RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy13524
(235 letters)
>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 = 115 bits (289), Expect = 1e-33
Identities = 44/59 (74%), Positives = 53/59 (89%)
Query: 133 KKRIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVEDL 191
++R+ AILPY K+PDTDEL+FQKGDIF VHNEL DGWLWVT+ RTGE G++FRDLVE+L
Sbjct: 1 RRRVRAILPYNKVPDTDELSFQKGDIFVVHNELEDGWLWVTSLRTGESGLVFRDLVEEL 59
>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 = 95.2 bits (237), Expect = 1e-25
Identities = 30/54 (55%), Positives = 38/54 (70%), Gaps = 1/54 (1%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAV-RYLMGGRTFECLDAVINRY 53
SFLVR SDN+PGDYSL F +N I+ F+I +++MGGR F LD VI+RY
Sbjct: 24 SFLVRESDNTPGDYSLSFRVNEGIKHFKIIPTGNNQFMMGGRYFSSLDDVIDRY 77
Score = 40.5 bits (95), Expect = 4e-05
Identities = 14/32 (43%), Positives = 22/32 (68%), Gaps = 1/32 (3%)
Query: 203 WFHPECTKNDAVDMLVKAGPV-NFTISESDST 233
WFH + ++ +A +MLVK G +F + ESD+T
Sbjct: 2 WFHGKISREEAYNMLVKVGGPGSFLVRESDNT 33
>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 = 76.8 bits (189), Expect = 3e-18
Identities = 25/35 (71%), Positives = 29/35 (82%)
Query: 82 FRVTAVCGDFYIGGRQFDSLSDLISYYSSCSDLLK 116
FR+ A+CGD+YIGGR+F SLSDLI YYS S LLK
Sbjct: 69 FRIIAMCGDYYIGGRRFSSLSDLIGYYSHVSCLLK 103
Score = 41.7 bits (98), Expect = 2e-05
Identities = 20/53 (37%), Positives = 26/53 (49%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRTFECLDAVINRY 53
S+L+R SD PG + L F + FRI Y +GGR F L +I Y
Sbjct: 43 SYLIRESDRRPGSFVLSFLSRTGVNHFRIIAMCGDYYIGGRRFSSLSDLIGYY 95
>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 = 64.6 bits (158), Expect = 8e-14
Identities = 22/61 (36%), Positives = 34/61 (55%), Gaps = 2/61 (3%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VRYLMGGRTFECLDAVINRYRKEQI 58
FLVR S++SPGDY L + +++ +RI + YL GGR F L ++ Y+K +
Sbjct: 24 DFLVRDSESSPGDYVLSVRVKGKVKHYRIRRNEDGKFYLEGGRKFPSLVELVEHYQKNSL 83
Query: 59 V 59
Sbjct: 84 G 84
Score = 28.0 bits (63), Expect = 1.4
Identities = 8/33 (24%), Positives = 18/33 (54%)
Query: 202 DWFHPECTKNDAVDMLVKAGPVNFTISESDSTF 234
W+H ++ +A +L G +F + +S+S+
Sbjct: 2 PWYHGFISREEAEKLLKNEGDGDFLVRDSESSP 34
>gnl|CDD|215658 pfam00017, SH2, SH2 domain.
Length = 77
Score = 52.2 bits (126), Expect = 2e-09
Identities = 19/55 (34%), Positives = 32/55 (58%), Gaps = 2/55 (3%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VRYLMGGRTFECLDAVINRY 53
+FLVR S++ PGDY+L + +++ +RI+ Y+ GG TF L ++ Y
Sbjct: 23 TFLVRESESKPGDYTLSVRDDGRVKHYRIQSLDNGGYYISGGVTFNSLPELVEHY 77
Score = 26.0 bits (58), Expect = 6.2
Identities = 9/32 (28%), Positives = 18/32 (56%), Gaps = 1/32 (3%)
Query: 203 WFHPECTKNDAVDMLVKAGPV-NFTISESDST 233
W+H + ++ +A +L+ P F + ES+S
Sbjct: 1 WYHGKISREEAERLLLNPKPDGTFLVRESESK 32
>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 = 51.9 bits (125), Expect = 5e-09
Identities = 20/70 (28%), Positives = 38/70 (54%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRTFECLDAVINRYRKEQIVE 60
+FLVRPS+ P +++ F +I+ RI+++ +++G FE L +++ Y K +
Sbjct: 28 AFLVRPSETDPNSFAISFRAEGKIKHCRIKQEGRLFVIGTSQFESLVELVSYYEKHPLYR 87
Query: 61 GHTLGFPVTR 70
L +PV
Sbjct: 88 KIKLRYPVNE 97
Score = 28.4 bits (64), Expect = 1.2
Identities = 7/15 (46%), Positives = 9/15 (60%)
Query: 203 WFHPECTKNDAVDML 217
WFH T+ A +ML
Sbjct: 6 WFHANLTREQAEEML 20
>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 = 49.1 bits (118), Expect = 2e-08
Identities = 19/52 (36%), Positives = 29/52 (55%), Gaps = 2/52 (3%)
Query: 132 DKKRIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
+ ++ A+ YT D DEL+F+KGDI V + DGW R G++G+
Sbjct: 1 EGPQVRALYDYTA-QDPDELSFKKGDIITVLEKSDDGWWKGRLGR-GKEGLF 50
>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 = 48.7 bits (117), Expect = 2e-08
Identities = 20/47 (42%), Positives = 28/47 (59%), Gaps = 2/47 (4%)
Query: 137 VAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
VA+ YT DEL+F+KGDI V + DGW W + G++G+I
Sbjct: 1 VALYDYTAREP-DELSFKKGDIIIVLEKSDDGW-WKGRLKGGKEGLI 45
>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 = 48.9 bits (117), Expect = 3e-08
Identities = 21/55 (38%), Positives = 31/55 (56%), Gaps = 1/55 (1%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 189
R A+ Y D DE++FQ+GD+ + DGW+ T RTG+ GM+ + VE
Sbjct: 1 RYRAMYDYAAA-DDDEVSFQEGDVIINVEIIDDGWMEGTVQRTGQSGMLPANYVE 54
>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 = 47.3 bits (112), Expect = 1e-07
Identities = 22/56 (39%), Positives = 32/56 (57%), Gaps = 1/56 (1%)
Query: 134 KRIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 189
KR A+ Y D DE++FQ GD ++ DGW++ T RTG+ GM+ + VE
Sbjct: 3 KRYRAVYDYNA-ADEDEVSFQDGDTIVNVQQIDDGWMYGTVERTGDTGMLPANYVE 57
>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 = 46.5 bits (111), Expect = 4e-07
Identities = 20/62 (32%), Positives = 33/62 (53%), Gaps = 2/62 (3%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQ-IQRFRIEKKAVRYLMGGR-TFECLDAVINRYRKEQI 58
SFLVR S + PGD+ L ++ + I + +Y +GG F+ L ++ Y+K +
Sbjct: 24 SFLVRESQSKPGDFVLSVRTDDDKVTHIMIRCQGGKYDVGGGEEFDSLTDLVEHYKKNPM 83
Query: 59 VE 60
VE
Sbjct: 84 VE 85
Score = 27.6 bits (62), Expect = 1.9
Identities = 10/22 (45%), Positives = 16/22 (72%), Gaps = 1/22 (4%)
Query: 89 GDFYIGGRQ-FDSLSDLISYYS 109
G + +GG + FDSL+DL+ +Y
Sbjct: 58 GKYDVGGGEEFDSLTDLVEHYK 79
>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 = 45.9 bits (109), Expect = 5e-07
Identities = 19/57 (33%), Positives = 30/57 (52%), Gaps = 4/57 (7%)
Query: 1 SFLVRPSDNSPGDYSL-FFHINNQIQRFRIEKKAVRYLMG---GRTFECLDAVINRY 53
+FLVR S + PGDY L + +++ + IE+ Y + GRTF L ++ Y
Sbjct: 23 TFLVRESSSEPGDYVLSVRSGDGKVKHYLIERNEGGYYLLGGSGRTFPSLPELVEHY 79
>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 = 46.2 bits (110), Expect = 6e-07
Identities = 21/63 (33%), Positives = 32/63 (50%), Gaps = 5/63 (7%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVR-----YLMGGRTFECLDAVINRYRK 55
+FLVR S+ GDY+L F N ++Q RI + YL F+ L +I+ YR+
Sbjct: 32 TFLVRESETFVGDYTLSFWRNGKVQHCRIRSRQENGEKKYYLTDNLVFDSLYELIDYYRQ 91
Query: 56 EQI 58
+
Sbjct: 92 NPL 94
>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 = 45.2 bits (107), Expect = 1e-06
Identities = 18/57 (31%), Positives = 33/57 (57%)
Query: 2 FLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRTFECLDAVINRYRKEQI 58
FL+R S+++PGDYS+ + + F+++ Y +G R F +D ++ Y+K I
Sbjct: 26 FLIRDSESNPGDYSVSLKAPGRNKHFKVQVVDNVYCIGQRKFHTMDELVEHYKKAPI 82
Score = 27.1 bits (60), Expect = 2.9
Identities = 9/27 (33%), Positives = 17/27 (62%)
Query: 82 FRVTAVCGDFYIGGRQFDSLSDLISYY 108
F+V V + IG R+F ++ +L+ +Y
Sbjct: 51 FKVQVVDNVYCIGQRKFHTMDELVEHY 77
>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 = 43.2 bits (103), Expect = 2e-06
Identities = 17/47 (36%), Positives = 24/47 (51%), Gaps = 2/47 (4%)
Query: 137 VAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
A+ Y D DEL+F+KGDI V + DGW + G +G+
Sbjct: 3 RALYDYEA-QDDDELSFKKGDIITVLEKDDDGWWEGELNG-GREGLF 47
>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 = 43.1 bits (101), Expect = 7e-06
Identities = 17/57 (29%), Positives = 33/57 (57%)
Query: 2 FLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRTFECLDAVINRYRKEQI 58
FL+R S++SP D+S+ + + F+++ K Y +G R F ++ ++ Y+K I
Sbjct: 26 FLIRDSESSPNDFSVSLKAQGKNKHFKVQLKECVYCIGQRKFSSMEELVEHYKKAPI 82
>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 = 41.7 bits (98), Expect = 9e-06
Identities = 23/56 (41%), Positives = 31/56 (55%), Gaps = 3/56 (5%)
Query: 135 RIVAILPYTKMPDTD-ELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 189
R I+PY P ++ EL ++GDI FVH + DGW T RTG+ G+ VE
Sbjct: 1 RYRVIVPYP--PQSEAELELKEGDIVFVHKKREDGWFKGTLQRTGKTGLFPGSFVE 54
>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 = 42.8 bits (101), Expect = 1e-05
Identities = 18/58 (31%), Positives = 31/58 (53%), Gaps = 1/58 (1%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRY-LMGGRTFECLDAVINRYRKEQ 57
SFL RPS ++PGD++L +++ +I+ Y L GG F L ++ Y ++
Sbjct: 24 SFLARPSKSNPGDFTLSVRRGDEVTHIKIQNTGDYYDLYGGEKFATLSELVQYYMEQH 81
Score = 31.6 bits (72), Expect = 0.079
Identities = 14/33 (42%), Positives = 20/33 (60%), Gaps = 3/33 (9%)
Query: 89 GDFY--IGGRQFDSLSDLISYYSSCSDLLKRER 119
GD+Y GG +F +LS+L+ YY L RE+
Sbjct: 56 GDYYDLYGGEKFATLSELVQYYMEQHGQL-REK 87
>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 = 41.4 bits (98), Expect = 1e-05
Identities = 15/47 (31%), Positives = 24/47 (51%), Gaps = 1/47 (2%)
Query: 137 VAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
VA+ Y D D+L+F+KGD + ++ W TG++G I
Sbjct: 3 VALYDYEARTD-DDLSFKKGDRLQILDDSDGDWWLARHLSTGKEGYI 48
>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 = 41.2 bits (96), Expect = 4e-05
Identities = 17/57 (29%), Positives = 32/57 (56%)
Query: 2 FLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRTFECLDAVINRYRKEQI 58
FL+R S++SP D+S+ + + F+++ Y +G R F +D ++ Y+K I
Sbjct: 26 FLIRDSESSPSDFSVSLKAVGKNKHFKVQLVDNVYCIGQRRFNSMDELVEHYKKAPI 82
>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 = 39.6 bits (93), Expect = 5e-05
Identities = 17/35 (48%), Positives = 24/35 (68%), Gaps = 1/35 (2%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGW 169
++VA+ YT D DEL+FQ+GDI +V + DGW
Sbjct: 1 KVVALYDYTADKD-DELSFQEGDIIYVTKKNDDGW 34
>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 = 39.6 bits (92), Expect = 5e-05
Identities = 16/45 (35%), Positives = 27/45 (60%)
Query: 147 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVEDL 191
D DE++F+ GD + +GW++ T RTG+ GM+ + VE +
Sbjct: 14 DDDEVSFKDGDTIVNVQTIDEGWMYGTVQRTGKTGMLPANYVEAI 58
>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 = 39.6 bits (93), Expect = 7e-05
Identities = 21/53 (39%), Positives = 28/53 (52%), Gaps = 6/53 (11%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFFV-----HNELGDGWLWVTAHRTGEQGM 182
++ A YT DTDELTF+KGD+ V E +GWL TG +G+
Sbjct: 4 KVRATHDYTAE-DTDELTFEKGDVILVIPFDDPEEQDEGWLMGVKESTGCRGV 55
>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 = 39.9 bits (93), Expect = 8e-05
Identities = 19/55 (34%), Positives = 29/55 (52%), Gaps = 2/55 (3%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VRYLMGGRTFECLDAVINRY 53
+FL+RPS++S G YSL ++ +RI YL GR F L+ ++ Y
Sbjct: 25 AFLIRPSESSLGGYSLSVRAQAKVCHYRICMAPSGSLYLQKGRLFPGLEELLAYY 79
>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 = 39.2 bits (91), Expect = 8e-05
Identities = 15/43 (34%), Positives = 25/43 (58%)
Query: 147 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 189
D DE++F+ GD + +GW++ T RTG GM+ + +E
Sbjct: 13 DEDEVSFRDGDYIVNVQPIDEGWMYGTVQRTGRTGMLPANYIE 55
>gnl|CDD|212873 cd11940, SH3_ARHGEF5_19, Src homology 3 domain of the Rho guanine
nucleotide exchange factors ARHGEF5 and ARHGEF19.
ARHGEF5, also called ephexin-3 or TIM (Transforming
immortalized mammary oncogene), is a potent activator of
RhoA and it plays roles in regulating cell shape,
adhesion, and migration. It binds to the SH3 domain of
Src and is involved in regulating Src-induced podosome
formation. ARHGEF19, also called ephexin-2 or WGEF
(weak-similarity GEF), is highly expressed in the
intestine, liver, heart and kidney. It activates RhoA,
Cdc42, and Rac 1, and has been shown to activate RhoA in
the Wnt-PCP (planar cell polarity) pathway. It is
involved in the regulation of cell polarity and
cytoskeletal reorganization. ARHGEF5 and ARHGEF19
contain RhoGEF (also called Dbl-homologous or DH),
Pleckstrin Homology (PH), and SH3 domains. The SH3
domains of ARHGEFs play an autoinhibitory role through
intramolecular interactions with a proline-rich region
N-terminal to the DH domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 37.8 bits (88), Expect = 3e-04
Identities = 15/33 (45%), Positives = 18/33 (54%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 181
DELT +K DI V + DGWL GE+G
Sbjct: 14 DELTLEKADIIMVRQQSSDGWLEGVRLSDGERG 46
>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 = 36.9 bits (86), Expect = 5e-04
Identities = 10/35 (28%), Positives = 23/35 (65%), Gaps = 1/35 (2%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
+L+F+KG++ + ++ DGW W+ + G +G++
Sbjct: 14 GDLSFKKGEVLRIISKRADGW-WLAENSKGNRGLV 47
>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 = 35.8 bits (83), Expect = 0.001
Identities = 17/37 (45%), Positives = 20/37 (54%), Gaps = 2/37 (5%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLW 171
R A+ YT DEL+ Q GDI VH + DGW W
Sbjct: 1 RCKALYSYTA-NREDELSLQPGDIIEVHEKQDDGW-W 35
>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 = 36.6 bits (85), Expect = 0.001
Identities = 19/55 (34%), Positives = 26/55 (47%), Gaps = 2/55 (3%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLM--GGRTFECLDAVINRY 53
SFLVR S PG Y L N + F I+ + ++ G FE L+ +I Y
Sbjct: 25 SFLVRYSRRRPGGYVLTLVYENHVYHFEIQNRDDKWFYIDDGPYFESLEHLIEHY 79
>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 = 35.4 bits (82), Expect = 0.002
Identities = 19/48 (39%), Positives = 28/48 (58%), Gaps = 1/48 (2%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGM 182
VA+ PY K DEL +KG+++ V + DGW T+ RTG+ G+
Sbjct: 1 IYVALYPY-KPQKPDELELRKGEMYTVTEKCQDGWFKGTSLRTGQSGV 47
>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 = 35.3 bits (81), Expect = 0.002
Identities = 19/46 (41%), Positives = 26/46 (56%), Gaps = 1/46 (2%)
Query: 137 VAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGM 182
VAI PYT + DEL +KG++F V DGW T+ T + G+
Sbjct: 3 VAIYPYTPRKE-DELELRKGEMFLVFERCQDGWFKGTSMHTSKIGV 47
>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 = 35.5 bits (82), Expect = 0.002
Identities = 18/47 (38%), Positives = 25/47 (53%), Gaps = 3/47 (6%)
Query: 138 AILPYTKMP-DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
A+ PY P D +EL+F+KG+I V + G W W GE G+
Sbjct: 4 ALYPYDASPDDPNELSFEKGEILEVSDTSGK-W-WQARKSNGETGIC 48
>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 = 35.7 bits (83), Expect = 0.003
Identities = 18/59 (30%), Positives = 35/59 (59%), Gaps = 1/59 (1%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEK-KAVRYLMGGRTFECLDAVINRYRKEQI 58
+FL+R S++SPGD+SL N +Q F++ + A +Y + F L+ +++ +R +
Sbjct: 27 AFLIRESESSPGDFSLSVKFGNDVQHFKVLRDGAGKYFLWVVKFNSLNELVDYHRTTSV 85
Score = 25.7 bits (57), Expect = 8.3
Identities = 11/33 (33%), Positives = 20/33 (60%), Gaps = 1/33 (3%)
Query: 202 DWFHPECTKNDAVDMLVKAGPVN-FTISESDST 233
WFH + ++ +A ++L+ P F I ES+S+
Sbjct: 4 PWFHGKISRAEAEEILMNQRPDGAFLIRESESS 36
>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 = 34.6 bits (80), Expect = 0.003
Identities = 14/35 (40%), Positives = 19/35 (54%), Gaps = 1/35 (2%)
Query: 150 ELTFQKGDIFFVHN-ELGDGWLWVTAHRTGEQGMI 183
EL+F KGD F V E W T TG++G++
Sbjct: 15 ELSFSKGDFFHVIGEEDQGEWYEATNPVTGKRGLV 49
>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 = 34.2 bits (78), Expect = 0.004
Identities = 17/36 (47%), Positives = 25/36 (69%), Gaps = 1/36 (2%)
Query: 134 KRIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGW 169
+++VAI YTK + DEL+FQ+G I +V + DGW
Sbjct: 3 EKVVAIYDYTKDKE-DELSFQEGAIIYVIKKNDDGW 37
>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 = 35.0 bits (81), Expect = 0.006
Identities = 18/63 (28%), Positives = 29/63 (46%), Gaps = 13/63 (20%)
Query: 2 FLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGR-------TFECLDAVINRYR 54
FLVR S N PGDY+L +++ +R+ + G+ FE L ++ Y
Sbjct: 27 FLVRESTNYPGDYTLCVSFEGKVEHYRVIYR------NGKLTIDEEEYFENLIQLVEHYT 80
Query: 55 KEQ 57
K+
Sbjct: 81 KDA 83
>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 = 33.9 bits (78), Expect = 0.009
Identities = 18/55 (32%), Positives = 26/55 (47%), Gaps = 3/55 (5%)
Query: 2 FLVRPSDNSPGDYSLFFHINNQIQRFRIEKK---AVRYLMGGRTFECLDAVINRY 53
FLVR S ++PGDY L ++ ++I + A G F LD +I Y
Sbjct: 27 FLVRESTSAPGDYVLSLLAQGEVLHYQIRRHGEDAFFSDDGPLIFHGLDTLIEHY 81
>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 = 33.3 bits (76), Expect = 0.010
Identities = 17/55 (30%), Positives = 27/55 (49%), Gaps = 1/55 (1%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 189
R VA+ + D +EL F +G I F+ + G GWL G+ G++ + V
Sbjct: 1 RAVALYDFEPEHD-NELGFAEGQILFILYKHGQGWLIAEDESGGKTGLVPEEFVS 54
>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 = 33.1 bits (75), Expect = 0.011
Identities = 16/35 (45%), Positives = 23/35 (65%), Gaps = 1/35 (2%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGW 169
++VAI Y+K D DEL+F +G I +V + DGW
Sbjct: 1 KVVAIYDYSKDKD-DELSFMEGAIIYVIKKNDDGW 34
>gnl|CDD|212725 cd11791, SH3_UBASH3, Src homology 3 domain of Ubiquitin-associated
and SH3 domain-containing proteins, also called TULA (T
cell Ubiquitin LigAnd) family of proteins. UBASH3 or
TULA proteins are also referred to as Suppressor of T
cell receptor Signaling (STS) proteins. They contain an
N-terminal UBA domain, a central SH3 domain, and a
C-terminal histidine phosphatase domain. They bind c-Cbl
through the SH3 domain and to ubiquitin via UBA. In some
vertebrates, there are two TULA family proteins, called
UBASH3A (also called TULA or STS-2) and UBASH3B (also
called TULA-2 or STS-1), which show partly overlapping
as well as distinct functions. UBASH3B is widely
expressed while UBASH3A is only found in lymphoid cells.
UBASH3A facilitates apoptosis induced in T cells through
its interaction with the apoptosis-inducing factor AIF.
UBASH3B is an active phosphatase while UBASH3A is not.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 33.0 bits (76), Expect = 0.012
Identities = 17/50 (34%), Positives = 24/50 (48%), Gaps = 7/50 (14%)
Query: 138 AILPYTKMP-DTDELTFQKGDIFFVH----NELGDGWLWVTAHRTGEQGM 182
+ PYT P + DEL GD +V + DGW+ T+ TG G+
Sbjct: 4 VLYPYT--PQEEDELELVPGDYIYVSPEELDSSSDGWVEGTSWLTGCSGL 51
>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 = 34.1 bits (79), Expect = 0.012
Identities = 18/63 (28%), Positives = 30/63 (47%), Gaps = 7/63 (11%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYL-MGG------RTFECLDAVINRY 53
+FL+R S+ +PG YSL + + ++ +R L GG TF L ++ Y
Sbjct: 28 TFLIRESETTPGAYSLSVRDGDDARGDTVKHYRIRKLDNGGYYITTRATFPTLQELVQHY 87
Query: 54 RKE 56
K+
Sbjct: 88 SKD 90
Score = 30.6 bits (70), Expect = 0.18
Identities = 10/26 (38%), Positives = 16/26 (61%), Gaps = 1/26 (3%)
Query: 89 GDFYIGGR-QFDSLSDLISYYSSCSD 113
G +YI R F +L +L+ +YS +D
Sbjct: 67 GGYYITTRATFPTLQELVQHYSKDAD 92
>gnl|CDD|212714 cd11780, SH3_Sorbs_3, Third (or C-terminal) Src Homology 3 domain
of Sorbin and SH3 domain containing (Sorbs) proteins and
similar domains. This family, also called the vinexin
family, is composed predominantly of adaptor proteins
containing one sorbin homology (SoHo) and three SH3
domains. Members include the third SH3 domains of Sorbs1
(or ponsin), Sorbs2 (or ArgBP2), Vinexin (or Sorbs3),
and similar domains. They are involved in the regulation
of cytoskeletal organization, cell adhesion, and growth
factor signaling. Members of this family bind multiple
partners including signaling molecules like c-Abl,
c-Arg, Sos, and c-Cbl, as well as cytoskeletal molecules
such as vinculin and afadin. They may have overlapping
functions. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 33.0 bits (76), Expect = 0.012
Identities = 19/47 (40%), Positives = 26/47 (55%), Gaps = 1/47 (2%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 181
R A+ YT + DEL ++GDI +V + DGW T+ RTG G
Sbjct: 1 RYRALYSYTPQNE-DELELREGDIVYVMEKCDDGWFVGTSERTGLFG 46
>gnl|CDD|212870 cd11937, SH3_UBASH3A, Src homology 3 domain of Ubiquitin-associated
and SH3 domain-containing protein A. UBASH3A is also
called Cbl-Interacting Protein 4 (CLIP4), T cell
Ubiquitin LigAnd (TULA), or T cell receptor Signaling
(STS)-2. It is only found in lymphoid cells and exhibits
weak phosphatase activity. UBASH3A facilitates T
cell-induced apoptosis through interaction with the
apoptosis-inducing factor AIF. It is involved in
regulating the level of phosphorylation of the
zeta-associated protein (ZAP)-70 tyrosine kinase. TULA
proteins contain an N-terminal UBA domain, a central SH3
domain, and a C-terminal histidine phosphatase domain.
They bind c-Cbl through the SH3 domain and to ubiquitin
via UBA. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 60
Score = 33.1 bits (75), Expect = 0.013
Identities = 18/50 (36%), Positives = 26/50 (52%), Gaps = 5/50 (10%)
Query: 138 AILPYTKMPDTDELTFQKGDIFFV----HNELGDGWLWVTAHRTGEQGMI 183
A+ Y K + DEL GD FV +E +GW+ +HRTG +G +
Sbjct: 5 ALFQY-KPQNIDELMLSPGDYIFVDPTQQSEASEGWVIGISHRTGCRGFL 53
>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 = 32.7 bits (75), Expect = 0.014
Identities = 12/25 (48%), Positives = 15/25 (60%), Gaps = 1/25 (4%)
Query: 147 DTDELTFQKGDIFFVHNELGDGWLW 171
+ DEL+F KGDI V + GW W
Sbjct: 12 NEDELSFDKGDIITVTQVVEGGW-W 35
>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 = 32.6 bits (74), Expect = 0.017
Identities = 12/21 (57%), Positives = 15/21 (71%)
Query: 150 ELTFQKGDIFFVHNELGDGWL 170
ELT QKGDI ++H E+ WL
Sbjct: 16 ELTLQKGDIVYIHKEVDKNWL 36
>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 = 33.6 bits (77), Expect = 0.018
Identities = 18/60 (30%), Positives = 30/60 (50%), Gaps = 7/60 (11%)
Query: 1 SFLVRPSDNSPGDYSL-----FFHINNQIQRFRIEK--KAVRYLMGGRTFECLDAVINRY 53
SFL+R S+ G YSL + ++ +RI + Y+ TF+CL+ ++N Y
Sbjct: 35 SFLIRESETRRGCYSLSVRHRGSQSRDSVKHYRIFRLDNGWFYISPRLTFQCLEDMVNHY 94
Score = 29.4 bits (66), Expect = 0.52
Identities = 15/36 (41%), Positives = 21/36 (58%), Gaps = 3/36 (8%)
Query: 81 IFRVTAVCGDFYIGGRQ-FDSLSDLISYYSSCSDLL 115
IFR+ G FYI R F L D++++YS +D L
Sbjct: 68 IFRLDN--GWFYISPRLTFQCLEDMVNHYSESADGL 101
>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 = 32.4 bits (74), Expect = 0.019
Identities = 16/36 (44%), Positives = 24/36 (66%), Gaps = 2/36 (5%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFFVHN-ELGDGW 169
+++A+ PYT + DEL+FQKGDI V + + D W
Sbjct: 1 QVIALFPYTAQNE-DELSFQKGDIINVLSKDDPDWW 35
>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 = 32.1 bits (73), Expect = 0.023
Identities = 18/47 (38%), Positives = 26/47 (55%), Gaps = 2/47 (4%)
Query: 137 VAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
VA+ + + ++DEL FQKGDI + N + D W A G +G I
Sbjct: 3 VALYSF-QATESDELPFQKGDILKILN-MEDDQNWYKAELQGREGYI 47
>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 = 33.2 bits (76), Expect = 0.023
Identities = 26/77 (33%), Positives = 38/77 (49%), Gaps = 7/77 (9%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRI-----EKKAVRYLMG--GRTFECLDAVINRY 53
SFLVR S++ G Y+L N + +RI +K +V+ G R F L +I Y
Sbjct: 27 SFLVRDSESVSGAYALCVLYQNCVHTYRILPNAEDKLSVQASEGVPVRFFTTLPELIEFY 86
Query: 54 RKEQIVEGHTLGFPVTR 70
+KE + L +PV R
Sbjct: 87 QKENMGLVTHLLYPVER 103
>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 = 31.9 bits (72), Expect = 0.026
Identities = 17/41 (41%), Positives = 24/41 (58%), Gaps = 1/41 (2%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 189
DEL+F++GDI V NE D W A G+ G I ++ +E
Sbjct: 15 DELSFKRGDILKVLNEECDQ-NWYKAELNGKDGFIPKNYIE 54
>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 = 33.1 bits (75), Expect = 0.027
Identities = 22/74 (29%), Positives = 36/74 (48%), Gaps = 6/74 (8%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRT--FECLDAVINRYRKEQI 58
S+LVR S S DYSL N ++ K +Y++G + F+ + VI+ Y ++
Sbjct: 24 SYLVRNSQTSKHDYSLSLKSNQGFMHMKLAKTKEKYVLGQNSPPFDSVPEVIHYYTTRKL 83
Query: 59 ----VEGHTLGFPV 68
E +L +PV
Sbjct: 84 PIKGAEHLSLLYPV 97
>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 = 33.2 bits (76), Expect = 0.029
Identities = 19/59 (32%), Positives = 29/59 (49%), Gaps = 6/59 (10%)
Query: 2 FLVRPSDNSPGDYSLFFHINNQIQRFRIEK------KAVRYLMGGRTFECLDAVINRYR 54
FLVR S PGDY L N+++ + I RY +G + F+ L A++ Y+
Sbjct: 31 FLVRDSSTIPGDYVLSVSENSRVSHYIINSLGQPAPNQSRYRIGDQEFDDLPALLEFYK 89
>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 = 31.7 bits (73), Expect = 0.034
Identities = 14/44 (31%), Positives = 24/44 (54%), Gaps = 2/44 (4%)
Query: 146 PDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 189
D +EL+ +KGD+ V ++ +GW R G +G++ VE
Sbjct: 11 TDPNELSLKKGDVVKVLDKDDNGWWEGE--RGGRRGLVPSSYVE 52
>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 = 32.8 bits (75), Expect = 0.038
Identities = 21/62 (33%), Positives = 32/62 (51%), Gaps = 15/62 (24%)
Query: 1 SFLVRPSDNSPGDYSL-------FFHINNQIQRFRIEKKAVRYLMG--GRTFECLDAVIN 51
S+LVR S+++ DYSL F H+ +IQR + Y++G R FE + +I
Sbjct: 24 SYLVRNSESTKQDYSLSLKSAKGFMHM--RIQRNETGQ----YILGQFSRPFETIPEMIR 77
Query: 52 RY 53
Y
Sbjct: 78 HY 79
>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 = 31.2 bits (71), Expect = 0.042
Identities = 18/43 (41%), Positives = 25/43 (58%), Gaps = 2/43 (4%)
Query: 147 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 189
DTDEL+F +GDI + E GW W T G++G+ + VE
Sbjct: 12 DTDELSFNEGDIIEILKEDPSGW-W-TGRLRGKEGLFPGNYVE 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 = 31.2 bits (71), Expect = 0.043
Identities = 15/37 (40%), Positives = 23/37 (62%), Gaps = 2/37 (5%)
Query: 147 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
+ DEL+ KGD+ V + DGW W T R G++G++
Sbjct: 12 EDDELSISKGDVVAVIEKGEDGW-W-TVERNGQKGLV 46
>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 = 31.5 bits (72), Expect = 0.044
Identities = 14/33 (42%), Positives = 20/33 (60%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 181
DELT ++GD+ V ++ DGW R GE+G
Sbjct: 14 DELTLEEGDVVNVLRKMPDGWYEGERLRDGERG 46
>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 = 31.2 bits (71), Expect = 0.047
Identities = 16/45 (35%), Positives = 26/45 (57%), Gaps = 6/45 (13%)
Query: 142 YTKMPDT-DELTFQKGDIFFV---HNELGDGWLWVTAHRTGEQGM 182
Y + ++ DEL F++GDI V + +GW W+ + R G QG+
Sbjct: 6 YDNVAESPDELAFRRGDILTVLEQNTAGLEGW-WLCSLR-GRQGI 48
>gnl|CDD|212871 cd11938, SH3_ARHGEF16_26, Src homology 3 domain of the Rho guanine
nucleotide exchange factors ARHGEF16 and ARHGEF26.
ARHGEF16, also called ephexin-4, acts as a GEF for RhoG,
activating it by exchanging bound GDP for free GTP. RhoG
is a small GTPase that is a crucial regulator of Rac in
migrating cells. ARHGEF16 interacts directly with the
ephrin receptor EphA2 and mediates cell migration and
invasion in breast cancer cells by activating RhoG.
ARHGEF26, also called SGEF (SH3 domain-containing
guanine exchange factor), also activates RhoG. It is
highly expressed in liver and may play a role in
regulating membrane dynamics. ARHGEF16 and ARHGEF26
contain RhoGEF (also called Dbl-homologous or DH),
Pleckstrin Homology (PH), and SH3 domains. The SH3
domains of ARHGEFs play an autoinhibitory role through
intramolecular interactions with a proline-rich region
N-terminal to the DH domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 31.0 bits (70), Expect = 0.061
Identities = 13/35 (37%), Positives = 18/35 (51%)
Query: 147 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 181
DEL+ Q+ D+ V DGW + R GE+G
Sbjct: 12 QPDELSLQQADVVLVLQTESDGWYYGERLRDGERG 46
>gnl|CDD|212858 cd11925, SH3_SH3RF3_3, Third Src Homology 3 domain of SH3 domain
containing ring finger 3, an E3 ubiquitin-protein
ligase. SH3RF3 is also called POSH2 (Plenty of SH3s 2)
or SH3MD4 (SH3 multiple domains protein 4). It is a
scaffold protein with E3 ubiquitin-protein ligase
activity. It was identified in the screen for
interacting partners of p21-activated kinase 2 (PAK2).
It may play a role in regulating JNK mediated apoptosis
in certain conditions. It also interacts with GTP-loaded
Rac1. SH3RF3 is highly homologous to SH3RF1; it also
contains an N-terminal RING finger domain and four SH3
domains. This model represents the third SH3 domain,
located in the middle, of SH3RF3. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 57
Score = 31.1 bits (70), Expect = 0.063
Identities = 14/35 (40%), Positives = 21/35 (60%)
Query: 148 TDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGM 182
DEL +KG+++ V + DGW T+ RTG G+
Sbjct: 14 NDELELRKGEMYRVIEKCQDGWFKGTSLRTGVSGV 48
>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 = 30.9 bits (70), Expect = 0.065
Identities = 14/39 (35%), Positives = 19/39 (48%), Gaps = 1/39 (2%)
Query: 146 PDTDELTFQKGDIF-FVHNELGDGWLWVTAHRTGEQGMI 183
P EL F KGDI V GW + +GE+G++
Sbjct: 13 PKPGELAFHKGDIVTIVETCERKGWYRARHNTSGEEGLV 51
>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 = 30.8 bits (70), Expect = 0.070
Identities = 14/32 (43%), Positives = 19/32 (59%), Gaps = 2/32 (6%)
Query: 151 LTFQKGDIFFVHNELGDGWLWVTAHRTGEQGM 182
L+FQKGDI V ++ W W A+R GE+
Sbjct: 23 LSFQKGDILHVISQEDPNW-W-QAYREGEEDN 52
>gnl|CDD|212955 cd12022, SH3_p47phox_2, Second or C-terminal Src homology 3 domain
of the p47phox subunit of NADPH oxidase, also called
Neutrophil Cytosolic Factor 1. p47phox, or NCF1, is a
cytosolic subunit of the phagocytic NADPH oxidase
complex (also called Nox2 or gp91phox), which plays a
key role in the ability of phagocytes to defend against
bacterial infections. NADPH oxidase catalyzes the
transfer of electrons from NADPH to oxygen during
phagocytosis forming superoxide and reactive oxygen
species. p47phox is required for activation of NADH
oxidase and plays a role in translocation. It contains
an N-terminal Phox homology (PX) domain, tandem SH3
domains (N-SH3 and C-SH3), a polybasic/autoinhibitory
region, and a C-terminal proline-rich region (PRR). This
model characterizes the second SH3 domain (or C-SH3) of
p47phox. In its inactive state, the tandem SH3 domains
interact intramolecularly with the autoinhibitory
region; upon activation, the tandem SH3 domains are
exposed through a conformational change, resulting in
their binding to the PRR of p22phox and the activation
of NADPH oxidase. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 30.6 bits (69), Expect = 0.073
Identities = 18/44 (40%), Positives = 25/44 (56%), Gaps = 4/44 (9%)
Query: 137 VAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQ 180
+ I YT + + DELT +G+ V ++L DGW WV R GE
Sbjct: 3 ITIKAYTAVEE-DELTLLEGEAIEVIHKLLDGW-WVV--RKGEV 42
>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 = 0.094
Identities = 11/24 (45%), Positives = 16/24 (66%)
Query: 147 DTDELTFQKGDIFFVHNELGDGWL 170
D+ +L+F+KGDI V + D WL
Sbjct: 12 DSGQLSFRKGDILRVIARVDDDWL 35
>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 = 30.3 bits (69), Expect = 0.098
Identities = 13/45 (28%), Positives = 22/45 (48%), Gaps = 3/45 (6%)
Query: 137 VAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 181
VAI Y DE++ Q+G++ V + GW +V ++G
Sbjct: 3 VAIADYEAQ-GDDEISLQEGEVVEVLEKNDSGWWYVRKG--DKEG 44
>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 = 30.4 bits (69), Expect = 0.098
Identities = 11/36 (30%), Positives = 16/36 (44%), Gaps = 1/36 (2%)
Query: 137 VAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWV 172
VAI + D +L+F+ GD V + W W
Sbjct: 3 VAIADFVAT-DDSQLSFESGDKLLVLRKPSVDWWWA 37
>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 = 30.3 bits (68), Expect = 0.10
Identities = 18/46 (39%), Positives = 25/46 (54%), Gaps = 6/46 (13%)
Query: 142 YTKMPDT-DELTFQKGDIFFV--HNELG-DGWLWVTAHRTGEQGMI 183
Y +P+ +EL F+KGDI V N G +GW + H G QG+
Sbjct: 6 YDNVPECAEELAFRKGDILTVIEQNTGGLEGWWLCSLH--GRQGIA 49
>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 = 30.9 bits (70), Expect = 0.15
Identities = 15/59 (25%), Positives = 30/59 (50%), Gaps = 2/59 (3%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEK--KAVRYLMGGRTFECLDAVINRYRKEQ 57
+FL+R S++ DYSL + ++ +RI + + ++ TF L ++ Y K+
Sbjct: 28 AFLIRDSESRHNDYSLSVRDGDTVKHYRIRQLDEGGFFIARRTTFRTLQELVEHYSKDS 86
>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 = 29.7 bits (67), Expect = 0.15
Identities = 11/35 (31%), Positives = 20/35 (57%), Gaps = 2/35 (5%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
EL+F+KGD ++ ++ D W W G+ G++
Sbjct: 14 RELSFKKGDSLTLYRQVSDDW-WRGQL-NGQDGLV 46
>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 = 29.8 bits (67), Expect = 0.16
Identities = 15/45 (33%), Positives = 21/45 (46%), Gaps = 4/45 (8%)
Query: 137 VAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 181
A+ + K +EL+FQ GD F + GD W TA + G
Sbjct: 3 KALWDF-KARGDEELSFQAGDQFRIAERSGDWW---TALKLDRAG 43
>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 = 29.6 bits (67), Expect = 0.17
Identities = 14/46 (30%), Positives = 25/46 (54%), Gaps = 3/46 (6%)
Query: 138 AILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
A+ Y DEL+F++GD+ ++ ++ W W A G+ G+I
Sbjct: 4 ALYDYEAQHP-DELSFEEGDLLYISDKSDPNW-W-KATCGGKTGLI 46
>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 = 29.8 bits (67), Expect = 0.18
Identities = 16/47 (34%), Positives = 25/47 (53%), Gaps = 3/47 (6%)
Query: 137 VAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
VA YT EL+F++GD+ +H++ W W H G +G+I
Sbjct: 5 VACFDYTGRTAQ-ELSFKRGDVLLLHSKASSDW-WRGEH-NGMRGLI 48
>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 = 30.7 bits (69), Expect = 0.18
Identities = 14/37 (37%), Positives = 22/37 (59%), Gaps = 2/37 (5%)
Query: 89 GDFYIGGRQ-FDSLSDLISYYSSCSDLLKRERLAHPC 124
G FYI R F +L +L+ +Y +D L ++L+ PC
Sbjct: 67 GGFYISPRSTFSTLQELVDHYKKGNDGLC-QKLSVPC 102
Score = 26.5 bits (58), Expect = 5.2
Identities = 16/62 (25%), Positives = 28/62 (45%), Gaps = 7/62 (11%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGG-------RTFECLDAVINRY 53
SF++R S+ + G YSL + ++ +R L G TF L +++ Y
Sbjct: 28 SFMIRDSETTKGSYSLSVRDYDPQHGDTVKHYKIRTLDNGGFYISPRSTFSTLQELVDHY 87
Query: 54 RK 55
+K
Sbjct: 88 KK 89
>gnl|CDD|212814 cd11881, SH3_MYO7A, Src Homology 3 domain of Myosin VIIa and
similar proteins. Myo7A is an uncoventional myosin that
is involved in organelle transport. It is required for
sensory function in both Drosophila and mammals.
Mutations in the Myo7A gene cause both syndromic
deaf-blindness [Usher syndrome I (USH1)] and
nonsyndromic (DFNB2 and DFNA11) deafness in humans. It
contains an N-terminal motor domain, light chain-binding
IQ motifs, a coiled-coil region for heavy chain
dimerization, and a tail consisting of a pair of
MyTH4-FERM tandems separated by a 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 = 64
Score = 29.8 bits (67), Expect = 0.19
Identities = 17/54 (31%), Positives = 27/54 (50%), Gaps = 6/54 (11%)
Query: 134 KRIVAILPYTKMPD-TDELTFQKGDIFFVHNELGD-----GWLWVTAHRTGEQG 181
K +VA+ Y D + L+F KGD+ + + G+ GW RTG++G
Sbjct: 2 KYVVALQDYPNPSDGSSFLSFAKGDLIILDQDTGEQVMNSGWCNGRNDRTGQRG 55
>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 = 29.6 bits (67), Expect = 0.19
Identities = 12/41 (29%), Positives = 25/41 (60%), Gaps = 1/41 (2%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 189
+E++F +GDI ++ +GW W+ + G++G+ + VE
Sbjct: 14 NEISFVEGDIITQIEQIDEGW-WLGVNAKGQKGLFPANYVE 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 = 30.4 bits (69), Expect = 0.19
Identities = 20/69 (28%), Positives = 35/69 (50%), Gaps = 2/69 (2%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VRYLMGGRTFECLDAVINRYRKEQI 58
SFLVR S++SPG YS+ + ++ +RI + + Y+ F L +++ + K
Sbjct: 26 SFLVRESESSPGQYSISLRYDGRVYHYRISEDSDGKVYVTQEHRFNTLAELVHHHSKNAD 85
Query: 59 VEGHTLGFP 67
TL +P
Sbjct: 86 GLITTLRYP 94
>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 = 29.4 bits (66), Expect = 0.22
Identities = 16/54 (29%), Positives = 25/54 (46%), Gaps = 1/54 (1%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLV 188
VA+ Y+ +EL QKG+ V + +GWL + TG G+ + V
Sbjct: 1 MCVALHSYSAH-RPEELELQKGEGVRVLGKFQEGWLRGLSLVTGRVGIFPSNYV 53
>gnl|CDD|212849 cd11916, SH3_Sorbs1_3, Third (or C-terminal) Src Homology 3 domain
of Sorbin and SH3 domain containing 1 (Sorbs1), also
called ponsin. Sorbs1 is also called ponsin, SH3P12, or
CAP (c-Cbl associated protein). It is an adaptor protein
containing one sorbin homology (SoHo) and three SH3
domains. It binds Cbl and plays a major role in
regulating the insulin signaling pathway by enhancing
insulin-induced phosphorylation of Cbl. Sorbs1, like
vinexin, localizes at cell-ECM and cell-cell adhesion
sites where it binds vinculin, paxillin, and afadin. It
may function in the control of cell motility. Other
interaction partners of Sorbs1 include c-Abl, Sos,
flotillin, Grb4, ataxin-7, filamin C, among others. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 29.2 bits (65), Expect = 0.28
Identities = 17/44 (38%), Positives = 22/44 (50%), Gaps = 1/44 (2%)
Query: 138 AILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 181
A+ Y D DEL + GDI V + DGW T+ RT + G
Sbjct: 6 ALYSYAPQND-DELELRDGDIVDVMEKCDDGWFVGTSRRTKQFG 48
>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 = 29.1 bits (65), Expect = 0.29
Identities = 16/45 (35%), Positives = 21/45 (46%), Gaps = 6/45 (13%)
Query: 142 YTKMPDT-DELTFQKGDIFFV---HNELGDGWLWVTAHRTGEQGM 182
Y D DEL F++GDI V + +GW H G QG+
Sbjct: 7 YDNKADCSDELAFRRGDILTVLEQNVPGSEGWWKCLLH--GRQGL 49
>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 = 28.8 bits (64), Expect = 0.31
Identities = 12/29 (41%), Positives = 17/29 (58%)
Query: 150 ELTFQKGDIFFVHNELGDGWLWVTAHRTG 178
+LTFQ+GD+ V + GD W +TG
Sbjct: 15 DLTFQQGDVILVTKKDGDWWTGTVGDKTG 43
>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 = 30.8 bits (70), Expect = 0.32
Identities = 15/34 (44%), Positives = 19/34 (55%)
Query: 2 FLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVR 35
FLVR S +SPGDY L Q F+I + +R
Sbjct: 28 FLVRDSLSSPGDYVLTCRWKGQPLHFKINRVVLR 61
>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 = 28.8 bits (65), Expect = 0.34
Identities = 7/21 (33%), Positives = 13/21 (61%)
Query: 150 ELTFQKGDIFFVHNELGDGWL 170
EL+ +KGDI ++ ++ W
Sbjct: 15 ELSLKKGDIIYIRRQIDKNWY 35
>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 = 28.5 bits (64), Expect = 0.40
Identities = 9/31 (29%), Positives = 15/31 (48%), Gaps = 1/31 (3%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAH-RTG 178
+EL ++GD+ + L GW + R G
Sbjct: 14 EELDLREGDVVTITGILDKGWFRGELNGRRG 44
>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 = 29.2 bits (65), Expect = 0.40
Identities = 17/38 (44%), Positives = 23/38 (60%), Gaps = 5/38 (13%)
Query: 149 DELTFQKGDIFFV--HNELG-DGWLWVTAHRTGEQGMI 183
DEL+F+KGDI V + G DGW + H G QG++
Sbjct: 17 DELSFRKGDIMTVLERDTQGLDGWWLCSLH--GRQGIV 52
>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 = 28.6 bits (64), Expect = 0.45
Identities = 18/47 (38%), Positives = 25/47 (53%), Gaps = 2/47 (4%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 181
+VA+ YT +DELT +GDI V + D W W + G+QG
Sbjct: 1 TVVALYDYTA-NRSDELTIHRGDIIRVLYKDNDNW-WFGSLVNGQQG 45
>gnl|CDD|212846 cd11913, SH3_BAIAP2L1, Src Homology 3 domain of Brain-specific
Angiogenesis Inhibitor 1-Associated Protein 2-Like 1,
also called Insulin Receptor Tyrosine Kinase Substrate
(IRTKS). BAIAP2L1 or IRTKS is widely expressed, serves
as a substrate for the insulin receptor, and binds the
small GTPase Rac. It plays a role in regulating the
actin cytoskeleton and colocalizes with F-actin,
cortactin, VASP, and vinculin. BAIAP2L1 expression leads
to the formation of short actin bundles, distinct from
filopodia-like protrusions induced by the expression of
the related protein IRSp53. IRTKS mediates the
recruitment of effector proteins Tir and EspFu, which
regulate host cell actin reorganization, to bacterial
attachment sites. It contains an N-terminal IMD or
Inverse-Bin/Amphiphysin/Rvs (I-BAR) domain, an SH3
domain, and a WASP homology 2 (WH2) actin-binding motif
at the C-terminus. The SH3 domain of IRTKS has been
shown to bind the proline-rich C-terminus of EspFu. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 28.7 bits (64), Expect = 0.46
Identities = 15/49 (30%), Positives = 25/49 (51%), Gaps = 1/49 (2%)
Query: 134 KRIVAILPYTKMPDTDELTFQKGD-IFFVHNELGDGWLWVTAHRTGEQG 181
+++ I P+T + L+F +GD I + E DGWL+ T +G
Sbjct: 1 QKVKTIFPHTAGNNKTLLSFAQGDVITLLIPEEKDGWLYGEHDTTKARG 49
>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 = 28.4 bits (63), Expect = 0.48
Identities = 17/57 (29%), Positives = 31/57 (54%), Gaps = 2/57 (3%)
Query: 136 IVAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVEDLD 192
+VA+ PY + D+L+F+KG+ V E G+ W + T ++G I + V ++
Sbjct: 2 VVALYPYDGI-HEDDLSFKKGEKLKVIEEHGE-WWKARSLTTKKEGFIPSNYVAKVN 56
>gnl|CDD|212850 cd11917, SH3_Sorbs2_3, Third (or C-terminal) Src Homology 3 domain
of Sorbin and SH3 domain containing 2 (Sorbs2), also
called Arg-binding protein 2 (ArgBP2). Sorbs2 or ArgBP2
is an adaptor protein containing one sorbin homology
(SoHo) and three SH3 domains. It regulates
actin-dependent processes including cell adhesion,
morphology, and migration. It is expressed in many
tissues and is abundant in the heart. Like vinexin, it
is found in focal adhesion where it interacts with
vinculin and afadin. It also localizes in epithelial
cell stress fibers and in cardiac muscle cell Z-discs.
Sorbs2 has been implicated to play roles in the
signaling of c-Arg, Akt, and Pyk2. Other interaction
partners of Sorbs2 include c-Abl, flotillin, spectrin,
dynamin 1/2, synaptojanin, PTP-PEST, among others. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 61
Score = 28.4 bits (63), Expect = 0.50
Identities = 15/37 (40%), Positives = 21/37 (56%), Gaps = 1/37 (2%)
Query: 142 YTKMP-DTDELTFQKGDIFFVHNELGDGWLWVTAHRT 177
Y MP + DEL ++GD+ V + DGW T+ RT
Sbjct: 11 YNYMPRNEDELELREGDVIDVMEKCDDGWFVGTSRRT 47
>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 = 29.5 bits (66), Expect = 0.55
Identities = 15/36 (41%), Positives = 21/36 (58%), Gaps = 2/36 (5%)
Query: 89 GDFYIGGR-QFDSLSDLISYYSSCSDLLKRERLAHP 123
G FYI R F L +L+ +Y++ SD L RL+ P
Sbjct: 67 GGFYISPRITFPGLHELVRHYTNASDGLC-TRLSRP 101
>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 = 29.6 bits (67), Expect = 0.55
Identities = 21/84 (25%), Positives = 34/84 (40%), Gaps = 18/84 (21%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGR-------TFECLDAVINRY 53
+FLVR + GDY+L + +I + G+ TF + +IN Y
Sbjct: 30 TFLVRDASTMKGDYTLTLRKGGNNKLIKI------FHRDGKYGFSDPLTFNSVVELINYY 83
Query: 54 RKEQIVEGHT-----LGFPVTRIN 72
R + E + L +PV+R
Sbjct: 84 RNNSLAEYNRKLDVKLLYPVSRFQ 107
Score = 26.5 bits (59), Expect = 6.3
Identities = 7/16 (43%), Positives = 12/16 (75%)
Query: 97 QFDSLSDLISYYSSCS 112
F+S+ +LI+YY + S
Sbjct: 72 TFNSVVELINYYRNNS 87
>gnl|CDD|140213 PTZ00186, PTZ00186, heat shock 70 kDa precursor protein;
Provisional.
Length = 657
Score = 30.8 bits (69), Expect = 0.57
Identities = 18/48 (37%), Positives = 26/48 (54%), Gaps = 3/48 (6%)
Query: 77 IPSAIFRVTAVCGDFYIGGRQFD-SLSDLI--SYYSSCSDLLKRERLA 121
I +F V A GD ++GG FD +LSD I + + L +ER+A
Sbjct: 231 IAGGVFEVKATNGDTHLGGEDFDLALSDYILEEFRKTSGIDLSKERMA 278
>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 = 28.0 bits (63), Expect = 0.59
Identities = 10/21 (47%), Positives = 14/21 (66%), Gaps = 1/21 (4%)
Query: 151 LTFQKGDIFFVHNELGDGWLW 171
L+F+ GDI +V N+ GW W
Sbjct: 16 LSFKAGDIIYVLNKDPSGW-W 35
>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 = 29.2 bits (65), Expect = 0.59
Identities = 15/28 (53%), Positives = 19/28 (67%), Gaps = 1/28 (3%)
Query: 89 GDFYIGGR-QFDSLSDLISYYSSCSDLL 115
G FYI R QF+SL L++YYS +D L
Sbjct: 67 GGFYITSRTQFNSLQQLVAYYSKHADGL 94
>gnl|CDD|236590 PRK09613, thiH, thiamine biosynthesis protein ThiH; Reviewed.
Length = 469
Score = 30.9 bits (71), Expect = 0.60
Identities = 13/26 (50%), Positives = 16/26 (61%), Gaps = 6/26 (23%)
Query: 126 PPEPVNDK--KRIVAIL----PYTKM 145
P V+D+ K+IVAIL PYT M
Sbjct: 288 FPYLVSDEDFKKIVAILRLAVPYTGM 313
>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 = 28.2 bits (63), Expect = 0.62
Identities = 12/36 (33%), Positives = 19/36 (52%), Gaps = 2/36 (5%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFF-VHNELGDGW 169
+ A+ Y ++DEL+F+ GDI + E GW
Sbjct: 1 PVRALYDYEGQ-ESDELSFKAGDILTKLEEEDEQGW 35
>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 = 28.1 bits (62), Expect = 0.64
Identities = 14/45 (31%), Positives = 23/45 (51%)
Query: 148 TDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVEDLD 192
T++L+F+KG+ F + N W + TG+ G I + V D
Sbjct: 14 TEDLSFKKGERFQIINNTEGDWWEARSIATGKNGYIPSNYVAPAD 58
>gnl|CDD|212793 cd11859, SH3_ZO, Src homology 3 domain of the Tight junction
proteins, Zonula occludens (ZO) proteins. ZO proteins
are scaffolding proteins that associate with each other
and with other proteins of the tight junction, zonula
adherens, and gap junctions. They play roles in
regulating cytoskeletal dynamics at these cell
junctions. They are considered members of the MAGUK
(membrane-associated guanylate kinase) protein family,
which is characterized by the presence of a core of
three domains: PDZ, SH3, and guanylate kinase (GuK). The
GuK domain in MAGUK proteins is enzymatically inactive;
instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. Vertebrates contain three ZO proteins (ZO-1,
ZO-2, and ZO-3) with redundant and non-redundant roles.
They contain three PDZ domains, followed by SH3 and GuK
domains; in addition, ZO-1 and ZO-2 contains a
proline-rich (PR) actin binding domain at the C-terminus
while ZO-3 contains this PR domain between the second
and third PDZ domains. The C-terminal regions of the
three ZO proteins are unique. The SH3 domain of ZO-1 has
been shown to bind ZONAB, ZAK, afadin, and Galpha12. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 62
Score = 28.4 bits (64), Expect = 0.66
Identities = 16/45 (35%), Positives = 24/45 (53%), Gaps = 7/45 (15%)
Query: 146 PDTDELTFQKGDIFFVHNELGDG----WLWV---TAHRTGEQGMI 183
P EL+F+KG++F V + L G W V H+ E+G+I
Sbjct: 11 PAKGELSFKKGEVFHVVDTLYQGTVGSWQAVRVGRNHQELERGVI 55
>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 = 29.1 bits (65), Expect = 0.69
Identities = 15/57 (26%), Positives = 30/57 (52%), Gaps = 2/57 (3%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEK--KAVRYLMGGRTFECLDAVINRYRK 55
+FL+R S++ G++SL ++ +RI + + +L +TF L+ +N Y
Sbjct: 28 AFLIRESESQKGEFSLSVLDGGVVKHYRIRRLDEGGFFLTRRKTFSTLNEFVNYYTT 84
>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 = 28.0 bits (63), Expect = 0.69
Identities = 11/35 (31%), Positives = 19/35 (54%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
++L F+KGDI + D + ++ G +GMI
Sbjct: 16 EDLPFKKGDILTIVAVTKDPNWYKAKNKDGREGMI 50
>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 = 28.5 bits (64), Expect = 0.98
Identities = 8/29 (27%), Positives = 17/29 (58%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRI 29
S+L+R S G Y+L N +++ +++
Sbjct: 29 SYLIRESSRDDGYYTLSLRFNGKVKNYKL 57
>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 = 28.8 bits (64), Expect = 1.0
Identities = 18/73 (24%), Positives = 35/73 (47%), Gaps = 6/73 (8%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRI-EKKAVRYLMGGRTFECLDAVINRYRKEQIV 59
++LVR G+Y++ NN+++ +I + ++ R F+ L ++ Y+ +
Sbjct: 28 TYLVRHRTKESGEYAISIKYNNEVKHIKILTRDGFFHIAENRKFKSLMELVEYYKHHSLK 87
Query: 60 EGH-----TLGFP 67
EG TL FP
Sbjct: 88 EGFRSLDTTLQFP 100
>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 = 28.7 bits (64), Expect = 1.1
Identities = 14/33 (42%), Positives = 19/33 (57%), Gaps = 1/33 (3%)
Query: 95 GRQFDSLSDLISYYSSCSDLLKRERLAHPCPPP 127
G++FD+L L+ +YS D L R L PCP
Sbjct: 68 GKKFDTLWQLVEHYSYKPDGLLRV-LTEPCPRI 99
>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 = 28.3 bits (64), Expect = 1.1
Identities = 10/18 (55%), Positives = 15/18 (83%)
Query: 91 FYIGGRQFDSLSDLISYY 108
+YI G+ F S+S+LI+YY
Sbjct: 66 YYIEGKSFKSISELINYY 83
>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 = 27.5 bits (61), Expect = 1.1
Identities = 12/38 (31%), Positives = 21/38 (55%), Gaps = 5/38 (13%)
Query: 149 DELTFQKGDIFFV---HNELGDGWLWVTAHRTGEQGMI 183
+EL+F++GD+ V + GW + H G+QG+
Sbjct: 15 EELSFRRGDVLMVLKREHGSLPGWWLCSLH--GQQGIA 50
>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 = 27.4 bits (61), Expect = 1.2
Identities = 11/38 (28%), Positives = 24/38 (63%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRD 186
DEL+F++GD+ ++ ++ D + W G+ G++ +D
Sbjct: 14 DELSFKRGDLIYIISKEYDSFGWWVGELNGKVGLVPKD 51
>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 = 27.3 bits (60), Expect = 1.3
Identities = 15/34 (44%), Positives = 18/34 (52%), Gaps = 3/34 (8%)
Query: 147 DTDELTFQKGDIFFVHNELGDGWLWVTAH--RTG 178
+ DEL+F KGD+ V GW W H RTG
Sbjct: 12 NEDELSFSKGDVIHVTRVEEGGW-WEGTHNGRTG 44
>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 = 27.4 bits (60), Expect = 1.3
Identities = 19/48 (39%), Positives = 28/48 (58%), Gaps = 3/48 (6%)
Query: 137 VAILPYTKMPDTDELTFQKGD-IFFVHNELGDGWLWVTAHRTGEQGMI 183
VA+ Y +TD L+F+KG+ + V+N GD WL + TG+ G I
Sbjct: 3 VALYDYESRTETD-LSFKKGERLQIVNNTEGDWWL-AHSLTTGQTGYI 48
>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 = 27.1 bits (60), Expect = 1.3
Identities = 14/41 (34%), Positives = 24/41 (58%), Gaps = 3/41 (7%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 189
DEL+F+KGD+ + L +W A GE+G + ++ V+
Sbjct: 14 DELSFKKGDVLKI---LSSDDIWFKAELNGEEGYVPKNFVD 51
>gnl|CDD|178693 PLN03148, PLN03148, Blue copper-like protein; Provisional.
Length = 167
Score = 29.1 bits (65), Expect = 1.5
Identities = 19/85 (22%), Positives = 26/85 (30%), Gaps = 11/85 (12%)
Query: 95 GRQFDSLSDLISYY-----SSCSDLLKRERLAHPCPPPEPVNDKKRIVAILPYTKMPDTD 149
G+ F L+ YY C + +K L HP PPP K
Sbjct: 86 GKDFIPLNKAKRYYFICGNGQCFNGMKVTILVHPLPPPPSHTAAANG------AKSHSAA 139
Query: 150 ELTFQKGDIFFVHNELGDGWLWVTA 174
F KG + L +W +
Sbjct: 140 PAAFHKGLVALRGLVLWMASIWFGS 164
>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 = 26.9 bits (60), Expect = 1.6
Identities = 13/37 (35%), Positives = 21/37 (56%), Gaps = 1/37 (2%)
Query: 147 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
D ++L F+KG+I V + + W W + G+ GMI
Sbjct: 13 DDEDLPFKKGEILTVIRKPEEQW-WNARNSEGKTGMI 48
>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 = 26.9 bits (60), Expect = 1.6
Identities = 14/35 (40%), Positives = 16/35 (45%), Gaps = 6/35 (17%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWV-----TAHRTG 178
DELTF +G+I V E D W W R G
Sbjct: 14 DELTFSEGEIIVVTGEEDDEW-WEGHIEGDPSRRG 47
>gnl|CDD|218325 pfam04913, Baculo_Y142, Baculovirus Y142 protein.
Length = 454
Score = 29.6 bits (67), Expect = 1.7
Identities = 13/46 (28%), Positives = 20/46 (43%), Gaps = 2/46 (4%)
Query: 50 INRYRKEQIVEGHTLGFPVTRINLG--IFIPSAIFRVTAVCGDFYI 93
+++YRK I FP R N IF+ I ++ FY+
Sbjct: 309 VDKYRKLLIKIEDNTIFPSLRANEPSYIFVRPDIIQIKGTLNAFYV 354
>gnl|CDD|212872 cd11939, SH3_ephexin1, Src homology 3 domain of the Rho guanine
nucleotide exchange factor, ephexin-1 (also called NGEF
or ARHGEF27). Ephexin-1, also called NGEF (neuronal
GEF) or ARHGEF27, activates RhoA, Tac1, and Cdc42 by
exchanging bound GDP for free GTP. It is expressed
mainly in the brain in a region associated with movement
control. It regulates the stability of postsynaptic
acetylcholine receptor (AChR) clusters and thus, plays a
critical role in the maturation and neurotransmission of
neuromuscular junctions. Ephexin-1 directly interacts
with the ephrin receptor EphA4 and their coexpression
enhances the ability of ephexin-1 to activate RhoA. It
is required for normal axon growth and EphA-induced
growth cone collapse. Ephexin-1 contains RhoGEF (also
called Dbl-homologous or DH), Pleckstrin Homology (PH),
and SH3 domains. The SH3 domains of ARHGEFs play an
autoinhibitory role through intramolecular interactions
with a proline-rich region N-terminal to the DH domain.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 26.8 bits (59), Expect = 1.8
Identities = 13/56 (23%), Positives = 28/56 (50%), Gaps = 1/56 (1%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVED 190
++ + PY + DEL+ + D+ + ++ DGW++ E+G +VE+
Sbjct: 1 QVQCVHPYVSQ-EPDELSLELADVLNILDKTDDGWIFGERLHDQERGWFPSSVVEE 55
>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 = 26.9 bits (60), Expect = 1.8
Identities = 14/58 (24%), Positives = 27/58 (46%), Gaps = 4/58 (6%)
Query: 135 RIVAILPYTKMPDTDELTFQKGDIFFVHNELGDGWL---WVTAHRTGEQGMIFRDLVE 189
++ A+ PY D+L F G + V E W +V ++ ++G+ ++ VE
Sbjct: 3 KVKALYPYES-DHEDDLNFDVGQLITVTEEEDADWYFGEYVDSNGNTKEGIFPKNFVE 59
>gnl|CDD|224104 COG1183, PssA, Phosphatidylserine synthase [Lipid metabolism].
Length = 234
Score = 28.8 bits (65), Expect = 1.8
Identities = 11/39 (28%), Positives = 17/39 (43%), Gaps = 6/39 (15%)
Query: 75 IFIPSAIF------RVTAVCGDFYIGGRQFDSLSDLISY 107
+ I A+ RV G + DSL+DL+S+
Sbjct: 40 LLILLALILDGLDGRVARKLNAKSAFGAELDSLADLVSF 78
>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 = 26.6 bits (59), Expect = 1.9
Identities = 15/35 (42%), Positives = 21/35 (60%), Gaps = 1/35 (2%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
DEL+F+KG I V N + D W A G++G+I
Sbjct: 14 DELSFKKGSILKVLN-MEDDPNWYKAELDGKEGLI 47
>gnl|CDD|212729 cd11795, SH3_DNMBP_N2, Second N-terminal Src homology 3 domain of
Dynamin Binding Protein, also called Tuba. DNMBP or
Tuba is a cdc42-specific guanine nucleotide exchange
factor (GEF) that contains four N-terminal SH3 domains,
a central RhoGEF [or Dbl homology (DH)] domain followed
by a Bin/Amphiphysin/Rvs (BAR) domain, and two
C-terminal SH3 domains. It provides a functional link
between dynamin and key regulatory proteins of the actin
cytoskeleton. It plays an important role in regulating
cell junction configuration. The four N-terminal SH3
domains of DNMBP binds the GTPase dynamin, which plays
an important role in the fission of endocytic vesicles.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 26.6 bits (59), Expect = 1.9
Identities = 9/35 (25%), Positives = 14/35 (40%), Gaps = 1/35 (2%)
Query: 147 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 181
+ L Q+GD+ + GWL + G G
Sbjct: 12 EPGHLNLQRGDLVELTGTTDSGWLQGRS-CWGSSG 45
>gnl|CDD|212851 cd11918, SH3_Vinexin_3, Third (or C-terminal) Src Homology 3 domain
of Vinexin, also called Sorbin and SH3 domain containing
3 (Sorbs3). Vinexin is also called Sorbs3, SH3P3, and
SH3-containing adapter molecule 1 (SCAM-1). It is an
adaptor protein containing one sorbin homology (SoHo)
and three SH3 domains. Vinexin was first identified as a
vinculin binding protein; it is co-localized with
vinculin at cell-ECM and cell-cell adhesion sites. There
are several splice variants of vinexin: alpha, which
contains the SoHo and three SH3 domains and displays
tissue-specific expression; and beta, which contains
only the three SH3 domains and is widely expressed.
Vinexin alpha stimulates the accumulation of F-actin at
focal contact sites. Vinexin also promotes keratinocyte
migration and wound healing. The SH3 domains of vinexin
have been reported to bind a number of ligands including
vinculin, WAVE2, DLG5, Abl, and Cbl. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 26.8 bits (59), Expect = 2.1
Identities = 12/33 (36%), Positives = 17/33 (51%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 181
DEL ++GD V + DGW + RT + G
Sbjct: 16 DELELREGDRVDVMQQCDDGWFVGVSRRTQKFG 48
>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 = 26.5 bits (58), Expect = 2.2
Identities = 13/40 (32%), Positives = 20/40 (50%), Gaps = 2/40 (5%)
Query: 150 ELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 189
EL QKGDI +++ ++ W H G G+ R +E
Sbjct: 16 ELPLQKGDIVYIYKQIDQNWYEGEHH--GRVGIFPRSYIE 53
>gnl|CDD|227226 COG4889, COG4889, Predicted helicase [General function prediction
only].
Length = 1518
Score = 29.4 bits (66), Expect = 2.3
Identities = 13/35 (37%), Positives = 21/35 (60%), Gaps = 2/35 (5%)
Query: 21 NNQIQRFRIEKKAVRYLMGGRTFECLDAVINRYRK 55
N+ I I +KA Y++ GR+ +D VI+RY+
Sbjct: 1444 NSSITITGIPEKAFDYVVNGRS--AIDWVIDRYQV 1476
>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 = 26.5 bits (59), Expect = 2.3
Identities = 12/40 (30%), Positives = 21/40 (52%), Gaps = 2/40 (5%)
Query: 150 ELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 189
EL F++GDI + N++ + W + G+ G + VE
Sbjct: 16 ELGFKEGDIITLTNQIDENWYEGMVN--GQSGFFPVNYVE 53
>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 = 27.6 bits (61), Expect = 2.6
Identities = 18/63 (28%), Positives = 28/63 (44%), Gaps = 7/63 (11%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGR-------TFECLDAVINRY 53
+FL+R S+ G YSL + I+ +R L G TF C+ +I Y
Sbjct: 28 AFLIRESETLKGSYSLSVRDYDPQHGDVIKHYKIRSLDNGGYYISPRITFPCISDMIKHY 87
Query: 54 RKE 56
+K+
Sbjct: 88 QKQ 90
>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 = 26.1 bits (58), Expect = 2.7
Identities = 11/32 (34%), Positives = 16/32 (50%), Gaps = 1/32 (3%)
Query: 138 AILPYTKMPDTDELTFQKGDIFFVHNELGDGW 169
+ YT + DEL + GD V E+ +GW
Sbjct: 4 VLFSYTPQNE-DELELKVGDTIEVLGEVEEGW 34
>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 = 26.4 bits (58), Expect = 2.9
Identities = 11/34 (32%), Positives = 18/34 (52%), Gaps = 2/34 (5%)
Query: 150 ELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
EL+F+KG +++ D W W H G G++
Sbjct: 15 ELSFKKGASLLLYHRASDDW-WEGRHN-GIDGLV 46
>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 = 26.3 bits (58), Expect = 2.9
Identities = 11/35 (31%), Positives = 20/35 (57%), Gaps = 1/35 (2%)
Query: 138 AILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWV 172
A+ Y K + +EL+F +GD V+++ W+ V
Sbjct: 4 ALYDYDKQTE-EELSFNEGDTLDVYDDSDSDWILV 37
>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 = 26.2 bits (57), Expect = 2.9
Identities = 13/35 (37%), Positives = 18/35 (51%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
D+L+F KG+ F + N W + TGE G I
Sbjct: 15 DDLSFHKGEKFQILNSSEGDWWEARSLTTGETGYI 49
>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 = 26.1 bits (57), Expect = 3.0
Identities = 14/42 (33%), Positives = 21/42 (50%), Gaps = 1/42 (2%)
Query: 137 VAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTG 178
+A+ PY+ D LTF +G+ V + G+ W RTG
Sbjct: 3 IALYPYSSSEPGD-LTFNEGEEILVTQKDGEWWTGSIEDRTG 43
>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 = 26.1 bits (57), Expect = 3.1
Identities = 14/35 (40%), Positives = 18/35 (51%), Gaps = 2/35 (5%)
Query: 147 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 181
+ DELTF +G+I V E W W+ H GE
Sbjct: 12 NPDELTFSEGEIIIVDGEEDKEW-WI-GHIDGEPT 44
>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 = 26.2 bits (58), Expect = 3.2
Identities = 15/42 (35%), Positives = 20/42 (47%), Gaps = 1/42 (2%)
Query: 137 VAILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTG 178
+A+ PY D LTF GD+ V + G+ W RTG
Sbjct: 3 IALYPYESNEPGD-LTFNAGDVILVTKKDGEWWTGTIGDRTG 43
>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 = 26.5 bits (59), Expect = 3.3
Identities = 10/22 (45%), Positives = 16/22 (72%)
Query: 147 DTDELTFQKGDIFFVHNELGDG 168
+ DEL+F+K DI +V N + +G
Sbjct: 12 NEDELSFKKDDILYVDNTMFNG 33
>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 = 26.2 bits (58), Expect = 3.3
Identities = 11/34 (32%), Positives = 18/34 (52%), Gaps = 3/34 (8%)
Query: 138 AILPYTKMPDTDELTFQKGDIFFVHN-ELGD-GW 169
+ Y + DELT ++GDI + + + D GW
Sbjct: 4 VLFDYEAENE-DELTLREGDIVTILSKDCEDKGW 36
>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 = 26.1 bits (58), Expect = 3.4
Identities = 16/37 (43%), Positives = 19/37 (51%), Gaps = 3/37 (8%)
Query: 149 DELTFQKGDIFFV---HNELGDGWLWVTAHRTGEQGM 182
DELT + GD + E GDGW RTGE G+
Sbjct: 14 DELTLKPGDKIELIEDDEEFGDGWYLGRNLRTGETGL 50
>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 = 26.1 bits (57), Expect = 3.4
Identities = 7/20 (35%), Positives = 12/20 (60%)
Query: 150 ELTFQKGDIFFVHNELGDGW 169
+L F KGD+ + +L + W
Sbjct: 16 DLKFNKGDVILLRRQLDENW 35
>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 = 27.3 bits (61), Expect = 3.4
Identities = 19/74 (25%), Positives = 34/74 (45%), Gaps = 7/74 (9%)
Query: 2 FLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VRYLMGGRTFECLDAVINRYRKEQIV 59
+LVR Y+L N ++ +IE+++ + YL R F+ L ++N Y + +
Sbjct: 29 YLVRVRPQGETQYALSIKYNGDVKHMKIEQRSDGLYYLSESRHFKSLVELVNYYERNSLG 88
Query: 60 EG-----HTLGFPV 68
E TL +P
Sbjct: 89 ENFAGLDTTLKWPY 102
>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 = 26.9 bits (60), Expect = 3.5
Identities = 9/15 (60%), Positives = 10/15 (66%)
Query: 2 FLVRPSDNSPGDYSL 16
FLVR S +PG Y L
Sbjct: 29 FLVRESTTTPGQYVL 43
>gnl|CDD|223371 COG0294, FolP, Dihydropteroate synthase and related enzymes
[Coenzyme metabolism].
Length = 274
Score = 28.0 bits (63), Expect = 3.6
Identities = 25/116 (21%), Positives = 37/116 (31%), Gaps = 25/116 (21%)
Query: 93 IGGRQFDSLSDLISYYSSCSDLLKRERLAHPCPPPEPVNDKKRIVAILPYTKMPDTDELT 152
IGG ++ +S + ER+ P E V + VAI T + L
Sbjct: 50 IGGESTRPGAEFVS------VEEELERV---DPVLEAVRSPESDVAISVDTSRAEVAPLA 100
Query: 153 FQKG---------------DIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVEDLDE 193
G + V ELG L + + + M DLV +D
Sbjct: 101 LGAGADEINDVDGGGIDPALLAAVAAELGAPIL-LMHEQGVPETMSINDLVAAVDM 155
>gnl|CDD|240227 PTZ00009, PTZ00009, heat shock 70 kDa protein; Provisional.
Length = 653
Score = 28.2 bits (63), Expect = 3.8
Identities = 15/41 (36%), Positives = 20/41 (48%), Gaps = 5/41 (12%)
Query: 77 IPSAIFRVTAVCGDFYIGGRQFDSLSDLISYYSSCSDLLKR 117
I IF V A GD ++GG FD+ L+ + C KR
Sbjct: 213 IEDGIFEVKATAGDTHLGGEDFDNR--LVEF---CVQDFKR 248
>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 = 25.9 bits (57), Expect = 3.8
Identities = 14/42 (33%), Positives = 23/42 (54%), Gaps = 2/42 (4%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVED 190
++L FQKGD+ V +++ + WL G+ G+ VED
Sbjct: 14 EDLEFQKGDVILVLSKVNEDWL--EGQCKGKIGIFPSAFVED 53
>gnl|CDD|218927 pfam06180, CbiK, Cobalt chelatase (CbiK). This family consists of
several bacterial cobalt chelatase (CbiK) proteins
(EC:4.99.1.-).
Length = 256
Score = 28.1 bits (63), Expect = 4.0
Identities = 20/71 (28%), Positives = 28/71 (39%), Gaps = 10/71 (14%)
Query: 5 RPSDNSPGDYSLFFH-INNQIQRFRIEKKAVRYLMG-GRTFE------CLDAVINRYRKE 56
RP + P DY + +QI R ++ V MG G CLD V+ Y
Sbjct: 109 RPLLDYPEDYEEVVEALKDQIPPLRKDEALV--FMGHGTDHHSNAVYACLDHVMRNYPFP 166
Query: 57 QIVEGHTLGFP 67
+ G G+P
Sbjct: 167 NVFVGTVEGYP 177
>gnl|CDD|232991 TIGR00473, pssA, CDP-diacylglycerol--serine
O-phosphatidyltransferase. This enzyme,
CDP-diacylglycerol--serine O-phosphatidyltransferase, is
involved in phospholipid biosynthesis catalyzing the
reaction CDP-diacylglycerol + L-serine = CMP +
L-1-phosphatidylserine. Members of this family do not
bear any significant sequence similarity to the
corresponding E.coli protein [Fatty acid and
phospholipid metabolism, Biosynthesis].
Length = 151
Score = 27.4 bits (61), Expect = 4.6
Identities = 9/47 (19%), Positives = 20/47 (42%), Gaps = 12/47 (25%)
Query: 73 LGIFIPSAIFRVTAVCGDFYIG------------GRQFDSLSDLISY 107
+ + + ++ DF G G++ DSL+D++S+
Sbjct: 17 RYTIVRACFLILLSMFFDFLDGRVARKTNRVSDFGKELDSLADVVSF 63
>gnl|CDD|212735 cd11801, SH3_JIP1_like, Src homology 3 domain of JNK-interacting
proteins 1 and 2, and similar domains. JNK-interacting
proteins (JIPs) function as scaffolding proteins for
c-Jun N-terminal kinase (JNK) signaling pathways. They
bind to components of Mitogen-activated protein kinase
(MAPK) pathways such as JNK, MKK, and several MAP3Ks
such as MLK and DLK. There are four JIPs (JIP1-4); all
contain a JNK binding domain. JIP1 and JIP2 also contain
SH3 and Phosphotyrosine-binding (PTB) domains. Both are
highly expressed in the brain and pancreatic beta-cells.
JIP1 functions as an adaptor linking motor to cargo
during axonal transport and also is involved in
regulating insulin secretion. JIP2 form complexes with
fibroblast growth factor homologous factors (FHFs),
which facilitates activation of the p38delta MAPK. The
SH3 domain of JIP1 homodimerizes at the interface
usually involved in proline-rich ligand recognition,
despite the lack of this motif in the domain itself. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 25.7 bits (57), Expect = 4.9
Identities = 15/36 (41%), Positives = 19/36 (52%), Gaps = 1/36 (2%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIF 184
DE+ GD +V E D W T RTG++G IF
Sbjct: 14 DEIELDIGDPVYVEQEADDLWCEGTNLRTGQRG-IF 48
>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 = 25.7 bits (57), Expect = 5.0
Identities = 12/34 (35%), Positives = 18/34 (52%), Gaps = 2/34 (5%)
Query: 149 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGM 182
DELT + GDI ++ +GW G++GM
Sbjct: 14 DELTLKVGDIITNVKKMEEGWW--EGTLNGKRGM 45
>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 = 25.4 bits (56), Expect = 5.3
Identities = 13/46 (28%), Positives = 23/46 (50%), Gaps = 2/46 (4%)
Query: 138 AILPYTKMPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 183
A+ + K + + L+F +G+ F + W VT H +GE G +
Sbjct: 4 ALYDF-KSAEPNTLSFSEGETFLLLERSNAHWWLVTNH-SGETGYV 47
>gnl|CDD|193121 pfam12643, MazG-like, MazG-like family. This family of short
proteins are distantly related to the MazG enzyme. This
suggests that these proteins are enzymes that catalyze
a related reaction.
Length = 98
Score = 26.4 bits (59), Expect = 5.7
Identities = 12/30 (40%), Positives = 14/30 (46%), Gaps = 3/30 (10%)
Query: 36 YLMGGR---TFECLDAVINRYRKEQIVEGH 62
YL+ R FE LD I K I+E H
Sbjct: 49 YLLARRLGIDFEELDEKIKEKLKLGILEEH 78
>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 = 26.5 bits (59), Expect = 5.8
Identities = 14/42 (33%), Positives = 20/42 (47%)
Query: 1 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRT 42
SFLVR S + +SL F + RIE+ + +G R
Sbjct: 33 SFLVRDSSDDRYIFSLSFRSQGSVHHTRIEQYQGTFSLGSRN 74
>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 = 26.4 bits (58), Expect = 6.5
Identities = 11/28 (39%), Positives = 18/28 (64%), Gaps = 1/28 (3%)
Query: 89 GDFYIGGR-QFDSLSDLISYYSSCSDLL 115
G +YI R QFD++ +L+ +Y +D L
Sbjct: 67 GGYYITTRAQFDTVQELVQHYMEVNDGL 94
>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 = 26.2 bits (58), Expect = 7.5
Identities = 19/64 (29%), Positives = 31/64 (48%), Gaps = 5/64 (7%)
Query: 2 FLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRTFECLD-AVINRYRKEQIVE 60
FLVR S ++PG + L +I+ ++I + G+ + LD V Y Q+VE
Sbjct: 31 FLVRESQSNPGAFVLSLKHGQKIKHYQI----IPIEDEGQWYFTLDDGVTKFYDLLQLVE 86
Query: 61 GHTL 64
+ L
Sbjct: 87 FYQL 90
>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 = 25.1 bits (55), Expect = 7.8
Identities = 8/22 (36%), Positives = 14/22 (63%)
Query: 149 DELTFQKGDIFFVHNELGDGWL 170
DEL+F +GD+ + +G+ W
Sbjct: 14 DELSFSEGDVITLKEYVGEEWA 35
>gnl|CDD|236310 PRK08601, PRK08601, NADH dehydrogenase subunit 5; Validated.
Length = 509
Score = 27.3 bits (61), Expect = 7.8
Identities = 13/32 (40%), Positives = 15/32 (46%), Gaps = 15/32 (46%)
Query: 24 IQRFRIEKKAVRYLMGGRTFECLDAVINRYRK 55
IQRF +VRYL+G R YRK
Sbjct: 88 IQRF-----SVRYLLGDR----------SYRK 104
>gnl|CDD|212675 cd10233, HSPA1-2_6-8-like_NBD, Nucleotide-binding domain of
HSPA1-A, -B, -L, HSPA-2, -6, -7, -8, and similar
proteins. This subfamily includes human HSPA1A (70-kDa
heat shock protein 1A, also known as HSP72; HSPA1;
HSP70I; HSPA1B; HSP70-1; HSP70-1A), HSPA1B (70-kDa heat
shock protein 1B, also known as HSPA1A; HSP70-2;
HSP70-1B), and HSPA1L (70-kDa heat shock protein 1-like,
also known as HSP70T; hum70t; HSP70-1L; HSP70-HOM). The
genes for these three HSPA1 proteins map in close
proximity on the major histocompatibility complex (MHC)
class III region on chromosome 6, 6p21.3. This subfamily
also includes human HSPA8 (heat shock 70kDa protein 8,
also known as LAP1; HSC54; HSC70; HSC71; HSP71; HSP73;
NIP71; HSPA10; the HSPA8 gene maps to 11q24.1), human
HSPA2 (70-kDa heat shock protein 2, also known as
HSP70-2; HSP70-3, the HSPA2 gene maps to 14q24.1), human
HSPA6 (also known as heat shock 70kDa protein 6
(HSP70B') gi 94717614, the HSPA6 gene maps to 1q23.3),
human HSPA7 (heat shock 70kDa protein 7 , also known as
HSP70B; the HSPA7 gene maps to 1q23.3) and Saccharmoyces
cerevisiae Stress-Seventy subfamily B/Ssb1p. This
subfamily belongs to the heat shock protein 70 (HSP70)
family of chaperones that assist in protein folding and
assembly and can direct incompetent "client" proteins
towards degradation. Typically, HSP70s have a
nucleotide-binding domain (NBD) and a substrate-binding
domain (SBD). The nucleotide sits in a deep cleft formed
between the two lobes of the NBD. The two subdomains of
each lobe change conformation between ATP-bound,
ADP-bound, and nucleotide-free states. ATP binding opens
up the substrate-binding site; substrate-binding
increases the rate of ATP hydrolysis. HSP70 chaperone
activity is regulated by various co-chaperones: J-domain
proteins and nucleotide exchange factors (NEFs).
Associations of polymorphisms within the MHC-III HSP70
gene locus with longevity, systemic lupus erythematosus,
Meniere's disease, noise-induced hearing loss,
high-altitude pulmonary edema, and coronary heart
disease, have been found. HSPA2 is involved in cancer
cell survival, is required for maturation of male
gametophytes, and is linked to male infertility. The
induction of HSPA6 is a biomarker of cellular stress.
HSPA8 participates in the folding and trafficking of
client proteins to different subcellular compartments,
and in the signal transduction and apoptosis process; it
has been shown to protect cardiomyocytes against
oxidative stress partly through an interaction with
alpha-enolase. S. cerevisiae Ssb1p, is part of the
ribosome-associated complex (RAC), it acts as a
chaperone for nascent polypeptides, and is important for
translation fidelity; Ssb1p is also a [PSI+]
prion-curing factor.
Length = 376
Score = 27.3 bits (61), Expect = 8.8
Identities = 11/24 (45%), Positives = 14/24 (58%)
Query: 77 IPSAIFRVTAVCGDFYIGGRQFDS 100
I IF V A GD ++GG FD+
Sbjct: 207 IEDGIFEVKATAGDTHLGGEDFDN 230
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
0.324 0.142 0.445
Gapped
Lambda K H
0.267 0.0813 0.140
Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 44354
Number of Hits to DB: 12,663,411
Number of extensions: 1228578
Number of successful extensions: 1329
Number of sequences better than 10.0: 1
Number of HSP's gapped: 1322
Number of HSP's successfully gapped: 179
Length of query: 235
Length of database: 10,937,602
Length adjustment: 94
Effective length of query: 141
Effective length of database: 6,768,326
Effective search space: 954333966
Effective search space used: 954333966
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 15 ( 7.0 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (22.0 bits)
S2: 57 (25.6 bits)