RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy13521
(366 letters)
>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 = 126 bits (319), Expect = 1e-36
Identities = 41/76 (53%), Positives = 54/76 (71%), Gaps = 2/76 (2%)
Query: 59 WFHPECTKNDAVDMLVK-AGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAV-RYL 116
WFH + ++ +A +MLVK GPGSFLVR SDN+PGDYSL F +N I+ F+I +++
Sbjct: 2 WFHGKISREEAYNMLVKVGGPGSFLVRESDNTPGDYSLSFRVNEGIKHFKIIPTGNNQFM 61
Query: 117 MGGRTFECLDAVINRY 132
MGGR F LD VI+RY
Sbjct: 62 MGGRYFSSLDDVIDRY 77
Score = 96.7 bits (241), Expect = 4e-25
Identities = 30/54 (55%), Positives = 38/54 (70%), Gaps = 1/54 (1%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAV-RYLMGGRTFECLDAVINRY 217
SFLVR SDN+PGDYSL F +N I+ F+I +++MGGR F LD VI+RY
Sbjct: 24 SFLVRESDNTPGDYSLSFRVNEGIKHFKIIPTGNNQFMMGGRYFSSLDDVIDRY 77
>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 = 94.0 bits (234), Expect = 2e-24
Identities = 37/47 (78%), Positives = 43/47 (91%)
Query: 1 MPDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVEDL 47
+PDTDEL+FQKGDIF VHNEL DGWLWVT+ RTGE G++FRDLVE+L
Sbjct: 13 VPDTDELSFQKGDIFVVHNELEDGWLWVTSLRTGESGLVFRDLVEEL 59
>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 = 88.1 bits (219), Expect = 8e-22
Identities = 28/83 (33%), Positives = 45/83 (54%), Gaps = 2/83 (2%)
Query: 58 DWFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VRY 115
W+H ++ +A +L G G FLVR S++SPGDY L + +++ +RI + Y
Sbjct: 2 PWYHGFISREEAEKLLKNEGDGDFLVRDSESSPGDYVLSVRVKGKVKHYRIRRNEDGKFY 61
Query: 116 LMGGRTFECLDAVINRYRKEQIV 138
L GGR F L ++ Y+K +
Sbjct: 62 LEGGRKFPSLVELVEHYQKNSLG 84
Score = 63.8 bits (156), Expect = 4e-13
Identities = 22/61 (36%), Positives = 34/61 (55%), Gaps = 2/61 (3%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VRYLMGGRTFECLDAVINRYRKEQI 222
FLVR S++SPGDY L + +++ +RI + YL GGR F L ++ Y+K +
Sbjct: 24 DFLVRDSESSPGDYVLSVRVKGKVKHYRIRRNEDGKFYLEGGRKFPSLVELVEHYQKNSL 83
Query: 223 V 223
Sbjct: 84 G 84
>gnl|CDD|213340 cd05391, RasGAP_p120GAP, Ras-GTPase Activating Domain of p120.
p120GAP is a negative regulator of Ras that stimulates
hydrolysis of bound GTP to GDP. Once the Ras regulator
p120GAP, a member of the GAP protein family, is
recruited to the membrane, it is transiently immobilized
to interact with Ras-GTP. The down-regulation of Ras by
p120GAP is a critical step in the regulation of many
cellular processes, which is disrupted in approximately
30% of human cancers. p120GAP contains SH2, SH3, PH,
calcium- and lipid-binding domains, suggesting its
involvement in a complex network of cellular
interactions in vivo.
Length = 328
Score = 78.7 bits (194), Expect = 2e-16
Identities = 29/55 (52%), Positives = 38/55 (69%)
Query: 261 HDLVMPSEEYSPLQQLLLESDLAVVKALADVCHGDRNRLASSLLRIFSLDVKETL 315
+ +MP EEYS L++L+L+ +L VV ALA VC DR LAS LLRIF + E+L
Sbjct: 1 MEKIMPEEEYSELKELILQKELHVVYALAHVCGQDRTLLASILLRIFRHEKLESL 55
>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 = 70.4 bits (173), Expect = 3e-15
Identities = 29/93 (31%), Positives = 49/93 (52%), Gaps = 3/93 (3%)
Query: 59 WFHPECTKNDAVDMLVKAGP--GSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYL 116
WFH T+ A +ML P G+FLVRPS+ P +++ F +I+ RI+++ ++
Sbjct: 6 WFHANLTREQAEEML-MRVPRDGAFLVRPSETDPNSFAISFRAEGKIKHCRIKQEGRLFV 64
Query: 117 MGGRTFECLDAVINRYRKEQIVEGHTLGFPVTR 149
+G FE L +++ Y K + L +PV
Sbjct: 65 IGTSQFESLVELVSYYEKHPLYRKIKLRYPVNE 97
Score = 51.5 bits (124), Expect = 2e-08
Identities = 20/70 (28%), Positives = 38/70 (54%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRTFECLDAVINRYRKEQIVE 224
+FLVRPS+ P +++ F +I+ RI+++ +++G FE L +++ Y K +
Sbjct: 28 AFLVRPSETDPNSFAISFRAEGKIKHCRIKQEGRLFVIGTSQFESLVELVSYYEKHPLYR 87
Query: 225 GHTLGFPVTR 234
L +PV
Sbjct: 88 KIKLRYPVNE 97
>gnl|CDD|215658 pfam00017, SH2, SH2 domain.
Length = 77
Score = 69.1 bits (170), Expect = 5e-15
Identities = 25/77 (32%), Positives = 45/77 (58%), Gaps = 3/77 (3%)
Query: 59 WFHPECTKNDAVDMLVKAGP-GSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VRY 115
W+H + ++ +A +L+ P G+FLVR S++ PGDY+L + +++ +RI+ Y
Sbjct: 1 WYHGKISREEAERLLLNPKPDGTFLVRESESKPGDYTLSVRDDGRVKHYRIQSLDNGGYY 60
Query: 116 LMGGRTFECLDAVINRY 132
+ GG TF L ++ Y
Sbjct: 61 ISGGVTFNSLPELVEHY 77
Score = 51.8 bits (125), Expect = 7e-09
Identities = 19/55 (34%), Positives = 32/55 (58%), Gaps = 2/55 (3%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VRYLMGGRTFECLDAVINRY 217
+FLVR S++ PGDY+L + +++ +RI+ Y+ GG TF L ++ Y
Sbjct: 23 TFLVRESESKPGDYTLSVRDDGRVKHYRIQSLDNGGYYISGGVTFNSLPELVEHY 77
>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 = 67.5 bits (165), Expect = 2e-14
Identities = 25/79 (31%), Positives = 40/79 (50%), Gaps = 4/79 (5%)
Query: 58 DWFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSL-FFHINNQIQRFRIEKKAVRYL 116
WFH ++ +A +L G+FLVR S + PGDY L + +++ + IE+ Y
Sbjct: 1 PWFHGSISREEAERLLRGKPDGTFLVRESSSEPGDYVLSVRSGDGKVKHYLIERNEGGYY 60
Query: 117 MG---GRTFECLDAVINRY 132
+ GRTF L ++ Y
Sbjct: 61 LLGGSGRTFPSLPELVEHY 79
Score = 45.5 bits (108), Expect = 1e-06
Identities = 19/57 (33%), Positives = 30/57 (52%), Gaps = 4/57 (7%)
Query: 165 SFLVRPSDNSPGDYSL-FFHINNQIQRFRIEKKAVRYLMG---GRTFECLDAVINRY 217
+FLVR S + PGDY L + +++ + IE+ Y + GRTF L ++ Y
Sbjct: 23 TFLVRESSSEPGDYVLSVRSGDGKVKHYLIERNEGGYYLLGGSGRTFPSLPELVEHY 79
>gnl|CDD|214617 smart00323, RasGAP, GTPase-activator protein for Ras-like GTPases.
All alpha-helical domain that accelerates the GTPase
activity of Ras, thereby "switching" it into an "off"
position. Improved domain limits from structure.
Length = 344
Score = 64.6 bits (158), Expect = 1e-11
Identities = 31/62 (50%), Positives = 45/62 (72%), Gaps = 2/62 (3%)
Query: 248 GEWGSLRLKFRYSHDLVMPSEEYSPLQQLLLES-DLAVVKALADVCHG-DRNRLASSLLR 305
G+ GSLRLK Y+ D ++PSE Y L +LLL S DL++ AL++VC G D++ LA+ L+R
Sbjct: 4 GDLGSLRLKTVYTTDFILPSEYYEELLELLLFSLDLSLASALSEVCSGLDKDELATKLVR 63
Query: 306 IF 307
+F
Sbjct: 64 LF 65
>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 = 58.4 bits (142), Expect = 6e-11
Identities = 28/84 (33%), Positives = 46/84 (54%), Gaps = 3/84 (3%)
Query: 59 WFHPECTKNDAVDMLVKAG-PGSFLVRPSDNSPGDYSLFFHINNQ-IQRFRIEKKAVRYL 116
WFH + +A +L++ G PGSFLVR S + PGD+ L ++ + I + +Y
Sbjct: 2 WFHGHLSGKEAEKLLLEKGKPGSFLVRESQSKPGDFVLSVRTDDDKVTHIMIRCQGGKYD 61
Query: 117 MGGR-TFECLDAVINRYRKEQIVE 139
+GG F+ L ++ Y+K +VE
Sbjct: 62 VGGGEEFDSLTDLVEHYKKNPMVE 85
Score = 46.5 bits (111), Expect = 9e-07
Identities = 21/72 (29%), Positives = 36/72 (50%), Gaps = 2/72 (2%)
Query: 155 KIATKGSCHKSFLVRPSDNSPGDYSLFFHINNQ-IQRFRIEKKAVRYLMGGR-TFECLDA 212
K+ + SFLVR S + PGD+ L ++ + I + +Y +GG F+ L
Sbjct: 14 KLLLEKGKPGSFLVRESQSKPGDFVLSVRTDDDKVTHIMIRCQGGKYDVGGGEEFDSLTD 73
Query: 213 VINRYRKEQIVE 224
++ Y+K +VE
Sbjct: 74 LVEHYKKNPMVE 85
>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 = 55.4 bits (134), Expect = 7e-10
Identities = 28/89 (31%), Positives = 46/89 (51%), Gaps = 10/89 (11%)
Query: 59 WFHPECT--KNDAVDMLVK---AGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAV 113
WFH + +++A +L++ G G+FLVR S+ GDY+L F N ++Q RI +
Sbjct: 6 WFHGKLGDGRDEAEKLLLEYCEGGDGTFLVRESETFVGDYTLSFWRNGKVQHCRIRSRQE 65
Query: 114 R-----YLMGGRTFECLDAVINRYRKEQI 137
YL F+ L +I+ YR+ +
Sbjct: 66 NGEKKYYLTDNLVFDSLYELIDYYRQNPL 94
Score = 46.2 bits (110), Expect = 1e-06
Identities = 22/69 (31%), Positives = 33/69 (47%), Gaps = 8/69 (11%)
Query: 162 CHK---SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVR-----YLMGGRTFECLDAV 213
C +FLVR S+ GDY+L F N ++Q RI + YL F+ L +
Sbjct: 26 CEGGDGTFLVRESETFVGDYTLSFWRNGKVQHCRIRSRQENGEKKYYLTDNLVFDSLYEL 85
Query: 214 INRYRKEQI 222
I+ YR+ +
Sbjct: 86 IDYYRQNPL 94
>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 = 54.7 bits (132), Expect = 1e-09
Identities = 26/80 (32%), Positives = 43/80 (53%), Gaps = 2/80 (2%)
Query: 59 WFHPECTKNDAVDMLVKAGP-GSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRY-L 116
WFHP + +A ++L G GSFL RPS ++PGD++L +++ +I+ Y L
Sbjct: 2 WFHPVISGIEAENLLKTRGVDGSFLARPSKSNPGDFTLSVRRGDEVTHIKIQNTGDYYDL 61
Query: 117 MGGRTFECLDAVINRYRKEQ 136
GG F L ++ Y ++
Sbjct: 62 YGGEKFATLSELVQYYMEQH 81
Score = 44.3 bits (105), Expect = 5e-06
Identities = 18/60 (30%), Positives = 31/60 (51%), Gaps = 1/60 (1%)
Query: 163 HKSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRY-LMGGRTFECLDAVINRYRKEQ 221
SFL RPS ++PGD++L +++ +I+ Y L GG F L ++ Y ++
Sbjct: 22 DGSFLARPSKSNPGDFTLSVRRGDEVTHIKIQNTGDYYDLYGGEKFATLSELVQYYMEQH 81
>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 = 52.7 bits (127), Expect = 5e-09
Identities = 25/82 (30%), Positives = 49/82 (59%), Gaps = 2/82 (2%)
Query: 58 DWFHPECTKNDAVDMLVKAGP-GSFLVRPSDNSPGDYSLFFHINNQIQRFRIEK-KAVRY 115
WFH + ++ +A ++L+ P G+FL+R S++SPGD+SL N +Q F++ + A +Y
Sbjct: 4 PWFHGKISRAEAEEILMNQRPDGAFLIRESESSPGDFSLSVKFGNDVQHFKVLRDGAGKY 63
Query: 116 LMGGRTFECLDAVINRYRKEQI 137
+ F L+ +++ +R +
Sbjct: 64 FLWVVKFNSLNELVDYHRTTSV 85
Score = 35.3 bits (82), Expect = 0.006
Identities = 18/59 (30%), Positives = 35/59 (59%), Gaps = 1/59 (1%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEK-KAVRYLMGGRTFECLDAVINRYRKEQI 222
+FL+R S++SPGD+SL N +Q F++ + A +Y + F L+ +++ +R +
Sbjct: 27 AFLIRESESSPGDFSLSVKFGNDVQHFKVLRDGAGKYFLWVVKFNSLNELVDYHRTTSV 85
>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 = 51.3 bits (123), Expect = 1e-08
Identities = 26/79 (32%), Positives = 38/79 (48%), Gaps = 4/79 (5%)
Query: 58 DWFHPECTKNDAVDMLVKAG--PGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRY 115
W H +N+AV++L + GSFLVR S PG Y L N + F I+ + ++
Sbjct: 1 QWLHGALDRNEAVEILKQKADADGSFLVRYSRRRPGGYVLTLVYENHVYHFEIQNRDDKW 60
Query: 116 LM--GGRTFECLDAVINRY 132
G FE L+ +I Y
Sbjct: 61 FYIDDGPYFESLEHLIEHY 79
Score = 36.6 bits (85), Expect = 0.002
Identities = 19/55 (34%), Positives = 26/55 (47%), Gaps = 2/55 (3%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLM--GGRTFECLDAVINRY 217
SFLVR S PG Y L N + F I+ + ++ G FE L+ +I Y
Sbjct: 25 SFLVRYSRRRPGGYVLTLVYENHVYHFEIQNRDDKWFYIDDGPYFESLEHLIEHY 79
>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 = 51.4 bits (123), Expect = 1e-08
Identities = 24/80 (30%), Positives = 45/80 (56%), Gaps = 1/80 (1%)
Query: 59 WFHPECTKNDAVDMLVKAG-PGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLM 117
W++ T++ A +L + G G FL+R S+++PGDYS+ + + F+++ Y +
Sbjct: 3 WYYGRITRHQAETLLNEHGHEGDFLIRDSESNPGDYSVSLKAPGRNKHFKVQVVDNVYCI 62
Query: 118 GGRTFECLDAVINRYRKEQI 137
G R F +D ++ Y+K I
Sbjct: 63 GQRKFHTMDELVEHYKKAPI 82
Score = 45.2 bits (107), Expect = 2e-06
Identities = 18/57 (31%), Positives = 33/57 (57%)
Query: 166 FLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRTFECLDAVINRYRKEQI 222
FL+R S+++PGDYS+ + + F+++ Y +G R F +D ++ Y+K I
Sbjct: 26 FLIRDSESNPGDYSVSLKAPGRNKHFKVQVVDNVYCIGQRKFHTMDELVEHYKKAPI 82
>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 = 51.5 bits (124), Expect = 1e-08
Identities = 24/85 (28%), Positives = 40/85 (47%), Gaps = 13/85 (15%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMG 118
WFH + ++ +A +L G FLVR S N PGDY+L +++ +R+ +
Sbjct: 5 WFHGKISREEAERLLQPPEDGLFLVRESTNYPGDYTLCVSFEGKVEHYRVIYR------N 58
Query: 119 GR-------TFECLDAVINRYRKEQ 136
G+ FE L ++ Y K+
Sbjct: 59 GKLTIDEEEYFENLIQLVEHYTKDA 83
Score = 34.6 bits (80), Expect = 0.012
Identities = 18/63 (28%), Positives = 29/63 (46%), Gaps = 13/63 (20%)
Query: 166 FLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGR-------TFECLDAVINRYR 218
FLVR S N PGDY+L +++ +R+ + G+ FE L ++ Y
Sbjct: 27 FLVRESTNYPGDYTLCVSFEGKVEHYRVIYR------NGKLTIDEEEYFENLIQLVEHYT 80
Query: 219 KEQ 221
K+
Sbjct: 81 KDA 83
>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 = 50.6 bits (121), Expect = 3e-08
Identities = 27/75 (36%), Positives = 37/75 (49%), Gaps = 1/75 (1%)
Query: 59 WFHPECTKNDAVDMLVKAG-PGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLM 117
W+H + A + L +AG GS+L+R SD PG + L F + FRI Y +
Sbjct: 21 WYHGRLDRTIAEERLRQAGKLGSYLIRESDRRPGSFVLSFLSRTGVNHFRIIAMCGDYYI 80
Query: 118 GGRTFECLDAVINRY 132
GGR F L +I Y
Sbjct: 81 GGRRFSSLSDLIGYY 95
Score = 41.7 bits (98), Expect = 4e-05
Identities = 20/53 (37%), Positives = 26/53 (49%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRTFECLDAVINRY 217
S+L+R SD PG + L F + FRI Y +GGR F L +I Y
Sbjct: 43 SYLIRESDRRPGSFVLSFLSRTGVNHFRIIAMCGDYYIGGRRFSSLSDLIGYY 95
>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 = 47.3 bits (113), Expect = 1e-07
Identities = 18/43 (41%), Positives = 27/43 (62%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 45
D DE++FQ+GD+ + DGW+ T RTG+ GM+ + VE
Sbjct: 12 DDDEVSFQEGDVIINVEIIDDGWMEGTVQRTGQSGMLPANYVE 54
>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 = 48.7 bits (117), Expect = 1e-07
Identities = 25/87 (28%), Positives = 42/87 (48%), Gaps = 9/87 (10%)
Query: 58 DWFHPECTKNDAVDMLVKAG--PGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRY 115
+WF + + DA +L+ G G+FL+R S+ +PG YSL + + ++ +R
Sbjct: 4 EWFFGKIKRKDAEKLLLAPGNPRGTFLIRESETTPGAYSLSVRDGDDARGDTVKHYRIRK 63
Query: 116 L-MGG------RTFECLDAVINRYRKE 135
L GG TF L ++ Y K+
Sbjct: 64 LDNGGYYITTRATFPTLQELVQHYSKD 90
Score = 33.7 bits (78), Expect = 0.025
Identities = 18/63 (28%), Positives = 30/63 (47%), Gaps = 7/63 (11%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYL-MGG------RTFECLDAVINRY 217
+FL+R S+ +PG YSL + + ++ +R L GG TF L ++ Y
Sbjct: 28 TFLIRESETTPGAYSLSVRDGDDARGDTVKHYRIRKLDNGGYYITTRATFPTLQELVQHY 87
Query: 218 RKE 220
K+
Sbjct: 88 SKD 90
>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 = 48.5 bits (115), Expect = 2e-07
Identities = 23/80 (28%), Positives = 45/80 (56%), Gaps = 1/80 (1%)
Query: 59 WFHPECTKNDAVDMLVKAG-PGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLM 117
W++ + T++ A L + G G FL+R S++SP D+S+ + + F+++ K Y +
Sbjct: 3 WYYGKVTRHQAEMALNERGNEGDFLIRDSESSPNDFSVSLKAQGKNKHFKVQLKECVYCI 62
Query: 118 GGRTFECLDAVINRYRKEQI 137
G R F ++ ++ Y+K I
Sbjct: 63 GQRKFSSMEELVEHYKKAPI 82
Score = 43.5 bits (102), Expect = 1e-05
Identities = 21/76 (27%), Positives = 41/76 (53%), Gaps = 1/76 (1%)
Query: 147 VTRMSRQWKIATKGSCHKSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRT 206
VTR + + +G+ FL+R S++SP D+S+ + + F+++ K Y +G R
Sbjct: 8 VTRHQAEMALNERGN-EGDFLIRDSESSPNDFSVSLKAQGKNKHFKVQLKECVYCIGQRK 66
Query: 207 FECLDAVINRYRKEQI 222
F ++ ++ Y+K I
Sbjct: 67 FSSMEELVEHYKKAPI 82
>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 = 48.2 bits (115), Expect = 3e-07
Identities = 35/99 (35%), Positives = 52/99 (52%), Gaps = 8/99 (8%)
Query: 59 WFHPECTKNDAVDMLVKAG-PGSFLVRPSDNSPGDYSLFFHINNQIQRFRI-----EKKA 112
W+H T++ A ++L KAG GSFLVR S++ G Y+L N + +RI +K +
Sbjct: 5 WYHGNITRSKAEELLSKAGKDGSFLVRDSESVSGAYALCVLYQNCVHTYRILPNAEDKLS 64
Query: 113 VRYLMG--GRTFECLDAVINRYRKEQIVEGHTLGFPVTR 149
V+ G R F L +I Y+KE + L +PV R
Sbjct: 65 VQASEGVPVRFFTTLPELIEFYQKENMGLVTHLLYPVER 103
Score = 32.8 bits (75), Expect = 0.056
Identities = 26/77 (33%), Positives = 38/77 (49%), Gaps = 7/77 (9%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRI-----EKKAVRYLMG--GRTFECLDAVINRY 217
SFLVR S++ G Y+L N + +RI +K +V+ G R F L +I Y
Sbjct: 27 SFLVRDSESVSGAYALCVLYQNCVHTYRILPNAEDKLSVQASEGVPVRFFTTLPELIEFY 86
Query: 218 RKEQIVEGHTLGFPVTR 234
+KE + L +PV R
Sbjct: 87 QKENMGLVTHLLYPVER 103
>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 = 47.3 bits (112), Expect = 4e-07
Identities = 23/81 (28%), Positives = 44/81 (54%), Gaps = 1/81 (1%)
Query: 58 DWFHPECTKNDAVDMLVKAG-PGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYL 116
+W++ T++ A L + G G FL+R S++SP D+S+ + + F+++ Y
Sbjct: 2 EWYYGNVTRHQAECALNERGVEGDFLIRDSESSPSDFSVSLKAVGKNKHFKVQLVDNVYC 61
Query: 117 MGGRTFECLDAVINRYRKEQI 137
+G R F +D ++ Y+K I
Sbjct: 62 IGQRRFNSMDELVEHYKKAPI 82
Score = 41.2 bits (96), Expect = 7e-05
Identities = 21/76 (27%), Positives = 39/76 (51%), Gaps = 1/76 (1%)
Query: 147 VTRMSRQWKIATKGSCHKSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRT 206
VTR + + +G FL+R S++SP D+S+ + + F+++ Y +G R
Sbjct: 8 VTRHQAECALNERG-VEGDFLIRDSESSPSDFSVSLKAVGKNKHFKVQLVDNVYCIGQRR 66
Query: 207 FECLDAVINRYRKEQI 222
F +D ++ Y+K I
Sbjct: 67 FNSMDELVEHYKKAPI 82
>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 = 46.5 bits (110), Expect = 6e-07
Identities = 24/78 (30%), Positives = 39/78 (50%), Gaps = 4/78 (5%)
Query: 59 WFHPECTKNDAVDMLVKA--GPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VR 114
W+ ++ A +L+ PG+FL+RPS++S G YSL ++ +RI
Sbjct: 2 WYFSGISRTQAQQLLLSPPNEPGAFLIRPSESSLGGYSLSVRAQAKVCHYRICMAPSGSL 61
Query: 115 YLMGGRTFECLDAVINRY 132
YL GR F L+ ++ Y
Sbjct: 62 YLQKGRLFPGLEELLAYY 79
Score = 42.3 bits (99), Expect = 2e-05
Identities = 21/73 (28%), Positives = 36/73 (49%), Gaps = 2/73 (2%)
Query: 147 VTRMSRQWKIATKGSCHKSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VRYLMGG 204
++R Q + + + +FL+RPS++S G YSL ++ +RI YL G
Sbjct: 7 ISRTQAQQLLLSPPNEPGAFLIRPSESSLGGYSLSVRAQAKVCHYRICMAPSGSLYLQKG 66
Query: 205 RTFECLDAVINRY 217
R F L+ ++ Y
Sbjct: 67 RLFPGLEELLAYY 79
>gnl|CDD|198210 cd10347, SH2_Nterm_shark_like, N-terminal Src homology 2 (SH2)
domain found in SH2 domains, ANK, and kinase domain
(shark) proteins. These non-receptor protein-tyrosine
kinases contain two SH2 domains, five ankyrin (ANK)-like
repeats, and a potential tyrosine phosphorylation site
in the carboxyl-terminal tail which resembles the
phosphorylation site in members of the src family. Like,
mammalian non-receptor protein-tyrosine kinases, ZAP-70
and syk proteins, they do not have SH3 domains. However,
the presence of ANK makes these unique among
protein-tyrosine kinases. Both tyrosine kinases and ANK
repeats have been shown to transduce developmental
signals, and SH2 domains are known to participate
intimately in tyrosine kinase signaling. These tyrosine
kinases are believed to be involved in epithelial cell
polarity. The members of this family include the shark
(SH2 domains, ANK, and kinase domain) gene in Drosophila
and yellow fever mosquitos, as well as the hydra protein
HTK16. Drosophila Shark is proposed to transduce
intracellularly the Crumbs, a protein necessary for
proper organization of ectodermal epithelia,
intercellular signal. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 81
Score = 45.8 bits (109), Expect = 9e-07
Identities = 24/79 (30%), Positives = 39/79 (49%), Gaps = 5/79 (6%)
Query: 59 WFHPECTKNDAVDMLVKAGP--GSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKK---AV 113
W+H + ++ A +L++ G G FLVR S ++PGDY L ++ ++I + A
Sbjct: 3 WYHGKISREVAEALLLREGGRDGLFLVRESTSAPGDYVLSLLAQGEVLHYQIRRHGEDAF 62
Query: 114 RYLMGGRTFECLDAVINRY 132
G F LD +I Y
Sbjct: 63 FSDDGPLIFHGLDTLIEHY 81
Score = 33.9 bits (78), Expect = 0.016
Identities = 18/55 (32%), Positives = 26/55 (47%), Gaps = 3/55 (5%)
Query: 166 FLVRPSDNSPGDYSLFFHINNQIQRFRIEKK---AVRYLMGGRTFECLDAVINRY 217
FLVR S ++PGDY L ++ ++I + A G F LD +I Y
Sbjct: 27 FLVRESTSAPGDYVLSLLAQGEVLHYQIRRHGEDAFFSDDGPLIFHGLDTLIEHY 81
>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 = 44.5 bits (106), Expect = 2e-06
Identities = 16/38 (42%), Positives = 22/38 (57%), Gaps = 1/38 (2%)
Query: 2 PDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
D DEL+F+KGDI V + DGW R G++G+
Sbjct: 14 QDPDELSFKKGDIITVLEKSDDGWWKGRLGR-GKEGLF 50
>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 = 44.2 bits (104), Expect = 2e-06
Identities = 18/43 (41%), Positives = 27/43 (62%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 45
D DE++FQ GD ++ DGW++ T RTG+ GM+ + VE
Sbjct: 15 DEDEVSFQDGDTIVNVQQIDDGWMYGTVERTGDTGMLPANYVE 57
>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 = 43.7 bits (104), Expect = 3e-06
Identities = 16/37 (43%), Positives = 24/37 (64%), Gaps = 1/37 (2%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
+ DEL+F+KGDI V + DGW W + G++G+I
Sbjct: 10 EPDELSFKKGDIIIVLEKSDDGW-WKGRLKGGKEGLI 45
>gnl|CDD|176045 cd08400, C2_Ras_p21A1, C2 domain present in RAS p21 protein
activator 1 (RasA1). RasA1 is a GAP1 (GTPase activating
protein 1), a Ras-specific GAP member, which suppresses
Ras function by enhancing the GTPase activity of Ras
proteins resulting in the inactive GDP-bound form of
Ras. In this way it can control cellular proliferation
and differentiation. RasA1 contains a C2 domain, a
Ras-GAP domain, a pleckstrin homology (PH)-like domain,
a SH3 domain, and 2 SH2 domains. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members here have a type-I
topology.
Length = 126
Score = 45.4 bits (108), Expect = 4e-06
Identities = 16/31 (51%), Positives = 24/31 (77%), Gaps = 2/31 (6%)
Query: 235 TEDWFSLAGVTP--IGEWGSLRLKFRYSHDL 263
T++W+ L+ +P GEWGSLR++ RYSH+L
Sbjct: 96 TDEWYPLSSASPLKGGEWGSLRIRARYSHEL 126
>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 = 42.1 bits (100), Expect = 1e-05
Identities = 15/38 (39%), Positives = 21/38 (55%), Gaps = 1/38 (2%)
Query: 2 PDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
D DEL+F+KGDI V + DGW + G +G+
Sbjct: 11 QDDDELSFKKGDIITVLEKDDDGWWEGELNG-GREGLF 47
>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 = 42.4 bits (99), Expect = 2e-05
Identities = 27/95 (28%), Positives = 46/95 (48%), Gaps = 6/95 (6%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMG 118
W+H ++ DA ++L S+LVR S S DYSL N ++ K +Y++G
Sbjct: 3 WYHGAISRGDAENLLRLCKECSYLVRNSQTSKHDYSLSLKSNQGFMHMKLAKTKEKYVLG 62
Query: 119 GRT--FECLDAVINRYRKEQI----VEGHTLGFPV 147
+ F+ + VI+ Y ++ E +L +PV
Sbjct: 63 QNSPPFDSVPEVIHYYTTRKLPIKGAEHLSLLYPV 97
Score = 32.4 bits (73), Expect = 0.070
Identities = 22/74 (29%), Positives = 36/74 (48%), Gaps = 6/74 (8%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGRT--FECLDAVINRYRKEQI 222
S+LVR S S DYSL N ++ K +Y++G + F+ + VI+ Y ++
Sbjct: 24 SYLVRNSQTSKHDYSLSLKSNQGFMHMKLAKTKEKYVLGQNSPPFDSVPEVIHYYTTRKL 83
Query: 223 ----VEGHTLGFPV 232
E +L +PV
Sbjct: 84 PIKGAEHLSLLYPV 97
>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 = 41.9 bits (98), Expect = 4e-05
Identities = 26/87 (29%), Positives = 40/87 (45%), Gaps = 9/87 (10%)
Query: 58 DWFHPECTKNDAVDMLVKAG--PGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRY 115
+WF + T+ DA L+ G G+FL+R S+ G YSL + I+ +R
Sbjct: 4 EWFFKDITRKDAERQLLAPGNSAGAFLIRESETLKGSYSLSVRDYDPQHGDVIKHYKIRS 63
Query: 116 LMGGR-------TFECLDAVINRYRKE 135
L G TF C+ +I Y+K+
Sbjct: 64 LDNGGYYISPRITFPCISDMIKHYQKQ 90
Score = 30.0 bits (67), Expect = 0.69
Identities = 21/81 (25%), Positives = 36/81 (44%), Gaps = 7/81 (8%)
Query: 147 VTRMSRQWKIATKGSCHKSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGR- 205
+TR + ++ G+ +FL+R S+ G YSL + I+ +R L G
Sbjct: 10 ITRKDAERQLLAPGNSAGAFLIRESETLKGSYSLSVRDYDPQHGDVIKHYKIRSLDNGGY 69
Query: 206 ------TFECLDAVINRYRKE 220
TF C+ +I Y+K+
Sbjct: 70 YISPRITFPCISDMIKHYQKQ 90
>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 = 41.6 bits (98), Expect = 5e-05
Identities = 27/83 (32%), Positives = 42/83 (50%), Gaps = 15/83 (18%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSL-------FFHINNQIQRFRIEKK 111
W+H T+ +A +L GS+LVR S+++ DYSL F H+ +IQR +
Sbjct: 3 WYHGAITRIEAESLLRPCKEGSYLVRNSESTKQDYSLSLKSAKGFMHM--RIQRNETGQ- 59
Query: 112 AVRYLMG--GRTFECLDAVINRY 132
Y++G R FE + +I Y
Sbjct: 60 ---YILGQFSRPFETIPEMIRHY 79
Score = 32.0 bits (73), Expect = 0.11
Identities = 21/62 (33%), Positives = 32/62 (51%), Gaps = 15/62 (24%)
Query: 165 SFLVRPSDNSPGDYSL-------FFHINNQIQRFRIEKKAVRYLMG--GRTFECLDAVIN 215
S+LVR S+++ DYSL F H+ +IQR + Y++G R FE + +I
Sbjct: 24 SYLVRNSESTKQDYSLSLKSAKGFMHM--RIQRNETGQ----YILGQFSRPFETIPEMIR 77
Query: 216 RY 217
Y
Sbjct: 78 HY 79
>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 = 40.0 bits (93), Expect = 7e-05
Identities = 16/45 (35%), Positives = 27/45 (60%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVEDL 47
D DE++F+ GD + +GW++ T RTG+ GM+ + VE +
Sbjct: 14 DDDEVSFKDGDTIVNVQTIDEGWMYGTVQRTGKTGMLPANYVEAI 58
>gnl|CDD|198181 cd09927, SH2_Tensin_like, Src homology 2 domain found in
Tensin-like proteins. SH2 domain found in Tensin-like
proteins. The Tensins are a family of intracellular
proteins that interact with receptor tyrosine kinases
(RTKs), integrins, and actin. They are thought act as
signaling bridges between the extracellular space and
the cytoskeleton. There are four homologues: Tensin1,
Tensin2 (TENC1, C1-TEN), Tensin3 and Tensin4 (cten), all
of which contain a C-terminal tandem SH2-PTB domain
pairing, as well as actin-binding regions that may
localize them to focal adhesions. The isoforms of
Tensin2 and Tensin3 contain N-terminal C1 domains, which
are atypical and not expected to bind to phorbol esters.
Tensins 1-3 contain a phosphatase (PTPase) and C2 domain
pairing which resembles PTEN (phosphatase and tensin
homologue deleted on chromosome 10) protein. PTEN is a
lipid phosphatase that dephosphorylates
phosphatidylinositol 3,4,5-trisphosphate
(PtdIns(3,4,5)P3) to yield phosphatidylinositol
4,5-bisphosphate (PtdIns(4,5)P2). As PtdIns(3,4,5)P3 is
the product of phosphatidylinositol 3-kinase (PI3K)
activity, PTEN is therefore a key negative regulator of
the PI3K pathway. Because of their PTEN-like domains,
the Tensins may also possess phosphoinositide-binding or
phosphatase capabilities. However, only Tensin2 and
Tensin3 have the potential to be phosphatases since only
their PTPase domains contain a cysteine residue that is
essential for catalytic activity. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 116
Score = 41.3 bits (97), Expect = 9e-05
Identities = 25/101 (24%), Positives = 41/101 (40%), Gaps = 23/101 (22%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSL----------------FFHINNQ 102
W+ P +++ A+ +L PG+FLVR S G Y L ++
Sbjct: 5 WYKPNISRDQAIALLKDKPPGTFLVRDSTTYKGAYGLAVKVATPPPGVNPFEAKGDPESE 64
Query: 103 IQR-FRIE--KKAVRYLMGGRT---FECLDAVINRYRKEQI 137
+ R F IE K V+ L G F L A++ ++ +
Sbjct: 65 LVRHFLIEPSPKGVK-LKGCPNEPVFGSLSALVYQHSITPL 104
>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 = 40.9 bits (96), Expect = 1e-04
Identities = 28/97 (28%), Positives = 46/97 (47%), Gaps = 7/97 (7%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEK------KA 112
W+ ++ +A ++L G FLVR S PGDY L N+++ + I
Sbjct: 9 WYFGPMSRQEAQELLQGQRHGVFLVRDSSTIPGDYVLSVSENSRVSHYIINSLGQPAPNQ 68
Query: 113 VRYLMGGRTFECLDAVINRYRKEQIVEGHTLGFPVTR 149
RY +G + F+ L A++ Y K ++ TL P +R
Sbjct: 69 SRYRIGDQEFDDLPALLEFY-KLHYLDTTTLIEPASR 104
Score = 37.1 bits (86), Expect = 0.002
Identities = 31/97 (31%), Positives = 44/97 (45%), Gaps = 12/97 (12%)
Query: 149 RMSRQWKIATK---GSCHKSFLVRPSDNSPGDYSLFFHINNQIQRFRIEK------KAVR 199
MSRQ A + G H FLVR S PGDY L N+++ + I R
Sbjct: 13 PMSRQ--EAQELLQGQRHGVFLVRDSSTIPGDYVLSVSENSRVSHYIINSLGQPAPNQSR 70
Query: 200 YLMGGRTFECLDAVINRYRKEQIVEGHTLGFPVTRTE 236
Y +G + F+ L A++ Y K ++ TL P +R
Sbjct: 71 YRIGDQEFDDLPALLEFY-KLHYLDTTTLIEPASRGR 106
>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 = 39.6 bits (92), Expect = 1e-04
Identities = 15/43 (34%), Positives = 25/43 (58%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 45
D DE++F+ GD + +GW++ T RTG GM+ + +E
Sbjct: 13 DEDEVSFRDGDYIVNVQPIDEGWMYGTVQRTGRTGMLPANYIE 55
>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 = 38.6 bits (90), Expect = 2e-04
Identities = 19/45 (42%), Positives = 26/45 (57%), Gaps = 1/45 (2%)
Query: 2 PDTD-ELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 45
P ++ EL ++GDI FVH + DGW T RTG+ G+ VE
Sbjct: 10 PQSEAELELKEGDIVFVHKKREDGWFKGTLQRTGKTGLFPGSFVE 54
>gnl|CDD|198218 cd10355, SH2_DAPP1_BAM32_like, Src homology 2 domain found in dual
adaptor for phosphotyrosine and 3-phosphoinositides (
DAPP1)/B lymphocyte adaptor molecule of 32 kDa
(Bam32)-like proteins. DAPP1/Bam32 contains a putative
myristoylation site at its N-terminus, followed by a SH2
domain, and a pleckstrin homology (PH) domain at its
C-terminus. DAPP1 could potentially be recruited to the
cell membrane by any of these domains. Its putative
myristoylation site could facilitate the interaction of
DAPP1 with the lipid bilayer. Its SH2 domain may also
interact with phosphotyrosine residues on
membrane-associated proteins such as activated tyrosine
kinase receptors. And finally its PH domain exhibits a
high-affinity interaction with the PtdIns(3,4,5)P(3)
PtdIns(3,4)P(2) second messengers produced at the cell
membrane following the activation of PI 3-kinases. DAPP1
is thought to interact with both tyrosine phosphorylated
proteins and 3-phosphoinositides and therefore may play
a role in regulating the location and/or activity of
such proteins(s) in response to agonists that elevate
PtdIns(3,4,5)P(3) and PtdIns(3,4)P(2). This protein is
likely to play an important role in triggering signal
transduction pathways that lie downstream from receptor
tyrosine kinases and PI 3-kinase. It is likely that
DAPP1 functions as an adaptor to recruit other proteins
to the plasma membrane in response to extracellular
signals. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 92
Score = 39.4 bits (92), Expect = 2e-04
Identities = 20/89 (22%), Positives = 39/89 (43%), Gaps = 1/89 (1%)
Query: 55 TVFDWFHPECTKNDAVDMLVKAG-PGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAV 113
W+H T++ A +L+ G GS+L+R S+ G +SL + ++ F +E
Sbjct: 4 QSLGWYHGNLTRHAAEALLLSNGVDGSYLLRNSNEGTGLFSLSVRAKDSVKHFHVEYTGY 63
Query: 114 RYLMGGRTFECLDAVINRYRKEQIVEGHT 142
+ G F L + + + ++ T
Sbjct: 64 SFKFGFNEFSSLQDFVKHFANQPLIGSET 92
>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 = 37.9 bits (89), Expect = 3e-04
Identities = 11/35 (31%), Positives = 19/35 (54%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
D+L+F+KGD + ++ W TG++G I
Sbjct: 14 DDLSFKKGDRLQILDDSDGDWWLARHLSTGKEGYI 48
>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 = 39.3 bits (92), Expect = 3e-04
Identities = 26/92 (28%), Positives = 45/92 (48%), Gaps = 2/92 (2%)
Query: 57 FDWFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VR 114
W+H ++N A +L GSFLVR S++SPG YS+ + ++ +RI + +
Sbjct: 3 HSWYHGPISRNAAEYLLSSGINGSFLVRESESSPGQYSISLRYDGRVYHYRISEDSDGKV 62
Query: 115 YLMGGRTFECLDAVINRYRKEQIVEGHTLGFP 146
Y+ F L +++ + K TL +P
Sbjct: 63 YVTQEHRFNTLAELVHHHSKNADGLITTLRYP 94
Score = 30.0 bits (68), Expect = 0.41
Identities = 20/69 (28%), Positives = 35/69 (50%), Gaps = 2/69 (2%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VRYLMGGRTFECLDAVINRYRKEQI 222
SFLVR S++SPG YS+ + ++ +RI + + Y+ F L +++ + K
Sbjct: 26 SFLVRESESSPGQYSISLRYDGRVYHYRISEDSDGKVYVTQEHRFNTLAELVHHHSKNAD 85
Query: 223 VEGHTLGFP 231
TL +P
Sbjct: 86 GLITTLRYP 94
>gnl|CDD|198209 cd10346, SH2_SH2B_family, Src homology 2 (SH2) domain found in SH2B
adapter protein family. The SH2B adapter protein family
has 3 members: SH2B1 (SH2-B, PSM), SH2B2 (APS), and
SH2B3 (Lnk). SH2B family members contain a pleckstrin
homology domain, at least one dimerization domain, and a
C-terminal SH2 domain which binds to phosphorylated
tyrosines in a variety of tyrosine kinases. SH2B1 and
SH2B2 function in signaling pathways found downstream
of growth hormone receptor and receptor tyrosine
kinases, including the insulin, insulin-like growth
factor-I (IGF-I), platelet-derived growth factor (PDGF),
nerve growth factor, hepatocyte growth factor, and
fibroblast growth factor receptors. SH2B2beta, a new
isoform of SH2B2, is an endogenous inhibitor of SH2B1
and/or SH2B2 (SH2B2alpha), negatively regulating insulin
signaling and/or JAK2-mediated cellular responses. SH2B3
negatively regulates lymphopoiesis and early
hematopoiesis. The lnk-deficiency results in enhanced
production of B cells, and expansion as well as enhanced
function of hematopoietic stem cells (HSCs),
demonstrating negative regulatory functions of Sh2b3/Lnk
in cytokine signaling. Sh2b3/Lnk also functions in
responses controlled by cell adhesion and in crosstalk
between integrin- and cytokine-mediated signaling. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 97
Score = 38.2 bits (89), Expect = 8e-04
Identities = 15/56 (26%), Positives = 30/56 (53%), Gaps = 3/56 (5%)
Query: 56 VFDWFHPECTKNDAVDMLVKAGPGS---FLVRPSDNSPGDYSLFFHINNQIQRFRI 108
+ WFH +++DA +++ +G FLVR S+ G++ L F+ + + R+
Sbjct: 7 EYPWFHGTLSRSDAAQLVLHSGADGHGVFLVRQSETRRGEFVLTFNFQGRAKHLRL 62
>gnl|CDD|198184 cd09930, SH2_cSH2_p85_like, C-terminal Src homology 2 (cSH2) domain
found in p85. Phosphoinositide 3-kinases (PI3Ks) are
essential for cell growth, migration, and survival.
p110, the catalytic subunit, is composed of an
adaptor-binding domain, a Ras-binding domain, a C2
domain, a helical domain, and a kinase domain. The
regulatory unit is called p85 and is composed of an SH3
domain, a RhoGap domain, a N-terminal SH2 (nSH2) domain,
a inter SH2 (iSH2) domain, and C-terminal (cSH2) domain.
There are 2 inhibitory interactions between p110alpha
and p85 of P13K: 1) p85 nSH2 domain with the C2,
helical, and kinase domains of p110alpha and 2) p85 iSH2
domain with C2 domain of p110alpha. There are 3
inhibitory interactions between p110beta and p85 of
P13K: 1) p85 nSH2 domain with the C2, helical, and
kinase domains of p110beta, 2) p85 iSH2 domain with C2
domain of p110alpha, and 3) p85 cSH2 domain with the
kinase domain of p110alpha. It is interesting to note
that p110beta is oncogenic as a wild type protein while
p110alpha lacks this ability. One explanation is the
idea that the regulation of p110beta by p85 is unique
because of the addition of inhibitory contacts from the
cSH2 domain and the loss of contacts in the iSH2 domain.
In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 104
Score = 38.2 bits (89), Expect = 8e-04
Identities = 14/57 (24%), Positives = 25/57 (43%), Gaps = 1/57 (1%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRY 115
W + + A ++L G+FL+R S + G Y+ N +++ I K Y
Sbjct: 8 WLVGDINRTQAEELLRGKPDGTFLIRESS-TQGCYACSVVCNGEVKHCVIYKTETGY 63
>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 = 37.7 bits (88), Expect = 9e-04
Identities = 13/49 (26%), Positives = 27/49 (55%)
Query: 60 FHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRI 108
+H ++ +A +L A GS+L+R S G Y+L N +++ +++
Sbjct: 9 YHGLISREEAEQLLSGASDGSYLIRESSRDDGYYTLSLRFNGKVKNYKL 57
Score = 28.5 bits (64), Expect = 1.7
Identities = 8/29 (27%), Positives = 17/29 (58%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRI 193
S+L+R S G Y+L N +++ +++
Sbjct: 29 SYLIRESSRDDGYYTLSLRFNGKVKNYKL 57
>gnl|CDD|212873 cd11940, SH3_ARHGEF5_19, Src homology 3 domain of the Rho guanine
nucleotide exchange factors ARHGEF5 and ARHGEF19.
ARHGEF5, also called ephexin-3 or TIM (Transforming
immortalized mammary oncogene), is a potent activator
of RhoA and it plays roles in regulating cell shape,
adhesion, and migration. It binds to the SH3 domain of
Src and is involved in regulating Src-induced podosome
formation. ARHGEF19, also called ephexin-2 or WGEF
(weak-similarity GEF), is highly expressed in the
intestine, liver, heart and kidney. It activates RhoA,
Cdc42, and Rac 1, and has been shown to activate RhoA
in the Wnt-PCP (planar cell polarity) pathway. It is
involved in the regulation of cell polarity and
cytoskeletal reorganization. ARHGEF5 and ARHGEF19
contain RhoGEF (also called Dbl-homologous or DH),
Pleckstrin Homology (PH), and SH3 domains. The SH3
domains of ARHGEFs play an autoinhibitory role through
intramolecular interactions with a proline-rich region
N-terminal to the DH domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 55
Score = 36.7 bits (85), Expect = 0.001
Identities = 15/33 (45%), Positives = 18/33 (54%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 37
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 = 36.5 bits (85), Expect = 0.001
Identities = 10/35 (28%), Positives = 23/35 (65%), Gaps = 1/35 (2%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
+L+F+KG++ + ++ DGW W+ + G +G++
Sbjct: 14 GDLSFKKGEVLRIISKRADGW-WLAENSKGNRGLV 47
>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 = 36.5 bits (85), Expect = 0.001
Identities = 18/41 (43%), Positives = 23/41 (56%), Gaps = 5/41 (12%)
Query: 3 DTDELTFQKGDIFFV-----HNELGDGWLWVTAHRTGEQGM 38
DTDELTF+KGD+ V E +GWL TG +G+
Sbjct: 15 DTDELTFEKGDVILVIPFDDPEEQDEGWLMGVKESTGCRGV 55
>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 = 37.1 bits (86), Expect = 0.002
Identities = 21/68 (30%), Positives = 33/68 (48%), Gaps = 7/68 (10%)
Query: 72 MLVKAGPGSFLVRPSDNSPGDYSL-----FFHINNQIQRFRIEK--KAVRYLMGGRTFEC 124
ML GSFL+R S+ G YSL + ++ +RI + Y+ TF+C
Sbjct: 27 MLPGNQVGSFLIRESETRRGCYSLSVRHRGSQSRDSVKHYRIFRLDNGWFYISPRLTFQC 86
Query: 125 LDAVINRY 132
L+ ++N Y
Sbjct: 87 LEDMVNHY 94
Score = 33.2 bits (76), Expect = 0.043
Identities = 18/60 (30%), Positives = 30/60 (50%), Gaps = 7/60 (11%)
Query: 165 SFLVRPSDNSPGDYSL-----FFHINNQIQRFRIEK--KAVRYLMGGRTFECLDAVINRY 217
SFL+R S+ G YSL + ++ +RI + Y+ TF+CL+ ++N Y
Sbjct: 35 SFLIRESETRRGCYSLSVRHRGSQSRDSVKHYRIFRLDNGWFYISPRLTFQCLEDMVNHY 94
>gnl|CDD|198274 cd10411, SH2_SH2B2, Src homology 2 (SH2) domain found in SH2B
adapter proteins (SH2B1, SH2B2, SH2B3). SH2B2 (APS),
like other members of the SH2B adapter protein family,
contains a pleckstrin homology domain, at least one
dimerization domain, and a C-terminal SH2 domain which
binds to phosphorylated tyrosines in a variety of
tyrosine kinases. SH2B1 and SH2B2 function in signaling
pathways found downstream of growth hormone receptor and
receptor tyrosine kinases, including the insulin,
insulin-like growth factor-I (IGF-I), platelet-derived
growth factor (PDGF), nerve growth factor, hepatocyte
growth factor, and fibroblast growth factor receptors.
SH2B2beta, a new isoform of SH2B2, is an endogenous
inhibitor of SH2B1 and/or SH2B2 (SH2B2alpha), negatively
regulating insulin signaling and/or JAK2-mediated
cellular responses. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 97
Score = 36.5 bits (84), Expect = 0.002
Identities = 16/55 (29%), Positives = 30/55 (54%), Gaps = 3/55 (5%)
Query: 57 FDWFHPECTKNDAVDMLVKAGP---GSFLVRPSDNSPGDYSLFFHINNQIQRFRI 108
+ WFH ++ A +++ GP G F++R S+ PG+Y L F+ + + R+
Sbjct: 8 YPWFHGTLSRVKAAQLVLAGGPRSHGLFVIRQSETRPGEYVLTFNFQGKAKHLRL 62
Score = 26.9 bits (59), Expect = 5.8
Identities = 10/31 (32%), Positives = 18/31 (58%)
Query: 163 HKSFLVRPSDNSPGDYSLFFHINNQIQRFRI 193
H F++R S+ PG+Y L F+ + + R+
Sbjct: 32 HGLFVIRQSETRPGEYVLTFNFQGKAKHLRL 62
>gnl|CDD|198213 cd10350, SH2_SH2D4A, Src homology 2 domain found in the SH2 domain
containing protein 4A (SH2D4A). SH2D4A contains a
single SH2 domain. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 36.4 bits (84), Expect = 0.004
Identities = 21/62 (33%), Positives = 32/62 (51%), Gaps = 1/62 (1%)
Query: 54 NTVFDWFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAV 113
+T+ WFH T A ++L+ PGSFL+R S+ G Y+L + + F I+ A
Sbjct: 4 DTIAPWFHGILTLKKANELLLSTMPGSFLIRVSEKIKG-YALSYLSEEGCKHFLIDASAD 62
Query: 114 RY 115
Y
Sbjct: 63 SY 64
>gnl|CDD|198255 cd10392, SH2_SHF, Src homology 2 domain found in SH2
domain-containing adapter protein F (SHF). SHF is
thought to play a role in PDGF-receptor signaling and
regulation of apoptosis. SHF is mainly expressed in
skeletal muscle, brain, liver, prostate, testis, ovary,
small intestine, and colon. SHF contains four putative
tyrosine phosphorylation sites and an SH2 domain. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 98
Score = 36.2 bits (83), Expect = 0.004
Identities = 24/96 (25%), Positives = 47/96 (48%), Gaps = 7/96 (7%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEK-KAVRYLM 117
W+H ++ DA ++L S+LVR S+ S D+SL + ++ + K +Y++
Sbjct: 3 WYHGAISRTDAENLLRLCKEASYLVRNSETSKNDFSLSLKSSQGFMHMKLSRTKEHKYVL 62
Query: 118 GGRT--FECLDAVINRYRKEQI----VEGHTLGFPV 147
G + F + +I+ Y ++ E +L +PV
Sbjct: 63 GQNSPPFSSVPEIIHHYASRKLPIKGAEHMSLLYPV 98
>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 = 0.004
Identities = 14/35 (40%), Positives = 19/35 (54%), Gaps = 1/35 (2%)
Query: 6 ELTFQKGDIFFVHN-ELGDGWLWVTAHRTGEQGMI 39
EL+F KGD F V E W T TG++G++
Sbjct: 15 ELSFSKGDFFHVIGEEDQGEWYEATNPVTGKRGLV 49
>gnl|CDD|213339 cd05137, RasGAP_CLA2_BUD2, Ras-GTPase Activating Domain of
CLA2/BUD2. CLA2/BUD2 functions as a GTPase-activating
protein (GAP) for BUD1/RSR1 and is necessary for proper
bud-site selection in yeast. BUD2 has sequence
similarity to the catalytic domain of RasGAPs, and
stimulates the hydrolysis of BUD1-GTP to BUD1-GDP.
Elimination of Bud2p activity by mutation causes a
random budding pattern with no growth defect.
Overproduction of Bud2p also alters the budding pattern.
Length = 356
Score = 38.3 bits (90), Expect = 0.004
Identities = 21/53 (39%), Positives = 33/53 (62%), Gaps = 1/53 (1%)
Query: 256 KFRYSHDLVMPSEEYSPLQQLLLESDLAVVKALADVCHGDR-NRLASSLLRIF 307
K R ++V+PS+ Y PL++LL DL + +A++ GD+ RL+ LL IF
Sbjct: 1 KVRLDENVVLPSKNYKPLEELLHNFDLGLTLQIAELVPGDKLERLSEILLDIF 53
>gnl|CDD|199832 cd10417, SH2_SH2D7, Src homology 2 domain found in the SH2 domain
containing protein 7 (SH2D7). SH2D7 contains a single
SH2 domain. In general SH2 domains are involved in
signal transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 102
Score = 36.0 bits (83), Expect = 0.004
Identities = 25/82 (30%), Positives = 42/82 (51%), Gaps = 4/82 (4%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEK-KAVRYLM 117
WFH T+ +L GSFL+R SD + G Y L + +++ + F I + + RYL+
Sbjct: 9 WFHGFITRKQTEQLLRDKALGSFLIRLSDRATG-YILSYRGSDRCRHFVINQLRNRRYLI 67
Query: 118 GGRT--FECLDAVINRYRKEQI 137
G T L ++ Y++ Q+
Sbjct: 68 SGDTSSHSTLAELVRHYQEVQL 89
>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 = 35.8 bits (83), Expect = 0.006
Identities = 15/37 (40%), Positives = 21/37 (56%), Gaps = 2/37 (5%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSL 95
W+H + ++ DA +L G FLVR S +PG Y L
Sbjct: 9 WYHGKMSRRDAESLLQTDG--DFLVRESTTTPGQYVL 43
Score = 26.5 bits (59), Expect = 8.0
Identities = 9/15 (60%), Positives = 10/15 (66%)
Query: 166 FLVRPSDNSPGDYSL 180
FLVR S +PG Y L
Sbjct: 29 FLVRESTTTPGQYVL 43
>gnl|CDD|176029 cd08383, C2A_RasGAP, C2 domain (first repeat) of Ras GTPase
activating proteins (GAPs). RasGAPs suppress Ras
function by enhancing the GTPase activity of Ras
proteins resulting in the inactive GDP-bound form of
Ras. In this way it can control cellular proliferation
and differentiation. The proteins here all contain
either a single C2 domain or two tandem C2 domains, a
Ras-GAP domain, and a pleckstrin homology (PH)-like
domain. C2 domains fold into an 8-standed beta-sandwich
that can adopt 2 structural arrangements: Type I and
Type II, distinguished by a circular permutation
involving their N- and C-terminal beta strands. Many C2
domains are Ca2+-dependent membrane-targeting modules
that bind a wide variety of substances including bind
phospholipids, inositol polyphosphates, and
intracellular proteins. Most C2 domain proteins are
either signal transduction enzymes that contain a single
C2 domain, such as protein kinase C, or membrane
trafficking proteins which contain at least two C2
domains, such as synaptotagmin 1. However, there are a
few exceptions to this including RIM isoforms and some
splice variants of piccolo/aczonin and intersectin which
only have a single C2 domain. C2 domains with a calcium
binding region have negatively charged residues,
primarily aspartates, that serve as ligands for calcium
ions. Members here have a type-I topology.
Length = 117
Score = 35.7 bits (83), Expect = 0.008
Identities = 12/26 (46%), Positives = 16/26 (61%), Gaps = 1/26 (3%)
Query: 235 TEDWFSLAGVTPIGE-WGSLRLKFRY 259
++WF L V P E GS+RL+ RY
Sbjct: 92 KDEWFPLTPVDPDSEVQGSVRLRARY 117
>gnl|CDD|198214 cd10351, SH2_SH2D4B, Src homology 2 domain found in the SH2 domain
containing protein 4B (SH2D4B). SH2D4B contains a
single SH2 domain. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 35.3 bits (81), Expect = 0.009
Identities = 18/56 (32%), Positives = 32/56 (57%), Gaps = 1/56 (1%)
Query: 54 NTVFDWFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIE 109
T+ WFH ++ +A +L+ A GSFLVR S+ G Y+L + + + + F ++
Sbjct: 4 KTIAPWFHGIISREEAEALLMNATEGSFLVRVSEKIWG-YTLSYRLQSGFKHFLVD 58
>gnl|CDD|198174 cd09918, SH2_Nterm_SPT6_like, N-terminal Src homology 2 (SH2)
domain found in Spt6. N-terminal SH2 domain in Spt6.
Spt6 is an essential transcription elongation factor and
histone chaperone that binds the C-terminal repeat
domain (CTD) of RNA polymerase II. Spt6 contains a
tandem SH2 domain with a novel structure and CTD-binding
mode. The tandem SH2 domain binds to a serine
2-phosphorylated CTD peptide in vitro, whereas its
N-terminal SH2 subdomain does not. CTD binding requires
a positively charged crevice in the C-terminal SH2
subdomain, which lacks the canonical phospho-binding
pocket of SH2 domains. The tandem SH2 domain is
apparently required for transcription elongation in vivo
as its deletion in cells is lethal in the presence of
6-azauracil. In general SH2 domains are involved in
signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 85
Score = 34.5 bits (80), Expect = 0.009
Identities = 18/80 (22%), Positives = 31/80 (38%), Gaps = 15/80 (18%)
Query: 65 TKNDAVDMLVKAGPGSFLVRPSDNSPG--------DYSLFFHIN----NQIQRFRIEKKA 112
A L G ++RPS ++ HI+ N+ F + K+
Sbjct: 9 NYKQAEAYLKSKDVGEVVIRPSSKGVDHLTVTWKVADGVYQHIDIEELNKENPFSLGKE- 67
Query: 113 VRYLMGGRTFECLDAVINRY 132
++GG +E LD +I R+
Sbjct: 68 --LIIGGEEYEDLDEIIARF 85
>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 = 35.0 bits (81), Expect = 0.012
Identities = 23/88 (26%), Positives = 42/88 (47%), Gaps = 2/88 (2%)
Query: 55 TVFDWFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA-- 112
+ F WF E ++ A + L G++LVR Y+L N ++ +IE+++
Sbjct: 3 SEFLWFVGEMERDTAENRLENRPDGTYLVRVRPQGETQYALSIKYNGDVKHMKIEQRSDG 62
Query: 113 VRYLMGGRTFECLDAVINRYRKEQIVEG 140
+ YL R F+ L ++N Y + + E
Sbjct: 63 LYYLSESRHFKSLVELVNYYERNSLGEN 90
Score = 26.5 bits (59), Expect = 8.2
Identities = 16/62 (25%), Positives = 30/62 (48%), Gaps = 2/62 (3%)
Query: 166 FLVRPSDNSPGDYSLFFHINNQIQRFRIEKKA--VRYLMGGRTFECLDAVINRYRKEQIV 223
+LVR Y+L N ++ +IE+++ + YL R F+ L ++N Y + +
Sbjct: 29 YLVRVRPQGETQYALSIKYNGDVKHMKIEQRSDGLYYLSESRHFKSLVELVNYYERNSLG 88
Query: 224 EG 225
E
Sbjct: 89 EN 90
>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 = 33.5 bits (77), Expect = 0.013
Identities = 13/26 (50%), Positives = 15/26 (57%), Gaps = 1/26 (3%)
Query: 2 PDTDELTFQKGDIFFVHNELGDGWLW 27
DEL+ Q GDI VH + DGW W
Sbjct: 11 NREDELSLQPGDIIEVHEKQDDGW-W 35
>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 = 34.6 bits (79), Expect = 0.014
Identities = 23/86 (26%), Positives = 39/86 (45%), Gaps = 9/86 (10%)
Query: 58 DWFHPECTKNDAVDMLVKAGP--GSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRY 115
+WF ++ DA L+ G GSF++R S+ + G YSL + ++ +R
Sbjct: 4 EWFFKGISRKDAERQLLAPGNMLGSFMIRDSETTKGSYSLSVRDYDPQHGDTVKHYKIRT 63
Query: 116 LMGG-------RTFECLDAVINRYRK 134
L G TF L +++ Y+K
Sbjct: 64 LDNGGFYISPRSTFSTLQELVDHYKK 89
Score = 28.0 bits (62), Expect = 3.1
Identities = 18/80 (22%), Positives = 36/80 (45%), Gaps = 7/80 (8%)
Query: 147 VTRMSRQWKIATKGSCHKSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGG-- 204
++R + ++ G+ SF++R S+ + G YSL + ++ +R L G
Sbjct: 10 ISRKDAERQLLAPGNMLGSFMIRDSETTKGSYSLSVRDYDPQHGDTVKHYKIRTLDNGGF 69
Query: 205 -----RTFECLDAVINRYRK 219
TF L +++ Y+K
Sbjct: 70 YISPRSTFSTLQELVDHYKK 89
>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 = 33.1 bits (76), Expect = 0.014
Identities = 12/21 (57%), Positives = 16/21 (76%)
Query: 5 DELTFQKGDIFFVHNELGDGW 25
DEL+FQ+GDI +V + DGW
Sbjct: 14 DELSFQEGDIIYVTKKNDDGW 34
>gnl|CDD|198275 cd10412, SH2_SH2B3, Src homology 2 (SH2) domain found in SH2B
adapter proteins (SH2B1, SH2B2, SH2B3). SH2B3 (Lnk),
like other members of the SH2B adapter protein family,
contains a pleckstrin homology domain, at least one
dimerization domain, and a C-terminal SH2 domain which
binds to phosphorylated tyrosines in a variety of
tyrosine kinases. SH2B3 negatively regulates
lymphopoiesis and early hematopoiesis. The
lnk-deficiency results in enhanced production of B
cells, and expansion as well as enhanced function of
hematopoietic stem cells (HSCs), demonstrating negative
regulatory functions of Sh2b3/Lnk in cytokine signaling.
Sh2b3/Lnk also functions in responses controlled by cell
adhesion and in crosstalk between integrin- and
cytokine-mediated signaling. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 97
Score = 34.5 bits (79), Expect = 0.014
Identities = 17/55 (30%), Positives = 28/55 (50%), Gaps = 3/55 (5%)
Query: 57 FDWFHPECTKNDAVDMLVKAGP---GSFLVRPSDNSPGDYSLFFHINNQIQRFRI 108
+ WFH ++ A ++ GP G FLVR S+ G+Y L F+ + + R+
Sbjct: 8 YPWFHGPISRVKAAQLVQLQGPDAHGVFLVRQSETRRGEYVLTFNFQGRAKHLRL 62
Score = 28.7 bits (64), Expect = 1.7
Identities = 14/49 (28%), Positives = 25/49 (51%), Gaps = 1/49 (2%)
Query: 146 PVTRMSRQWKIATKG-SCHKSFLVRPSDNSPGDYSLFFHINNQIQRFRI 193
P++R+ + +G H FLVR S+ G+Y L F+ + + R+
Sbjct: 14 PISRVKAAQLVQLQGPDAHGVFLVRQSETRRGEYVLTFNFQGRAKHLRL 62
>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 = 34.5 bits (79), Expect = 0.016
Identities = 21/80 (26%), Positives = 39/80 (48%), Gaps = 4/80 (5%)
Query: 59 WFHPECTKNDAVDMLVKAG--PGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEK--KAVR 114
WF + DA L+ + G+FL+R S++ G++SL ++ +RI + +
Sbjct: 5 WFFGAIKRADAEKQLLYSENQTGAFLIRESESQKGEFSLSVLDGGVVKHYRIRRLDEGGF 64
Query: 115 YLMGGRTFECLDAVINRYRK 134
+L +TF L+ +N Y
Sbjct: 65 FLTRRKTFSTLNEFVNYYTT 84
Score = 29.1 bits (65), Expect = 1.2
Identities = 16/76 (21%), Positives = 36/76 (47%), Gaps = 2/76 (2%)
Query: 146 PVTRMSRQWKIATKGSCHKSFLVRPSDNSPGDYSLFFHINNQIQRFRIEK--KAVRYLMG 203
+ R + ++ + +FL+R S++ G++SL ++ +RI + + +L
Sbjct: 9 AIKRADAEKQLLYSENQTGAFLIRESESQKGEFSLSVLDGGVVKHYRIRRLDEGGFFLTR 68
Query: 204 GRTFECLDAVINRYRK 219
+TF L+ +N Y
Sbjct: 69 RKTFSTLNEFVNYYTT 84
>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 = 34.5 bits (79), Expect = 0.017
Identities = 16/39 (41%), Positives = 23/39 (58%), Gaps = 2/39 (5%)
Query: 59 WFHPECTKNDAVDMLVKAG--PGSFLVRPSDNSPGDYSL 95
WF ++NDA L+ G GSFL+R S+ + G +SL
Sbjct: 5 WFFKNLSRNDAERQLLAPGNTHGSFLIRESETTAGSFSL 43
Score = 28.3 bits (63), Expect = 2.5
Identities = 10/21 (47%), Positives = 15/21 (71%)
Query: 160 GSCHKSFLVRPSDNSPGDYSL 180
G+ H SFL+R S+ + G +SL
Sbjct: 23 GNTHGSFLIRESETTAGSFSL 43
>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 = 34.4 bits (79), Expect = 0.017
Identities = 18/77 (23%), Positives = 38/77 (49%), Gaps = 2/77 (2%)
Query: 147 VTRMSRQWKIATKGSCHKSFLVRPSDNSPGDYSLFFHINNQIQRFRIEK--KAVRYLMGG 204
+ R+ + K+ + H +FL+R S++ DYSL + ++ +RI + + ++
Sbjct: 10 IKRIEAEKKLLLPENEHGAFLIRDSESRHNDYSLSVRDGDTVKHYRIRQLDEGGFFIARR 69
Query: 205 RTFECLDAVINRYRKEQ 221
TF L ++ Y K+
Sbjct: 70 TTFRTLQELVEHYSKDS 86
Score = 32.9 bits (75), Expect = 0.047
Identities = 16/60 (26%), Positives = 31/60 (51%), Gaps = 2/60 (3%)
Query: 79 GSFLVRPSDNSPGDYSLFFHINNQIQRFRIEK--KAVRYLMGGRTFECLDAVINRYRKEQ 136
G+FL+R S++ DYSL + ++ +RI + + ++ TF L ++ Y K+
Sbjct: 27 GAFLIRDSESRHNDYSLSVRDGDTVKHYRIRQLDEGGFFIARRTTFRTLQELVEHYSKDS 86
>gnl|CDD|198277 cd10414, SH2_Grb14, Src homology 2 (SH2) domain found in the growth
factor receptor bound, subclass 14 (Grb14) proteins.
The Grb family binds to the epidermal growth factor
receptor (EGFR, erbB1) via their SH2 domains. Grb14 is
part of the Grb7 family of proteins which also includes
Grb7, and Grb14. They are composed of an N-terminal
Proline-rich domain, a Ras Associating-like (RA) domain,
a Pleckstrin Homology (PH) domain, a phosphotyrosine
interaction region (PIR, BPS) and a C-terminal SH2
domain. The SH2 domains of Grb7, Grb10 and Grb14
preferentially bind to a different RTK. Grb14 binds to
Fibroblast Growth Factor Receptor (FGFR) and weakly to
the erbB2 receptor. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 108
Score = 34.5 bits (79), Expect = 0.017
Identities = 16/52 (30%), Positives = 31/52 (59%), Gaps = 2/52 (3%)
Query: 59 WFHPECTKNDAVDMLVKAGP--GSFLVRPSDNSPGDYSLFFHINNQIQRFRI 108
WFH + ++++A ++++ G G FLVR S ++P + L +I+ F+I
Sbjct: 7 WFHHKISRDEAQRLIIQQGLVDGVFLVRDSQSNPRTFVLSMSHGQKIKHFQI 58
>gnl|CDD|198253 cd10390, SH2_SHD, Src homology 2 domain found in SH2
domain-containing adapter proteins D (SHD). The
expression of SHD is restricted to the brain. SHD may
be a physiological substrate of c-Abl and may function
as an adapter protein in the central nervous system. It
is also thought to be involved in apoptotic regulation.
SHD contains five YXXP motifs, a substrate sequence
preferred by Abl tyrosine kinases, in addition to a
poly-proline rich region and a C-terminal SH2 domain.
In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 98
Score = 34.3 bits (78), Expect = 0.017
Identities = 16/37 (43%), Positives = 22/37 (59%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSL 95
WFH ++ DA ++L GS+LVR S+ P D SL
Sbjct: 3 WFHGPLSRADAENLLSLCKEGSYLVRLSETRPQDCSL 39
>gnl|CDD|212799 cd11865, SH3_Nbp2-like, Src Homology 3 domain of Saccharomyces
cerevisiae Nap1-binding protein 2 and similar fungal
proteins. This subfamily includes Saccharomyces
cerevisiae Nbp2 (Nucleosome assembly protein 1
(Nap1)-binding protein 2), Schizosaccharomyces pombe
Skb5, and similar proteins. Nbp2 interacts with Nap1,
which is essential for maintaining proper nucleosome
structures in transcription and replication. It is also
the binding partner of the yeast type II protein
phosphatase Ptc1p and serves as a scaffolding protein
that brings seven kinases in close contact to Ptc1p.
Nbp2 plays a role many cell processes including
organelle inheritance, mating hormone response, cell
wall stress, mitotic cell growth at elevated
temperatures, and high osmolarity. Skb5 interacts with
the p21-activated kinase (PAK) homolog Shk1, which is
critical for fission yeast cell viability. Skb5
activates Shk1 and plays a role in regulating cell
morphology and growth under hypertonic conditions. Nbp2
and Skb5 contain an SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 55
Score = 32.9 bits (75), Expect = 0.022
Identities = 13/41 (31%), Positives = 21/41 (51%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 45
+EL F +G I F+ + G GWL G+ G++ + V
Sbjct: 14 NELGFAEGQILFILYKHGQGWLIAEDESGGKTGLVPEEFVS 54
>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 = 32.7 bits (74), Expect = 0.025
Identities = 15/41 (36%), Positives = 22/41 (53%), Gaps = 4/41 (9%)
Query: 3 DTDELTFQKGDIFFV----HNELGDGWLWVTAHRTGEQGMI 39
+ DEL GD FV +E +GW+ +HRTG +G +
Sbjct: 13 NIDELMLSPGDYIFVDPTQQSEASEGWVIGISHRTGCRGFL 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 = 32.3 bits (74), Expect = 0.027
Identities = 12/25 (48%), Positives = 15/25 (60%), Gaps = 1/25 (4%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLW 27
+ DEL+F KGDI V + GW W
Sbjct: 12 NEDELSFDKGDIITVTQVVEGGW-W 35
>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 = 33.5 bits (77), Expect = 0.030
Identities = 19/65 (29%), Positives = 28/65 (43%)
Query: 57 FDWFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYL 116
W+ + DA +L GSFLVR S + +SL F + RIE+ +
Sbjct: 10 CGWYWGPMSWEDAEKVLSNKPDGSFLVRDSSDDRYIFSLSFRSQGSVHHTRIEQYQGTFS 69
Query: 117 MGGRT 121
+G R
Sbjct: 70 LGSRN 74
>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 = 32.7 bits (75), Expect = 0.031
Identities = 15/39 (38%), Positives = 19/39 (48%), Gaps = 4/39 (10%)
Query: 4 TDELTFQKGDIFFVH-NELG---DGWLWVTAHRTGEQGM 38
DEL GD +V EL DGW+ T+ TG G+
Sbjct: 13 EDELELVPGDYIYVSPEELDSSSDGWVEGTSWLTGCSGL 51
>gnl|CDD|198273 cd10410, SH2_SH2B1, Src homology 2 (SH2) domain found in SH2B
adapter proteins (SH2B1, SH2B2, SH2B3). SH2B1 (SH2-B,
PSM), like other members of the SH2B adapter protein
family, contains a pleckstrin homology domain, at least
one dimerization domain, and a C-terminal SH2 domain
which binds to phosphorylated tyrosines in a variety of
tyrosine kinases. SH2B1 and SH2B2 function in
signaling pathways found downstream of growth hormone
receptor and receptor tyrosine kinases, including the
insulin, insulin-like growth factor-I (IGF-I),
platelet-derived growth factor (PDGF), nerve growth
factor, hepatocyte growth factor, and fibroblast growth
factor receptors. SH2B2beta, a new isoform of SH2B2, is
an endogenous inhibitor of SH2B1 and/or SH2B2
(SH2B2alpha), negatively regulating insulin signaling
and/or JAK2-mediated cellular responses. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 97
Score = 33.5 bits (76), Expect = 0.032
Identities = 18/59 (30%), Positives = 32/59 (54%), Gaps = 3/59 (5%)
Query: 53 PNTVFDWFHPECTKNDAVDMLVKAGPGS---FLVRPSDNSPGDYSLFFHINNQIQRFRI 108
P + + WFH ++ A ++++ G GS FLVR S+ G+Y L F+ + + R+
Sbjct: 4 PLSGYPWFHGMLSRLKAAQLVLEGGTGSHGVFLVRQSETRRGEYVLTFNFQGKAKHLRL 62
>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 = 0.037
Identities = 16/37 (43%), Positives = 21/37 (56%), Gaps = 1/37 (2%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
++DEL FQKGDI + N + D W A G +G I
Sbjct: 12 ESDELPFQKGDILKILN-MEDDQNWYKAELQGREGYI 47
>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 = 33.8 bits (78), Expect = 0.039
Identities = 21/56 (37%), Positives = 29/56 (51%), Gaps = 2/56 (3%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVR 114
W+H + A + LV+ G FLVR S +SPGDY L Q F+I + +R
Sbjct: 8 WYHGRIPRQVA-ESLVQR-EGDFLVRDSLSSPGDYVLTCRWKGQPLHFKINRVVLR 61
Score = 31.5 bits (72), Expect = 0.27
Identities = 25/83 (30%), Positives = 37/83 (44%), Gaps = 13/83 (15%)
Query: 166 FLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVR---------YLMGGRTFECLDAVINR 216
FLVR S +SPGDY L Q F+I + +R Y F+ + A+++
Sbjct: 28 FLVRDSLSSPGDYVLTCRWKGQPLHFKINRVVLRPSEAYTRVQYQFEDEQFDSIPALVHF 87
Query: 217 Y--RKEQIVE--GHTLGFPVTRT 235
Y + I + G + PV RT
Sbjct: 88 YVGNRRPISQASGAIISRPVNRT 110
>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 = 33.5 bits (77), Expect = 0.041
Identities = 23/103 (22%), Positives = 43/103 (41%), Gaps = 18/103 (17%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMG 118
W+ + ++ + + + G+FLVR + GDY+L + +I +
Sbjct: 9 WYWGDISREEVNEKMRDTPDGTFLVRDASTMKGDYTLTLRKGGNNKLIKI------FHRD 62
Query: 119 GR-------TFECLDAVINRYRKEQIVEGHT-----LGFPVTR 149
G+ TF + +IN YR + E + L +PV+R
Sbjct: 63 GKYGFSDPLTFNSVVELINYYRNNSLAEYNRKLDVKLLYPVSR 105
Score = 30.8 bits (70), Expect = 0.38
Identities = 21/85 (24%), Positives = 35/85 (41%), Gaps = 18/85 (21%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGR-------TFECLDAVINRY 217
+FLVR + GDY+L + +I + G+ TF + +IN Y
Sbjct: 30 TFLVRDASTMKGDYTLTLRKGGNNKLIKI------FHRDGKYGFSDPLTFNSVVELINYY 83
Query: 218 RKEQIVEGHT-----LGFPVTRTED 237
R + E + L +PV+R +
Sbjct: 84 RNNSLAEYNRKLDVKLLYPVSRFQQ 108
>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 = 32.2 bits (73), Expect = 0.042
Identities = 12/21 (57%), Positives = 15/21 (71%)
Query: 6 ELTFQKGDIFFVHNELGDGWL 26
ELT QKGDI ++H E+ WL
Sbjct: 16 ELTLQKGDIVYIHKEVDKNWL 36
>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 = 33.2 bits (76), Expect = 0.054
Identities = 25/88 (28%), Positives = 44/88 (50%), Gaps = 7/88 (7%)
Query: 59 WFHPECTKNDAVDMLVKAG--PGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYL 116
WFH ++++A ++ + G G FLVR S ++PG + L +I+ ++I +
Sbjct: 7 WFHGGISRDEAARLIRQQGLVDGVFLVRESQSNPGAFVLSLKHGQKIKHYQI----IPIE 62
Query: 117 MGGRTFECLD-AVINRYRKEQIVEGHTL 143
G+ + LD V Y Q+VE + L
Sbjct: 63 DEGQWYFTLDDGVTKFYDLLQLVEFYQL 90
Score = 27.0 bits (60), Expect = 7.0
Identities = 23/84 (27%), Positives = 37/84 (44%), Gaps = 8/84 (9%)
Query: 149 RMSR---QWKIATKGSCHKSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRYLMGGR 205
+SR I +G FLVR S ++PG + L +I+ ++I + G+
Sbjct: 11 GISRDEAARLIRQQGLVDGVFLVRESQSNPGAFVLSLKHGQKIKHYQI----IPIEDEGQ 66
Query: 206 TFECLD-AVINRYRKEQIVEGHTL 228
+ LD V Y Q+VE + L
Sbjct: 67 WYFTLDDGVTKFYDLLQLVEFYQL 90
>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 = 31.5 bits (72), Expect = 0.055
Identities = 15/33 (45%), Positives = 20/33 (60%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 37
DEL ++GDI +V + DGW T+ RTG G
Sbjct: 14 DELELREGDIVYVMEKCDDGWFVGTSERTGLFG 46
>gnl|CDD|198219 cd10356, SH2_ShkA_ShkC, Src homology 2 (SH2) domain found in SH2
domain-bearing protein kinases A and C (ShkA and ShkC).
SH2-bearing genes cloned from Dictyostelium include two
transcription factors, STATa and STATc, and a signaling
factor, SHK1 (shkA). A database search of the
Dictyostelium discoideum genome revealed two additional
putative STAT sequences, dd-STATb and dd-STATd, and four
additional putative SHK genes, dd-SHK2 (shkB), dd-SHK3
(shkC), dd-SHK4 (shkD), and dd-SHK5 (shkE). This model
contains members of shkA and shkC. All of the SHK
members are most closely related to the protein kinases
found in plants. However these kinases in plants are
not conjugated to any SH2 or SH2-like sequences.
Alignment data indicates that the SHK SH2 domains carry
some features of the STAT SH2 domains in Dictyostelium.
When STATc's linker domain was used for a BLAST search,
the sequence between the protein kinase domain and the
SH2 domain (the linker) of SHK was recovered, suggesting
a close relationship among these molecules within this
region. SHK's linker domain is predicted to contain an
alpha-helix which is indeed homologous to that of STAT.
Based on the phylogenetic alignment, SH2 domains can be
grouped into two categories, STAT-type and Src-type. SHK
family members are in between, but are closer to the
STAT-type which indicates a close relationship between
SHK and STAT families in their SH2 domains and further
supports the notion that SHKs linker-SH2 domain evolved
from STAT or STATL (STAT-like Linker-SH2) domain found
in plants. In SHK, STAT, and SPT6, the linker-SH2
domains all reside exclusively in the C-terminal
regions. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 113
Score = 33.0 bits (75), Expect = 0.059
Identities = 17/58 (29%), Positives = 30/58 (51%), Gaps = 1/58 (1%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINN-QIQRFRIEKKAVRY 115
WFH + + +++ + L G+FLVR S + PG Y++ N I RI + ++
Sbjct: 12 WFHGDISTSESENRLNGKPEGTFLVRFSTSEPGAYTISKVSKNGGISHQRIHRPGGKF 69
>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 = 31.5 bits (71), Expect = 0.060
Identities = 17/41 (41%), Positives = 24/41 (58%), Gaps = 1/41 (2%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 45
DEL+F++GDI V NE D W A G+ G I ++ +E
Sbjct: 15 DELSFKRGDILKVLNEECDQ-NWYKAELNGKDGFIPKNYIE 54
>gnl|CDD|198175 cd09919, SH2_STAT_family, Src homology 2 (SH2) domain found in
signal transducer and activator of transcription (STAT)
family. STAT proteins mediate the signaling of
cytokines and a number of growth factors from the
receptors of these extracellular signaling molecules to
the cell nucleus. STATs are specifically phosphorylated
by receptor-associated Janus kinases, receptor tyrosine
kinases, or cytoplasmic tyrosine kinases. The
phosphorylated STAT molecules dimerize by reciprocal
binding of their SH2 domains to the phosphotyrosine
residues. These dimeric STATs translocate into the
nucleus, bind to specific DNA sequences, and regulate
the transcription of their target genes. However there
are a number of unphosphorylated STATs that travel
between the cytoplasm and nucleus and some STATs that
exist as dimers in unstimulated cells that can exert
biological functions independent of being activated by a
receptor. There are seven mammalian STAT family members
which have been identified: STAT1, STAT2, STAT3, STAT4,
STAT5 (STAT5A and STAT5B), and STAT6. There are 6
conserved domains in STAT: N-terminal domain (NTD),
coiled-coil domain (CCD), DNA-binding domain (DBD),
alpha-helical linker domain (LD), SH2 domain, and
transactivation domain (TAD). NTD is involved in
dimerization of unphosphorylated STATs monomers and for
the tetramerization between STAT1, STAT3, STAT4 and
STAT5 on promoters with two or more tandem STAT binding
sites. It also plays a role in promoting interactions
with transcriptional co-activators such as CREB binding
protein (CBP)/p300, as well as being important for
nuclear import and deactivation of STATs involving
tyrosine de-phosphorylation. The CCD interacts with
other proteins, such as IFN regulatory protein 9
(IRF-9/p48) with STAT1 and c-JUN with STAT3 and is also
thought to participate in the negative regulation of
these proteins. Distinct genes are bound to STATs via
their DBD domain. This domain is also involved in
nuclear translocation of activated STAT1 and STAT3
phosphorylated dimers upon cytokine stimulation. LD
links the DNA-binding and SH2 domains and is important
for the transcriptional activation of STAT1 in response
to IFN-gamma. It also plays a role in protein-protein
interactions and has also been implicated in the
constitutive nucleocytoplasmic shuttling of
unphosphorylated STATs in resting cells. The SH2 domain
is necessary for receptor association and tyrosine
phosphodimer formation. Residues within this domain may
be particularly important for some cellular functions
mediated by the STATs as well as residues adjacent to
this domain. The TAD interacts with several proteins,
namely minichromosome maintenance complex component 5
(MCM5), breast cancer 1 (BRCA1) and CBP/p300. TAD also
contains a modulatory phosphorylation site that
regulates STAT activity and is necessary for maximal
transcription of a number of target genes. The conserved
tyrosine residue present in the C-terminus is crucial
for dimerization via interaction with the SH2 domain
upon the interaction of the ligand with the receptor.
STAT activation by tyrosine phosphorylation also
determines nuclear import and retention, DNA binding to
specific DNA elements in the promoters of responsive
genes, and transcriptional activation of STAT dimers. In
addition to the SH2 domain there is a coiled-coil
domain, a DNA binding domain, and a transactivation
domain in the STAT proteins. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 115
Score = 32.9 bits (76), Expect = 0.061
Identities = 13/46 (28%), Positives = 26/46 (56%)
Query: 64 CTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIE 109
+K +A D+L K PG+FL+R SD+ G ++ + + + ++
Sbjct: 26 ISKEEAEDLLKKKPPGTFLLRFSDSELGGITIAWVNEDPDGQSQVI 71
>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 = 31.3 bits (72), Expect = 0.066
Identities = 14/44 (31%), Positives = 24/44 (54%), Gaps = 2/44 (4%)
Query: 2 PDTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 45
D +EL+ +KGD+ V ++ +GW R G +G++ VE
Sbjct: 11 TDPNELSLKKGDVVKVLDKDDNGWWEGE--RGGRRGLVPSSYVE 52
>gnl|CDD|198220 cd10357, SH2_ShkD_ShkE, Src homology 2 (SH2) domain found in SH2
domain-bearing protein kinases D and E (ShkD and ShkE).
SH2-bearing genes cloned from Dictyostelium include
two transcription factors, STATa and STATc, and a
signaling factor, SHK1 (shkA). A database search of the
Dictyostelium discoideum genome revealed two additional
putative STAT sequences, dd-STATb and dd-STATd, and
four additional putative SHK genes, dd-SHK2 (shkB),
dd-SHK3 (shkC), dd-SHK4 (shkD), and dd-SHK5 (shkE).
This model contains members of shkD and shkE. All of
the SHK members are most closely related to the protein
kinases found in plants. However these kinases in
plants are not conjugated to any SH2 or SH2-like
sequences. Alignment data indicates that the SHK SH2
domains carry some features of the STAT SH2 domains in
Dictyostelium. When STATc's linker domain was used for
a BLAST search, the sequence between the protein kinase
domain and the SH2 domain (the linker) of SHK was
recovered, suggesting a close relationship among these
molecules within this region. SHK's linker domain is
predicted to contain an alpha-helix which is indeed
homologous to that of STAT. Based on the phylogenetic
alignment, SH2 domains can be grouped into two
categories, STAT-type and Src-type. SHK family members
are in between, but are closer to the STAT-type which
indicates a close relationship between SHK and STAT
families in their SH2 domains and further supports the
notion that SHKs linker-SH2 domain evolved from STAT or
STATL (STAT-like Linker-SH2) domain found in plants. In
SHK, STAT, and SPT6, the linker-SH2 domains all reside
exclusively in the C-terminal regions. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 87
Score = 32.1 bits (73), Expect = 0.068
Identities = 11/32 (34%), Positives = 18/32 (56%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSP 90
WFH + ++++A L G+FL+R S P
Sbjct: 12 WFHGDISRDEAEKRLRGRPEGTFLIRLSSTDP 43
>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 = 0.072
Identities = 18/43 (41%), Positives = 25/43 (58%), Gaps = 2/43 (4%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 45
DTDEL+F +GDI + E GW W T G++G+ + VE
Sbjct: 12 DTDELSFNEGDIIEILKEDPSGW-W-TGRLRGKEGLFPGNYVE 52
>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 = 31.6 bits (72), Expect = 0.078
Identities = 14/32 (43%), Positives = 19/32 (59%), Gaps = 2/32 (6%)
Query: 7 LTFQKGDIFFVHNELGDGWLWVTAHRTGEQGM 38
L+FQKGDI V ++ W W A+R GE+
Sbjct: 23 LSFQKGDILHVISQEDPNW-W-QAYREGEEDN 52
>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 = 31.1 bits (70), Expect = 0.091
Identities = 13/34 (38%), Positives = 19/34 (55%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGM 38
DEL +KG++F V DGW T+ T + G+
Sbjct: 14 DELELRKGEMFLVFERCQDGWFKGTSMHTSKIGV 47
>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 = 30.8 bits (70), Expect = 0.096
Identities = 15/37 (40%), Positives = 23/37 (62%), Gaps = 2/37 (5%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
+ 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 = 30.8 bits (70), Expect = 0.10
Identities = 14/33 (42%), Positives = 20/33 (60%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 37
DELT ++GD+ V ++ DGW R GE+G
Sbjct: 14 DELTLEEGDVVNVLRKMPDGWYEGERLRDGERG 46
>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 = 30.8 bits (70), Expect = 0.11
Identities = 14/35 (40%), Positives = 22/35 (62%)
Query: 4 TDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGM 38
DEL +KG+++ V + DGW T+ RTG+ G+
Sbjct: 13 PDELELRKGEMYTVTEKCQDGWFKGTSLRTGQSGV 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 = 30.9 bits (70), Expect = 0.11
Identities = 14/37 (37%), Positives = 20/37 (54%), Gaps = 2/37 (5%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
D +EL+F+KG+I V + G W W GE G+
Sbjct: 14 DPNELSFEKGEILEVSDTSGK-W-WQARKSNGETGIC 48
>gnl|CDD|198199 cd09946, SH2_HSH2_like, Src homology 2 domain found in
hematopoietic SH2 (HSH2) protein. HSH2 is thought to
function as an adapter protein involved in tyrosine
kinase signaling. It may also be involved in regulating
cytokine signaling and cytoskeletal reorganization in
hematopoietic cells. HSH2 contains several putative
protein-binding motifs, SH3-binding proline-rich
regions, and phosphotyrosine sites, but lacks enzymatic
motifs. HSH2 was found to interact with
cytokine-regulated tyrosine kinase c-FES and an
activated Cdc42-associated tyrosine kinase ACK1. HSH2
binds c-FES through both its C-terminal region and its
N-terminal region including the SH2 domain and binds
ACK1 via its N-terminal proline-rich region. Both
kinases bound and tyrosine-phosphorylated HSH2 in
mammalian cells. In general SH2 domains are involved in
signal transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 102
Score = 31.8 bits (72), Expect = 0.12
Identities = 17/54 (31%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 56 VFDWFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIE 109
V +WFH ++ A +ML GSFL+R S + G Y+L + + + F ++
Sbjct: 6 VPEWFHGAISREAAENMLESQPLGSFLIRVSHSHVG-YTLSYKAQSSCRHFMVK 58
>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 = 30.7 bits (69), Expect = 0.12
Identities = 14/35 (40%), Positives = 21/35 (60%)
Query: 4 TDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGM 38
DEL +KG+++ V + DGW T+ RTG G+
Sbjct: 14 NDELELRKGEMYRVIEKCQDGWFKGTSLRTGVSGV 48
>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 = 30.4 bits (69), Expect = 0.14
Identities = 15/37 (40%), Positives = 22/37 (59%), Gaps = 5/37 (13%)
Query: 5 DELTFQKGDIFFV---HNELGDGWLWVTAHRTGEQGM 38
DEL F++GDI V + +GW W+ + R G QG+
Sbjct: 14 DELAFRRGDILTVLEQNTAGLEGW-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 = 30.2 bits (68), Expect = 0.17
Identities = 13/35 (37%), Positives = 18/35 (51%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 37
DEL+ Q+ D+ V DGW + R GE+G
Sbjct: 12 QPDELSLQQADVVLVLQTESDGWYYGERLRDGERG 46
>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 = 30.1 bits (68), Expect = 0.19
Identities = 11/24 (45%), Positives = 16/24 (66%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWL 26
D+ +L+F+KGDI V + D WL
Sbjct: 12 DSGQLSFRKGDILRVIARVDDDWL 35
>gnl|CDD|199830 cd10349, SH2_SH2D2A_SH2D7, Src homology 2 domain found in the SH2
domain containing protein 2A and 7 (SH2D2A and SH2D7).
SH2D2A and SH7 both contain a single SH2 domain. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 77
Score = 30.6 bits (69), Expect = 0.22
Identities = 15/64 (23%), Positives = 31/64 (48%), Gaps = 2/64 (3%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEK-KAVRYLM 117
WFH T+ +A +L G +LVR S+++ + L + + F + + + R+++
Sbjct: 2 WFHGFITRREAERLLEPKPQGCYLVRFSESAVT-FVLSYRSRTCCRHFLLAQLRDGRHVV 60
Query: 118 GGRT 121
G
Sbjct: 61 LGED 64
>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 = 30.0 bits (68), Expect = 0.23
Identities = 12/41 (29%), Positives = 25/41 (60%), Gaps = 1/41 (2%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 45
+E++F +GDI ++ +GW W+ + G++G+ + VE
Sbjct: 14 NEISFVEGDIITQIEQIDEGW-WLGVNAKGQKGLFPANYVE 53
>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 = 30.2 bits (68), Expect = 0.23
Identities = 14/39 (35%), Positives = 19/39 (48%), Gaps = 1/39 (2%)
Query: 2 PDTDELTFQKGDIF-FVHNELGDGWLWVTAHRTGEQGMI 39
P EL F KGDI V GW + +GE+G++
Sbjct: 13 PKPGELAFHKGDIVTIVETCERKGWYRARHNTSGEEGLV 51
>gnl|CDD|198229 cd10366, SH2_Src_Yes, Src homology 2 (SH2) domain found in Yes.
Yes is a member of the Src non-receptor type tyrosine
kinase family of proteins. Yes is the cellular homolog
of the Yamaguchi sarcoma virus oncogene. In humans it is
encoded by the YES1 gene which maps to chromosome 18 and
is in close proximity to thymidylate synthase. A
corresponding Yes pseudogene has been found on
chromosome 22. YES1 has been shown to interact with
Janus kinase 2, CTNND1,RPL10, and Occludin. Yes1 has a
unique N-terminal domain, an SH3 domain, an SH2 domain,
a kinase domain and a regulatory tail, as do the other
members of the family. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 30.8 bits (69), Expect = 0.27
Identities = 21/84 (25%), Positives = 39/84 (46%), Gaps = 9/84 (10%)
Query: 58 DWFHPECTKNDAVDMLVKAGP--GSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRY 115
+W+ + + DA +L+ G G FLVR S+ + G YSL ++++ ++ +R
Sbjct: 4 EWYFGKMGRKDAERLLLNPGNQRGIFLVRESETTKGAYSLSIRDWDEVRGDNVKHYKIRK 63
Query: 116 LMGG-------RTFECLDAVINRY 132
L G F+ L ++ Y
Sbjct: 64 LDNGGYYITTRAQFDTLQKLVKHY 87
>gnl|CDD|213330 cd05128, RasGAP_GAP1_like, Ras-GTPase Activating Domain of GAP1 and
similar proteins. The GAP1 family of Ras
GTPase-activating proteins includes GAP1(m) (or RASA2),
GAP1_IP4BP (or RASA3), Ca2+ -promoted Ras inactivator
(CAPRI, or RASAL4), and Ras GTPase activating-like
proteins (RASAL) or RASAL1. The members are
characterized by a conserved domain structure comprising
N-terminal tandem C2 domains, a highly conserved central
RasGAP domain, and a C-terminal pleckstrin homology
domain that is associated with a Bruton's tyrosine
kinase motif. While this domain structure is conserved,
a small change in the function of each individual domain
and the interaction between domains has a marked effect
on the regulation of each protein.
Length = 269
Score = 32.2 bits (74), Expect = 0.31
Identities = 17/44 (38%), Positives = 24/44 (54%), Gaps = 6/44 (13%)
Query: 270 YSPLQQLLLES-DLAVVKA-----LADVCHGDRNRLASSLLRIF 307
Y PL LLLES D+ A L ++ D++ +A L+RIF
Sbjct: 3 YEPLLNLLLESLDVPPFTASAVYLLEELVKVDKDDVARPLVRIF 46
>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 = 29.4 bits (66), Expect = 0.37
Identities = 15/32 (46%), Positives = 19/32 (59%), Gaps = 3/32 (9%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQ 36
DELT +G+ V ++L DGW WV R GE
Sbjct: 14 DELTLLEGEAIEVIHKLLDGW-WVV--RKGEV 42
>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 = 29.2 bits (66), Expect = 0.46
Identities = 12/36 (33%), Positives = 22/36 (61%), Gaps = 2/36 (5%)
Query: 4 TDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
DEL+F++GD+ ++ ++ W W A G+ G+I
Sbjct: 13 PDELSFEEGDLLYISDKSDPNW-W-KATCGGKTGLI 46
>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 = 28.9 bits (65), Expect = 0.48
Identities = 11/35 (31%), Positives = 20/35 (57%), Gaps = 2/35 (5%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
EL+F+KGD ++ ++ D W W G+ G++
Sbjct: 14 RELSFKKGDSLTLYRQVSDDW-WRGQL-NGQDGLV 46
>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 = 0.50
Identities = 12/29 (41%), Positives = 17/29 (58%)
Query: 6 ELTFQKGDIFFVHNELGDGWLWVTAHRTG 34
+LTFQ+GD+ V + GD W +TG
Sbjct: 15 DLTFQQGDVILVTKKDGDWWTGTVGDKTG 43
>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 = 29.1 bits (65), Expect = 0.58
Identities = 13/33 (39%), Positives = 17/33 (51%), Gaps = 3/33 (9%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 37
+EL+FQ GD F + GD W TA + G
Sbjct: 14 EELSFQAGDQFRIAERSGDWW---TALKLDRAG 43
>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 = 0.60
Identities = 7/21 (33%), Positives = 13/21 (61%)
Query: 6 ELTFQKGDIFFVHNELGDGWL 26
EL+ +KGDI ++ ++ W
Sbjct: 15 ELSLKKGDIIYIRRQIDKNWY 35
>gnl|CDD|213337 cd05135, RasGAP_RASAL, Ras-GTPase Activating Domain of RASAL1 and
similar proteins. Ras GTPase activating-like protein
(RASAL) or RASAL1 is a member of the GAP1 family, and a
Ca2+ sensor responding in-phase to repetitive Ca2+
signals by associating with the plasma membrane and
deactivating Ras. It contains a conserved domain
structure comprising N-terminal tandem C2 domains, a
highly conserved central RasGAP domain, and a C-terminal
pleckstrin-homology domain that is associated with a
Bruton's tyrosine kinase motif. RASAL, like Ca2+
-promoted Ras inactivator (CAPRI, or RASAL4), is a
cytosolic protein that undergoes a rapid translocation
to the plasma membrane in response to receptor-mediated
elevation in the concentration of intracellular free
Ca2+, a translocation that activates its ability to
function as a RasGAP. However, unlike RASAL4, RASAL
undergoes an oscillatory translocation to the plasma
membrane that occurs in synchrony with repetitive Ca2+
spikes.
Length = 287
Score = 31.3 bits (71), Expect = 0.60
Identities = 18/51 (35%), Positives = 27/51 (52%), Gaps = 9/51 (17%)
Query: 266 PSEEYSPLQQLLLES--------DLAVVKALADVCHGD-RNRLASSLLRIF 307
PS+ Y PL LL+ES D + L +V G+ R +A+ L++IF
Sbjct: 1 PSQYYQPLIDLLVESVQSPAEAEDSTPLAMLEEVTTGESRQDVATKLVKIF 51
>gnl|CDD|198205 cd10342, SH2_SAP1, Src homology 2 (SH2) domain found in
SLAM-associated protein (SAP)1. The X-linked
lymphoproliferative syndrome (XLP) gene encodes SAP
(also called SH2D1A/DSHP) a protein that consists of a 5
residue N-terminus, a single SH2 domain, and a short 25
residue C-terminal tail. XLP is characterized by an
extreme sensitivity to Epstein-Barr virus. Both T and
natural killer (NK) cell dysfunctions have been seen in
XLP patients. SAP binds the cytoplasmic tail of
Signaling lymphocytic activation molecule (SLAM), 2B4,
Ly-9, and CD84. SAP is believed to function as a
signaling inhibitor, by blocking or regulating binding
of other signaling proteins. SAP and the SAP-like
protein EAT-2 recognize the sequence motif TIpYXX[VI],
which is found in the cytoplasmic domains of a
restricted number of T, B, and NK cell surface receptors
and are proposed to be natural inhibitors or regulators
of the physiological role of a small family of receptors
on the surface of these cells. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 30.0 bits (67), Expect = 0.62
Identities = 14/58 (24%), Positives = 28/58 (48%), Gaps = 1/58 (1%)
Query: 59 WFHPECTKNDAVDMLVKAG-PGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRY 115
+H + ++ +L+ G GS+L+R S++ PG Y L + I +R+ +
Sbjct: 5 VYHGKISRETGEKLLLATGLDGSYLLRDSESVPGVYCLCVLYHGYIYTYRVSQTETGS 62
>gnl|CDD|198191 cd09938, SH2_N-SH2_Zap70_Syk_like, N-terminal Src homology 2 (SH2)
domain found in Zeta-chain-associated protein kinase 70
(ZAP-70) and Spleen tyrosine kinase (Syk) proteins.
ZAP-70 and Syk comprise a family of hematopoietic cell
specific protein tyrosine kinases (PTKs) that are
required for antigen and antibody receptor function.
ZAP-70 is expressed in T and natural killer (NK) cells
and Syk is expressed in B cells, mast cells,
polymorphonuclear leukocytes, platelets, macrophages,
and immature T cells. They are required for the proper
development of T and B cells, immune receptors, and
activating NK cells. They consist of two N-terminal Src
homology 2 (SH2) domains and a C-terminal kinase domain
separated from the SH2 domains by a linker or hinge
region. Phosphorylation of both tyrosine residues within
the Immunoreceptor Tyrosine-based Activation Motifs
(ITAM; consensus sequence Yxx[LI]x(7,8)Yxx[LI]) by the
Src-family PTKs is required for efficient interaction of
ZAP-70 and Syk with the receptor subunits and for
receptor function. ZAP-70 forms two phosphotyrosine
binding pockets, one of which is shared by both SH2
domains. In Syk the two SH2 domains do not form such a
phosphotyrosine-binding site. The SH2 domains here are
believed to function independently. In addition, the two
SH2 domains of Syk display flexibility in their relative
orientation, allowing Syk to accommodate a greater
variety of spacing sequences between the ITAM
phosphotyrosines and singly phosphorylated non-classical
ITAM ligands. This model contains the N-terminus SH2
domains of both Syk and Zap70. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 104
Score = 29.7 bits (67), Expect = 0.67
Identities = 17/54 (31%), Positives = 26/54 (48%), Gaps = 2/54 (3%)
Query: 59 WFHPECTKNDAVDMLVKAG--PGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEK 110
+F+ T+ +A + L AG G FL+R S S G Y L + + IE+
Sbjct: 3 FFYGSITREEAEEYLKLAGMSDGLFLLRQSLRSLGGYVLSVCHGRKFHHYTIER 56
>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 = 29.6 bits (66), Expect = 0.72
Identities = 21/86 (24%), Positives = 40/86 (46%), Gaps = 9/86 (10%)
Query: 58 DWFHPECTKNDAVDMLV--KAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEKKAVRY 115
+W+ + T+ ++ +L+ + G+FLVR S+ + G Y L + + ++ +R
Sbjct: 4 EWYFGKITRRESERLLLNAENPRGTFLVRESETTKGAYCLSVSDFDNAKGLNVKHYKIRK 63
Query: 116 LMGG------RT-FECLDAVINRYRK 134
L G RT F L ++ Y K
Sbjct: 64 LDSGGFYITSRTQFNSLQQLVAYYSK 89
>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 = 28.8 bits (64), Expect = 0.73
Identities = 14/35 (40%), Positives = 19/35 (54%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 37
+ DEL + GDI V + DGW T+ RT + G
Sbjct: 14 NDDELELRDGDIVDVMEKCDDGWFVGTSRRTKQFG 48
>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 = 0.75
Identities = 9/31 (29%), Positives = 15/31 (48%), Gaps = 1/31 (3%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAH-RTG 34
+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 = 28.9 bits (64), Expect = 0.75
Identities = 17/38 (44%), Positives = 23/38 (60%), Gaps = 5/38 (13%)
Query: 5 DELTFQKGDIFFV--HNELG-DGWLWVTAHRTGEQGMI 39
DEL+F+KGDI V + G DGW + H G QG++
Sbjct: 17 DELSFRKGDIMTVLERDTQGLDGWWLCSLH--GRQGIV 52
>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 = 28.4 bits (64), Expect = 0.75
Identities = 10/21 (47%), Positives = 14/21 (66%), Gaps = 1/21 (4%)
Query: 7 LTFQKGDIFFVHNELGDGWLW 27
L+F+ GDI +V N+ GW W
Sbjct: 16 LSFKAGDIIYVLNKDPSGW-W 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 = 28.5 bits (63), Expect = 0.77
Identities = 14/45 (31%), Positives = 23/45 (51%)
Query: 4 TDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVEDLD 48
T++L+F+KG+ F + N W + TG+ G I + V D
Sbjct: 14 TEDLSFKKGERFQIINNTEGDWWEARSIATGKNGYIPSNYVAPAD 58
>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 = 28.5 bits (64), Expect = 0.80
Identities = 8/26 (30%), Positives = 12/26 (46%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWV 28
D +L+F+ GD V + W W
Sbjct: 12 DDSQLSFESGDKLLVLRKPSVDWWWA 37
>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 = 28.4 bits (64), Expect = 0.85
Identities = 11/35 (31%), Positives = 19/35 (54%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
++L F+KGDI + D + ++ G +GMI
Sbjct: 16 EDLPFKKGDILTIVAVTKDPNWYKAKNKDGREGMI 50
>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 = 29.5 bits (66), Expect = 0.86
Identities = 14/40 (35%), Positives = 23/40 (57%), Gaps = 2/40 (5%)
Query: 58 DWFHPECTKNDAVDMLVKAG--PGSFLVRPSDNSPGDYSL 95
+W+ + + DA L+ G G+FL+R S+ + G YSL
Sbjct: 4 EWYFGKIGRKDAERQLLSPGNPRGAFLIRESETTKGAYSL 43
>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 = 28.6 bits (64), Expect = 0.89
Identities = 12/36 (33%), Positives = 19/36 (52%), Gaps = 5/36 (13%)
Query: 7 LTFQKGDIFFVHNELGD-----GWLWVTAHRTGEQG 37
L+F KGD+ + + G+ GW RTG++G
Sbjct: 20 LSFAKGDLIILDQDTGEQVMNSGWCNGRNDRTGQRG 55
>gnl|CDD|198282 cd10419, SH2_Src_Fyn_isoform_b_like, Src homology 2 (SH2) domain
found in Fyn isoform b like proteins. Fyn is a member
of the Src non-receptor type tyrosine kinase family of
proteins. This cd contains the SH2 domain found in Fyn
isoform b type proteins. Fyn is involved in the control
of cell growth and is required in the following
pathways: T and B cell receptor signaling,
integrin-mediated signaling, growth factor and cytokine
receptor signaling, platelet activation, ion channel
function, cell adhesion, axon guidance, fertilization,
entry into mitosis, and differentiation of natural
killer cells, oligodendrocytes and keratinocytes. The
protein associates with the p85 subunit of
phosphatidylinositol 3-kinase and interacts with the
Fyn-binding protein. Alternatively spliced transcript
variants encoding distinct isoforms exist. Fyn is
primarily localized to the cytoplasmic leaflet of the
plasma membrane. Tyrosine phosphorylation of target
proteins by Fyn serves to either regulate target protein
activity, and/or to generate a binding site on the
target protein that recruits other signaling molecules.
FYN has been shown to interact with a number of proteins
including: BCAR1, Cbl, Janus kinase, nephrin, Sky,
tyrosine kinase, Wiskott-Aldrich syndrome protein, and
Zap-70. Fyn has a unique N-terminal domain, an SH3
domain, an SH2 domain, a kinase domain and a regulatory
tail, as do the other members of the family. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 29.3 bits (65), Expect = 0.92
Identities = 21/86 (24%), Positives = 39/86 (45%), Gaps = 9/86 (10%)
Query: 59 WFHPECTKNDAVDMLVKAGP--GSFLVRPSDNSPGDYSLFFH-----INNQIQRFRIEK- 110
W+ + + DA L+ G G+FL+R S+ + G YSL + ++ ++I K
Sbjct: 5 WYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIRKL 64
Query: 111 -KAVRYLMGGRTFECLDAVINRYRKE 135
Y+ FE L ++ Y ++
Sbjct: 65 DNGGYYITTRAQFETLQQLVQHYSEK 90
>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 = 28.2 bits (63), Expect = 1.1
Identities = 13/40 (32%), Positives = 20/40 (50%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLV 44
+EL QKG+ V + +GWL + TG G+ + V
Sbjct: 14 EELELQKGEGVRVLGKFQEGWLRGLSLVTGRVGIFPSNYV 53
>gnl|CDD|198281 cd10418, SH2_Src_Fyn_isoform_a_like, Src homology 2 (SH2) domain
found in Fyn isoform a like proteins. Fyn is a member
of the Src non-receptor type tyrosine kinase family of
proteins. This cd contains the SH2 domain found in Fyn
isoform a type proteins. Fyn is involved in the control
of cell growth and is required in the following
pathways: T and B cell receptor signaling,
integrin-mediated signaling, growth factor and cytokine
receptor signaling, platelet activation, ion channel
function, cell adhesion, axon guidance, fertilization,
entry into mitosis, and differentiation of natural
killer cells, oligodendrocytes and keratinocytes. The
protein associates with the p85 subunit of
phosphatidylinositol 3-kinase and interacts with the
Fyn-binding protein. Alternatively spliced transcript
variants encoding distinct isoforms exist. Fyn is
primarily localized to the cytoplasmic leaflet of the
plasma membrane. Tyrosine phosphorylation of target
proteins by Fyn serves to either regulate target protein
activity, and/or to generate a binding site on the
target protein that recruits other signaling molecules.
FYN has been shown to interact with a number of proteins
including: BCAR1, Cbl, Janus kinase, nephrin, Sky,
tyrosine kinase, Wiskott-Aldrich syndrome protein, and
Zap-70. Fyn has a unique N-terminal domain, an SH3
domain, an SH2 domain, a kinase domain and a regulatory
tail, as do the other members of the family. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 29.2 bits (65), Expect = 1.1
Identities = 21/84 (25%), Positives = 38/84 (45%), Gaps = 9/84 (10%)
Query: 58 DWFHPECTKNDAVDMLVKAGP--GSFLVRPSDNSPGDYSLFFH-----INNQIQRFRIEK 110
+W+ + + DA L+ G G+FL+R S+ + G YSL + ++ ++I K
Sbjct: 4 EWYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIRK 63
Query: 111 --KAVRYLMGGRTFECLDAVINRY 132
Y+ FE L ++ Y
Sbjct: 64 LDNGGYYITTRAQFETLQQLVQHY 87
>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 = 28.1 bits (62), Expect = 1.2
Identities = 11/21 (52%), Positives = 15/21 (71%)
Query: 5 DELTFQKGDIFFVHNELGDGW 25
DEL+FQ+G I +V + DGW
Sbjct: 17 DELSFQEGAIIYVIKKNDDGW 37
>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 = 28.0 bits (63), Expect = 1.3
Identities = 16/45 (35%), Positives = 24/45 (53%), Gaps = 7/45 (15%)
Query: 2 PDTDELTFQKGDIFFVHNELGDG----WLWV---TAHRTGEQGMI 39
P EL+F+KG++F V + L G W V H+ E+G+I
Sbjct: 11 PAKGELSFKKGEVFHVVDTLYQGTVGSWQAVRVGRNHQELERGVI 55
>gnl|CDD|198221 cd10358, SH2_PTK6_Brk, Src homology 2 domain found in
protein-tyrosine kinase-6 (PTK6) which is also known as
breast tumor kinase (Brk). Human protein-tyrosine
kinase-6 (PTK6, also known as breast tumor kinase (Brk))
is a member of the non-receptor protein-tyrosine kinase
family and is expressed in two-thirds of all breast
tumors. PTK6 (9). PTK6 contains a SH3 domain, a SH2
domain, and catalytic domains. For the case of the
non-receptor protein-tyrosine kinases, the SH2 domain is
typically involved in negative regulation of kinase
activity by binding to a phosphorylated tyrosine residue
near to the C terminus. The C-terminal sequence of PTK6
(PTSpYENPT where pY is phosphotyrosine) is thought to be
a self-ligand for the SH2 domain. The structure of the
SH2 domain resembles other SH2 domains except for a
centrally located four-stranded antiparallel beta-sheet
(strands betaA, betaB, betaC, and betaD). There are also
differences in the loop length which might be
responsible for PTK6 ligand specificity. There are two
possible means of regulation of PTK6: autoinhibitory
with the phosphorylation of Tyr playing a role in its
negative regulation and autophosphorylation at this
site, though it has been shown that PTK6 might
phosphorylate signal transduction-associated proteins
Sam68 and signal transducing adaptor family member 2
(STAP/BKS) in vivo. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 100
Score = 28.9 bits (64), Expect = 1.4
Identities = 22/92 (23%), Positives = 41/92 (44%), Gaps = 4/92 (4%)
Query: 59 WFHPECTKNDAVDMLVKA--GPGSFLVRPSDNSPGDYSLFFHINNQIQRFRIEK--KAVR 114
WF ++++AV L G+FL+R S+ DY L ++ ++I +
Sbjct: 4 WFFGCISRSEAVRRLQAEGNATGAFLIRVSEKPSADYVLSVRDTQAVRHYKIWRRAGGRL 63
Query: 115 YLMGGRTFECLDAVINRYRKEQIVEGHTLGFP 146
+L +F L ++N +R + + G L P
Sbjct: 64 HLNEAVSFLSLPELVNYHRAQSLSHGLRLAAP 95
>gnl|CDD|198188 cd09934, SH2_Tec_family, Src homology 2 (SH2) domain found in
Tec-like proteins. The Tec protein tyrosine kinase is
the founding member of a family that includes Btk, Itk,
Bmx, and Txk. The members have a PH domain, a
zinc-binding motif, a SH3 domain, a SH2 domain, and a
protein kinase catalytic domain. Btk is involved in
B-cell receptor signaling with mutations in Btk
responsible for X-linked agammaglobulinemia (XLA) in
humans and X-linked immunodeficiency (xid) in mice. Itk
is involved in T-cell receptor signaling. Tec is
expressed in both T and B cells, and is thought to
function in activated and effector T lymphocytes to
induce the expression of genes regulated by NFAT
transcription factors. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 104
Score = 28.9 bits (65), Expect = 1.5
Identities = 15/61 (24%), Positives = 32/61 (52%), Gaps = 6/61 (9%)
Query: 57 FDWFHPECTKNDAVDMLVKAGP-GSFLVRPSDNSPGDY--SLFFHINN--QIQRFRIEKK 111
++W+ + ++ A +L + G F+VR S ++ G Y SLF + ++ + I++
Sbjct: 6 YEWYVGDMSRQRAESLLKQEDKEGCFVVRNS-STKGLYTVSLFTKVPGSPHVKHYHIKQN 64
Query: 112 A 112
A
Sbjct: 65 A 65
>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 = 27.5 bits (61), Expect = 1.5
Identities = 12/34 (35%), Positives = 21/34 (61%), Gaps = 2/34 (5%)
Query: 6 ELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
EL+F++GD+ +H++ W W H G +G+I
Sbjct: 17 ELSFKRGDVLLLHSKASSDW-WRGEH-NGMRGLI 48
>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 = 27.4 bits (61), Expect = 1.6
Identities = 10/24 (41%), Positives = 15/24 (62%), Gaps = 1/24 (4%)
Query: 3 DTDELTFQKGDIFF-VHNELGDGW 25
++DEL+F+ GDI + E GW
Sbjct: 12 ESDELSFKAGDILTKLEEEDEQGW 35
>gnl|CDD|198231 cd10368, SH2_Src_Fyn, Src homology 2 (SH2) domain found in Fyn.
Fyn is a member of the Src non-receptor type tyrosine
kinase family of proteins. Fyn is involved in the
control of cell growth and is required in the following
pathways: T and B cell receptor signaling,
integrin-mediated signaling, growth factor and cytokine
receptor signaling, platelet activation, ion channel
function, cell adhesion, axon guidance, fertilization,
entry into mitosis, and differentiation of natural
killer cells, oligodendrocytes and keratinocytes. The
protein associates with the p85 subunit of
phosphatidylinositol 3-kinase and interacts with the
Fyn-binding protein. Alternatively spliced transcript
variants encoding distinct isoforms exist. Fyn is
primarily localized to the cytoplasmic leaflet of the
plasma membrane. Tyrosine phosphorylation of target
proteins by Fyn serves to either regulate target protein
activity, and/or to generate a binding site on the
target protein that recruits other signaling molecules.
FYN has been shown to interact with a number of proteins
including: BCAR1, Cbl, Janus kinase, nephrin, Sky,
tyrosine kinase, Wiskott-Aldrich syndrome protein, and
Zap-70. Fyn has a unique N-terminal domain, an SH3
domain, an SH2 domain, a kinase domain and a regulatory
tail, as do the other members of the family. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 28.5 bits (63), Expect = 1.8
Identities = 21/84 (25%), Positives = 38/84 (45%), Gaps = 9/84 (10%)
Query: 58 DWFHPECTKNDAVDMLVKAGP--GSFLVRPSDNSPGDYSLFFH-----INNQIQRFRIEK 110
+W+ + + DA L+ G G+FL+R S+ + G YSL + ++ ++I K
Sbjct: 4 EWYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIRK 63
Query: 111 --KAVRYLMGGRTFECLDAVINRY 132
Y+ FE L ++ Y
Sbjct: 64 LDNGGYYITTRAQFETLQQLVQHY 87
>gnl|CDD|198254 cd10391, SH2_SHE, Src homology 2 domain found in SH2
domain-containing adapter protein E (SHE). SHE is
expressed in heart, lung, brain, and skeletal muscle.
SHE contains two pTry protein binding domains, protein
interaction domain (PID) and a SH2 domain, followed by
a glycine-proline rich region, all of which are
N-terminal to the phosphotyrosine binding (PTB) domain.
In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 98
Score = 28.4 bits (63), Expect = 1.9
Identities = 11/37 (29%), Positives = 19/37 (51%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSL 95
W+H ++ +A L S+LVR S++ YS+
Sbjct: 3 WYHGSISRAEAESRLQPCKEASYLVRNSESGNSKYSI 39
>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 = 1.9
Identities = 11/38 (28%), Positives = 24/38 (63%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRD 42
DEL+F++GD+ ++ ++ D + W G+ G++ +D
Sbjct: 14 DELSFKRGDLIYIISKEYDSFGWWVGELNGKVGLVPKD 51
>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 = 28.4 bits (63), Expect = 1.9
Identities = 21/94 (22%), Positives = 41/94 (43%), Gaps = 6/94 (6%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFRI-EKKAVRYLM 117
W+ + A L+ ++LVR G+Y++ NN+++ +I + ++
Sbjct: 7 WYAGAMERLQAETELINRVNSTYLVRHRTKESGEYAISIKYNNEVKHIKILTRDGFFHIA 66
Query: 118 GGRTFECLDAVINRYRKEQIVEGH-----TLGFP 146
R F+ L ++ Y+ + EG TL FP
Sbjct: 67 ENRKFKSLMELVEYYKHHSLKEGFRSLDTTLQFP 100
Score = 27.7 bits (61), Expect = 3.5
Identities = 18/73 (24%), Positives = 35/73 (47%), Gaps = 6/73 (8%)
Query: 165 SFLVRPSDNSPGDYSLFFHINNQIQRFRI-EKKAVRYLMGGRTFECLDAVINRYRKEQIV 223
++LVR G+Y++ NN+++ +I + ++ R F+ L ++ Y+ +
Sbjct: 28 TYLVRHRTKESGEYAISIKYNNEVKHIKILTRDGFFHIAENRKFKSLMELVEYYKHHSLK 87
Query: 224 EGH-----TLGFP 231
EG TL FP
Sbjct: 88 EGFRSLDTTLQFP 100
>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 = 27.3 bits (61), Expect = 2.0
Identities = 14/35 (40%), Positives = 16/35 (45%), Gaps = 6/35 (17%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWV-----TAHRTG 34
DELTF +G+I V E D W W R G
Sbjct: 14 DELTFSEGEIIVVTGEEDDEW-WEGHIEGDPSRRG 47
>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 = 2.0
Identities = 14/41 (34%), Positives = 24/41 (58%), Gaps = 3/41 (7%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 45
DEL+F+KGD+ + L +W A GE+G + ++ V+
Sbjct: 14 DELSFKKGDVLKI---LSSDDIWFKAELNGEEGYVPKNFVD 51
>gnl|CDD|198278 cd10415, SH2_Grb10, Src homology 2 (SH2) domain found in the growth
factor receptor bound, subclass 10 (Grb10) proteins.
The Grb family binds to the epidermal growth factor
receptor (EGFR, erbB1) via their SH2 domains. Grb10 is
part of the Grb7 family of proteins which also includes
Grb7, and Grb14. They are composed of an N-terminal
Proline-rich domain, a Ras Associating-like (RA) domain,
a Pleckstrin Homology (PH) domain, a phosphotyrosine
interaction region (PIR, BPS) and a C-terminal SH2
domain. The SH2 domains of Grb7, Grb10 and Grb14
preferentially bind to a different RTK. Grb10 has been
shown to interact with many different proteins,
including the insulin and IGF1 receptors,
platelet-derived growth factor (PDGF) receptor-beta,
Ret, Kit, Raf1 and MEK1, and Nedd4. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 108
Score = 28.4 bits (63), Expect = 2.2
Identities = 14/52 (26%), Positives = 29/52 (55%), Gaps = 2/52 (3%)
Query: 59 WFHPECTKNDAVDMLVKAG--PGSFLVRPSDNSPGDYSLFFHINNQIQRFRI 108
WFH ++ ++ ++ + G G FL+R S ++P + L + +I+ F+I
Sbjct: 7 WFHGRISREESHRIIKQQGLVDGLFLLRDSQSNPKAFVLTLCHHQKIKNFQI 58
>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 = 27.3 bits (61), Expect = 2.2
Identities = 13/37 (35%), Positives = 21/37 (56%), Gaps = 1/37 (2%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
D ++L F+KG+I V + + W W + G+ GMI
Sbjct: 13 DDEDLPFKKGEILTVIRKPEEQW-WNARNSEGKTGMI 48
>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 = 27.2 bits (61), Expect = 2.2
Identities = 12/40 (30%), Positives = 21/40 (52%), Gaps = 2/40 (5%)
Query: 6 ELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIFRDLVE 45
EL F++GDI + N++ + W + G+ G + VE
Sbjct: 16 ELGFKEGDIITLTNQIDENWYEGMVN--GQSGFFPVNYVE 53
>gnl|CDD|198234 cd10371, SH2_Src_Blk, Src homology 2 (SH2) domain found in B
lymphoid kinase (Blk). Blk is a member of the Src
non-receptor type tyrosine kinase family of proteins.
Blk is expressed in the B-cells. Unlike most other Src
members Blk lacks cysteine residues in the SH4 domain
that undergo palmitylation. Blk is required for the
development of IL-17-producing gamma-delta T cells.
Furthermore, Blk is expressed in lymphoid precursors
and, in this capacity, plays a role in regulating thymus
cellularity during ontogeny. Blk has a unique N-terminal
domain, an SH3 domain, an SH2 domain, a kinase domain
and a regulatory tail, as do the other members of the
family. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 100
Score = 28.4 bits (63), Expect = 2.3
Identities = 23/85 (27%), Positives = 40/85 (47%), Gaps = 8/85 (9%)
Query: 59 WFHPECTKNDAVDMLVKA--GPGSFLVRPSDNSPGDYSLFFH-INNQ---IQRFRIE--K 110
WF ++ DA L+ GSFL+R S+++ G +SL + Q ++ ++I
Sbjct: 5 WFFRTISRKDAERQLLAPMNKAGSFLIRESESNKGAFSLSVKDVTTQGEVVKHYKIRSLD 64
Query: 111 KAVRYLMGGRTFECLDAVINRYRKE 135
Y+ TF L A++ Y K+
Sbjct: 65 NGGYYISPRITFPTLQALVQHYSKK 89
>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 = 27.3 bits (60), Expect = 2.4
Identities = 12/31 (38%), Positives = 18/31 (58%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRT 33
+ DEL ++GD+ V + DGW T+ RT
Sbjct: 17 NEDELELREGDVIDVMEKCDDGWFVGTSRRT 47
>gnl|CDD|198258 cd10395, SH2_RIN3, Src homology 2 (SH2) domain found in Ras and Rab
interactor 3 (RIN3)-like proteins. RIN3, a member of
the RIN (AKA Ras interaction/interference) family, have
multifunctional domains including SH2 and proline-rich
(PR) domains in the N-terminal region, and RIN-family
homology (RH), VPS9 and Ras-association (RA) domains in
the C-terminal region. RIN proteins function as
Rab5-GEFs. RIN3 stimulated the formation of GTP-bound
Rab31, a Rab5-subfamily GTPase, and formed enlarged
vesicles and tubular structures, where it colocalized
with Rab31. Transferrin appeared to be transported
partly through the RIN3-positive vesicles to early
endosomes. RIN3 interacts via its Pro-rich domain with
amphiphysin II, which contains SH3 domain and
participates in receptor-mediated endocytosis. RIN3, a
Rab5 and Rab31 GEF, plays an important role in the
transport pathway from plasma membrane to early
endosomes. Mutations in the region between the SH2 and
RH domain of RIN3 specifically abolished its GEF action
on Rab31, but not Rab5. RIN3 was also found to partially
translocate the cation-dependent mannose 6-phosphate
receptor from the trans-Golgi network to peripheral
vesicles and that this is dependent on its Rab31-GEF
activity. These data indicate that RIN3 specifically
acts as a GEF for Rab31. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 28.2 bits (63), Expect = 2.4
Identities = 18/66 (27%), Positives = 29/66 (43%), Gaps = 7/66 (10%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQ-----IQRFRI-EKKA 112
W + +A +L K G FLVR D++ L H + + + I E+K+
Sbjct: 12 WLQLGMNQAEAARILHKEVAGMFLVR-RDSNSKQMVLCVHFPSNESSAEVLEYPIKEEKS 70
Query: 113 VRYLMG 118
+ YL G
Sbjct: 71 ILYLEG 76
>gnl|CDD|225267 COG2403, COG2403, Predicted GTPase [General function prediction
only].
Length = 449
Score = 29.7 bits (67), Expect = 2.4
Identities = 14/42 (33%), Positives = 27/42 (64%), Gaps = 1/42 (2%)
Query: 264 VMPSEEYSPLQQLLLESDL-AVVKALADVCHGDRNRLASSLL 304
++P ++Y L++++ E D+ VV A +DV + R+AS +L
Sbjct: 65 ILPEKDYDDLEKIIREKDVDIVVLAYSDVSYEHVFRIASRVL 106
>gnl|CDD|198269 cd10406, SH2_Vav2, Src homology 2 (SH2) domain found in the Vav2
proteins. Proto-oncogene vav is a member of the Dbl
family of guanine nucleotide exchange factors (GEF) for
the Rho family of GTP binding proteins. All vavs are
activated by tyrosine phosphorylation leading to their
activation. There are three Vav mammalian family
members: Vav1 which is expressed in the hematopoietic
system, and Vav2 and Vav3 are more ubiquitously
expressed. Vav2 is a GEF for RhoA, RhoB and RhoG and may
activate Rac1 and Cdc42. Vav2 has been shown to interact
with CD19 and Grb2. Alternatively spliced transcript
variants encoding different isoforms have been found for
Vav2. Vav proteins are involved in several processes
that require cytoskeletal reorganization, such as the
formation of the immunological synapse (IS),
phagocytosis, platelet aggregation, spreading, and
transformation. Vavs function as guanine nucleotide
exchange factors (GEFs) for the Rho/Rac family of
GTPases. Vav family members have several conserved
motifs/domains including: a leucine-rich region, a
leucine-zipper, a calponin homology (CH) domain, an
acidic domain, a Dbl-homology (DH) domain, a pleckstrin
homology (PH) domain, a cysteine-rich domain, 2 SH3
domains, a proline-rich region, and a SH2 domain. Vavs
are the only known Rho GEFs that have both the DH/PH
motifs and SH2/SH3 domains in the same protein. The
leucine-rich helix-loop-helix (HLH) domain is thought to
be involved in protein heterodimerization with other HLH
proteins and it may function as a negative regulator by
forming inactive heterodimers. The CH domain is usually
involved in the association with filamentous actin, but
in Vav it controls NFAT stimulation, Ca2+ mobilization,
and its transforming activity. Acidic domains are
involved in protein-protein interactions and contain
regulatory tyrosines. The DH domain is a GDP-GTP
exchange factor on Rho/Rac GTPases. The PH domain in
involved in interactions with GTP-binding proteins,
lipids and/or phosphorylated serine/threonine residues.
The SH3 domain is involved in localization of proteins
to specific sites within the cell interacting with
protein with proline-rich sequences. The SH2 domain
mediates a high affinity interaction with tyrosine
phosphorylated proteins. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 28.1 bits (62), Expect = 2.6
Identities = 18/98 (18%), Positives = 42/98 (42%), Gaps = 6/98 (6%)
Query: 55 TVFDWFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSLFFHINNQIQRFR-IEKKAV 113
T + WF + ++L G++L+R +++ N++++ + +EK
Sbjct: 3 TAYPWFAGNMERQQTDNLLKSHASGTYLIRERPAEAERFAISIKFNDEVKHIKVVEKDNW 62
Query: 114 RYLMGGRTFECLDAVINRYRKEQIVEGH-----TLGFP 146
++ + FE L ++ Y+ + E TL +P
Sbjct: 63 IHITEAKKFESLLELVEYYQCHSLKESFKQLDTTLKYP 100
>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 = 29.3 bits (66), Expect = 2.6
Identities = 21/80 (26%), Positives = 30/80 (37%), Gaps = 11/80 (13%)
Query: 161 SCHKSFLV-RPSDNSPGDYSLFFH-INNQIQRFRIEKKAVRYLMG-GRTFE------CLD 211
K + RP + P DY + +QI R ++ V MG G CLD
Sbjct: 100 PDFKRIKLGRPLLDYPEDYEEVVEALKDQIPPLRKDEALV--FMGHGTDHHSNAVYACLD 157
Query: 212 AVINRYRKEQIVEGHTLGFP 231
V+ Y + G G+P
Sbjct: 158 HVMRNYPFPNVFVGTVEGYP 177
Score = 28.1 bits (63), Expect = 7.0
Identities = 20/71 (28%), Positives = 28/71 (39%), Gaps = 10/71 (14%)
Query: 84 RPSDNSPGDYSLFFH-INNQIQRFRIEKKAVRYLMG-GRTFE------CLDAVINRYRKE 135
RP + P DY + +QI R ++ V MG G CLD V+ Y
Sbjct: 109 RPLLDYPEDYEEVVEALKDQIPPLRKDEALV--FMGHGTDHHSNAVYACLDHVMRNYPFP 166
Query: 136 QIVEGHTLGFP 146
+ G G+P
Sbjct: 167 NVFVGTVEGYP 177
>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 = 26.9 bits (60), Expect = 2.8
Identities = 15/35 (42%), Positives = 21/35 (60%), Gaps = 1/35 (2%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMI 39
DEL+F+KG I V N + D W A G++G+I
Sbjct: 14 DELSFKKGSILKVLN-MEDDPNWYKAELDGKEGLI 47
>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 = 26.8 bits (59), Expect = 3.0
Identities = 14/35 (40%), Positives = 18/35 (51%), Gaps = 2/35 (5%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 37
+ DELTF +G+I V E W W+ H GE
Sbjct: 12 NPDELTFSEGEIIIVDGEEDKEW-WI-GHIDGEPT 44
>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 = 27.0 bits (59), Expect = 3.1
Identities = 15/34 (44%), Positives = 18/34 (52%), Gaps = 3/34 (8%)
Query: 3 DTDELTFQKGDIFFVHNELGDGWLWVTAH--RTG 34
+ DEL+F KGD+ V GW W H RTG
Sbjct: 12 NEDELSFSKGDVIHVTRVEEGGW-WEGTHNGRTG 44
>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 = 26.7 bits (59), Expect = 3.6
Identities = 14/34 (41%), Positives = 19/34 (55%), Gaps = 1/34 (2%)
Query: 4 TDELTFQKGDIFFVHNELGDGWLWVTAHRTGEQG 37
+DELT +GDI V + D W W + G+QG
Sbjct: 13 SDELTIHRGDIIRVLYKDNDNW-WFGSLVNGQQG 45
>gnl|CDD|227226 COG4889, COG4889, Predicted helicase [General function prediction
only].
Length = 1518
Score = 29.4 bits (66), Expect = 4.2
Identities = 13/35 (37%), Positives = 21/35 (60%), Gaps = 2/35 (5%)
Query: 100 NNQIQRFRIEKKAVRYLMGGRTFECLDAVINRYRK 134
N+ I I +KA Y++ GR+ +D VI+RY+
Sbjct: 1444 NSSITITGIPEKAFDYVVNGRS--AIDWVIDRYQV 1476
Score = 29.4 bits (66), Expect = 4.2
Identities = 13/35 (37%), Positives = 21/35 (60%), Gaps = 2/35 (5%)
Query: 185 NNQIQRFRIEKKAVRYLMGGRTFECLDAVINRYRK 219
N+ I I +KA Y++ GR+ +D VI+RY+
Sbjct: 1444 NSSITITGIPEKAFDYVVNGRS--AIDWVIDRYQV 1476
>gnl|CDD|235677 PRK06029, PRK06029, 3-octaprenyl-4-hydroxybenzoate carboxy-lyase;
Provisional.
Length = 185
Score = 28.3 bits (64), Expect = 4.7
Identities = 19/48 (39%), Positives = 25/48 (52%), Gaps = 2/48 (4%)
Query: 274 QQLLLESDLAV--VKALADVCHGDRNRLASSLLRIFSLDVKETLPCSI 319
Q L E+D ++ V+ALADV H R+ AS F D PCS+
Sbjct: 42 QTLAHETDFSLRDVQALADVVHDVRDIGASIASGSFGTDGMVIAPCSM 89
>gnl|CDD|212819 cd11886, SH3_BOI, Src Homology 3 domain of fungal BOI-like
proteins. This subfamily includes the Saccharomyces
cerevisiae proteins BOI1 and BOI2, and similar
proteins. They contain an N-terminal SH3 domain, a
Sterile alpha motif (SAM), and a Pleckstrin homology
(PH) domain at the C-terminus. BOI1 and BOI2 interact
with the SH3 domain of Bem1p, a protein involved in bud
formation. They promote polarized cell growth and
participates in the NoCut signaling pathway, which is
involved in the control of cytokinesis. SH3 domains
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs; they play a
role in the regulation of enzymes by intramolecular
interactions, changing the subcellular localization of
signal pathway components and mediate multiprotein
complex assemblies.
Length = 55
Score = 26.1 bits (58), Expect = 4.8
Identities = 16/37 (43%), Positives = 19/37 (51%), Gaps = 3/37 (8%)
Query: 5 DELTFQKGDIFFV---HNELGDGWLWVTAHRTGEQGM 38
DELT + GD + E GDGW RTGE G+
Sbjct: 14 DELTLKPGDKIELIEDDEEFGDGWYLGRNLRTGETGL 50
>gnl|CDD|213336 cd05134, RasGAP_RASA3, Ras-GTPase Activating Domain of RASA3.
RASA3 (or GAP1_IP4BP) is a member of the GAP1 family and
has been shown to specifically bind
1,3,4,5-tetrakisphosphate (IP4). Thus, RASA3 may
function as an IP4 receptor. The members of GAP1 family
are characterized by a conserved domain structure
comprising N-terminal tandem C2 domains, a highly
conserved central RasGAP domain, and a C-terminal
pleckstrin-homology domain that is associated with a
Bruton's tyrosine kinase motif. Purified RASA3
stimulates GAP activity on Ras with about a five-fold
lower potency than p120RasGAP, but shows no
GAP-stimulating activity at all against Rac or Rab3A.
Length = 269
Score = 28.5 bits (63), Expect = 5.3
Identities = 20/47 (42%), Positives = 28/47 (59%), Gaps = 7/47 (14%)
Query: 267 SEEYSPLQQLLLES-DLAVVKA-----LADVCHGDRNRLASSLLRIF 307
SE YSPL+ LLL+S D+ V A L +VC ++ A L+R+F
Sbjct: 1 SEYYSPLRDLLLKSADVEPVSASAAHILGEVCR-EKQEAAIPLVRLF 46
>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 = 26.1 bits (58), Expect = 6.0
Identities = 15/36 (41%), Positives = 19/36 (52%), Gaps = 1/36 (2%)
Query: 5 DELTFQKGDIFFVHNELGDGWLWVTAHRTGEQGMIF 40
DE+ GD +V E D W T RTG++G IF
Sbjct: 14 DEIELDIGDPVYVEQEADDLWCEGTNLRTGQRG-IF 48
>gnl|CDD|198246 cd10383, SH2_SOCS2, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first
recognized as a group of cytokine-inducible SH2 (CIS)
domain proteins comprising eight family members in
human (CIS and SOCS1-SOCS7). In addition to the SH2
domain, SOCS proteins have a variable N-terminal domain
and a conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation.
Loss of SOCS activity results in excessive cytokine
signaling associated with a variety of hematopoietic,
autoimmune, and inflammatory diseases and certain
cancers. Members (SOCS4-SOCS7) were identified by their
conserved SOCS box, an adapter motif of 3 helices that
associates substrate binding domains, such as the SOCS
SH2 domain, ankryin, and WD40 with ubiquitin ligase
components. These show limited cytokine induction. In
general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 103
Score = 27.2 bits (60), Expect = 6.6
Identities = 16/37 (43%), Positives = 21/37 (56%), Gaps = 2/37 (5%)
Query: 59 WFHPECTKNDAVDMLVKAGPGSFLVRPSDNSPGDYSL 95
W+ T N+A + L A G+FLVR D+S DY L
Sbjct: 9 WYWGSMTVNEAKEKLQDAPEGTFLVR--DSSHSDYLL 43
>gnl|CDD|198183 cd09929, SH2_BLNK_SLP-76, Src homology 2 (SH2) domain found in
B-cell linker (BLNK) protein and SH2 domain-containing
leukocyte protein of 76 kDa (SLP-76). BLNK (also known
as SLP-65 or BASH) is an important adaptor protein
expressed in B-lineage cells. BLNK consists of a
N-terminal sterile alpha motif (SAM) domain and a
C-terminal SH2 domain. BLNK is a cytoplasmic protein,
but a part of it is bound to the plasma membrane through
an N-terminal leucine zipper motif and transiently bound
to a cytoplasmic domain of Iga through its C-terminal
SH2 domain upon B cell antigen receptor
(BCR)-stimulation. A non-ITAM phosphotyrosine in Iga is
necessary for the binding with the BLNK SH2 domain
and/or for normal BLNK function in signaling and B cell
activation. Upon phosphorylation BLNK binds Btk and
PLCgamma2 through their SH2 domains and mediates
PLCgamma2 activation by Btk. BLNK also binds other
signaling molecules such as Vav, Grb2, Syk, and HPK1.
BLNK has been shown to be necessary for BCR-mediated
Ca2+ mobilization, for the activation of
mitogen-activated protein kinases such as ERK, JNK, and
p38 in a chicken B cell line DT40, and for activation of
transcription factors such as NF-AT and NF-kappaB in
human or mouse B cells. BLNK is involved in B cell
development, B cell survival, activation, proliferation,
and T-independent immune responses. BLNK is structurally
homologous to SLP-76. SLP-76 and (linker for activation
of T cells) LAT are adaptor/linker proteins in T cell
antigen receptor activation and T cell development. BLNK
interacts with many downstream signaling proteins that
interact directly with both SLP-76 and LAT. New data
suggest functional complementation of SLP-76 and LAT in
T cell antigen receptor function with BLNK in BCR
function. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 121
Score = 27.3 bits (61), Expect = 7.2
Identities = 21/90 (23%), Positives = 38/90 (42%), Gaps = 10/90 (11%)
Query: 59 WFHPECTKNDAVDMLVKAGP-GSFLVRPSDNSPGD--YSLFFHINNQ---IQRFRIEKKA 112
W+ + +A + L ++ G+FLVR S Y+L N++ IQ +E
Sbjct: 13 WYAGNIDRKEAEEALRRSNKDGTFLVRDSSGKDSSQPYTLMVLYNDKVYNIQIRFLENTR 72
Query: 113 V----RYLMGGRTFECLDAVINRYRKEQIV 138
L G TF + +I ++K ++
Sbjct: 73 QYALGTGLRGEETFSSVAEIIEHHQKTPLL 102
>gnl|CDD|233020 TIGR00553, pabB, aminodeoxychorismate synthase, component I,
bacterial clade. Members of this family,
aminodeoxychorismate synthase, component I (PabB), were
designated para-aminobenzoate synthase component I until
it was recognized that PabC, a lyase, completes the
pathway of PABA synthesis. This family is closely
related to anthranilate synthase component I (trpE), and
both act on chorismate. The clade of PabB enzymes
represented by this model includes sequences from
Gram-positive and alpha and gamma Proteobacteria as well
as Chlorobium, Nostoc, Fusobacterium and Arabidopsis. A
closely related clade of fungal PabB enzymes is
identified by TIGR01823, while another bacterial clade
of potential PabB enzymes is more closely related to
TrpE (TIGR01824) [Biosynthesis of cofactors, prosthetic
groups, and carriers, Folic acid].
Length = 328
Score = 28.1 bits (63), Expect = 8.2
Identities = 21/94 (22%), Positives = 37/94 (39%), Gaps = 14/94 (14%)
Query: 279 ESDLAVVKALADVCHGDR--NRLASSLLR--------IFSLDVKETLPCSI-FYAILFQT 327
+ D A ALA+ DR N + LLR + S+ V E + Y + Q
Sbjct: 165 QEDRAQASALAE-SAKDRAENLMIVDLLRNDLGRIAEVGSVKVPE--LFVVETYPTVHQL 221
Query: 328 VTEVDAKIKPVQHAEKIYATLRECREQVGLKKIK 361
V+ + A+++ ++ L G K++
Sbjct: 222 VSTITARLREDLTLSDLFRALFPGGSITGAPKVR 255
>gnl|CDD|219447 pfam07520, SrfB, Virulence factor SrfB. This family includes
homologues of SsrAB is a two-component regulatory system
encoded within the Salmonella pathogenicity island
SPI-2. Among the products of genes activated by SsrAB
within epithelial and macrophage cells is Salmonella
typhimurium srfB. Homologues are found in several other
proteobacteria.
Length = 999
Score = 28.1 bits (63), Expect = 9.3
Identities = 12/41 (29%), Positives = 16/41 (39%), Gaps = 4/41 (9%)
Query: 203 GGRTFECLDAVINRYRKEQIVEGHTLGFPVTRTEDWFSLAG 243
GG T D VI Y + V + P + F +AG
Sbjct: 576 GGTT----DLVITDYYLDDGVGANVKIIPDQLFREGFKVAG 612
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
0.323 0.139 0.430
Gapped
Lambda K H
0.267 0.0813 0.140
Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 44354
Number of Hits to DB: 19,346,120
Number of extensions: 1907370
Number of successful extensions: 1908
Number of sequences better than 10.0: 1
Number of HSP's gapped: 1878
Number of HSP's successfully gapped: 207
Length of query: 366
Length of database: 10,937,602
Length adjustment: 98
Effective length of query: 268
Effective length of database: 6,590,910
Effective search space: 1766363880
Effective search space used: 1766363880
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.5 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (22.0 bits)
S2: 60 (26.7 bits)