein 4). It is a
scaffold protein with E3 ubiquitin-protein ligase
activity. It was identified in the screen for
interacting partners of p21-activated kinase 2 (PAK2).
It may play a role in regulating JNK mediated apoptosis
in certain conditions. It also interacts with GTP-loaded
Rac1. SH3RF3 is highly homologous to SH3RF1; it also
contains an N-terminal RING finger domain and four SH3
domains. This model represents the second SH3 domain,
located C-terminal of the first SH3 domain at the
N-terminal half, of SH3RF3. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 38.7 bits (90), Expect = 1e-04
Identities = 19/53 (35%), Positives = 31/53 (58%), Gaps = 4/53 (7%)
Query: 158 QALYDF----TPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ALYDF Q+ L F + +++TV R D++W G +G + G+FP Y+
Sbjct: 3 KALYDFEIKDKDQDKDCLTFTKDEILTVIRRVDENWAEGMLGDKIGIFPILYV 55
>gnl|CDD|212769 cd11835, SH3_ARHGAP32_33, Src homology 3 domain of Rho
GTPase-activating proteins 32 and 33, and similar
proteins. Members of this family contain N-terminal PX
and Src Homology 3 (SH3) domains, a central Rho GAP
domain, and C-terminal extensions. RhoGAPs (or ARHGAPs)
bind to Rho proteins and enhance the hydrolysis rates of
bound GTP. ARHGAP32 is also called RICS, PX-RICS,
p250GAP, or p200RhoGAP. It is a Rho GTPase-activating
protein for Cdc42 and Rac1, and is implicated in the
regulation of postsynaptic signaling and neurite
outgrowth. PX-RICS, a variant of RICS that contain PX
and SH3 domains, is the main isoform expressed during
neural development. It is involved in neural functions
including axon and dendrite extension, postnatal
remodeling, and fine-tuning of neural circuits during
early brain development. ARHGAP33, also called sorting
nexin 26 or TCGAP (Tc10/CDC42 GTPase-activating
protein), is widely expressed in the brain where it is
involved in regulating the outgrowth of axons and
dendrites and is regulated by the protein tyrosine
kinase Fyn. It is translocated to the plasma membrane in
adipocytes in response to insulin and may be involved in
the regulation of insulin-stimulated glucose transport.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 38.6 bits (90), Expect = 2e-04
Identities = 16/43 (37%), Positives = 23/43 (53%), Gaps = 3/43 (6%)
Query: 163 FTPQEPGELEFRRGDVITVTD---RSDQHWWHGEIGARKGLFP 202
+T Q P EL GD+++V D + WW G+ G + G FP
Sbjct: 8 YTAQAPDELSLEVGDIVSVIDMPPPEESTWWRGKKGFQVGFFP 50
Score = 28.6 bits (64), Expect = 0.61
Identities = 12/44 (27%), Positives = 23/44 (52%), Gaps = 2/44 (4%)
Query: 9 FNATAEDELSFRKSQVLKILNM--EDDMNWYRAELDGKEGLIPS 50
+ A A DELS ++ +++M ++ W+R + + G PS
Sbjct: 8 YTAQAPDELSLEVGDIVSVIDMPPPEESTWWRGKKGFQVGFFPS 51
>gnl|CDD|212698 cd11764, SH3_Eps8, Src Homology 3 domain of Epidermal growth factor
receptor kinase substrate 8 and similar proteins. This
group is composed of Eps8 and Eps8-like proteins
including Eps8-like 1-3, among others. These proteins
contain N-terminal Phosphotyrosine-binding (PTB),
central SH3, and C-terminal effector domains. Eps8 binds
either Abi1 (also called E3b1) or Rab5 GTPase activating
protein RN-tre through its SH3 domain. With Abi1 and
Sos1, it becomes part of a trimeric complex that is
required to activate Rac. Together with RN-tre, it
inhibits the internalization of EGFR. The SH3 domains of
Eps8 and similar proteins recognize peptides containing
a PxxDY motif, instead of the classical PxxP motif. SH3
domains are protein interaction domains that usually
bind to proline-rich ligands with moderate affinity and
selectivity. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 38.4 bits (90), Expect = 2e-04
Identities = 17/45 (37%), Positives = 24/45 (53%), Gaps = 6/45 (13%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWW-----HGEIG 195
V+ LYDFT + EL +G+ + V D S Q WW G++G
Sbjct: 1 YVRVLYDFTARNSKELSVLKGEYLEVLDDSRQ-WWKVRNSRGQVG 44
Score = 33.8 bits (78), Expect = 0.009
Identities = 16/54 (29%), Positives = 26/54 (48%), Gaps = 3/54 (5%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAE-LDGKEGLIPSNYIEM 55
+DF A ELS K + L++L +D W++ G+ G +P N +E
Sbjct: 2 VRVLYDFTARNSKELSVLKGEYLEVL--DDSRQWWKVRNSRGQVGYVPHNILEP 53
>gnl|CDD|212972 cd12039, SH3_MPP3, Src Homology 3 domain of Membrane Protein,
Palmitoylated 3 (or MAGUK p55 subfamily member 3). MPP3
is a scaffolding protein that colocalizes with MPP5 and
CRB1 at the subdpical region adjacent to adherens
junctions and may function in photoreceptor polarity. It
interacts with some nectins and regulates their
trafficking and processing. Nectins are cell-cell
adhesion proteins involved in the establishment
apical-basal polarity at cell adhesion sites. It is one
of seven vertebrate homologs of the Drosophila Stardust
protein, which is required in establishing cell
polarity, and it contains two L27 domains followed by
the core of three domains characteristic of MAGUK
(membrane-associated guanylate kinase) proteins: PDZ,
SH3, and guanylate kinase (GuK). The GuK domain in MAGUK
proteins is enzymatically inactive; instead, the domain
mediates protein-protein interactions and associates
intramolecularly with the SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 62
Score = 38.4 bits (89), Expect = 2e-04
Identities = 20/60 (33%), Positives = 30/60 (50%), Gaps = 13/60 (21%)
Query: 157 VQALYDFTP--------QEPGELEFRRGDVITVTDRSDQHWWH----GEIGARKGLFPAT 204
++AL+D+ P QE G L F+R D++ V + D WW G+ R GL P+
Sbjct: 2 MRALFDYNPYEDRAIPCQEAG-LPFKRRDILEVVSQDDPTWWQAKRVGDTNLRAGLIPSK 60
Score = 27.2 bits (60), Expect = 2.6
Identities = 14/41 (34%), Positives = 26/41 (63%), Gaps = 5/41 (12%)
Query: 14 EDELSFRKSQVLKILNMEDDMNWYRAELDG----KEGLIPS 50
E L F++ +L++++ +DD W++A+ G + GLIPS
Sbjct: 20 EAGLPFKRRDILEVVS-QDDPTWWQAKRVGDTNLRAGLIPS 59
>gnl|CDD|212724 cd11790, SH3_Amphiphysin, Src Homology 3 domain of Amphiphysin and
related domains. Amphiphysins function primarily in
endocytosis and other membrane remodeling events. They
exist in several isoforms and mammals possess two
amphiphysin proteins from distinct genes. Amphiphysin I
proteins, enriched in the brain and nervous system,
contain domains that bind clathrin, Adaptor Protein
complex 2 (AP2), dynamin, and synaptojanin. They
function in synaptic vesicle endocytosis. Human
autoantibodies to amphiphysin I hinder GABAergic
signaling and contribute to the pathogenesis of
paraneoplastic stiff-person syndrome. Some amphiphysin
II isoforms, also called Bridging integrator 1 (Bin1),
are localized in many different tissues and may function
in intracellular vesicle trafficking. In skeletal
muscle, Bin1 plays a role in the organization and
maintenance of the T-tubule network. Mutations in Bin1
are associated with autosomal recessive centronuclear
myopathy. Amphiphysins contain an N-terminal BAR domain
with an additional N-terminal amphipathic helix (an
N-BAR), a variable central domain, and a C-terminal SH3
domain. The SH3 domain of amphiphysins bind proline-rich
motifs present in binding partners such as dynamin,
synaptojanin, and nsP3. It also belongs to a subset of
SH3 domains that bind ubiquitin in a site that overlaps
with the peptide binding site. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 64
Score = 38.5 bits (90), Expect = 2e-04
Identities = 19/56 (33%), Positives = 30/56 (53%), Gaps = 7/56 (12%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVT-----DRSDQHWWHG--EIGARKGLFPATY 205
V+A +D+T ++ EL F +GDVI V + D+ W G E +G+FP +
Sbjct: 5 VRATHDYTAEDTDELTFEKGDVILVIPFDDPEEQDEGWLMGVKESTGCRGVFPENF 60
Score = 35.0 bits (81), Expect = 0.005
Identities = 19/56 (33%), Positives = 27/56 (48%), Gaps = 6/56 (10%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMED----DMNWYRA--ELDGKEGLIPSNYIE 54
A HD+ A DEL+F K V+ ++ +D D W E G G+ P N+ E
Sbjct: 7 ATHDYTAEDTDELTFEKGDVILVIPFDDPEEQDEGWLMGVKESTGCRGVFPENFTE 62
>gnl|CDD|212866 cd11933, SH3_Nebulin_C, C-terminal Src Homology 3 domain of
Nebulin. Nebulin is a giant filamentous protein
(600-900 kD) that is expressed abundantly in skeletal
muscle. It binds to actin thin filaments and regulates
its assembly and function. Nebulin was thought to be
part of a molecular ruler complex that is critical in
determining the lengths of actin thin filaments in
skeletal muscle since its length, which varies due to
alternative splicing, correlates with the length of thin
filaments in various muscle types. Recent studies
indicate that nebulin regulates thin filament length by
stabilizing the filaments and preventing
depolymerization. Mutations in nebulin can cause
nemaline myopathy, characterized by muscle weakness
which can be severe and can lead to neonatal lethality.
Nebulin contains an N-terminal LIM domain, many nebulin
repeats/super repeats, and a C-terminal SH3 domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 38.4 bits (89), Expect = 3e-04
Identities = 15/52 (28%), Positives = 27/52 (51%), Gaps = 2/52 (3%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEI--GARKGLFPATYI 206
+A+YD+ + E+ F+ GD I D+ W +G + + G+ PA Y+
Sbjct: 4 FRAMYDYRAADDDEVSFKDGDTIVNVQTIDEGWMYGTVQRTGKTGMLPANYV 55
Score = 33.4 bits (76), Expect = 0.014
Identities = 18/53 (33%), Positives = 31/53 (58%), Gaps = 5/53 (9%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMED-DMNWYRAELD--GKEGLIPSNYIE 54
A +D+ A +DE+SF+ I+N++ D W + GK G++P+NY+E
Sbjct: 6 AMYDYRAADDDEVSFKDGDT--IVNVQTIDEGWMYGTVQRTGKTGMLPANYVE 56
>gnl|CDD|212784 cd11850, SH3_Abl, Src homology 3 domain of the Protein Tyrosine
Kinase, Abelson kinase. Abl (or c-Abl) is a
ubiquitously-expressed cytoplasmic (or nonreceptor) PTK
that contains SH3, SH2, and tyr kinase domains in its
N-terminal region, as well as nuclear localization
motifs, a putative DNA-binding domain, and F- and
G-actin binding domains in its C-terminal tail. It also
contains a short autoinhibitory cap region in its
N-terminus. Abl function depends on its subcellular
localization. In the cytoplasm, Abl plays a role in
cell proliferation and survival. In response to DNA
damage or oxidative stress, Abl is transported to the
nucleus where it induces apoptosis. In chronic
myelogenous leukemia (CML) patients, an aberrant
translocation results in the replacement of the first
exon of Abl with the BCR (breakpoint cluster region)
gene. The resulting BCR-Abl fusion protein is
constitutively active and associates into tetramers,
resulting in a hyperactive kinase sending a continuous
signal. This leads to uncontrolled proliferation,
morphological transformation and anti-apoptotic
effects. BCR-Abl is the target of selective inhibitors,
such as imatinib (Gleevec), used in the treatment of
CML. Abl2, also known as ARG (Abelson-related gene), is
thought to play a cooperative role with Abl in the
proper development of the nervous system. The Tel-ARG
fusion protein, resulting from reciprocal translocation
between chromosomes 1 and 12, is associated with acute
myeloid leukemia (AML). SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 56
Score = 38.2 bits (89), Expect = 3e-04
Identities = 20/52 (38%), Positives = 32/52 (61%), Gaps = 2/52 (3%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELD--GKEGLIPSNYI 53
+A +DF A+ E++LS +K + L++L + W AE G +G +PSNYI
Sbjct: 3 VALYDFVASGENQLSIKKGEQLRVLGYNKNGEWCEAESKSTGGQGWVPSNYI 54
>gnl|CDD|212966 cd12033, SH3_MPP7, Src Homology 3 domain of Membrane Protein,
Palmitoylated 7 (or MAGUK p55 subfamily member 7). MPP7
is a scaffolding protein that binds to DLG1 and promotes
tight junction formation and epithelial cell polarity.
Mutations in the MPP7 gene may be associated with the
pathogenesis of diabetes and extreme bone mineral
density. It is one of seven vertebrate homologs of the
Drosophila Stardust protein, which is required in
establishing cell polarity, and it contains two L27
domains followed by the core of three domains
characteristic of MAGUK (membrane-associated guanylate
kinase) proteins: PDZ, SH3, and guanylate kinase (GuK).
The GuK domain in MAGUK proteins is enzymatically
inactive; instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 61
Score = 38.1 bits (88), Expect = 3e-04
Identities = 17/61 (27%), Positives = 30/61 (49%), Gaps = 11/61 (18%)
Query: 156 LVQALYDFTPQE-------PGELEFRRGDVITVTDRSDQHWWH----GEIGARKGLFPAT 204
++AL+D+ P E L F++GD++ + + D WW G+ R GL P+
Sbjct: 1 FIKALFDYNPNEDKAIPCKEAGLSFKKGDILQIMSQDDATWWQAKHEGDANPRAGLIPSK 60
Query: 205 Y 205
+
Sbjct: 61 H 61
Score = 35.0 bits (80), Expect = 0.004
Identities = 17/43 (39%), Positives = 29/43 (67%), Gaps = 5/43 (11%)
Query: 14 EDELSFRKSQVLKILNMEDDMNWYRAELDG----KEGLIPSNY 52
E LSF+K +L+I++ +DD W++A+ +G + GLIPS +
Sbjct: 20 EAGLSFKKGDILQIMS-QDDATWWQAKHEGDANPRAGLIPSKH 61
>gnl|CDD|212844 cd11911, SH3_CIP4-like, Src Homology 3 domain of
Cdc42-Interacting Protein 4. This subfamily is
composed of Cdc42-Interacting Protein 4 (CIP4), Formin
Binding Protein 17 (FBP17), FormiN Binding Protein
1-Like (FNBP1L), and similar proteins. CIP4 and FNBP1L
are Cdc42 effectors that bind Wiskott-Aldrich syndrome
protein (WASP) and function in endocytosis. CIP4 and
FBP17 bind to the Fas ligand and may be implicated in
the inflammatory response. CIP4 may also play a role in
phagocytosis. It functions downstream of Cdc42 in
PDGF-dependent actin reorganization and cell migration,
and also regulates the activity of PDGFRbeta. It uses
Src as a substrate in regulating the invasiveness of
breast tumor cells. CIP4 may also play a role in the
pathogenesis of Huntington's disease. Members of this
subfamily typically contain an N-terminal F-BAR
(FES-CIP4 Homology and Bin/Amphiphysin/Rvs) domain, a
central Cdc42-binding HR1 domain, and a C-terminal SH3
domain. The SH3 domain of CIP4 associates with Gapex-5,
a Rab31 GEF. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 38.0 bits (89), Expect = 3e-04
Identities = 18/54 (33%), Positives = 32/54 (59%), Gaps = 1/54 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRA-ELDGKEGLIPSNYIEM 55
A +DF+ T+E LS + ++L +L + W R + +G EG +P++YIE+
Sbjct: 2 CTALYDFDGTSEGTLSMEEGEILLVLEEDGGDGWTRVRKNNGDEGYVPTSYIEV 55
Score = 31.5 bits (72), Expect = 0.061
Identities = 19/76 (25%), Positives = 28/76 (36%), Gaps = 24/76 (31%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYRA 218
ALYDF G L G+++ V + W RK
Sbjct: 4 ALYDFDGTSEGTLSMEEGEILLVLEEDGGDGW---TRVRKN------------------- 41
Query: 219 ELDGKEGLIPSNYIEM 234
+G EG +P++YIE+
Sbjct: 42 --NGDEGYVPTSYIEV 55
>gnl|CDD|212833 cd11900, SH3_Nck1_1, First Src Homology 3 domain of Nck1 adaptor
protein. Nck1 (also called Nckalpha) plays a crucial
role in connecting signaling pathways of tyrosine
kinase receptors and important effectors in actin
dynamics and cytoskeletal remodeling. It binds and
activates RasGAP, resulting in the downregulation of
Ras. It is also involved in the signaling of
endothilin-mediated inhibition of cell migration. Nck
adaptor proteins regulate actin cytoskeleton dynamics
by linking proline-rich effector molecules to protein
tyrosine kinases and phosphorylated signaling
intermediates. They contain three SH3 domains and a
C-terminal SH2 domain. They function downstream of the
PDGFbeta receptor and are involved in Rho GTPase
signaling and actin dynamics. Vertebrates contain two
Nck adaptor proteins: Nck1 (also called Nckalpha) and
Nck2, which show partly overlapping functions but also
bind distinct targets. The first SH3 domain of Nck1
binds the PxxDY sequence in the CD3e cytoplasmic tail;
this binding inhibits phosphorylation by Src kinases,
resulting in the downregulation of TCR surface
expression. SH3 domains are protein interaction domains
that usually bind to proline-rich ligands with moderate
affinity and selectivity, preferentially a PxxP motif.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 59
Score = 38.2 bits (88), Expect = 4e-04
Identities = 21/55 (38%), Positives = 33/55 (60%), Gaps = 3/55 (5%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAE-LDGKEGLIPSNYIEMKN 57
+AK D+ A + EL +K++ L +L +D +W+R K G +PSNY+E KN
Sbjct: 6 VAKFDYVAQQDQELDIKKNERLWLL--DDSKSWWRVRNAMNKTGFVPSNYVERKN 58
Score = 30.5 bits (68), Expect = 0.18
Identities = 23/84 (27%), Positives = 38/84 (45%), Gaps = 26/84 (30%)
Query: 153 EECLVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDD 212
EE +V A +D+ Q+ EL+ ++ + + + D S + WW + +
Sbjct: 1 EEVVVVAKFDYVAQQDQELDIKKNERLWLLDDS-KSWWR-----------------VRNA 42
Query: 213 MNWYRAELDGKEGLIPSNYIEMKN 236
MN K G +PSNY+E KN
Sbjct: 43 MN--------KTGFVPSNYVERKN 58
>gnl|CDD|212954 cd12021, SH3_p47phox_1, First or N-terminal Src homology 3 domain
of the p47phox subunit of NADPH oxidase, also called
Neutrophil Cytosolic Factor 1. p47phox, or NCF1, is a
cytosolic subunit of the phagocytic NADPH oxidase
complex (also called Nox2 or gp91phox), which plays a
key role in the ability of phagocytes to defend against
bacterial infections. NADPH oxidase catalyzes the
transfer of electrons from NADPH to oxygen during
phagocytosis forming superoxide and reactive oxygen
species. p47phox is required for activation of NADH
oxidase and plays a role in translocation. It contains
an N-terminal Phox homology (PX) domain, tandem SH3
domains (N-SH3 and C-SH3), a polybasic/autoinhibitory
region, and a C-terminal proline-rich region (PRR). This
model characterizes the first SH3 domain (or N-SH3) of
p47phox. In its inactive state, the tandem SH3 domains
interact intramolecularly with the autoinhibitory
region; upon activation, the tandem SH3 domains are
exposed through a conformational change, resulting in
their binding to the PRR of p22phox and the activation
of NADPH oxidase. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 37.6 bits (87), Expect = 4e-04
Identities = 15/49 (30%), Positives = 30/49 (61%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+A+ D+ E+ + GDV+ V ++S+ WW ++ A++G PA+Y+
Sbjct: 3 RAIADYEKSSKSEMALKTGDVVEVVEKSENGWWFCQLKAKRGWVPASYL 51
>gnl|CDD|212799 cd11865, SH3_Nbp2-like, Src Homology 3 domain of Saccharomyces
cerevisiae Nap1-binding protein 2 and similar fungal
proteins. This subfamily includes Saccharomyces
cerevisiae Nbp2 (Nucleosome assembly protein 1
(Nap1)-binding protein 2), Schizosaccharomyces pombe
Skb5, and similar proteins. Nbp2 interacts with Nap1,
which is essential for maintaining proper nucleosome
structures in transcription and replication. It is also
the binding partner of the yeast type II protein
phosphatase Ptc1p and serves as a scaffolding protein
that brings seven kinases in close contact to Ptc1p.
Nbp2 plays a role many cell processes including
organelle inheritance, mating hormone response, cell
wall stress, mitotic cell growth at elevated
temperatures, and high osmolarity. Skb5 interacts with
the p21-activated kinase (PAK) homolog Shk1, which is
critical for fission yeast cell viability. Skb5
activates Shk1 and plays a role in regulating cell
morphology and growth under hypertonic conditions. Nbp2
and Skb5 contain an SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 37.9 bits (88), Expect = 4e-04
Identities = 17/50 (34%), Positives = 25/50 (50%), Gaps = 2/50 (4%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWW--HGEIGARKGLFPATYI 206
ALYDF P+ EL F G ++ + + Q W E G + GL P ++
Sbjct: 4 ALYDFEPEHDNELGFAEGQILFILYKHGQGWLIAEDESGGKTGLVPEEFV 53
Score = 33.3 bits (76), Expect = 0.014
Identities = 19/56 (33%), Positives = 29/56 (51%), Gaps = 3/56 (5%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELD--GKEGLIPSNYIEM 55
A+A +DF ++EL F + Q+L IL W AE + GK GL+P ++
Sbjct: 1 RAVALYDFEPEHDNELGFAEGQILFILYKHGQ-GWLIAEDESGGKTGLVPEEFVSY 55
>gnl|CDD|212729 cd11795, SH3_DNMBP_N2, Second N-terminal Src homology 3 domain of
Dynamin Binding Protein, also called Tuba. DNMBP or
Tuba is a cdc42-specific guanine nucleotide exchange
factor (GEF) that contains four N-terminal SH3 domains,
a central RhoGEF [or Dbl homology (DH)] domain followed
by a Bin/Amphiphysin/Rvs (BAR) domain, and two
C-terminal SH3 domains. It provides a functional link
between dynamin and key regulatory proteins of the actin
cytoskeleton. It plays an important role in regulating
cell junction configuration. The four N-terminal SH3
domains of DNMBP binds the GTPase dynamin, which plays
an important role in the fission of endocytic vesicles.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 37.8 bits (88), Expect = 4e-04
Identities = 17/42 (40%), Positives = 22/42 (52%), Gaps = 1/42 (2%)
Query: 162 DFTPQEPGELEFRRGDVITVTDRSDQHWWHGEI-GARKGLFP 202
FT QEPG L +RGD++ +T +D W G G FP
Sbjct: 7 AFTSQEPGHLNLQRGDLVELTGTTDSGWLQGRSCWGSSGFFP 48
>gnl|CDD|212867 cd11934, SH3_Lasp1_C, C-terminal Src Homology 3 domain of LIM and
SH3 domain protein 1. Lasp1 is a cytoplasmic protein
that binds focal adhesion proteins and is involved in
cell signaling, migration, and proliferation. It is
overexpressed in several cancer cells including breast,
ovarian, bladder, and liver. In cancer cells, it can be
found in the nucleus; its degree of nuclear
localization correlates with tumor size and poor
prognosis. Lasp1 is a 36kD protein containing an
N-terminal LIM domain, two nebulin repeats, and a
C-terminal SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 59
Score = 37.7 bits (87), Expect = 5e-04
Identities = 17/51 (33%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 5 AKHDFNATAEDELSFRKSQ-VLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
A +D+NA EDE+SF+ ++ + ++D + E G G++P+NY+E
Sbjct: 7 AVYDYNAADEDEVSFQDGDTIVNVQQIDDGWMYGTVERTGDTGMLPANYVE 57
Score = 35.4 bits (81), Expect = 0.003
Identities = 16/51 (31%), Positives = 26/51 (50%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHG--EIGARKGLFPATYI 206
+A+YD+ + E+ F+ GD I + D W +G E G+ PA Y+
Sbjct: 6 RAVYDYNAADEDEVSFQDGDTIVNVQQIDDGWMYGTVERTGDTGMLPANYV 56
>gnl|CDD|212691 cd11757, SH3_SH3BP4, Src Homology 3 domain of SH3 domain-binding
protein 4. SH3 domain-binding protein 4 (SH3BP4) is
also called transferrin receptor trafficking protein
(TTP). SH3BP4 is an endocytic accessory protein that
interacts with endocytic proteins including clathrin and
dynamin, and regulates the internalization of the
transferrin receptor (TfR). SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 52
Score = 37.3 bits (86), Expect = 5e-04
Identities = 16/50 (32%), Positives = 25/50 (50%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
V A+ D+ P L+F +GD + V D S WW+ G P++Y+
Sbjct: 2 VVAIKDYCPTNFTTLKFSKGDHLYVLDTSGGEWWYAHNTTEMGYIPSSYV 51
Score = 26.9 bits (59), Expect = 2.6
Identities = 17/53 (32%), Positives = 25/53 (47%), Gaps = 1/53 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
E +A D+ T L F K L +L+ WY A + G IPS+Y++
Sbjct: 1 EVVAIKDYCPTNFTTLKFSKGDHLYVLDTSGGEWWY-AHNTTEMGYIPSSYVQ 52
>gnl|CDD|212944 cd12011, SH3_SLAP2, Src homology 3 domain of Src-Like Adaptor
Protein 2. SLAP2 plays a role in c-Cbl-dependent
regulation of CSF1R, a tyrosine kinase important for
myeloid cell growth and differentiation. It has been
shown to interact with CSF1R, c-Cbl, LAT, CD247, and
Zap70. SLAPs are adaptor proteins with limited
similarity to Src family tyrosine kinases. They contain
an N-terminal SH3 domain followed by an SH2 domain, and
a unique C-terminal sequence. They function in
regulating the signaling, ubiquitination, and
trafficking of T-cell receptor (TCR) and B-cell
receptor (BCR) components. The SH3 domain of SLAP forms
a complex with v-Abl. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 55
Score = 37.4 bits (87), Expect = 6e-04
Identities = 19/53 (35%), Positives = 31/53 (58%), Gaps = 4/53 (7%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWY--RAELDGKEGLIPSNYI 53
A+A +F + ELS R + L IL+ +D +W+ + + G+E IPSNY+
Sbjct: 2 AVALCNFPSGGPTELSIRMGEQLTILS--EDGDWWKVSSAVTGRECYIPSNYV 52
>gnl|CDD|212948 cd12015, SH3_Tks_1, First Src homology 3 domain of Tyrosine kinase
substrate (Tks) proteins. Tks proteins are Src
substrates and scaffolding proteins that play important
roles in the formation of podosomes and invadopodia, the
dynamic actin-rich structures that are related to cell
migration and cancer cell invasion. Vertebrates contain
two Tks proteins, Tks4 (Tyr kinase substrate with four
SH3 domains) and Tks5 (Tyr kinase substrate with five
SH3 domains), which display partially overlapping but
non-redundant functions. Both associate with the ADAMs
family of transmembrane metalloproteases, which function
as sheddases and mediators of cell and matrix
interactions. Tks5 interacts with N-WASP and Nck, while
Tks4 is essential for the localization of MT1-MMP
(membrane-type 1 matrix metalloproteinase) to
invadopodia. Tks proteins contain an N-terminal Phox
homology (PX) domain and four or five SH3 domains. This
model characterizes the first SH3 domain of Tks
proteins. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 37.0 bits (86), Expect = 6e-04
Identities = 16/45 (35%), Positives = 27/45 (60%)
Query: 162 DFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
D+ Q+P E+ R GDV+ V ++++ WW + +G PATY+
Sbjct: 7 DYKKQQPNEISLRAGDVVDVIEKNENGWWFVSLEDEQGWVPATYL 51
>gnl|CDD|212859 cd11926, SH3_SH3RF1_3, Third Src Homology 3 domain of SH3 domain
containing ring finger 1, an E3 ubiquitin-protein
ligase. SH3RF1 is also called POSH (Plenty of SH3s) or
SH3MD2 (SH3 multiple domains protein 2). It is a
scaffold protein that acts as an E3 ubiquitin-protein
ligase. It plays a role in calcium homeostasis through
the control of the ubiquitin domain protein Herp. It may
also have a role in regulating death receptor mediated
and JNK mediated apoptosis. SH3RF1 also enhances the
ubiquitination of ROMK1 potassium channel resulting in
its increased endocytosis. It contains an N-terminal
RING finger domain and four SH3 domains. This model
represents the third SH3 domain, located in the middle,
of SH3RF1. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 37.3 bits (86), Expect = 6e-04
Identities = 17/50 (34%), Positives = 30/50 (60%), Gaps = 2/50 (4%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEI--GARKGLFPATYI 206
A+Y +TP++ ELE R+G++ V +R W+ G ++ G+FP Y+
Sbjct: 4 AIYPYTPRKEDELELRKGEMFLVFERCQDGWFKGTSMHTSKIGVFPGNYV 53
Score = 28.4 bits (63), Expect = 0.81
Identities = 14/52 (26%), Positives = 24/52 (46%), Gaps = 3/52 (5%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAEL--DGKEGLIPSNYI 53
+A + + EDEL RK ++ + D W++ K G+ P NY+
Sbjct: 3 VAIYPYTPRKEDELELRKGEMFLVFERCQD-GWFKGTSMHTSKIGVFPGNYV 53
>gnl|CDD|212837 cd11904, SH3_Nck1_3, Third Src Homology 3 domain of Nck1 adaptor
protein. Nck1 (also called Nckalpha) plays a crucial
role in connecting signaling pathways of tyrosine kinase
receptors and important effectors in actin dynamics and
cytoskeletal remodeling. It binds and activates RasGAP,
resulting in the downregulation of Ras. It is also
involved in the signaling of endothilin-mediated
inhibition of cell migration. Nck adaptor proteins
regulate actin cytoskeleton dynamics by linking
proline-rich effector molecules to protein tyrosine
kinases and phosphorylated signaling intermediates. They
contain three SH3 domains and a C-terminal SH2 domain.
They function downstream of the PDGFbeta receptor and
are involved in Rho GTPase signaling and actin dynamics.
Vertebrates contain two Nck adaptor proteins: Nck1 (also
called Nckalpha) and Nck2, which show partly overlapping
functions but also bind distinct targets. The third SH3
domain of Nck appears to prefer ligands with a PxAPxR
motif. SH3 domains are protein interaction domains that
usually bind to proline-rich ligands with moderate
affinity and selectivity, preferentially a PxxP motif.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 37.3 bits (86), Expect = 6e-04
Identities = 19/54 (35%), Positives = 30/54 (55%), Gaps = 3/54 (5%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDR--SDQHWWH-GEIGARKGLFPATYI 206
+VQALY F+ EL F +G+V+ V ++ +D WW + + GL P Y+
Sbjct: 2 VVQALYPFSSSNDEELNFEKGEVMDVIEKPENDPEWWKCRKANGQVGLVPKNYV 55
Score = 36.9 bits (85), Expect = 9e-04
Identities = 16/51 (31%), Positives = 35/51 (68%), Gaps = 2/51 (3%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNM-EDDMNWYRA-ELDGKEGLIPSNYI 53
A + F+++ ++EL+F K +V+ ++ E+D W++ + +G+ GL+P NY+
Sbjct: 5 ALYPFSSSNDEELNFEKGEVMDVIEKPENDPEWWKCRKANGQVGLVPKNYV 55
>gnl|CDD|212997 cd12064, SH3_GRAF, Src Homology 3 domain of GTPase Regulator
Associated with Focal adhesion kinase. GRAF, also
called Rho GTPase activating protein 26 (ARHGAP26),
Oligophrenin-1-like (OPHN1L) or GRAF1, is a GAP with
activity towards RhoA and Cdc42 and is only weakly
active towards Rac1. It influences Rho-mediated
cytoskeletal rearrangements and binds focal adhesion
kinase (FAK), which is a critical component of integrin
signaling. It is essential for the major
clathrin-independent endocytic pathway mediated by
pleiomorphic membranes. GRAF contains an N-terminal BAR
domain, followed by a Pleckstrin homology (PH) domain,
a Rho GAP domain, and a C-terminal SH3 domain. The SH3
domain of GRAF binds PKNbeta, a target of the small
GTPase Rho. SH3 domains bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs; they play a role in the regulation of
enzymes by intramolecular interactions, changing the
subcellular localization of signal pathway components
and mediate multiprotein complex assemblies.
Length = 56
Score = 37.0 bits (85), Expect = 7e-04
Identities = 19/53 (35%), Positives = 27/53 (50%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
+A A + A + ELSF V ++ + W L+GK GLIP NY+E
Sbjct: 2 KAKALYACKAEHDSELSFTAGTVFDNVHPSQEPGWLEGTLNGKTGLIPENYVE 54
Score = 30.5 bits (68), Expect = 0.16
Identities = 11/19 (57%), Positives = 13/19 (68%)
Query: 215 WYRAELDGKEGLIPSNYIE 233
W L+GK GLIP NY+E
Sbjct: 36 WLEGTLNGKTGLIPENYVE 54
>gnl|CDD|212745 cd11811, SH3_CHK, Src Homology 3 domain of CSK homologous kinase.
CHK is also referred to as megakaryocyte-associated
tyrosine kinase (Matk). It inhibits Src kinases using a
noncatalytic mechanism by simply binding to them. As a
negative regulator of Src kinases, Chk may play
important roles in cell proliferation, survival, and
differentiation, and consequently, in cancer
development and progression. To inhibit Src kinases
that are anchored to the plasma membrane, CHK is
translocated to the membrane via binding to specific
transmembrane proteins, G-proteins, or adaptor proteins
near the membrane. CHK also plays a role in neural
differentiation in a manner independent of Src by
enhancing MAPK activation via Ras-mediated signaling.
It is a cytoplasmic (or nonreceptor) tyr kinase
containing the Src homology domains, SH3 and SH2,
N-terminal to the catalytic tyr kinase domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 37.1 bits (86), Expect = 7e-04
Identities = 15/51 (29%), Positives = 26/51 (50%), Gaps = 2/51 (3%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELD--GKEGLIPS 50
+ + K D EL+F K ++ I+ + WYRA + G+EGL+ +
Sbjct: 3 QCVTKKDHTKPKPGELAFHKGDIVTIVETCERKGWYRARHNTSGEEGLVAA 53
Score = 33.6 bits (77), Expect = 0.014
Identities = 22/70 (31%), Positives = 31/70 (44%), Gaps = 27/70 (38%)
Query: 162 DFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYRAELD 221
D T +PGEL F +GD++T+ E RKG WYRA +
Sbjct: 9 DHTKPKPGELAFHKGDIVTIV----------ETCERKG---------------WYRARHN 43
Query: 222 --GKEGLIPS 229
G+EGL+ +
Sbjct: 44 TSGEEGLVAA 53
>gnl|CDD|198205 cd10342, SH2_SAP1, Src homology 2 (SH2) domain found in
SLAM-associated protein (SAP)1. The X-linked
lymphoproliferative syndrome (XLP) gene encodes SAP
(also called SH2D1A/DSHP) a protein that consists of a 5
residue N-terminus, a single SH2 domain, and a short 25
residue C-terminal tail. XLP is characterized by an
extreme sensitivity to Epstein-Barr virus. Both T and
natural killer (NK) cell dysfunctions have been seen in
XLP patients. SAP binds the cytoplasmic tail of
Signaling lymphocytic activation molecule (SLAM), 2B4,
Ly-9, and CD84. SAP is believed to function as a
signaling inhibitor, by blocking or regulating binding
of other signaling proteins. SAP and the SAP-like
protein EAT-2 recognize the sequence motif TIpYXX[VI],
which is found in the cytoplasmic domains of a
restricted number of T, B, and NK cell surface receptors
and are proposed to be natural inhibitors or regulators
of the physiological role of a small family of receptors
on the surface of these cells. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 38.5 bits (89), Expect = 7e-04
Identities = 19/59 (32%), Positives = 35/59 (59%), Gaps = 1/59 (1%)
Query: 60 WYYGRITRADAERLL-SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 117
Y+G+I+R E+LL + +G++L+R SES PG + L V + ++V + +G +
Sbjct: 5 VYHGKISRETGEKLLLATGLDGSYLLRDSESVPGVYCLCVLYHGYIYTYRVSQTETGSW 63
Score = 38.5 bits (89), Expect = 7e-04
Identities = 19/59 (32%), Positives = 35/59 (59%), Gaps = 1/59 (1%)
Query: 239 WYYGRITRADAERLL-SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGKF 296
Y+G+I+R E+LL + +G++L+R SES PG + L V + ++V + +G +
Sbjct: 5 VYHGKISRETGEKLLLATGLDGSYLLRDSESVPGVYCLCVLYHGYIYTYRVSQTETGSW 63
>gnl|CDD|212874 cd11941, SH3_ARHGEF37_C2, Second C-terminal Src homology 3 domain
of Rho guanine nucleotide exchange factor 37. ARHGEF37
contains a RhoGEF [or Dbl homology (DH)] domain
followed by a Bin/Amphiphysin/Rvs (BAR) domain, and two
C-terminal SH3 domains. Its specific function is
unknown. Its domain architecture is similar to the
C-terminal half of DNMBP or Tuba, a cdc42-specific GEF
that provides a functional link between dynamin, Rho
GTPase signaling, and actin dynamics, and plays an
important role in regulating cell junction
configuration. GEFs activate small GTPases by
exchanging bound GDP for free GTP. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 57
Score = 36.8 bits (85), Expect = 0.001
Identities = 15/55 (27%), Positives = 30/55 (54%), Gaps = 3/55 (5%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMED---DMNWYRAELDGKEGLIPSNYI 53
+ +A + F A ++ E+S + Q + +L D W E++G+ G +PS+Y+
Sbjct: 1 QVVAAYPFTARSKHEVSLQAGQPVTVLEPHDKKGSPEWSLVEVNGQRGYVPSSYL 55
Score = 33.0 bits (75), Expect = 0.020
Identities = 15/55 (27%), Positives = 27/55 (49%), Gaps = 4/55 (7%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQ----HWWHGEIGARKGLFPATYIL 207
V A Y FT + E+ + G +TV + D+ W E+ ++G P++Y+
Sbjct: 2 VVAAYPFTARSKHEVSLQAGQPVTVLEPHDKKGSPEWSLVEVNGQRGYVPSSYLA 56
>gnl|CDD|212834 cd11901, SH3_Nck1_2, Second Src Homology 3 domain of Nck1 adaptor
protein. Nck1 (also called Nckalpha) plays a crucial
role in connecting signaling pathways of tyrosine
kinase receptors and important effectors in actin
dynamics and cytoskeletal remodeling. It binds and
activates RasGAP, resulting in the downregulation of
Ras. It is also involved in the signaling of
endothilin-mediated inhibition of cell migration. Nck
adaptor proteins regulate actin cytoskeleton dynamics
by linking proline-rich effector molecules to protein
tyrosine kinases and phosphorylated signaling
intermediates. They contain three SH3 domains and a
C-terminal SH2 domain. They function downstream of the
PDGFbeta receptor and are involved in Rho GTPase
signaling and actin dynamics. Vertebrates contain two
Nck adaptor proteins: Nck1 (also called Nckalpha) and
Nck2, which show partly overlapping functions but also
bind distinct targets. The second SH3 domain of Nck
appears to prefer ligands containing the APxxPxR motif.
SH3 domains are protein interaction domains that
usually bind to proline-rich ligands with moderate
affinity and selectivity, preferentially a PxxP motif.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 36.6 bits (84), Expect = 0.001
Identities = 18/53 (33%), Positives = 28/53 (52%), Gaps = 1/53 (1%)
Query: 1 MEAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
+ A K ++ A EDELS K + ++ D W+R +G+ G PSNY+
Sbjct: 2 LPAYVKFNYTAEREDELSLVKGTKVIVMEKCSD-GWWRGSYNGQVGWFPSNYV 53
Score = 35.0 bits (80), Expect = 0.004
Identities = 12/46 (26%), Positives = 23/46 (50%)
Query: 161 YDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+++T + EL +G + V ++ WW G + G FP+ Y+
Sbjct: 8 FNYTAEREDELSLVKGTKVIVMEKCSDGWWRGSYNGQVGWFPSNYV 53
>gnl|CDD|212832 cd11899, SH3_Nck2_1, First Src Homology 3 domain of Nck2 adaptor
protein. Nck2 (also called Nckbeta or Growth factor
receptor-bound protein 4, Grb4) plays a crucial role in
connecting signaling pathways of tyrosine kinase
receptors and important effectors in actin dynamics and
cytoskeletal remodeling. It binds neuronal signaling
proteins such as ephrinB and Disabled-1 (Dab-1)
exclusively. Nck adaptor proteins regulate actin
cytoskeleton dynamics by linking proline-rich effector
molecules to protein tyrosine kinases and
phosphorylated signaling intermediates. They contain
three SH3 domains and a C-terminal SH2 domain. They
function downstream of the PDGFbeta receptor and are
involved in Rho GTPase signaling and actin dynamics.
Vertebrates contain two Nck adaptor proteins: Nck1
(also called Nckalpha) and Nck2, which show partly
overlapping functions but also bind distinct targets.
The first SH3 domain of Nck2 binds the PxxDY sequence
in the CD3e cytoplasmic tail; this binding inhibits
phosphorylation by Src kinases, resulting in the
downregulation of TCR surface expression. SH3 domains
are protein interaction domains that usually bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially a PxxP motif. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 36.6 bits (84), Expect = 0.001
Identities = 20/54 (37%), Positives = 31/54 (57%), Gaps = 3/54 (5%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAE-LDGKEGLIPSNYIEMK 56
IAK D+ A + EL +K++ L +L +D W+R + G +PSNY+E K
Sbjct: 7 IAKWDYTAQQDQELDIKKNERLWLL--DDSKTWWRVRNAANRTGYVPSNYVERK 58
Score = 32.4 bits (73), Expect = 0.038
Identities = 16/54 (29%), Positives = 28/54 (51%)
Query: 153 EECLVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
EE +V A +D+T Q+ EL+ ++ + + + D S W R G P+ Y+
Sbjct: 2 EEVIVIAKWDYTAQQDQELDIKKNERLWLLDDSKTWWRVRNAANRTGYVPSNYV 55
>gnl|CDD|212873 cd11940, SH3_ARHGEF5_19, Src homology 3 domain of the Rho guanine
nucleotide exchange factors ARHGEF5 and ARHGEF19.
ARHGEF5, also called ephexin-3 or TIM (Transforming
immortalized mammary oncogene), is a potent activator of
RhoA and it plays roles in regulating cell shape,
adhesion, and migration. It binds to the SH3 domain of
Src and is involved in regulating Src-induced podosome
formation. ARHGEF19, also called ephexin-2 or WGEF
(weak-similarity GEF), is highly expressed in the
intestine, liver, heart and kidney. It activates RhoA,
Cdc42, and Rac 1, and has been shown to activate RhoA in
the Wnt-PCP (planar cell polarity) pathway. It is
involved in the regulation of cell polarity and
cytoskeletal reorganization. ARHGEF5 and ARHGEF19
contain RhoGEF (also called Dbl-homologous or DH),
Pleckstrin Homology (PH), and SH3 domains. The SH3
domains of ARHGEFs play an autoinhibitory role through
intramolecular interactions with a proline-rich region
N-terminal to the DH domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 36.3 bits (84), Expect = 0.001
Identities = 15/52 (28%), Positives = 24/52 (46%), Gaps = 2/52 (3%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGE--IGARKGLFPATYI 206
VQ + + QE EL + D+I V +S W G +G FP +++
Sbjct: 2 VQCIRSYKAQENDELTLEKADIIMVRQQSSDGWLEGVRLSDGERGWFPQSHV 53
>gnl|CDD|212719 cd11785, SH3_SH3RF_C, C-terminal (Fourth) Src Homology 3 domain of
SH3 domain containing ring finger 1 (SH3RF1), SH3RF3,
and similar domains. SH3RF1 (or POSH) and SH3RF3 (or
POSH2) are scaffold proteins that function as E3
ubiquitin-protein ligases. They contain an N-terminal
RING finger domain and four SH3 domains. This model
represents the fourth SH3 domain, located at the
C-terminus of SH3RF1 and SH3RF3, and similar domains.
SH3RF1 plays a role in calcium homeostasis through the
control of the ubiquitin domain protein Herp. It may
also have a role in regulating death receptor mediated
and JNK mediated apoptosis. SH3RF3 interacts with
p21-activated kinase 2 (PAK2) and GTP-loaded Rac1. It
may play a role in regulating JNK mediated apoptosis in
certain conditions. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 35.9 bits (83), Expect = 0.002
Identities = 14/46 (30%), Positives = 26/46 (56%), Gaps = 2/46 (4%)
Query: 163 FTPQEPGELEFRRGDVITVTDRSDQHWWHGEI--GARKGLFPATYI 206
+ PQ ELE + GD++ V + + W+ G + + GLFP +++
Sbjct: 8 YPPQSEAELELKEGDIVFVHKKREDGWFKGTLQRTGKTGLFPGSFV 53
>gnl|CDD|212718 cd11784, SH3_SH3RF2_3, Third Src Homology 3 domain of SH3 domain
containing ring finger 2. SH3RF2 is also called POSHER
(POSH-eliminating RING protein) or HEPP1 (heart protein
phosphatase 1-binding protein). It acts as an
anti-apoptotic regulator of the JNK pathway by binding
to and promoting the degradation of SH3RF1 (or POSH), a
scaffold protein that is required for pro-apoptotic JNK
activation. It may also play a role in cardiac functions
together with protein phosphatase 1. SH3RF2 contains an
N-terminal RING finger domain and three SH3 domains.
This model represents the third SH3 domain, located in
the middle, of SH3RF2. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 35.9 bits (83), Expect = 0.002
Identities = 15/50 (30%), Positives = 28/50 (56%), Gaps = 2/50 (4%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGE--IGARKGLFPATYI 206
AL+ ++ P ELE ++G+ + V + + W G + R G+FP+ Y+
Sbjct: 4 ALHSYSAHRPEELELQKGEGVRVLGKFQEGWLRGLSLVTGRVGIFPSNYV 53
Score = 32.1 bits (73), Expect = 0.042
Identities = 15/52 (28%), Positives = 30/52 (57%), Gaps = 3/52 (5%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYR--AELDGKEGLIPSNYI 53
+A H ++A +EL +K + +++L + W R + + G+ G+ PSNY+
Sbjct: 3 VALHSYSAHRPEELELQKGEGVRVLGKFQE-GWLRGLSLVTGRVGIFPSNYV 53
>gnl|CDD|212998 cd12065, SH3_GRAF2, Src Homology 3 domain of GTPase Regulator
Associated with Focal adhesion kinase 2. GRAF2, also
called Rho GTPase activating protein 10 (ARHGAP10) or
PS-GAP, is a GAP with activity towards Cdc42 and RhoA.
It regulates caspase-activated p21-activated protein
kinase-2 (PAK-2p34). GRAF2 interacts with PAK-2p34,
leading to its stabilization and decrease of cell
death. It is highly expressed in skeletal muscle, and
is involved in alpha-catenin recruitment at cell-cell
junctions. GRAF2 contains an N-terminal BAR domain,
followed by a Pleckstrin homology (PH) domain, a Rho
GAP domain, and a C-terminal SH3 domain. The SH3 domain
of GRAF binds PKNbeta, a target of the small GTPase
Rho. SH3 domains bind to proline-rich ligands with
moderate affinity and selectivity, preferentially to
PxxP motifs; they play a role in the regulation of
enzymes by intramolecular interactions, changing the
subcellular localization of signal pathway components
and mediate multiprotein complex assemblies.
Length = 54
Score = 35.7 bits (82), Expect = 0.002
Identities = 18/54 (33%), Positives = 28/54 (51%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIEM 55
+A A + A ELSF + + + + + W L+GK GLIP NY+E+
Sbjct: 1 KAKAVYPCEAEHSSELSFEVGAIFEDVTLSREPGWLEGTLNGKRGLIPENYVEI 54
Score = 30.0 bits (67), Expect = 0.26
Identities = 11/20 (55%), Positives = 14/20 (70%)
Query: 215 WYRAELDGKEGLIPSNYIEM 234
W L+GK GLIP NY+E+
Sbjct: 35 WLEGTLNGKRGLIPENYVEI 54
Score = 27.3 bits (60), Expect = 2.2
Identities = 14/50 (28%), Positives = 23/50 (46%), Gaps = 1/50 (2%)
Query: 158 QALYDFTPQEPGELEFRRGDVI-TVTDRSDQHWWHGEIGARKGLFPATYI 206
+A+Y + EL F G + VT + W G + ++GL P Y+
Sbjct: 3 KAVYPCEAEHSSELSFEVGAIFEDVTLSREPGWLEGTLNGKRGLIPENYV 52
>gnl|CDD|212947 cd12014, SH3_RIM-BP_1, First Src homology 3 domain of
Rab3-interacting molecules (RIMs) binding proteins.
RIMs binding proteins (RBPs, RIM-BPs) associate with
calcium channels present in photoreceptors, neurons,
and hair cells; they interact simultaneously with
specific calcium channel subunits, and active zone
proteins, RIM1 and RIM2. RIMs are part of the matrix at
the presynaptic active zone and are associated with
synaptic vesicles through their interaction with the
small GTPase Rab3. RIM-BPs play a role in regulating
synaptic transmission by serving as adaptors and
linking calcium channels with the synaptic vesicle
release machinery. RIM-BPs contain three SH3 domains
and two to three fibronectin III repeats. Invertebrates
contain one, while vertebrates contain at least two
RIM-BPs, RIM-BP1 and RIM-BP2. RIM-BP1 is also called
peripheral-type benzodiazapine receptor associated
protein 1 (PRAX-1). Mammals contain a third protein,
RIM-BP3. RIM-BP1 and RIM-BP2 are predominantly
expressed in the brain where they display overlapping
but distinct expression patterns, while RIM-BP3 is
almost exclusively expressed in the testis and is
essential in spermiogenesis. The SH3 domains of RIM-BPs
bind to the PxxP motifs of RIM1, RIM2, and L-type
(alpha1D) and N-type (alpha1B) calcium channel
subunits. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate
affinity and selectivity. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 62
Score = 36.2 bits (84), Expect = 0.002
Identities = 16/46 (34%), Positives = 24/46 (52%), Gaps = 1/46 (2%)
Query: 10 NATAEDELSFRKSQVLKILNMEDDMNWYRAEL-DGKEGLIPSNYIE 54
N E EL + + D+ +Y EL DG+ GL+PSN++E
Sbjct: 16 NENPEAELPLNAGDYVYVYGDMDEDGFYEGELLDGRRGLVPSNFVE 61
Score = 32.3 bits (74), Expect = 0.036
Identities = 22/86 (25%), Positives = 33/86 (38%), Gaps = 33/86 (38%)
Query: 156 LVQALYDFTPQEPG-------ELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILN 208
+ A Y + P EL GD + V G +
Sbjct: 1 VFVARYSYNPLRDSPNENPEAELPLNAGDYVYV----------------YG--------D 36
Query: 209 MEDDMNWYRAEL-DGKEGLIPSNYIE 233
M++D +Y EL DG+ GL+PSN++E
Sbjct: 37 MDED-GFYEGELLDGRRGLVPSNFVE 61
>gnl|CDD|212722 cd11788, SH3_RasGAP, Src Homology 3 domain of Ras
GTPase-Activating Protein 1. RasGAP, also called Ras
p21 protein activator, RASA1, or p120RasGAP, is part of
the GAP1 family of GTPase-activating proteins. It is a
120kD cytosolic protein containing an SH3 domain
flanked by two SH2 domains at the N-terminal end, a
pleckstrin homology (PH) domain, a calcium dependent
phospholipid binding domain (CaLB/C2), and a C-terminal
catalytic GAP domain. It stimulates the GTPase activity
of normal RAS p21. It acts as a positive effector of
Ras in tumor cells. It also functions as a regulator
downstream of tyrosine receptors such as those of PDGF,
EGF, ephrin, and insulin, among others. The SH3 domain
of RasGAP is unable to bind proline-rich sequences but
have been shown to interact with protein partners such
as the G3BP protein, Aurora kinases, and the Calpain
small subunit 1. The RasGAP SH3 domain is necessary for
the downstream signaling of Ras and it also influences
Rho-mediated cytoskeletal reorganization. SH3 domains
are protein interaction domains that typically bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 35.8 bits (83), Expect = 0.002
Identities = 16/54 (29%), Positives = 27/54 (50%), Gaps = 2/54 (3%)
Query: 3 AIAKHDFNATAE-DELSFRKSQVLKILN-MEDDMNWYRAELDGKEGLIPSNYIE 54
A +N + DELSF+K + + N +ED W + G+ GL+ + +E
Sbjct: 4 VRAILPYNKVPDTDELSFQKGDIFVVHNELEDGWLWVTSLRTGESGLVFRDLVE 57
>gnl|CDD|212872 cd11939, SH3_ephexin1, Src homology 3 domain of the Rho guanine
nucleotide exchange factor, ephexin-1 (also called NGEF
or ARHGEF27). Ephexin-1, also called NGEF (neuronal
GEF) or ARHGEF27, activates RhoA, Tac1, and Cdc42 by
exchanging bound GDP for free GTP. It is expressed
mainly in the brain in a region associated with movement
control. It regulates the stability of postsynaptic
acetylcholine receptor (AChR) clusters and thus, plays a
critical role in the maturation and neurotransmission of
neuromuscular junctions. Ephexin-1 directly interacts
with the ephrin receptor EphA4 and their coexpression
enhances the ability of ephexin-1 to activate RhoA. It
is required for normal axon growth and EphA-induced
growth cone collapse. Ephexin-1 contains RhoGEF (also
called Dbl-homologous or DH), Pleckstrin Homology (PH),
and SH3 domains. The SH3 domains of ARHGEFs play an
autoinhibitory role through intramolecular interactions
with a proline-rich region N-terminal to the DH domain.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 35.7 bits (82), Expect = 0.002
Identities = 17/50 (34%), Positives = 27/50 (54%), Gaps = 2/50 (4%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEI--GARKGLFPAT 204
VQ ++ + QEP EL DV+ + D++D W GE +G FP++
Sbjct: 2 VQCVHPYVSQEPDELSLELADVLNILDKTDDGWIFGERLHDQERGWFPSS 51
Score = 28.0 bits (62), Expect = 1.2
Identities = 18/50 (36%), Positives = 25/50 (50%), Gaps = 3/50 (6%)
Query: 7 HDFNATAEDELSFRKSQVLKILNMEDDMNWYRAEL--DGKEGLIPSNYIE 54
H + + DELS + VL IL+ DD W E D + G PS+ +E
Sbjct: 6 HPYVSQEPDELSLELADVLNILDKTDD-GWIFGERLHDQERGWFPSSVVE 54
>gnl|CDD|212926 cd11993, SH3_Intersectin1_4, Fourth Src homology 3 domain (or SH3D)
of Intersectin-1. Intersectin-1 (ITSN1) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN1 localizes in membranous organelles, CCPs, the
Golgi complex, and may be involved in the cell membrane
trafficking system. It exists in alternatively spliced
short and long isoforms. The short isoform contains two
Eps15 homology domains (EH1 and EH2), a coiled-coil
region and five SH3 domains (SH3A-E), while the long
isoform, in addition, contains RhoGEF (also called
Dbl-homologous or DH), Pleckstrin homology (PH) and C2
domains. The fourth SH3 domain (or SH3D) of ITSN1 has
been shown to bind SHIP2, Numb, CdGAP, and N-WASP. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 65
Score = 35.9 bits (82), Expect = 0.002
Identities = 19/60 (31%), Positives = 29/60 (48%), Gaps = 7/60 (11%)
Query: 152 PEECLVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARK-----GLFPATYI 206
PE + Q + +T P +L G +I + ++ WW GE+ AR G FPA Y+
Sbjct: 3 PE--IAQVIASYTATGPEQLTLAPGQLILIRKKNPGGWWEGELQARGKKRQIGWFPANYV 60
>gnl|CDD|212781 cd11847, SH3_Brk, Src homology 3 domain of Brk (Breast tumor
kinase) Protein Tyrosine Kinase (PTK), also called PTK6.
Brk is a cytoplasmic (or non-receptor) PTK with limited
homology to Src kinases. It has been found to be
overexpressed in a majority of breast tumors. It plays
roles in normal cell differentiation, proliferation,
survival, migration, and cell cycle progression. Brk
substrates include RNA-binding proteins (SLM-1/2,
Sam68), transcription factors (STAT3/5), and signaling
molecules (Akt, paxillin, IRS-4). Src kinases in general
contain an N-terminal SH4 domain with a myristoylation
site, followed by SH3 and SH2 domains, a tyr kinase
domain, and a regulatory C-terminal region containing a
conserved tyr; they are activated by autophosphorylation
at the tyr kinase domain, but are negatively regulated
by phosphorylation at the C-terminal tyr by Csk
(C-terminal Src Kinase). However, Brk lacks the
N-terminal myristoylation site. The SH3 domain of Src
kinases contributes to substrate recruitment by binding
adaptor proteins/substrates, and regulation of kinase
activity through an intramolecular interaction. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 35.6 bits (82), Expect = 0.002
Identities = 16/53 (30%), Positives = 23/53 (43%), Gaps = 5/53 (9%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWH---GEIGAR--KGLFPATYI 206
AL+DF + EL F+ GD + +RS W G +G P Y+
Sbjct: 4 ALWDFKARGDEELSFQAGDQFRIAERSGDWWTALKLDRAGGVVAQGFVPNNYL 56
Score = 29.1 bits (65), Expect = 0.51
Identities = 15/52 (28%), Positives = 25/52 (48%), Gaps = 8/52 (15%)
Query: 8 DFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGK------EGLIPSNYI 53
DF A ++ELSF+ +I D W+ A + +G +P+NY+
Sbjct: 7 DFKARGDEELSFQAGDQFRIAERSGD--WWTALKLDRAGGVVAQGFVPNNYL 56
>gnl|CDD|198273 cd10410, SH2_SH2B1, Src homology 2 (SH2) domain found in SH2B
adapter proteins (SH2B1, SH2B2, SH2B3). SH2B1 (SH2-B,
PSM), like other members of the SH2B adapter protein
family, contains a pleckstrin homology domain, at least
one dimerization domain, and a C-terminal SH2 domain
which binds to phosphorylated tyrosines in a variety of
tyrosine kinases. SH2B1 and SH2B2 function in
signaling pathways found downstream of growth hormone
receptor and receptor tyrosine kinases, including the
insulin, insulin-like growth factor-I (IGF-I),
platelet-derived growth factor (PDGF), nerve growth
factor, hepatocyte growth factor, and fibroblast growth
factor receptors. SH2B2beta, a new isoform of SH2B2, is
an endogenous inhibitor of SH2B1 and/or SH2B2
(SH2B2alpha), negatively regulating insulin signaling
and/or JAK2-mediated cellular responses. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 97
Score = 36.9 bits (85), Expect = 0.002
Identities = 19/84 (22%), Positives = 44/84 (52%), Gaps = 3/84 (3%)
Query: 55 MKNHDWYYGRITRADAERLL---SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLR 111
+ + W++G ++R A +L+ G FL+R SE+ G++ L+ +H ++
Sbjct: 5 LSGYPWFHGMLSRLKAAQLVLEGGTGSHGVFLVRQSETRRGEYVLTFNFQGKAKHLRLSL 64
Query: 112 DSSGKFFLWVVKFNSLNELVEYHR 135
+ G+ + + F S+ +++E+ R
Sbjct: 65 NEEGQCRVQHLWFQSIFDMLEHFR 88
Score = 36.9 bits (85), Expect = 0.002
Identities = 19/84 (22%), Positives = 44/84 (52%), Gaps = 3/84 (3%)
Query: 234 MKNHDWYYGRITRADAERLL---SNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLR 290
+ + W++G ++R A +L+ G FL+R SE+ G++ L+ +H ++
Sbjct: 5 LSGYPWFHGMLSRLKAAQLVLEGGTGSHGVFLVRQSETRRGEYVLTFNFQGKAKHLRLSL 64
Query: 291 DSSGKFFLWVVKFNSLNELVEYHR 314
+ G+ + + F S+ +++E+ R
Sbjct: 65 NEEGQCRVQHLWFQSIFDMLEHFR 88
>gnl|CDD|212736 cd11802, SH3_Endophilin_B, Src homology 3 domain of Endophilin-B.
Endophilins play roles in synaptic vesicle formation,
virus budding, mitochondrial morphology maintenance,
receptor-mediated endocytosis inhibition, and endosomal
sorting. They are classified into two types, A and B.
Vertebrates contain two endophilin-B isoforms.
Endophilin-B proteins are cytoplasmic proteins expressed
mainly in the heart, placenta, and skeletal muscle.
Endophilins contain an N-terminal N-BAR domain (BAR
domain with an additional N-terminal amphipathic helix),
followed by a variable region containing proline
clusters, and a C-terminal SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 52
Score = 35.3 bits (82), Expect = 0.002
Identities = 16/49 (32%), Positives = 25/49 (51%), Gaps = 2/49 (4%)
Query: 159 ALYDFTPQEPGELEFRRGDVITV--TDRSDQHWWHGEIGARKGLFPATY 205
LYD+ ++ EL +VITV D+ + GE G+++G P Y
Sbjct: 4 VLYDYDAEDSTELSLLADEVITVYELPGMDEDYMMGERGSQRGKVPVAY 52
Score = 30.3 bits (69), Expect = 0.14
Identities = 12/51 (23%), Positives = 23/51 (45%), Gaps = 1/51 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMED-DMNWYRAELDGKEGLIPSNY 52
A +D++A ELS +V+ + + D ++ E + G +P Y
Sbjct: 2 ARVLYDYDAEDSTELSLLADEVITVYELPGMDEDYMMGERGSQRGKVPVAY 52
>gnl|CDD|198174 cd09918, SH2_Nterm_SPT6_like, N-terminal Src homology 2 (SH2)
domain found in Spt6. N-terminal SH2 domain in Spt6.
Spt6 is an essential transcription elongation factor and
histone chaperone that binds the C-terminal repeat
domain (CTD) of RNA polymerase II. Spt6 contains a
tandem SH2 domain with a novel structure and CTD-binding
mode. The tandem SH2 domain binds to a serine
2-phosphorylated CTD peptide in vitro, whereas its
N-terminal SH2 subdomain does not. CTD binding requires
a positively charged crevice in the C-terminal SH2
subdomain, which lacks the canonical phospho-binding
pocket of SH2 domains. The tandem SH2 domain is
apparently required for transcription elongation in vivo
as its deletion in cells is lethal in the presence of
6-azauracil. In general SH2 domains are involved in
signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 85
Score = 36.1 bits (84), Expect = 0.003
Identities = 18/78 (23%), Positives = 32/78 (41%), Gaps = 8/78 (10%)
Query: 65 ITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGV-QHFKVL-RDSSGKFFLWVV 122
+ AE L +K G +IR S +++ K +DGV QH + + F L
Sbjct: 8 VNYKQAEAYLKSKDVGEVVIRPSSKGVDHLTVTWKVADGVYQHIDIEELNKENPFSLGKE 67
Query: 123 ------KFNSLNELVEYH 134
++ L+E++
Sbjct: 68 LIIGGEEYEDLDEIIARF 85
Score = 36.1 bits (84), Expect = 0.003
Identities = 18/78 (23%), Positives = 32/78 (41%), Gaps = 8/78 (10%)
Query: 244 ITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGV-QHFKVL-RDSSGKFFLWVV 301
+ AE L +K G +IR S +++ K +DGV QH + + F L
Sbjct: 8 VNYKQAEAYLKSKDVGEVVIRPSSKGVDHLTVTWKVADGVYQHIDIEELNKENPFSLGKE 67
Query: 302 ------KFNSLNELVEYH 313
++ L+E++
Sbjct: 68 LIIGGEEYEDLDEIIARF 85
>gnl|CDD|212999 cd12066, SH3_GRAF3, Src Homology 3 domain of GTPase Regulator
Associated with Focal adhesion kinase 3. GRAF3 is also
called Rho GTPase activating protein 42 (ARHGAP42) or
ARHGAP10-like. Though its function has not been
characterized, it may be a GAP with activity towards
RhoA and Cdc42, based on its similarity to GRAF and
GRAF2. It contains an N-terminal BAR domain, followed
by a Pleckstrin homology (PH) domain, a Rho GAP domain,
and a C-terminal SH3 domain. The SH3 domain of GRAF and
GRAF2 binds PKNbeta, a target of the small GTPase Rho.
SH3 domains bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs; they play a role in the regulation of enzymes
by intramolecular interactions, changing the
subcellular localization of signal pathway components
and mediate multiprotein complex assemblies.
Length = 55
Score = 35.4 bits (81), Expect = 0.003
Identities = 16/53 (30%), Positives = 26/53 (49%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
+A A + A ELSF + + + + W +A +GK GL+P NY+
Sbjct: 1 QAKAMYSCKAEHSHELSFPQGAIFSNVYPSVEPGWLKATYEGKTGLVPENYVV 53
Score = 31.2 bits (70), Expect = 0.081
Identities = 9/19 (47%), Positives = 13/19 (68%)
Query: 215 WYRAELDGKEGLIPSNYIE 233
W +A +GK GL+P NY+
Sbjct: 35 WLKATYEGKTGLVPENYVV 53
>gnl|CDD|212804 cd11871, SH3_p67phox_N, N-terminal (or first) Src Homology 3
domain of the p67phox subunit of NADPH oxidase.
p67phox, also called Neutrophil cytosol factor 2
(NCF-2), is a cytosolic subunit of the phagocytic NADPH
oxidase complex (also called Nox2 or gp91phox) which
plays a crucial role in the cellular response to
bacterial infection. NADPH oxidase catalyzes the
transfer of electrons from NADPH to oxygen during
phagocytosis forming superoxide and reactive oxygen
species. p67phox plays a regulatory role and contains
N-terminal TPR, first SH3 (or N-terminal or central
SH3), PB1, and C-terminal SH3 domains. It binds, via
its C-terminal SH3 domain, to a proline-rich region of
p47phox and upon activation, this complex assembles
with flavocytochrome b558, the Nox2-p22phox
heterodimer. Concurrently, RacGTP translocates to the
membrane and interacts with the TPR domain of p67phox,
which leads to the activation of NADPH oxidase. The PB1
domain of p67phox binds to its partner PB1 domain in
p40phox, and this facilitates the assembly of
p47phox-p67phox at the membrane. The N-terminal SH3
domain increases the affinity of p67phox for the
oxidase complex. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 34.9 bits (80), Expect = 0.004
Identities = 14/48 (29%), Positives = 26/48 (54%), Gaps = 1/48 (2%)
Query: 7 HDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
++F ++EL ++ +L D NW +GK+GL+P N++E
Sbjct: 6 YEFVPETKEELQVLPGNIVFVLKKGTD-NWATVVFNGKKGLVPCNFLE 52
Score = 33.7 bits (77), Expect = 0.012
Identities = 19/74 (25%), Positives = 32/74 (43%), Gaps = 26/74 (35%)
Query: 160 LYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYRAE 219
LY+F P+ EL+ G+++ V + +W AT + N
Sbjct: 5 LYEFVPETKEELQVLPGNIVFVLKKGTDNW-------------ATVVFN----------- 40
Query: 220 LDGKEGLIPSNYIE 233
GK+GL+P N++E
Sbjct: 41 --GKKGLVPCNFLE 52
>gnl|CDD|212780 cd11846, SH3_Srms, Src homology 3 domain of Srms Protein Tyrosine
Kinase. Src-related kinase lacking C-terminal
regulatory tyrosine and N-terminal myristoylation sites
(Srms) is a cytoplasmic (or non-receptor) PTK with
limited homology to Src kinases. Src kinases in general
contain an N-terminal SH4 domain with a myristoylation
site, followed by SH3 and SH2 domains, a tyr kinase
domain, and a regulatory C-terminal region containing a
conserved tyr; they are activated by autophosphorylation
at the tyr kinase domain, but are negatively regulated
by phosphorylation at the C-terminal tyr by Csk
(C-terminal Src Kinase). However, Srms lacks the
N-terminal myristoylation sites. Src proteins are
involved in signaling pathways that regulate cytokine
and growth factor responses, cytoskeleton dynamics, cell
proliferation, survival, and differentiation. The SH3
domain of Src kinases contributes to substrate
recruitment by binding adaptor proteins/substrates, and
regulation of kinase activity through an intramolecular
interaction. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 34.8 bits (80), Expect = 0.004
Identities = 21/60 (35%), Positives = 28/60 (46%), Gaps = 12/60 (20%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARK-------GLFPATYILN 208
L ALYDFT + EL +GD + V + + I ARK GL PA+Y+
Sbjct: 1 LFTALYDFTARSTHELSVEQGDKLCVIEEEGDY-----IFARKLTGNPESGLVPASYVAQ 55
Score = 32.4 bits (74), Expect = 0.031
Identities = 17/52 (32%), Positives = 28/52 (53%), Gaps = 3/52 (5%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGK--EGLIPSNYI 53
A +DF A + ELS + L ++ E D + R +L G GL+P++Y+
Sbjct: 3 TALYDFTARSTHELSVEQGDKLCVIEEEGDYIFAR-KLTGNPESGLVPASYV 53
>gnl|CDD|198275 cd10412, SH2_SH2B3, Src homology 2 (SH2) domain found in SH2B
adapter proteins (SH2B1, SH2B2, SH2B3). SH2B3 (Lnk),
like other members of the SH2B adapter protein family,
contains a pleckstrin homology domain, at least one
dimerization domain, and a C-terminal SH2 domain which
binds to phosphorylated tyrosines in a variety of
tyrosine kinases. SH2B3 negatively regulates
lymphopoiesis and early hematopoiesis. The
lnk-deficiency results in enhanced production of B
cells, and expansion as well as enhanced function of
hematopoietic stem cells (HSCs), demonstrating negative
regulatory functions of Sh2b3/Lnk in cytokine signaling.
Sh2b3/Lnk also functions in responses controlled by cell
adhesion and in crosstalk between integrin- and
cytokine-mediated signaling. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 97
Score = 36.0 bits (83), Expect = 0.004
Identities = 18/79 (22%), Positives = 41/79 (51%), Gaps = 3/79 (3%)
Query: 60 WYYGRITRADAERLLSNK---HEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGK 116
W++G I+R A +L+ + G FL+R SE+ G++ L+ +H ++ G+
Sbjct: 10 WFHGPISRVKAAQLVQLQGPDAHGVFLVRQSETRRGEYVLTFNFQGRAKHLRLSLTERGQ 69
Query: 117 FFLWVVKFNSLNELVEYHR 135
+ + F S+ +++ + +
Sbjct: 70 CRVQHLHFPSVVDMLHHFQ 88
Score = 36.0 bits (83), Expect = 0.004
Identities = 18/79 (22%), Positives = 41/79 (51%), Gaps = 3/79 (3%)
Query: 239 WYYGRITRADAERLLSNK---HEGAFLIRVSESSPGDFSLSVKCSDGVQHFKVLRDSSGK 295
W++G I+R A +L+ + G FL+R SE+ G++ L+ +H ++ G+
Sbjct: 10 WFHGPISRVKAAQLVQLQGPDAHGVFLVRQSETRRGEYVLTFNFQGRAKHLRLSLTERGQ 69
Query: 296 FFLWVVKFNSLNELVEYHR 314
+ + F S+ +++ + +
Sbjct: 70 CRVQHLHFPSVVDMLHHFQ 88
>gnl|CDD|212876 cd11943, SH3_JIP1, Src homology 3 domain of JNK-interacting protein
1. JNK-interacting protein 1 (JIP1) is also called
Islet-brain 1 (IB1) or Mitogen-activated protein kinase
8-interacting protein 1 (MAPK8IP1). It is highly
expressed in neurons, where it functions as an adaptor
linking motor to cargo during axonal transport. It also
affects microtubule dynamics in neurons. JIP1 is also
found in pancreatic beta-cells, where it is involved in
regulating insulin secretion. In addition to a JNK
binding domain, JIP1 also contains SH3 and
Phosphotyrosine-binding (PTB) domains. Its SH3 domain
homodimerizes at the interface usually involved in
proline-rich ligand recognition, despite the lack of
this motif in the domain itself. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 35.0 bits (80), Expect = 0.004
Identities = 18/51 (35%), Positives = 29/51 (56%), Gaps = 4/51 (7%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHG---EIGARKGLFPATY 205
+A++ F P+ P ELE D + V +++ +W+ GAR G+FPA Y
Sbjct: 3 RAVFRFVPRHPDELELEVDDPLLVEVQAEDYWYEAYNMRTGAR-GIFPAYY 52
>gnl|CDD|212805 cd11872, SH3_DOCK_AB, Src Homology 3 domain of Class A and B
Dedicator of Cytokinesis proteins. DOCK proteins are
atypical guanine nucleotide exchange factors (GEFs) that
lack the conventional Dbl homology (DH) domain. They are
divided into four classes (A-D) based on sequence
similarity and domain architecture: class A includes
Dock1, 2 and 5; class B includes Dock3 and 4; class C
includes Dock6, 7, and 8; and class D includes Dock9, 10
and 11. All DOCKs contain two homology domains: the
DHR-1 (Dock homology region-1), also called CZH1 (CED-5,
Dock180, and MBC-zizimin homology 1), and DHR-2 (also
called CZH2 or Docker). The DHR-1 domain binds
phosphatidylinositol-3,4,5-triphosphate while DHR-2
contains the catalytic activity for Rac and/or Cdc42.
This subfamily includes only Class A and B DOCKs, which
also contain an SH3 domain at the N-terminal region and
a PxxP motif at the C-terminus. Class A/B DOCKs are
mostly specific GEFs for Rac, except Dock4 which
activates the Ras family GTPase Rap1, probably
indirectly through interaction with Rap regulatory
proteins. The SH3 domain of class A/B DOCKs have been
shown to bind Elmo, a scaffold protein that promotes GEF
activity of DOCKs by releasing DHR-2 autoinhibition by
the intramolecular SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 34.9 bits (81), Expect = 0.005
Identities = 13/51 (25%), Positives = 27/51 (52%), Gaps = 4/51 (7%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHG-EIGAR--KGLFPATYI 206
A+Y+F +L + GD + + + + W+ G + + KG+FP +Y+
Sbjct: 4 AIYNFQGDGEHQLSLQVGDTVQILEECE-GWYRGFSLRNKSLKGIFPKSYV 53
Score = 34.5 bits (80), Expect = 0.005
Identities = 15/57 (26%), Positives = 28/57 (49%), Gaps = 5/57 (8%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAEL---DGKEGLIPSNYIEMK 56
+A ++F E +LS + ++IL E+ WYR +G+ P +Y+ +K
Sbjct: 2 GVAIYNFQGDGEHQLSLQVGDTVQIL--EECEGWYRGFSLRNKSLKGIFPKSYVHIK 56
>gnl|CDD|212836 cd11903, SH3_Nck2_3, Third Src Homology 3 domain of Nck2 adaptor
protein. Nck2 (also called Nckbeta or Growth factor
receptor-bound protein 4, Grb4) plays a crucial role in
connecting signaling pathways of tyrosine kinase
receptors and important effectors in actin dynamics and
cytoskeletal remodeling. It binds neuronal signaling
proteins such as ephrinB and Disabled-1 (Dab-1)
exclusively. Nck adaptor proteins regulate actin
cytoskeleton dynamics by linking proline-rich effector
molecules to protein tyrosine kinases and
phosphorylated signaling intermediates. They contain
three SH3 domains and a C-terminal SH2 domain. They
function downstream of the PDGFbeta receptor and are
involved in Rho GTPase signaling and actin dynamics.
Vertebrates contain two Nck adaptor proteins: Nck1
(also called Nckalpha) and Nck2, which show partly
overlapping functions but also bind distinct targets.
The third SH3 domain of Nck appears to prefer ligands
with a PxAPxR motif. SH3 domains are protein
interaction domains that usually bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially a PxxP motif. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 59
Score = 35.0 bits (80), Expect = 0.005
Identities = 15/47 (31%), Positives = 31/47 (65%), Gaps = 2/47 (4%)
Query: 9 FNATAEDELSFRKSQVLKILNM-EDDMNWYRAE-LDGKEGLIPSNYI 53
F++ E+EL+F K + ++++ E+D W++ + G+ GL+P NY+
Sbjct: 9 FSSVTEEELNFEKGETMEVIEKPENDPEWWKCKNSRGQVGLVPKNYV 55
Score = 31.2 bits (70), Expect = 0.096
Identities = 18/59 (30%), Positives = 30/59 (50%), Gaps = 11/59 (18%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDR--SDQHWW-----HGEIGARKGLFPATYIL 207
+VQ LY F+ EL F +G+ + V ++ +D WW G++ GL P Y++
Sbjct: 2 VVQTLYPFSSVTEEELNFEKGETMEVIEKPENDPEWWKCKNSRGQV----GLVPKNYVV 56
>gnl|CDD|212971 cd12038, SH3_MPP6, Src Homology 3 domain of Membrane Protein,
Palmitoylated 6 (or MAGUK p55 subfamily member 6).
MPP6, also called Veli-associated MAGUK 1 (VAM-1) or
PALS2, is a scaffolding protein that binds to Veli-1, a
homolog of Caenorhabditis Lin-7. It is one of seven
vertebrate homologs of the Drosophila Stardust protein,
which is required in establishing cell polarity, and it
contains two L27 domains followed by the core of three
domains characteristic of MAGUK (membrane-associated
guanylate kinase) proteins: PDZ, SH3, and guanylate
kinase (GuK). In addition, it also contains the Hook
(Protein 4.1 Binding) motif in between the SH3 and GuK
domains. The GuK domain in MAGUK proteins is
enzymatically inactive; instead, the domain mediates
protein-protein interactions and associates
intramolecularly with the SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 61
Score = 34.7 bits (79), Expect = 0.005
Identities = 13/48 (27%), Positives = 27/48 (56%), Gaps = 3/48 (6%)
Query: 162 DFTPQEPGELEFRRGDVITVTDRSDQHWW---HGEIGARKGLFPATYI 206
+ P + L+F +G+++ + +R D +WW H + G GL P+ ++
Sbjct: 14 NLIPCKEAGLKFSKGEILQIVNREDPNWWQASHVKEGGSAGLIPSQFL 61
Score = 32.7 bits (74), Expect = 0.031
Identities = 18/43 (41%), Positives = 27/43 (62%), Gaps = 4/43 (9%)
Query: 14 EDELSFRKSQVLKILNMEDDMNWYRA---ELDGKEGLIPSNYI 53
E L F K ++L+I+N ED NW++A + G GLIPS ++
Sbjct: 20 EAGLKFSKGEILQIVNREDP-NWWQASHVKEGGSAGLIPSQFL 61
>gnl|CDD|198245 cd10382, SH2_SOCS1, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 98
Score = 35.8 bits (83), Expect = 0.005
Identities = 25/79 (31%), Positives = 42/79 (53%), Gaps = 7/79 (8%)
Query: 59 DWYYGRITRADAERLLSNKHEGAFLIRVSESSPGD--FSLSVKCSDGVQHFKVLRDSSGK 116
+Y+G ++ +A L + G FLIR +S + F+LSVK + G ++L +GK
Sbjct: 11 GFYWGPLSVEEAHAKLKREPVGTFLIR--DSRQKNCFFALSVKMASGPVSIRILF-KAGK 67
Query: 117 FFL--WVVKFNSLNELVEY 133
F L F+ L +L+E+
Sbjct: 68 FSLDGSKESFDCLFKLLEH 86
Score = 35.8 bits (83), Expect = 0.005
Identities = 25/79 (31%), Positives = 42/79 (53%), Gaps = 7/79 (8%)
Query: 238 DWYYGRITRADAERLLSNKHEGAFLIRVSESSPGD--FSLSVKCSDGVQHFKVLRDSSGK 295
+Y+G ++ +A L + G FLIR +S + F+LSVK + G ++L +GK
Sbjct: 11 GFYWGPLSVEEAHAKLKREPVGTFLIR--DSRQKNCFFALSVKMASGPVSIRILF-KAGK 67
Query: 296 FFL--WVVKFNSLNELVEY 312
F L F+ L +L+E+
Sbjct: 68 FSLDGSKESFDCLFKLLEH 86
>gnl|CDD|212693 cd11759, SH3_CRK_C, C-terminal Src Homology 3 domain of Ct10
Regulator of Kinase adaptor proteins. CRK adaptor
proteins consists of SH2 and SH3 domains, which bind
tyrosine-phosphorylated peptides and proline-rich
motifs, respectively. They function downstream of
protein tyrosine kinases in many signaling pathways
started by various extracellular signals, including
growth and differentiation factors. Cellular CRK (c-CRK)
contains a single SH2 domain, followed by N-terminal and
C-terminal SH3 domains. It is involved in the regulation
of many cellular processes including cell growth,
motility, adhesion, and apoptosis. CRK has been
implicated in the malignancy of various human cancers.
The C-terminal SH3 domain of CRK has not been shown to
bind any target protein; it acts as a negative regulator
of CRK function by stabilizing a structure that inhibits
the access by target proteins to the N-terminal SH3
domain. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes by intramolecular interactions,
changing the subcellular localization of signal pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 34.8 bits (80), Expect = 0.005
Identities = 12/40 (30%), Positives = 20/40 (50%)
Query: 167 EPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ L GD++ VT + W GE+ + G FP T++
Sbjct: 16 DKTALALEVGDLVKVTKINVSGQWEGELNGKVGHFPFTHV 55
>gnl|CDD|213007 cd12074, SH3_Tks5_1, First Src homology 3 domain of Tyrosine kinase
substrate with five SH3 domains. Tks5, also called SH3
and PX domain-containing protein 2A (SH3PXD2A) or Five
SH (FISH), is a scaffolding protein and Src substrate
that is localized in podosomes, which are electron-dense
structures found in Src-transformed fibroblasts,
osteoclasts, macrophages, and some invasive cancer
cells. It binds and regulates some members of the ADAMs
family of transmembrane metalloproteases, which function
as sheddases and mediators of cell and matrix
interactions. It is required for podosome formation,
degradation of the extracellular matrix, and cancer cell
invasion. Tks5 contains an N-terminal Phox homology (PX)
domain and five SH3 domains. This model characterizes
the first SH3 domain of Tks5. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 34.7 bits (79), Expect = 0.005
Identities = 13/45 (28%), Positives = 25/45 (55%)
Query: 162 DFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
++ QE E+ + G+V+ V ++++ WW +G PATY+
Sbjct: 7 NYEKQENSEISLQAGEVVDVIEKNESGWWFVSTAEEQGWVPATYL 51
>gnl|CDD|212795 cd11861, SH3_DLG-like, Src Homology 3 domain of Disks large homolog
proteins. The DLG-like proteins are scaffolding
proteins that cluster at synapses and are also called
PSD (postsynaptic density)-95 proteins or SAPs
(synapse-associated proteins). They play important roles
in synaptic development and plasticity, cell polarity,
migration and proliferation. They are members of the
MAGUK (membrane-associated guanylate kinase) protein
family, which is characterized by the presence of a core
of three domains: PDZ, SH3, and guanylate kinase (GuK).
The GuK domain in MAGUK proteins is enzymatically
inactive; instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. DLG-like proteins contain three PDZ domains
and varying N-terminal regions. All DLG proteins exist
as alternatively-spliced isoforms. Vertebrates contain
four DLG proteins from different genes, called DLG1-4.
DLG4 and DLG2 are found predominantly at postsynaptic
sites and they mediate surface ion channel and receptor
clustering. DLG3 is found axons and some presynaptic
terminals. DLG1 interacts with AMPA-type glutamate
receptors and is critical in their maturation and
delivery to synapses. The SH3 domain of DLG4 binds and
clusters the kainate subgroup of glutamate receptors via
two proline-rich sequences in their C-terminal tail. It
also binds AKAP79/150 (A-kinase anchoring protein). SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 61
Score = 34.6 bits (80), Expect = 0.005
Identities = 15/39 (38%), Positives = 22/39 (56%), Gaps = 5/39 (12%)
Query: 157 VQALYDFTPQEPG-----ELEFRRGDVITVTDRSDQHWW 190
V+AL+D+ P L F+ GD++ VT+ SD WW
Sbjct: 2 VRALFDYDPSRDSGLPSQGLSFKFGDILHVTNASDDEWW 40
>gnl|CDD|213001 cd12068, SH3_MYO15B, Src Homology 3 domain of Myosin XVb. Myosin
XVb, also called KIAA1783, was named based on its
similarity with myosin XVa. It is a transcribed and
unprocessed pseudogene whose predicted amino acid
sequence contains mutated or deleted amino acid residues
that are normally conserved and important for myosin
function. The related myosin XVa is important for normal
growth of mechanosensory stereocilia of inner ear hair
cells. Myosin XVa contains a unique N-terminal extension
followed by a motor domain, light chain-binding IQ
motifs, and a tail consisting of a pair of MyTH4-FERM
tandems separated by a SH3 domain, and a PDZ domain. SH3
domains bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs;
they play a role in the regulation of enzymes by
intramolecular interactions, changing the subcellular
localization of signal pathway components and mediate
multiprotein complex assemblies.
Length = 55
Score = 34.5 bits (79), Expect = 0.006
Identities = 18/49 (36%), Positives = 24/49 (48%), Gaps = 2/49 (4%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRS--DQHWWHGEIGARKGLFPA 203
V AL + + L F RGD+I + + + W G G R GLFPA
Sbjct: 2 VVALRSYITDDKSLLSFHRGDLIKLLPMAGLEPGWQFGSTGGRSGLFPA 50
>gnl|CDD|213013 cd12080, SH3_MPP1, Src Homology 3 domain of Membrane Protein,
Palmitoylated 1 (or MAGUK p55 subfamily member 1).
MPP1, also called 55 kDa erythrocyte membrane protein
(p55), is a ubiquitously-expressed scaffolding protein
that plays roles in regulating neutrophil polarity, cell
shape, hair cell development, and neural development and
patterning of the retina. It was originally identified
as an erythrocyte protein that stabilizes the actin
cytoskeleton to the plasma membrane by forming a complex
with 4.1R protein and glycophorin C. MPP1 is one of
seven vertebrate homologs of the Drosophila Stardust
protein, which is required in establishing cell
polarity, and it contains the three domains
characteristic of MAGUK (membrane-associated guanylate
kinase) proteins: PDZ, SH3, and guanylate kinase (GuK).
In addition, it also contains the Hook (Protein 4.1
Binding) motif in between the SH3 and GuK domains. The
GuK domain in MAGUK proteins is enzymatically inactive;
instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 62
Score = 34.5 bits (79), Expect = 0.006
Identities = 14/46 (30%), Positives = 27/46 (58%), Gaps = 9/46 (19%)
Query: 157 VQALYDFTP--------QEPGELEFRRGDVITVTDRSDQHWWHGEI 194
++A +D+ P +E G L+F+ GD+I + ++ D +WW G +
Sbjct: 2 MRAQFDYDPKKDNLIPCKEAG-LKFQTGDIIQIINKDDSNWWQGRV 46
>gnl|CDD|212835 cd11902, SH3_Nck2_2, Second Src Homology 3 domain of Nck2 adaptor
protein. Nck2 (also called Nckbeta or Growth factor
receptor-bound protein 4, Grb4) plays a crucial role in
connecting signaling pathways of tyrosine kinase
receptors and important effectors in actin dynamics and
cytoskeletal remodeling. It binds neuronal signaling
proteins such as ephrinB and Disabled-1 (Dab-1)
exclusively. Nck adaptor proteins regulate actin
cytoskeleton dynamics by linking proline-rich effector
molecules to protein tyrosine kinases and phosphorylated
signaling intermediates. They contain three SH3 domains
and a C-terminal SH2 domain. They function downstream of
the PDGFbeta receptor and are involved in Rho GTPase
signaling and actin dynamics. Vertebrates contain two
Nck adaptor proteins: Nck1 (also called Nckalpha) and
Nck2, which show partly overlapping functions but also
bind distinct targets. The second SH3 domain of Nck
appears to prefer ligands containing the APxxPxR motif.
SH3 domains are protein interaction domains that usually
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially a PxxP motif. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 33.8 bits (77), Expect = 0.010
Identities = 12/47 (25%), Positives = 23/47 (48%)
Query: 161 YDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYIL 207
+ + + EL +G +TV ++ WW G + G FP+ Y++
Sbjct: 7 FAYVAEREDELSLVKGSRVTVMEKCSDGWWRGSYNGQIGWFPSNYVV 53
Score = 33.4 bits (76), Expect = 0.014
Identities = 18/51 (35%), Positives = 26/51 (50%), Gaps = 1/51 (1%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
A K + A EDELS K + ++ D W+R +G+ G PSNY+
Sbjct: 3 AFVKFAYVAEREDELSLVKGSRVTVMEKCSD-GWWRGSYNGQIGWFPSNYV 52
>gnl|CDD|212921 cd11988, SH3_Intersectin2_1, First Src homology 3 domain (or SH3A)
of Intersectin-2. Intersectin-2 (ITSN2) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN2 also functions as a specific GEF for Cdc42
activation in epithelial morphogenesis, and is required
in mitotic spindle orientation. It exists in
alternatively spliced short and long isoforms. The short
isoform contains two Eps15 homology domains (EH1 and
EH2), a coiled-coil region and five SH3 domains
(SH3A-E), while the long isoform, in addition, contains
RhoGEF (also called Dbl-homologous or DH), Pleckstrin
homology (PH) and C2 domains. The first SH3 domain (or
SH3A) of ITSN2 is expected to bind many protein
partners, similar to ITSN1 which has been shown to bind
Sos1, dynamin1/2, CIN85, c-Cbl, PI3K-C2, SHIP2, N-WASP,
and CdGAP, among others. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 33.7 bits (77), Expect = 0.011
Identities = 16/51 (31%), Positives = 26/51 (50%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRS--DQHWWHGEIGARKGLFPATYI 206
+ALY F + E+ F GD+I V +++ + W +G G FP Y+
Sbjct: 5 RALYPFEARNHDEMSFNAGDIIQVDEKTVGEPGWLYGSFQGNFGWFPCNYV 55
Score = 27.9 bits (62), Expect = 1.4
Identities = 14/51 (27%), Positives = 22/51 (43%), Gaps = 1/51 (1%)
Query: 5 AKHDFNATAEDELSFRKSQVLKI-LNMEDDMNWYRAELDGKEGLIPSNYIE 54
A + F A DE+SF ++++ + W G G P NY+E
Sbjct: 6 ALYPFEARNHDEMSFNAGDIIQVDEKTVGEPGWLYGSFQGNFGWFPCNYVE 56
>gnl|CDD|212984 cd12051, SH3_DOCK1_5_A, Src Homology 3 domain of Class A
Dedicator of Cytokinesis proteins 1 and 5. Dock1, also
called Dock180, and Dock5 are class A DOCKs and are
atypical guanine nucleotide exchange factors (GEFs)
that lack the conventional Dbl homology (DH) domain.
Dock1 interacts with the scaffold protein Elmo and the
resulting complex functions upstream of Rac in many
biological events including phagocytosis of apoptotic
cells, cell migration and invasion. Dock5 functions
upstream of Rac1 to regulate osteoclast function. All
DOCKs contain two homology domains: the DHR-1 (Dock
homology region-1), also called CZH1 (CED-5, Dock180,
and MBC-zizimin homology 1), and DHR-2 (also called
CZH2 or Docker). The DHR-1 domain binds
phosphatidylinositol-3,4,5-triphosphate while DHR-2
contains the catalytic activity for Rac and/or Cdc42.
Class A DOCKs also contain an SH3 domain at the
N-terminal region and a PxxP motif at the C-terminus;
they are specific GEFs for Rac. The SH3 domain of Dock1
binds to DHR-2 in an autoinhibitory manner; binding of
Elmo to the SH3 domain of Dock1 exposes the DHR-2
domain and promotes GEF activity. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 33.6 bits (77), Expect = 0.011
Identities = 17/57 (29%), Positives = 30/57 (52%), Gaps = 5/57 (8%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRA---ELDGKEGLIPSNYIEMK 56
+A ++++A DELS + + IL + WYR K+G+ P++YI +K
Sbjct: 2 GVAIYNYDARGPDELSLQIGDTVHILETYE--GWYRGYTLRKKSKKGIFPASYIHLK 56
Score = 31.3 bits (71), Expect = 0.078
Identities = 16/51 (31%), Positives = 31/51 (60%), Gaps = 4/51 (7%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHG---EIGARKGLFPATYI 206
A+Y++ + P EL + GD + + + + + W+ G ++KG+FPA+YI
Sbjct: 4 AIYNYDARGPDELSLQIGDTVHILE-TYEGWYRGYTLRKKSKKGIFPASYI 53
>gnl|CDD|198183 cd09929, SH2_BLNK_SLP-76, Src homology 2 (SH2) domain found in
B-cell linker (BLNK) protein and SH2 domain-containing
leukocyte protein of 76 kDa (SLP-76). BLNK (also known
as SLP-65 or BASH) is an important adaptor protein
expressed in B-lineage cells. BLNK consists of a
N-terminal sterile alpha motif (SAM) domain and a
C-terminal SH2 domain. BLNK is a cytoplasmic protein,
but a part of it is bound to the plasma membrane through
an N-terminal leucine zipper motif and transiently bound
to a cytoplasmic domain of Iga through its C-terminal
SH2 domain upon B cell antigen receptor
(BCR)-stimulation. A non-ITAM phosphotyrosine in Iga is
necessary for the binding with the BLNK SH2 domain
and/or for normal BLNK function in signaling and B cell
activation. Upon phosphorylation BLNK binds Btk and
PLCgamma2 through their SH2 domains and mediates
PLCgamma2 activation by Btk. BLNK also binds other
signaling molecules such as Vav, Grb2, Syk, and HPK1.
BLNK has been shown to be necessary for BCR-mediated
Ca2+ mobilization, for the activation of
mitogen-activated protein kinases such as ERK, JNK, and
p38 in a chicken B cell line DT40, and for activation of
transcription factors such as NF-AT and NF-kappaB in
human or mouse B cells. BLNK is involved in B cell
development, B cell survival, activation, proliferation,
and T-independent immune responses. BLNK is structurally
homologous to SLP-76. SLP-76 and (linker for activation
of T cells) LAT are adaptor/linker proteins in T cell
antigen receptor activation and T cell development. BLNK
interacts with many downstream signaling proteins that
interact directly with both SLP-76 and LAT. New data
suggest functional complementation of SLP-76 and LAT in
T cell antigen receptor function with BLNK in BCR
function. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 121
Score = 35.0 bits (81), Expect = 0.013
Identities = 27/94 (28%), Positives = 49/94 (52%), Gaps = 15/94 (15%)
Query: 54 EMKNHDWYYGRITRADAERLL--SNKHEGAFLIRVSESSPGD----FSLSVKCSDGVQHF 107
++ +WY G I R +AE L SNK +G FL+R +SS D ++L V +D V +
Sbjct: 7 DLLPKEWYAGNIDRKEAEEALRRSNK-DGTFLVR--DSSGKDSSQPYTLMVLYNDKVYNI 63
Query: 108 KVLRDSSGKFFLW------VVKFNSLNELVEYHR 135
++ + + + F+S+ E++E+H+
Sbjct: 64 QIRFLENTRQYALGTGLRGEETFSSVAEIIEHHQ 97
Score = 35.0 bits (81), Expect = 0.013
Identities = 27/94 (28%), Positives = 49/94 (52%), Gaps = 15/94 (15%)
Query: 233 EMKNHDWYYGRITRADAERLL--SNKHEGAFLIRVSESSPGD----FSLSVKCSDGVQHF 286
++ +WY G I R +AE L SNK +G FL+R +SS D ++L V +D V +
Sbjct: 7 DLLPKEWYAGNIDRKEAEEALRRSNK-DGTFLVR--DSSGKDSSQPYTLMVLYNDKVYNI 63
Query: 287 KVLRDSSGKFFLW------VVKFNSLNELVEYHR 314
++ + + + F+S+ E++E+H+
Sbjct: 64 QIRFLENTRQYALGTGLRGEETFSSVAEIIEHHQ 97
>gnl|CDD|213012 cd12079, SH3_Tks5_3, Third Src homology 3 domain of Tyrosine kinase
substrate with five SH3 domains. Tks5, also called SH3
and PX domain-containing protein 2A (SH3PXD2A) or Five
SH (FISH), is a scaffolding protein and Src substrate
that is localized in podosomes, which are electron-dense
structures found in Src-transformed fibroblasts,
osteoclasts, macrophages, and some invasive cancer
cells. It binds and regulates some members of the ADAMs
family of transmembrane metalloproteases, which function
as sheddases and mediators of cell and matrix
interactions. It is required for podosome formation,
degradation of the extracellular matrix, and cancer cell
invasion. Tks5 contains an N-terminal Phox homology (PX)
domain and five SH3 domains. This model characterizes
the third SH3 domain of Tks5. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 33.5 bits (76), Expect = 0.015
Identities = 12/36 (33%), Positives = 22/36 (61%)
Query: 171 LEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ FR G V +++ WW+ +IG ++G P++YI
Sbjct: 17 ISFRGGQKAEVIEKNSGGWWYVQIGEKEGWAPSSYI 52
Score = 29.6 bits (66), Expect = 0.27
Identities = 14/47 (29%), Positives = 27/47 (57%), Gaps = 1/47 (2%)
Query: 8 DFNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
+F + D +SFR Q +++ ++ W+ ++ KEG PS+YI+
Sbjct: 8 EFQSCISDGISFRGGQKAEVIE-KNSGGWWYVQIGEKEGWAPSSYID 53
>gnl|CDD|212695 cd11761, SH3_FCHSD_1, First Src Homology 3 domain of FCH and
double SH3 domains proteins. This group is composed of
FCH and double SH3 domains protein 1 (FCHSD1) and
FCHSD2. These proteins have a common domain structure
consisting of an N-terminal F-BAR (FES-CIP4 Homology
and Bin/Amphiphysin/Rvs), two SH3, and C-terminal
proline-rich domains. They have only been characterized
in silico and their functions remain unknown. This
group also includes the insect protein, nervous wreck,
which acts as a regulator of synaptic growth signaling.
SH3 domains are protein interaction domains that bind
to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 33.1 bits (76), Expect = 0.016
Identities = 13/47 (27%), Positives = 25/47 (53%), Gaps = 1/47 (2%)
Query: 9 FNATAEDELSFRKSQVLKILNMEDDMNWYRA-ELDGKEGLIPSNYIE 54
+ A DEL+ + + L+++ D W +A G+ G +P NY++
Sbjct: 10 YEAQRPDELTITEGEELEVIEDGDGDGWVKARNKSGEVGYVPENYLQ 56
Score = 25.8 bits (57), Expect = 7.7
Identities = 15/58 (25%), Positives = 22/58 (37%), Gaps = 10/58 (17%)
Query: 155 CLVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWW------HGEIGARKGLFPATYI 206
+ LY + Q P EL G+ + V + D W GE+ G P Y+
Sbjct: 2 VTCKVLYSYEAQRPDELTITEGEELEVIEDGDGDGWVKARNKSGEV----GYVPENYL 55
>gnl|CDD|213014 cd12081, SH3_CASK, Src Homology 3 domain of
Calcium/calmodulin-dependent Serine protein Kinase.
CASK is a scaffolding protein that is highly expressed
in the mammalian nervous system and plays roles in
synaptic protein targeting, neural development, and gene
expression regulation. CASK interacts with many
different binding partners including parkin, neurexin,
syndecans, calcium channel proteins, caskin, among
others, to perform specific functions in different
subcellular locations. Disruption of the CASK gene in
mice results in neonatal lethality while mutations in
the human gene have been associated with X-linked mental
retardation. Drosophila CASK is associated with both
pre- and postsynaptic membranes and is crucial in
synaptic transmission and vesicle cycling. CASK contains
an N-terminal calmodulin-dependent kinase (CaMK)-like
domain, two L27 domains, followed by the core of three
domains characteristic of MAGUK (membrane-associated
guanylate kinase) proteins: PDZ, SH3, and guanylate
kinase (GuK). In addition, it also contains the Hook
(Protein 4.1 Binding) motif in between the SH3 and GuK
domains. The GuK domain in MAGUK proteins is
enzymatically inactive; instead, the domain mediates
protein-protein interactions and associates
intramolecularly with the SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 62
Score = 33.3 bits (76), Expect = 0.018
Identities = 13/58 (22%), Positives = 26/58 (44%), Gaps = 11/58 (18%)
Query: 157 VQALYDFTPQE-------PGELEFRRGDVITVTDRSDQHWWHGE----IGARKGLFPA 203
V+A +++ P + + FR GD++ + + D +WW + GL P+
Sbjct: 2 VRAQFEYDPLKDDLIPCKQAGIRFRVGDILQIISKDDHNWWQAKLENSKNGTAGLIPS 59
Score = 33.0 bits (75), Expect = 0.025
Identities = 19/58 (32%), Positives = 34/58 (58%), Gaps = 14/58 (24%)
Query: 5 AKHDFNATAEDEL--------SFRKSQVLKILNMEDDMNWYRAELD----GKEGLIPS 50
A+ +++ +D+L FR +L+I++ +DD NW++A+L+ G GLIPS
Sbjct: 4 AQFEYDP-LKDDLIPCKQAGIRFRVGDILQIIS-KDDHNWWQAKLENSKNGTAGLIPS 59
Score = 27.2 bits (60), Expect = 2.5
Identities = 12/24 (50%), Positives = 17/24 (70%), Gaps = 4/24 (16%)
Query: 210 EDDMNWYRAELD----GKEGLIPS 229
+DD NW++A+L+ G GLIPS
Sbjct: 36 KDDHNWWQAKLENSKNGTAGLIPS 59
>gnl|CDD|212735 cd11801, SH3_JIP1_like, Src homology 3 domain of JNK-interacting
proteins 1 and 2, and similar domains. JNK-interacting
proteins (JIPs) function as scaffolding proteins for
c-Jun N-terminal kinase (JNK) signaling pathways. They
bind to components of Mitogen-activated protein kinase
(MAPK) pathways such as JNK, MKK, and several MAP3Ks
such as MLK and DLK. There are four JIPs (JIP1-4); all
contain a JNK binding domain. JIP1 and JIP2 also contain
SH3 and Phosphotyrosine-binding (PTB) domains. Both are
highly expressed in the brain and pancreatic beta-cells.
JIP1 functions as an adaptor linking motor to cargo
during axonal transport and also is involved in
regulating insulin secretion. JIP2 form complexes with
fibroblast growth factor homologous factors (FHFs),
which facilitates activation of the p38delta MAPK. The
SH3 domain of JIP1 homodimerizes at the interface
usually involved in proline-rich ligand recognition,
despite the lack of this motif in the domain itself. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 33.1 bits (76), Expect = 0.019
Identities = 18/51 (35%), Positives = 27/51 (52%), Gaps = 4/51 (7%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHG---EIGARKGLFPATYI 206
AL+ F P+ E+E GD + V +D W G G ++G+FPA Y+
Sbjct: 4 ALHKFIPRHEDEIELDIGDPVYVEQEADDLWCEGTNLRTG-QRGIFPAAYV 53
>gnl|CDD|212713 cd11779, SH3_Irsp53_BAIAP2L, Src Homology 3 domain of Insulin
Receptor tyrosine kinase Substrate p53, Brain-specific
Angiogenesis Inhibitor 1-Associated Protein 2
(BAIAP2)-Like proteins, and similar proteins. Proteins
in this family include IRSp53, BAIAP2L1, BAIAP2L2, and
similar proteins. They all contain an
Inverse-Bin/Amphiphysin/Rvs (I-BAR) or IMD domain in
addition to the SH3 domain. IRSp53, also known as
BAIAP2, is a scaffolding protein that takes part in many
signaling pathways including Cdc42-induced filopodia
formation, Rac-mediated lamellipodia extension, and
spine morphogenesis. IRSp53 exists as multiple splicing
variants that differ mainly at the C-termini. BAIAP2L1,
also called IRTKS (Insulin Receptor Tyrosine Kinase
Substrate), serves as a substrate for the insulin
receptor and binds the small GTPase Rac. It plays a role
in regulating the actin cytoskeleton and colocalizes
with F-actin, cortactin, VASP, and vinculin. IRSp53 and
IRTKS also mediate the recruitment of effector proteins
Tir and EspFu, which regulate host cell actin
reorganization, to bacterial attachment sites. BAIAP2L2
co-localizes with clathrin plaques but its function has
not been determined. The SH3 domains of IRSp53 and IRTKS
have been shown to bind the proline-rich C-terminus of
EspFu. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 33.1 bits (76), Expect = 0.019
Identities = 19/52 (36%), Positives = 24/52 (46%), Gaps = 3/52 (5%)
Query: 157 VQALYDFTPQEPGELEFRRGDVIT-VTDRSDQHWWHGE--IGARKGLFPATY 205
V+ALY +L F GDVIT + W +GE R+G FP Y
Sbjct: 3 VKALYPHAAGGETQLSFEEGDVITLLGPEPRDGWHYGENERSGRRGWFPIAY 54
>gnl|CDD|212875 cd11942, SH3_JIP2, Src homology 3 domain of JNK-interacting protein
2. JNK-interacting protein 2 (JIP2) is also called
Mitogen-activated protein kinase 8-interacting protein 2
(MAPK8IP2) or Islet-brain-2 (IB2). It is widely
expressed in the brain, where it forms complexes with
fibroblast growth factor homologous factors (FHFs),
which facilitates activation of the p38delta MAPK. JIP2
is enriched in postsynaptic densities and may play a
role in motor and cognitive function. In addition to a
JNK binding domain, JIP2 also contains SH3 and
Phosphotyrosine-binding (PTB) domains. The SH3 domain of
the related protein JIP1 homodimerizes at the interface
usually involved in proline-rich ligand recognition,
despite the lack of this motif in the domain itself. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 33.0 bits (75), Expect = 0.023
Identities = 18/51 (35%), Positives = 26/51 (50%), Gaps = 4/51 (7%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHG---EIGARKGLFPATY 205
+A++ F P+ ELE D + V D +W+ G G R G+FPA Y
Sbjct: 3 RAVFRFIPRHEDELELDVDDPLLVEAEEDDYWYRGYNMRTGER-GIFPAFY 52
>gnl|CDD|212877 cd11944, SH3_Endophilin_B2, Src homology 3 domain of Endophilin-B2.
Endophilin-B2, also called SH3GLB2 (SH3-domain
GRB2-like endophilin B2), is a cytoplasmic protein that
interacts with the apoptosis inducer Bax. It is
overexpressed in prostate cancer metastasis and has been
identified as a cancer antigen with potential utility in
immunotherapy. Endophilins play roles in synaptic
vesicle formation, virus budding, mitochondrial
morphology maintenance, receptor-mediated endocytosis
inhibition, and endosomal sorting. They contain an
N-terminal N-BAR domain (BAR domain with an additional
N-terminal amphipathic helix), followed by a variable
region containing proline clusters, and a C-terminal SH3
domain. Endophilin-B2 forms homo- and heterodimers (with
endophilin-B1) through its BAR domain. The related
protein endophilin-B1 interacts with amphiphysin 1 and
dynamin 1 through its SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 32.7 bits (74), Expect = 0.026
Identities = 18/51 (35%), Positives = 25/51 (49%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRS--DQHWWHGEIGARKGLFPATYI 206
+ LYD+ + EL ++ITV D W GE G +KG P TY+
Sbjct: 3 RVLYDYEAADSSELALLADELITVYSLPGMDPDWLIGERGNQKGKVPVTYL 53
Score = 27.3 bits (60), Expect = 2.3
Identities = 12/55 (21%), Positives = 28/55 (50%), Gaps = 1/55 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMED-DMNWYRAELDGKEGLIPSNYIEM 55
+A +D+ A EL+ +++ + ++ D +W E ++G +P Y+E+
Sbjct: 1 KARVLYDYEAADSSELALLADELITVYSLPGMDPDWLIGERGNQKGKVPVTYLEL 55
>gnl|CDD|212927 cd11994, SH3_Intersectin2_4, Fourth Src homology 3 domain (or SH3D)
of Intersectin-2. Intersectin-2 (ITSN2) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN2 also functions as a specific GEF for Cdc42
activation in epithelial morphogenesis, and is required
in mitotic spindle orientation. It exists in
alternatively spliced short and long isoforms. The short
isoform contains two Eps15 homology domains (EH1 and
EH2), a coiled-coil region and five SH3 domains
(SH3A-E), while the long isoform, in addition, contains
RhoGEF (also called Dbl-homologous or DH), Pleckstrin
homology (PH) and C2 domains. The fourth SH3 domain (or
SH3D) of ITSN2 is expected to bind protein partners,
similar to ITSN1 which has been shown to bind SHIP2,
Numb, CdGAP, and N-WASP. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 59
Score = 32.6 bits (74), Expect = 0.026
Identities = 15/56 (26%), Positives = 26/56 (46%), Gaps = 5/56 (8%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGAR-----KGLFPATYI 206
+ Q + +L G +I + ++ WW GE+ AR KG FPA+++
Sbjct: 1 IAQVTTAYVASGVEQLSLSPGQLILILKKNSSGWWLGELQARGKKRQKGWFPASHV 56
>gnl|CDD|213005 cd12072, SH3_FNBP1L, Src Homology 3 domain of Formin Binding
Protein 1-Like. FormiN Binding Protein 1-Like
(FNBP1L), also known as Toca-1 (Transducer of
Cdc42-dependent actin assembly), forms a complex with
neural Wiskott-Aldrich syndrome protein (N-WASP). The
FNBP1L/N-WASP complex induces the formation of
filopodia and endocytic vesicles. FNBP1L is required
for Cdc42-induced actin assembly and is essential for
autophagy of intracellular pathogens. It contains an
N-terminal F-BAR domain, a central Cdc42-binding HR1
domain, and a C-terminal SH3 domain. The SH3 domain of
the related protein, CIP4, associates with Gapex-5, a
Rab31 GEF. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 32.3 bits (73), Expect = 0.034
Identities = 17/52 (32%), Positives = 33/52 (63%), Gaps = 1/52 (1%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRA-ELDGKEGLIPSNYIEM 55
A + F+ + E L+ ++ +VL I+ + W RA + +G+EG +P++YIE+
Sbjct: 5 ALYPFDGSNEGTLAMKEGEVLYIIEEDKGDGWTRARKQNGEEGYVPTSYIEI 56
>gnl|CDD|212831 cd11898, SH3_SNX9, Src Homology 3 domain of Sorting nexin 9.
Sorting nexin 9 (SNX9), also known as SH3PX1, is a
cytosolic protein that interacts with proteins
associated with clathrin-coated pits such as
Cdc-42-associated tyrosine kinase 2 (ACK2). It binds
class I polyproline sequences found in dynamin 1/2 and
the WASP/N-WASP actin regulators. SNX9 is localized to
plasma membrane endocytic sites and acts primarily in
clathrin-mediated endocytosis. Its array of interacting
partners suggests that SNX9 functions at the interface
between endocytosis and actin cytoskeletal organization.
SNXs are Phox homology (PX) domain containing proteins
that are involved in regulating membrane traffic and
protein sorting in the endosomal system. SNX9 also
contains BAR and SH3 domains. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 32.5 bits (74), Expect = 0.034
Identities = 19/53 (35%), Positives = 29/53 (54%), Gaps = 5/53 (9%)
Query: 158 QALYDFTPQEPG--ELEFRRGDVITVTDRSDQHWWHGEIGAR--KGLFPATYI 206
+ LYDF EPG EL + G++ITVT+ + W ++ +GL P Y+
Sbjct: 3 RVLYDFA-AEPGNNELTVKEGEIITVTNPNVGGGWIEAKNSQGERGLVPTDYV 54
Score = 31.4 bits (71), Expect = 0.070
Identities = 14/51 (27%), Positives = 30/51 (58%), Gaps = 2/51 (3%)
Query: 7 HDFNATA-EDELSFRKSQVLKILNMEDDMNWYRAE-LDGKEGLIPSNYIEM 55
+DF A +EL+ ++ +++ + N W A+ G+ GL+P++Y+E+
Sbjct: 6 YDFAAEPGNNELTVKEGEIITVTNPNVGGGWIEAKNSQGERGLVPTDYVEI 56
>gnl|CDD|212878 cd11945, SH3_Endophilin_B1, Src homology 3 domain of Endophilin-B1.
Endophilin-B1, also called Bax-interacting factor 1
(Bif-1) or SH3GLB1 (SH3-domain GRB2-like endophilin B1),
is localized mainly to the Golgi apparatus. It is
involved in the regulation of many biological events
including autophagy, tumorigenesis, nerve growth factor
(NGF) trafficking, neurite outgrowth, mitochondrial
outer membrane dynamics, and cell death. Endophilins
play roles in synaptic vesicle formation, virus budding,
mitochondrial morphology maintenance, receptor-mediated
endocytosis inhibition, and endosomal sorting. They
contain an N-terminal N-BAR domain (BAR domain with an
additional N-terminal amphipathic helix), followed by a
variable region containing proline clusters, and a
C-terminal SH3 domain. Endophilin-B1 forms homo- and
heterodimers (with endophilin-B2) through its BAR
domain. It interacts with amphiphysin 1 and dynamin 1
through its SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 61
Score = 32.3 bits (73), Expect = 0.036
Identities = 19/51 (37%), Positives = 24/51 (47%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRS--DQHWWHGEIGARKGLFPATYI 206
+ LYD+ EL +VITV D W GE G +KG P TY+
Sbjct: 7 RVLYDYDAANSTELSLLADEVITVYSVPGMDSDWLMGERGNQKGKVPITYL 57
Score = 30.0 bits (67), Expect = 0.30
Identities = 14/52 (26%), Positives = 28/52 (53%), Gaps = 1/52 (1%)
Query: 7 HDFNATAEDELSFRKSQVLKILNMED-DMNWYRAELDGKEGLIPSNYIEMKN 57
+D++A ELS +V+ + ++ D +W E ++G +P Y+E+ N
Sbjct: 10 YDYDAANSTELSLLADEVITVYSVPGMDSDWLMGERGNQKGKVPITYLELLN 61
>gnl|CDD|212782 cd11848, SH3_SLAP-like, Src homology 3 domain of Src-Like Adaptor
Proteins. SLAPs are adaptor proteins with limited
similarity to Src family tyrosine kinases. They contain
an N-terminal SH3 domain followed by an SH2 domain, and
a unique C-terminal sequence. They function in
regulating the signaling, ubiquitination, and
trafficking of T-cell receptor (TCR) and B-cell
receptor (BCR) components. Vertebrates contain two
SLAPs, named SLAP (or SLA1) and SLAP2 (or SLA2). SLAP
has been shown to interact with the EphA receptor,
EpoR, Lck, PDGFR, Syk, CD79a, among others, while SLAP2
interacts with CSF1R. Both SLAPs interact with c-Cbl,
LAT, CD247, and Zap70. SLAP modulates TCR surface
expression levels as well as surface and total BCR
levels. As an adaptor to c-Cbl, SLAP increases the
ubiquitination, intracellular retention, and targeted
degradation of the BCR complex components. SLAP2 plays
a role in c-Cbl-dependent regulation of CSF1R, a
tyrosine kinase important for myeloid cell growth and
differentiation. The SH3 domain of SLAP forms a complex
with v-Abl. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 32.2 bits (73), Expect = 0.038
Identities = 16/53 (30%), Positives = 30/53 (56%), Gaps = 4/53 (7%)
Query: 3 AIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRA--ELDGKEGLIPSNYI 53
+A D+ + ELS R + L I++ D+ +W++ E+ G+E IPS ++
Sbjct: 2 LVALGDYPSGGPAELSLRLGEPLTIVS--DEGDWWKVLSEVTGRESYIPSVHV 52
Score = 31.4 bits (71), Expect = 0.074
Identities = 17/76 (22%), Positives = 30/76 (39%), Gaps = 29/76 (38%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYRA 218
AL D+ P EL R G+ +T+ + D+ +W++
Sbjct: 4 ALGDYPSGGPAELSLRLGEPLTI---------------------------VSDEGDWWKV 36
Query: 219 --ELDGKEGLIPSNYI 232
E+ G+E IPS ++
Sbjct: 37 LSEVTGRESYIPSVHV 52
>gnl|CDD|212970 cd12037, SH3_MPP2, Src Homology 3 domain of Membrane Protein,
Palmitoylated 2 (or MAGUK p55 subfamily member 2).
MPP2 is a scaffolding protein that interacts with the
non-receptor tyrosine kinase c-Src in epithelial cells
to negatively regulate its activity and morphological
function. It is one of seven vertebrate homologs of the
Drosophila Stardust protein, which is required in
establishing cell polarity, and it contains two L27
domains followed by the core of three domains
characteristic of MAGUK (membrane-associated guanylate
kinase) proteins: PDZ, SH3, and guanylate kinase (GuK).
In addition, it also contains the Hook (Protein 4.1
Binding) motif in between the SH3 and GuK domains. The
GuK domain in MAGUK proteins is enzymatically inactive;
instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 59
Score = 32.2 bits (73), Expect = 0.039
Identities = 17/39 (43%), Positives = 24/39 (61%), Gaps = 3/39 (7%)
Query: 14 EDELSFRKSQVLKILNMEDDMNWYRAEL--DGKEGLIPS 50
E L FR +L+I+N ++D NW++A G GLIPS
Sbjct: 20 EAGLKFRAGDLLQIVN-QEDPNWWQACHVEGGSAGLIPS 57
Score = 31.1 bits (70), Expect = 0.094
Identities = 19/59 (32%), Positives = 31/59 (52%), Gaps = 13/59 (22%)
Query: 156 LVQALYDFTP--------QEPGELEFRRGDVITVTDRSDQHWW---HGEIGARKGLFPA 203
V+ +D+ P +E G L+FR GD++ + ++ D +WW H E G GL P+
Sbjct: 1 FVKCHFDYDPSSDSLIPCKEAG-LKFRAGDLLQIVNQEDPNWWQACHVE-GGSAGLIPS 57
>gnl|CDD|213009 cd12076, SH3_Tks4_2, Second Src homology 3 domain of Tyrosine
kinase substrate with four SH3 domains. Tks4, also
called SH3 and PX domain-containing protein 2B
(SH3PXD2B) or HOFI, is a Src substrate and scaffolding
protein that plays an important role in the formation of
podosomes and invadopodia, the dynamic actin-rich
structures that are related to cell migration and cancer
cell invasion. It is required in the formation of
functional podosomes, EGF-induced membrane ruffling, and
lamellipodia generation. It plays an important role in
cellular attachment and cell spreading. Tks4 is
essential for the localization of MT1-MMP (membrane-type
1 matrix metalloproteinase) to invadopodia. It contains
an N-terminal Phox homology (PX) domain and four SH3
domains. This model characterizes the second SH3 domain
of Tks4. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 31.9 bits (72), Expect = 0.043
Identities = 12/48 (25%), Positives = 26/48 (54%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+Y +T ++ E+ +G V+ V ++ + WW ++G PA+Y+
Sbjct: 5 VIYPYTARDQDEINLEKGAVVEVIQKNLEGWWKIRYQGKEGWAPASYL 52
Score = 28.1 bits (62), Expect = 1.2
Identities = 14/53 (26%), Positives = 30/53 (56%), Gaps = 5/53 (9%)
Query: 4 IAKHDFNATAEDELSFRKSQVLKIL--NMEDDMNWYRAELDGKEGLIPSNYIE 54
+ + A +DE++ K V++++ N+E W++ GKEG P++Y++
Sbjct: 4 TVIYPYTARDQDEINLEKGAVVEVIQKNLE---GWWKIRYQGKEGWAPASYLK 53
>gnl|CDD|212968 cd12035, SH3_MPP1-like, Src Homology 3 domain of Membrane Protein,
Palmitoylated 1 (or MAGUK p55 subfamily member 1)-like
proteins. This subfamily includes MPP1, CASK
(Calcium/calmodulin-dependent Serine protein Kinase),
Caenorhabditis elegans lin-2, and similar proteins. MPP1
and CASK are scaffolding proteins from the MAGUK
(membrane-associated guanylate kinase) protein family,
which is characterized by the presence of a core of
three domains: PDZ, SH3, and guanylate kinase (GuK). In
addition, they also have the Hook (Protein 4.1 Binding)
motif in between the SH3 and GuK domains. The GuK domain
in MAGUK proteins is enzymatically inactive; instead,
the domain mediates protein-protein interactions and
associates intramolecularly with the SH3 domain. CASK
and lin-2 also contain an N-terminal
calmodulin-dependent kinase (CaMK)-like domain and two
L27 domains. MPP1 is ubiquitously-expressed and plays
roles in regulating neutrophil polarity, cell shape,
hair cell development, and neural development and
patterning of the retina. CASK is highly expressed in
the mammalian nervous system and plays roles in synaptic
protein targeting, neural development, and gene
expression regulation. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 62
Score = 32.0 bits (73), Expect = 0.051
Identities = 18/59 (30%), Positives = 30/59 (50%), Gaps = 13/59 (22%)
Query: 157 VQALYDFTP--------QEPGELEFRRGDVITVTDRSDQHWWHGEI-GARK---GLFPA 203
V+A +D+ P Q+ G + F+ GD++ + + D +WW GA K GL P+
Sbjct: 2 VRAQFDYDPSKDDLIPCQQAG-IAFKTGDILQIISKDDHNWWQARKPGASKEPAGLIPS 59
>gnl|CDD|212957 cd12024, SH3_NoxO1_2, Second or C-terminal Src homology 3 domain
of NADPH oxidase (Nox) Organizing protein 1. Nox
Organizing protein 1 (NoxO1) is a critical regulator of
enzyme kinetics of the nonphagocytic NADPH oxidase
Nox1, which catalyzes the transfer of electrons from
NADPH to molecular oxygen to form superoxide. Nox1 is
expressed in colon, stomach, uterus, prostate, and
vascular smooth muscle cells. NoxO1 is involved in
targeting activator subunits (such as NoxA1) to Nox1.
It is co-localized with Nox1 in the membranes of
resting cells and directs the subcellular localization
of Nox1. NoxO1 contains an N-terminal Phox homology
(PX) domain, tandem SH3 domains (N-SH3 and C-SH3), and
a C-terminal proline-rich region (PRR). This model
characterizes the second SH3 domain (or C-SH3) of
NoxO1. The tandem SH3 domains of NoxO1 interact with
the PRR of p22phox, which also complexes with Nox1. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 31.5 bits (72), Expect = 0.061
Identities = 15/45 (33%), Positives = 25/45 (55%), Gaps = 1/45 (2%)
Query: 9 FNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYI 53
+ A EDELS V+++L D+ W+ +G+ G +PS Y+
Sbjct: 8 YEAQKEDELSVPAGVVVEVLQKSDN-GWWLIRYNGRAGYVPSMYL 51
Score = 31.5 bits (72), Expect = 0.062
Identities = 14/44 (31%), Positives = 20/44 (45%)
Query: 163 FTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ Q+ EL G V+ V +SD WW R G P+ Y+
Sbjct: 8 YEAQKEDELSVPAGVVVEVLQKSDNGWWLIRYNGRAGYVPSMYL 51
>gnl|CDD|213010 cd12077, SH3_Tks5_2, Second Src homology 3 domain of Tyrosine
kinase substrate with five SH3 domains. Tks5, also
called SH3 and PX domain-containing protein 2A
(SH3PXD2A) or Five SH (FISH), is a scaffolding protein
and Src substrate that is localized in podosomes, which
are electron-dense structures found in Src-transformed
fibroblasts, osteoclasts, macrophages, and some invasive
cancer cells. It binds and regulates some members of the
ADAMs family of transmembrane metalloproteases, which
function as sheddases and mediators of cell and matrix
interactions. It is required for podosome formation,
degradation of the extracellular matrix, and cancer cell
invasion. Tks5 contains an N-terminal Phox homology (PX)
domain and five SH3 domains. This model characterizes
the second SH3 domain of Tks5. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 31.5 bits (71), Expect = 0.069
Identities = 12/44 (27%), Positives = 24/44 (54%)
Query: 163 FTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+T Q E+ F +G + V ++ + WW+ ++G PA+Y+
Sbjct: 9 YTSQGKDEIGFEKGVTVEVIQKNLEGWWYIRYLGKEGWAPASYL 52
Score = 26.5 bits (58), Expect = 3.7
Identities = 13/48 (27%), Positives = 27/48 (56%), Gaps = 5/48 (10%)
Query: 9 FNATAEDELSFRKSQVLKIL--NMEDDMNWYRAELDGKEGLIPSNYIE 54
+ + +DE+ F K ++++ N+E W+ GKEG P++Y++
Sbjct: 9 YTSQGKDEIGFEKGVTVEVIQKNLE---GWWYIRYLGKEGWAPASYLK 53
>gnl|CDD|213016 cd12140, SH3_Amphiphysin_I, Src Homology 3 domain of Amphiphysin I.
Amphiphysins function primarily in endocytosis and
other membrane remodeling events. They exist in several
isoforms and mammals possess two amphiphysin proteins
from distinct genes. Amphiphysin I proteins, enriched in
the brain and nervous system, contain domains that bind
clathrin, Adaptor Protein complex 2 (AP2), dynamin, and
synaptojanin. They function in synaptic vesicle
endocytosis. Human autoantibodies to amphiphysin I
hinder GABAergic signaling and contribute to the
pathogenesis of paraneoplastic stiff-person syndrome.
Amphiphysins contain an N-terminal BAR domain with an
additional N-terminal amphipathic helix (an N-BAR), a
variable central domain, and a C-terminal SH3 domain.
The SH3 domain of amphiphysins bind proline-rich motifs
present in binding partners such as dynamin,
synaptojanin, and nsP3. It also belongs to a subset of
SH3 domains that bind ubiquitin in a site that overlaps
with the peptide binding site. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 72
Score = 31.8 bits (72), Expect = 0.073
Identities = 20/64 (31%), Positives = 28/64 (43%), Gaps = 15/64 (23%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITV-----TDRSDQHW--------W--HGEIGARKGLF 201
V+ L+DF ELE +RGD++ V D W W + + A KGLF
Sbjct: 5 VETLHDFEAANSDELELKRGDIVLVVPSETAADQDAGWLTGVKESDWLQYRDASAYKGLF 64
Query: 202 PATY 205
P +
Sbjct: 65 PENF 68
>gnl|CDD|213011 cd12078, SH3_Tks4_3, Third Src homology 3 domain of Tyrosine kinase
substrate with four SH3 domains. Tks4, also called SH3
and PX domain-containing protein 2B (SH3PXD2B) or HOFI,
is a Src substrate and scaffolding protein that plays an
important role in the formation of podosomes and
invadopodia, the dynamic actin-rich structures that are
related to cell migration and cancer cell invasion. It
is required in the formation of functional podosomes,
EGF-induced membrane ruffling, and lamellipodia
generation. It plays an important role in cellular
attachment and cell spreading. Tks4 is essential for the
localization of MT1-MMP (membrane-type 1 matrix
metalloproteinase) to invadopodia. It contains an
N-terminal Phox homology (PX) domain and four SH3
domains. This model characterizes the third SH3 domain
of Tks4. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 31.2 bits (70), Expect = 0.093
Identities = 14/45 (31%), Positives = 25/45 (55%)
Query: 162 DFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
DF P + F+ G + V +++ WW+ +I ++G PAT+I
Sbjct: 7 DFQTTIPDGISFQAGLKVEVIEKNLSGWWYIQIEDKEGWAPATFI 51
Score = 27.7 bits (61), Expect = 1.4
Identities = 15/48 (31%), Positives = 29/48 (60%), Gaps = 3/48 (6%)
Query: 8 DFNATAEDELSFRKSQVLKILNMEDDMN-WYRAELDGKEGLIPSNYIE 54
DF T D +SF+ LK+ +E +++ W+ +++ KEG P+ +I+
Sbjct: 7 DFQTTIPDGISFQAG--LKVEVIEKNLSGWWYIQIEDKEGWAPATFID 52
>gnl|CDD|212794 cd11860, SH3_DLG5, Src homology 3 domain of Disks Large homolog 5.
DLG5 is a multifunctional scaffold protein that is
located at sites of cell-cell contact and is involved in
the maintenance of cell shape and polarity. Mutations in
the DLG5 gene are associated with Crohn's disease (CD)
and inflammatory bowel disease (IBD). DLG5 is a member
of the MAGUK (membrane-associated guanylate kinase)
protein family, which is characterized by the presence
of a core of three domains: PDZ, SH3, and guanylate
kinase (GuK). The GuK domain in MAGUK proteins is
enzymatically inactive; instead, the domain mediates
protein-protein interactions and associates
intramolecularly with the SH3 domain. DLG5 contains 4
PDZ domains as well as an N-terminal domain of unknown
function. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 63
Score = 31.2 bits (71), Expect = 0.098
Identities = 9/27 (33%), Positives = 18/27 (66%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTD 183
V+AL+D + + EL F++ D++ V +
Sbjct: 2 VRALFDRSAENEDELSFKKDDILYVDN 28
Score = 26.1 bits (58), Expect = 7.2
Identities = 8/20 (40%), Positives = 14/20 (70%)
Query: 336 VQALYDFTPQEPGELEFRRD 355
V+AL+D + + EL F++D
Sbjct: 2 VRALFDRSAENEDELSFKKD 21
Score = 25.8 bits (57), Expect = 7.8
Identities = 20/60 (33%), Positives = 28/60 (46%), Gaps = 14/60 (23%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMEDDM------NWYRAELD-----GKEGLIPSNYI 53
A D +A EDELSF+K +L + ++ M W +D K G+IPS Y
Sbjct: 4 ALFDRSAENEDELSFKKDDILYV---DNTMFNGVFGQWRAWLVDEEGRKRKCGIIPSKYK 60
>gnl|CDD|212996 cd12063, SH3_Caskin2, Src Homology 3 domain of CASK interacting
protein 2. Caskin2 is a multidomain adaptor protein
that contains six ankyrin repeats, a single SH3 domain,
tandem sterile alpha motif (SAM) domains, and a long
disordered proline-rich region. It shares a domain
architecture with Caskin1, but does not bind CASK. The
function of Caskin2 is still unknown. SH3 domains bind
to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs; they play a
role in the regulation of enzymes by intramolecular
interactions, changing the subcellular localization of
signal pathway components and mediate multiprotein
complex assemblies.
Length = 62
Score = 31.1 bits (70), Expect = 0.100
Identities = 21/57 (36%), Positives = 27/57 (47%), Gaps = 7/57 (12%)
Query: 157 VQALYDF-TPQEPGELEFRRGDVITVTDRSDQHWWHGEI------GARKGLFPATYI 206
V+AL DF +P L R GDVITV ++ W G I R G FP + +
Sbjct: 3 VRALKDFWNLHDPTALNVRAGDVITVLEQHPDGRWKGHIHDSQRGTDRVGYFPPSIV 59
>gnl|CDD|213015 cd12139, SH3_Bin1, Src Homology 3 domain of Bridging integrator 1
(Bin1), also called Amphiphysin-2. Bin1 isoforms are
localized in many different tissues and may function in
intracellular vesicle trafficking. It plays a role in
the organization and maintenance of the T-tubule network
in skeletal muscle. Mutations in Bin1 are associated
with autosomal recessive centronuclear myopathy. Bin1
contains an N-terminal BAR domain with an additional
N-terminal amphipathic helix (an N-BAR) and a C-terminal
SH3 domain. The SH3 domain of Bin1 forms transient
complexes with actin, myosin filaments, and CDK5, to
facilitate sarcomere organization and myofiber
maturation. It also binds dynamin and prevents its
self-assembly. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 72
Score = 31.4 bits (71), Expect = 0.10
Identities = 18/64 (28%), Positives = 31/64 (48%), Gaps = 15/64 (23%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVT-----DRSDQHW--------W--HGEIGARKGLF 201
VQA +D+T + EL+ + GDV+ V + D+ W W H ++ +G+F
Sbjct: 5 VQAQHDYTATDTDELQLKAGDVVLVIPFQNPEEQDEGWLMGVKESDWNQHKKLEKCRGVF 64
Query: 202 PATY 205
P +
Sbjct: 65 PENF 68
Score = 26.4 bits (58), Expect = 6.8
Identities = 16/64 (25%), Positives = 28/64 (43%), Gaps = 14/64 (21%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMED----DMNWY----------RAELDGKEGLIPS 50
A+HD+ AT DEL + V+ ++ ++ D W +L+ G+ P
Sbjct: 7 AQHDYTATDTDELQLKAGDVVLVIPFQNPEEQDEGWLMGVKESDWNQHKKLEKCRGVFPE 66
Query: 51 NYIE 54
N+ E
Sbjct: 67 NFTE 70
>gnl|CDD|212949 cd12016, SH3_Tks_2, Second Src homology 3 domain of Tyrosine
kinase substrate (Tks) proteins. Tks proteins are Src
substrates and scaffolding proteins that play important
roles in the formation of podosomes and invadopodia,
the dynamic actin-rich structures that are related to
cell migration and cancer cell invasion. Vertebrates
contain two Tks proteins, Tks4 (Tyr kinase substrate
with four SH3 domains) and Tks5 (Tyr kinase substrate
with five SH3 domains), which display partially
overlapping but non-redundant functions. Both associate
with the ADAMs family of transmembrane
metalloproteases, which function as sheddases and
mediators of cell and matrix interactions. Tks5
interacts with N-WASP and Nck, while Tks4 is essential
for the localization of MT1-MMP (membrane-type 1 matrix
metalloproteinase) to invadopodia. Tks proteins contain
an N-terminal Phox homology (PX) domain and four or
five SH3 domains. This model characterizes the second
SH3 domain of Tks proteins. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 54
Score = 30.9 bits (70), Expect = 0.12
Identities = 14/46 (30%), Positives = 25/46 (54%), Gaps = 1/46 (2%)
Query: 9 FNATAEDELSFRKSQVLKILNMEDDMNWYRAELDGKEGLIPSNYIE 54
+ A EDE+ F V++++ D W++ GKEG P+ Y++
Sbjct: 9 YKAENEDEIGFETGVVVEVIQKNLD-GWWKIRYQGKEGWAPATYLK 53
Score = 29.3 bits (66), Expect = 0.37
Identities = 12/46 (26%), Positives = 21/46 (45%)
Query: 161 YDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+ + E+ F G V+ V ++ WW ++G PATY+
Sbjct: 7 QAYKAENEDEIGFETGVVVEVIQKNLDGWWKIRYQGKEGWAPATYL 52
>gnl|CDD|198248 cd10385, SH2_SOCS4, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first
recognized as a group of cytokine-inducible SH2 (CIS)
domain proteins comprising eight family members in
human (CIS and SOCS1-SOCS7). In addition to the SH2
domain, SOCS proteins have a variable N-terminal domain
and a conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation.
Loss of SOCS activity results in excessive cytokine
signaling associated with a variety of hematopoietic,
autoimmune, and inflammatory diseases and certain
cancers. Members (SOCS4-SOCS7) were identified by their
conserved SOCS box, an adapter motif of 3 helices that
associates substrate binding domains, such as the SOCS
SH2 domain, ankryin, and WD40 with ubiquitin ligase
components. These show limited cytokine induction. In
general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 101
Score = 32.0 bits (72), Expect = 0.12
Identities = 17/49 (34%), Positives = 28/49 (57%)
Query: 51 NYIEMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVK 99
+ +++ N+ Y+G + + AE LL K EG FL+R S FS+S +
Sbjct: 3 DLLQINNNPCYWGVMDKYAAEALLEGKPEGTFLLRDSAQEDYLFSVSFR 51
Score = 32.0 bits (72), Expect = 0.12
Identities = 17/49 (34%), Positives = 28/49 (57%)
Query: 230 NYIEMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVK 278
+ +++ N+ Y+G + + AE LL K EG FL+R S FS+S +
Sbjct: 3 DLLQINNNPCYWGVMDKYAAEALLEGKPEGTFLLRDSAQEDYLFSVSFR 51
>gnl|CDD|212915 cd11982, SH3_Shank1, Src homology 3 domain of SH3 and multiple
ankyrin repeat domains protein 1. Shank1, also called
SSTRIP (Somatostatin receptor-interacting protein), is a
brain-specific protein that plays a role in the
construction of postsynaptic density (PSD) and the
maturation of dendritic spines. Mice deficient in Shank1
show altered PSD composition, thinner PSDs, smaller
dendritic spines, and weaker basal synaptic
transmission, although synaptic plasticity is normal.
They show increased anxiety and impaired fear memory,
but also show better spatial learning. Shank proteins
carry scaffolding functions through multiple sites of
protein-protein interaction in its domain architecture,
including ankyrin (ANK) repeats, a long proline rich
region, as well as SH3, PDZ, and SAM domains. The SH3
domain of Shank binds GRIP, a scaffold protein that
binds AMPA receptors and Eph receptors/ligands. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 30.8 bits (69), Expect = 0.13
Identities = 13/45 (28%), Positives = 23/45 (51%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPA 203
A+ + Q GE+ +G+ I V + +W G++ R G FP+
Sbjct: 5 AVKPYQSQAEGEISLSKGEKIKVLSVGEGGFWEGQVKGRVGWFPS 49
>gnl|CDD|212710 cd11776, SH3_PI3K_p85, Src Homology 3 domain of the p85 regulatory
subunit of Class IA Phosphatidylinositol 3-kinases.
Class I PI3Ks convert PtdIns(4,5)P2 to the critical
second messenger PtdIns(3,4,5)P3. They are heterodimers
and exist in multiple isoforms consisting of one
catalytic subunit (out of four isoforms) and one of
several regulatory subunits. Class IA PI3Ks associate
with the p85 regulatory subunit family, which contains
SH3, RhoGAP, and SH2 domains. The p85 subunits recruit
the PI3K p110 catalytic subunit to the membrane, where
p110 phosphorylates inositol lipids. Vertebrates harbor
two p85 isoforms, called alpha and beta. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 72
Score = 30.9 bits (70), Expect = 0.16
Identities = 13/66 (19%), Positives = 24/66 (36%), Gaps = 17/66 (25%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGAR-----------------KGL 200
+ALYD+ + ++ + GDV+ V + + +G
Sbjct: 4 RALYDYEKERDEDIILKTGDVLVVENPELLALGVPDGKETVPKPEGWLEGKNERTGERGD 63
Query: 201 FPATYI 206
FP TY+
Sbjct: 64 FPGTYV 69
>gnl|CDD|212916 cd11983, SH3_Shank2, Src homology 3 domain of SH3 and multiple
ankyrin repeat domains protein 2. Shank2, also called
ProSAP1 (Proline-rich synapse-associated protein 1) or
CortBP1 (Cortactin-binding protein 1), is found in
neurons, glia, endocrine cells, liver, and kidney. It
plays a role in regulating dendritic spine volume and
branching and postsynaptic clustering. Mutations in the
Shank2 gene are associated with autism spectrum disorder
and mental retardation. Shank proteins carry scaffolding
functions through multiple sites of protein-protein
interaction in its domain architecture, including
ankyrin (ANK) repeats, a long proline rich region, as
well as SH3, PDZ, and SAM domains. The SH3 domain of
Shank binds GRIP, a scaffold protein that binds AMPA
receptors and Eph receptors/ligands. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 52
Score = 30.3 bits (68), Expect = 0.17
Identities = 13/41 (31%), Positives = 19/41 (46%)
Query: 163 FTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPA 203
+ PQ GE+ +GD + V + +W G G FPA
Sbjct: 9 YQPQVEGEIPLHKGDRVKVLSIGEGGFWEGSARGHVGWFPA 49
>gnl|CDD|212847 cd11914, SH3_BAIAP2L2, Src Homology 3 domain of Brain-specific
Angiogenesis Inhibitor 1-Associated Protein 2-Like 2.
BAIAP2L2 co-localizes with clathrin plaques but its
function has not been determined. It contains an
N-terminal IMD or Inverse-Bin/Amphiphysin/Rvs (I-BAR)
domain, an SH3 domain, and a WASP homology 2 (WH2)
actin-binding motif at the C-terminus. The related
proteins, BAIAP2L1 and IRSp53, function as regulators of
membrane dynamics and the actin cytoskeleton. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 30.6 bits (69), Expect = 0.18
Identities = 19/54 (35%), Positives = 28/54 (51%), Gaps = 4/54 (7%)
Query: 157 VQALYDF-TPQEPGELEFRRGDVITVTDRSDQH-WWHG--EIGARKGLFPATYI 206
V+A+ P L F RGD+ITV ++ W +G E +R+G FP Y+
Sbjct: 3 VRAIVSHPAGSNPTLLRFNRGDIITVLVPEARNGWLYGKLEGSSRQGWFPEAYV 56
>gnl|CDD|212823 cd11890, MIA, Melanoma Inhibitory Activity protein. MIA is a
single domain protein that adopts a Src Homology 3 (SH3)
domain-like fold; it contains an additional antiparallel
beta sheet and two disulfide bonds compared to classical
SH3 domains. MIA is secreted from malignant melanoma
cells and it plays an important role in melanoma
development and invasion. MIA is expressed by
chondrocytes in normal tissues and may be important in
the cartilage cell phenotype. Unlike classical SH3
domains, MIA does not bind proline-rich ligands. It
binds peptide ligands with sequence similarity to type
III human fibronectin repeats.
Length = 98
Score = 31.0 bits (70), Expect = 0.21
Identities = 18/70 (25%), Positives = 30/70 (42%), Gaps = 16/70 (22%)
Query: 153 EEC-----LVQALYDFTPQEPGELEFRRGDVITV----TDRSDQHW-------WHGEIGA 196
+EC + AL D+ + + +RG V+ V R W ++GE A
Sbjct: 7 QECSHPISIAVALQDYMAPDCRFIPIQRGQVVYVFSKLKGRGRLFWGGSVQGDYYGEQAA 66
Query: 197 RKGLFPATYI 206
R G FP++ +
Sbjct: 67 RLGYFPSSIV 76
>gnl|CDD|213000 cd12067, SH3_MYO15A, Src Homology 3 domain of Myosin XVa. Myosin
XVa is an unconventional myosin that is critical for the
normal growth of mechanosensory stereocilia of inner ear
hair cells. Mutations in the myosin XVa gene are
associated with nonsyndromic hearing loss. Myosin XVa
contains a unique N-terminal extension followed by a
motor domain, light chain-binding IQ motifs, and a tail
consisting of a pair of MyTH4-FERM tandems separated by
a SH3 domain, and a PDZ domain. SH3 domains bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs; they play a
role in the regulation of enzymes by intramolecular
interactions, changing the subcellular localization of
signal pathway components and mediate multiprotein
complex assemblies.
Length = 80
Score = 30.5 bits (69), Expect = 0.23
Identities = 18/77 (23%), Positives = 28/77 (36%), Gaps = 27/77 (35%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITV---------------------------TDRSDQHW 189
V A+ ++ P++P L F +GD+I + D W
Sbjct: 2 VVAVRNYLPEDPALLSFHKGDIIHLQPLEGPKVGQYYGCVVRKKVMYLEELKRGTPDFGW 61
Query: 190 WHGEIGARKGLFPATYI 206
G I R G+FPA +
Sbjct: 62 KFGAIHGRSGVFPAELV 78
>gnl|CDD|212793 cd11859, SH3_ZO, Src homology 3 domain of the Tight junction
proteins, Zonula occludens (ZO) proteins. ZO proteins
are scaffolding proteins that associate with each other
and with other proteins of the tight junction, zonula
adherens, and gap junctions. They play roles in
regulating cytoskeletal dynamics at these cell
junctions. They are considered members of the MAGUK
(membrane-associated guanylate kinase) protein family,
which is characterized by the presence of a core of
three domains: PDZ, SH3, and guanylate kinase (GuK). The
GuK domain in MAGUK proteins is enzymatically inactive;
instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. Vertebrates contain three ZO proteins (ZO-1,
ZO-2, and ZO-3) with redundant and non-redundant roles.
They contain three PDZ domains, followed by SH3 and GuK
domains; in addition, ZO-1 and ZO-2 contains a
proline-rich (PR) actin binding domain at the C-terminus
while ZO-3 contains this PR domain between the second
and third PDZ domains. The C-terminal regions of the
three ZO proteins are unique. The SH3 domain of ZO-1 has
been shown to bind ZONAB, ZAK, afadin, and Galpha12. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 62
Score = 30.0 bits (68), Expect = 0.29
Identities = 9/23 (39%), Positives = 14/23 (60%)
Query: 161 YDFTPQEPGELEFRRGDVITVTD 183
+D+ GEL F++G+V V D
Sbjct: 6 FDYEKPAKGELSFKKGEVFHVVD 28
>gnl|CDD|213008 cd12075, SH3_Tks4_1, First Src homology 3 domain of Tyrosine kinase
substrate with four SH3 domains. Tks4, also called SH3
and PX domain-containing protein 2B (SH3PXD2B) or HOFI,
is a Src substrate and scaffolding protein that plays an
important role in the formation of podosomes and
invadopodia, the dynamic actin-rich structures that are
related to cell migration and cancer cell invasion. It
is required in the formation of functional podosomes,
EGF-induced membrane ruffling, and lamellipodia
generation. It plays an important role in cellular
attachment and cell spreading. Tks4 is essential for the
localization of MT1-MMP (membrane-type 1 matrix
metalloproteinase) to invadopodia. It contains an
N-terminal Phox homology (PX) domain and four SH3
domains. This model characterizes the first SH3 domain
of Tks4. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 29.7 bits (66), Expect = 0.32
Identities = 11/46 (23%), Positives = 22/46 (47%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPAT 204
+ ++ QE E+ G V+ + ++++ WW +G PAT
Sbjct: 5 VVANYQKQESSEISLYVGQVVDIIEKNESGWWFVSTADEQGWVPAT 50
>gnl|CDD|212711 cd11777, SH3_CIP4_Bzz1_like, Src Homology 3 domain of
Cdc42-Interacting Protein 4, Bzz1 and similar domains.
This subfamily is composed of Cdc42-Interacting Protein
4 (CIP4) and similar proteins such as Formin Binding
Protein 17 (FBP17) and FormiN Binding Protein 1-Like
(FNBP1L), as well as yeast Bzz1 (or Bzz1p). CIP4 and
FNBP1L are Cdc42 effectors that bind Wiskott-Aldrich
syndrome protein (WASP) and function in endocytosis.
CIP4 and FBP17 bind to the Fas ligand and may be
implicated in the inflammatory response. CIP4 may also
play a role in phagocytosis. Bzz1 is also a
WASP/Las17-interacting protein involved in endocytosis
and trafficking to the vacuole. It physically interacts
with type I myosins and functions in the early steps of
endocytosis. Members of this subfamily contain an
N-terminal F-BAR (FES-CIP4 Homology and
Bin/Amphiphysin/Rvs) domain as well as at least one
C-terminal SH3 domain. Bzz1 contains a second SH3
domain at the C-terminus. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 55
Score = 29.5 bits (66), Expect = 0.35
Identities = 15/53 (28%), Positives = 28/53 (52%), Gaps = 1/53 (1%)
Query: 2 EAIAKHDFNATAEDELSFRKSQVLKILNMEDDMNWYRAELD-GKEGLIPSNYI 53
E A + F ++E +S + + L ++ + W R D G+EG +P++YI
Sbjct: 1 ECKALYAFVGSSEGTISMTEGEKLSLVEEDKGDGWTRVRRDTGEEGYVPTSYI 53
>gnl|CDD|212821 cd11888, SH3_ARHGAP9_like, Src Homology 3 domain of Rho
GTPase-activating protein 9 and similar proteins. This
subfamily is composed of Rho GTPase-activating proteins
including mammalian ARHGAP9, and vertebrate ARHGAPs 12
and 27. RhoGAPs (or ARHGAPs) bind to Rho proteins and
enhance the hydrolysis rates of bound GTP. ARHGAP9
functions as a GAP for Rac and Cdc42, but not for RhoA.
It negatively regulates cell migration and adhesion. It
also acts as a docking protein for the MAP kinases Erk2
and p38alpha, and may facilitate cross-talk between the
Rho GTPase and MAPK pathways to control actin
remodeling. ARHGAP27, also called CAMGAP1, shows GAP
activity towards Rac1 and Cdc42. It binds the adaptor
protein CIN85 and may play a role in clathrin-mediated
endocytosis. ARHGAP12 has been shown to display GAP
activity towards Rac1. It plays a role in regulating
HFG-driven cell growth and invasiveness. ARHGAPs in this
subfamily contain SH3, WW, Pleckstin homology (PH), and
RhoGAP domains. SH3 domains bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs; they play a role in the regulation of
enzymes by intramolecular interactions, changing the
subcellular localization of signal pathway components
and mediate multiprotein complex assemblies.
Length = 54
Score = 29.3 bits (66), Expect = 0.36
Identities = 14/53 (26%), Positives = 24/53 (45%), Gaps = 4/53 (7%)
Query: 157 VQALYDF--TPQEPGELEFRRGDVITVTDRSDQHWWH-GEIGARKGLF-PATY 205
V LY F T ++ ++ + G+ + +S+ WW G K + PA Y
Sbjct: 2 VVVLYPFEYTGKDGRKVSIKEGERFLLLKKSNDDWWQVRRPGDSKPFYVPAQY 54
>gnl|CDD|212869 cd11936, SH3_UBASH3B, Src homology 3 domain of Ubiquitin-associated
and SH3 domain-containing protein B. UBASH3B, also
called Suppressor of T cell receptor Signaling (STS)-1
or T cell Ubiquitin LigAnd (TULA)-2 is an active
phosphatase that is expressed ubiquitously. The
phosphatase activity of UBASH3B is essential for its
roles in the suppression of TCR signaling and the
regulation of EGFR. It also interacts with Syk and
functions as a negative regulator of platelet
glycoprotein VI signaling. TULA proteins contain an
N-terminal UBA domain, a central SH3 domain, and a
C-terminal histidine phosphatase domain. They bind c-Cbl
through the SH3 domain and to ubiquitin via UBA. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 62
Score = 29.6 bits (66), Expect = 0.39
Identities = 18/56 (32%), Positives = 26/56 (46%), Gaps = 6/56 (10%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVT----DRSDQHWWHGEIGAR--KGLFPATYI 206
+Q +Y +TPQ ELE GD I ++ + + W +G GL P YI
Sbjct: 4 LQVIYPYTPQNDDELELVPGDYIFMSPMEQTSTSEGWIYGTSLTTGCSGLLPENYI 59
>gnl|CDD|212900 cd11967, SH3_SASH1, Src homology 3 domain of SAM And SH3 Domain
Containing Protein 1. SASH1 is a potential tumor
suppressor in breast and colon cancer. Its decreased
expression is associated with aggressive tumor growth,
metastasis, and poor prognosis. It is widely expressed
in normal tissues (except lymphocytes and dendritic
cells) and is localized in the nucleus and the
cytoplasm. SASH1 interacts with the oncoprotein
cortactin and is important in cell migration and
adhesion. It is a member of the SLY family of proteins,
which are adaptor proteins containing a central
conserved region with a bipartite nuclear localization
signal (NLS) as well as SAM (sterile alpha motif) and
SH3 domains. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 29.2 bits (65), Expect = 0.40
Identities = 13/47 (27%), Positives = 23/47 (48%), Gaps = 2/47 (4%)
Query: 162 DFTPQ--EPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
DFTP + L+ ++GD+I + + W G + + G F Y+
Sbjct: 8 DFTPSPYDTDSLKLKKGDIIDIISKPPMGTWMGLLNNKVGTFKFIYV 54
>gnl|CDD|212920 cd11987, SH3_Intersectin1_1, First Src homology 3 domain (or
SH3A) of Intersectin-1. Intersectin-1 (ITSN1) is an
adaptor protein that functions in exo- and endocytosis,
actin cytoskeletal reorganization, and signal
transduction. It plays a role in clathrin-coated pit
(CCP) formation. It binds to many proteins through its
multidomain structure and facilitate the assembly of
multimeric complexes. ITSN1 localizes in membranous
organelles, CCPs, the Golgi complex, and may be
involved in the cell membrane trafficking system. It
exists in alternatively spliced short and long
isoforms. The short isoform contains two Eps15 homology
domains (EH1 and EH2), a coiled-coil region and five
SH3 domains (SH3A-E), while the long isoform, in
addition, contains RhoGEF (also called Dbl-homologous
or DH), Pleckstrin homology (PH) and C2 domains. The
first SH3 domain (or SH3A) of ITSN1 has been shown to
bind many proteins including Sos1, dynamin1/2, CIN85,
c-Cbl, PI3K-C2, SHIP2, N-WASP, and CdGAP, among others.
SH3 domains are protein interaction domains that bind
to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 29.2 bits (65), Expect = 0.43
Identities = 15/51 (29%), Positives = 26/51 (50%), Gaps = 1/51 (1%)
Query: 5 AKHDFNATAEDELSFRKSQVLKILNMED-DMNWYRAELDGKEGLIPSNYIE 54
A + F A + DE++ + ++ + + + W EL GK G P+NY E
Sbjct: 4 ALYPFEARSHDEITIQPGDIVMVDESQTGEPGWLGGELKGKTGWFPANYAE 54
Score = 28.0 bits (62), Expect = 1.2
Identities = 21/76 (27%), Positives = 29/76 (38%), Gaps = 24/76 (31%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYR 217
+ALY F + E+ + GD++ V + GE G W
Sbjct: 3 RALYPFEARSHDEITIQPGDIVMVDESQT-----GEPG-------------------WLG 38
Query: 218 AELDGKEGLIPSNYIE 233
EL GK G P+NY E
Sbjct: 39 GELKGKTGWFPANYAE 54
>gnl|CDD|212912 cd11979, SH3_VAV1_1, First Src homology 3 domain of VAV1 protein.
VAV1 is expressed predominantly in the hematopoietic
system and it plays an important role in the development
and activation of B and T cells. It is activated by
tyrosine phosphorylation to function as a guanine
nucleotide exchange factor (GEF) for Rho GTPases
following cell surface receptor activation, triggering
various effects such as cytoskeletal reorganization,
transcription regulation, cell cycle progression, and
calcium mobilization. It also serves as a scaffold
protein and has been shown to interact with Ku70, Socs1,
Janus kinase 2, SIAH2, S100B, Abl gene, ZAP-70, SLP76,
and Syk, among others. VAV proteins contain several
domains that enable their function: N-terminal calponin
homology (CH), acidic, RhoGEF (also called
Dbl-homologous or DH), Pleckstrin Homology (PH), C1
(zinc finger), SH2, and two SH3 domains. The first SH3
domain of Vav1 has been shown to bind the adaptor
protein Grb2. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 63
Score = 29.2 bits (65), Expect = 0.55
Identities = 14/49 (28%), Positives = 22/49 (44%), Gaps = 7/49 (14%)
Query: 165 PQEPGE----LEFRRGDVITVTD-RSDQHWWHGEIGARK--GLFPATYI 206
P PG L GD++ +T ++Q+WW G + G FP +
Sbjct: 12 PPPPGAFGPFLRLNPGDIVELTKAEAEQNWWEGRNTSTNEIGWFPCNRV 60
>gnl|CDD|212748 cd11814, SH3_Eve1_1, First Src homology 3 domain of ADAM-binding
protein Eve-1. Eve-1, also called SH3 domain-containing
protein 19 (SH3D19) or EEN-binding protein (EBP), exists
in multiple alternatively spliced isoforms. The longest
isoform contains five SH3 domain in the C-terminal
region and seven proline-rich motifs in the N-terminal
region. It is abundantly expressed in skeletal muscle
and heart, and may be involved in regulating the
activity of ADAMs (A disintegrin and metalloproteases).
Eve-1 interacts with EEN, an endophilin involved in
endocytosis and may be the target of the MLL-EEN fusion
protein that is implicated in leukemogenesis. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 50
Score = 28.7 bits (64), Expect = 0.57
Identities = 13/41 (31%), Positives = 21/41 (51%)
Query: 162 DFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFP 202
D + PGEL +RGDV+ + + D ++ + G G P
Sbjct: 7 DCVSRNPGELSCKRGDVLVMLQQKDNNYLECQKGGETGKVP 47
>gnl|CDD|198249 cd10386, SH2_SOCS5, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) family. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 81
Score = 29.7 bits (66), Expect = 0.57
Identities = 18/49 (36%), Positives = 27/49 (55%)
Query: 61 YYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKV 109
Y+G + R +AE LL K EG FL+R S FS+S + + H ++
Sbjct: 3 YWGVMDRYEAEALLEGKPEGTFLLRDSAQEDYLFSVSFRRYNRSLHARI 51
Score = 29.7 bits (66), Expect = 0.57
Identities = 18/49 (36%), Positives = 27/49 (55%)
Query: 240 YYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDGVQHFKV 288
Y+G + R +AE LL K EG FL+R S FS+S + + H ++
Sbjct: 3 YWGVMDRYEAEALLEGKPEGTFLLRDSAQEDYLFSVSFRRYNRSLHARI 51
>gnl|CDD|212953 cd12020, SH3_Tks5_5, Fifth (C-terminal) Src homology 3 domain of
Tyrosine kinase substrate with five SH3 domains. Tks5,
also called SH3 and PX domain-containing protein 2A
(SH3PXD2A) or Five SH (FISH), is a scaffolding protein
and Src substrate that is localized in podosomes, which
are electron-dense structures found in Src-transformed
fibroblasts, osteoclasts, macrophages, and some
invasive cancer cells. It binds and regulates some
members of the ADAMs family of transmembrane
metalloproteases, which function as sheddases and
mediators of cell and matrix interactions. It is
required for podosome formation, degradation of the
extracellular matrix, and cancer cell invasion. Tks5
contains an N-terminal Phox homology (PX) domain and
five SH3 domains. This model characterizes the fifth
(C-terminal) SH3 domain of Tks5. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 57
Score = 28.8 bits (64), Expect = 0.60
Identities = 15/46 (32%), Positives = 25/46 (54%), Gaps = 3/46 (6%)
Query: 14 EDELSFRKSQVLKILNMEDDMNWYRAELDG---KEGLIPSNYIEMK 56
E+ F++ +++L + WY LDG +G +PSNY+E K
Sbjct: 12 EETAGFQEGVSMEVLEKNPNGWWYCQILDGVKPFKGWVPSNYLEKK 57
>gnl|CDD|212825 cd11892, SH3_MIA2, Src Homology 3 domain of Melanoma Inhibitory
Activity 2 protein. MIA2 is expressed specifically in
hepatocytes and its expression is controlled by
hepatocyte nuclear factor 1 binding sites in the MIA2
promoter. It inhibits the growth and invasion of
hepatocellular carcinomas (HCC) and may act as a tumor
suppressor. A mutation in MIA2 in mice resulted in
reduced cholesterol and triglycerides. Since MIA2
localizes to ER exit sites, it may function as an
ER-to-Golgi trafficking protein that regulates lipid
metabolism. MIA2 contains an N-terminal SH3-like domain,
similar to MIA. It is a member of the recently
identified family that also includes MIA, MIAL, and MIA3
(also called TANGO). MIA is a single domain protein that
adopts a SH3 domain-like fold; it contains an additional
antiparallel beta sheet and two disulfide bonds compared
to classical SH3 domains. Unlike classical SH3 domains,
MIA does not bind proline-rich ligands.
Length = 73
Score = 29.4 bits (66), Expect = 0.63
Identities = 16/49 (32%), Positives = 22/49 (44%), Gaps = 3/49 (6%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITV---TDRSDQHWWHGEIGARKGLFP 202
VQA+ D+ + L F++GD I V + W G G G FP
Sbjct: 14 VQAIRDYRGPDCRYLSFKKGDEIIVYYKLSGKREDLWAGSTGKEFGYFP 62
>gnl|CDD|212694 cd11760, SH3_MIA_like, Src Homology 3 domain of Melanoma Inhibitory
Activity protein and similar proteins. MIA is a single
domain protein that adopts a SH3 domain-like fold; it
contains an additional antiparallel beta sheet and two
disulfide bonds compared to classical SH3 domains. MIA
is secreted from malignant melanoma cells and it plays
an important role in melanoma development and invasion.
MIA is expressed by chondrocytes in normal tissues and
may be important in the cartilage cell phenotype. Unlike
classical SH3 domains, MIA does not bind proline-rich
ligands. MIA is a member of the recently identified
family that also includes MIA-like (MIAL), MIA2, and
MIA3 (also called TANGO); the biological functions of
this family are not yet fully understood.
Length = 76
Score = 29.4 bits (66), Expect = 0.69
Identities = 17/65 (26%), Positives = 25/65 (38%), Gaps = 11/65 (16%)
Query: 153 EEC-----LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHW---WHGEIG---ARKGLF 201
EC +AL D+ + L F++GD I V + W G +G G F
Sbjct: 5 AECSNPISRARALEDYHGPDCRFLNFKKGDTIYVYSKLAGERQDLWAGSVGGDAGLFGYF 64
Query: 202 PATYI 206
P +
Sbjct: 65 PKNLV 69
>gnl|CDD|198235 cd10372, SH2_STAT1, Src homology 2 (SH2) domain found in signal
transducer and activator of transcription (STAT) 1
proteins. STAT1 is a member of the STAT family of
transcription factors. STAT1 is involved in
upregulating genes due to a signal by interferons.
STAT1 forms homodimers or heterodimers with STAT3 that
bind to the Interferon-Gamma Activated Sequence (GAS)
promoter element in response to IFN-gamma stimulation.
STAT1 forms a heterodimer with STAT2 that can bind
Interferon Stimulated Response Element (ISRE) promoter
element in response to either IFN-alpha or IFN-beta
stimulation. Binding in both cases leads to an
increased expression of ISG (Interferon Stimulated
Genes). STAT1 has been shown to interact with protein
kinase R, Src, IRF1, STAT3, MCM5, STAT2, CD117, Fanconi
anemia, complementation group C, CREB-binding protein,
Interleukin 27 receptor, alpha subunit, PIAS1, BRCA1,
Epidermal growth factor receptor, PTK2, Mammalian
target of rapamycin, IFNAR2, PRKCD, TRADD, C-jun,
Calcitriol receptor, ISGF3G, and GNB2L1. STAT proteins
mediate the signaling of cytokines and a number of
growth factors from the receptors of these
extracellular signaling molecules to the cell nucleus.
STATs are specifically phosphorylated by
receptor-associated Janus kinases, receptor tyrosine
kinases, or cytoplasmic tyrosine kinases. The
phosphorylated STAT molecules dimerize by reciprocal
binding of their SH2 domains to the phosphotyrosine
residues. These dimeric STATs translocate into the
nucleus, bind to specific DNA sequences, and regulate
the transcription of their target genes. However there
are a number of unphosphorylated STATs that travel
between the cytoplasm and nucleus and some STATs that
exist as dimers in unstimulated cells that can exert
biological functions independent of being activated.
There are seven mammalian STAT family members which
have been identified: STAT1, STAT2, STAT3, STAT4, STAT5
(STAT5A and STAT5B), and STAT6. There are 6 conserved
domains in STAT: N-terminal domain (NTD), coiled-coil
domain (CCD), DNA-binding domain (DBD), alpha-helical
linker domain (LD), SH2 domain, and transactivation
domain (TAD). NTD is involved in dimerization of
unphosphorylated STATs monomers and for the
tetramerization between STAT1, STAT3, STAT4 and STAT5
on promoters with two or more tandem STAT binding
sites. It also plays a role in promoting interactions
with transcriptional co-activators such as CREB binding
protein (CBP)/p300, as well as being important for
nuclear import and deactivation of STATs involving
tyrosine de-phosphorylation. CCD interacts with other
proteins, such as IFN regulatory protein 9 (IRF-9/p48)
with STAT1 and c-JUN with STAT3 and is also thought to
participate in the negative regulation of these
proteins. Distinct genes are bound to STATs via their
DBD domain. This domain is also involved in nuclear
translocation of activated STAT1 and STAT3
phosphorylated dimers upon cytokine stimulation. LD
links the DNA-binding and SH2 domains and is important
for the transcriptional activation of STAT1 in response
to IFN-gamma. It also plays a role in protein-protein
interactions and has also been implicated in the
constitutive nucleocytoplasmic shuttling of
unphosphorylated STATs in resting cells. The SH2
domain is necessary for receptor association and
tyrosine phosphodimer formation. Residues within this
domain may be particularly important for some cellular
functions mediated by the STATs as well as residues
adjacent to this domain. The TAD interacts with
several proteins, namely minichromosome maintenance
complex component 5 (MCM5), breast cancer 1 (BRCA1) and
CBP/p300. TAD also contains a modulatory
phosphorylation site that regulates STAT activity and
is necessary for maximal transcription of a number of
target genes. The conserved tyrosine residue present in
the C-terminus is crucial for dimerization via
interaction with the SH2 domain upon the interaction of
the ligand with the receptor. STAT activation by
tyrosine phosphorylation also determines nuclear import
and retention, DNA binding to specific DNA elements in
the promoters of responsive genes, and transcriptional
activation of STAT dimers. In addition to the SH2
domain there is a coiled-coil domain, a DNA binding
domain, and a transactivation domain in the STAT
proteins. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 151
Score = 30.3 bits (68), Expect = 0.87
Identities = 17/55 (30%), Positives = 27/55 (49%), Gaps = 4/55 (7%)
Query: 36 WYRAELDGKEGLIPSNYIEMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESS 90
W + L+ LI + + + N G I++ LL ++ G FL+R SESS
Sbjct: 1 WIESILE----LIKKHLLSLWNDGCIMGFISKERERALLKDQQPGTFLLRFSESS 51
Score = 30.3 bits (68), Expect = 0.87
Identities = 17/55 (30%), Positives = 27/55 (49%), Gaps = 4/55 (7%)
Query: 215 WYRAELDGKEGLIPSNYIEMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESS 269
W + L+ LI + + + N G I++ LL ++ G FL+R SESS
Sbjct: 1 WIESILE----LIKKHLLSLWNDGCIMGFISKERERALLKDQQPGTFLLRFSESS 51
>gnl|CDD|212901 cd11968, SH3_SASH3, Src homology 3 domain of Sam And SH3 Domain
Containing Protein 3. SASH3, also called SLY/SLY1
(SH3-domain containing protein expressed in
lymphocytes), is expressed exclusively in lymhocytes and
is essential in the full activation of adaptive
immunity. It is involved in the signaling of T cell
receptors. It was the first described member of the SLY
family of proteins, which are adaptor proteins
containing a central conserved region with a bipartite
nuclear localization signal (NLS) as well as SAM
(sterile alpha motif) and SH3 domains. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 28.3 bits (63), Expect = 0.89
Identities = 12/47 (25%), Positives = 23/47 (48%), Gaps = 2/47 (4%)
Query: 162 DFTPQ--EPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
DF P + L+ ++GD+I + ++ W G + + G F Y+
Sbjct: 8 DFIPSPYDGDSLKLQKGDIIQIIEKPPVGTWTGLLNNKVGTFKFIYV 54
>gnl|CDD|212871 cd11938, SH3_ARHGEF16_26, Src homology 3 domain of the Rho guanine
nucleotide exchange factors ARHGEF16 and ARHGEF26.
ARHGEF16, also called ephexin-4, acts as a GEF for RhoG,
activating it by exchanging bound GDP for free GTP. RhoG
is a small GTPase that is a crucial regulator of Rac in
migrating cells. ARHGEF16 interacts directly with the
ephrin receptor EphA2 and mediates cell migration and
invasion in breast cancer cells by activating RhoG.
ARHGEF26, also called SGEF (SH3 domain-containing
guanine exchange factor), also activates RhoG. It is
highly expressed in liver and may play a role in
regulating membrane dynamics. ARHGEF16 and ARHGEF26
contain RhoGEF (also called Dbl-homologous or DH),
Pleckstrin Homology (PH), and SH3 domains. The SH3
domains of ARHGEFs play an autoinhibitory role through
intramolecular interactions with a proline-rich region
N-terminal to the DH domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 28.3 bits (63), Expect = 0.93
Identities = 16/50 (32%), Positives = 27/50 (54%), Gaps = 4/50 (8%)
Query: 157 VQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWHGEI---GARKGLFPA 203
V+ + +T ++P EL ++ DV+ V W++GE G R G FP+
Sbjct: 2 VEIIKAYTAKQPDELSLQQADVVLVLQTESDGWYYGERLRDGER-GWFPS 50
>gnl|CDD|212963 cd12030, SH3_DLG4, Src Homology 3 domain of Disks Large homolog 4.
DLG4, also called postsynaptic density-95 (PSD95) or
synapse-associated protein 90 (SAP90), is a scaffolding
protein that clusters at synapses and plays an important
role in synaptic development and plasticity. It is
responsible for the membrane clustering and retention of
many transporters and receptors such as potassium
channels and PMCA4b, a P-type ion transport ATPase,
among others. DLG4 is a member of the MAGUK
(membrane-associated guanylate kinase) protein family,
which is characterized by the presence of a core of
three domains: PDZ, SH3, and guanylate kinase (GuK). The
GuK domain in MAGUK proteins is enzymatically inactive;
instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. DLG4 contains three PDZ domains. The SH3
domain of DLG4 binds and clusters the kainate subgroup
of glutamate receptors via two proline-rich sequences in
their C-terminal tail. It also binds AKAP79/150
(A-kinase anchoring protein). SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 66
Score = 28.7 bits (64), Expect = 0.97
Identities = 14/40 (35%), Positives = 21/40 (52%), Gaps = 5/40 (12%)
Query: 157 VQALYDFTPQE-----PGELEFRRGDVITVTDRSDQHWWH 191
++AL+D+ + L FR GDV+ V D D+ WW
Sbjct: 4 IRALFDYDKTKDCGFLSQALSFRFGDVLHVIDAGDEEWWQ 43
>gnl|CDD|212813 cd11880, SH3_Caskin, Src Homology 3 domain of CASK interacting
protein. Caskin proteins are multidomain adaptor
proteins that contain six ankyrin repeats, a single SH3
domain, tandem sterile alpha motif (SAM) domains, and a
long disordered proline-rich region. There are two
Caskin proteins called Caskin1 and Caskin2. Caskin1
binds to the multidomain scaffolding protein CASK
through the CaM domain in competition with
Munc-interacting protein 1 (Mint1). CASK participates in
one of two evolutionarily conserved tripartite complexes
containing either Mint1 and Velis or Caskin1 and Velis.
Caskin1 may play a role in infantile myoclonic epilepsy.
There is not much known about Caskin2; despite sharing a
domain architecture with Caskin1, Caskin2 does not bind
CASK. SH3 domains bind to proline-rich ligands with
moderate affinity and selectivity, preferentially to
PxxP motifs; they play a role in the regulation of
enzymes by intramolecular interactions, changing the
subcellular localization of signal pathway components
and mediate multiprotein complex assemblies.
Length = 61
Score = 28.3 bits (63), Expect = 1.1
Identities = 17/53 (32%), Positives = 23/53 (43%), Gaps = 7/53 (13%)
Query: 157 VQALYDFTPQ-EPGELEFRRGDVITVTDRSDQHWWHGEI------GARKGLFP 202
V+A D+ + L R GD+ITV ++ W G I R G FP
Sbjct: 3 VRATKDYWNNHDLTALNVRAGDIITVLEQHPDGRWKGHIHDNQTGNDRVGYFP 55
>gnl|CDD|212726 cd11792, SH3_Fut8, Src homology 3 domain of
Alpha1,6-fucosyltransferase (Fut8). Fut8 catalyzes the
alpha1,6-linkage of a fucose residue from a donor
substrate to N-linked oligosaccharides on glycoproteins
in a process called core fucosylation, which is crucial
for growth factor receptor-mediated biological
functions. Fut8-deficient mice show severe growth
retardation, early death, and a pulmonary emphysema-like
phenotype. Fut8 is also implicated to play roles in
aging and cancer metastasis. It contains an N-terminal
coiled-coil domain, a catalytic domain, and a C-terminal
SH3 domain. The SH3 domain of Fut8 is located in the
lumen and its role in glycosyl transfer is unclear. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 27.9 bits (63), Expect = 1.1
Identities = 12/31 (38%), Positives = 17/31 (54%), Gaps = 3/31 (9%)
Query: 159 ALYDFTPQEPGELEFRRGDVITVTDRSDQHW 189
A+Y P+ E+E R GD+I V + HW
Sbjct: 4 AIYPHKPRNHDEIELRVGDIIGV---AGNHW 31
>gnl|CDD|198222 cd10359, SH2_SH3BP2, Src homology 2 domain found in c-Abl SH3
domain-binding protein-2 (SH3BP2). The adaptor protein
3BP2/SH3BP2 plays a regulatory role in signaling from
immunoreceptors. The protein-tyrosine kinase Syk
phosphorylates 3BP2 which results in the activation of
Rac1 through the interaction with the SH2 domain of Vav1
and induces the binding to the SH2 domain of the
upstream protein-tyrosine kinase Lyn and enhances its
kinase activity. 3BP2 has a positive regulatory role in
IgE-mediated mast cell activation. In lymphocytes,
engagement of T cell or B cell receptors triggers
tyrosine phosphorylation of 3BP2. Suppression of the
3BP2 expression by siRNA results in the inhibition of T
cell or B cell receptor-mediated activation of NFAT.
3BP2 is required for the proliferation of B cells and B
cell receptor signaling. Mutations in the 3BP2 gene are
responsible for cherubism resulting in excessive bone
resorption in the jaw. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 29.2 bits (65), Expect = 1.2
Identities = 24/92 (26%), Positives = 41/92 (44%), Gaps = 11/92 (11%)
Query: 66 TRADAERLL------SNKHEGAFLIRVSESSPGDFSLSV--KCSDGVQHFKVLRDSSGKF 117
+ ERL +G + IR S S+ G L V ++ V+++++ KF
Sbjct: 8 ESREVERLFKATSPKGGPQDGLYCIRNS-STKGGKVLVVWDGGAEKVRNYRIFEKDC-KF 65
Query: 118 FLWV-VKFNSLNELVEYHRTASVSRSQDVKLR 148
+L F+SL LVE++ T + + LR
Sbjct: 66 YLHEREVFSSLGSLVEHYATHVLPSHTSLTLR 97
Score = 29.2 bits (65), Expect = 1.2
Identities = 24/92 (26%), Positives = 41/92 (44%), Gaps = 11/92 (11%)
Query: 245 TRADAERLL------SNKHEGAFLIRVSESSPGDFSLSV--KCSDGVQHFKVLRDSSGKF 296
+ ERL +G + IR S S+ G L V ++ V+++++ KF
Sbjct: 8 ESREVERLFKATSPKGGPQDGLYCIRNS-STKGGKVLVVWDGGAEKVRNYRIFEKDC-KF 65
Query: 297 FLWV-VKFNSLNELVEYHRTASVSRSQDVKLR 327
+L F+SL LVE++ T + + LR
Sbjct: 66 YLHEREVFSSLGSLVEHYATHVLPSHTSLTLR 97
>gnl|CDD|241162 cd12718, RRM_BRAP2, RNA recognition motif in BRCA1-associated
protein (BRAP2). This subgroup corresponds to the RRM
of BRAP2, also termed impedes mitogenic signal
propagation (IMP), or ring finger protein 52, or renal
carcinoma antigen NY-REN-63, a novel cytoplasmic protein
interacting with the two functional nuclear localisation
signal (NLS) motifs of BRCA1, a nuclear protein linked
to breast cancer. It also binds to the SV40 large T
antigen NLS motif and the bipartite NLS motif found in
mitosin. BRAP2 may serve as a cytoplasmic retention
protein and play a role in the regulation of nuclear
protein transport. It contains an N-terminal RNA
recognition motif (RRM), also termed RBD (RNA binding
domain) or RNP (ribonucleoprotein domain), followed by a
C3HC4-type ring finger domain and a UBP-type zinc
finger. .
Length = 84
Score = 28.8 bits (65), Expect = 1.2
Identities = 10/37 (27%), Positives = 23/37 (62%)
Query: 100 CSDGVQHFKVLRDSSGKFFLWVVKFNSLNELVEYHRT 136
++H K++RDS+ ++ ++KF S + E+++T
Sbjct: 25 SLPSIEHIKIVRDSTPNQYMVLLKFRSQTDADEFYKT 61
Score = 28.8 bits (65), Expect = 1.2
Identities = 10/37 (27%), Positives = 23/37 (62%)
Query: 279 CSDGVQHFKVLRDSSGKFFLWVVKFNSLNELVEYHRT 315
++H K++RDS+ ++ ++KF S + E+++T
Sbjct: 25 SLPSIEHIKIVRDSTPNQYMVLLKFRSQTDADEFYKT 61
>gnl|CDD|198236 cd10373, SH2_STAT2, Src homology 2 (SH2) domain found in signal
transducer and activator of transcription (STAT) 2
proteins. STAT2 is a member of the STAT protein
family. In response to interferon, STAT2 forms a
complex with STAT1 and IFN regulatory factor family
protein p48 (ISGF3G), in which this protein acts as a
transactivator, but lacks the ability to bind DNA
directly. Transcription adaptor P300/CBP (EP300/CREBBP)
has been shown to interact specifically with STAT2,
which is thought to be involved in the process of
blocking IFN-alpha response by adenovirus. STAT2 has
been shown to interact with MED14, CREB-binding
protein, SMARCA4, STAT1, IFNAR2, IFNAR1, and ISGF3G.
STAT proteins mediate the signaling of cytokines and a
number of growth factors from the receptors of these
extracellular signaling molecules to the cell nucleus.
STATs are specifically phosphorylated by
receptor-associated Janus kinases, receptor tyrosine
kinases, or cytoplasmic tyrosine kinases. The
phosphorylated STAT molecules dimerize by reciprocal
binding of their SH2 domains to the phosphotyrosine
residues. These dimeric STATs translocate into the
nucleus, bind to specific DNA sequences, and regulate
the transcription of their target genes. However there
are a number of unphosphorylated STATs that travel
between the cytoplasm and nucleus and some STATs that
exist as dimers in unstimulated cells that can exert
biological functions independent of being activated.
There are seven mammalian STAT family members which
have been identified: STAT1, STAT2, STAT3, STAT4, STAT5
(STAT5A and STAT5B), and STAT6. There are 6 conserved
domains in STAT: N-terminal domain (NTD), coiled-coil
domain (CCD), DNA-binding domain (DBD), alpha-helical
linker domain (LD), SH2 domain, and transactivation
domain (TAD). NTD is involved in dimerization of
unphosphorylated STATs monomers and for the
tetramerization between STAT1, STAT3, STAT4 and STAT5
on promoters with two or more tandem STAT binding
sites. It also plays a role in promoting interactions
with transcriptional co-activators such as CREB binding
protein (CBP)/p300, as well as being important for
nuclear import and deactivation of STATs involving
tyrosine de-phosphorylation. CCD interacts with other
proteins, such as IFN regulatory protein 9 (IRF-9/p48)
with STAT1 and c-JUN with STAT3 and is also thought to
participate in the negative regulation of these
proteins. Distinct genes are bound to STATs via their
DBD domain. This domain is also involved in nuclear
translocation of activated STAT1 and STAT3
phosphorylated dimers upon cytokine stimulation. LD
links the DNA-binding and SH2 domains and is important
for the transcriptional activation of STAT1 in response
to IFN-gamma. It also plays a role in protein-protein
interactions and has also been implicated in the
constitutive nucleocytoplasmic shuttling of
unphosphorylated STATs in resting cells. The SH2
domain is necessary for receptor association and
tyrosine phosphodimer formation. Residues within this
domain may be particularly important for some cellular
functions mediated by the STATs as well as residues
adjacent to this domain. The TAD interacts with
several proteins, namely minichromosome maintenance
complex component 5 (MCM5), breast cancer 1 (BRCA1) and
CBP/p300. TAD also contains a modulatory
phosphorylation site that regulates STAT activity and
is necessary for maximal transcription of a number of
target genes. The conserved tyrosine residue present in
the C-terminus is crucial for dimerization via
interaction with the SH2 domain upon the interaction of
the ligand with the receptor. STAT activation by
tyrosine phosphorylation also determines nuclear import
and retention, DNA binding to specific DNA elements in
the promoters of responsive genes, and transcriptional
activation of STAT dimers. In addition to the SH2
domain there is a coiled-coil domain, a DNA binding
domain, and a transactivation domain in the STAT
proteins. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 151
Score = 29.9 bits (67), Expect = 1.4
Identities = 17/42 (40%), Positives = 21/42 (50%), Gaps = 4/42 (9%)
Query: 60 WYYGRI----TRADAERLLSNKHEGAFLIRVSESSPGDFSLS 97
W GRI +R RLL G FL+R SE+S G + S
Sbjct: 17 WKDGRIMGFVSRNQERRLLKKTISGTFLLRFSETSEGGITCS 58
Score = 29.9 bits (67), Expect = 1.4
Identities = 17/42 (40%), Positives = 21/42 (50%), Gaps = 4/42 (9%)
Query: 239 WYYGRI----TRADAERLLSNKHEGAFLIRVSESSPGDFSLS 276
W GRI +R RLL G FL+R SE+S G + S
Sbjct: 17 WKDGRIMGFVSRNQERRLLKKTISGTFLLRFSETSEGGITCS 58
>gnl|CDD|212786 cd11852, SH3_Kalirin_1, First Src homology 3 domain of the RhoGEF
kinase, Kalirin. Kalirin, also called Duo, Duet, or
TRAD, is a large neuronal dual Rho guanine nucleotide
exchange factor (RhoGEF) that activates Rac1, RhoA, and
RhoG using two RhoGEF domains. Kalirin exists in many
isoforms generated by alternative splicing and the use
of multiple promoters; the major isoforms are
kalirin-7, -9, and -12, which differ at their
C-terminal ends. Kalirin-12, the longest isoform,
contains an N-terminal Sec14p domain, spectrin-like
repeats, two RhoGEF domains, two SH3 domains, as well
as Ig, FNIII, and kinase domains at the C-terminal end.
Kalirin-7 contains only a single RhoGEF domain and does
not contain an SH3 domain. Kalirin, through its many
isoforms, interacts with many different proteins and is
able to localize to different locations within the
cell. It influences neurite initiation, axon growth,
dendritic morphogenesis, vesicle trafficking, neuronal
maintenance, and neurodegeneration. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 62
Score = 27.7 bits (62), Expect = 1.6
Identities = 16/52 (30%), Positives = 24/52 (46%), Gaps = 7/52 (13%)
Query: 7 HDFNATAEDELSFRKSQVLKILN-MEDDMNWY--RAELDGK----EGLIPSN 51
DF AT+ EL+ K Q +++L +W R EGL+PS+
Sbjct: 7 EDFEATSSQELTVSKGQTVEVLERPSSRPDWCLVRTLEQDNSPPQEGLVPSS 58
>gnl|CDD|212964 cd12031, SH3_DLG1, Src Homology 3 domain of Disks Large homolog 1.
DLG1, also called synapse-associated protein 97 (SAP97),
is a scaffolding protein that clusters at synapses and
plays an important role in synaptic development and
plasticity. DLG1 plays roles in regulating cell
polarity, proliferation, migration, and cycle
progression. It interacts with AMPA-type glutamate
receptors and is critical in their maturation and
delivery to synapses. It also interacts with PKCalpha
and promotes wound healing. DLG1 is a member of the
MAGUK (membrane-associated guanylate kinase) protein
family, which is characterized by the presence of a core
of three domains: PDZ, SH3, and guanylate kinase (GuK).
The GuK domain in MAGUK proteins is enzymatically
inactive; instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. DLG1 contains three PDZ domains. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 67
Score = 28.1 bits (62), Expect = 1.6
Identities = 14/41 (34%), Positives = 23/41 (56%), Gaps = 5/41 (12%)
Query: 157 VQALYDFTPQE----PGE-LEFRRGDVITVTDRSDQHWWHG 192
V+AL+D+ + P + L F+ GD++ V + SD WW
Sbjct: 5 VRALFDYDKTKDSGLPSQGLNFKFGDILHVVNASDDEWWQA 45
>gnl|CDD|238517 cd01083, GAG_Lyase, Glycosaminoglycan (GAG) polysaccharide lyase
family. This family consists of a group of secreted
bacterial lyase enzymes capable of acting on
glycosaminoglycans, such as hyaluronan and chondroitin,
in the extracellular matrix of host tissues,
contributing to the invasive capacity of the pathogen.
These are broad-specificity glycosaminoglycan lyases
which recognize uronyl residues in polysaccharides and
cleave their glycosidic bonds via a beta-elimination
reaction to form a double bond between C-4 and C-5 of
the non-reducing terminal uronyl residues of released
products. Substrates include chondroitin, chondroitin
4-sulfate, chondroitin 6-sulfate, and hyaluronic acid.
Family members include chondroitin AC lyase, chondroitin
abc lyase, xanthan lyase, and hyalurate lyase.
Length = 693
Score = 30.4 bits (69), Expect = 1.6
Identities = 18/90 (20%), Positives = 31/90 (34%), Gaps = 18/90 (20%)
Query: 124 FNSLNELVEYHRTASVSRSQDVKLRDMVPEECLVQALYDFTPQEPGELEFRRGDVITVTD 183
+ L L + + T + QD +L+ + + AL Q
Sbjct: 67 YRRLETLAKAYTTPGSTYYQDEELKSDI-----LDALDYLYDQGY-----------NDGK 110
Query: 184 RSDQHWWHGEIGARKGLFPATYILNMEDDM 213
S +WW EIG + L + M D++
Sbjct: 111 GSYGNWWDWEIGIPRALNNTLVL--MYDEL 138
>gnl|CDD|198237 cd10374, SH2_STAT3, Src homology 2 (SH2) domain found in signal
transducer and activator of transcription (STAT) 3
proteins. STAT3 encoded by this gene is a member of
the STAT protein family. STAT3 mediates the expression
of a variety of genes in response to cell stimuli, and
plays a key role in many cellular processes such as
cell growth and apoptosis. The small GTPase Rac1
regulates the activity of STAT3 and PIAS3 inhibits it.
Three alternatively spliced transcript variants
encoding distinct isoforms have been described. STAT 3
activation is required for self-renewal of embryonic
stem cells (ESCs) and is essential for the
differentiation of the TH17 helper T cells. Mutations
in the STAT3 gene result in Hyperimmunoglobulin E
syndrome and human cancers. STAT3 has been shown to
interact with Androgen receptor, C-jun, ELP2, EP300,
Epidermal growth factor receptor, Glucocorticoid
receptor, HIF1A, Janus kinase 1, KHDRBS1, Mammalian
target of rapamycin, MyoD, NDUFA13, NFKB1, Nuclear
receptor coactivator 1, Promyelocytic leukemia protein,
RAC1, RELA, RET proto-oncogene, RPA2, Src, STAT1, and
TRIP10. STAT proteins mediate the signaling of
cytokines and a number of growth factors from the
receptors of these extracellular signaling molecules to
the cell nucleus. STATs are specifically phosphorylated
by receptor-associated Janus kinases, receptor tyrosine
kinases, or cytoplasmic tyrosine kinases. The
phosphorylated STAT molecules dimerize by reciprocal
binding of their SH2 domains to the phosphotyrosine
residues. These dimeric STATs translocate into the
nucleus, bind to specific DNA sequences, and regulate
the transcription of their target genes. However there
are a number of unphosphorylated STATs that travel
between the cytoplasm and nucleus and some STATs that
exist as dimers in unstimulated cells that can exert
biological functions independent of being activated.
There are seven mammalian STAT family members which
have been identified: STAT1, STAT2, STAT3, STAT4, STAT5
(STAT5A and STAT5B), and STAT6. There are 6 conserved
domains in STAT: N-terminal domain (NTD), coiled-coil
domain (CCD), DNA-binding domain (DBD), alpha-helical
linker domain (LD), SH2 domain, and transactivation
domain (TAD). NTD is involved in dimerization of
unphosphorylated STATs monomers and for the
tetramerization between STAT1, STAT3, STAT4 and STAT5
on promoters with two or more tandem STAT binding
sites. It also plays a role in promoting interactions
with transcriptional co-activators such as CREB binding
protein (CBP)/p300, as well as being important for
nuclear import and deactivation of STATs involving
tyrosine de-phosphorylation. CCD interacts with other
proteins, such as IFN regulatory protein 9 (IRF-9/p48)
with STAT1 and c-JUN with STAT3 and is also thought to
participate in the negative regulation of these
proteins. Distinct genes are bound to STATs via their
DBD domain. This domain is also involved in nuclear
translocation of activated STAT1 and STAT3
phosphorylated dimers upon cytokine stimulation. LD
links the DNA-binding and SH2 domains and is important
for the transcriptional activation of STAT1 in response
to IFN-gamma. It also plays a role in protein-protein
interactions and has also been implicated in the
constitutive nucleocytoplasmic shuttling of
unphosphorylated STATs in resting cells. The SH2 domain
is necessary for receptor association and tyrosine
phosphodimer formation. Residues within this domain may
be particularly important for some cellular functions
mediated by the STATs as well as residues adjacent to
this domain. The TAD interacts with several proteins,
namely minichromosome maintenance complex component 5
(MCM5), breast cancer 1 (BRCA1) and CBP/p300. TAD also
contains a modulatory phosphorylation site that
regulates STAT activity and is necessary for maximal
transcription of a number of target genes. The
conserved tyrosine residue present in the C-terminus is
crucial for dimerization via interaction with the SH2
domain upon the interaction of the ligand with the
receptor. STAT activation by tyrosine phosphorylation
also determines nuclear import and retention, DNA
binding to specific DNA elements in the promoters of
responsive genes, and transcriptional activation of
STAT dimers. In addition to the SH2 domain there is a
coiled-coil domain, a DNA binding domain, and a
transactivation domain in the STAT proteins. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 162
Score = 29.6 bits (66), Expect = 1.7
Identities = 17/50 (34%), Positives = 25/50 (50%)
Query: 41 LDGKEGLIPSNYIEMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESS 90
LD L+ + + N + G I++ +LS K G FL+R SESS
Sbjct: 12 LDNIIDLVKKYILALWNEGYIMGFISKERERAILSTKPPGTFLLRFSESS 61
Score = 29.6 bits (66), Expect = 1.7
Identities = 17/50 (34%), Positives = 25/50 (50%)
Query: 220 LDGKEGLIPSNYIEMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESS 269
LD L+ + + N + G I++ +LS K G FL+R SESS
Sbjct: 12 LDNIIDLVKKYILALWNEGYIMGFISKERERAILSTKPPGTFLLRFSESS 61
>gnl|CDD|198239 cd10376, SH2_STAT5, Src homology 2 (SH2) domain found in signal
transducer and activator of transcription (STAT) 5
proteins. STAT5 is a member of the STAT family of
transcription factors. Two highly related proteins,
STAT5a and STAT5b are encoded by separate genes, but
are 90% identical at the amino acid level. Both STAT5a
and STAT5b are ubiquitously expressed and functionally
interchangeable. Mice lacking either STAT5a or STAT5b
have mild defects in prolactin dependent mammary
differentiation or sexually dimorphic growth
hormone-dependent effects, respectively. Mice lacking
both STAT5a and STAT5b exhibit a perinatal lethal
phenotype and have multiple defects, including anemia
and a virtual absence of B and T lymphocytes. STAT
proteins mediate the signaling of cytokines and a
number of growth factors from the receptors of these
extracellular signaling molecules to the cell nucleus.
STATs are specifically phosphorylated by
receptor-associated Janus kinases, receptor tyrosine
kinases, or cytoplasmic tyrosine kinases. The
phosphorylated STAT molecules dimerize by reciprocal
binding of their SH2 domains to the phosphotyrosine
residues. These dimeric STATs translocate into the
nucleus, bind to specific DNA sequences, and regulate
the transcription of their target genes. However there
are a number of unphosphorylated STATs that travel
between the cytoplasm and nucleus and some STATs that
exist as dimers in unstimulated cells that can exert
biological functions independent of being activated.
There are seven mammalian STAT family members which
have been identified: STAT1, STAT2, STAT3, STAT4, STAT5
(STAT5A and STAT5B), and STAT6. There are 6 conserved
domains in STAT: N-terminal domain (NTD), coiled-coil
domain (CCD), DNA-binding domain (DBD), alpha-helical
linker domain (LD), SH2 domain, and transactivation
domain (TAD). NTD is involved in dimerization of
unphosphorylated STATs monomers and for the
tetramerization between STAT1, STAT3, STAT4 and STAT5
on promoters with two or more tandem STAT binding
sites. It also plays a role in promoting interactions
with transcriptional co-activators such as CREB binding
protein (CBP)/p300, as well as being important for
nuclear import and deactivation of STATs involving
tyrosine de-phosphorylation. CCD interacts with other
proteins, such as IFN regulatory protein 9 (IRF-9/p48)
with STAT1 and c-JUN with STAT3 and is also thought to
participate in the negative regulation of these
proteins. Distinct genes are bound to STATs via their
DBD domain. This domain is also involved in nuclear
translocation of activated STAT1 and STAT3
phosphorylated dimers upon cytokine stimulation. LD
links the DNA-binding and SH2 domains and is important
for the transcriptional activation of STAT1 in response
to IFN-gamma. It also plays a role in protein-protein
interactions and has also been implicated in the
constitutive nucleocytoplasmic shuttling of
unphosphorylated STATs in resting cells. The SH2
domain is necessary for receptor association and
tyrosine phosphodimer formation. Residues within this
domain may be particularly important for some cellular
functions mediated by the STATs as well as residues
adjacent to this domain. The TAD interacts with
several proteins, namely minichromosome maintenance
complex component 5 (MCM5), breast cancer 1 (BRCA1) and
CBP/p300. TAD also contains a modulatory
phosphorylation site that regulates STAT activity and
is necessary for maximal transcription of a number of
target genes. The conserved tyrosine residue present in
the C-terminus is crucial for dimerization via
interaction with the SH2 domain upon the interaction of
the ligand with the receptor. STAT activation by
tyrosine phosphorylation also determines nuclear import
and retention, DNA binding to specific DNA elements in
the promoters of responsive genes, and transcriptional
activation of STAT dimers. In addition to the SH2
domain there is a coiled-coil domain, a DNA binding
domain, and a transactivation domain in the STAT
proteins.
Length = 137
Score = 29.2 bits (65), Expect = 1.8
Identities = 14/37 (37%), Positives = 22/37 (59%)
Query: 63 GRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVK 99
G + + A LL NK +G FL+R S+S G +++ K
Sbjct: 24 GFVNKQQAHDLLINKPDGTFLLRFSDSEIGGITIAWK 60
Score = 29.2 bits (65), Expect = 1.8
Identities = 14/37 (37%), Positives = 22/37 (59%)
Query: 242 GRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVK 278
G + + A LL NK +G FL+R S+S G +++ K
Sbjct: 24 GFVNKQQAHDLLINKPDGTFLLRFSDSEIGGITIAWK 60
>gnl|CDD|212843 cd11910, SH3_PI3K_p85alpha, Src Homology 3 domain of the p85alpha
regulatory subunit of Class IA Phosphatidylinositol
3-kinases. Class I PI3Ks convert PtdIns(4,5)P2 to the
critical second messenger PtdIns(3,4,5)P3. They are
heterodimers and exist in multiple isoforms consisting
of one catalytic subunit (out of four isoforms) and one
of several regulatory subunits. Class IA PI3Ks associate
with the p85 regulatory subunit family, which contains
SH3, RhoGAP, and SH2 domains. The p85 subunits recruit
the PI3K p110 catalytic subunit to the membrane, where
p110 phosphorylates inositol lipids. Vertebrates harbor
two p85 isoforms, called alpha and beta. In addition to
regulating the p110 subunit, p85alpha interacts with
activated FGFR3. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 75
Score = 27.9 bits (62), Expect = 2.0
Identities = 16/66 (24%), Positives = 29/66 (43%), Gaps = 17/66 (25%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVT--------------DRSDQHWW---HGEIGARKGL 200
+ALYD+ + +++ GD++TV R ++ W + E +G
Sbjct: 5 RALYDYKKEREEDIDLHLGDILTVNKGSLLALGFSEGQEARPEEIGWLNGYNETTGERGD 64
Query: 201 FPATYI 206
FP TY+
Sbjct: 65 FPGTYV 70
>gnl|CDD|212829 cd11896, SH3_SNX33, Src Homology 3 domain of Sorting Nexin 33.
SNX33 interacts with Wiskott-Aldrich syndrome protein
(WASP) and plays a role in the maintenance of cell shape
and cell cycle progression. It modulates the shedding
and endocytosis of cellular prion protein (PrP(c)) and
amyloid precursor protein (APP). SNXs are Phox homology
(PX) domain containing proteins that are involved in
regulating membrane traffic and protein sorting in the
endosomal system. SNX33 also contains BAR and SH3
domains. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 27.2 bits (60), Expect = 2.1
Identities = 14/51 (27%), Positives = 26/51 (50%), Gaps = 2/51 (3%)
Query: 158 QALYDFTPQEPGELEFRRG-DVITVTDRSDQHWWHGEIG-ARKGLFPATYI 206
+ALY F + E+ + +++ ++ S W G+ GLFPA+Y+
Sbjct: 3 RALYSFQSENKEEINIQENEELVIFSENSLDGWLQGQNSRGETGLFPASYV 53
>gnl|CDD|198284 cd10421, SH2_STAT5a, Src homology 2 (SH2) domain found in signal
transducer and activator of transcription (STAT) 5a
proteins. STAT5 is a member of the STAT family of
transcription factors. Two highly related proteins,
STAT5a and STAT5b are encoded by separate genes, but
are 90% identical at the amino acid level. Both STAT5a
and STAT5b are ubiquitously expressed and functionally
interchangeable. Mice lacking either STAT5a or STAT5b
have mild defects in prolactin dependent mammary
differentiation or sexually dimorphic growth
hormone-dependent effects, respectively. Mice lacking
both STAT5a and STAT5b exhibit a perinatal lethal
phenotype and have multiple defects, including anemia
and a virtual absence of B and T lymphocytes. STAT
proteins mediate the signaling of cytokines and a
number of growth factors from the receptors of these
extracellular signaling molecules to the cell nucleus.
STATs are specifically phosphorylated by
receptor-associated Janus kinases, receptor tyrosine
kinases, or cytoplasmic tyrosine kinases. The
phosphorylated STAT molecules dimerize by reciprocal
binding of their SH2 domains to the phosphotyrosine
residues. These dimeric STATs translocate into the
nucleus, bind to specific DNA sequences, and regulate
the transcription of their target genes. However there
are a number of unphosphorylated STATs that travel
between the cytoplasm and nucleus and some STATs that
exist as dimers in unstimulated cells that can exert
biological functions independent of being activated.
There are seven mammalian STAT family members which
have been identified: STAT1, STAT2, STAT3, STAT4, STAT5
(STAT5A and STAT5B), and STAT6. There are 6 conserved
domains in STAT: N-terminal domain (NTD), coiled-coil
domain (CCD), DNA-binding domain (DBD), alpha-helical
linker domain (LD), SH2 domain, and transactivation
domain (TAD). NTD is involved in dimerization of
unphosphorylated STATs monomers and for the
tetramerization between STAT1, STAT3, STAT4 and STAT5
on promoters with two or more tandem STAT binding
sites. It also plays a role in promoting interactions
with transcriptional co-activators such as CREB binding
protein (CBP)/p300, as well as being important for
nuclear import and deactivation of STATs involving
tyrosine de-phosphorylation. CCD interacts with other
proteins, such as IFN regulatory protein 9 (IRF-9/p48)
with STAT1 and c-JUN with STAT3 and is also thought to
participate in the negative regulation of these
proteins. Distinct genes are bound to STATs via their
DBD domain. This domain is also involved in nuclear
translocation of activated STAT1 and STAT3
phosphorylated dimers upon cytokine stimulation. LD
links the DNA-binding and SH2 domains and is important
for the transcriptional activation of STAT1 in response
to IFN-gamma. It also plays a role in protein-protein
interactions and has also been implicated in the
constitutive nucleocytoplasmic shuttling of
unphosphorylated STATs in resting cells. The SH2
domain is necessary for receptor association and
tyrosine phosphodimer formation. Residues within this
domain may be particularly important for some cellular
functions mediated by the STATs as well as residues
adjacent to this domain. The TAD interacts with
several proteins, namely minichromosome maintenance
complex component 5 (MCM5), breast cancer 1 (BRCA1) and
CBP/p300. TAD also contains a modulatory
phosphorylation site that regulates STAT activity and
is necessary for maximal transcription of a number of
target genes. The conserved tyrosine residue present in
the C-terminus is crucial for dimerization via
interaction with the SH2 domain upon the interaction of
the ligand with the receptor. STAT activation by
tyrosine phosphorylation also determines nuclear import
and retention, DNA binding to specific DNA elements in
the promoters of responsive genes, and transcriptional
activation of STAT dimers. In addition to the SH2
domain there is a coiled-coil domain, a DNA binding
domain, and a transactivation domain in the STAT
proteins. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 140
Score = 28.9 bits (64), Expect = 2.1
Identities = 14/37 (37%), Positives = 22/37 (59%)
Query: 63 GRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVK 99
G + + A LL NK +G FL+R S+S G +++ K
Sbjct: 24 GFVNKQQAHDLLINKPDGTFLLRFSDSEIGGITIAWK 60
Score = 28.9 bits (64), Expect = 2.1
Identities = 14/37 (37%), Positives = 22/37 (59%)
Query: 242 GRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVK 278
G + + A LL NK +G FL+R S+S G +++ K
Sbjct: 24 GFVNKQQAHDLLINKPDGTFLLRFSDSEIGGITIAWK 60
>gnl|CDD|212965 cd12032, SH3_DLG2, Src Homology 3 domain of Disks Large homolog 2.
DLG2, also called postsynaptic density-93 (PSD93) or
Channel-associated protein of synapse-110 (chapsyn 110),
is a scaffolding protein that clusters at synapses and
plays an important role in synaptic development and
plasticity. The DLG2 delta isoform binds inwardly
rectifying potassium Kir2 channels, which determine
resting membrane potential in neurons. It regulates the
spatial and temporal distribution of Kir2 channels
within neuronal membranes. DLG2 is a member of the MAGUK
(membrane-associated guanylate kinase) protein family,
which is characterized by the presence of a core of
three domains: PDZ, SH3, and guanylate kinase (GuK). The
GuK domain in MAGUK proteins is enzymatically inactive;
instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. DLG2 contains three PDZ domains. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 74
Score = 27.7 bits (61), Expect = 2.2
Identities = 14/41 (34%), Positives = 23/41 (56%), Gaps = 5/41 (12%)
Query: 157 VQALYDFTPQE----PGE-LEFRRGDVITVTDRSDQHWWHG 192
V+A++D+ + P + L FR GD++ V + SD WW
Sbjct: 8 VRAMFDYEKSKDSGLPSQGLSFRYGDILHVINASDDEWWQA 48
>gnl|CDD|212826 cd11893, SH3_MIA3, Src Homology 3 domain of Melanoma Inhibitory
Activity 3 protein. MIA3, also called TANGO or TANGO1,
acts as a tumor suppressor of malignant melanoma. It is
downregulated or lost in melanoma cells lines. Unlike
other MIA family members, MIA3 is widely expressed
except in hematopoietic cells. MIA3 is an ER resident
transmembrane protein that is required for the loading
of collagen VII into transport vesicles. SNPs in the
MIA3 gene have been associated with coronary arterial
disease and myocardial infarction. MIA3 contains an
N-terminal SH3-like domain, similar to MIA. It is a
member of the recently identified family that also
includes MIA, MIAL, and MIA2. MIA is a single domain
protein that adopts a SH3 domain-like fold; it contains
an additional antiparallel beta sheet and two disulfide
bonds compared to classical SH3 domains. Unlike
classical SH3 domains, MIA does not bind proline-rich
ligands.
Length = 73
Score = 27.5 bits (61), Expect = 2.2
Identities = 16/55 (29%), Positives = 25/55 (45%), Gaps = 3/55 (5%)
Query: 155 CLVQALYDFTPQEPGELEFRRGDVITVTDRSDQHW---WHGEIGARKGLFPATYI 206
C +A+ DFT + L F++G+ I V + W G +G G FP +
Sbjct: 12 CRGKAVKDFTGPDCRFLSFKKGETIYVYYKLSGRRTDLWAGSVGFDFGYFPKDLL 66
>gnl|CDD|198283 cd10420, SH2_STAT5b, Src homology 2 (SH2) domain found in signal
transducer and activator of transcription (STAT) 5b
proteins. STAT5 is a member of the STAT family of
transcription factors. Two highly related proteins,
STAT5a and STAT5b are encoded by separate genes, but
are 90% identical at the amino acid level. Both STAT5a
and STAT5b are ubiquitously expressed and functionally
interchangeable. Mice lacking either STAT5a or STAT5b
have mild defects in prolactin dependent mammary
differentiation or sexually dimorphic growth
hormone-dependent effects, respectively. Mice lacking
both STAT5a and STAT5b exhibit a perinatal lethal
phenotype and have multiple defects, including anemia
and a virtual absence of B and T lymphocytes. STAT
proteins mediate the signaling of cytokines and a
number of growth factors from the receptors of these
extracellular signaling molecules to the cell nucleus.
STATs are specifically phosphorylated by
receptor-associated Janus kinases, receptor tyrosine
kinases, or cytoplasmic tyrosine kinases. The
phosphorylated STAT molecules dimerize by reciprocal
binding of their SH2 domains to the phosphotyrosine
residues. These dimeric STATs translocate into the
nucleus, bind to specific DNA sequences, and regulate
the transcription of their target genes. However there
are a number of unphosphorylated STATs that travel
between the cytoplasm and nucleus and some STATs that
exist as dimers in unstimulated cells that can exert
biological functions independent of being activated.
There are seven mammalian STAT family members which
have been identified: STAT1, STAT2, STAT3, STAT4, STAT5
(STAT5A and STAT5B), and STAT6. There are 6 conserved
domains in STAT: N-terminal domain (NTD), coiled-coil
domain (CCD), DNA-binding domain (DBD), alpha-helical
linker domain (LD), SH2 domain, and transactivation
domain (TAD). NTD is involved in dimerization of
unphosphorylated STATs monomers and for the
tetramerization between STAT1, STAT3, STAT4 and STAT5
on promoters with two or more tandem STAT binding
sites. It also plays a role in promoting interactions
with transcriptional co-activators such as CREB binding
protein (CBP)/p300, as well as being important for
nuclear import and deactivation of STATs involving
tyrosine de-phosphorylation. CCD interacts with other
proteins, such as IFN regulatory protein 9 (IRF-9/p48)
with STAT1 and c-JUN with STAT3 and is also thought to
participate in the negative regulation of these
proteins. Distinct genes are bound to STATs via their
DBD domain. This domain is also involved in nuclear
translocation of activated STAT1 and STAT3
phosphorylated dimers upon cytokine stimulation. LD
links the DNA-binding and SH2 domains and is important
for the transcriptional activation of STAT1 in response
to IFN-gamma. It also plays a role in protein-protein
interactions and has also been implicated in the
constitutive nucleocytoplasmic shuttling of
unphosphorylated STATs in resting cells. The SH2
domain is necessary for receptor association and
tyrosine phosphodimer formation. Residues within this
domain may be particularly important for some cellular
functions mediated by the STATs as well as residues
adjacent to this domain. The TAD interacts with
several proteins, namely minichromosome maintenance
complex component 5 (MCM5), breast cancer 1 (BRCA1) and
CBP/p300. TAD also contains a modulatory
phosphorylation site that regulates STAT activity and
is necessary for maximal transcription of a number of
target genes. The conserved tyrosine residue present in
the C-terminus is crucial for dimerization via
interaction with the SH2 domain upon the interaction of
the ligand with the receptor. STAT activation by
tyrosine phosphorylation also determines nuclear import
and retention, DNA binding to specific DNA elements in
the promoters of responsive genes, and transcriptional
activation of STAT dimers. In addition to the SH2
domain there is a coiled-coil domain, a DNA binding
domain, and a transactivation domain in the STAT
proteins. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 145
Score = 28.9 bits (64), Expect = 2.3
Identities = 14/37 (37%), Positives = 22/37 (59%)
Query: 63 GRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVK 99
G + + A LL NK +G FL+R S+S G +++ K
Sbjct: 24 GFVNKQQAHDLLINKPDGTFLLRFSDSEIGGITIAWK 60
Score = 28.9 bits (64), Expect = 2.3
Identities = 14/37 (37%), Positives = 22/37 (59%)
Query: 242 GRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVK 278
G + + A LL NK +G FL+R S+S G +++ K
Sbjct: 24 GFVNKQQAHDLLINKPDGTFLLRFSDSEIGGITIAWK 60
>gnl|CDD|198201 cd10338, SH2_SHA, Src homology 2 (SH2) domain found in SH2 adaptor
proteins A (SHA) Signal transducers. Signal transducing
adaptor proteins are accessory to main proteins in a
signal transduction pathway. These proteins lack
intrinsic enzymatic activity, but mediate specific
protein-protein interactions that drive the formation of
protein complexes. Adaptor proteins usually contain
several domains within their structure (e.g. SH2 and SH3
domains) which allow specific interactions with several
other specific proteins. Not much is known about the SHA
protein except that it is predicted to act as a
transcription factor. Arabidopsis SHA pulled down a
120-kD tyrosine-phosphorylated protein in vitro. In
addition to the SH2 domain there is a coiled-coil
domain, a DNA binding domain, and a transactivation
domain in the STAT proteins. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 106
Score = 28.3 bits (63), Expect = 2.4
Identities = 19/59 (32%), Positives = 28/59 (47%), Gaps = 6/59 (10%)
Query: 58 HDWYYGRITRADAERLLSNKHEGAFLIR--VSESSP----GDFSLSVKCSDGVQHFKVL 110
W G IT+ +AER L + G F++R S S P G ++ D V H ++L
Sbjct: 10 PKWIEGFITKEEAERSLQGQVPGTFILRFPTSRSWPHPDAGSLVVTYVGHDLVIHHRLL 68
Score = 28.3 bits (63), Expect = 2.4
Identities = 19/59 (32%), Positives = 28/59 (47%), Gaps = 6/59 (10%)
Query: 237 HDWYYGRITRADAERLLSNKHEGAFLIR--VSESSP----GDFSLSVKCSDGVQHFKVL 289
W G IT+ +AER L + G F++R S S P G ++ D V H ++L
Sbjct: 10 PKWIEGFITKEEAERSLQGQVPGTFILRFPTSRSWPHPDAGSLVVTYVGHDLVIHHRLL 68
>gnl|CDD|212962 cd12029, SH3_DLG3, Src Homology 3 domain of Disks Large homolog 3.
DLG3, also called synapse-associated protein 102
(SAP102), is a scaffolding protein that clusters at
synapses and plays an important role in synaptic
development and plasticity. Mutations in DLG3 cause
midgestational embryonic lethality in mice and may be
associated with nonsyndromic X-linked mental retardation
in humans. It interacts with the NEDD4 (neural precursor
cell-expressed developmentally downregulated 4) family
of ubiquitin ligases and promotes apical tight junction
formation. DLG3 is a member of the MAGUK
(membrane-associated guanylate kinase) protein family,
which is characterized by the presence of a core of
three domains: PDZ, SH3, and guanylate kinase (GuK). The
GuK domain in MAGUK proteins is enzymatically inactive;
instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. DLG3 contains three PDZ domains. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 67
Score = 27.4 bits (60), Expect = 2.4
Identities = 14/43 (32%), Positives = 22/43 (51%), Gaps = 5/43 (11%)
Query: 157 VQALYDFTPQE----PGE-LEFRRGDVITVTDRSDQHWWHGEI 194
V+AL+D+ P + L F GD++ V + SD WW +
Sbjct: 5 VRALFDYDRTRDSCLPSQGLSFSYGDILHVINASDDEWWQARL 47
>gnl|CDD|212842 cd11909, SH3_PI3K_p85beta, Src Homology 3 domain of the p85beta
regulatory subunit of Class IA Phosphatidylinositol
3-kinases. Class I PI3Ks convert PtdIns(4,5)P2 to the
critical second messenger PtdIns(3,4,5)P3. They are
heterodimers and exist in multiple isoforms consisting
of one catalytic subunit (out of four isoforms) and one
of several regulatory subunits. Class IA PI3Ks associate
with the p85 regulatory subunit family, which contains
SH3, RhoGAP, and SH2 domains. The p85 subunits recruit
the PI3K p110 catalytic subunit to the membrane, where
p110 phosphorylates inositol lipids. Vertebrates harbor
two p85 isoforms, called alpha and beta. In addition to
regulating the p110 subunit, p85beta binds CD28 and may
be involved in the activation and differentiation of
antigen-stimulated T cells. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 74
Score = 27.5 bits (61), Expect = 3.1
Identities = 17/66 (25%), Positives = 30/66 (45%), Gaps = 17/66 (25%)
Query: 158 QALYDFTPQEPGELEFRRGDVITVT----------DRSDQH-----WWHG--EIGARKGL 200
+ALY + + +++ GDV+TV+ + +Q W G E ++G
Sbjct: 4 RALYPYRKEREEDIDLLPGDVLTVSRAALQALGVKEGGEQCPQSIGWILGLNERTKQRGD 63
Query: 201 FPATYI 206
FP TY+
Sbjct: 64 FPGTYV 69
>gnl|CDD|184325 PRK13786, PRK13786, adenylosuccinate synthetase; Provisional.
Length = 424
Score = 29.4 bits (66), Expect = 3.4
Identities = 13/42 (30%), Positives = 25/42 (59%)
Query: 144 DVKLRDMVPEECLVQALYDFTPQEPGELEFRRGDVITVTDRS 185
+V++ D+V +E L++ L + PQ+ E++ GD V D +
Sbjct: 143 EVRMSDLVDKERLMRRLEELAPQKEKEIKELGGDPSIVRDEA 184
>gnl|CDD|184794 PRK14697, PRK14697, bifunctional
5'-methylthioadenosine/S-adenosylhomocysteine
nucleosidase/phosphatase; Provisional.
Length = 233
Score = 28.8 bits (64), Expect = 4.0
Identities = 31/132 (23%), Positives = 52/132 (39%), Gaps = 18/132 (13%)
Query: 34 MNWYRAELDGKEGLIPSNYIEMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGD 93
M +Y E G E ++ + G++ A + L +K + +I + G
Sbjct: 32 MPFYVGEFMGTEVIVTRCGV---------GKVNAAACTQTLIHKFDVDAIINTGVA--GG 80
Query: 94 FSLSVKCSD-----GVQHFKVLRDSSGKFFLWVVKFNSLNELVEYHRTASVSRSQDVKLR 148
VK D V H V + F + +F + ELVE R A S S +++
Sbjct: 81 LHPDVKVGDIVISTNVTHHDVSKTQMKNLFPFQEEFIASKELVELARKACNSSSLHIEIH 140
Query: 149 D--MVPEECLVQ 158
+ +V EC V+
Sbjct: 141 EGRIVSGECFVE 152
Score = 28.8 bits (64), Expect = 4.0
Identities = 31/132 (23%), Positives = 52/132 (39%), Gaps = 18/132 (13%)
Query: 213 MNWYRAELDGKEGLIPSNYIEMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGD 272
M +Y E G E ++ + G++ A + L +K + +I + G
Sbjct: 32 MPFYVGEFMGTEVIVTRCGV---------GKVNAAACTQTLIHKFDVDAIINTGVA--GG 80
Query: 273 FSLSVKCSD-----GVQHFKVLRDSSGKFFLWVVKFNSLNELVEYHRTASVSRSQDVKLR 327
VK D V H V + F + +F + ELVE R A S S +++
Sbjct: 81 LHPDVKVGDIVISTNVTHHDVSKTQMKNLFPFQEEFIASKELVELARKACNSSSLHIEIH 140
Query: 328 D--MVPEECLVQ 337
+ +V EC V+
Sbjct: 141 EGRIVSGECFVE 152
>gnl|CDD|240392 PTZ00381, PTZ00381, aldehyde dehydrogenase family protein;
Provisional.
Length = 493
Score = 29.2 bits (66), Expect = 4.0
Identities = 17/74 (22%), Positives = 27/74 (36%), Gaps = 11/74 (14%)
Query: 6 KHDFNATAEDELSFRKSQVLKILNMEDDM--NWYRA-ELDGKEGLIPSNYIEMKNHDWYY 62
K F L FRK Q+ +L M ++ + A D + E+
Sbjct: 17 KESFLTGKTRPLEFRKQQLRNLLRMLEENKQEFSEAVHKDLGRHPFETKMTEVL------ 70
Query: 63 GRITRADAERLLSN 76
+T A+ E LL +
Sbjct: 71 --LTVAEIEHLLKH 82
>gnl|CDD|212788 cd11854, SH3_Fus1p, Src homology 3 domain of yeast cell fusion
protein Fus1p. Fus1p is required at the cell surface
for cell fusion during the mating response in yeast. It
requires Bch1p and Bud7p, which are Chs5p-Arf1p binding
proteins, for localization to the plasma membrane. It
acts as a scaffold protein to assemble a cell surface
complex which is involved in septum degradation and
inhibition of the NOG pathway to promote cell fusion.
The SH3 domain of Fus1p interacts with Bin1p, a formin
that controls the assembly of actin cables in response
to Cdc42 signaling. It has been shown to bind the motif,
R(S/T)(S/T)SL, instead of PxxP motifs. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 56
Score = 26.5 bits (59), Expect = 4.4
Identities = 11/53 (20%), Positives = 19/53 (35%), Gaps = 4/53 (7%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWW----HGEIGARKGLFPAT 204
L+ + F P EL + G+ + V D W + +G+ P
Sbjct: 1 LMTVISTFEPSLDDELLIKVGETVRVLAEYDDGWCLVERADGLNGDRGMVPGE 53
>gnl|CDD|212955 cd12022, SH3_p47phox_2, Second or C-terminal Src homology 3 domain
of the p47phox subunit of NADPH oxidase, also called
Neutrophil Cytosolic Factor 1. p47phox, or NCF1, is a
cytosolic subunit of the phagocytic NADPH oxidase
complex (also called Nox2 or gp91phox), which plays a
key role in the ability of phagocytes to defend against
bacterial infections. NADPH oxidase catalyzes the
transfer of electrons from NADPH to oxygen during
phagocytosis forming superoxide and reactive oxygen
species. p47phox is required for activation of NADH
oxidase and plays a role in translocation. It contains
an N-terminal Phox homology (PX) domain, tandem SH3
domains (N-SH3 and C-SH3), a polybasic/autoinhibitory
region, and a C-terminal proline-rich region (PRR). This
model characterizes the second SH3 domain (or C-SH3) of
p47phox. In its inactive state, the tandem SH3 domains
interact intramolecularly with the autoinhibitory
region; upon activation, the tandem SH3 domains are
exposed through a conformational change, resulting in
their binding to the PRR of p22phox and the activation
of NADPH oxidase. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 26.3 bits (58), Expect = 4.7
Identities = 14/45 (31%), Positives = 19/45 (42%)
Query: 162 DFTPQEPGELEFRRGDVITVTDRSDQHWWHGEIGARKGLFPATYI 206
+T E EL G+ I V + WW G G FP+ Y+
Sbjct: 7 AYTAVEEDELTLLEGEAIEVIHKLLDGWWVVRKGEVTGYFPSMYL 51
>gnl|CDD|212951 cd12018, SH3_Tks4_4, Fourth (C-terminal) Src homology 3 domain of
Tyrosine kinase substrate with four SH3 domains. Tks4,
also called SH3 and PX domain-containing protein 2B
(SH3PXD2B) or HOFI, is a Src substrate and scaffolding
protein that plays an important role in the formation of
podosomes and invadopodia, the dynamic actin-rich
structures that are related to cell migration and cancer
cell invasion. It is required in the formation of
functional podosomes, EGF-induced membrane ruffling, and
lamellipodia generation. It plays an important role in
cellular attachment and cell spreading. Tks4 is
essential for the localization of MT1-MMP (membrane-type
1 matrix metalloproteinase) to invadopodia. It contains
an N-terminal Phox homology (PX) domain and four SH3
domains. This model characterizes the fourth
(C-terminal) SH3 domain of Tks4. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 26.4 bits (58), Expect = 5.1
Identities = 14/60 (23%), Positives = 21/60 (35%), Gaps = 22/60 (36%)
Query: 173 FRRGDVITVTDRSDQHWWHGEIGARKGLFPATYILNMEDDMNWYRAELDGKEGLIPSNYI 232
F+ G V V +++ WW + + W EG IPSNY+
Sbjct: 17 FKEGTVFEVREKNSSGWW--------------FCKVLSGGPVW--------EGWIPSNYL 54
>gnl|CDD|226093 COG3563, KpsC, Capsule polysaccharide export protein [Cell envelope
biogenesis, outer membrane].
Length = 671
Score = 29.0 bits (65), Expect = 5.3
Identities = 17/81 (20%), Positives = 28/81 (34%), Gaps = 11/81 (13%)
Query: 101 SDGVQHFKVLRDSSGKFFLWVVKFNSLNELVEYHRTASVSRSQDVKLR------DMVPEE 154
+ + ++ + W +L E E H + R +D LR ++ P
Sbjct: 350 NSTQKLARIKLKDDARILAWGNGKEALVEFAEQHHI-PLLRMEDGFLRSVGLGSNLTPPL 408
Query: 155 CLV---QALYDFTPQEPGELE 172
LV +Y F P LE
Sbjct: 409 SLVLDDMGIY-FDANTPSRLE 428
Score = 29.0 bits (65), Expect = 5.3
Identities = 17/81 (20%), Positives = 28/81 (34%), Gaps = 11/81 (13%)
Query: 280 SDGVQHFKVLRDSSGKFFLWVVKFNSLNELVEYHRTASVSRSQDVKLR------DMVPEE 333
+ + ++ + W +L E E H + R +D LR ++ P
Sbjct: 350 NSTQKLARIKLKDDARILAWGNGKEALVEFAEQHHI-PLLRMEDGFLRSVGLGSNLTPPL 408
Query: 334 CLV---QALYDFTPQEPGELE 351
LV +Y F P LE
Sbjct: 409 SLVLDDMGIY-FDANTPSRLE 428
>gnl|CDD|132287 TIGR03243, arg_catab_AOST, arginine and ornithine
succinyltransferase subunits. In many bacteria, the
sole member of this protein family is arginine
N-succinyltransferase (EC 2.3.1.109), the AstA protein
of the arginine succinyltransferase (ast) pathway.
However, in Pseudomonas aeruginosa and several other
species, a tandem gene pair encodes alpha and beta
subunits of a heterodimer that is designated arginine
and ornithine succinyltransferase (AOST).
Length = 335
Score = 28.8 bits (65), Expect = 5.6
Identities = 16/80 (20%), Positives = 34/80 (42%), Gaps = 8/80 (10%)
Query: 44 KEGLIPSNYIEMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDG 103
EG Y+++ + G A+ + + + + ++V ES+PGD + + C+
Sbjct: 239 SEGFRYQGYVDIFDA----GPTLEAEVDDIRAVRESRRVPVKVGESAPGDGTPYLVCNGR 294
Query: 104 VQHFKV----LRDSSGKFFL 119
+ F+ L +G L
Sbjct: 295 LADFRAVLAPLSADAGTLIL 314
Score = 28.8 bits (65), Expect = 5.6
Identities = 16/80 (20%), Positives = 34/80 (42%), Gaps = 8/80 (10%)
Query: 223 KEGLIPSNYIEMKNHDWYYGRITRADAERLLSNKHEGAFLIRVSESSPGDFSLSVKCSDG 282
EG Y+++ + G A+ + + + + ++V ES+PGD + + C+
Sbjct: 239 SEGFRYQGYVDIFDA----GPTLEAEVDDIRAVRESRRVPVKVGESAPGDGTPYLVCNGR 294
Query: 283 VQHFKV----LRDSSGKFFL 298
+ F+ L +G L
Sbjct: 295 LADFRAVLAPLSADAGTLIL 314
>gnl|CDD|213002 cd12069, SH3_ARHGAP27, Src Homology 3 domain of Rho
GTPase-activating protein 27. Rho GTPase-activating
proteins (RhoGAPs or ARHGAPs) bind to Rho proteins and
enhance the hydrolysis rates of bound GTP. ARHGAP27,
also called CAMGAP1, shows GAP activity towards Rac1 and
Cdc42. It binds the adaptor protein CIN85 and may play a
role in clathrin-mediated endocytosis. It contains SH3,
WW, Pleckstin homology (PH), and RhoGAP domains. SH3
domains bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs;
they play a role in the regulation of enzymes by
intramolecular interactions, changing the subcellular
localization of signal pathway components and mediate
multiprotein complex assemblies.
Length = 57
Score = 25.5 bits (56), Expect = 8.0
Identities = 13/53 (24%), Positives = 28/53 (52%), Gaps = 2/53 (3%)
Query: 156 LVQALYDFTPQEPGELEFRRGDVITVTDRSDQHWWH--GEIGARKGLFPATYI 206
LV+ +++T ++ + + + + R+++HWWH + G R PA Y+
Sbjct: 3 LVEHAFEYTGKDGRLVSIKPNERYILLRRTNEHWWHVRRDKGTRPFYIPAKYV 55
>gnl|CDD|215126 PLN02204, PLN02204, diacylglycerol kinase.
Length = 601
Score = 27.9 bits (62), Expect = 9.6
Identities = 16/57 (28%), Positives = 26/57 (45%), Gaps = 7/57 (12%)
Query: 87 SESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFLW-VVKF-----NSLN-ELVEYHRT 136
+E +P SDG H +++D +LW + + LN E VE+H+T
Sbjct: 501 NERAPDGLVADAHLSDGFLHLILIKDCPHPLYLWHLTQLAKRGGEPLNFEFVEHHKT 557
Score = 27.9 bits (62), Expect = 9.6
Identities = 16/57 (28%), Positives = 26/57 (45%), Gaps = 7/57 (12%)
Query: 266 SESSPGDFSLSVKCSDGVQHFKVLRDSSGKFFLW-VVKF-----NSLN-ELVEYHRT 315
+E +P SDG H +++D +LW + + LN E VE+H+T
Sbjct: 501 NERAPDGLVADAHLSDGFLHLILIKDCPHPLYLWHLTQLAKRGGEPLNFEFVEHHKT 557
>gnl|CDD|224714 COG1801, COG1801, Uncharacterized conserved protein [Function
unknown].
Length = 263
Score = 27.7 bits (62), Expect = 9.7
Identities = 12/35 (34%), Positives = 18/35 (51%), Gaps = 3/35 (8%)
Query: 88 ESSPGDFSLSVKCSDGVQHFKVLRD---SSGKFFL 119
E +P DF SVK + H + L++ +FFL
Sbjct: 60 EETPDDFRFSVKAPRAITHQRRLKECDFELWEFFL 94
Score = 27.7 bits (62), Expect = 9.7
Identities = 12/35 (34%), Positives = 18/35 (51%), Gaps = 3/35 (8%)
Query: 267 ESSPGDFSLSVKCSDGVQHFKVLRD---SSGKFFL 298
E +P DF SVK + H + L++ +FFL
Sbjct: 60 EETPDDFRFSVKAPRAITHQRRLKECDFELWEFFL 94
Database: CDD.v3.10
Posted date: Mar 20, 2013 7:55 AM
Number of letters in database: 10,937,602
Number of sequences in database: 44,354
Lambda K H
0.318 0.134 0.402
Gapped
Lambda K H
0.267 0.0813 0.140
Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 44354
Number of Hits to DB: 19,053,325
Number of extensions: 1824817
Number of successful extensions: 2957
Number of sequences better than 10.0: 1
Number of HSP's gapped: 2589
Number of HSP's successfully gapped: 794
Length of query: 376
Length of database: 10,937,602
Length adjustment: 98
Effective length of query: 278
Effective length of database: 6,590,910
Effective search space: 1832272980
Effective search space used: 1832272980
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.3 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.7 bits)
S2: 60 (26.7 bits)