RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy5076
(288 letters)
>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 = 161 bits (410), Expect = 1e-50
Identities = 62/105 (59%), Positives = 81/105 (77%), Gaps = 2/105 (1%)
Query: 5 FDPHDRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIIN 64
FD DR+SWYFG M+RQEAQ +L ++ G FLVRDS+TI G+YVL V EN++VSHYIIN
Sbjct: 1 FDSSDRSSWYFGPMSRQEAQELLQGQRH-GVFLVRDSSTIPGDYVLSVSENSRVSHYIIN 59
Query: 65 KIT-NTEQQTCYKIGDKTFSDLPSLLAFYKVHYLDTSPLIKPATK 108
+ Q+ Y+IGD+ F DLP+LL FYK+HYLDT+ LI+PA++
Sbjct: 60 SLGQPAPNQSRYRIGDQEFDDLPALLEFYKLHYLDTTTLIEPASR 104
>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 = 120 bits (303), Expect = 3e-35
Identities = 45/57 (78%), Positives = 51/57 (89%)
Query: 205 PAFARVKQVRVPNAYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVEF 261
PA+ARV Q RVPNAYDKTAL LE+GD++KVTK N++GQWEGELNGK GHFPFTHVE
Sbjct: 1 PAYARVIQKRVPNAYDKTALALEVGDLVKVTKINVSGQWEGELNGKVGHFPFTHVEL 57
>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 = 104 bits (262), Expect = 5e-29
Identities = 33/55 (60%), Positives = 40/55 (72%)
Query: 111 EKVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
E V A +DF GND +DLPFKK +IL V+ K EE WW A+N G+ G IPVPYV+K
Sbjct: 1 EYVRALFDFPGNDDEDLPFKKGEILTVIRKPEEQWWNARNSEGKTGMIPVPYVEK 55
>gnl|CDD|215658 pfam00017, SH2, SH2 domain.
Length = 77
Score = 86.5 bits (215), Expect = 8e-22
Identities = 31/80 (38%), Positives = 48/80 (60%), Gaps = 3/80 (3%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
WY G ++R+EA+ +LL+ K +G FLVR+S + G+Y L V+++ +V HY I +
Sbjct: 1 WYHGKISREEAERLLLNPKPDGTFLVRESESKPGDYTLSVRDDGRVKHYRIQS---LDNG 57
Query: 73 TCYKIGDKTFSDLPSLLAFY 92
Y G TF+ LP L+ Y
Sbjct: 58 GYYISGGVTFNSLPELVEHY 77
>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 = 84.6 bits (210), Expect = 5e-21
Identities = 34/85 (40%), Positives = 48/85 (56%), Gaps = 4/85 (4%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
WY G ++R+EA+ +L +E D G FLVRDS + G+YVL V+ KV HY I + E
Sbjct: 3 WYHGFISREEAEKLLKNEGD-GDFLVRDSESSPGDYVLSVRVKGKVKHYRIRR---NEDG 58
Query: 73 TCYKIGDKTFSDLPSLLAFYKVHYL 97
Y G + F L L+ Y+ + L
Sbjct: 59 KFYLEGGRKFPSLVELVEHYQKNSL 83
>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 = 84.4 bits (209), Expect = 6e-21
Identities = 30/82 (36%), Positives = 47/82 (57%), Gaps = 4/82 (4%)
Query: 12 SWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVK-ENNKVSHYIINKITNTE 70
W+ G ++R+EA+ +L + D G FLVR+S++ G+YVL V+ + KV HY+I + N
Sbjct: 1 PWFHGSISREEAERLLRGKPD-GTFLVRESSSEPGDYVLSVRSGDGKVKHYLIER--NEG 57
Query: 71 QQTCYKIGDKTFSDLPSLLAFY 92
+TF LP L+ Y
Sbjct: 58 GYYLLGGSGRTFPSLPELVEHY 79
>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 = 80.3 bits (199), Expect = 9e-20
Identities = 22/55 (40%), Positives = 32/55 (58%)
Query: 110 IEKVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+V A YD+ DPD+L FKK DI+ V+ K ++ WW + G+ G P YV+
Sbjct: 2 GPQVRALYDYTAQDPDELSFKKGDIITVLEKSDDGWWKGRLGRGKEGLFPSNYVE 56
Score = 43.3 bits (103), Expect = 3e-06
Identities = 19/45 (42%), Positives = 25/45 (55%), Gaps = 1/45 (2%)
Query: 217 NAYDKTALKLEIGDIIKVTKTNINGQWEGELN-GKTGHFPFTHVE 260
A D L + GDII V + + +G W+G L GK G FP +VE
Sbjct: 12 TAQDPDELSFKKGDIITVLEKSDDGWWKGRLGRGKEGLFPSNYVE 56
>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 = 73.0 bits (180), Expect = 4e-17
Identities = 20/47 (42%), Positives = 30/47 (63%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPV 160
+A YD+ +PD+L FKK DI+IV+ K ++ WW + G+ G IP
Sbjct: 1 VALYDYTAREPDELSFKKGDIIIVLEKSDDGWWKGRLKGGKEGLIPS 47
Score = 29.5 bits (67), Expect = 0.22
Identities = 18/43 (41%), Positives = 23/43 (53%), Gaps = 6/43 (13%)
Query: 219 YDKTA-----LKLEIGDIIKVTKTNINGQWEGEL-NGKTGHFP 255
YD TA L + GDII V + + +G W+G L GK G P
Sbjct: 4 YDYTAREPDELSFKKGDIIIVLEKSDDGWWKGRLKGGKEGLIP 46
>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 = 71.7 bits (177), Expect = 1e-16
Identities = 20/51 (39%), Positives = 28/51 (54%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPY 162
A YD++ D D+L FKK DI+ V+ KD++ WW + G G P Y
Sbjct: 1 YARALYDYEAQDDDELSFKKGDIITVLEKDDDGWWEGELNGGREGLFPANY 51
Score = 40.9 bits (97), Expect = 2e-05
Identities = 17/36 (47%), Positives = 23/36 (63%), Gaps = 1/36 (2%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELN-GKTGHFPFTH 258
L + GDII V + + +G WEGELN G+ G FP +
Sbjct: 16 LSFKKGDIITVLEKDDDGWWEGELNGGREGLFPANY 51
>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 = 71.2 bits (175), Expect = 3e-16
Identities = 29/56 (51%), Positives = 38/56 (67%), Gaps = 3/56 (5%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVV--SKDEEHWWTAQNISGEVGSIPVPYVQK 165
+ IAKY+F+G +DLPFKK DIL +V +KD +W+ A+N G G IP YVQK
Sbjct: 3 ECIAKYNFNGASEEDLPFKKGDILTIVAVTKD-PNWYKAKNKDGREGMIPANYVQK 57
>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 = 70.0 bits (172), Expect = 6e-16
Identities = 22/54 (40%), Positives = 32/54 (59%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
V+A YDF +P DLP +K + +V+ EHWW A++ +G G IP YV +
Sbjct: 1 IVVALYDFQPIEPGDLPLEKGEEYVVLDDSNEHWWRARDKNGNEGYIPSNYVTE 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 = 68.9 bits (169), Expect = 1e-14
Identities = 28/84 (33%), Positives = 46/84 (54%), Gaps = 7/84 (8%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
WY G + RQ A++++ E D FLVRDS + G+YVL + + H+ IN++ +
Sbjct: 8 WYHGRIPRQVAESLVQREGD---FLVRDSLSSPGDYVLTCRWKGQPLHFKINRVVLRPSE 64
Query: 73 TC----YKIGDKTFSDLPSLLAFY 92
Y+ D+ F +P+L+ FY
Sbjct: 65 AYTRVQYQFEDEQFDSIPALVHFY 88
>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 = 65.4 bits (159), Expect = 7e-14
Identities = 32/81 (39%), Positives = 44/81 (54%), Gaps = 4/81 (4%)
Query: 13 WYFGMMTRQEAQAILLSEKDN-GAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQ 71
WYF ++R +AQ +LLS + GAFL+R S + LG Y L V+ KV HY +I
Sbjct: 2 WYFSGISRTQAQQLLLSPPNEPGAFLIRPSESSLGGYSLSVRAQAKVCHY---RICMAPS 58
Query: 72 QTCYKIGDKTFSDLPSLLAFY 92
+ Y + F L LLA+Y
Sbjct: 59 GSLYLQKGRLFPGLEELLAYY 79
>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 = 64.7 bits (158), Expect = 1e-13
Identities = 28/82 (34%), Positives = 43/82 (52%), Gaps = 3/82 (3%)
Query: 12 SWYFGMMTRQEAQAILL-SEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTE 70
WY G ++R+ A+A+LL +G FLVR+S + G+YVL + +V HY I + + E
Sbjct: 2 RWYHGKISREVAEALLLREGGRDGLFLVRESTSAPGDYVLSLLAQGEVLHYQIRR--HGE 59
Query: 71 QQTCYKIGDKTFSDLPSLLAFY 92
G F L +L+ Y
Sbjct: 60 DAFFSDDGPLIFHGLDTLIEHY 81
>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 = 64.5 bits (158), Expect = 2e-13
Identities = 27/89 (30%), Positives = 43/89 (48%), Gaps = 9/89 (10%)
Query: 13 WYFGMMTRQEAQAILLSEKDN-GAFLVRDSNTILGNYVLCVKENNK-----VSHYIINKI 66
W+FG + R++A+ +LL+ + G FL+R+S T G Y L V++ + V HY +I
Sbjct: 5 WFFGKIKRKDAEKLLLAPGNPRGTFLIRESETTPGAYSLSVRDGDDARGDTVKHY---RI 61
Query: 67 TNTEQQTCYKIGDKTFSDLPSLLAFYKVH 95
+ Y TF L L+ Y
Sbjct: 62 RKLDNGGYYITTRATFPTLQELVQHYSKD 90
>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 = 61.3 bits (150), Expect = 8e-13
Identities = 19/44 (43%), Positives = 26/44 (59%)
Query: 217 NAYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
A D L L+ GD++KV + NG WEGE G+ G P ++VE
Sbjct: 9 VATDPNELSLKKGDVVKVLDKDDNGWWEGERGGRRGLVPSSYVE 52
Score = 42.8 bits (102), Expect = 4e-06
Identities = 17/54 (31%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
+D+ DP++L KK D++ V+ KD+ WW + G G +P YV++
Sbjct: 1 YGRVIFDYVATDPNELSLKKGDVVKVLDKDDNGWWEGER-GGRRGLVPSSYVEE 53
>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 = 62.3 bits (152), Expect = 1e-12
Identities = 25/97 (25%), Positives = 52/97 (53%), Gaps = 4/97 (4%)
Query: 11 NSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTE 70
+ W+ G ++R EA+ IL++++ +GAFL+R+S + G++ L VK N V H+ + + +
Sbjct: 3 HPWFHGKISRAEAEEILMNQRPDGAFLIRESESSPGDFSLSVKFGNDVQHFKVLR----D 58
Query: 71 QQTCYKIGDKTFSDLPSLLAFYKVHYLDTSPLIKPAT 107
Y + F+ L L+ +++ + + I
Sbjct: 59 GAGKYFLWVVKFNSLNELVDYHRTTSVSRNQQIFLRD 95
>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 = 61.9 bits (151), Expect = 2e-12
Identities = 27/83 (32%), Positives = 48/83 (57%), Gaps = 7/83 (8%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENN-KVSHYIINKITNTEQ 71
W+ G ++ +EA+ +LL + G+FLVR+S + G++VL V+ ++ KV+H +I +
Sbjct: 2 WFHGHLSGKEAEKLLLEKGKPGSFLVRESQSKPGDFVLSVRTDDDKVTHIMIR--CQGGK 59
Query: 72 QTCYKIGD-KTFSDLPSLLAFYK 93
Y +G + F L L+ YK
Sbjct: 60 ---YDVGGGEEFDSLTDLVEHYK 79
>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 = 60.0 bits (146), Expect = 3e-12
Identities = 19/53 (35%), Positives = 28/53 (52%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
A DF DL FKK ++L ++SK + WW A+N G G +P Y++
Sbjct: 2 YEALSDFQAEQEGDLSFKKGEVLRIISKRADGWWLAENSKGNRGLVPKTYLKV 54
>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 = 61.4 bits (149), Expect = 3e-12
Identities = 27/91 (29%), Positives = 44/91 (48%), Gaps = 5/91 (5%)
Query: 11 NSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTE 70
WY+G +TR +A+ +L G FL+RDS + G+Y + +K + H+ K+
Sbjct: 1 QPWYYGRITRHQAETLLNEHGHEGDFLIRDSESNPGDYSVSLKAPGRNKHF---KVQV-- 55
Query: 71 QQTCYKIGDKTFSDLPSLLAFYKVHYLDTSP 101
Y IG + F + L+ YK + TS
Sbjct: 56 VDNVYCIGQRKFHTMDELVEHYKKAPIFTSE 86
>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 = 59.2 bits (144), Expect = 7e-12
Identities = 20/55 (36%), Positives = 32/55 (58%), Gaps = 2/55 (3%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSK--DEEHWWTAQNISGEVGSIPVPYVQ 164
V+A Y F G + ++L F+K + L ++ K D+ WW A+N G G +P YV+
Sbjct: 1 VVVALYPFTGENDEELSFEKGERLEIIEKPEDDPDWWKARNALGTTGLVPRNYVE 55
>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 = 60.4 bits (147), Expect = 7e-12
Identities = 29/85 (34%), Positives = 44/85 (51%), Gaps = 13/85 (15%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYII----NKITN 68
W+ G ++R+EA+ LL ++G FLVR+S G+Y LCV KV HY + K+T
Sbjct: 5 WFHGKISREEAER-LLQPPEDGLFLVRESTNYPGDYTLCVSFEGKVEHYRVIYRNGKLTI 63
Query: 69 TEQQTCYKIGDKTFSDLPSLLAFYK 93
E++ F +L L+ Y
Sbjct: 64 DEEE--------YFENLIQLVEHYT 80
>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 = 58.2 bits (141), Expect = 3e-11
Identities = 25/80 (31%), Positives = 43/80 (53%), Gaps = 4/80 (5%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
W+ G ++R+EA +L+ G+FLVR+S+ G+Y L + N + H+ KI T
Sbjct: 2 WFHGKISREEAYNMLVKVGGPGSFLVRESDNTPGDYSLSFRVNEGIKHF---KIIPTGNN 58
Query: 73 TCYKIGDKTFSDLPSLLAFY 92
+ +G + FS L ++ Y
Sbjct: 59 Q-FMMGGRYFSSLDDVIDRY 77
>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 = 58.3 bits (141), Expect = 4e-11
Identities = 30/84 (35%), Positives = 46/84 (54%), Gaps = 6/84 (7%)
Query: 13 WYFGMMTRQEAQ-AILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQ 71
WYFG + R EA+ +LL E ++GAFL+RDS + +Y L V++ + V HY I ++
Sbjct: 5 WYFGKIKRIEAEKKLLLPENEHGAFLIRDSESRHNDYSLSVRDGDTVKHYRIRQLDEGG- 63
Query: 72 QTCYKIGDK-TFSDLPSLLAFYKV 94
+ I + TF L L+ Y
Sbjct: 64 ---FFIARRTTFRTLQELVEHYSK 84
>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 = 57.9 bits (140), Expect = 4e-11
Identities = 30/92 (32%), Positives = 47/92 (51%), Gaps = 10/92 (10%)
Query: 12 SWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQ 71
WY G +TR A+A+LLS +G++L+R+SN G + L V+ + V H+ +
Sbjct: 7 GWYHGNLTRHAAEALLLSNGVDGSYLLRNSNEGTGLFSLSVRAKDSVKHFHV-----EYT 61
Query: 72 QTCYKIGDKTFSDLPSLLAFYKVHYLDTSPLI 103
+K G F++ SL F V + PLI
Sbjct: 62 GYSFKFG---FNEFSSLQDF--VKHFANQPLI 88
>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 = 57.0 bits (138), Expect = 1e-10
Identities = 31/91 (34%), Positives = 47/91 (51%), Gaps = 6/91 (6%)
Query: 8 HDRNSWYFGMMTRQEAQAIL--LSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINK 65
H W+ G ++R EA ++ D G FLVR+S + G +VL +K K+ HY I
Sbjct: 2 HRSQPWFHGGISRDEAARLIRQQGLVD-GVFLVRESQSNPGAFVLSLKHGQKIKHYQIIP 60
Query: 66 ITNTEQQTCYKI--GDKTFSDLPSLLAFYKV 94
I + E Q + + G F DL L+ FY++
Sbjct: 61 IED-EGQWYFTLDDGVTKFYDLLQLVEFYQL 90
>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 = 56.6 bits (136), Expect = 2e-10
Identities = 35/89 (39%), Positives = 48/89 (53%), Gaps = 9/89 (10%)
Query: 13 WYFGMMTRQEAQAILLS-EKDNGAFLVRDSNTILGNYVLCVK--ENNK---VSHYIINKI 66
WYFG +TR+E++ +LL+ E G FLVR+S T G Y L V +N K V HY I K+
Sbjct: 5 WYFGKITRRESERLLLNAENPRGTFLVRESETTKGAYCLSVSDFDNAKGLNVKHYKIRKL 64
Query: 67 TNTEQQTCYKIGDKTFSDLPSLLAFYKVH 95
+ Y F+ L L+A+Y H
Sbjct: 65 ---DSGGFYITSRTQFNSLQQLVAYYSKH 90
>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 = 54.6 bits (132), Expect = 2e-10
Identities = 18/50 (36%), Positives = 28/50 (56%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A YDF +P+ L F + + +++ + HWW N SGE G +P YV+
Sbjct: 4 ALYDFKSAEPNTLSFSEGETFLLLERSNAHWWLVTNHSGETGYVPANYVK 53
>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 = 55.9 bits (135), Expect = 2e-10
Identities = 26/87 (29%), Positives = 47/87 (54%), Gaps = 4/87 (4%)
Query: 9 DRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITN 68
+++SWY G ++R A+ LLS NG+FLVR+S + G Y + ++ + +V HY I++
Sbjct: 1 EKHSWYHGPISRNAAE-YLLSSGINGSFLVRESESSPGQYSISLRYDGRVYHYRISE--- 56
Query: 69 TEQQTCYKIGDKTFSDLPSLLAFYKVH 95
Y + F+ L L+ + +
Sbjct: 57 DSDGKVYVTQEHRFNTLAELVHHHSKN 83
>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 = 56.0 bits (136), Expect = 2e-10
Identities = 24/93 (25%), Positives = 48/93 (51%), Gaps = 10/93 (10%)
Query: 6 DPHDRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDS---NTILGNYVLCVKENNKVSHYI 62
+ +Y G++ R++A+ +L K++G FLVR + VL V+ + K+ H++
Sbjct: 1 KDLENEPYYHGLLPREDAEELL---KNDGDFLVRKTEPKGGGKRKLVLSVRWDGKIRHFV 57
Query: 63 INKITNTEQQTCYKIGDKTFSDLPSLLAFYKVH 95
IN+ + + Y I K+F + L+ +Y+
Sbjct: 58 INR-DDGGK---YYIEGKSFKSISELINYYQKT 86
>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 = 54.2 bits (131), Expect = 3e-10
Identities = 20/54 (37%), Positives = 31/54 (57%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
+V A YDF+ +P +L F++ DI+ V+ + WW + + G VG P YVQ
Sbjct: 1 RVQALYDFNPQEPGELEFRRGDIITVLDSSDPDWWKGE-LRGRVGIFPANYVQP 53
Score = 40.3 bits (95), Expect = 3e-05
Identities = 14/32 (43%), Positives = 20/32 (62%)
Query: 229 GDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
GDII V ++ W+GEL G+ G FP +V+
Sbjct: 21 GDIITVLDSSDPDWWKGELRGRVGIFPANYVQ 52
>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 = 55.9 bits (135), Expect = 3e-10
Identities = 32/86 (37%), Positives = 46/86 (53%), Gaps = 6/86 (6%)
Query: 12 SWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQ 71
WY G +TR +A+ +L +G+FLVRDS ++ G Y LCV N V Y I + N E
Sbjct: 4 PWYHGNITRSKAEELLSKAGKDGSFLVRDSESVSGAYALCVLYQNCVHTYRI--LPNAED 61
Query: 72 ----QTCYKIGDKTFSDLPSLLAFYK 93
Q + + F+ LP L+ FY+
Sbjct: 62 KLSVQASEGVPVRFFTTLPELIEFYQ 87
>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 = 53.2 bits (128), Expect = 8e-10
Identities = 20/53 (37%), Positives = 34/53 (64%), Gaps = 1/53 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+VIA + + + D+L F+K DI+ V+SKD+ WW + ++G+ G P YV+
Sbjct: 1 QVIALFPYTAQNEDELSFQKGDIINVLSKDDPDWWRGE-LNGQTGLFPSNYVE 52
Score = 35.1 bits (81), Expect = 0.003
Identities = 19/44 (43%), Positives = 25/44 (56%)
Query: 217 NAYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
A ++ L + GDII V + W GELNG+TG FP +VE
Sbjct: 9 TAQNEDELSFQKGDIINVLSKDDPDWWRGELNGQTGLFPSNYVE 52
>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 = 53.0 bits (128), Expect = 9e-10
Identities = 20/51 (39%), Positives = 30/51 (58%), Gaps = 1/51 (1%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNIS-GEVGSIPVPY 162
+A YD++ DDL FKK D L ++ + WW A+++S G+ G IP Y
Sbjct: 2 YVALYDYEARTDDDLSFKKGDRLQILDDSDGDWWLARHLSTGKEGYIPSNY 52
>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 = 54.3 bits (131), Expect = 1e-09
Identities = 30/97 (30%), Positives = 46/97 (47%), Gaps = 4/97 (4%)
Query: 8 HDRNSWYFGMMT--RQEAQAILLS--EKDNGAFLVRDSNTILGNYVLCVKENNKVSHYII 63
H W+ G + R EA+ +LL E +G FLVR+S T +G+Y L N KV H I
Sbjct: 1 HFTEPWFHGKLGDGRDEAEKLLLEYCEGGDGTFLVRESETFVGDYTLSFWRNGKVQHCRI 60
Query: 64 NKITNTEQQTCYKIGDKTFSDLPSLLAFYKVHYLDTS 100
++ Y + F L L+ +Y+ + L +
Sbjct: 61 RSRQENGEKKYYLTDNLVFDSLYELIDYYRQNPLRCA 97
>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 = 53.9 bits (130), Expect = 1e-09
Identities = 25/80 (31%), Positives = 45/80 (56%), Gaps = 4/80 (5%)
Query: 11 NSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTE 70
Y G+++R+EA LLS +G++L+R+S+ G Y L ++ N KV +Y K+
Sbjct: 6 GREYHGLISREEA-EQLLSGASDGSYLIRESSRDDGYYTLSLRFNGKVKNY---KLYYDG 61
Query: 71 QQTCYKIGDKTFSDLPSLLA 90
+ + +G+K F + L+A
Sbjct: 62 KNHYHYVGEKRFDTIHDLVA 81
>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 = 51.4 bits (123), Expect = 5e-09
Identities = 20/53 (37%), Positives = 32/53 (60%)
Query: 111 EKVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
E V+A YDF +P DL + + +++ K++ HWW A++ G+ G IP YV
Sbjct: 1 EIVVAMYDFQPTEPHDLRLETGEEYVILEKNDVHWWKARDKYGKEGYIPSNYV 53
>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 = 50.9 bits (122), Expect = 6e-09
Identities = 23/55 (41%), Positives = 31/55 (56%), Gaps = 3/55 (5%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEH--WWTAQNISGEVGSIPVPYVQ 164
K +A YDF G P DL F+K DI+ ++ K + WWT + I G G P YV+
Sbjct: 1 KAVALYDFAGEQPGDLAFQKGDIITILKKSDSQNDWWTGR-IGGREGIFPANYVE 54
Score = 34.7 bits (80), Expect = 0.004
Identities = 15/39 (38%), Positives = 21/39 (53%), Gaps = 2/39 (5%)
Query: 224 LKLEIGDIIKVTK--TNINGQWEGELNGKTGHFPFTHVE 260
L + GDII + K + N W G + G+ G FP +VE
Sbjct: 16 LAFQKGDIITILKKSDSQNDWWTGRIGGREGIFPANYVE 54
>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 = 52.3 bits (126), Expect = 6e-09
Identities = 26/90 (28%), Positives = 47/90 (52%), Gaps = 5/90 (5%)
Query: 8 HDRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKIT 67
H+ W+ +TR++A+ +L+ +GAFLVR S T ++ + + K+ H I +
Sbjct: 1 HESKEWFHANLTREQAEEMLMRVPRDGAFLVRPSETDPNSFAISFRAEGKIKHCRIKQ-- 58
Query: 68 NTEQQTCYKIGDKTFSDLPSLLAFYKVHYL 97
E + + IG F L L+++Y+ H L
Sbjct: 59 --EGRL-FVIGTSQFESLVELVSYYEKHPL 85
>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 = 50.4 bits (121), Expect = 1e-08
Identities = 18/53 (33%), Positives = 32/53 (60%), Gaps = 1/53 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+ AKY+F+ + +L F+K D++ + + +E+W+ + I G G PV YVQ
Sbjct: 1 EARAKYNFNADTGVELSFRKGDVITLTRRVDENWYEGR-IGGRQGIFPVSYVQ 52
Score = 29.6 bits (67), Expect = 0.25
Identities = 15/45 (33%), Positives = 25/45 (55%), Gaps = 2/45 (4%)
Query: 217 NAYDKTALKLEIGDIIKVTKTNINGQW-EGELNGKTGHFPFTHVE 260
NA L GD+I +T+ ++ W EG + G+ G FP ++V+
Sbjct: 9 NADTGVELSFRKGDVITLTR-RVDENWYEGRIGGRQGIFPVSYVQ 52
>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 = 50.2 bits (120), Expect = 1e-08
Identities = 22/52 (42%), Positives = 30/52 (57%), Gaps = 1/52 (1%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
V A+YDF DP L F++ DI+ V+ + +WW + ISG VG P YV
Sbjct: 2 VQAQYDFSAEDPSQLSFRRGDIIEVLDCPDPNWWRGR-ISGRVGFFPRNYVH 52
Score = 30.9 bits (70), Expect = 0.069
Identities = 15/42 (35%), Positives = 21/42 (50%)
Query: 218 AYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHV 259
A D + L GDII+V W G ++G+ G FP +V
Sbjct: 10 AEDPSQLSFRRGDIIEVLDCPDPNWWRGRISGRVGFFPRNYV 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 = 1e-08
Identities = 18/53 (33%), Positives = 34/53 (64%), Gaps = 1/53 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+V+A + ++ + P+DL F+K D+++V+SK E W Q G++G P +V+
Sbjct: 1 QVVALFSYEASQPEDLEFQKGDVILVLSKVNEDWLEGQ-CKGKIGIFPSAFVE 52
Score = 32.1 bits (73), Expect = 0.029
Identities = 16/38 (42%), Positives = 22/38 (57%), Gaps = 2/38 (5%)
Query: 224 LKLEIGDIIKVTKTNINGQW-EGELNGKTGHFPFTHVE 260
L+ + GD+I V + +N W EG+ GK G FP VE
Sbjct: 16 LEFQKGDVILVL-SKVNEDWLEGQCKGKIGIFPSAFVE 52
>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 = 50.1 bits (120), Expect = 1e-08
Identities = 18/51 (35%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEV-GSIPVPYVQ 164
A YDF G+ ++L KK+DI+ +V K++ WW A+ + G +P Y++
Sbjct: 4 ALYDFAGSVANELSLKKDDIVYIVQKEDNGWWLAKKLDESKEGWVPAAYLE 54
>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 = 51.0 bits (122), Expect = 2e-08
Identities = 28/81 (34%), Positives = 44/81 (54%), Gaps = 4/81 (4%)
Query: 13 WYFGMMTRQEAQAILL-SEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQ 71
W+FG + R +A+ LL SE GAFL+R+S + G + L V + V HY I ++ ++
Sbjct: 5 WFFGAIKRADAEKQLLYSENQTGAFLIRESESQKGEFSLSVLDGGVVKHYRIRRL---DE 61
Query: 72 QTCYKIGDKTFSDLPSLLAFY 92
+ KTFS L + +Y
Sbjct: 62 GGFFLTRRKTFSTLNEFVNYY 82
>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 = 51.1 bits (123), Expect = 2e-08
Identities = 24/86 (27%), Positives = 36/86 (41%), Gaps = 6/86 (6%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
W+ G M R A+ L + D G +LVR Y L +K N V H I +
Sbjct: 7 WFVGEMERDTAENRLENRPD-GTYLVRVRPQGETQYALSIKYNGDVKHMKIEQ----RSD 61
Query: 73 TCYKIGDKT-FSDLPSLLAFYKVHYL 97
Y + + F L L+ +Y+ + L
Sbjct: 62 GLYYLSESRHFKSLVELVNYYERNSL 87
>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 = 49.6 bits (118), Expect = 2e-08
Identities = 22/44 (50%), Positives = 29/44 (65%), Gaps = 1/44 (2%)
Query: 218 AYDKTALKLEIGDIIKV-TKTNINGQWEGELNGKTGHFPFTHVE 260
A D L L GD++K+ TK + NG W GE+NG+ G FP T+VE
Sbjct: 11 ARDMRELSLLKGDVVKIYTKMSTNGWWRGEVNGRVGWFPSTYVE 54
Score = 37.3 bits (86), Expect = 4e-04
Identities = 17/52 (32%), Positives = 28/52 (53%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
IA+YDF D +L K D++ + +K + W ++G VG P YV++
Sbjct: 4 IARYDFCARDMRELSLLKGDVVKIYTKMSTNGWWRGEVNGRVGWFPSTYVEE 55
>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 = 50.8 bits (122), Expect = 2e-08
Identities = 20/58 (34%), Positives = 34/58 (58%), Gaps = 3/58 (5%)
Query: 6 DPHDRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYII 63
+ WY G M+R++A+++L + +G FLVR+S T G YVL +N + H ++
Sbjct: 2 EQLRGEPWYHGKMSRRDAESLL---QTDGDFLVRESTTTPGQYVLTGMQNGQPKHLLL 56
>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 = 49.0 bits (117), Expect = 2e-08
Identities = 19/51 (37%), Positives = 30/51 (58%), Gaps = 1/51 (1%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
A Y +D D D+L F + DI+ ++ +D WWT + + G+ G P YV+K
Sbjct: 4 ALYAYDAQDTDELSFNEGDIIEILKEDPSGWWTGR-LRGKEGLFPGNYVEK 53
Score = 40.5 bits (95), Expect = 3e-05
Identities = 19/43 (44%), Positives = 24/43 (55%)
Query: 218 AYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
A D L GDII++ K + +G W G L GK G FP +VE
Sbjct: 10 AQDTDELSFNEGDIIEILKEDPSGWWTGRLRGKEGLFPGNYVE 52
>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 = 49.6 bits (118), Expect = 4e-08
Identities = 25/83 (30%), Positives = 43/83 (51%), Gaps = 5/83 (6%)
Query: 11 NSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTE 70
N WY+G +TR +A+ L + G FL+RDS + ++ + +K K H+ +
Sbjct: 1 NPWYYGKVTRHQAEMALNERGNEGDFLIRDSESSPNDFSVSLKAQGKNKHFKVQL----- 55
Query: 71 QQTCYKIGDKTFSDLPSLLAFYK 93
++ Y IG + FS + L+ YK
Sbjct: 56 KECVYCIGQRKFSSMEELVEHYK 78
>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 = 49.7 bits (119), Expect = 5e-08
Identities = 23/57 (40%), Positives = 33/57 (57%), Gaps = 1/57 (1%)
Query: 13 WYFGMMTRQEAQAIL-LSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITN 68
+++G +TR+EA+ L L+ +G FL+R S LG YVL V K HY I + N
Sbjct: 3 FFYGSITREEAEEYLKLAGMSDGLFLLRQSLRSLGGYVLSVCHGRKFHHYTIERQLN 59
>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 = 50.4 bits (121), Expect = 5e-08
Identities = 24/65 (36%), Positives = 33/65 (50%), Gaps = 2/65 (3%)
Query: 9 DRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGN--YVLCVKENNKVSHYIINKI 66
WY G + R+EA+ L +G FLVRDS+ + Y L V N+KV + I +
Sbjct: 9 LPKEWYAGNIDRKEAEEALRRSNKDGTFLVRDSSGKDSSQPYTLMVLYNDKVYNIQIRFL 68
Query: 67 TNTEQ 71
NT Q
Sbjct: 69 ENTRQ 73
>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 = 48.3 bits (115), Expect = 5e-08
Identities = 23/53 (43%), Positives = 32/53 (60%)
Query: 208 ARVKQVRVPNAYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
ARV +P+ YD +LKL+ GDII++ + G W G LN K G F F +V+
Sbjct: 3 ARVHTDFIPSPYDGDSLKLQKGDIIQIIEKPPVGTWTGLLNNKVGTFKFIYVD 55
Score = 26.4 bits (58), Expect = 3.7
Identities = 13/41 (31%), Positives = 21/41 (51%), Gaps = 1/41 (2%)
Query: 123 DPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
D D L +K DI+ ++ K WT ++ +VG+ YV
Sbjct: 15 DGDSLKLQKGDIIQIIEKPPVGTWTGL-LNNKVGTFKFIYV 54
>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 = 48.3 bits (115), Expect = 6e-08
Identities = 19/50 (38%), Positives = 33/50 (66%), Gaps = 1/50 (2%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A DF+ +D D+L F+KNDI+ ++S+ +EH W + ++G G P +V+
Sbjct: 4 ALLDFERHDDDELGFRKNDIITIISQKDEHCWVGE-LNGLRGWFPAKFVE 52
Score = 29.4 bits (66), Expect = 0.28
Identities = 16/42 (38%), Positives = 18/42 (42%)
Query: 219 YDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
+D L DII + W GELNG G FP VE
Sbjct: 11 HDDDELGFRKNDIITIISQKDEHCWVGELNGLRGWFPAKFVE 52
>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 = 49.1 bits (117), Expect = 7e-08
Identities = 26/83 (31%), Positives = 47/83 (56%), Gaps = 8/83 (9%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
W+ G +TR++ + LL +K G+FL+R S+ G Y+L + +++ H++IN+ +
Sbjct: 9 WFHGFITRKQTEQ-LLRDKALGSFLIRLSDRATG-YILSYRGSDRCRHFVINQ----LRN 62
Query: 73 TCYKI-GDK-TFSDLPSLLAFYK 93
Y I GD + S L L+ Y+
Sbjct: 63 RRYLISGDTSSHSTLAELVRHYQ 85
>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 = 48.1 bits (114), Expect = 7e-08
Identities = 19/51 (37%), Positives = 29/51 (56%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
VIA YD+ NDP +L + N+ ++ E HWW Q+ +G G +P Y+
Sbjct: 3 VIALYDYQTNDPQELALRYNEEYHLLDSSEIHWWRVQDKNGHEGYVPSSYL 53
>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 = 48.9 bits (117), Expect = 8e-08
Identities = 22/58 (37%), Positives = 33/58 (56%), Gaps = 2/58 (3%)
Query: 8 HDRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINK 65
HD +W G + R +A+ +L K +G FL+R+S+T G Y V N +V H +I K
Sbjct: 3 HDERTWLVGDINRTQAEELLRG-KPDGTFLIRESST-QGCYACSVVCNGEVKHCVIYK 58
>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 = 47.7 bits (114), Expect = 9e-08
Identities = 19/54 (35%), Positives = 26/54 (48%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDIL-IVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
KV A YDFD +L + ++L I + W +N GEVG P YV+
Sbjct: 1 KVRALYDFDSQPSGELSLRAGEVLTITRQDVGDGWLEGRNSRGEVGLFPSSYVE 54
Score = 34.2 bits (79), Expect = 0.005
Identities = 17/56 (30%), Positives = 30/56 (53%), Gaps = 9/56 (16%)
Query: 212 QVRVPNAYDKTA-----LKLEIGDIIKVTKTNI-NGQWEGE-LNGKTGHFPFTHVE 260
+VR YD + L L G+++ +T+ ++ +G EG G+ G FP ++VE
Sbjct: 1 KVRA--LYDFDSQPSGELSLRAGEVLTITRQDVGDGWLEGRNSRGEVGLFPSSYVE 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 = 47.4 bits (113), Expect = 9e-08
Identities = 21/51 (41%), Positives = 30/51 (58%), Gaps = 1/51 (1%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
V+AKYD+ +L KKN+ L ++ D +HWW QN S + G +P YV
Sbjct: 2 VVAKYDYTAQGDQELSIKKNEKLTLLD-DSKHWWKVQNSSNQTGYVPSNYV 51
>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 = 47.6 bits (113), Expect = 1e-07
Identities = 20/44 (45%), Positives = 27/44 (61%), Gaps = 1/44 (2%)
Query: 218 AYDKTALKLEIGDIIKV-TKTNINGQWEGELNGKTGHFPFTHVE 260
A D L L+ GD++K+ K G W GE+NG+ G FP T+VE
Sbjct: 10 ARDMRELSLKEGDVVKIYNKKGQQGWWRGEINGRIGWFPSTYVE 53
Score = 39.2 bits (91), Expect = 1e-04
Identities = 17/53 (32%), Positives = 31/53 (58%), Gaps = 2/53 (3%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSK-DEEHWWTAQNISGEVGSIPVPYVQK 165
A+YDF D +L K+ D++ + +K ++ WW + I+G +G P YV++
Sbjct: 3 KARYDFCARDMRELSLKEGDVVKIYNKKGQQGWWRGE-INGRIGWFPSTYVEE 54
>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 = 47.4 bits (113), Expect = 1e-07
Identities = 19/51 (37%), Positives = 32/51 (62%), Gaps = 2/51 (3%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDE-EHWWTAQNISGEVGSIPVPYV 163
+AK+DF D+L FKK IL V++ ++ +W+ A+ + G+ G IP Y+
Sbjct: 3 VAKHDFKATAEDELSFKKGSILKVLNMEDDPNWYKAE-LDGKEGLIPKNYI 52
>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 = 48.7 bits (116), Expect = 1e-07
Identities = 24/62 (38%), Positives = 36/62 (58%), Gaps = 6/62 (9%)
Query: 13 WYFGMMTRQEAQAILLSEKD-NGAFLVRDSNTILGNYVLCVKE-----NNKVSHYIINKI 66
WYFG + R++A+ LLS + GAFL+R+S T G Y L +++ + V HY I K+
Sbjct: 5 WYFGKIGRKDAERQLLSPGNPRGAFLIRESETTKGAYSLSIRDWDQNRGDHVKHYKIRKL 64
Query: 67 TN 68
Sbjct: 65 DT 66
>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 = 47.6 bits (114), Expect = 1e-07
Identities = 19/55 (34%), Positives = 31/55 (56%), Gaps = 10/55 (18%)
Query: 115 AKYDFDGNDPDDLP-------FKKNDILIVVSKDEEHWWTAQNI---SGEVGSIP 159
A +D+D + +P FKK DIL +V++D+ +WW A+ + +G G IP
Sbjct: 4 ALFDYDPEEDPLIPCKEAGLSFKKGDILQIVNQDDPNWWQARKVGDPNGRAGLIP 58
>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 = 47.1 bits (112), Expect = 1e-07
Identities = 17/52 (32%), Positives = 29/52 (55%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
KV+A YD+ + DL +K + +++ + WW A++ +G G IP YV
Sbjct: 2 KVVALYDYTPMNAQDLQLRKGEEYVILEESNLPWWRARDKNGREGYIPSNYV 53
>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 = 46.9 bits (112), Expect = 1e-07
Identities = 25/47 (53%), Positives = 29/47 (61%), Gaps = 5/47 (10%)
Query: 219 YDKTALK-----LEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
YD TA K + GDII VTK N +G +EG LNG TG FP +VE
Sbjct: 6 YDYTADKDDELSFQEGDIIYVTKKNDDGWYEGVLNGVTGLFPGNYVE 52
Score = 41.2 bits (97), Expect = 2e-05
Identities = 18/53 (33%), Positives = 32/53 (60%), Gaps = 1/53 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
KV+A YD+ + D+L F++ DI+ V K+++ W+ ++G G P YV+
Sbjct: 1 KVVALYDYTADKDDELSFQEGDIIYVTKKNDDGWYEGV-LNGVTGLFPGNYVE 52
>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 = 47.0 bits (112), Expect = 1e-07
Identities = 23/45 (51%), Positives = 29/45 (64%), Gaps = 2/45 (4%)
Query: 216 PNAYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
N D+ L L+ GDII+V + +G W GELNGK G FP T+VE
Sbjct: 10 ANREDE--LSLQPGDIIEVHEKQDDGWWLGELNGKKGIFPATYVE 52
Score = 44.3 bits (105), Expect = 1e-06
Identities = 16/50 (32%), Positives = 26/50 (52%), Gaps = 1/50 (2%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A Y + N D+L + DI+ V K ++ WW ++G+ G P YV+
Sbjct: 4 ALYSYTANREDELSLQPGDIIEVHEKQDDGWWLG-ELNGKKGIFPATYVE 52
>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 = 47.0 bits (112), Expect = 1e-07
Identities = 19/50 (38%), Positives = 33/50 (66%), Gaps = 1/50 (2%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A Y+++G +P DL FKK DI+++ + +E+W+ + +G+ G P YVQ
Sbjct: 4 ALYNYEGKEPGDLSFKKGDIILLRKRIDENWYHGE-CNGKQGFFPASYVQ 52
Score = 33.1 bits (76), Expect = 0.011
Identities = 16/38 (42%), Positives = 23/38 (60%), Gaps = 2/38 (5%)
Query: 224 LKLEIGDIIKVTKTNINGQW-EGELNGKTGHFPFTHVE 260
L + GDII + + I+ W GE NGK G FP ++V+
Sbjct: 16 LSFKKGDII-LLRKRIDENWYHGECNGKQGFFPASYVQ 52
>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 = 47.6 bits (114), Expect = 2e-07
Identities = 19/41 (46%), Positives = 25/41 (60%), Gaps = 3/41 (7%)
Query: 12 SWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCV 52
WY+G +TR EA+ LL+ K G FLVRDS+ Y+ V
Sbjct: 1 GWYWGGITRYEAEE-LLAGKPEGTFLVRDSSD--SRYLFSV 38
>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 = 46.5 bits (110), Expect = 2e-07
Identities = 19/53 (35%), Positives = 33/53 (62%), Gaps = 1/53 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+VI YD+ + D+L F K I+ V++K++ WW + ++G+VG P YV+
Sbjct: 2 QVIGMYDYTAQNDDELAFSKGQIINVLNKEDPDWWKGE-LNGQVGLFPSNYVK 53
Score = 31.1 bits (70), Expect = 0.076
Identities = 20/53 (37%), Positives = 25/53 (47%), Gaps = 5/53 (9%)
Query: 214 RVPNAYDKTA-----LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVEF 261
+V YD TA L G II V W+GELNG+ G FP +V+
Sbjct: 2 QVIGMYDYTAQNDDELAFSKGQIINVLNKEDPDWWKGELNGQVGLFPSNYVKL 54
>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 = 46.3 bits (110), Expect = 3e-07
Identities = 21/56 (37%), Positives = 31/56 (55%), Gaps = 5/56 (8%)
Query: 112 KVIAKYDFDGN--DPDDLPFKKNDILIVVSKDEE-HWWTAQNISGEVGSIPVPYVQ 164
+ A Y +D + DP++L F+K +IL V D WW A+ +GE G P Y+Q
Sbjct: 1 RARALYPYDASPDDPNELSFEKGEILEV--SDTSGKWWQARKSNGETGICPSNYLQ 54
>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 = 47.7 bits (113), Expect = 3e-07
Identities = 31/89 (34%), Positives = 44/89 (49%), Gaps = 9/89 (10%)
Query: 13 WYFGMMTRQEAQAILLSEKDN-GAFLVRDSNTILGNYVLCVKE-----NNKVSHYIINKI 66
WYFG M R++A+ +LL+ + G FLVR+S T G Y L +++ + V HY I K+
Sbjct: 5 WYFGKMGRKDAERLLLNPGNQRGIFLVRESETTKGAYSLSIRDWDEVRGDNVKHYKIRKL 64
Query: 67 TNTEQQTCYKIGDKTFSDLPSLLAFYKVH 95
N Y F L L+ Y H
Sbjct: 65 DNGGY---YITTRAQFDTLQKLVKHYTEH 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 = 3e-07
Identities = 28/82 (34%), Positives = 36/82 (43%), Gaps = 6/82 (7%)
Query: 13 WYFGMMTRQEAQAILLSEKD-NGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQ 71
W G + R EA IL + D +G+FLVR S G YVL + N V H+ I
Sbjct: 2 WLHGALDRNEAVEILKQKADADGSFLVRYSRRRPGGYVLTLVYENHVYHFEIQN----RD 57
Query: 72 QTCYKIGD-KTFSDLPSLLAFY 92
+ I D F L L+ Y
Sbjct: 58 DKWFYIDDGPYFESLEHLIEHY 79
>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 = 47.5 bits (113), Expect = 3e-07
Identities = 25/82 (30%), Positives = 40/82 (48%), Gaps = 5/82 (6%)
Query: 11 NSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTE 70
N WY G + R A+ L G++L+R+S+ G++VL V+H+ I +
Sbjct: 19 NQWYHGRLDRTIAEERLRQAGKLGSYLIRESDRRPGSFVLSFLSRTGVNHFRIIAMCGD- 77
Query: 71 QQTCYKIGDKTFSDLPSLLAFY 92
Y IG + FS L L+ +Y
Sbjct: 78 ----YYIGGRRFSSLSDLIGYY 95
>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 = 46.0 bits (109), Expect = 4e-07
Identities = 23/52 (44%), Positives = 33/52 (63%), Gaps = 2/52 (3%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNI-SGEVGSIPVPYV 163
VIA+YDF ++ DL KK + L V+ D E WW A+++ +G+ G IP YV
Sbjct: 2 VIAQYDFVPSNERDLQLKKGEKLQVLKSDGE-WWLAKSLTTGKEGYIPSNYV 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 = 45.8 bits (109), Expect = 4e-07
Identities = 18/54 (33%), Positives = 31/54 (57%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
K YD+ + D+L K D++ V+ K E+ WWT + +G+ G +P Y++K
Sbjct: 1 KYSVLYDYTAQEDDELSISKGDVVAVIEKGEDGWWTVER-NGQKGLVPGTYLEK 53
Score = 31.6 bits (72), Expect = 0.051
Identities = 14/44 (31%), Positives = 23/44 (52%)
Query: 217 NAYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
A + L + GD++ V + +G W E NG+ G P T++E
Sbjct: 9 TAQEDDELSISKGDVVAVIEKGEDGWWTVERNGQKGLVPGTYLE 52
>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 = 47.0 bits (112), Expect = 4e-07
Identities = 24/81 (29%), Positives = 44/81 (54%), Gaps = 6/81 (7%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
W+ +++ EA+ +L + +G+FL R S + G++ L V+ ++V+H KI NT
Sbjct: 2 WFHPVISGIEAENLLKTRGVDGSFLARPSKSNPGDFTLSVRRGDEVTHI---KIQNTGD- 57
Query: 73 TCYK-IGDKTFSDLPSLLAFY 92
Y G + F+ L L+ +Y
Sbjct: 58 -YYDLYGGEKFATLSELVQYY 77
>gnl|CDD|212756 cd11822, SH3_SASH_like, Src homology 3 domain of SAM And SH3 Domain
Containing Proteins. This subfamily, also called the
SLY family, is composed of SAM And SH3 Domain Containing
Protein 1 (SASH1), SASH2, SASH3, and similar proteins.
These are adaptor proteins containing a central
conserved region with a bipartite nuclear localization
signal (NLS) as wells as SAM (sterile alpha motif) and
SH3 domains. SASH1 is a potential tumor suppressor in
breast and colon cancer. 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. SASH2 (also
called SAMSN-1, SLY2, HACS1 or NASH1) and SASH3 (also
called SLY/SLY1) are expressed mainly in hematopoietic
cells, although SASH2 is also found in endothelial cells
as well as myeloid leukemias and myeloma. SASH2 was
found to be differentially expressed in malignant
haematopoietic cells and in colorectal tumors, and is a
potential tumor suppressor in lung cancer. SASH3 is
essential in the full activation of adaptive immunity
and is involved in the signaling of T cell receptors.
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 = 45.7 bits (108), Expect = 4e-07
Identities = 21/51 (41%), Positives = 28/51 (54%)
Query: 208 ARVKQVRVPNAYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTH 258
A+V P+ YD +LKL+ GDII + G W G LN K G+F F +
Sbjct: 2 AKVHTDFTPSPYDTDSLKLKKGDIIDIINKPPMGIWTGMLNNKVGNFKFIY 52
>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 = 46.8 bits (111), Expect = 5e-07
Identities = 25/56 (44%), Positives = 37/56 (66%), Gaps = 6/56 (10%)
Query: 13 WYFGMMTRQEAQAILLS-EKDNGAFLV--RDSNTILGNYVLCVKENNKVSHYIINK 65
W+ G ++R+E++ ILL K NG FL+ RD+N G+Y LC+ + KV HY I+K
Sbjct: 5 WFHGKISREESEQILLIGSKTNGKFLIRERDNN---GSYALCLLHDGKVLHYRIDK 57
>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 = 45.4 bits (108), Expect = 5e-07
Identities = 15/34 (44%), Positives = 20/34 (58%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWW 146
V+A YDF + L FK DI+ V++KD WW
Sbjct: 2 VVALYDFTPKSKNQLSFKAGDIIYVLNKDPSGWW 35
Score = 30.3 bits (69), Expect = 0.11
Identities = 14/44 (31%), Positives = 19/44 (43%), Gaps = 5/44 (11%)
Query: 217 NAYDKTALKLEIGDIIKVTKTNINGQWEGELNG-----KTGHFP 255
K L + GDII V + +G W+G + K G FP
Sbjct: 9 TPKSKNQLSFKAGDIIYVLNKDPSGWWDGVIISSSGKVKRGWFP 52
>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 = 45.4 bits (107), Expect = 6e-07
Identities = 21/53 (39%), Positives = 33/53 (62%), Gaps = 1/53 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+VIA YD+ N+ D+L F K ++ V++KD+ WW + I+G G P YV+
Sbjct: 2 QVIAMYDYTANNEDELSFSKGQLINVLNKDDPDWWQGE-INGVTGLFPSNYVK 53
Score = 30.3 bits (68), Expect = 0.14
Identities = 18/47 (38%), Positives = 24/47 (51%), Gaps = 5/47 (10%)
Query: 219 YDKTA-----LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
YD TA L G +I V + W+GE+NG TG FP +V+
Sbjct: 7 YDYTANNEDELSFSKGQLINVLNKDDPDWWQGEINGVTGLFPSNYVK 53
>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 = 45.2 bits (107), Expect = 6e-07
Identities = 19/51 (37%), Positives = 30/51 (58%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
V+A YD+ N D+L + DI+ V+ KD ++WW ++G+ G P YV
Sbjct: 2 VVALYDYTANRSDELTIHRGDIIRVLYKDNDNWWFGSLVNGQQGYFPANYV 52
>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 = 46.0 bits (109), Expect = 6e-07
Identities = 22/82 (26%), Positives = 42/82 (51%), Gaps = 8/82 (9%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
W+ G +TR+EA+ LL K G +LVR S + + +VL + H+++ ++ +
Sbjct: 2 WFHGFITRREAER-LLEPKPQGCYLVRFSESAVT-FVLSYRSRTCCRHFLLAQLRD---- 55
Query: 73 TCYKI-GDKT-FSDLPSLLAFY 92
+ + G+ + + L LL Y
Sbjct: 56 GRHVVLGEDSAHARLQDLLLHY 77
>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 = 46.2 bits (109), Expect = 7e-07
Identities = 24/81 (29%), Positives = 41/81 (50%), Gaps = 5/81 (6%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
WY+G +TR +A+ L G FL+RDS + ++ + +K K H+ + + N
Sbjct: 3 WYYGNVTRHQAECALNERGVEGDFLIRDSESSPSDFSVSLKAVGKNKHFKVQLVDNV--- 59
Query: 73 TCYKIGDKTFSDLPSLLAFYK 93
Y IG + F+ + L+ YK
Sbjct: 60 --YCIGQRRFNSMDELVEHYK 78
>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 = 44.9 bits (106), Expect = 8e-07
Identities = 18/52 (34%), Positives = 30/52 (57%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
+V A YDF +P +L K+ + +++ + + HWW A++ G G IP YV
Sbjct: 2 QVKALYDFLPREPSNLALKRAEEYLILEQYDPHWWKARDRYGNEGLIPSNYV 53
>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 = 46.2 bits (109), Expect = 9e-07
Identities = 27/86 (31%), Positives = 41/86 (47%), Gaps = 7/86 (8%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
WY G M R A++IL + D G +LVR + + +K N +V H I +
Sbjct: 7 WYAGPMERAGAESILANRSD-GTYLVRQRVKDAAEFAISIKYNVEVKHIKI-----MTAE 60
Query: 73 TCYKIGD-KTFSDLPSLLAFYKVHYL 97
Y+I + K F L L+ FY+ + L
Sbjct: 61 GLYRITEKKAFRGLTELVEFYQQNSL 86
>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 = 46.1 bits (109), Expect = 1e-06
Identities = 27/90 (30%), Positives = 46/90 (51%), Gaps = 2/90 (2%)
Query: 8 HDRNSWYFGMMTRQEAQAILLSEKD-NGAFLVRDSNTILGNYVLCVKENNKVSHY-IINK 65
H W+ ++R EAQ +++ + +G FLVRDS + +VL + K+ H+ II
Sbjct: 2 HRSQPWFHHKISRDEAQRLIIQQGLVDGVFLVRDSQSNPRTFVLSMSHGQKIKHFQIIPV 61
Query: 66 ITNTEQQTCYKIGDKTFSDLPSLLAFYKVH 95
+ E G F+DL L+ FY+++
Sbjct: 62 EDDGELFHTLDDGHTRFTDLIQLVEFYQLN 91
>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 = 44.6 bits (106), Expect = 1e-06
Identities = 19/49 (38%), Positives = 29/49 (59%), Gaps = 1/49 (2%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
A YD++ PD+L F++ D+L + K + +WW A G+ G IP YV
Sbjct: 4 ALYDYEAQHPDELSFEEGDLLYISDKSDPNWWKAT-CGGKTGLIPSNYV 51
Score = 29.6 bits (67), Expect = 0.22
Identities = 12/37 (32%), Positives = 19/37 (51%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
L E GD++ ++ + W+ GKTG P +VE
Sbjct: 16 LSFEEGDLLYISDKSDPNWWKATCGGKTGLIPSNYVE 52
>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 = 44.6 bits (106), Expect = 1e-06
Identities = 16/56 (28%), Positives = 31/56 (55%), Gaps = 2/56 (3%)
Query: 111 EKVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEH-WWTAQNIS-GEVGSIPVPYVQ 164
++ YDFD D+L K+ D++ ++ + WW +N+S G+ G +P Y++
Sbjct: 1 KRGKVLYDFDAQSDDELTVKEGDVVYILDDKKSKDWWMVENVSTGKEGVVPASYIE 56
>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 = 45.9 bits (109), Expect = 1e-06
Identities = 26/90 (28%), Positives = 48/90 (53%), Gaps = 10/90 (11%)
Query: 9 DRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCV----KENNKVSHYIIN 64
++ WY G M+RQ A+++L E G F+VR+S+T G Y + + + V HY I
Sbjct: 4 EKYEWYVGDMSRQRAESLLKQEDKEGCFVVRNSST-KGLYTVSLFTKVPGSPHVKHYHIK 62
Query: 65 KITNTEQQTCYKIGDK-TFSDLPSLLAFYK 93
+ N + + + +K F +P L+ +++
Sbjct: 63 Q--NARSE--FYLAEKHCFETIPELINYHQ 88
>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 = 44.5 bits (105), Expect = 1e-06
Identities = 20/44 (45%), Positives = 27/44 (61%), Gaps = 1/44 (2%)
Query: 218 AYDKTALKLEIGDIIKV-TKTNINGQWEGELNGKTGHFPFTHVE 260
A D++ L L+ GDIIK+ K G W GE+ G+ G FP +VE
Sbjct: 10 ARDRSELSLKEGDIIKILNKKGQQGWWRGEIYGRVGWFPANYVE 53
Score = 38.8 bits (90), Expect = 1e-04
Identities = 18/51 (35%), Positives = 28/51 (54%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
A+YDF D +L K+ DI+ +++K + W I G VG P YV++
Sbjct: 4 ARYDFCARDRSELSLKEGDIIKILNKKGQQGWWRGEIYGRVGWFPANYVEE 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 = 45.7 bits (108), Expect = 1e-06
Identities = 26/91 (28%), Positives = 48/91 (52%), Gaps = 4/91 (4%)
Query: 8 HDRNSWYFGMMTRQEAQAILLSEK-DNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKI 66
H W+ G ++R+E+Q ++ + +G FLVR+S +VL + KV HY+I
Sbjct: 2 HRTQPWFHGRISREESQRLIGQQGLVDGVFLVRESQRNPQGFVLSLCHLQKVKHYLILPS 61
Query: 67 TNTEQQTCYKI--GDKTFSDLPSLLAFYKVH 95
E + + + G F+DL L+ F++++
Sbjct: 62 -EEEGRLYFSMDDGQTRFTDLLQLVEFHQLN 91
>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 = 44.3 bits (104), Expect = 1e-06
Identities = 19/51 (37%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNI-SGEVGSIPVPYV 163
+A YD++ +DL FKK + +++ E WW A++I +G+ G IP YV
Sbjct: 4 VALYDYEARTTEDLSFKKGERFQIINNTEGDWWEARSIATGKNGYIPSNYV 54
>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 = 44.5 bits (105), Expect = 1e-06
Identities = 20/59 (33%), Positives = 33/59 (55%), Gaps = 10/59 (16%)
Query: 113 VIAKYDFDGNDPDDLP-------FKKNDILIVVSKDEEHWWTAQ---NISGEVGSIPVP 161
V A++++D D +P F+ DIL ++SKD+ +WW A+ + +G G IP P
Sbjct: 2 VRAQFEYDPLKDDLIPCKQAGIRFRVGDILQIISKDDHNWWQAKLENSKNGTAGLIPSP 60
>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 = 44.2 bits (105), Expect = 1e-06
Identities = 20/37 (54%), Positives = 24/37 (64%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
L + GDII VT+ G WEG LNGKTG FP +V+
Sbjct: 16 LSFDKGDIITVTQVVEGGWWEGTLNGKTGWFPSNYVK 52
Score = 43.5 bits (103), Expect = 2e-06
Identities = 20/52 (38%), Positives = 29/52 (55%), Gaps = 1/52 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
V AK++F+G + D+L F K DI+ V E WW ++G+ G P YV
Sbjct: 1 LVRAKFNFEGTNEDELSFDKGDIITVTQVVEGGWWEG-TLNGKTGWFPSNYV 51
>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 = 45.4 bits (107), Expect = 1e-06
Identities = 26/87 (29%), Positives = 48/87 (55%), Gaps = 9/87 (10%)
Query: 13 WYFGMMTRQEAQAILLSEKDN-GAFLVRDSNTILGNYVLCVKE-----NNKVSHYIINKI 66
W+F +TR++A+ LL+ ++ GAFL+R+S T+ G+Y L V++ + + HY I +
Sbjct: 5 WFFKDITRKDAERQLLAPGNSAGAFLIRESETLKGSYSLSVRDYDPQHGDVIKHYKIRSL 64
Query: 67 TNTEQQTCYKIGDKTFSDLPSLLAFYK 93
N +I TF + ++ Y+
Sbjct: 65 DNGGYYISPRI---TFPCISDMIKHYQ 88
>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 = 43.9 bits (104), Expect = 2e-06
Identities = 20/52 (38%), Positives = 30/52 (57%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
V A YD++G + D+L FK DIL + +++E W + G VG P YV+
Sbjct: 2 VRALYDYEGQESDELSFKAGDILTKLEEEDEQGWCKGRLDGRVGLYPANYVE 53
>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 = 44.0 bits (104), Expect = 2e-06
Identities = 22/47 (46%), Positives = 26/47 (55%), Gaps = 4/47 (8%)
Query: 216 PNAYDKTALKLEIGDIIKVTKTNI--NGQWEGELNGKTGHFPFTHVE 260
P A D+ ALK GD+I+V G WEGELNG+ G FP V
Sbjct: 10 PVAPDELALK--KGDVIEVISKETEDEGWWEGELNGRRGFFPDNFVM 54
Score = 29.7 bits (67), Expect = 0.19
Identities = 17/49 (34%), Positives = 30/49 (61%), Gaps = 3/49 (6%)
Query: 117 YDFDGNDPDDLPFKKNDILIVVSK--DEEHWWTAQNISGEVGSIPVPYV 163
+D++ PD+L KK D++ V+SK ++E WW + ++G G P +V
Sbjct: 6 FDYNPVAPDELALKKGDVIEVISKETEDEGWWEGE-LNGRRGFFPDNFV 53
>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 = 45.4 bits (107), Expect = 2e-06
Identities = 24/62 (38%), Positives = 36/62 (58%), Gaps = 6/62 (9%)
Query: 13 WYFGMMTRQEAQAILLSEKD-NGAFLVRDSNTILGNYVLCVKE-----NNKVSHYIINKI 66
WYFG + R++A+ LLS + G FL+R+S T G Y L +++ + V HY I K+
Sbjct: 5 WYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIRKL 64
Query: 67 TN 68
N
Sbjct: 65 DN 66
>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 = 45.1 bits (106), Expect = 2e-06
Identities = 27/86 (31%), Positives = 43/86 (50%), Gaps = 4/86 (4%)
Query: 13 WYFGMMTRQEAQAILLSEKDN-GAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQ 71
W+FG ++R EA L +E + GAFL+R S +YVL V++ V HY I +
Sbjct: 4 WFFGCISRSEAVRRLQAEGNATGAFLIRVSEKPSADYVLSVRDTQAVRHYKIWRRAGGRL 63
Query: 72 QTCYKIGDKTFSDLPSLLAFYKVHYL 97
+ +F LP L+ +++ L
Sbjct: 64 HLNEAV---SFLSLPELVNYHRAQSL 86
>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 = 43.8 bits (104), Expect = 2e-06
Identities = 20/56 (35%), Positives = 29/56 (51%), Gaps = 6/56 (10%)
Query: 115 AKYDFDGNDPD-DLPFKKNDILIVVSK-----DEEHWWTAQNISGEVGSIPVPYVQ 164
A YDF +P+ +L KK DI+ V+SK + WW + G +G P YV+
Sbjct: 4 ALYDFTPENPEMELSLKKGDIVAVLSKTDPLGRDSEWWKGRTRDGRIGWFPSNYVE 59
Score = 35.3 bits (82), Expect = 0.002
Identities = 20/60 (33%), Positives = 30/60 (50%), Gaps = 7/60 (11%)
Query: 207 FARVKQVRVPNAYDKTALKLEIGDIIKV-TKTNINGQ----WEGEL-NGKTGHFPFTHVE 260
F R P + L L+ GDI+ V +KT+ G+ W+G +G+ G FP +VE
Sbjct: 1 FCRALYDFTPEN-PEMELSLKKGDIVAVLSKTDPLGRDSEWWKGRTRDGRIGWFPSNYVE 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 = 43.9 bits (103), Expect = 2e-06
Identities = 23/55 (41%), Positives = 30/55 (54%)
Query: 208 ARVKQVRVPNAYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVEFI 262
ARV P+ YD +LKL+ GDII + G W G LN K G F F +V+ +
Sbjct: 3 ARVHTDFTPSPYDTDSLKLKKGDIIDIISKPPMGTWMGLLNNKVGTFKFIYVDVL 57
>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 = 43.8 bits (103), Expect = 2e-06
Identities = 19/50 (38%), Positives = 32/50 (64%), Gaps = 1/50 (2%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A Y ++G +P DL F K DI+I+ K +E+W+ + ++G G +P Y+Q
Sbjct: 5 ALYSYEGKEPGDLKFNKGDIIILRRKVDENWYHGE-LNGCHGFLPASYIQ 53
Score = 31.4 bits (71), Expect = 0.049
Identities = 14/38 (36%), Positives = 22/38 (57%), Gaps = 2/38 (5%)
Query: 224 LKLEIGDIIKVTKTNINGQW-EGELNGKTGHFPFTHVE 260
LK GDII + + ++ W GELNG G P ++++
Sbjct: 17 LKFNKGDII-ILRRKVDENWYHGELNGCHGFLPASYIQ 53
>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 = 45.1 bits (107), Expect = 2e-06
Identities = 25/85 (29%), Positives = 43/85 (50%), Gaps = 3/85 (3%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
WY G +TR EA+++L K+ G++LVR+S + +Y L +K H I + N Q
Sbjct: 3 WYHGAITRIEAESLLRPCKE-GSYLVRNSESTKQDYSLSLKSAKGFMHMRIQR--NETGQ 59
Query: 73 TCYKIGDKTFSDLPSLLAFYKVHYL 97
+ F +P ++ Y ++ L
Sbjct: 60 YILGQFSRPFETIPEMIRHYCLNKL 84
>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 = 45.0 bits (106), Expect = 3e-06
Identities = 29/87 (33%), Positives = 46/87 (52%), Gaps = 9/87 (10%)
Query: 13 WYFGMMTRQEAQAILLSEKDN-GAFLVRDSNTILGNYVLCVKE-----NNKVSHYIINKI 66
W+F ++R++A+ LL+ + G+F++RDS T G+Y L V++ + V HY KI
Sbjct: 5 WFFKGISRKDAERQLLAPGNMLGSFMIRDSETTKGSYSLSVRDYDPQHGDTVKHY---KI 61
Query: 67 TNTEQQTCYKIGDKTFSDLPSLLAFYK 93
+ Y TFS L L+ YK
Sbjct: 62 RTLDNGGFYISPRSTFSTLQELVDHYK 88
>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 = 44.6 bits (105), Expect = 3e-06
Identities = 24/62 (38%), Positives = 36/62 (58%), Gaps = 6/62 (9%)
Query: 13 WYFGMMTRQEAQAILLSEKD-NGAFLVRDSNTILGNYVLCVKE-----NNKVSHYIINKI 66
WYFG + R++A+ LLS + G FL+R+S T G Y L +++ + V HY I K+
Sbjct: 5 WYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIRKL 64
Query: 67 TN 68
N
Sbjct: 65 DN 66
>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 = 43.2 bits (102), Expect = 3e-06
Identities = 21/52 (40%), Positives = 28/52 (53%), Gaps = 2/52 (3%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
IA Y ++ N+P DL F D+++V KD E WWT I G P YV+
Sbjct: 3 IALYPYESNEPGDLTFNAGDVILVTKKDGE-WWTG-TIGDRTGIFPSNYVRP 52
Score = 28.9 bits (65), Expect = 0.40
Identities = 15/37 (40%), Positives = 21/37 (56%), Gaps = 3/37 (8%)
Query: 224 LKLEIGDIIKVTKTNINGQW-EGELNGKTGHFPFTHV 259
L GD+I VTK + G+W G + +TG FP +V
Sbjct: 16 LTFNAGDVILVTKKD--GEWWTGTIGDRTGIFPSNYV 50
>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 = 43.3 bits (102), Expect = 3e-06
Identities = 17/50 (34%), Positives = 28/50 (56%), Gaps = 1/50 (2%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
+A +D+ G +L FK+ D+L++ SK WW + +G G IP Y+
Sbjct: 5 VACFDYTGRTAQELSFKRGDVLLLHSKASSDWWRGE-HNGMRGLIPHKYI 53
>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 = 42.9 bits (101), Expect = 4e-06
Identities = 16/52 (30%), Positives = 26/52 (50%), Gaps = 1/52 (1%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
V A +DFD + +L F++ D + V+ + +WW G+ G P YV
Sbjct: 2 VQALFDFDPQEDGELGFRRGDFIEVMDNSDPNWWKGA-CHGQTGMFPRNYVT 52
Score = 29.8 bits (67), Expect = 0.18
Identities = 12/32 (37%), Positives = 18/32 (56%)
Query: 229 GDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
GD I+V + W+G +G+TG FP +V
Sbjct: 21 GDFIEVMDNSDPNWWKGACHGQTGMFPRNYVT 52
>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 = 43.1 bits (102), Expect = 4e-06
Identities = 15/51 (29%), Positives = 27/51 (52%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A YD+ + +++ F + DI+ + + +E WW N G+ G P YV+
Sbjct: 3 KALYDYQAAEDNEISFVEGDIITQIEQIDEGWWLGVNAKGQKGLFPANYVE 53
>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 = 42.8 bits (101), Expect = 4e-06
Identities = 19/54 (35%), Positives = 28/54 (51%), Gaps = 3/54 (5%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEH--WWTAQNISGEVGSIPVPYVQ 164
V A Y F+G P DL F+ D + V+++ + WW + + G VG P YV
Sbjct: 2 VTALYSFEGQQPCDLSFQAGDRITVLTRTDSQFDWWEGR-LRGRVGIFPANYVS 54
Score = 35.4 bits (82), Expect = 0.002
Identities = 16/38 (42%), Positives = 21/38 (55%), Gaps = 2/38 (5%)
Query: 224 LKLEIGDIIKV-TKTNI-NGQWEGELNGKTGHFPFTHV 259
L + GD I V T+T+ WEG L G+ G FP +V
Sbjct: 16 LSFQAGDRITVLTRTDSQFDWWEGRLRGRVGIFPANYV 53
>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 = 42.6 bits (101), Expect = 5e-06
Identities = 19/37 (51%), Positives = 22/37 (59%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
L L++GDII K G WEG LNGK G FP V+
Sbjct: 16 LTLKVGDIITNVKKMEEGWWEGTLNGKRGMFPDNFVK 52
Score = 40.3 bits (95), Expect = 3e-05
Identities = 20/54 (37%), Positives = 32/54 (59%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
+VI ++D+D +PD+L K DI+ V K EE WW ++G+ G P +V+
Sbjct: 1 EVIVEFDYDAEEPDELTLKVGDIITNVKKMEEGWWEGT-LNGKRGMFPDNFVKV 53
>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 = 43.0 bits (101), Expect = 5e-06
Identities = 22/54 (40%), Positives = 32/54 (59%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVV-SKDEEHWWTAQNISGEVGSIPVPYVQ 164
+V A YD+DG + D+L FK D L + +DE+ W + SG+VG P YV+
Sbjct: 2 RVRALYDYDGQEQDELSFKAGDELTKLEDEDEQGWCKGRLDSGQVGLYPANYVE 55
>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 = 42.7 bits (100), Expect = 5e-06
Identities = 20/53 (37%), Positives = 33/53 (62%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+ IAKYDF D+L FK+ DIL V++++ + W ++G+ G IP Y++
Sbjct: 2 EAIAKYDFKATADDELSFKRGDILKVLNEECDQNWYKAELNGKDGFIPKNYIE 54
Score = 27.7 bits (61), Expect = 1.1
Identities = 15/38 (39%), Positives = 21/38 (55%), Gaps = 1/38 (2%)
Query: 224 LKLEIGDIIKVTKTNINGQW-EGELNGKTGHFPFTHVE 260
L + GDI+KV + W + ELNGK G P ++E
Sbjct: 17 LSFKRGDILKVLNEECDQNWYKAELNGKDGFIPKNYIE 54
>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 = 42.7 bits (100), Expect = 5e-06
Identities = 21/41 (51%), Positives = 27/41 (65%), Gaps = 2/41 (4%)
Query: 215 VPNAYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFP 255
+P D+ L+L++GDII+V G WEG LNGKTG FP
Sbjct: 9 LPQNEDE--LELKVGDIIEVVGEVEEGWWEGVLNGKTGMFP 47
Score = 28.8 bits (64), Expect = 0.43
Identities = 14/41 (34%), Positives = 24/41 (58%), Gaps = 1/41 (2%)
Query: 125 DDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
D+L K DI+ VV + EE WW ++G+ G P ++++
Sbjct: 14 DELELKVGDIIEVVGEVEEGWWEGV-LNGKTGMFPSNFIKE 53
>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 = 43.9 bits (103), Expect = 5e-06
Identities = 24/62 (38%), Positives = 36/62 (58%), Gaps = 6/62 (9%)
Query: 13 WYFGMMTRQEAQAILLSEKD-NGAFLVRDSNTILGNYVLCVKE-----NNKVSHYIINKI 66
WYFG + R++A+ LLS + G FL+R+S T G Y L +++ + V HY I K+
Sbjct: 5 WYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIRKL 64
Query: 67 TN 68
N
Sbjct: 65 DN 66
>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 = 43.8 bits (103), Expect = 5e-06
Identities = 27/86 (31%), Positives = 42/86 (48%), Gaps = 7/86 (8%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
WY G M R +A+ L++ + N +LVR G Y + +K NN+V H I +
Sbjct: 7 WYAGAMERLQAETELIN-RVNSTYLVRHRTKESGEYAISIKYNNEVKH-----IKILTRD 60
Query: 73 TCYKIGD-KTFSDLPSLLAFYKVHYL 97
+ I + + F L L+ +YK H L
Sbjct: 61 GFFHIAENRKFKSLMELVEYYKHHSL 86
>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 = 44.1 bits (104), Expect = 6e-06
Identities = 27/95 (28%), Positives = 46/95 (48%), Gaps = 12/95 (12%)
Query: 6 DPHDRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCV------KENNKVS 59
D + WY MTR +A+ +L E G F+VRDS + G Y + V +
Sbjct: 1 DSLEMYEWYSKNMTRSQAEQLLKQEGKEGGFIVRDS-SKAGKYTVSVFAKSAGDPQGVIR 59
Query: 60 HYIINKITNTEQQTCYKIGDK-TFSDLPSLLAFYK 93
HY++ + Q+ Y + +K FS +P L+ +++
Sbjct: 60 HYVV----CSTPQSQYYLAEKHLFSTIPELINYHQ 90
>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 = 44.0 bits (104), Expect = 6e-06
Identities = 26/88 (29%), Positives = 42/88 (47%), Gaps = 9/88 (10%)
Query: 11 NSWYFGMMTRQEAQAIL-LSEKDNGAFLVRDSNTILGNYVLCVK-----ENNKVSHYIIN 64
+ W F ++R++A+ +L L G+FL+R+S T G Y L V+ + V HY I
Sbjct: 10 HGWLFEGLSREKAEELLMLPGNQVGSFLIRESETRRGCYSLSVRHRGSQSRDSVKHYRIF 69
Query: 65 KITNTEQQTCYKIGDKTFSDLPSLLAFY 92
++ N Y TF L ++ Y
Sbjct: 70 RLDNG---WFYISPRLTFQCLEDMVNHY 94
>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 = 42.2 bits (99), Expect = 7e-06
Identities = 16/50 (32%), Positives = 28/50 (56%), Gaps = 1/50 (2%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
IAK+D+ G +L FKK L++ + + WW ++ +G G +P Y+
Sbjct: 3 IAKFDYVGRSARELSFKKGASLLLYHRASDDWWEGRH-NGIDGLVPHQYI 51
>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 = 42.4 bits (100), Expect = 7e-06
Identities = 17/50 (34%), Positives = 29/50 (58%), Gaps = 4/50 (8%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSK---DEEHWWTAQNISGEVGSIP 159
V A +D++ + D+L F++ D L V+ K DE WW A+ + + G +P
Sbjct: 3 VYALFDYEAENGDELSFREGDELTVLRKGDDDETEWWWARL-NDKEGYVP 51
>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 = 42.3 bits (99), Expect = 7e-06
Identities = 19/54 (35%), Positives = 32/54 (59%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVS-KDEEHWWTAQNISGEVGSIPVPYVQ 164
+V A YD+ G + D+L FK + L+ + +DE+ W + +SG +G P YV+
Sbjct: 3 RVRALYDYTGQEADELSFKAGEELLKIGEEDEQGWCKGRLLSGRIGLYPANYVE 56
>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 = 42.3 bits (100), Expect = 7e-06
Identities = 18/37 (48%), Positives = 24/37 (64%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
L+L++GD I+V G WEG+LNGK G FP V+
Sbjct: 16 LELKVGDTIEVLGEVEEGWWEGKLNGKVGVFPSNFVK 52
Score = 28.5 bits (64), Expect = 0.54
Identities = 14/40 (35%), Positives = 24/40 (60%), Gaps = 1/40 (2%)
Query: 125 DDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
D+L K D + V+ + EE WW + ++G+VG P +V+
Sbjct: 14 DELELKVGDTIEVLGEVEEGWWEGK-LNGKVGVFPSNFVK 52
>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 = 41.9 bits (99), Expect = 9e-06
Identities = 16/47 (34%), Positives = 23/47 (48%), Gaps = 1/47 (2%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIP 159
V YDF + +L K + L V+ D WW +N G+VG +P
Sbjct: 2 VRVLYDFTARNSKELSVLKGEYLEVLD-DSRQWWKVRNSRGQVGYVP 47
>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 = 41.9 bits (99), Expect = 9e-06
Identities = 17/50 (34%), Positives = 32/50 (64%), Gaps = 1/50 (2%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A YDF+ + +L FK+ DI+ + ++ +E+W+ ++G+ G PV YV+
Sbjct: 5 ALYDFEPENEGELGFKEGDIITLTNQIDENWYEGM-VNGQSGFFPVNYVE 53
Score = 38.8 bits (91), Expect = 1e-04
Identities = 16/35 (45%), Positives = 23/35 (65%), Gaps = 2/35 (5%)
Query: 229 GDIIKVTKTNINGQW-EGELNGKTGHFPFTHVEFI 262
GDII +T I+ W EG +NG++G FP +VE +
Sbjct: 22 GDIITLT-NQIDENWYEGMVNGQSGFFPVNYVEVL 55
>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 = 41.6 bits (98), Expect = 1e-05
Identities = 19/51 (37%), Positives = 33/51 (64%), Gaps = 3/51 (5%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSK--DEEHWWTAQNISGEVGSIPVPYV 163
+D GN+PD+L FK+ D++ ++SK D WW + ++G+VG +P Y+
Sbjct: 4 GLWDCSGNEPDELSFKRGDLIYIISKEYDSFGWWVGE-LNGKVGLVPKDYL 53
Score = 27.8 bits (62), Expect = 0.88
Identities = 13/34 (38%), Positives = 17/34 (50%), Gaps = 2/34 (5%)
Query: 224 LKLEIGDIIKVTKTNINGQ--WEGELNGKTGHFP 255
L + GD+I + + W GELNGK G P
Sbjct: 16 LSFKRGDLIYIISKEYDSFGWWVGELNGKVGLVP 49
>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 = 41.9 bits (99), Expect = 1e-05
Identities = 17/54 (31%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWT-AQNISGEVGSIPVPYVQ 164
A YDFDG L ++ +IL+V+ +D WT + +G+ G +P Y++
Sbjct: 1 TCTALYDFDGTSEGTLSMEEGEILLVLEEDGGDGWTRVRKNNGDEGYVPTSYIE 54
>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 = 41.5 bits (98), Expect = 1e-05
Identities = 19/53 (35%), Positives = 27/53 (50%), Gaps = 2/53 (3%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNI--SGEVGSIPVPYVQ 164
I YDF PD+L K D +I+ + W+ A+ I G G IPV +V+
Sbjct: 3 IVLYDFKAERPDELDAKAGDAIIICAHSNYEWFVAKPIGRLGGPGLIPVSFVE 55
>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 = 41.6 bits (98), Expect = 1e-05
Identities = 16/50 (32%), Positives = 28/50 (56%), Gaps = 1/50 (2%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
A++D+ G +L FKK D L + + + WW Q ++G+ G +P Y+
Sbjct: 3 TAQFDYTGRSERELSFKKGDSLTLYRQVSDDWWRGQ-LNGQDGLVPHKYI 51
>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 = 43.1 bits (102), Expect = 1e-05
Identities = 18/48 (37%), Positives = 32/48 (66%), Gaps = 3/48 (6%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVK--ENNKV 58
WY+G ++R+E + + +G FLVRD++T+ G+Y L ++ NNK+
Sbjct: 9 WYWGDISREEVNEKM-RDTPDGTFLVRDASTMKGDYTLTLRKGGNNKL 55
>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 = 41.5 bits (98), Expect = 1e-05
Identities = 16/54 (29%), Positives = 30/54 (55%), Gaps = 4/54 (7%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGE---VGSIPVPY 162
+V A YD ++ D+L F + +I++V ++++ WW I G+ G PV +
Sbjct: 1 RVRALYDCQADNDDELTFSEGEIIVVTGEEDDEWWEGH-IEGDPSRRGVFPVSF 53
Score = 30.0 bits (68), Expect = 0.18
Identities = 18/50 (36%), Positives = 21/50 (42%), Gaps = 8/50 (16%)
Query: 214 RVPNAYDKTA-----LKLEIGDIIKVTKTNINGQWEGELNGK---TGHFP 255
RV YD A L G+II VT + WEG + G G FP
Sbjct: 1 RVRALYDCQADNDDELTFSEGEIIVVTGEEDDEWWEGHIEGDPSRRGVFP 50
>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 = 41.6 bits (98), Expect = 1e-05
Identities = 16/52 (30%), Positives = 30/52 (57%), Gaps = 4/52 (7%)
Query: 114 IAKYDFDGNDPDD---LPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPY 162
A YDF+ D D+ L FKK D++ V+ + +E+W + + ++G P+ +
Sbjct: 3 KALYDFEMKDEDEKDCLTFKKGDVITVIRRVDENWAEGR-LGDKIGIFPISF 53
>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 = 41.7 bits (98), Expect = 1e-05
Identities = 19/55 (34%), Positives = 29/55 (52%), Gaps = 6/55 (10%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKD-----EEHWWTAQNISGEVGSIPVPYVQ 164
A +D+D D+L ++ + V+SKD +E WWT + I +VG P YV
Sbjct: 4 ALFDYDARGEDELTLRRGQPVEVLSKDAAVSGDEGWWTGK-IGDKVGIFPSNYVA 57
>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 = 41.6 bits (98), Expect = 1e-05
Identities = 18/55 (32%), Positives = 28/55 (50%), Gaps = 8/55 (14%)
Query: 214 RVPNAYDKTA---LKLEIGDIIKVTKTNINGQWEGELNGK-----TGHFPFTHVE 260
+V + TA L L +G ++ V K + +G WEGEL + G FP +V+
Sbjct: 3 QVIAPFTATAENQLSLAVGQLVLVRKKSPSGWWEGELQARGKKRQIGWFPANYVK 57
>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 = 1e-05
Identities = 25/56 (44%), Positives = 34/56 (60%), Gaps = 6/56 (10%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEH--WWTAQNISG-EVGSIPVPYVQK 165
V+A Y +DG DDL FKK + L V+ EEH WW A++++ + G IP YV K
Sbjct: 2 VVALYPYDGIHEDDLSFKKGEKLKVI---EEHGEWWKARSLTTKKEGFIPSNYVAK 54
>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 = 41.2 bits (97), Expect = 1e-05
Identities = 17/53 (32%), Positives = 25/53 (47%), Gaps = 1/53 (1%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
+A DF D L F+ D L+V+ K WW A +G G IP ++ +
Sbjct: 2 YVAIADFVATDDSQLSFESGDKLLVLRKPSVDWWWA-EHNGCCGYIPASHLHQ 53
Score = 31.6 bits (72), Expect = 0.040
Identities = 14/42 (33%), Positives = 20/42 (47%)
Query: 218 AYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHV 259
A D + L E GD + V + W E NG G+ P +H+
Sbjct: 10 ATDDSQLSFESGDKLLVLRKPSVDWWWAEHNGCCGYIPASHL 51
>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 = 42.5 bits (100), Expect = 2e-05
Identities = 29/99 (29%), Positives = 51/99 (51%), Gaps = 5/99 (5%)
Query: 14 YFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNT---E 70
Y G ++R+ + +LL+ +G++L+RDS ++ G Y LCV V Y +++ T T
Sbjct: 6 YHGKISRETGEKLLLAAGLDGSYLLRDSESVPGVYCLCVLYKGYVYTYRVSQ-TETGSWS 64
Query: 71 QQTCYKIGDKTFSDLPSLL-AFYKVHYLDTSPLIKPATK 108
+T + + F + +L+ AF K +PL P K
Sbjct: 65 AETAPGVHKRLFRKVKNLISAFQKPDQGIVTPLQYPVEK 103
>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 = 41.1 bits (96), Expect = 2e-05
Identities = 18/50 (36%), Positives = 32/50 (64%), Gaps = 1/50 (2%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A Y+++G +P DL F K DI+I+ + +E+W+ + ++G G P +VQ
Sbjct: 5 ALYNYEGKEPGDLKFSKGDIIILRRQVDENWYHGE-VNGIHGFFPTNFVQ 53
Score = 26.8 bits (59), Expect = 2.0
Identities = 15/38 (39%), Positives = 21/38 (55%), Gaps = 2/38 (5%)
Query: 224 LKLEIGDIIKVTKTNINGQW-EGELNGKTGHFPFTHVE 260
LK GDII + + ++ W GE+NG G FP V+
Sbjct: 17 LKFSKGDII-ILRRQVDENWYHGEVNGIHGFFPTNFVQ 53
>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 = 41.3 bits (97), Expect = 2e-05
Identities = 19/54 (35%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
KV A YDF+ + ++L FK +I+ V+ + +WW N GE G P +V
Sbjct: 2 KVRALYDFEAAEDNELTFKAGEIITVLDDSDPNWWKGSNHRGE-GLFPANFVTA 54
Score = 27.0 bits (60), Expect = 1.8
Identities = 11/38 (28%), Positives = 17/38 (44%)
Query: 218 AYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFP 255
A + L + G+II V + W+G + G FP
Sbjct: 11 AAEDNELTFKAGEIITVLDDSDPNWWKGSNHRGEGLFP 48
>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 = 42.7 bits (100), Expect = 2e-05
Identities = 26/91 (28%), Positives = 51/91 (56%), Gaps = 4/91 (4%)
Query: 8 HDRNSWYFGMMTRQEAQAILLSEKD-NGAFLVRDSNTILGNYVLCVKENNKVSHYIINKI 66
H W+ G ++R+E+ I+ + +G FL+RDS + +VL + + K+ ++ I
Sbjct: 2 HRTQHWFHGRISREESHRIIKQQGLVDGLFLLRDSQSNPKAFVLTLCHHQKIKNFQILPC 61
Query: 67 TNTEQQTCYKI--GDKTFSDLPSLLAFYKVH 95
+ + QT + + G+ FSDL L+ FY+++
Sbjct: 62 ED-DGQTFFSLDDGNTKFSDLIQLVDFYQLN 91
>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 = 42.8 bits (101), Expect = 2e-05
Identities = 21/41 (51%), Positives = 25/41 (60%), Gaps = 1/41 (2%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVK 53
WY ++R +A A LL +K G FLVRDS T G Y L VK
Sbjct: 5 WYKPNISRDQAIA-LLKDKPPGTFLVRDSTTYKGAYGLAVK 44
>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 = 42.3 bits (99), Expect = 2e-05
Identities = 25/94 (26%), Positives = 42/94 (44%), Gaps = 14/94 (14%)
Query: 12 SWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITN--- 68
WY G ++R EA++ L K+ ++LVR+S + Y + +K + H I+ + +
Sbjct: 2 PWYHGSISRAEAESRLQPCKE-ASYLVRNSESGNSKYSIALKTSQGCVHIIVAQTKDNKY 60
Query: 69 TEQQTCYKIGDKTFSDLPSLLAFYKVHYLDTSPL 102
T QT F +P + VHY L
Sbjct: 61 TLNQTS-----AVFDSIPEV-----VHYYSNEKL 84
>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 = 40.9 bits (95), Expect = 3e-05
Identities = 20/51 (39%), Positives = 30/51 (58%), Gaps = 1/51 (1%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNIS-GEVGSIPVPYV 163
+A YD++ DL FKK + L +V+ E WW A +++ G+ G IP YV
Sbjct: 3 VALYDYESRTETDLSFKKGERLQIVNNTEGDWWLAHSLTTGQTGYIPSNYV 53
>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 = 19/51 (37%), Positives = 30/51 (58%), Gaps = 1/51 (1%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNI-SGEVGSIPVPYV 163
+A YD++ DDL F K + +++ E WW A+++ +GE G IP YV
Sbjct: 4 VALYDYEARTEDDLSFHKGEKFQILNSSEGDWWEARSLTTGETGYIPSNYV 54
>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 = 41.9 bits (98), Expect = 3e-05
Identities = 16/65 (24%), Positives = 35/65 (53%), Gaps = 4/65 (6%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
Y G ++R+ + +LL+ +G++L+RDS ++ G Y LCV + + Y +++ +
Sbjct: 5 VYHGKISRETGEKLLLATGLDGSYLLRDSESVPGVYCLCVLYHGYIYTYRVSQ----TET 60
Query: 73 TCYKI 77
+
Sbjct: 61 GSWSA 65
>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 = 41.8 bits (98), Expect = 3e-05
Identities = 21/59 (35%), Positives = 31/59 (52%), Gaps = 2/59 (3%)
Query: 8 HDRNSWYFGMMTRQEAQAILLS-EKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINK 65
H+R WY G + R EA+ L S + +G FL+R+ G Y L + V HY I++
Sbjct: 7 HERMPWYHGSIARDEAERRLYSGAQPDGKFLLRERKE-SGTYALSLVYGKTVYHYRIDQ 64
>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 = 40.5 bits (95), Expect = 3e-05
Identities = 15/54 (27%), Positives = 27/54 (50%), Gaps = 6/54 (11%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTA------QNISGEVGSIPVPY 162
A YD++ D+L +++DIL ++ K ++ WW + VG +P Y
Sbjct: 4 ALYDYEPQTEDELTIQEDDILYLLEKSDDDWWKVKLKVNSSDDDEPVGLVPATY 57
>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 = 40.6 bits (95), Expect = 3e-05
Identities = 19/54 (35%), Positives = 33/54 (61%), Gaps = 2/54 (3%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNI-SGEVGSIPVPYVQK 165
V+A Y ++ + DL F+K + L ++ + E WW AQ++ +G+ G IP +V K
Sbjct: 2 VVALYSYEPSHDGDLGFEKGEKLRILEQSGE-WWKAQSLTTGQEGFIPFNFVAK 54
>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 = 40.6 bits (95), Expect = 3e-05
Identities = 15/36 (41%), Positives = 22/36 (61%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHV 259
L E G++I+V + G WEGE +G G FP ++V
Sbjct: 17 LSFEAGELIRVLQAPDGGWWEGEKDGLRGWFPASYV 52
>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 = 40.8 bits (95), Expect = 3e-05
Identities = 19/32 (59%), Positives = 21/32 (65%)
Query: 229 GDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
GDII VT+ G WEG LNGKTG FP +V
Sbjct: 23 GDIIYVTRVEEGGWWEGTLNGKTGWFPSNYVR 54
Score = 35.7 bits (82), Expect = 0.002
Identities = 17/54 (31%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQKY 166
V A+++F + D+L K DI+ V +E WW ++G+ G P YV++
Sbjct: 4 VKARFNFKQTNEDELSVCKGDIIYVTRVEEGGWWEG-TLNGKTGWFPSNYVREI 56
>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 = 40.3 bits (95), Expect = 3e-05
Identities = 15/54 (27%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
+ K++++ D+L +K D ++V+ K + WW + G+VG P YV +
Sbjct: 1 PAVVKFNYEAQREDELSLRKGDRVLVLEKSSDGWWRGECN-GQVGWFPSNYVTE 53
Score = 36.1 bits (84), Expect = 0.001
Identities = 15/37 (40%), Positives = 21/37 (56%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
L L GD + V + + +G W GE NG+ G FP +V
Sbjct: 16 LSLRKGDRVLVLEKSSDGWWRGECNGQVGWFPSNYVT 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 = 40.4 bits (94), Expect = 3e-05
Identities = 18/51 (35%), Positives = 30/51 (58%), Gaps = 1/51 (1%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
A YDF +L FKK D + ++ K +++W+ ++ G VG P+ YV+K
Sbjct: 5 AVYDFKAQTSKELSFKKGDTVYILRKIDQNWYEGEH-HGRVGIFPISYVEK 54
Score = 28.4 bits (63), Expect = 0.63
Identities = 12/37 (32%), Positives = 21/37 (56%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
L + GD + + + +EGE +G+ G FP ++VE
Sbjct: 17 LSFKKGDTVYILRKIDQNWYEGEHHGRVGIFPISYVE 53
>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 = 40.2 bits (94), Expect = 3e-05
Identities = 16/53 (30%), Positives = 29/53 (54%), Gaps = 1/53 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+V+A + ++ P+DL F++ D + V+S+ E W + G VG P +V
Sbjct: 1 QVVALHRYEAQGPEDLGFREGDTIDVLSEVNEAWLEGHS-DGRVGIFPKCFVV 52
Score = 27.5 bits (61), Expect = 1.4
Identities = 13/33 (39%), Positives = 17/33 (51%), Gaps = 2/33 (6%)
Query: 229 GDIIKVTKTNINGQW-EGELNGKTGHFPFTHVE 260
GD I V + +N W EG +G+ G FP V
Sbjct: 21 GDTIDVL-SEVNEAWLEGHSDGRVGIFPKCFVV 52
>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 = 40.3 bits (94), Expect = 3e-05
Identities = 21/54 (38%), Positives = 30/54 (55%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVS-KDEEHWWTAQNISGEVGSIPVPYVQ 164
+V A YD+ G +PD+L FK + L+ V +DE+ W G VG P YV+
Sbjct: 3 RVRAVYDYTGQEPDELSFKAGEELLKVEDEDEQGWCKGVTDGGAVGLYPANYVE 56
>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 = 40.2 bits (94), Expect = 4e-05
Identities = 17/54 (31%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
V+A YD+ P ++ KK DIL +++ + WW + + G +P YV+K
Sbjct: 1 CVVALYDYQEKSPREVSMKKGDILTLLNSSNKDWWKVEV-NDRQGFVPAAYVKK 53
>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 = 40.4 bits (95), Expect = 4e-05
Identities = 20/57 (35%), Positives = 29/57 (50%), Gaps = 10/57 (17%)
Query: 113 VIAKYDFDGNDPDDLP-----FKKNDILIVVSKDEEHWWTAQNIS-----GEVGSIP 159
V A +D+D + LP FK DIL V + ++ WW A+ ++ EVG IP
Sbjct: 2 VRALFDYDPSRDSGLPSQGLSFKFGDILHVTNASDDEWWQARRVTPNGEEEEVGVIP 58
>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 = 41.7 bits (98), Expect = 4e-05
Identities = 27/91 (29%), Positives = 44/91 (48%), Gaps = 8/91 (8%)
Query: 9 DRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCV------KENNKVSHYI 62
D+ WY + R +A+ +L E G F+VRDS+ G Y + + + N + HY
Sbjct: 4 DQYEWYNKNINRSKAEKLLRDEGKEGGFMVRDSSQP-GLYTVSLYTKAGGEGNPCIRHYH 62
Query: 63 INKITNTEQQTCYKIGDKTFSDLPSLLAFYK 93
I K TN + Y F+ +P L+ ++K
Sbjct: 63 I-KETNDSPKKYYLAEKHVFNSIPELIEYHK 92
>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 = 40.5 bits (95), Expect = 4e-05
Identities = 19/54 (35%), Positives = 31/54 (57%), Gaps = 6/54 (11%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKD-----EEHWWTAQNISGEVGSIPVPYV 163
A +D++ + D+L ++ D + V+SKD +E WWT + I+ VG P YV
Sbjct: 4 AVFDYEASAEDELTLRRGDRVEVLSKDSAVSGDEGWWTGK-INDRVGIFPSNYV 56
Score = 28.6 bits (64), Expect = 0.68
Identities = 15/51 (29%), Positives = 24/51 (47%), Gaps = 8/51 (15%)
Query: 219 YDKTA---LKLEIGDIIKVTKTNI-----NGQWEGELNGKTGHFPFTHVEF 261
Y+ +A L L GD ++V + G W G++N + G FP +V
Sbjct: 8 YEASAEDELTLRRGDRVEVLSKDSAVSGDEGWWTGKINDRVGIFPSNYVTS 58
>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 = 40.0 bits (94), Expect = 4e-05
Identities = 19/39 (48%), Positives = 24/39 (61%), Gaps = 2/39 (5%)
Query: 224 LKLEIGDIIKV-TKTNIN-GQWEGELNGKTGHFPFTHVE 260
L L GDI+ + +K + G W+GELNGK G FP VE
Sbjct: 16 LTLREGDIVTILSKDCEDKGWWKGELNGKRGVFPDNFVE 54
Score = 35.4 bits (82), Expect = 0.002
Identities = 14/45 (31%), Positives = 28/45 (62%), Gaps = 3/45 (6%)
Query: 117 YDFDGNDPDDLPFKKNDILIVVSKDEEH--WWTAQNISGEVGSIP 159
+D++ + D+L ++ DI+ ++SKD E WW + ++G+ G P
Sbjct: 6 FDYEAENEDELTLREGDIVTILSKDCEDKGWWKGE-LNGKRGVFP 49
>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 = 40.1 bits (93), Expect = 4e-05
Identities = 17/36 (47%), Positives = 21/36 (58%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHV 259
L GD+I VT+ G WEG NG+TG FP +V
Sbjct: 16 LSFSKGDVIHVTRVEEGGWWEGTHNGRTGWFPSNYV 51
Score = 38.1 bits (88), Expect = 2e-04
Identities = 18/53 (33%), Positives = 28/53 (52%), Gaps = 1/53 (1%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
V AK++F + D+L F K D++ V +E WW +G G P YV++
Sbjct: 2 VRAKFNFQQTNEDELSFSKGDVIHVTRVEEGGWWEG-THNGRTGWFPSNYVRE 53
>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 = 40.2 bits (94), Expect = 4e-05
Identities = 19/52 (36%), Positives = 35/52 (67%), Gaps = 2/52 (3%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVS-KDEEHWWTAQNISGEVGSIPVPYVQ 164
+A Y F + D+LPF+K DIL +++ +D+++W+ A+ + G G IP Y++
Sbjct: 3 VALYSFQATESDELPFQKGDILKILNMEDDQNWYKAE-LQGREGYIPKNYIK 53
>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 = 39.8 bits (93), Expect = 5e-05
Identities = 18/49 (36%), Positives = 29/49 (59%), Gaps = 2/49 (4%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
K+DF + D+L FKK D+L ++S D+ W ++GE G +P +V
Sbjct: 4 GKFDFTASGEDELSFKKGDVLKILSSDDI--WFKAELNGEEGYVPKNFV 50
>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 = 39.8 bits (93), Expect = 5e-05
Identities = 17/51 (33%), Positives = 27/51 (52%), Gaps = 1/51 (1%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
V A YDF+ + D+L F D++ V+ WW + + G++G P YV
Sbjct: 2 VRALYDFEALEDDELGFNSGDVIEVLDSSNPSWWKGR-LHGKLGLFPANYV 51
Score = 29.0 bits (65), Expect = 0.39
Identities = 17/47 (36%), Positives = 24/47 (51%), Gaps = 5/47 (10%)
Query: 219 YDKTA-----LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
YD A L GD+I+V ++ W+G L+GK G FP +V
Sbjct: 6 YDFEALEDDELGFNSGDVIEVLDSSNPSWWKGRLHGKLGLFPANYVA 52
>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 = 40.0 bits (94), Expect = 5e-05
Identities = 16/53 (30%), Positives = 28/53 (52%), Gaps = 1/53 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
K A Y F +L KK DI+ + + +++W+ ++ +G VG P YV+
Sbjct: 1 KARALYPFKAQSAKELSLKKGDIIYIRRQIDKNWYEGEH-NGRVGIFPASYVE 52
Score = 35.4 bits (82), Expect = 0.002
Identities = 19/44 (43%), Positives = 26/44 (59%), Gaps = 2/44 (4%)
Query: 218 AYDKTALKLEIGDIIKVTKTNINGQW-EGELNGKTGHFPFTHVE 260
A L L+ GDII + + I+ W EGE NG+ G FP ++VE
Sbjct: 10 AQSAKELSLKKGDIIYIRR-QIDKNWYEGEHNGRVGIFPASYVE 52
>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 = 41.2 bits (96), Expect = 5e-05
Identities = 26/91 (28%), Positives = 43/91 (47%), Gaps = 6/91 (6%)
Query: 7 PHDRNSWYFGMMTRQEAQAILLS--EKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIIN 64
P W+ GM++R +A ++L +G FLVR S T G YVL K H
Sbjct: 4 PLSGYPWFHGMLSRLKAAQLVLEGGTGSHGVFLVRQSETRRGEYVLTFNFQGKAKHL--- 60
Query: 65 KITNTEQQTCYKIGDKTFSDLPSLLAFYKVH 95
+++ E+ C ++ F + +L ++VH
Sbjct: 61 RLSLNEEGQC-RVQHLWFQSIFDMLEHFRVH 90
>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 = 41.2 bits (97), Expect = 5e-05
Identities = 17/49 (34%), Positives = 29/49 (59%), Gaps = 1/49 (2%)
Query: 12 SWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSH 60
WY+G M+ ++A+ +L ++ D G+FLVRDS+ + L + V H
Sbjct: 11 GWYWGPMSWEDAEKVLSNKPD-GSFLVRDSSDDRYIFSLSFRSQGSVHH 58
>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 = 39.7 bits (93), Expect = 6e-05
Identities = 15/53 (28%), Positives = 24/53 (45%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+ A YD+ D ++ F DI+ + + +E WW G G P YV+
Sbjct: 1 RARALYDYQAADDTEISFDPGDIITDIEQIDEGWWRGTGPDGTYGLFPANYVE 53
>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 = 39.6 bits (92), Expect = 6e-05
Identities = 20/52 (38%), Positives = 31/52 (59%), Gaps = 1/52 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
KV A YDF+ + ++L FK +I+IV+ + +WW +N G VG P +V
Sbjct: 3 KVRALYDFEAVEDNELTFKHGEIIIVLDDSDANWWKGENHRG-VGLFPSNFV 53
>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 = 41.0 bits (96), Expect = 7e-05
Identities = 16/32 (50%), Positives = 22/32 (68%), Gaps = 1/32 (3%)
Query: 10 RNSWYFGMMTRQEAQAILLSEKDNGAFLVRDS 41
+ WY+G +TR EA+ L + D G+FLVRDS
Sbjct: 9 KQGWYWGPITRWEAEGKLANVPD-GSFLVRDS 39
>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 = 41.0 bits (96), Expect = 7e-05
Identities = 19/52 (36%), Positives = 32/52 (61%), Gaps = 2/52 (3%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIIN 64
W+ G+++R+EA+A LL G+FLVR S I G Y L + + H++++
Sbjct: 9 WFHGIISREEAEA-LLMNATEGSFLVRVSEKIWG-YTLSYRLQSGFKHFLVD 58
>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 = 39.6 bits (92), Expect = 7e-05
Identities = 17/51 (33%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWT-AQNISGEVGSIPVPYVQ 164
A Y FDG++ L K+ ++L ++ +D+ WT A+ +GE G +P Y++
Sbjct: 5 ALYPFDGSNEGTLAMKEGEVLYIIEEDKGDGWTRARKQNGEEGYVPTSYIE 55
>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 = 39.6 bits (92), Expect = 7e-05
Identities = 17/51 (33%), Positives = 30/51 (58%), Gaps = 2/51 (3%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+A Y ++ N+ DL F++ D+++V KD + WWT + + G P YV+
Sbjct: 3 VAMYTYESNEQGDLTFQQGDVILVTKKDGD-WWTG-TVGDKTGVFPSNYVR 51
Score = 28.8 bits (64), Expect = 0.43
Identities = 15/36 (41%), Positives = 20/36 (55%), Gaps = 1/36 (2%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHV 259
L + GD+I VTK + W G + KTG FP +V
Sbjct: 16 LTFQQGDVILVTKKD-GDWWTGTVGDKTGVFPSNYV 50
>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 = 40.7 bits (95), Expect = 1e-04
Identities = 27/88 (30%), Positives = 45/88 (51%), Gaps = 12/88 (13%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNK------VSHYIINKI 66
WY +TR +A+ +L E GAF+VRDS LG+Y + V + + HY I K
Sbjct: 8 WYHKNITRNQAERLLRQESKEGAFIVRDSRH-LGSYTISVFTRARRSTEASIKHYQIKK- 65
Query: 67 TNTEQQTCYKIGDK-TFSDLPSLLAFYK 93
N Q + + ++ F +P L+ +++
Sbjct: 66 -NDSGQ--WYVAERHLFQSIPELIQYHQ 90
>gnl|CDD|212995 cd12062, SH3_Caskin1, Src Homology 3 domain of CASK interacting
protein 1. Caskin1 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 is expressed at high
levels in the brain and is localized in presynaptic
regions. It binds to the multidomain scaffolding protein
CASK through the CaMK 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.
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 = 39.2 bits (91), Expect = 1e-04
Identities = 19/52 (36%), Positives = 32/52 (61%), Gaps = 6/52 (11%)
Query: 217 NAYDKTALKLEIGDIIKVTKTNINGQWEGEL------NGKTGHFPFTHVEFI 262
N YD T+L ++ GD+I V + + +G+W+G + N + G+FP + VE I
Sbjct: 11 NNYDLTSLNIKAGDVITVLEQHPDGRWKGCIHDNRTGNDRVGYFPSSLVEAI 62
>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 = 39.2 bits (91), Expect = 1e-04
Identities = 15/50 (30%), Positives = 29/50 (58%), Gaps = 1/50 (2%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
AK+DF +LP +K DI+ + + +++W+ ++ G VG P Y++
Sbjct: 5 AKFDFKAQTLKELPLQKGDIVYIYKQIDQNWYEGEH-HGRVGIFPRSYIE 53
Score = 32.2 bits (73), Expect = 0.031
Identities = 14/39 (35%), Positives = 24/39 (61%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVEFI 262
L L+ GDI+ + K +EGE +G+ G FP +++E +
Sbjct: 17 LPLQKGDIVYIYKQIDQNWYEGEHHGRVGIFPRSYIELL 55
>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 = 39.3 bits (92), Expect = 1e-04
Identities = 22/60 (36%), Positives = 31/60 (51%), Gaps = 12/60 (20%)
Query: 113 VIAKYDFDGNDPDDL--------PFKKNDILIVVSKDEEHWWTAQNISGE---VGSIPVP 161
V A++D+D + DDL FK DIL ++SKD+ +WW A+ G IP P
Sbjct: 2 VRAQFDYDPSK-DDLIPCQQAGIAFKTGDILQIISKDDHNWWQARKPGASKEPAGLIPSP 60
>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 = 39.2 bits (92), Expect = 1e-04
Identities = 16/55 (29%), Positives = 26/55 (47%), Gaps = 4/55 (7%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEH----WWTAQNISGEVGSIPVPYVQ 164
A+YDF D+L F+ D L + K+ + W A ++G +P YV+
Sbjct: 3 RAEYDFVAESEDELSFRAGDKLRLAPKELQPRVRGWLLATVDGQKIGLVPANYVK 57
>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 = 40.2 bits (94), Expect = 1e-04
Identities = 27/86 (31%), Positives = 46/86 (53%), Gaps = 9/86 (10%)
Query: 13 WYFGMMTRQEAQAILLSEKD-NGAFLVRDSNTILGNYVLCVKENNK-----VSHYIINKI 66
W+F ++R +A+ LL+ + +G+FL+R+S T G++ L V++ ++ V HY KI
Sbjct: 5 WFFKNLSRNDAERQLLAPGNTHGSFLIRESETTAGSFSLSVRDFDQNQGEVVKHY---KI 61
Query: 67 TNTEQQTCYKIGDKTFSDLPSLLAFY 92
N + Y TF L L+ Y
Sbjct: 62 RNLDNGGFYISPRITFPGLHELVRHY 87
>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 = 38.9 bits (91), Expect = 1e-04
Identities = 18/50 (36%), Positives = 28/50 (56%), Gaps = 1/50 (2%)
Query: 117 YDFDGNDPDDLPFKKNDILIVVSK-DEEHWWTAQNISGEVGSIPVPYVQK 165
Y ++ PD+L + + L V+ D + W A+N SGEVG +P Y+Q
Sbjct: 8 YSYEAQRPDELTITEGEELEVIEDGDGDGWVKARNKSGEVGYVPENYLQF 57
>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 = 38.6 bits (90), Expect = 1e-04
Identities = 16/51 (31%), Positives = 26/51 (50%), Gaps = 1/51 (1%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+A YD+ D D++ F +DI+ + +E WW G+ G P YV+
Sbjct: 3 VALYDYQAADDDEISFDPDDIITNIEMIDEGWWRGV-CRGKYGLFPANYVE 52
Score = 29.7 bits (67), Expect = 0.22
Identities = 18/47 (38%), Positives = 21/47 (44%), Gaps = 8/47 (17%)
Query: 218 AYDKTALKLEIGDIIKVTKTNI----NGQWEGELNGKTGHFPFTHVE 260
A D + + DII TNI G W G GK G FP +VE
Sbjct: 10 AADDDEISFDPDDII----TNIEMIDEGWWRGVCRGKYGLFPANYVE 52
>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 = 38.6 bits (89), Expect = 2e-04
Identities = 18/53 (33%), Positives = 30/53 (56%), Gaps = 1/53 (1%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
VIAK+D+ +L KKN+ L ++ D + WW +N + G +P YV++
Sbjct: 6 VIAKWDYTAQQDQELDIKKNERLWLLD-DSKTWWRVRNAANRTGYVPSNYVER 57
>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 = 38.5 bits (89), Expect = 2e-04
Identities = 18/58 (31%), Positives = 34/58 (58%), Gaps = 1/58 (1%)
Query: 110 IEKVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQKYS 167
+EKV+A YD+ + D+L F++ I+ V+ K+++ W+ ++G G P YV+
Sbjct: 2 LEKVVAIYDYTKDKEDELSFQEGAIIYVIKKNDDGWYEGV-MNGVTGLFPGNYVESIM 58
Score = 35.8 bits (82), Expect = 0.002
Identities = 19/39 (48%), Positives = 24/39 (61%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVEFI 262
L + G II V K N +G +EG +NG TG FP +VE I
Sbjct: 19 LSFQEGAIIYVIKKNDDGWYEGVMNGVTGLFPGNYVESI 57
>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 = 38.4 bits (89), Expect = 2e-04
Identities = 20/46 (43%), Positives = 28/46 (60%), Gaps = 2/46 (4%)
Query: 215 VPNAYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
VP D+ L+L++GDII + + G W G LNGK+G FP V+
Sbjct: 10 VPQNEDE--LELKVGDIIDINEEVEEGWWSGTLNGKSGLFPSNFVK 53
Score = 30.3 bits (68), Expect = 0.12
Identities = 13/49 (26%), Positives = 27/49 (55%), Gaps = 1/49 (2%)
Query: 117 YDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
+++ + D+L K DI+ + + EE WW+ +G+ G P +V++
Sbjct: 7 FEYVPQNEDELELKVGDIIDINEEVEEGWWSGTL-NGKSGLFPSNFVKE 54
>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 = 38.2 bits (89), Expect = 2e-04
Identities = 14/50 (28%), Positives = 25/50 (50%), Gaps = 1/50 (2%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPY 162
+A YDF G +DL F++ D ++V + W + ++G G P +
Sbjct: 2 AVALYDFTGETEEDLSFQRGDRILVTEHLDAEWSRGR-LNGREGIFPRAF 50
Score = 27.8 bits (62), Expect = 0.98
Identities = 17/43 (39%), Positives = 24/43 (55%), Gaps = 7/43 (16%)
Query: 219 YDKTA-----LKLEIGDIIKVTKTNINGQW-EGELNGKTGHFP 255
YD T L + GD I VT+ +++ +W G LNG+ G FP
Sbjct: 6 YDFTGETEEDLSFQRGDRILVTE-HLDAEWSRGRLNGREGIFP 47
>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 = 38.5 bits (89), Expect = 2e-04
Identities = 18/53 (33%), Positives = 31/53 (58%), Gaps = 2/53 (3%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEE--HWWTAQNISGEVGSIPVPYV 163
V A Y F ++ ++L F+K +++ V+ K E WW + +G+VG +P YV
Sbjct: 3 VQALYPFSSSNDEELNFEKGEVMDVIEKPENDPEWWKCRKANGQVGLVPKNYV 55
>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 = 38.4 bits (89), Expect = 2e-04
Identities = 17/50 (34%), Positives = 28/50 (56%), Gaps = 4/50 (8%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSK---DEEHWWTAQNISGEVGSIP 159
V A +D++G D+L FK+ D + ++ + DE WW A+ E G +P
Sbjct: 3 VYALWDYEGESDDELSFKEGDCMTILRREDEDETEWWWARLNDKE-GYVP 51
>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 = 38.0 bits (88), Expect = 2e-04
Identities = 16/51 (31%), Positives = 28/51 (54%), Gaps = 1/51 (1%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVS-KDEEHWWTAQNISGEVGSIPVPYVQ 164
A YDF +P ++ +++++L + S +D E W N G+ G P YV+
Sbjct: 4 ALYDFRSENPGEISLREHEVLSLCSEQDIEGWLEGVNSRGDRGLFPASYVE 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 = 37.8 bits (88), Expect = 2e-04
Identities = 16/39 (41%), Positives = 22/39 (56%)
Query: 218 AYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPF 256
A + L E+GD I++ T +G EGEL G+ G FP
Sbjct: 10 ALEPNELDFEVGDRIRIIATLEDGWLEGELKGRRGIFPH 48
>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 = 38.2 bits (89), Expect = 2e-04
Identities = 14/50 (28%), Positives = 30/50 (60%), Gaps = 1/50 (2%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
+A++DF+G D+L F + D++ + E W + ++G++G P+ +V
Sbjct: 3 VARFDFEGEQEDELSFSEGDVITLKEYVGEEWAKGE-LNGKIGIFPLNFV 51
Score = 32.4 bits (74), Expect = 0.021
Identities = 16/37 (43%), Positives = 21/37 (56%), Gaps = 2/37 (5%)
Query: 224 LKLEIGDIIKVTKTNINGQW-EGELNGKTGHFPFTHV 259
L GD+I + K + +W +GELNGK G FP V
Sbjct: 16 LSFSEGDVITL-KEYVGEEWAKGELNGKIGIFPLNFV 51
>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 = 38.1 bits (89), Expect = 2e-04
Identities = 17/53 (32%), Positives = 24/53 (45%), Gaps = 1/53 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A Y + + L F K DI+ V+ + E WW + GE G P YV+
Sbjct: 1 TATALYPWRAKKENHLSFAKGDIITVLEQQEM-WWFGELEGGEEGWFPKSYVK 52
>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 = 38.1 bits (88), Expect = 2e-04
Identities = 18/45 (40%), Positives = 25/45 (55%), Gaps = 2/45 (4%)
Query: 218 AYDKTALKLEIGDIIKVTKT--NINGQWEGELNGKTGHFPFTHVE 260
A D L L GD++++ G W+GE NG+ G FP T+VE
Sbjct: 11 ARDMRELSLREGDVVRIYSRIGGDQGWWKGETNGRIGWFPSTYVE 55
Score = 35.0 bits (80), Expect = 0.003
Identities = 14/54 (25%), Positives = 31/54 (57%), Gaps = 3/54 (5%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSK--DEEHWWTAQNISGEVGSIPVPYVQK 165
+A+Y+F D +L ++ D++ + S+ ++ WW + +G +G P YV++
Sbjct: 4 VARYNFAARDMRELSLREGDVVRIYSRIGGDQGWWKGET-NGRIGWFPSTYVEE 56
>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 = 38.0 bits (88), Expect = 2e-04
Identities = 17/53 (32%), Positives = 30/53 (56%), Gaps = 3/53 (5%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISG--EVGSIPVPYVQ 164
+A+Y F G+ +L F+K + + ++ K E+W+ + I+G G P YVQ
Sbjct: 4 VAQYTFKGDLEVELSFRKGEHICLIRKVNENWYEGR-ITGTGRQGIFPASYVQ 55
>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 = 37.7 bits (88), Expect = 3e-04
Identities = 16/53 (30%), Positives = 26/53 (49%), Gaps = 1/53 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A +D DP++L FK D++ V+ ++ WW I E G P +V+
Sbjct: 1 LAEALWDHVTMDPEELGFKAGDVIEVLDMSDKDWWWGS-IRDEEGWFPASFVR 52
Score = 31.2 bits (71), Expect = 0.068
Identities = 12/43 (27%), Positives = 19/43 (44%)
Query: 217 NAYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHV 259
D L + GD+I+V + W G + + G FP + V
Sbjct: 9 VTMDPEELGFKAGDVIEVLDMSDKDWWWGSIRDEEGWFPASFV 51
>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 = 38.0 bits (88), Expect = 3e-04
Identities = 16/49 (32%), Positives = 29/49 (59%), Gaps = 3/49 (6%)
Query: 117 YDFDGNDPDDLPFKKNDILIVVSKDEEH--WWTAQNISGEVGSIPVPYV 163
+D G+ PD+L FK+ D + ++SK+ WW + + G +G +P Y+
Sbjct: 6 WDCTGDQPDELSFKRGDTIYILSKEYNRFGWWVGE-MKGTIGLVPKAYI 53
>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 = 38.6 bits (90), Expect = 3e-04
Identities = 23/91 (25%), Positives = 37/91 (40%), Gaps = 12/91 (13%)
Query: 9 DRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKI-- 66
+ WY+G +T EA L + G FLVRDS+ L VK ++ I
Sbjct: 2 RESGWYWGSITASEAHQALQ-KAPEGTFLVRDSSHPSYMLTLSVKTTRGPTNVRIEYSDG 60
Query: 67 -----TNTEQQTCYKIGDKTFSDLPSLLAFY 92
+++ + +F D+ SL+ Y
Sbjct: 61 SFRLDSSSLARPRL----LSFPDVVSLVQHY 87
>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 = 37.7 bits (87), Expect = 3e-04
Identities = 22/54 (40%), Positives = 33/54 (61%), Gaps = 7/54 (12%)
Query: 115 AKYDFDGNDP----DDLPFKKNDILIVVSKDEEHWWTAQNISGE-VGSIPVPYV 163
A YDF+ D D LPF K+DIL V+ + +E+W A+ + G+ +G P+ YV
Sbjct: 4 ALYDFEVKDKEADKDCLPFAKDDILTVIRRVDENW--AEGMLGDKIGIFPISYV 55
>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 = 38.0 bits (88), Expect = 3e-04
Identities = 19/56 (33%), Positives = 34/56 (60%), Gaps = 4/56 (7%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEV---GSIPVPYVQ 164
+V A Y+ ++PD+L F + +I+IV ++++ WW +I GE G+ PV +V
Sbjct: 1 RVKALYNCVADNPDELTFSEGEIIIVDGEEDKEWWIG-HIDGEPTRRGAFPVSFVH 55
>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 = 37.9 bits (88), Expect = 3e-04
Identities = 19/50 (38%), Positives = 30/50 (60%), Gaps = 6/50 (12%)
Query: 217 NAYDKTALKLEIGDIIKVTKTNINGQWEGEL------NGKTGHFPFTHVE 260
N +D TAL + GDII V + + +G+W+G + N + G+FP + VE
Sbjct: 11 NNHDLTALNVRAGDIITVLEQHPDGRWKGHIHDNQTGNDRVGYFPPSLVE 60
>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 = 37.8 bits (87), Expect = 3e-04
Identities = 17/53 (32%), Positives = 30/53 (56%), Gaps = 1/53 (1%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
V+AK+D+ +L KKN+ L ++ D + WW +N + G +P YV++
Sbjct: 5 VVAKFDYVAQQDQELDIKKNERLWLLD-DSKSWWRVRNAMNKTGFVPSNYVER 56
>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 = 37.3 bits (87), Expect = 5e-04
Identities = 19/55 (34%), Positives = 30/55 (54%), Gaps = 5/55 (9%)
Query: 212 QVRVPNAYDKT---ALKLEIGDIIKVTKTNINGQWEGE--LNGKTGHFPFTHVEF 261
QV+ +AY L LE GD++ V + +G +EGE +G+ G FP ++ E
Sbjct: 1 QVQCVHAYTAQQPDELTLEEGDVVNVLRKMPDGWYEGERLRDGERGWFPSSYTEE 55
Score = 30.0 bits (68), Expect = 0.18
Identities = 13/53 (24%), Positives = 26/53 (49%), Gaps = 1/53 (1%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNIS-GEVGSIPVPYVQ 164
V + + PD+L ++ D++ V+ K + W+ + + GE G P Y +
Sbjct: 2 VQCVHAYTAQQPDELTLEEGDVVNVLRKMPDGWYEGERLRDGERGWFPSSYTE 54
>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 = 36.9 bits (85), Expect = 6e-04
Identities = 17/52 (32%), Positives = 28/52 (53%), Gaps = 1/52 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
KV A YDF+ + ++L FK DI+ ++ + +WW + G G P +V
Sbjct: 2 KVRAIYDFEAAEDNELTFKAGDIITILDDSDPNWWKGETPQG-TGLFPSNFV 52
Score = 25.7 bits (56), Expect = 6.1
Identities = 14/42 (33%), Positives = 19/42 (45%)
Query: 218 AYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHV 259
A + L + GDII + + W+GE TG FP V
Sbjct: 11 AAEDNELTFKAGDIITILDDSDPNWWKGETPQGTGLFPSNFV 52
>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 = 36.8 bits (85), Expect = 6e-04
Identities = 15/32 (46%), Positives = 20/32 (62%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFP 255
L + +GDII K + G WEGE+ G+ G FP
Sbjct: 16 LTITVGDIITKIKKDDGGWWEGEIKGRRGLFP 47
Score = 33.3 bits (76), Expect = 0.011
Identities = 15/52 (28%), Positives = 26/52 (50%), Gaps = 1/52 (1%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
I ++D+ D+L DI+ + KD+ WW + I G G P +V++
Sbjct: 3 IVEFDYKAQHEDELTITVGDIITKIKKDDGGWWEGE-IKGRRGLFPDNFVRE 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 = 36.5 bits (85), Expect = 7e-04
Identities = 15/55 (27%), Positives = 29/55 (52%), Gaps = 1/55 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNI-SGEVGSIPVPYVQK 165
+ A YD+ D D++ F++ D++I V ++ W +G+ G +P YV+
Sbjct: 1 RYRAMYDYAAADDDEVSFQEGDVIINVEIIDDGWMEGTVQRTGQSGMLPANYVEL 55
>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 = 36.7 bits (85), Expect = 7e-04
Identities = 14/51 (27%), Positives = 23/51 (45%), Gaps = 1/51 (1%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+A YD+ G D++ F + + + +E WW G G P YV+
Sbjct: 4 VALYDYQGEGDDEISFDPQETITDIEMVDEGWWKGT-CHGHRGLFPANYVE 53
>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 = 36.9 bits (85), Expect = 7e-04
Identities = 18/52 (34%), Positives = 31/52 (59%), Gaps = 6/52 (11%)
Query: 217 NAYDKTALKLEIGDIIKVTKTNINGQWEGELN------GKTGHFPFTHVEFI 262
N +D TAL + GD+I V + + +G+W+G ++ + G+FP + VE I
Sbjct: 11 NLHDPTALNVRAGDVITVLEQHPDGRWKGHIHDSQRGTDRVGYFPPSIVEVI 62
>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 = 36.6 bits (85), Expect = 8e-04
Identities = 16/36 (44%), Positives = 21/36 (58%), Gaps = 4/36 (11%)
Query: 229 GDIIKVTKTNIN----GQWEGELNGKTGHFPFTHVE 260
G II++ + + N G WEGE NG+ G FP VE
Sbjct: 21 GAIIRILRKDDNGVDDGWWEGEFNGRVGVFPSLVVE 56
Score = 33.1 bits (76), Expect = 0.014
Identities = 14/49 (28%), Positives = 26/49 (53%), Gaps = 5/49 (10%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDE----EHWWTAQNISGEVGSIP 159
A YD++ ++L F + I+ ++ KD+ + WW + +G VG P
Sbjct: 4 ALYDYEAQSDEELSFPEGAIIRILRKDDNGVDDGWWEGE-FNGRVGVFP 51
>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 = 36.9 bits (85), Expect = 8e-04
Identities = 14/25 (56%), Positives = 19/25 (76%)
Query: 127 LPFKKNDILIVVSKDEEHWWTAQNI 151
LPFK+ DIL VVS+D+ WW A+ +
Sbjct: 23 LPFKRRDILEVVSQDDPTWWQAKRV 47
>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 = 36.1 bits (84), Expect = 0.001
Identities = 15/53 (28%), Positives = 23/53 (43%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+ A Y D +L F+ I+ V +E W ++G G IP YV+
Sbjct: 1 RARALYACKAEDESELSFEPGQIITNVQPSDEPGWLEGTLNGRTGLIPENYVE 53
Score = 35.7 bits (83), Expect = 0.001
Identities = 20/45 (44%), Positives = 26/45 (57%), Gaps = 1/45 (2%)
Query: 218 AYDKTALKLEIGDIIK-VTKTNINGQWEGELNGKTGHFPFTHVEF 261
A D++ L E G II V ++ G EG LNG+TG P +VEF
Sbjct: 10 AEDESELSFEPGQIITNVQPSDEPGWLEGTLNGRTGLIPENYVEF 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 = 37.3 bits (86), Expect = 0.001
Identities = 26/85 (30%), Positives = 44/85 (51%), Gaps = 8/85 (9%)
Query: 13 WYFGMMTRQEAQAILLSEKDN-GAFLVRDSNTILGNYVLCVK----ENNKVSHYIINKIT 67
W+F ++R++A+ LL+ + G+FL+R+S + G + L VK + V HY KI
Sbjct: 5 WFFRTISRKDAERQLLAPMNKAGSFLIRESESNKGAFSLSVKDVTTQGEVVKHY---KIR 61
Query: 68 NTEQQTCYKIGDKTFSDLPSLLAFY 92
+ + Y TF L +L+ Y
Sbjct: 62 SLDNGGYYISPRITFPTLQALVQHY 86
>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 = 36.0 bits (83), Expect = 0.001
Identities = 16/49 (32%), Positives = 32/49 (65%), Gaps = 3/49 (6%)
Query: 117 YDFDGNDPDDLPFKKNDILIVVSKDEEH--WWTAQNISGEVGSIPVPYV 163
+D G++PD+L F++ D++ ++SK+ WW + ++G VG +P Y+
Sbjct: 6 WDCFGDNPDELSFQRGDLIYILSKEYNMYGWWVGE-LNGIVGIVPKDYL 53
Score = 27.9 bits (62), Expect = 1.1
Identities = 14/34 (41%), Positives = 18/34 (52%), Gaps = 2/34 (5%)
Query: 224 LKLEIGDIIKVTKT--NINGQWEGELNGKTGHFP 255
L + GD+I + N+ G W GELNG G P
Sbjct: 16 LSFQRGDLIYILSKEYNMYGWWVGELNGIVGIVP 49
>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 = 36.1 bits (83), Expect = 0.001
Identities = 19/52 (36%), Positives = 29/52 (55%), Gaps = 3/52 (5%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKD--EEHWWTAQNISGEVGSIPVPY 162
V A +D+ PD+L FK+ D++ V+ KD WW A ++ G G +P Y
Sbjct: 3 VYALWDYSAEFPDELSFKEGDMVTVLRKDGEGTDWWWA-SLCGREGYVPRNY 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 = 35.8 bits (82), Expect = 0.001
Identities = 19/51 (37%), Positives = 27/51 (52%), Gaps = 2/51 (3%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
IA Y + ++P DL F + + ++V KD E WWT I G P YV+
Sbjct: 3 IALYPYSSSEPGDLTFNEGEEILVTQKDGE-WWTGS-IEDRTGIFPSNYVR 51
>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 = 37.2 bits (86), Expect = 0.001
Identities = 25/91 (27%), Positives = 48/91 (52%), Gaps = 10/91 (10%)
Query: 9 DRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNY---VLCVKENNK---VSHYI 62
D W+ G ++R +++ +L + GAF+VR+S+ + G Y + N+K V HY
Sbjct: 4 DAYDWFAGNISRSQSEQLLRQKGKEGAFMVRNSSQV-GMYTVSLFSKAVNDKKGTVKHYH 62
Query: 63 INKITNTEQQTCYKIGDKTFSDLPSLLAFYK 93
++ TN E + Y + F +P L+ +++
Sbjct: 63 VH--TNAENKL-YLAENYCFDSIPKLIHYHQ 90
>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 = 35.9 bits (83), Expect = 0.001
Identities = 15/52 (28%), Positives = 25/52 (48%), Gaps = 1/52 (1%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
+A Y F + +DL + D + ++ E WW + I VG P +VQ+
Sbjct: 3 VALYKFKPQENEDLEMRPGDKITLLDDSNEDWWKGK-IEDRVGFFPANFVQR 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 = 0.001
Identities = 18/39 (46%), Positives = 25/39 (64%), Gaps = 2/39 (5%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGEL--NGKTGHFPFTHVE 260
L+L+ GDI+ V K +G ++G L GKTG FP + VE
Sbjct: 16 LELKEGDIVFVHKKREDGWFKGTLQRTGKTGLFPGSFVE 54
>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 = 35.7 bits (83), Expect = 0.002
Identities = 10/52 (19%), Positives = 28/52 (53%), Gaps = 1/52 (1%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
+A D++ D++ ++ +++ V+ K++ WW + + G +P Y++
Sbjct: 3 VAIADYEAQGDDEISLQEGEVVEVLEKNDSGWWYVR-KGDKEGWVPASYLEP 53
Score = 28.0 bits (63), Expect = 0.78
Identities = 10/41 (24%), Positives = 21/41 (51%)
Query: 220 DKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
+ L+ G++++V + N +G W K G P +++E
Sbjct: 12 GDDEISLQEGEVVEVLEKNDSGWWYVRKGDKEGWVPASYLE 52
>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 = 35.6 bits (82), Expect = 0.002
Identities = 17/40 (42%), Positives = 24/40 (60%), Gaps = 1/40 (2%)
Query: 217 NAYDKTALKLEIGDIIK-VTKTNINGQWEGELNGKTGHFP 255
+A + L + +G+II+ V K G EGELNG+ G FP
Sbjct: 9 DAVHEDELTIRVGEIIRNVKKLEEEGWLEGELNGRRGMFP 48
Score = 33.7 bits (77), Expect = 0.010
Identities = 16/54 (29%), Positives = 28/54 (51%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
+ I +YD+D D+L + +I+ V K EE W ++G G P +V++
Sbjct: 1 EYIVEYDYDAVHEDELTIRVGEIIRNVKKLEEEGWLEGELNGRRGMFPDNFVKE 54
>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 = 35.4 bits (82), Expect = 0.002
Identities = 17/54 (31%), Positives = 28/54 (51%), Gaps = 4/54 (7%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEH---WWTAQN-ISGEVGSIPVPY 162
+I +DF+ D+L K D + ++ DEE W+ +N +GE G PV +
Sbjct: 2 LIVIHDFNARSEDELTLKPGDKIELIEDDEEFGDGWYLGRNLRTGETGLFPVVF 55
>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 = 35.7 bits (82), Expect = 0.002
Identities = 15/50 (30%), Positives = 30/50 (60%), Gaps = 1/50 (2%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A ++ G++P DL F K D++++ + +E+W+ + I+G G P V+
Sbjct: 5 ALCNYRGHNPGDLKFNKGDVILLRRQLDENWYLGE-INGVSGIFPASSVE 53
Score = 28.0 bits (62), Expect = 1.00
Identities = 14/37 (37%), Positives = 21/37 (56%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
LK GD+I + + + GE+NG +G FP + VE
Sbjct: 17 LKFNKGDVILLRRQLDENWYLGEINGVSGIFPASSVE 53
>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 = 35.6 bits (82), Expect = 0.002
Identities = 12/26 (46%), Positives = 19/26 (73%)
Query: 127 LPFKKNDILIVVSKDEEHWWTAQNIS 152
LPF+K DIL +V +++ WW A+ +S
Sbjct: 23 LPFRKGDILQIVDQNDSLWWQARKLS 48
>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 = 35.4 bits (82), Expect = 0.002
Identities = 18/52 (34%), Positives = 27/52 (51%), Gaps = 1/52 (1%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDE-EHWWTAQNISGEVGSIPVPYVQK 165
A Y F+ +PD++ F+ DI+ V E W A + G+ G P YV+K
Sbjct: 4 ALYAFEARNPDEISFQPGDIIQVDESQVAEPGWLAGELKGKTGWFPANYVEK 55
Score = 32.7 bits (75), Expect = 0.021
Identities = 17/39 (43%), Positives = 24/39 (61%), Gaps = 2/39 (5%)
Query: 224 LKLEIGDIIKVTKTNIN--GQWEGELNGKTGHFPFTHVE 260
+ + GDII+V ++ + G GEL GKTG FP +VE
Sbjct: 16 ISFQPGDIIQVDESQVAEPGWLAGELKGKTGWFPANYVE 54
>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 = 35.4 bits (82), Expect = 0.002
Identities = 14/58 (24%), Positives = 28/58 (48%), Gaps = 4/58 (6%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNI--SGEV--GSIPVPYVQK 165
KV A Y ++ + DDL F ++ V +++ W+ + + +G G P +V+
Sbjct: 3 KVKALYPYESDHEDDLNFDVGQLITVTEEEDADWYFGEYVDSNGNTKEGIFPKNFVEV 60
>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 = 35.3 bits (81), Expect = 0.002
Identities = 16/54 (29%), Positives = 30/54 (55%), Gaps = 6/54 (11%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKD-----EEHWWTAQNISGEVGSIPVPYV 163
A YD++ + D+L ++ D++ V+S+D ++ WW + I +G P YV
Sbjct: 4 ALYDYEASGEDELSLRRGDVVEVLSQDAAVSGDDGWWAGK-IRHRLGIFPANYV 56
>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 = 36.2 bits (83), Expect = 0.002
Identities = 23/85 (27%), Positives = 42/85 (49%), Gaps = 4/85 (4%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
WY G ++R +A+ +L K+ ++LVR+S T +Y L +K N H K+ T+++
Sbjct: 3 WYHGAISRGDAENLLRLCKE-CSYLVRNSQTSKHDYSLSLKSNQGFMHM---KLAKTKEK 58
Query: 73 TCYKIGDKTFSDLPSLLAFYKVHYL 97
F +P ++ +Y L
Sbjct: 59 YVLGQNSPPFDSVPEVIHYYTTRKL 83
>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 = 36.2 bits (84), Expect = 0.003
Identities = 22/64 (34%), Positives = 33/64 (51%), Gaps = 5/64 (7%)
Query: 13 WYFGMMTRQEA-QAILLSEKD-NGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTE 70
W+ G ++R +A Q +L S D +G FLVR S T G +VL + H ++T E
Sbjct: 10 WFHGTLSRSDAAQLVLHSGADGHGVFLVRQSETRRGEFVLTFNFQGRAKHL---RLTLNE 66
Query: 71 QQTC 74
+ C
Sbjct: 67 KGQC 70
>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 = 35.0 bits (81), Expect = 0.003
Identities = 17/53 (32%), Positives = 26/53 (49%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
V A YD+ PD+L F K+ I+ V K++ WW + P YV++
Sbjct: 2 VKALYDYRAQRPDELSFCKHAIITNVEKEDGGWWRGDYGGKKQKWFPANYVEE 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 = 34.8 bits (80), Expect = 0.003
Identities = 12/54 (22%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
+++A++D+ P+DL F + D + ++S+ + W + G +G P + +
Sbjct: 1 RMVAQHDYSAQGPEDLEFSQGDTIDILSEVNQEWLEG-HCDGRIGIFPKCFAVR 53
Score = 28.2 bits (63), Expect = 0.61
Identities = 12/33 (36%), Positives = 19/33 (57%), Gaps = 2/33 (6%)
Query: 224 LKLEIGDIIKVTKTNINGQW-EGELNGKTGHFP 255
L+ GD I + + +N +W EG +G+ G FP
Sbjct: 16 LEFSQGDTIDIL-SEVNQEWLEGHCDGRIGIFP 47
>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 = 34.6 bits (79), Expect = 0.003
Identities = 20/53 (37%), Positives = 27/53 (50%), Gaps = 1/53 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+V+A D+ + L F K D L V+ WW A N + E+G IP YVQ
Sbjct: 1 EVVAIKDYCPTNFTTLKFSKGDHLYVLDTSGGEWWYAHNTT-EMGYIPSSYVQ 52
>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 = 34.6 bits (80), Expect = 0.003
Identities = 15/55 (27%), Positives = 28/55 (50%), Gaps = 3/55 (5%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEE--HWWTAQNI-SGEVGSIPVPYV 163
AK DF+G +P +L F++ D + ++ W+ ++ SG VG +P +
Sbjct: 1 SCTAKMDFEGVEPGELSFRQGDSIEIIGDLIPGLQWFVGRSKSSGRVGFVPTNHF 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 = 35.1 bits (81), Expect = 0.004
Identities = 17/46 (36%), Positives = 26/46 (56%), Gaps = 13/46 (28%)
Query: 113 VIAKYDFDGNDPDD----------LPFKKNDILIVVSKDEEHWWTA 148
V A +D+D P+D L F+K DIL V+S+++ +WW A
Sbjct: 2 VRAHFDYD---PEDDPYIPCRELGLSFQKGDILHVISQEDPNWWQA 44
>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 = 34.5 bits (79), Expect = 0.004
Identities = 19/47 (40%), Positives = 30/47 (63%), Gaps = 2/47 (4%)
Query: 218 AYDKTALKLEIGDIIKV-TKTNIN-GQWEGELNGKTGHFPFTHVEFI 262
A ++ L ++ GDI+ + +K I+ G WEGELNG+ G FP V+ +
Sbjct: 10 AQNEDELTIKEGDIVTLISKDCIDAGWWEGELNGRRGVFPDNFVKLL 56
Score = 29.5 bits (66), Expect = 0.27
Identities = 16/55 (29%), Positives = 32/55 (58%), Gaps = 5/55 (9%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKD--EEHWWTAQNISGEVGSIPVPYVQ 164
KV+ + ++ + D+L K+ DI+ ++SKD + WW + ++G G P +V+
Sbjct: 3 KVL--FPYEAQNEDELTIKEGDIVTLISKDCIDAGWWEGE-LNGRRGVFPDNFVK 54
>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 = 34.6 bits (79), Expect = 0.004
Identities = 18/52 (34%), Positives = 28/52 (53%), Gaps = 3/52 (5%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWW--TAQNISGEVGSIPVPYVQ 164
A YD+ D D++ FK D ++ V +E W T Q +G+ G +P YV+
Sbjct: 6 AMYDYRAADDDEVSFKDGDTIVNVQTIDEGWMYGTVQR-TGKTGMLPANYVE 56
>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 = 34.5 bits (79), Expect = 0.004
Identities = 17/52 (32%), Positives = 26/52 (50%), Gaps = 1/52 (1%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
+A Y F + +DLP + D ++VV E WW + VG P +VQ+
Sbjct: 3 VALYKFLPQENNDLPLQPGDRVMVVDDSNEDWWKGK-SGDRVGFFPANFVQR 53
Score = 27.2 bits (60), Expect = 1.6
Identities = 11/41 (26%), Positives = 19/41 (46%)
Query: 220 DKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
+ L L+ GD + V + W+G+ + G FP V+
Sbjct: 12 ENNDLPLQPGDRVMVVDDSNEDWWKGKSGDRVGFFPANFVQ 52
>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 = 35.7 bits (82), Expect = 0.005
Identities = 18/52 (34%), Positives = 29/52 (55%), Gaps = 2/52 (3%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIIN 64
W+ G++T ++A +LLS G+FL+R S I G Y L H++I+
Sbjct: 9 WFHGILTLKKANELLLSTM-PGSFLIRVSEKIKG-YALSYLSEEGCKHFLID 58
>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 = 34.2 bits (78), Expect = 0.005
Identities = 16/55 (29%), Positives = 28/55 (50%), Gaps = 1/55 (1%)
Query: 111 EKVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
EK Y + D D++ +K ++ V+ K+ E WW + G+ G P Y++K
Sbjct: 1 EKYTVIYPYTARDQDEINLEKGAVVEVIQKNLEGWWKIR-YQGKEGWAPASYLKK 54
>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 = 34.7 bits (79), Expect = 0.005
Identities = 21/57 (36%), Positives = 29/57 (50%), Gaps = 10/57 (17%)
Query: 113 VIAKYDFDGNDPDDLP-----FKKNDILIVVSKDEEHWWTAQNI-----SGEVGSIP 159
V A +D+D LP FK DIL VV+ ++ WW A+ + S E+G IP
Sbjct: 5 VRALFDYDKTKDSGLPSQGLNFKFGDILHVVNASDDEWWQARQVTADGESEEIGVIP 61
>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 = 34.2 bits (78), Expect = 0.006
Identities = 15/44 (34%), Positives = 26/44 (59%), Gaps = 7/44 (15%)
Query: 113 VIAKYDFDGNDPDDLP-------FKKNDILIVVSKDEEHWWTAQ 149
+ A +D++ N+ +P FKK DIL ++S+D+ WW A+
Sbjct: 2 IKALFDYNPNEDKAIPCKEAGLSFKKGDILQIMSQDDATWWQAK 45
>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 = 34.0 bits (78), Expect = 0.006
Identities = 15/34 (44%), Positives = 20/34 (58%), Gaps = 2/34 (5%)
Query: 224 LKLEIGDIIKVTKTNIN--GQWEGELNGKTGHFP 255
L + G+II + + G W+GELNGK G FP
Sbjct: 18 LDFKEGEIILIISKDTGEPGWWKGELNGKEGVFP 51
Score = 32.5 bits (74), Expect = 0.027
Identities = 16/47 (34%), Positives = 31/47 (65%), Gaps = 3/47 (6%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKD--EEHWWTAQNISGEVGSIP 159
A + ++G + D+L FK+ +I++++SKD E WW + ++G+ G P
Sbjct: 6 ALFHYEGTNEDELDFKEGEIILIISKDTGEPGWWKGE-LNGKEGVFP 51
>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 = 34.2 bits (78), Expect = 0.007
Identities = 19/52 (36%), Positives = 29/52 (55%), Gaps = 6/52 (11%)
Query: 113 VIAK--YDFDGNDPDDLPFKKNDILIVVSKDEE---HWWTAQNISGEVGSIP 159
V+AK YD PD+L F+K DI+ V+ +D + WW ++ G G +P
Sbjct: 3 VLAKALYDNVAESPDELSFRKGDIMTVLERDTQGLDGWWLC-SLHGRQGIVP 53
>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 = 33.9 bits (77), Expect = 0.007
Identities = 17/49 (34%), Positives = 26/49 (53%), Gaps = 2/49 (4%)
Query: 117 YDFDGNDPDDLPFKKNDILIVVSKDEE--HWWTAQNISGEVGSIPVPYV 163
Y F ++L F+K + + V+ K E WW +N G+VG +P YV
Sbjct: 7 YPFSSVTEEELNFEKGETMEVIEKPENDPEWWKCKNSRGQVGLVPKNYV 55
>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 = 34.0 bits (78), Expect = 0.007
Identities = 15/56 (26%), Positives = 31/56 (55%), Gaps = 5/56 (8%)
Query: 112 KVIAKYDFDGND----PDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
+ + +D + D L F+K+DI+ V+S+ +E+W + + +VG P+ +V
Sbjct: 3 RALYNFDLKEKNREESKDCLKFQKDDIITVISRVDENWAEGK-LGDQVGIFPILFV 57
>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 = 33.7 bits (77), Expect = 0.007
Identities = 16/52 (30%), Positives = 27/52 (51%), Gaps = 1/52 (1%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A YD+D + ++L F +ND +I + ++ WW + G G P YV+
Sbjct: 2 AKALYDYDAAEDNELSFFENDKIINIEFVDDDWWLGE-CHGSRGLFPSNYVE 52
Score = 28.6 bits (64), Expect = 0.46
Identities = 9/18 (50%), Positives = 11/18 (61%)
Query: 243 WEGELNGKTGHFPFTHVE 260
W GE +G G FP +VE
Sbjct: 35 WLGECHGSRGLFPSNYVE 52
>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 = 33.9 bits (78), Expect = 0.008
Identities = 14/35 (40%), Positives = 20/35 (57%), Gaps = 3/35 (8%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDE---EHWW 146
A YD PD+L F++ DIL V+ ++ E WW
Sbjct: 4 ALYDNVAESPDELAFRRGDILTVLEQNTAGLEGWW 38
>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 = 33.6 bits (77), Expect = 0.008
Identities = 14/32 (43%), Positives = 18/32 (56%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFP 255
+ L GD +KV G WEG + G+TG FP
Sbjct: 16 ISLHKGDRVKVLSIGEGGFWEGSVRGRTGWFP 47
>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 = 33.7 bits (77), Expect = 0.009
Identities = 16/53 (30%), Positives = 25/53 (47%), Gaps = 2/53 (3%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTA-QNISGEVGSIPVPYVQK 165
+A D+ P +L + + L +VS DE WW ++G IP +V K
Sbjct: 3 VALGDYPSGGPAELSLRLGEPLTIVS-DEGDWWKVLSEVTGRESYIPSVHVAK 54
>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 = 33.9 bits (77), Expect = 0.011
Identities = 18/57 (31%), Positives = 30/57 (52%), Gaps = 10/57 (17%)
Query: 113 VIAKYDFDGNDPDDLP-----FKKNDILIVVSKDEEHWWTAQNI-----SGEVGSIP 159
V A +D++ + LP F+ DIL V++ ++ WW A+ + S E+G IP
Sbjct: 8 VRAMFDYEKSKDSGLPSQGLSFRYGDILHVINASDDEWWQARRVTPDGDSEEMGVIP 64
>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 = 34.7 bits (79), Expect = 0.012
Identities = 25/89 (28%), Positives = 42/89 (47%), Gaps = 7/89 (7%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
W+ G M RQ+ +L S +G +L+R+ + + +K N++V H I E+
Sbjct: 7 WFAGNMERQQTDNLLKSHA-SGTYLIRERPAEAERFAISIKFNDEVKH-----IKVVEKD 60
Query: 73 TCYKIGD-KTFSDLPSLLAFYKVHYLDTS 100
I + K F L L+ +Y+ H L S
Sbjct: 61 NWIHITEAKKFESLLELVEYYQCHSLKES 89
>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 = 33.3 bits (76), Expect = 0.012
Identities = 14/54 (25%), Positives = 22/54 (40%), Gaps = 4/54 (7%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNIS---GEVGSIPVPY 162
A +DF ++L F+ D + + + WWTA + G V VP
Sbjct: 1 IYKALWDFKARGDEELSFQAGDQFRIAERSGD-WWTALKLDRAGGVVAQGFVPN 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 = 33.5 bits (76), Expect = 0.012
Identities = 18/34 (52%), Positives = 21/34 (61%)
Query: 229 GDIIKVTKTNINGQWEGELNGKTGHFPFTHVEFI 262
G II V K N +G +EG NG TG FP +VE I
Sbjct: 21 GAIIYVIKKNDDGWYEGVCNGVTGLFPGNYVESI 54
Score = 33.5 bits (76), Expect = 0.012
Identities = 17/53 (32%), Positives = 30/53 (56%), Gaps = 1/53 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
KV+A YD+ + D+L F + I+ V+ K+++ W+ +G G P YV+
Sbjct: 1 KVVAIYDYSKDKDDELSFMEGAIIYVIKKNDDGWYEGVC-NGVTGLFPGNYVE 52
>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 = 34.5 bits (79), Expect = 0.012
Identities = 15/33 (45%), Positives = 20/33 (60%), Gaps = 1/33 (3%)
Query: 10 RNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSN 42
+ WY+G MT EA+ L + G FLVRDS+
Sbjct: 6 QTGWYWGSMTVNEAKEK-LQDAPEGTFLVRDSS 37
>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 = 33.1 bits (76), Expect = 0.013
Identities = 14/57 (24%), Positives = 26/57 (45%), Gaps = 5/57 (8%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEH----WWTAQNISGEVGSIPVPYVQK 165
A Y F+ P +L + ++ V+ K + WW ++ G+ G +P Y+ K
Sbjct: 2 YYALYTFEARSPGELSVTEGQVVTVLEKHDLKGNPEWWLVED-RGKQGYVPSNYLAK 57
>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 = 33.5 bits (77), Expect = 0.013
Identities = 13/61 (21%), Positives = 30/61 (49%), Gaps = 8/61 (13%)
Query: 113 VIAKYDFD------GNDPD-DLPFKKNDILIVVSK-DEEHWWTAQNISGEVGSIPVPYVQ 164
+A+Y ++ +P+ +LP D + V DE+ ++ + + G G +P +V+
Sbjct: 2 FVARYSYNPLRDSPNENPEAELPLNAGDYVYVYGDMDEDGFYEGELLDGRRGLVPSNFVE 61
Query: 165 K 165
+
Sbjct: 62 R 62
>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 = 33.0 bits (75), Expect = 0.013
Identities = 14/50 (28%), Positives = 24/50 (48%), Gaps = 1/50 (2%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
+A Y F + DDL F + + V+ E WW + I + G P+ ++
Sbjct: 3 VALYRFKALEKDDLDFHPGERITVIDDSNEEWWRGK-IGEKTGYFPMNFI 51
Score = 27.2 bits (60), Expect = 1.5
Identities = 13/42 (30%), Positives = 20/42 (47%)
Query: 218 AYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHV 259
A +K L G+ I V + W G++ KTG+FP +
Sbjct: 10 ALEKDDLDFHPGERITVIDDSNEEWWRGKIGEKTGYFPMNFI 51
>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 = 33.0 bits (76), Expect = 0.014
Identities = 14/49 (28%), Positives = 27/49 (55%), Gaps = 1/49 (2%)
Query: 117 YDFDGNDPDDLPFKKNDILIVVSKDEEHWWT-AQNISGEVGSIPVPYVQ 164
YD+ + D++ + + + V+ D+ WT +N SGE G +P Y++
Sbjct: 6 YDYTASGDDEVSISEGEEVTVLEPDDGSGWTKVRNGSGEEGLVPTSYIE 54
>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 = 34.2 bits (78), Expect = 0.014
Identities = 27/98 (27%), Positives = 45/98 (45%), Gaps = 10/98 (10%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQ 72
W+ G +TR+EA+ LL K G +LVR S + + +VL + H+++ ++ +
Sbjct: 9 WFHGFITRREAER-LLEPKPQGCYLVRFSESAV-TFVLTYRSRTCCRHFLLAQLRDGRHV 66
Query: 73 TCYKIGDKTFSDLPSLLAFYKVHYLD------TSPLIK 104
+ D + L LL Y H L T PL +
Sbjct: 67 VLGE--DSAHARLQDLLLHYTAHPLSPYGETLTEPLAR 102
>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 = 33.1 bits (76), Expect = 0.014
Identities = 12/32 (37%), Positives = 21/32 (65%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEE 143
KV A +D+ D D+L F+K D+++V+ D+
Sbjct: 4 KVRATHDYTAEDTDELTFEKGDVILVIPFDDP 35
>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 = 33.0 bits (75), Expect = 0.014
Identities = 15/53 (28%), Positives = 32/53 (60%), Gaps = 3/53 (5%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISG--EVGSIPVPYVQ 164
IAK++F+G+ ++ F+K + + ++ + +E+W+ + I G G P+ YV
Sbjct: 4 IAKFNFNGDTQVEMSFRKGERITLLRQVDENWYEGR-IPGTSRQGIFPITYVD 55
>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 = 32.9 bits (75), Expect = 0.014
Identities = 15/51 (29%), Positives = 24/51 (47%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPY 162
V A YD++ D++ + D + V+ D+ WT I+G G P Y
Sbjct: 1 YVEALYDYEAQGDDEISIRVGDRIAVIRGDDGSGWTYGEINGVKGLFPTSY 51
Score = 30.5 bits (69), Expect = 0.095
Identities = 12/33 (36%), Positives = 18/33 (54%), Gaps = 1/33 (3%)
Query: 224 LKLEIGDIIKVTKTNINGQW-EGELNGKTGHFP 255
+ + +GD I V + + W GE+NG G FP
Sbjct: 16 ISIRVGDRIAVIRGDDGSGWTYGEINGVKGLFP 48
>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 = 32.9 bits (75), Expect = 0.015
Identities = 15/54 (27%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQN-ISGEVGSIPVPYVQ 164
+ +A YDF+ ++L F + IL ++ K + W A++ G+ G +P +V
Sbjct: 1 RAVALYDFEPEHDNELGFAEGQILFILYKHGQGWLIAEDESGGKTGLVPEEFVS 54
>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 = 33.1 bits (75), Expect = 0.015
Identities = 16/52 (30%), Positives = 27/52 (51%), Gaps = 3/52 (5%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWW--TAQNISGEVGSIPVPYVQ 164
A YD+ D D++ F+ D ++ V +E W T Q +G G +P Y++
Sbjct: 5 AMYDYSAQDEDEVSFRDGDYIVNVQPIDEGWMYGTVQR-TGRTGMLPANYIE 55
>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 = 32.7 bits (75), Expect = 0.018
Identities = 14/32 (43%), Positives = 19/32 (59%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFP 255
L L GD++ +T G + GELNG+ G FP
Sbjct: 16 LDLREGDVVTITGILDKGWFRGELNGRRGIFP 47
>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 = 32.6 bits (74), Expect = 0.018
Identities = 20/54 (37%), Positives = 32/54 (59%), Gaps = 7/54 (12%)
Query: 115 AKYDFDGNDPDD----LPFKKNDILIVVSKDEEHWWTAQNISGE-VGSIPVPYV 163
A YDF+ D D L F K++IL V+ + +E+W A+ + G+ +G P+ YV
Sbjct: 4 ALYDFEIKDKDQDKDCLTFTKDEILTVIRRVDENW--AEGMLGDKIGIFPILYV 55
>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 = 32.6 bits (74), Expect = 0.019
Identities = 16/54 (29%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDE-EHWWTAQNISGEVGSIPVPYVQ 164
K A Y F + +++ ++N+ L++ S++ + W QN GE G P YV+
Sbjct: 1 KARALYSFQSENKEEINIQENEELVIFSENSLDGWLQGQNSRGETGLFPASYVE 54
>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 = 33.9 bits (77), Expect = 0.019
Identities = 28/83 (33%), Positives = 43/83 (51%), Gaps = 5/83 (6%)
Query: 13 WYFGMMTRQEAQAILLS-EKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQ 71
W+ G ++R+E++ I+L K NG FL+R + G+Y LC+ KV HY I+K +
Sbjct: 2 WFHGKISREESEQIVLIGSKTNGKFLIRARDN-NGSYALCLLHEGKVLHYRIDK--DKTG 58
Query: 72 QTCYKIGDKTFSDLPSLLAFYKV 94
+ G K F L L+ Y
Sbjct: 59 KLSIPEGKK-FDTLWQLVEHYSY 80
>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 = 32.6 bits (74), Expect = 0.019
Identities = 19/55 (34%), Positives = 28/55 (50%), Gaps = 4/55 (7%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEV---GSIPVPYVQK 165
+A DF+G D D FK+ + V K+ WW + +SG G IP Y++K
Sbjct: 3 VAVADFEG-DEDTSSFKEGTVFEVREKNSSGWWFCKVLSGGPVWEGWIPSNYLRK 56
>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 = 32.7 bits (74), Expect = 0.020
Identities = 14/51 (27%), Positives = 29/51 (56%), Gaps = 1/51 (1%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHW-WTAQNISGEVGSIPVPYVQ 164
A YD++ D D++ F+ D ++ V + ++ W + +G+ G +P YV+
Sbjct: 7 AVYDYNAADEDEVSFQDGDTIVNVQQIDDGWMYGTVERTGDTGMLPANYVE 57
>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 = 32.7 bits (74), Expect = 0.020
Identities = 16/56 (28%), Positives = 31/56 (55%), Gaps = 4/56 (7%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGE---VGSIPVPYVQ 164
+V YD ++ D+L F + +++IV ++++ WW +I G+ G PV +V
Sbjct: 1 RVKTIYDCQADNDDELTFVEGEVIIVTGEEDQEWWIG-HIEGQPERKGVFPVSFVH 55
>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 = 32.5 bits (74), Expect = 0.020
Identities = 13/35 (37%), Positives = 20/35 (57%), Gaps = 3/35 (8%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKD---EEHWW 146
A YD + D+L F++ DIL V+ ++ E WW
Sbjct: 5 ALYDNKADCSDELAFRRGDILTVLEQNVPGSEGWW 39
>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 = 32.7 bits (75), Expect = 0.022
Identities = 15/44 (34%), Positives = 25/44 (56%), Gaps = 3/44 (6%)
Query: 220 DKTALKLEIGDIIKVTK--TNINGQWE-GELNGKTGHFPFTHVE 260
D+T L GD+IK+ ++ W G L+G++G FP +V+
Sbjct: 12 DQTLLSFHKGDVIKLLPKEGPLDPGWLFGTLDGRSGAFPKEYVQ 55
>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 = 33.3 bits (76), Expect = 0.025
Identities = 22/65 (33%), Positives = 33/65 (50%), Gaps = 5/65 (7%)
Query: 12 SWYFGMMTR-QEAQAILLSEKD-NGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNT 69
W+ G ++R + AQ + L D +G FLVR S T G YVL + H +++ T
Sbjct: 9 PWFHGPISRVKAAQLVQLQGPDAHGVFLVRQSETRRGEYVLTFNFQGRAKHL---RLSLT 65
Query: 70 EQQTC 74
E+ C
Sbjct: 66 ERGQC 70
>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 = 32.5 bits (74), Expect = 0.026
Identities = 13/47 (27%), Positives = 24/47 (51%), Gaps = 1/47 (2%)
Query: 119 FDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNIS-GEVGSIPVPYVQ 164
+ + D+L +K DI++V + + W +S GE G P +V+
Sbjct: 8 YKAQENDELTLEKADIIMVRQQSSDGWLEGVRLSDGERGWFPQSHVE 54
Score = 30.1 bits (68), Expect = 0.17
Identities = 20/55 (36%), Positives = 30/55 (54%), Gaps = 2/55 (3%)
Query: 209 RVKQVRVPNAYDKTALKLEIGDIIKVTKTNINGQWEGEL--NGKTGHFPFTHVEF 261
+V+ +R A + L LE DII V + + +G EG +G+ G FP +HVE
Sbjct: 1 QVQCIRSYKAQENDELTLEKADIIMVRQQSSDGWLEGVRLSDGERGWFPQSHVEE 55
>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 = 32.3 bits (73), Expect = 0.026
Identities = 13/32 (40%), Positives = 18/32 (56%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFP 255
+ L G+ IKV G WEG++ G+ G FP
Sbjct: 17 ISLSKGEKIKVLSVGEGGFWEGQVKGRVGWFP 48
>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 = 32.3 bits (74), Expect = 0.026
Identities = 12/25 (48%), Positives = 16/25 (64%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIV 137
V A +D + D+L FKK+DIL V
Sbjct: 2 VRALFDRSAENEDELSFKKDDILYV 26
>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 = 32.2 bits (73), Expect = 0.030
Identities = 14/58 (24%), Positives = 28/58 (48%), Gaps = 4/58 (6%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEH---WWTAQNISGEVGSIPVPYVQKYSEG 169
A YD P++L F++ D+L+V+ ++ WW ++ G+ G P ++
Sbjct: 5 ALYDNAAESPEELSFRRGDVLMVLKREHGSLPGWWLC-SLHGQQGIAPANRLRLLPTA 61
>gnl|CDD|212956 cd12023, SH3_NoxO1_1, First or N-terminal Src homology 3 domain of
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 first SH3 domain (or N-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 = 56
Score = 32.1 bits (73), Expect = 0.034
Identities = 15/49 (30%), Positives = 24/49 (48%), Gaps = 2/49 (4%)
Query: 118 DFDGNDPDDLPFK--KNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
F+ D + PFK + L V+ KD WW +N ++ P PY++
Sbjct: 7 PFETKDTKNKPFKAAAQESLDVLLKDPTGWWLVENEDRQIAWFPAPYLE 55
>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 = 31.6 bits (72), Expect = 0.040
Identities = 15/53 (28%), Positives = 28/53 (52%), Gaps = 1/53 (1%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNI-SGEVGSIPVPYVQ 164
+A Y + PD+L +K ++ V K ++ W+ ++ +G+ G P YVQ
Sbjct: 2 YVALYPYKPQKPDELELRKGEMYTVTEKCQDGWFKGTSLRTGQSGVFPGNYVQ 54
>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 = 33.1 bits (75), Expect = 0.040
Identities = 16/50 (32%), Positives = 27/50 (54%), Gaps = 2/50 (4%)
Query: 13 WYFGMMTRQEAQAILLS--EKDNGAFLVRDSNTILGNYVLCVKENNKVSH 60
W+ G ++R +A ++L+ + +G F++R S T G YVL K H
Sbjct: 10 WFHGTLSRVKAAQLVLAGGPRSHGLFVIRQSETRPGEYVLTFNFQGKAKH 59
>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 = 31.8 bits (72), Expect = 0.041
Identities = 12/21 (57%), Positives = 14/21 (66%)
Query: 240 NGQWEGELNGKTGHFPFTHVE 260
+G WEGE NG+ G FP VE
Sbjct: 35 DGFWEGEFNGRIGVFPSVLVE 55
Score = 29.9 bits (67), Expect = 0.17
Identities = 15/55 (27%), Positives = 31/55 (56%), Gaps = 4/55 (7%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKD---EEHWWTAQNISGEVGSIPVPYVQ 164
V A YD++G D+L F + I+ +++K+ ++ +W + +G +G P V+
Sbjct: 2 VKALYDYEGQTDDELSFPEGAIIRILNKENQDDDGFWEGE-FNGRIGVFPSVLVE 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 = 31.8 bits (72), Expect = 0.044
Identities = 16/44 (36%), Positives = 23/44 (52%), Gaps = 5/44 (11%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNG-----KTGHFPFTHVEFI 262
L L G +I + K N +G W GEL + G FP +HV+ +
Sbjct: 16 LSLSPGQLILILKKNSSGWWLGELQARGKKRQKGWFPASHVKLL 59
>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 = 31.8 bits (72), Expect = 0.049
Identities = 15/57 (26%), Positives = 29/57 (50%), Gaps = 10/57 (17%)
Query: 115 AKYDFDGNDPDDLP-------FKKNDILIVVSKDEEHWWTAQ---NISGEVGSIPVP 161
A++D+D + +P F+ DI+ +++KD+ +WW + + G IP P
Sbjct: 4 AQFDYDPKKDNLIPCKEAGLKFQTGDIIQIINKDDSNWWQGRVEGSGEESAGLIPSP 60
>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 = 31.5 bits (71), Expect = 0.054
Identities = 13/32 (40%), Positives = 19/32 (59%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFP 255
++L G+ +KV G WEG + G+TG FP
Sbjct: 17 IQLNRGERVKVLSIGEGGFWEGTVKGRTGWFP 48
>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 = 31.3 bits (71), Expect = 0.061
Identities = 13/34 (38%), Positives = 18/34 (52%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWW 146
V A YD+ D+L F K ++ VSK+ WW
Sbjct: 2 VKALYDYRAKRSDELSFCKGALIHNVSKETGGWW 35
>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 = 31.1 bits (70), Expect = 0.064
Identities = 16/48 (33%), Positives = 24/48 (50%), Gaps = 4/48 (8%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDE---EHWWTAQNISGEVGSIP 159
A YD ++L F+K DIL V+ ++ E WW ++ G G P
Sbjct: 4 ALYDNVPECAEELAFRKGDILTVIEQNTGGLEGWWLC-SLHGRQGIAP 50
>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 = 31.3 bits (71), Expect = 0.065
Identities = 13/48 (27%), Positives = 26/48 (54%)
Query: 117 YDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
YD++ ++ +++ + +I+ + +E WW N GE G P YV+
Sbjct: 6 YDYEKDEDNEIELVEGEIVTNIEMVDEDWWMGTNSKGESGLFPSNYVE 53
>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 = 32.3 bits (73), Expect = 0.069
Identities = 23/87 (26%), Positives = 36/87 (41%), Gaps = 12/87 (13%)
Query: 18 MTRQEAQAIL-----LSEKDNGAFLVRDSNTILGNYVLCV--KENNKVSHYIINKITNTE 70
M +E + + +G + +R+S+T G VL V KV +Y I + +
Sbjct: 7 MESREVERLFKATSPKGGPQDGLYCIRNSST-KGGKVLVVWDGGAEKVRNYRIFE----K 61
Query: 71 QQTCYKIGDKTFSDLPSLLAFYKVHYL 97
Y + FS L SL+ Y H L
Sbjct: 62 DCKFYLHEREVFSSLGSLVEHYATHVL 88
>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 = 31.8 bits (73), Expect = 0.079
Identities = 19/83 (22%), Positives = 35/83 (42%), Gaps = 5/83 (6%)
Query: 14 YFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVK-ENNKVSHYII---NKITNT 69
F + ++A+A L KD G ++R S+ + + + K + H I NK
Sbjct: 4 LFKNVNYKQAEA-YLKSKDVGEVVIRPSSKGVDHLTVTWKVADGVYQHIDIEELNKENPF 62
Query: 70 EQQTCYKIGDKTFSDLPSLLAFY 92
IG + + DL ++A +
Sbjct: 63 SLGKELIIGGEEYEDLDEIIARF 85
>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 = 31.2 bits (70), Expect = 0.080
Identities = 13/39 (33%), Positives = 24/39 (61%), Gaps = 2/39 (5%)
Query: 127 LPFKKNDILIVVSKDEEHWWTAQNIS--GEVGSIPVPYV 163
L F K +IL +V++++ +WW A ++ G G IP ++
Sbjct: 23 LKFSKGEILQIVNREDPNWWQASHVKEGGSAGLIPSQFL 61
>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 = 30.9 bits (70), Expect = 0.084
Identities = 16/43 (37%), Positives = 24/43 (55%), Gaps = 2/43 (4%)
Query: 221 KTALKLEIGDIIKVTKTNINGQW-EGELNGKTGHFPFTHVEFI 262
K L + GD+I + + +N W EG + G TG FP + V+ I
Sbjct: 13 KLELNFKAGDVIFLL-SRVNKDWLEGTVRGATGIFPLSFVKII 54
Score = 29.0 bits (65), Expect = 0.38
Identities = 15/50 (30%), Positives = 27/50 (54%), Gaps = 1/50 (2%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A +DF GN +L FK D++ ++S+ + W + G G P+ +V+
Sbjct: 4 ALFDFTGNSKLELNFKAGDVIFLLSRVNKDWLEG-TVRGATGIFPLSFVK 52
>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 = 30.7 bits (69), Expect = 0.086
Identities = 15/53 (28%), Positives = 28/53 (52%), Gaps = 3/53 (5%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+ IA D++ + ++ K D++ VV K E WW Q + + G +P Y++
Sbjct: 3 RAIA--DYEKSSKSEMALKTGDVVEVVEKSENGWWFCQ-LKAKRGWVPASYLE 52
Score = 28.8 bits (64), Expect = 0.51
Identities = 15/50 (30%), Positives = 29/50 (58%), Gaps = 3/50 (6%)
Query: 214 RVPNAYDKTA---LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
R Y+K++ + L+ GD+++V + + NG W +L K G P +++E
Sbjct: 3 RAIADYEKSSKSEMALKTGDVVEVVEKSENGWWFCQLKAKRGWVPASYLE 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 = 30.5 bits (69), Expect = 0.091
Identities = 11/34 (32%), Positives = 17/34 (50%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHW 145
V A D L F+K DIL V+++ ++ W
Sbjct: 1 VVRALCHHVATDSGQLSFRKGDILRVIARVDDDW 34
>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 = 30.4 bits (69), Expect = 0.100
Identities = 9/37 (24%), Positives = 18/37 (48%), Gaps = 2/37 (5%)
Query: 112 KVIAKYDFD--GNDPDDLPFKKNDILIVVSKDEEHWW 146
V+ Y F+ G D + K+ + +++ K + WW
Sbjct: 1 YVVVLYPFEYTGKDGRKVSIKEGERFLLLKKSNDDWW 37
>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 = 30.7 bits (69), Expect = 0.10
Identities = 14/34 (41%), Positives = 18/34 (52%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWW 146
V A +D+ D+L F KN I+ V K E WW
Sbjct: 6 VKALFDYKAQREDELTFTKNAIIQNVEKQEGGWW 39
>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 = 30.8 bits (69), Expect = 0.10
Identities = 15/55 (27%), Positives = 27/55 (49%), Gaps = 1/55 (1%)
Query: 111 EKVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
EK + + D++ F+K + V+ K+ E WW + G+ G P Y++K
Sbjct: 1 EKYVTVQPYTSQGKDEIGFEKGVTVEVIQKNLEGWWYIRY-LGKEGWAPASYLKK 54
>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 = 30.5 bits (69), Expect = 0.11
Identities = 13/52 (25%), Positives = 22/52 (42%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
+ A YD+D ++L F + D L V + W + G +P Y+
Sbjct: 1 QAKALYDYDKQTEEELSFNEGDTLDVYDDSDSDWILVGFNGTQFGFVPANYI 52
>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 = 30.7 bits (69), Expect = 0.11
Identities = 16/49 (32%), Positives = 27/49 (55%), Gaps = 1/49 (2%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNI-SGEVGSIPVPY 162
A + F PD+L + +D L+V + E++W+ A N+ +G G P Y
Sbjct: 4 AVFRFVPRHPDELELEVDDPLLVEVQAEDYWYEAYNMRTGARGIFPAYY 52
>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 = 30.7 bits (69), Expect = 0.11
Identities = 14/51 (27%), Positives = 26/51 (50%), Gaps = 1/51 (1%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWT-AQNISGEVGSIPVPYVQ 164
A Y F G+ + + + L +V +D+ WT + +GE G +P Y++
Sbjct: 4 ALYAFVGSSEGTISMTEGEKLSLVEEDKGDGWTRVRRDTGEEGYVPTSYIR 54
>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 = 30.7 bits (69), Expect = 0.12
Identities = 15/55 (27%), Positives = 33/55 (60%), Gaps = 3/55 (5%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISG--EVGSIPVPYVQ 164
+ +AKY+F+ + +L +K D ++++ + +++W+ + I G G PV YV+
Sbjct: 2 EAVAKYNFNADTNVELSLRKGDRVVLLKQVDQNWYEGK-IPGTNRQGIFPVSYVE 55
>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 = 30.2 bits (68), Expect = 0.13
Identities = 17/53 (32%), Positives = 27/53 (50%), Gaps = 1/53 (1%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNI-SGEVGSIPVPYV 163
KV A Y + G DL F + D++ V+S + WW+ + +G G P +V
Sbjct: 1 KVKAVYSWAGETEGDLGFLEGDLIEVLSIGDGSWWSGKLRRNGAEGIFPSNFV 53
>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 = 30.3 bits (68), Expect = 0.13
Identities = 12/34 (35%), Positives = 22/34 (64%), Gaps = 1/34 (2%)
Query: 127 LPFKKNDILIVVSKDEEHWWTAQNIS-GEVGSIP 159
L F+ D+L +V++++ +WW A ++ G G IP
Sbjct: 23 LKFRAGDLLQIVNQEDPNWWQACHVEGGSAGLIP 56
>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 = 30.3 bits (68), Expect = 0.14
Identities = 16/40 (40%), Positives = 25/40 (62%), Gaps = 2/40 (5%)
Query: 224 LKLEIGDIIKVTKTNINGQW-EGELNGKTGHFPFTHVEFI 262
L L+ GDI+ + K ++ W EGE +G+ G FP +VE +
Sbjct: 17 LTLQKGDIVYIHK-EVDKNWLEGEHHGRVGIFPANYVEVL 55
Score = 28.7 bits (64), Expect = 0.53
Identities = 15/50 (30%), Positives = 27/50 (54%), Gaps = 1/50 (2%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
K+DF P +L +K DI+ + + +++W ++ G VG P YV+
Sbjct: 5 LKFDFQAQSPKELTLQKGDIVYIHKEVDKNWLEGEH-HGRVGIFPANYVE 53
>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 = 30.1 bits (68), Expect = 0.14
Identities = 19/49 (38%), Positives = 27/49 (55%), Gaps = 3/49 (6%)
Query: 115 AKYDFDGNDPDDLPFKKNDILI-VVSKDEEHWWTAQNISGEVGSIPVPY 162
A YDF G + D+L FK DI+ + S DEE W + + G+ G P +
Sbjct: 4 ALYDFTGENEDELSFKAGDIITELESIDEE--WMSGELRGKSGIFPKNF 50
Score = 26.7 bits (59), Expect = 2.3
Identities = 18/43 (41%), Positives = 24/43 (55%), Gaps = 7/43 (16%)
Query: 219 YDKTA-----LKLEIGDIIKVTKTNINGQW-EGELNGKTGHFP 255
YD T L + GDII ++ I+ +W GEL GK+G FP
Sbjct: 6 YDFTGENEDELSFKAGDIITELES-IDEEWMSGELRGKSGIFP 47
>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 = 30.1 bits (68), Expect = 0.15
Identities = 15/55 (27%), Positives = 29/55 (52%), Gaps = 3/55 (5%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISG--EVGSIPVPYVQK 165
A YDF +L ++ D L V+ ++ ++ + A+ ++G E G +P YV +
Sbjct: 2 FTALYDFTARSTHELSVEQGDKLCVIEEEGDYIF-ARKLTGNPESGLVPASYVAQ 55
>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 = 29.6 bits (66), Expect = 0.19
Identities = 16/38 (42%), Positives = 22/38 (57%), Gaps = 2/38 (5%)
Query: 127 LPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
L F KNDI I V + +E+WW + + G G P YV+
Sbjct: 16 LNFSKNDI-ITVLEQQENWWFGE-VHGGRGWFPKSYVK 51
Score = 25.8 bits (56), Expect = 4.8
Identities = 13/31 (41%), Positives = 19/31 (61%), Gaps = 1/31 (3%)
Query: 230 DIIKVTKTNINGQWEGELNGKTGHFPFTHVE 260
DII V + N W GE++G G FP ++V+
Sbjct: 22 DIITVLEQQEN-WWFGEVHGGRGWFPKSYVK 51
>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 = 30.1 bits (67), Expect = 0.24
Identities = 16/44 (36%), Positives = 22/44 (50%), Gaps = 5/44 (11%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGK-----TGHFPFTHVEFI 262
L L G +I + K N G WEGEL + G FP +V+ +
Sbjct: 20 LTLAPGQLILIRKKNPGGWWEGELQARGKKRQIGWFPANYVKLL 63
>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 = 29.8 bits (67), Expect = 0.24
Identities = 17/47 (36%), Positives = 24/47 (51%), Gaps = 2/47 (4%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEH-WWTAQ-NISGEVGSI 158
+ K D P +L F K DI+ +V E W+ A+ N SGE G +
Sbjct: 5 VTKKDHTKPKPGELAFHKGDIVTIVETCERKGWYRARHNTSGEEGLV 51
>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 = 30.2 bits (68), Expect = 0.26
Identities = 13/34 (38%), Positives = 20/34 (58%), Gaps = 1/34 (2%)
Query: 10 RNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNT 43
SW+ G ++R EA+ L + G FL+R S+T
Sbjct: 9 AKSWFHGDISRDEAEKRLRGRPE-GTFLIRLSST 41
>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 = 29.6 bits (66), Expect = 0.28
Identities = 16/39 (41%), Positives = 23/39 (58%), Gaps = 2/39 (5%)
Query: 224 LKLEIGDIIKV--TKTNINGQWEGELNGKTGHFPFTHVE 260
+ ++ GDI+ V ++T G GEL GKTG FP + E
Sbjct: 16 ITIQPGDIVMVDESQTGEPGWLGGELKGKTGWFPANYAE 54
>gnl|CDD|212913 cd11980, SH3_VAV2_1, First 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 = 60
Score = 29.5 bits (66), Expect = 0.29
Identities = 14/43 (32%), Positives = 25/43 (58%), Gaps = 3/43 (6%)
Query: 221 KTALKLEIGDIIKVTKTNINGQ-WEGEL--NGKTGHFPFTHVE 260
K L + GD+I++ + + + WEG L K+G+FP + V+
Sbjct: 17 KPVLTFQTGDVIELLRGDPDSPWWEGRLLQTKKSGYFPSSSVK 59
>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 = 29.7 bits (66), Expect = 0.30
Identities = 18/57 (31%), Positives = 28/57 (49%), Gaps = 10/57 (17%)
Query: 113 VIAKYDFDGNDPDDLP-----FKKNDILIVVSKDEEHWWTAQNI-----SGEVGSIP 159
V A +D+D LP F DIL V++ ++ WW A+ + S ++G IP
Sbjct: 5 VRALFDYDRTRDSCLPSQGLSFSYGDILHVINASDDEWWQARLVTPHGESEQIGVIP 61
>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 = 29.6 bits (67), Expect = 0.31
Identities = 15/46 (32%), Positives = 25/46 (54%), Gaps = 2/46 (4%)
Query: 216 PNAYDKTALKLEIGDIIKV-TKTNINGQWEGELNGKTGHFPFTHVE 260
P+A ++ L + G +IKV + +G + GE+NG+ G P V
Sbjct: 17 PDAAEEE-LPFKEGQLIKVYGDKDADGFYLGEINGRRGLVPCNMVS 61
>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 = 30.6 bits (70), Expect = 0.31
Identities = 14/43 (32%), Positives = 23/43 (53%), Gaps = 5/43 (11%)
Query: 8 HDRNSWYF----GMMTRQEAQAILLSEKDNGAFLVRDSNTILG 46
H W G ++++EA+ +L K G FL+R S++ LG
Sbjct: 12 HLLKLWQDGLIMGFISKEEAEDLLKK-KPPGTFLLRFSDSELG 53
>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 = 29.3 bits (65), Expect = 0.32
Identities = 15/50 (30%), Positives = 27/50 (54%), Gaps = 2/50 (4%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A Y + + L F KND++ V+ + ++ WW + + G+ G P YV+
Sbjct: 4 ALYPWRAKKDNHLNFNKNDVITVLEQ-QDMWWFGE-VQGQKGWFPKSYVK 51
>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 = 29.3 bits (65), Expect = 0.33
Identities = 13/22 (59%), Positives = 15/22 (68%)
Query: 241 GQWEGELNGKTGHFPFTHVEFI 262
G EG LNGKTG P +VEF+
Sbjct: 35 GWLEGTLNGKTGLIPENYVEFL 56
>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 = 29.9 bits (67), Expect = 0.33
Identities = 13/39 (33%), Positives = 23/39 (58%), Gaps = 4/39 (10%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVV----SKDEEHWW 146
KV +DF+ + D+L K+ DI++VV + D++ W
Sbjct: 4 KVETLHDFEAANSDELELKRGDIVLVVPSETAADQDAGW 42
>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 = 29.4 bits (66), Expect = 0.33
Identities = 15/55 (27%), Positives = 27/55 (49%), Gaps = 3/55 (5%)
Query: 113 VIAKYDFD--GNDPDDLPFKKNDILIVVSKDEEHWW-TAQNISGEVGSIPVPYVQ 164
V+ ++ F+ G D + K N+ I++ + EHWW ++ IP YV+
Sbjct: 2 VLVEHAFEYTGKDGRLVSIKPNERYILLRRTNEHWWHVRRDKGTRPFYIPAKYVK 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 = 30.5 bits (69), Expect = 0.34
Identities = 12/29 (41%), Positives = 19/29 (65%), Gaps = 1/29 (3%)
Query: 13 WYFGMMTRQEAQAILLSEKDNGAFLVRDS 41
+Y+ ++ +EA LLS + G FL+RDS
Sbjct: 12 FYWSTVSGKEANL-LLSAEPAGTFLIRDS 39
>gnl|CDD|198202 cd10339, SH2_RIN_family, Src homology 2 (SH2) domain found in Ras
and Rab interactor (RIN)-family. The RIN (AKA Ras
interaction/interference) family is composed of RIN1,
RIN2 and RIN3. These proteins have multifunctional
domains including SH2 and proline-rich (PR) domains in
the N-terminal region, and RIN-family homology (RH),
VPS9 and Ras-association (RA) domains in the C-terminal
region. RIN proteins function as Rab5-GEFs, and RIN3
specifically functions as a Rab31-GEF. 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 = 30.2 bits (68), Expect = 0.35
Identities = 24/79 (30%), Positives = 30/79 (37%), Gaps = 13/79 (16%)
Query: 21 QEAQAILLSEKDNGAFLVRDSNTILGNYVLCVKENNK------VSHYIINKITNTEQQTC 74
A +L + G FLVR SNT VLC++ HYI
Sbjct: 19 AAEAAHMLQTEPPGTFLVRKSNT-RQCQVLCMRLPEASGPAFVSEHYIKE-----SPGGV 72
Query: 75 YKIGDK-TFSDLPSLLAFY 92
G + F DL L+AFY
Sbjct: 73 SLEGSELMFPDLFRLIAFY 91
>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 = 29.0 bits (65), Expect = 0.39
Identities = 14/51 (27%), Positives = 28/51 (54%), Gaps = 1/51 (1%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQN-ISGEVGSIPVPYV 163
+A + + + P++L +K + + V+ K +E W + ++G VG P YV
Sbjct: 3 VALHSYSAHRPEELELQKGEGVRVLGKFQEGWLRGLSLVTGRVGIFPSNYV 53
>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 = 29.6 bits (66), Expect = 0.39
Identities = 14/50 (28%), Positives = 24/50 (48%), Gaps = 1/50 (2%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
A +D D +L FK D++ V+ + WW + + E G P +V+
Sbjct: 22 ALWDHVTMDDQELGFKAGDVIEVMDATNKEWWWGRVLDSE-GWFPASFVR 70
>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 = 29.2 bits (65), Expect = 0.39
Identities = 18/56 (32%), Positives = 26/56 (46%), Gaps = 4/56 (7%)
Query: 204 LPAFARVKQVRVPNAYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHV 259
+PAF + V A + L L G + V + +G W G NG+ G FP +V
Sbjct: 1 IPAFVKFAYV----AEREDELSLVKGSRVTVMEKCSDGWWRGSYNGQIGWFPSNYV 52
Score = 26.9 bits (59), Expect = 2.1
Identities = 13/50 (26%), Positives = 23/50 (46%), Gaps = 1/50 (2%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
K+ + D+L K + V+ K + WW + +G++G P YV
Sbjct: 4 FVKFAYVAEREDELSLVKGSRVTVMEKCSDGWWRG-SYNGQIGWFPSNYV 52
>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 = 28.9 bits (65), Expect = 0.44
Identities = 14/39 (35%), Positives = 22/39 (56%), Gaps = 1/39 (2%)
Query: 123 DPDDLPFKKNDILIVVSKDEEHW-WTAQNISGEVGSIPV 160
D D+L F+K DI +V ++ E+ W W +GE G +
Sbjct: 15 DTDELSFQKGDIFVVHNELEDGWLWVTSLRTGESGLVFR 53
>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 = 28.9 bits (65), Expect = 0.45
Identities = 14/52 (26%), Positives = 26/52 (50%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
+A +F P +L + + L ++S+D + W + ++G IP YV K
Sbjct: 3 VALCNFPSGGPTELSIRMGEQLTILSEDGDWWKVSSAVTGRECYIPSNYVAK 54
>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 = 28.6 bits (64), Expect = 0.47
Identities = 14/48 (29%), Positives = 24/48 (50%), Gaps = 1/48 (2%)
Query: 118 DFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
+F D + F+K + V+ K+ WW + I G+ G P Y++K
Sbjct: 7 EFQATIQDGISFQKGQKVEVIDKNPSGWWYVK-IDGKEGWAPSSYIEK 53
>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 = 28.4 bits (64), Expect = 0.51
Identities = 19/53 (35%), Positives = 29/53 (54%), Gaps = 3/53 (5%)
Query: 113 VI-AKYDFDGNDPDDLPFKKNDILIVVSK-DEEHWWTAQN-ISGEVGSIPVPY 162
VI A YD+ P +L F K D V+ + D+ W+ A N ++G+ G +P Y
Sbjct: 1 VIRALYDYRAQTPGELSFSKGDFFHVIGEEDQGEWYEATNPVTGKRGLVPKSY 53
>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 = 0.54
Identities = 13/38 (34%), Positives = 20/38 (52%), Gaps = 5/38 (13%)
Query: 127 LPFKKNDILIVVSKDEEHWWTAQNISG-----EVGSIP 159
L F+ D+L V+ +E WW A+ + E+G IP
Sbjct: 23 LSFRFGDVLHVIDAGDEEWWQARRVHSDSETEEIGFIP 60
>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 = 28.3 bits (63), Expect = 0.56
Identities = 14/41 (34%), Positives = 23/41 (56%), Gaps = 1/41 (2%)
Query: 123 DPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
+P L F K DIL V+S+ + W ++ + G +P+ YV
Sbjct: 12 EPGQLSFNKGDILQVLSRADGDWLRC-SLGPDSGLVPIAYV 51
>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 = 28.4 bits (63), Expect = 0.61
Identities = 12/55 (21%), Positives = 27/55 (49%), Gaps = 5/55 (9%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEH----WWTAQNISGEVGSIPVPYVQK 165
A Y + G P++L F + ++ ++ + ++ +W + G VG P V++
Sbjct: 4 ALYSYTGQSPEELSFPEGALIRLLPRAQDGVDDGFWRGE-FGGRVGVFPSLLVEE 57
>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 = 28.3 bits (63), Expect = 0.64
Identities = 18/52 (34%), Positives = 28/52 (53%), Gaps = 6/52 (11%)
Query: 117 YDFD---GNDPDDLPFKKNDILIVVSKD-EEHWWTAQNISGEVGSIPVPYVQ 164
YDF GN+ +L K+ +I+ V + + W A+N GE G +P YV+
Sbjct: 6 YDFAAEPGNN--ELTVKEGEIITVTNPNVGGGWIEAKNSQGERGLVPTDYVE 55
Score = 28.3 bits (63), Expect = 0.79
Identities = 18/52 (34%), Positives = 27/52 (51%), Gaps = 8/52 (15%)
Query: 219 YDKTA------LKLEIGDIIKVTKTNINGQW-EGELN-GKTGHFPFTHVEFI 262
YD A L ++ G+II VT N+ G W E + + G+ G P +VE +
Sbjct: 6 YDFAAEPGNNELTVKEGEIITVTNPNVGGGWIEAKNSQGERGLVPTDYVEIV 57
>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 = 28.4 bits (63), Expect = 0.66
Identities = 20/54 (37%), Positives = 26/54 (48%), Gaps = 1/54 (1%)
Query: 209 RVKQVRVPNAYDKTALKLEIGDIIK-VTKTNINGQWEGELNGKTGHFPFTHVEF 261
+ K V A + L E+G I + VT + G EG LNGK G P +VE
Sbjct: 1 KAKAVYPCEAEHSSELSFEVGAIFEDVTLSREPGWLEGTLNGKRGLIPENYVEI 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 = 28.4 bits (63), Expect = 0.69
Identities = 15/42 (35%), Positives = 24/42 (57%), Gaps = 4/42 (9%)
Query: 113 VIAKYDFDGNDPDDLPFKKND-ILIVVSKDE---EHWWTAQN 150
V A +D++ + D+L F++ D I I+ KD+ E WW N
Sbjct: 3 VYALWDYEAQNADELSFQEGDAITILRRKDDSETEWWWARLN 44
>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 = 28.9 bits (64), Expect = 0.70
Identities = 16/28 (57%), Positives = 20/28 (71%), Gaps = 1/28 (3%)
Query: 14 YFGMMTRQEAQAILLSEKDNGAFLVRDS 41
Y+G+M R EA+A LL K G FL+RDS
Sbjct: 3 YWGVMDRYEAEA-LLEGKPEGTFLLRDS 29
>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 = 28.1 bits (62), Expect = 0.80
Identities = 15/48 (31%), Positives = 25/48 (52%), Gaps = 1/48 (2%)
Query: 116 KYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYV 163
K+++ D+L K +IV+ K + WW + +G+VG P YV
Sbjct: 7 KFNYTAEREDELSLVKGTKVIVMEKCSDGWWRG-SYNGQVGWFPSNYV 53
Score = 26.5 bits (58), Expect = 3.0
Identities = 17/56 (30%), Positives = 25/56 (44%), Gaps = 4/56 (7%)
Query: 204 LPAFARVKQVRVPNAYDKTALKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHV 259
LPA+ + A + L L G + V + +G W G NG+ G FP +V
Sbjct: 2 LPAYVKFNYT----AEREDELSLVKGTKVIVMEKCSDGWWRGSYNGQVGWFPSNYV 53
>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 = 28.1 bits (62), Expect = 0.82
Identities = 13/39 (33%), Positives = 20/39 (51%), Gaps = 1/39 (2%)
Query: 126 DLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+L FK D++ V+ + WW Q I E G P +V+
Sbjct: 20 ELAFKAGDVIKVLDASNKDWWWGQ-IDDEEGWFPASFVR 57
Score = 27.4 bits (60), Expect = 1.6
Identities = 12/38 (31%), Positives = 20/38 (52%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKTGHFPFTHVEF 261
L + GD+IKV + W G+++ + G FP + V
Sbjct: 21 LAFKAGDVIKVLDASNKDWWWGQIDDEEGWFPASFVRL 58
>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 = 29.3 bits (66), Expect = 0.82
Identities = 14/33 (42%), Positives = 21/33 (63%), Gaps = 1/33 (3%)
Query: 9 DRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDS 41
D + +Y+G ++ +EA A L E G FL+RDS
Sbjct: 8 DASGFYWGPLSVEEAHAKLKREPV-GTFLIRDS 39
>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 = 29.5 bits (66), Expect = 0.85
Identities = 18/55 (32%), Positives = 31/55 (56%), Gaps = 2/55 (3%)
Query: 12 SWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLC-VKENNKVSHYIINK 65
+W+ G ++ E++ L+ K G FLVR S + G Y + V +N +SH I++
Sbjct: 11 AWFHGDISTSESEN-RLNGKPEGTFLVRFSTSEPGAYTISKVSKNGGISHQRIHR 64
>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 = 28.0 bits (62), Expect = 0.91
Identities = 13/30 (43%), Positives = 14/30 (46%)
Query: 226 LEIGDIIKVTKTNINGQWEGELNGKTGHFP 255
L GD +KV G WEG G G FP
Sbjct: 19 LHKGDRVKVLSIGEGGFWEGSARGHVGWFP 48
>gnl|CDD|213004 cd12071, SH3_FBP17, Src Homology 3 domain of Formin Binding Protein
17. Formin Binding Protein 17 (FBP17), also called
FormiN Binding Protein 1 (FNBP1), is involved in
dynamin-mediated endocytosis. It is recruited to
clathrin-coated pits late in the endocytosis process and
may play a role in the invagination and scission steps.
FBP17 binds in vivo to tankyrase, a protein involved in
telomere maintenance and mitogen activated protein
kinase (MAPK) signaling. It contains an N-terminal F-BAR
(FES-CIP4 Homology and Bin/Amphiphysin/Rvs) domain, a
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 = 28.0 bits (62), Expect = 0.97
Identities = 14/53 (26%), Positives = 27/53 (50%), Gaps = 1/53 (1%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWT-AQNISGEVGSIPVPYVQKY 166
A Y F+G + + + ++L V+ +D+ WT + E G +P Y++ Y
Sbjct: 5 ALYPFEGQNEGTISVAEGEMLYVIEEDKGDGWTRIRRNEDEEGYVPTSYIEVY 57
>gnl|CDD|220394 pfam09773, Meckelin, Meckelin (Transmembrane protein 67). Members
of this family are thought to be related to the ciliary
basal body. Defects result in Meckel syndrome type 3, an
autosomal recessive disorder characterized by a
combination of renal cysts and variably associated
features including developmental anomalies of the
central nervous system (typically encephalocele),
hepatic ductal dysplasia and cysts, and polydactyly.
Joubert syndrome type 6 is also a manifestation of
certain mutations; it is an autosomal recessive
congenital malformation of the cerebellar vermis and
brainstem with abnormalities of axonal decussation
(crossing in the brain) affecting the corticospinal
tract and superior cerebellar peduncles. Individuals
with Joubert syndrome have motor and behavioral
abnormalities, including an inability to walk due to
severe clumsiness and 'mirror' movements, and cognitive
and behavioural disturbances.
Length = 847
Score = 30.5 bits (69), Expect = 1.1
Identities = 22/89 (24%), Positives = 35/89 (39%), Gaps = 16/89 (17%)
Query: 45 LGNYVLCVKENNKVSHYIINKITNT--EQQTCYKIGDKTFSDLPSLLAFYKVH------Y 96
L N LCV ++ ++ T + Y + LP L FY +
Sbjct: 86 LAN--LCVLMMFSLTSTPC-RLFLTVFSSKAKYAHSGQWRRSLPWL--FYGRNTATASIV 140
Query: 97 LDTSPL-IKPATK--TIEKVIAKYDFDGN 122
L T PL + + + ++ V+A YD GN
Sbjct: 141 LSTLPLPTRLSFRGKNLKLVVAVYDLRGN 169
>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 = 28.1 bits (62), Expect = 1.7
Identities = 15/31 (48%), Positives = 20/31 (64%), Gaps = 1/31 (3%)
Query: 11 NSWYFGMMTRQEAQAILLSEKDNGAFLVRDS 41
N Y+G+M + A+A LL K G FL+RDS
Sbjct: 10 NPCYWGVMDKYAAEA-LLEGKPEGTFLLRDS 39
>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 = 27.5 bits (61), Expect = 1.9
Identities = 18/68 (26%), Positives = 27/68 (39%), Gaps = 16/68 (23%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIV---------------VSKDEEHWWTAQN-ISGEVGSI 158
A YD++ +D+ K D+L+V E W +N +GE G
Sbjct: 5 ALYDYEKERDEDIILKTGDVLVVENPELLALGVPDGKETVPKPEGWLEGKNERTGERGDF 64
Query: 159 PVPYVQKY 166
P YV+ Y
Sbjct: 65 PGTYVEFY 72
>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 = 26.9 bits (59), Expect = 2.1
Identities = 11/51 (21%), Positives = 27/51 (52%), Gaps = 1/51 (1%)
Query: 114 IAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNI-SGEVGSIPVPYV 163
+A Y + D+L +K ++ +V + ++ W+ ++ + ++G P YV
Sbjct: 3 VAIYPYTPRKEDELELRKGEMFLVFERCQDGWFKGTSMHTSKIGVFPGNYV 53
>gnl|CDD|212914 cd11981, SH3_VAV3_1, First 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 = 62
Score = 27.1 bits (60), Expect = 2.2
Identities = 13/43 (30%), Positives = 20/43 (46%), Gaps = 3/43 (6%)
Query: 216 PNAYDKTALKLEIGDIIKVTKTNINGQ-WEGEL--NGKTGHFP 255
P + L +IGD I+V + + W+G G+ G FP
Sbjct: 14 PQLHGGPPLNAQIGDTIEVLYADPHSLFWQGRNLTTGELGFFP 56
>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 = 27.3 bits (60), Expect = 2.2
Identities = 13/42 (30%), Positives = 22/42 (52%), Gaps = 2/42 (4%)
Query: 127 LPFKKNDIL-IVVSKDEEHWWTAQNIS-GEVGSIPVPYVQKY 166
L DI+ + ++ E++WW +N S E+G P V+ Y
Sbjct: 22 LRLNPGDIVELTKAEAEQNWWEGRNTSTNEIGWFPCNRVKPY 63
Score = 26.9 bits (59), Expect = 2.4
Identities = 14/40 (35%), Positives = 19/40 (47%), Gaps = 3/40 (7%)
Query: 224 LKLEIGDIIKVTKTNINGQWEGELNGKT---GHFPFTHVE 260
L+L GDI+++TK W N T G FP V+
Sbjct: 22 LRLNPGDIVELTKAEAEQNWWEGRNTSTNEIGWFPCNRVK 61
>gnl|CDD|130916 TIGR01857, FGAM-synthase, phosphoribosylformylglycinamidine
synthase, clade II. This model represents a
single-molecule form of
phosphoribosylformylglycinamidine synthase, also called
FGAM synthase, an enzyme of purine de novo biosynthesis.
This model represents a second clade of these enzymes
found in Clostridia, Bifidobacteria and Streptococcus
species. This enzyme performs the fourth step in IMP
biosynthesis (the precursor of all purines) from PRPP
[Purines, pyrimidines, nucleosides, and nucleotides,
Purine ribonucleotide biosynthesis].
Length = 1239
Score = 29.4 bits (66), Expect = 2.5
Identities = 18/66 (27%), Positives = 31/66 (46%), Gaps = 3/66 (4%)
Query: 23 AQAI-LLSEKDNGAFLVRDSNTILGNYVLCVKENNKVSHYIINKITNTEQQTCYKIGDKT 81
+ I LLSE ++ V + + N L +E NK+ +Y IN + + E+ +
Sbjct: 97 QECILLLSESEDVT--VNTAKLYILNGDLDDEELNKIKNYYINPVDSREKDLTTGKALEE 154
Query: 82 FSDLPS 87
FS+ P
Sbjct: 155 FSESPK 160
>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 = 26.8 bits (59), Expect = 2.7
Identities = 14/52 (26%), Positives = 28/52 (53%), Gaps = 1/52 (1%)
Query: 115 AKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNI-SGEVGSIPVPYVQK 165
A + F D+L +D L+V ++++++W+ N+ +GE G P Y +
Sbjct: 4 AVFRFIPRHEDELELDVDDPLLVEAEEDDYWYRGYNMRTGERGIFPAFYAHE 55
>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 = 26.5 bits (59), Expect = 2.7
Identities = 12/53 (22%), Positives = 25/53 (47%), Gaps = 5/53 (9%)
Query: 112 KVIAKYDFDGNDPDDLPFKKNDILIVVSKD--EEHWWTAQNISGEVGSIPVPY 162
+V+ YD+D D +L ++++ V +E + + + G +PV Y
Sbjct: 3 RVL--YDYDAEDSTELSLLADEVITVYELPGMDEDYMMGER-GSQRGKVPVAY 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 = 26.4 bits (58), Expect = 3.2
Identities = 11/48 (22%), Positives = 20/48 (41%), Gaps = 1/48 (2%)
Query: 117 YDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQ 164
+DF DDL +I+ ++ K + W+ G P +V+
Sbjct: 6 HDFPAEHSDDLSLNSGEIVYLLEKIDTEWYRG-KCKNTTGIFPANHVK 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 = 25.8 bits (57), Expect = 4.5
Identities = 14/53 (26%), Positives = 29/53 (54%), Gaps = 3/53 (5%)
Query: 113 VIAKYDFDGNDPDDLPFKKNDILIVVSKDEEHWWTAQNISGEVGSIPVPYVQK 165
V+A D+ P+++ + D++ V+ K+E WW ++ E G +P Y++
Sbjct: 4 VVA--DYKKQQPNEISLRAGDVVDVIEKNENGWWFV-SLEDEQGWVPATYLEP 53
>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 = 27.2 bits (60), Expect = 5.4
Identities = 14/47 (29%), Positives = 27/47 (57%), Gaps = 1/47 (2%)
Query: 7 PHDRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVK 53
PH + G + +Q+A +L+++ D G FL+R S++ +G + K
Sbjct: 15 PHWNDGAILGFVNKQQAHDLLINKPD-GTFLLRFSDSEIGGITIAWK 60
>gnl|CDD|128856 smart00588, NEUZ, domain in neuralized proteins.
Length = 123
Score = 27.3 bits (61), Expect = 5.6
Identities = 18/60 (30%), Positives = 25/60 (41%), Gaps = 2/60 (3%)
Query: 208 ARVKQVRVPNAYDKTALKLEIGDIIKVTKTNINGQWEGELN-GKTGHFPFT-HVEFIPTN 265
AR NA +A L I ++ +V + +W G L G T P T +PTN
Sbjct: 22 ARRSASDFCNALVFSARPLRINELFEVKIEKVVRKWSGALRFGVTTCDPATLRPASLPTN 81
>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 = 26.5 bits (58), Expect = 9.7
Identities = 14/47 (29%), Positives = 27/47 (57%), Gaps = 1/47 (2%)
Query: 7 PHDRNSWYFGMMTRQEAQAILLSEKDNGAFLVRDSNTILGNYVLCVK 53
PH + G + +Q+A +L+++ D G FL+R S++ +G + K
Sbjct: 15 PHWNDGAILGFVNKQQAHDLLINKPD-GTFLLRFSDSEIGGITIAWK 60
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
0.315 0.133 0.394
Gapped
Lambda K H
0.267 0.0729 0.140
Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 44354
Number of Hits to DB: 14,437,059
Number of extensions: 1348248
Number of successful extensions: 1446
Number of sequences better than 10.0: 1
Number of HSP's gapped: 1350
Number of HSP's successfully gapped: 443
Length of query: 288
Length of database: 10,937,602
Length adjustment: 96
Effective length of query: 192
Effective length of database: 6,679,618
Effective search space: 1282486656
Effective search space used: 1282486656
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: 42 (22.0 bits)
S2: 58 (26.1 bits)