RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy3210
(272 letters)
>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 = 148 bits (377), Expect = 9e-46
Identities = 59/109 (54%), Positives = 78/109 (71%), Gaps = 8/109 (7%)
Query: 85 LSEYLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKV 144
LSE+LWFVGEM R+ A + LE DGTYL+R+RPQG ET YALS+K + VKHMK+
Sbjct: 2 LSEFLWFVGEMERDTAENRLENRPDGTYLVRVRPQG-----ETQYALSIKYNGDVKHMKI 56
Query: 145 YEKEMDGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLPF 193
++ Y+LS+SR+F+S+VEL+ YERNSL ENF GL+ L+ P+
Sbjct: 57 EQRSDGL---YYLSESRHFKSLVELVNYYERNSLGENFAGLDTTLKWPY 102
>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 = 80.7 bits (200), Expect = 1e-19
Identities = 32/89 (35%), Positives = 49/89 (55%), Gaps = 8/89 (8%)
Query: 90 WFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKEM 149
W+ G + RE+A LL+ E DG +L+R P Y LS++ KVKH ++ E
Sbjct: 3 WYHGFISREEAEKLLKNEGDGDFLVRDSESSPGD-----YVLSVRVKGKVKHYRIRRNED 57
Query: 150 DGVPQYFLSQSRYFRSIVELICCYERNSL 178
+++L R F S+VEL+ Y++NSL
Sbjct: 58 G---KFYLEGGRKFPSLVELVEHYQKNSL 83
>gnl|CDD|198268 cd10405, SH2_Vav1, Src homology 2 (SH2) domain found in the Vav1
proteins. Proto-oncogene vav is a member of the Dbl
family of guanine nucleotide exchange factors (GEF) for
the Rho family of GTP binding proteins. All vavs are
activated by tyrosine phosphorylation leading to their
activation. There are three Vav mammalian family
members: Vav1 which is expressed in the hematopoietic
system, and Vav2 and Vav3 are more ubiquitously
expressed. Vav1 plays a role in T-cell and B-cell
development and activation. It has been identified as
the specific binding partner of Nef proteins from HIV-1,
resulting in morphological changes, cytoskeletal
rearrangements, and the JNK/SAPK signaling cascade,
leading to increased levels of viral transcription and
replication. Vav1 has been shown to interact with Ku70,
PLCG1, Lymphocyte cytosolic protein 2, Janus kinase 2,
SIAH2, S100B, Abl gene, ARHGDIB, SHB, PIK3R1, PRKCQ,
Grb2, MAPK1, Syk, Linker of activated T cells, Cbl gene
and EZH2. Vav proteins are involved in several processes
that require cytoskeletal reorganization, such as the
formation of the immunological synapse (IS),
phagocytosis, platelet aggregation, spreading, and
transformation. Vavs function as guanine nucleotide
exchange factors (GEFs) for the Rho/Rac family of
GTPases. Vav family members have several conserved
motifs/domains including: a leucine-rich region, a
leucine-zipper, a calponin homology (CH) domain, an
acidic domain, a Dbl-homology (DH) domain, a pleckstrin
homology (PH) domain, a cysteine-rich domain, 2 SH3
domains, a proline-rich region, and a SH2 domain. Vavs
are the only known Rho GEFs that have both the DH/PH
motifs and SH2/SH3 domains in the same protein. The
leucine-rich helix-loop-helix (HLH) domain is thought to
be involved in protein heterodimerization with other HLH
proteins and it may function as a negative regulator by
forming inactive heterodimers. The CH domain is usually
involved in the association with filamentous actin, but
in Vav it controls NFAT stimulation, Ca2+ mobilization,
and its transforming activity. Acidic domains are
involved in protein-protein interactions and contain
regulatory tyrosines. The DH domain is a GDP-GTP
exchange factor on Rho/Rac GTPases. The PH domain in
involved in interactions with GTP-binding proteins,
lipids and/or phosphorylated serine/threonine residues.
The SH3 domain is involved in localization of proteins
to specific sites within the cell interacting with
protein with proline-rich sequences. The SH2 domain
mediates a high affinity interaction with tyrosine
phosphorylated proteins. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 79.3 bits (195), Expect = 8e-19
Identities = 41/112 (36%), Positives = 68/112 (60%), Gaps = 9/112 (8%)
Query: 84 NLSEYLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMK 143
+LS +LW+ G M R A S+L +DGTYL+R R + +A+S+K + +VKH+K
Sbjct: 1 DLSVHLWYAGPMERAGAESILANRSDGTYLVRQRVKDAAE-----FAISIKYNVEVKHIK 55
Query: 144 VYEKEMDGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLPFRQ 195
+ E G+ Y +++ + FR + EL+ Y++NSL + F L+ LQ PF++
Sbjct: 56 IMTAE--GL--YRITEKKAFRGLTELVEFYQQNSLKDCFKSLDTTLQFPFKE 103
>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 = 72.4 bits (177), Expect = 2e-16
Identities = 38/109 (34%), Positives = 67/109 (61%), Gaps = 9/109 (8%)
Query: 86 SEYLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVY 145
+ Y WF G M R++ +LL+ A GTYL+R RP +A+S+K +++VKH+KV
Sbjct: 3 TAYPWFAGNMERQQTDNLLKSHASGTYLIRERPAEAER-----FAISIKFNDEVKHIKVV 57
Query: 146 EKEMDGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLPFR 194
EK+ +++++ F S++EL+ Y+ +SL E+F L+ L+ P++
Sbjct: 58 EKD----NWIHITEAKKFESLLELVEYYQCHSLKESFKQLDTTLKYPYK 102
>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 = 70.4 bits (172), Expect = 2e-15
Identities = 36/110 (32%), Positives = 64/110 (58%), Gaps = 9/110 (8%)
Query: 86 SEYLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVY 145
S W+ G M R +A + L + TYL+R R + YA+S+K + +VKH+K+
Sbjct: 3 SCQPWYAGAMERLQAETELINRVNSTYLVRHRTKESGE-----YAISIKYNNEVKHIKIL 57
Query: 146 EKEMDGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLPFRQ 195
+ DG + ++++R F+S++EL+ Y+ +SL E F L+ LQ P+++
Sbjct: 58 TR--DGF--FHIAENRKFKSLMELVEYYKHHSLKEGFRSLDTTLQFPYKE 103
>gnl|CDD|215658 pfam00017, SH2, SH2 domain.
Length = 77
Score = 64.1 bits (157), Expect = 1e-13
Identities = 27/82 (32%), Positives = 46/82 (56%), Gaps = 9/82 (10%)
Query: 90 WFVGEMGREKATSLL-EREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKE 148
W+ G++ RE+A LL + DGT+L+R + P + Y LS++ D +VKH ++ +
Sbjct: 1 WYHGKISREEAERLLLNPKPDGTFLVRESE---SKPGD--YTLSVRDDGRVKHYRIQSLD 55
Query: 149 MDGVPQYFLSQSRYFRSIVELI 170
G Y++S F S+ EL+
Sbjct: 56 NGG---YYISGGVTFNSLPELV 74
>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 = 63.2 bits (154), Expect = 3e-13
Identities = 27/82 (32%), Positives = 39/82 (47%), Gaps = 8/82 (9%)
Query: 90 WFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDE-KVKHMKVYEKE 148
WF G + RE+A LL + DGT+L+R P Y LS+++ + KVKH + E
Sbjct: 2 WFHGSISREEAERLLRGKPDGTFLVRESSSEPGD-----YVLSVRSGDGKVKHYLIERNE 56
Query: 149 MDGVPQYFLSQSRYFRSIVELI 170
R F S+ EL+
Sbjct: 57 GGY--YLLGGSGRTFPSLPELV 76
>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 = 55.0 bits (133), Expect = 6e-10
Identities = 36/110 (32%), Positives = 54/110 (49%), Gaps = 9/110 (8%)
Query: 85 LSEYLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKV 144
L E W+ G++ RE+ + DGT+L+R T + Y L+L+ K +K+
Sbjct: 4 LQEAEWYWGDISREEVNEKMRDTPDGTFLVR---DASTMKGD--YTLTLRKGGNNKLIKI 58
Query: 145 YEKEMDGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLPFR 194
+ + DG +Y S F S+VELI Y NSL E L+V+L P
Sbjct: 59 FHR--DG--KYGFSDPLTFNSVVELINYYRNNSLAEYNRKLDVKLLYPVS 104
>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 = 53.1 bits (128), Expect = 3e-09
Identities = 31/94 (32%), Positives = 52/94 (55%), Gaps = 10/94 (10%)
Query: 90 WFVGEM--GREKATSLLEREA---DGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKV 144
WF G++ GR++A LL DGT+L+R + T + Y LS + KV+H ++
Sbjct: 6 WFHGKLGDGRDEAEKLLLEYCEGGDGTFLVR---ESETFVGD--YTLSFWRNGKVQHCRI 60
Query: 145 YEKEMDGVPQYFLSQSRYFRSIVELICCYERNSL 178
++ +G +Y+L+ + F S+ ELI Y +N L
Sbjct: 61 RSRQENGEKKYYLTDNLVFDSLYELIDYYRQNPL 94
>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 = 50.1 bits (120), Expect = 2e-08
Identities = 26/85 (30%), Positives = 47/85 (55%), Gaps = 10/85 (11%)
Query: 90 WFVGEMGREKATSLLEREA-DGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKE 148
WF G++ RE+A ++L + G++L+R + P + Y+LS + +E +KH K+
Sbjct: 2 WFHGKISREEAYNMLVKVGGPGSFLVR---ESDNTPGD--YSLSFRVNEGIKHFKI---I 53
Query: 149 MDGVPQYFLSQSRYFRSIVELICCY 173
G Q+ + RYF S+ ++I Y
Sbjct: 54 PTGNNQFMMG-GRYFSSLDDVIDRY 77
>gnl|CDD|212764 cd11830, SH3_VAV_2, C-terminal (or second) Src homology 3 domain of
VAV proteins. VAV proteins function both as cytoplasmic
guanine nucleotide exchange factors (GEFs) for Rho
GTPases and scaffold proteins and they play important
roles in cell signaling by coupling cell surface
receptors to various effector functions. They play key
roles in processes that require cytoskeletal
reorganization including immune synapse formation,
phagocytosis, cell spreading, and platelet aggregation,
among others. Vertebrates have three VAV proteins (VAV1,
VAV2, and VAV3). VAV proteins contain several domains
that enable their function: N-terminal calponin homology
(CH), acidic, RhoGEF (also called Dbl-homologous or DH),
Pleckstrin Homology (PH), C1 (zinc finger), SH2, and two
SH3 domains. The SH3 domain of VAV is involved in the
localization of proteins to specific sites within the
cell, by interacting with proline-rich sequences within
target proteins. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 49.6 bits (118), Expect = 2e-08
Identities = 21/52 (40%), Positives = 34/52 (65%), Gaps = 1/52 (1%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYFFQLY 248
A A +DFC + +L LK+G V + +K+G+Q GWW+G+I+ R+ +F Y
Sbjct: 1 TAKARYDFCARDMRELSLKEGDVVKIYNKKGQQ-GWWRGEINGRIGWFPSTY 51
>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 = 50.9 bits (122), Expect = 2e-08
Identities = 36/108 (33%), Positives = 52/108 (48%), Gaps = 13/108 (12%)
Query: 87 EYLWFVGEMGREKATSLLEREADGTYLLRIRP-QGPTHPNETIYALSLKTDEKVKHMKVY 145
E W VG++ R +A LL + DGT+L+R QG YA S+ + +VKH +Y
Sbjct: 5 ERTWLVGDINRTQAEELLRGKPDGTFLIRESSTQGC-------YACSVVCNGEVKHCVIY 57
Query: 146 EKEMDGVPQY-FLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLP 192
+ E Y F + S+ EL+ Y NSL ++ L V L P
Sbjct: 58 KTETG----YGFAEPYNLYESLKELVLHYAHNSLEQHNDSLTVTLAYP 101
>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 = 49.3 bits (118), Expect = 5e-08
Identities = 28/93 (30%), Positives = 47/93 (50%), Gaps = 12/93 (12%)
Query: 91 FVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKEMD 150
+ G + RE+A LL +DG+YL+R + + Y LSL+ + KVK+ K+Y D
Sbjct: 9 YHGLISREEAEQLLSGASDGSYLIRESSRDDGY-----YTLSLRFNGKVKNYKLY---YD 60
Query: 151 GVPQYFLSQSRYFRSIVELICCYERNSLIENFI 183
G Y + F +I +L+ + LI ++
Sbjct: 61 GKNHYHYVGEKRFDTIHDLV----ADGLITLYM 89
>gnl|CDD|212909 cd11976, SH3_VAV1_2, C-terminal (or second) Src homology 3 domain
of VAV1 protein. VAV1 is expressed predominantly in the
hematopoietic system and it plays an important role in
the development and activation of B and T cells. It is
activated by tyrosine phosphorylation to function as a
guanine nucleotide exchange factor (GEF) for Rho GTPases
following cell surface receptor activation, triggering
various effects such as cytoskeletal reorganization,
transcription regulation, cell cycle progression, and
calcium mobilization. It also serves as a scaffold
protein and has been shown to interact with Ku70, Socs1,
Janus kinase 2, SIAH2, S100B, Abl gene, ZAP-70, SLP76,
and Syk, among others. VAV proteins contain several
domains that enable their function: N-terminal calponin
homology (CH), acidic, RhoGEF (also called
Dbl-homologous or DH), Pleckstrin Homology (PH), C1
(zinc finger), SH2, and two SH3 domains. The C-terminal
SH3 domain of Vav1 interacts with a wide variety of
proteins including cytoskeletal regulators (zyxin),
RNA-binding proteins (Sam68), transcriptional
regulators, viral proteins, and dynamin 2. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 47.6 bits (113), Expect = 8e-08
Identities = 21/48 (43%), Positives = 34/48 (70%), Gaps = 1/48 (2%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
A A +DFC + ++L LK+G + +L+K+G Q+GWW+G+I RV +F
Sbjct: 1 TAKARYDFCARDRSELSLKEGDIIKILNKKG-QQGWWRGEIYGRVGWF 47
>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 = 48.8 bits (117), Expect = 9e-08
Identities = 29/98 (29%), Positives = 51/98 (52%), Gaps = 14/98 (14%)
Query: 82 HENLSEYLWFVGEMGREKATSLLER-EADGTYLLRIRPQGPTHPNETIYALSLKTDEKVK 140
HE+ WF + RE+A +L R DG +L+R P +A+S + + K+K
Sbjct: 1 HESKE---WFHANLTREQAEEMLMRVPRDGAFLVRPSETDPN-----SFAISFRAEGKIK 52
Query: 141 HMKVYEKEMDGVPQYFLSQSRYFRSIVELICCYERNSL 178
H ++ + +G + F+ + F S+VEL+ YE++ L
Sbjct: 53 HCRI---KQEG--RLFVIGTSQFESLVELVSYYEKHPL 85
>gnl|CDD|212808 cd11875, SH3_CD2AP-like_3, Third Src Homology 3 domain (SH3C) of
CD2-associated protein and similar proteins. This
subfamily is composed of the third SH3 domain (SH3C) of
CD2AP, CIN85 (Cbl-interacting protein of 85 kDa), and
similar domains. CD2AP and CIN85 are adaptor proteins
that bind to protein partners and assemble complexes
that have been implicated in T cell activation, kidney
function, and apoptosis of neuronal cells. They also
associate with endocytic proteins, actin cytoskeleton
components, and other adaptor proteins involved in
receptor tyrosine kinase (RTK) signaling. CD2AP and the
main isoform of CIN85 contain three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CD2AP and CIN85 to
bind various protein partners and assemble complexes
that have been implicated in many different functions.
SH3C of both proteins have been shown to bind to
ubiquitin. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 47.3 bits (113), Expect = 1e-07
Identities = 17/43 (39%), Positives = 28/43 (65%)
Query: 202 FDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
FD+ ++L L++G V +LSK+ E KGWWKG+++ + F
Sbjct: 6 FDYEAENEDELTLREGDIVTILSKDCEDKGWWKGELNGKRGVF 48
>gnl|CDD|212776 cd11842, SH3_Ysc84p_like, Src homology 3 domain of Ysc84p and
similar fungal proteins. This family is composed of the
Saccharomyces cerevisiae proteins, Ysc84p (also called
LAS17-binding protein 4, Lsb4p) and Lsb3p, and similar
fungal proteins. They contain an N-terminal SYLF domain
(also called DUF500) and a C-terminal SH3 domain. Ysc84p
localizes to actin patches and plays an important in
actin polymerization during endocytosis. The N-terminal
domain of both Ysc84p and Lsb3p can bind and bundle
actin filaments. A study of the yeast SH3 domain
interactome predicts that the SH3 domains of Lsb3p and
Lsb4p may function as molecular hubs for the assembly of
endocytic complexes. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 45.9 bits (109), Expect = 3e-07
Identities = 16/47 (34%), Positives = 23/47 (48%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
AVA +DF + L ++G + +L K Q WW G+I R F
Sbjct: 2 AVALYDFAGEQPGDLAFQKGDIITILKKSDSQNDWWTGRIGGREGIF 48
>gnl|CDD|212700 cd11766, SH3_Nck_2, Second Src Homology 3 domain of Nck adaptor
proteins. Nck adaptor proteins regulate actin
cytoskeleton dynamics by linking proline-rich effector
molecules to protein tyrosine kinases and phosphorylated
signaling intermediates. They contain three SH3 domains
and a C-terminal SH2 domain. They function downstream of
the PDGFbeta receptor and are involved in Rho GTPase
signaling and actin dynamics. Vertebrates contain two
Nck adaptor proteins: Nck1 (also called Nckalpha) and
Nck2 (also called Nckbeta or Growth factor
receptor-bound protein 4, Grb4), which show partly
overlapping functions but also bind distinct targets.
Their SH3 domains are involved in recruiting downstream
effector molecules, such as the N-WASP/Arp2/3 complex,
which when activated induces actin polymerization that
results in the production of pedestals, or protrusions
of the plasma membrane. The second SH3 domain of Nck
appears to prefer ligands containing the APxxPxR motif.
SH3 domains are protein interaction domains that usually
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially a PxxP motif. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 45.7 bits (109), Expect = 4e-07
Identities = 16/48 (33%), Positives = 31/48 (64%), Gaps = 2/48 (4%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
AV +F++ ++L L++G +V+VL K + GWW+G+ + +V +F
Sbjct: 1 PAVVKFNYEAQREDELSLRKGDRVLVLEKSSD--GWWRGECNGQVGWF 46
>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 = 47.0 bits (112), Expect = 4e-07
Identities = 35/115 (30%), Positives = 60/115 (52%), Gaps = 19/115 (16%)
Query: 83 ENLSEYLWFVGEMGREKATSLLEREA-DGTYLLRIRPQGPTHPNETIYALSLKT----DE 137
NL +Y W+VG+M R++A SLL++E +G +++R + +Y +SL T
Sbjct: 1 LNLEKYEWYVGDMSRQRAESLLKQEDKEGCFVVR----NSSTKG--LYTVSLFTKVPGSP 54
Query: 138 KVKHMKVYEKEMDGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLP 192
VKH + + +++L++ F +I ELI ++ NS GL RL+ P
Sbjct: 55 HVKHYHIKQNARS---EFYLAEKHCFETIPELINYHQHNS-----GGLATRLKYP 101
>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 = 46.6 bits (111), Expect = 5e-07
Identities = 23/90 (25%), Positives = 48/90 (53%), Gaps = 8/90 (8%)
Query: 88 YLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEK 147
+ W+ G + R A LL +G++L+R P Y++SL+ D +V H ++ +
Sbjct: 3 HSWYHGPISRNAAEYLLSSGINGSFLVRESESSPGQ-----YSISLRYDGRVYHYRI-SE 56
Query: 148 EMDGVPQYFLSQSRYFRSIVELICCYERNS 177
+ DG + +++Q F ++ EL+ + +N+
Sbjct: 57 DSDG--KVYVTQEHRFNTLAELVHHHSKNA 84
>gnl|CDD|212918 cd11985, SH3_Stac2_C, C-terminal Src homology 3 domain of SH3 and
cysteine-rich domain-containing protein 2 (Stac2). Stac
proteins are putative adaptor proteins that contain a
cysteine-rich C1 domain and one or two SH3 domains at
the C-terminus. There are three mammalian members
(Stac1, Stac2, and Stac3) of this family. Stac2 contains
a single SH3 domain at the C-terminus unlike Stac1 and
Stac3, which contain two C-terminal SH3 domains. Stac1
and Stac2 have been found to be expressed differently in
mature dorsal root ganglia (DRG) neurons. Stac1 is
mainly expressed in peptidergic neurons while Stac2 is
found in a subset of nonpeptidergic and all trkB+
neurons. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 45.3 bits (107), Expect = 5e-07
Identities = 21/46 (45%), Positives = 28/46 (60%), Gaps = 2/46 (4%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
VA + F P E N LPL+ G +V+V+ E WWKGK +RV +F
Sbjct: 3 VALYKFLPQENNDLPLQPGDRVMVVDDSNED--WWKGKSGDRVGFF 46
>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 = 46.3 bits (110), Expect = 7e-07
Identities = 32/90 (35%), Positives = 47/90 (52%), Gaps = 9/90 (10%)
Query: 90 WFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKEM 149
W+ G + R +A SLL +G+YL+R + + Y+LSLK+ + HM++ E
Sbjct: 3 WYHGAITRIEAESLLRPCKEGSYLVR---NSESTKQD--YSLSLKSAKGFMHMRIQRNET 57
Query: 150 DGVPQYFLSQ-SRYFRSIVELICCYERNSL 178
QY L Q SR F +I E+I Y N L
Sbjct: 58 G---QYILGQFSRPFETIPEMIRHYCLNKL 84
>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 = 46.0 bits (110), Expect = 8e-07
Identities = 30/110 (27%), Positives = 54/110 (49%), Gaps = 20/110 (18%)
Query: 90 WFVGEMGREKATSLL--EREADGTYLLRIRPQGPTHPNETIYALSLKTDEK-----VKHM 142
WF G++ R+ A LL GT+L+R + T P Y+LS++ + VKH
Sbjct: 5 WFFGKIKRKDAEKLLLAPGNPRGTFLIR---ESETTPGA--YSLSVRDGDDARGDTVKHY 59
Query: 143 KVYEKEMDGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLP 192
++ + + G Y+++ F ++ EL+ Y +++ GL RL +P
Sbjct: 60 RIRKLDNGG---YYITTRATFPTLQELVQHYSKDAD-----GLCCRLTVP 101
>gnl|CDD|198185 cd09931, SH2_C-SH2_SHP_like, C-terminal Src homology 2 (C-SH2)
domain found in SH2 domain Phosphatases (SHP) proteins.
The SH2 domain phosphatases (SHP-1, SHP-2/Syp,
Drosophila corkscrew (csw), and Caenorhabditis elegans
Protein Tyrosine Phosphatase (Ptp-2)) are cytoplasmic
signaling enzymes. They are both targeted and regulated
by interactions of their SH2 domains with
phosphotyrosine docking sites. These proteins contain
two SH2 domains (N-SH2, C-SH2) followed by a tyrosine
phosphatase (PTP) domain, and a C-terminal extension.
Shp1 and Shp2 have two tyrosyl phosphorylation sites in
their C-tails, which are phosphorylated differentially
by receptor and nonreceptor PTKs. Csw retains the
proximal tyrosine and Ptp-2 lacks both sites.
Shp-binding proteins include receptors, scaffolding
adapters, and inhibitory receptors. Some of these bind
both Shp1 and Shp2 while others bind only one. Most
proteins that bind a Shp SH2 domain contain one or more
immuno-receptor tyrosine-based inhibitory motifs
(ITIMs): [SIVL]xpYxx[IVL]. Shp1 N-SH2 domain blocks the
catalytic domain and keeps the enzyme in the inactive
conformation, and is thus believed to regulate the
phosphatase activity of SHP-1. Its C-SH2 domain is
thought to be involved in searching for phosphotyrosine
activators. The SHP2 N-SH2 domain is a conformational
switch; it either binds and inhibits the phosphatase, or
it binds phosphoproteins and activates the enzyme. The
C-SH2 domain contributes binding energy and specificity,
but it does not have a direct role in activation. Csw
SH2 domain function is essential, but either SH2 domain
can fulfill this requirement. The role of the csw SH2
domains during Sevenless receptor tyrosine kinase (SEV)
signaling is to bind Daughter of Sevenless rather than
activated SEV. Ptp-2 acts in oocytes downstream of
sheath/oocyte gap junctions to promote major sperm
protein (MSP)-induced MAP Kinase (MPK-1)
phosphorylation. Ptp-2 functions in the oocyte
cytoplasm, not at the cell surface to inhibit multiple
RasGAPs, resulting in sustained Ras activation. It is
thought that MSP triggers PTP-2/Ras activation and ROS
production to stimulate MPK-1 activity essential for
oocyte maturation and that secreted MSP domains and
Cu/Zn superoxide dismutases function antagonistically to
control ROS and MAPK signaling. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 99
Score = 46.1 bits (110), Expect = 9e-07
Identities = 30/106 (28%), Positives = 56/106 (52%), Gaps = 12/106 (11%)
Query: 90 WFVGEM-GREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDE-KVKHMKVYEK 147
WF G + G+E LLE+ G++L+R + + P + + LS++TD+ KV H+ + +
Sbjct: 2 WFHGHLSGKEAEKLLLEKGKPGSFLVR---ESQSKPGD--FVLSVRTDDDKVTHIMIRCQ 56
Query: 148 EMDGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLPF 193
+Y + F S+ +L+ Y++N ++E G V L+ P
Sbjct: 57 GG----KYDVGGGEEFDSLTDLVEHYKKNPMVE-TSGTVVHLKQPL 97
>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 = 44.0 bits (105), Expect = 2e-06
Identities = 15/49 (30%), Positives = 27/49 (55%), Gaps = 3/49 (6%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKI-DERVSYF 244
A A +D+ + ++L K+G + VL K+ + GWW+G++ R F
Sbjct: 1 YARALYDYEAQDDDELSFKKGDIITVLEKDDD--GWWEGELNGGREGLF 47
>gnl|CDD|212910 cd11977, SH3_VAV2_2, C-terminal (or second) Src homology 3 domain
of VAV2 protein. VAV2 is widely expressed and functions
as a guanine nucleotide exchange factor (GEF) for RhoA,
RhoB and RhoG and also activates Rac1 and Cdc42. It is
implicated in many cellular and physiological functions
including blood pressure control, eye development,
neurite outgrowth and branching, EGFR endocytosis and
degradation, and cell cluster morphology, among others.
It has been reported to associate with Nek3. VAV
proteins contain several domains that enable their
function: N-terminal calponin homology (CH), acidic,
RhoGEF (also called Dbl-homologous or DH), Pleckstrin
Homology (PH), C1 (zinc finger), SH2, and two SH3
domains. The SH3 domain of VAV is involved in the
localization of proteins to specific sites within the
cell, by interacting with proline-rich sequences within
target proteins. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 58
Score = 44.2 bits (104), Expect = 2e-06
Identities = 18/51 (35%), Positives = 31/51 (60%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYFFQLY 248
AVA ++F + +L L++G V + S+ G +GWWKG+ + R+ +F Y
Sbjct: 3 AVARYNFAARDMRELSLREGDVVRIYSRIGGDQGWWKGETNGRIGWFPSTY 53
>gnl|CDD|212775 cd11841, SH3_SH3YL1_like, Src homology 3 domain of SH3 domain
containing Ysc84-like 1 (SH3YL1) protein. SH3YL1
localizes to the plasma membrane and is required for
dorsal ruffle formation. It binds phosphoinositides
(PIs) with high affinity through its N-terminal SYLF
domain (also called DUF500). In addition, SH3YL1
contains a C-terminal SH3 domain which has been reported
to bind to N-WASP, dynamin 2, and SHIP2 (a PI
5-phosphatase). SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 43.5 bits (103), Expect = 2e-06
Identities = 13/48 (27%), Positives = 23/48 (47%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
A + F + L + G ++ VL++ Q WW+G++ RV F
Sbjct: 1 EVTALYSFEGQQPCDLSFQAGDRITVLTRTDSQFDWWEGRLRGRVGIF 48
>gnl|CDD|212992 cd12059, SH3_MLK1-3, Src Homology 3 domain of Mixed Lineage Kinases
1, 2, and 3. MLKs 1, 2, and 3 are Serine/Threonine
Kinases (STKs), catalyzing the transfer of the
gamma-phosphoryl group from ATP to S/T residues on
protein substrates. MLKs act as mitogen-activated
protein kinase kinase kinases (MAP3Ks, MKKKs, MAPKKKs),
which phosphorylate and activate MAPK kinases (MAPKKs or
MKKs or MAP2Ks), which in turn phosphorylate and
activate MAPKs during signaling cascades that are
important in mediating cellular responses to
extracellular signals. MLKs play roles in immunity and
inflammation, as well as in cell death, proliferation,
and cell cycle regulation. Little is known about the
specific function of MLK1, also called MAP3K9. It is
capable of activating the c-Jun N-terminal kinase
pathway. Mice lacking both MLK1 and MLK2 are viable,
fertile, and have normal life spans. MLK2, also called
MAP3K10, is abundant in brain, skeletal muscle, and
testis. It functions upstream of the MAPK, c-Jun
N-terminal kinase. It binds hippocalcin, a
calcium-sensor protein that protects neurons against
calcium-induced cell death. Both MLK2 and hippocalcin
may be associated with the pathogenesis of Parkinson's
disease. MLK3, also called MAP3K11, is highly expressed
in breast cancer cells and its signaling through c-Jun
N-terminal kinase has been implicated in the migration,
invasion, and malignancy of cancer cells. It also
functions as a negative regulator of Inhibitor of
Nuclear Factor-KappaB Kinase (IKK) and thus, impacts
inflammation and immunity. MLKs contain an SH3 domain, a
catalytic kinase domain, a leucine zipper, a
proline-rich region, and a CRIB domain that mediates
binding to GTP-bound Cdc42 and Rac. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 43.6 bits (103), Expect = 2e-06
Identities = 20/48 (41%), Positives = 31/48 (64%), Gaps = 3/48 (6%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGE---QKGWWKGKIDERVSYF 244
A FD+ + ++L L++G +V VLSK+ +GWW GKI++RV F
Sbjct: 4 AVFDYEASAEDELTLRRGDRVEVLSKDSAVSGDEGWWTGKINDRVGIF 51
>gnl|CDD|212911 cd11978, SH3_VAV3_2, C-terminal (or second) Src homology 3 domain
of VAV3 protein. VAV3 is ubiquitously expressed and
functions as a phosphorylation-dependent guanine
nucleotide exchange factor (GEF) for RhoA, RhoG, and
Rac1. It has been implicated to function in the
hematopoietic, bone, cerebellar, and cardiovascular
systems. VAV3 is essential in axon guidance in neurons
that control blood pressure and respiration. It is
overexpressed in prostate cancer cells and it plays a
role in regulating androgen receptor transcriptional
activity. VAV proteins contain several domains that
enable their function: N-terminal calponin homology
(CH), acidic, RhoGEF (also called Dbl-homologous or DH),
Pleckstrin Homology (PH), C1 (zinc finger), SH2, and two
SH3 domains. The SH3 domain of VAV is involved in the
localization of proteins to specific sites within the
cell, by interacting with proline-rich sequences within
target proteins. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 43.5 bits (102), Expect = 3e-06
Identities = 19/52 (36%), Positives = 31/52 (59%), Gaps = 1/52 (1%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYFFQLY 248
IA+A +DFC + +L L +G V + +K GWW+G+++ RV +F Y
Sbjct: 2 IAIARYDFCARDMRELSLLKGDVVKIYTKMSTN-GWWRGEVNGRVGWFPSTY 52
>gnl|CDD|212767 cd11833, SH3_Stac_1, First C-terminal Src homology 3 domain of SH3
and cysteine-rich domain-containing (Stac) proteins.
Stac proteins are putative adaptor proteins that contain
a cysteine-rich C1 domain and one or two SH3 domains at
the C-terminus. There are three mammalian members
(Stac1, Stac2, and Stac3) of this family. Stac1 and
Stac3 contain two SH3 domains while Stac2 contains a
single SH3 domain at the C-terminus. This model
represents the first C-terminal SH3 domain of Stac1 and
Stac3, and the single C-terminal SH3 domain of Stac2.
Stac1 and Stac2 have been found to be expressed
differently in mature dorsal root ganglia (DRG) neurons.
Stac1 is mainly expressed in peptidergic neurons while
Stac2 is found in a subset of nonpeptidergic and all
trkB+ neurons. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 42.1 bits (99), Expect = 8e-06
Identities = 18/46 (39%), Positives = 27/46 (58%), Gaps = 2/46 (4%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
VA + F P E L ++ G ++ +L E WWKGKI++RV +F
Sbjct: 3 VALYKFKPQENEDLEMRPGDKITLLDDSNED--WWKGKIEDRVGFF 46
>gnl|CDD|213018 cd12142, SH3_D21-like, Src Homology 3 domain of SH3
domain-containing protein 21 (SH3D21) and similar
proteins. N-terminal SH3 domain of the uncharacterized
protein SH3 domain-containing protein 21, and similar
uncharacterized domains, it belongs to the CD2AP-like_3
subfamily of proteins. The CD2AP-like_3 subfamily is
composed of the third SH3 domain (SH3C) of CD2AP, CIN85
(Cbl-interacting protein of 85 kDa), and similar
domains. CD2AP and CIN85 are adaptor proteins that bind
to protein partners and assemble complexes that have
been implicated in T cell activation, kidney function,
and apoptosis of neuronal cells. They also associate
with endocytic proteins, actin cytoskeleton components,
and other adaptor proteins involved in receptor tyrosine
kinase (RTK) signaling. CD2AP and the main isoform of
CIN85 contain three SH3 domains, a proline-rich region,
and a C-terminal coiled-coil domain. All of these
domains enable CD2AP and CIN85 to bind various protein
partners and assemble complexes that have been
implicated in many different functions. SH3C of both
proteins have been shown to bind to ubiquitin. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 42.1 bits (99), Expect = 8e-06
Identities = 18/43 (41%), Positives = 30/43 (69%)
Query: 202 FDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
FD+ P ++L LK+G + V+SKE E +GWW+G+++ R +F
Sbjct: 6 FDYNPVAPDELALKKGDVIEVISKETEDEGWWEGELNGRRGFF 48
>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 = 41.8 bits (99), Expect = 8e-06
Identities = 16/38 (42%), Positives = 24/38 (63%), Gaps = 2/38 (5%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGK 236
VA +D+ E ++L K+G +IVL K + GWWKG+
Sbjct: 1 VALYDYTAREPDELSFKKGDIIIVLEKSDD--GWWKGR 36
>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 = 41.9 bits (99), Expect = 8e-06
Identities = 18/46 (39%), Positives = 23/46 (50%), Gaps = 2/46 (4%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVS 242
+ VA +DF P NQL K G + VL+K + GWW G I
Sbjct: 1 VVVALYDFTPKSKNQLSFKAGDIIYVLNK--DPSGWWDGVIISSSG 44
>gnl|CDD|198262 cd10399, SH2_Tec_Bmx, Src homology 2 (SH2) domain found in Tec
protein, Bmx. A member of the Tec protein tyrosine
kinase Bmx is expressed in the endothelium of large
arteries, fetal endocardium, adult endocardium of the
left ventricle, bone marrow, lung, testis, granulocytes,
myeloid cell lines, and prostate cell lines. Bmx is
involved in the regulation of Rho and serum response
factor (SRF). Bmx has been shown to interact with PAK1,
PTK2, PTPN21, and RUFY1. Most of the Tec family members
have a PH domain (Txk and the short (type 1) splice
variant of Drosophila Btk29A are exceptions), a Tec
homology (TH) domain, a SH3 domain, a SH2 domain, and a
protein kinase catalytic domain. The TH domain consists
of a Zn2+-binding Btk motif and a proline-rich region.
The Btk motif is found in Tec kinases, Ras GAP, and
IGBP. It is crucial for the function of Tec PH domains.
It is not present in Txk and the type 1 splice form of
the Drosophila homolog. The proline-rich regions are
highly conserved for the most part with the exception of
Bmx whose residues surrounding the PXXP motif are not
conserved (TH-like) and Btk29A which is entirely unique
with large numbers of glycine residues (TH-extended).
Tec family members all lack a C-terminal tyrosine having
an autoinhibitory function in its phosphorylated state.
In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 106
Score = 43.0 bits (101), Expect = 1e-05
Identities = 26/96 (27%), Positives = 49/96 (51%), Gaps = 4/96 (4%)
Query: 83 ENLSEYLWFVGEMGREKATSLL-EREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKH 141
ENL Y WF G + R ++ LL ++ +G +++R Q + T+ S ++K
Sbjct: 1 ENLDAYDWFAGNISRSQSEQLLRQKGKEGAFMVRNSSQVGMY---TVSLFSKAVNDKKGT 57
Query: 142 MKVYEKEMDGVPQYFLSQSRYFRSIVELICCYERNS 177
+K Y + + +L+++ F SI +LI ++ NS
Sbjct: 58 VKHYHVHTNAENKLYLAENYCFDSIPKLIHYHQHNS 93
>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 = 41.0 bits (97), Expect = 2e-05
Identities = 14/48 (29%), Positives = 25/48 (52%), Gaps = 3/48 (6%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKI-DERVSYF 244
A +D+ + ++L K+G + VL K + GWWKG++ + F
Sbjct: 5 VRALYDYTAQDPDELSFKKGDIITVLEKSDD--GWWKGRLGRGKEGLF 50
>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 = 41.9 bits (99), Expect = 2e-05
Identities = 28/103 (27%), Positives = 53/103 (51%), Gaps = 14/103 (13%)
Query: 90 WFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKEM 149
WF G++ RE+A LL+ DG +L+R + +P + Y L + + KV+H +V +
Sbjct: 5 WFHGKISREEAERLLQPPEDGLFLVR---ESTNYPGD--YTLCVSFEGKVEHYRVIYRN- 58
Query: 150 DGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLP 192
+ + + YF ++++L+ Y +++ GL RL P
Sbjct: 59 ---GKLTIDEEEYFENLIQLVEHYTKDA-----DGLCTRLVKP 93
>gnl|CDD|198224 cd10361, SH2_Fps_family, Src homology 2 (SH2) domain found in
feline sarcoma, Fujinami poultry sarcoma, and
fes-related (Fes/Fps/Fer) proteins. The Fps family
consists of members Fps/Fes and Fer/Flk/Tyk3. They are
cytoplasmic protein-tyrosine kinases implicated in
signaling downstream from cytokines, growth factors and
immune receptors. Fes/Fps/Fer contains three
coiled-coil regions, an SH2 (Src-homology-2) and a TK
(tyrosine kinase catalytic) domain signature. Members
here include: Fps/Fes, Fer, Kin-31, and In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 90
Score = 41.7 bits (99), Expect = 3e-05
Identities = 26/96 (27%), Positives = 48/96 (50%), Gaps = 8/96 (8%)
Query: 83 ENLSEYLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHM 142
++L ++ G + RE A LL+ DG +L+R + LS++ D K++H
Sbjct: 1 KDLENEPYYHGLLPREDAEELLKN--DGDFLVRKTEPKGGGKRK--LVLSVRWDGKIRHF 56
Query: 143 KVYEKEMDGVPQYFLSQSRYFRSIVELICCYERNSL 178
+ DG +Y++ + + F+SI ELI Y++
Sbjct: 57 VI--NRDDGG-KYYI-EGKSFKSISELINYYQKTKE 88
>gnl|CDD|198260 cd10397, SH2_Tec_Btk, Src homology 2 (SH2) domain found in Tec
protein, Bruton's tyrosine kinase (Btk). A member of
the Tec protein tyrosine kinase Btk is expressed in bone
marrow, spleen, all hematopoietic cells except T
lymphocytes and plasma cells where it plays a crucial
role in B cell maturation and mast cell activation. Btk
has been shown to interact with GNAQ, PLCG2, protein
kinase D1, B-cell linker, SH3BP5, caveolin 1, ARID3A,
and GTF2I. Most of the Tec family members have a PH
domain (Txk and the short (type 1) splice variant of
Drosophila Btk29A are exceptions), a Tec homology (TH)
domain, a SH3 domain, a SH2 domain, and a protein kinase
catalytic domain. Btk is implicated in the primary
immunodeficiency disease X-linked agammaglobulinemia
(Bruton's agammaglobulinemia). The TH domain consists
of a Zn2+-binding Btk motif and a proline-rich region.
The Btk motif is found in Tec kinases, Ras GAP, and
IGBP. It is crucial for the function of Tec PH domains
and it's lack of presence in Txk is not surprising since
it lacks a PH domain. The type 1 splice form of the
Drosophila homolog also lacks both the PH domain and the
Btk motif. The proline-rich regions are highly
conserved for the most part with the exception of Bmx
whose residues surrounding the PXXP motif are not
conserved (TH-like) and Btk29A which is entirely unique
with large numbers of glycine residues (TH-extended).
Tec family members all lack a C-terminal tyrosine having
an autoinhibitory function in its phosphorylated state.
Two tyrosine phosphorylation (pY) sites have been
identified in Btk: one located in the activation loop of
the catalytic domain which regulates the transition
between open (active) and closed (inactive) states and
the other in its SH3 domain. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 106
Score = 41.7 bits (98), Expect = 4e-05
Identities = 29/110 (26%), Positives = 52/110 (47%), Gaps = 11/110 (10%)
Query: 85 LSEYLWFVGEMGREKATSLLEREA-DGTYLLRIRPQGPTHPNETIYALSLKTDE-KVKHM 142
L Y W+ M R +A LL++E +G +++R + +++A S + ++H
Sbjct: 3 LEMYEWYSKNMTRSQAEQLLKQEGKEGGFIVRDSSK-AGKYTVSVFAKSAGDPQGVIRHY 61
Query: 143 KVYEKEMDGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLP 192
V QY+L++ F +I ELI ++ N+ GL RL+ P
Sbjct: 62 VVCSTPQS---QYYLAEKHLFSTIPELINYHQHNA-----AGLISRLKYP 103
>gnl|CDD|198259 cd10396, SH2_Tec_Itk, Src homology 2 (SH2) domain found in Tec
protein, IL2-inducible T-cell kinase (Itk). A member of
the Tec protein tyrosine kinase Itk is expressed thymus,
spleen, lymph node, T lymphocytes, NK and mast cells. It
plays a role in T-cell proliferation and
differentiation, analogous to Tec family kinases Txk.
Itk has been shown to interact with Fyn,
Wiskott-Aldrich syndrome protein, KHDRBS1, PLCG1,
Lymphocyte cytosolic protein 2, Linker of activated T
cells, Karyopherin alpha 2, Grb2, and Peptidylprolyl
isomerase A. Most of the Tec family members have a PH
domain (Txk and the short (type 1) splice variant of
Drosophila Btk29A are exceptions), a Tec homology (TH)
domain, a SH3 domain, a SH2 domain, and a protein kinase
catalytic domain. The TH domain consists of a
Zn2+-binding Btk motif and a proline-rich region. The
Btk motif is found in Tec kinases, Ras GAP, and IGBP. It
is crucial for the function of Tec PH domains and it's
lack of presence in Txk is not surprising since it lacks
a PH domain. The type 1 splice form of the Drosophila
homolog also lacks both the PH domain and the Btk motif.
The proline-rich regions are highly conserved for the
most part with the exception of Bmx whose residues
surrounding the PXXP motif are not conserved (TH-like)
and Btk29A which is entirely unique with large numbers
of glycine residues (TH-extended). Tec family members
all lack a C-terminal tyrosine having an autoinhibitory
function in its phosphorylated state. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 108
Score = 41.3 bits (97), Expect = 4e-05
Identities = 35/119 (29%), Positives = 56/119 (47%), Gaps = 21/119 (17%)
Query: 83 ENLSEYLWFVGEMGREKATSLLEREA-DGTYLLRIRPQGPTHPNETIYALSLKT------ 135
NL +Y W+ + R KA LL E +G +++R Q Y +SL T
Sbjct: 1 NNLDQYEWYNKNINRSKAEKLLRDEGKEGGFMVRDSSQPGL------YTVSLYTKAGGEG 54
Query: 136 DEKVKHMKVYEKEMDGVP-QYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLPF 193
+ ++H + KE + P +Y+L++ F SI ELI ++ N+ GL RL+ P
Sbjct: 55 NPCIRHYHI--KETNDSPKKYYLAEKHVFNSIPELIEYHKHNA-----AGLVTRLRYPV 106
>gnl|CDD|198261 cd10398, SH2_Tec_Txk, Src homology 2 (SH2) domain found in Tec
protein, Txk. A member of the Tec protein tyrosine
kinase Txk is expressed in thymus, spleen, lymph node, T
lymphocytes, NK cells, mast cell lines, and myeloid cell
line. Txk plays a role in TCR signal transduction, T
cell development, and selection which is analogous to
the function of Itk. Txk has been shown to interact with
IFN-gamma. Unlike most of the Tec family members Txk
lacks a PH domain. Instead Txk has a unique region
containing a palmitoylated cysteine string which has a
similar membrane tethering function as the PH domain.
Txk also has a zinc-binding motif, a SH3 domain, a SH2
domain, and a protein kinase catalytic domain. The TH
domain consists of a Zn2+-binding Btk motif and a
proline-rich region. The Btk motif is found in Tec
kinases, Ras GAP, and IGBP and crucial to the function
of the PH domain. It is not present in Txk which is not
surprising since it lacks a PH domain. The type 1 splice
form of the Drosophila homolog also lacks both the PH
domain and the Btk motif. The proline-rich regions are
highly conserved for the most part with the exception of
Bmx whose residues surrounding the PXXP motif are not
conserved (TH-like) and Btk29A which is entirely unique
with large numbers of glycine residues (TH-extended).
Tec family members all lack a C-terminal tyrosine having
an autoinhibitory function in its phosphorylated state.
In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 106
Score = 41.1 bits (96), Expect = 6e-05
Identities = 31/116 (26%), Positives = 57/116 (49%), Gaps = 17/116 (14%)
Query: 84 NLSEYLWFVGEMGREKATSLLEREA-DGTYLLR-IRPQGPTHPNETIYALSLKTDEKVKH 141
NL Y W+ + R +A LL +E+ +G +++R R G Y +S+ T +
Sbjct: 2 NLEIYEWYHKNITRNQAERLLRQESKEGAFIVRDSRHLG-------SYTISVFTRARRST 54
Query: 142 ---MKVYEKEMDGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLPFR 194
+K Y+ + + Q+++++ F+SI ELI ++ N+ GL RL+ P
Sbjct: 55 EASIKHYQIKKNDSGQWYVAERHLFQSIPELIQYHQHNA-----AGLMSRLRYPVG 105
>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 = 40.4 bits (94), Expect = 1e-04
Identities = 25/93 (26%), Positives = 48/93 (51%), Gaps = 12/93 (12%)
Query: 89 LWFVGEMGREKATSLLEREA--DGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYE 146
WF G + RE++ +++++ DG +LLR + N + L+L +K+K+ ++
Sbjct: 6 HWFHGRISREESHRIIKQQGLVDGLFLLR-----DSQSNPKAFVLTLCHHQKIKNFQILP 60
Query: 147 KEMDGVPQYFLS---QSRYFRSIVELICCYERN 176
E DG Q F S + F +++L+ Y+ N
Sbjct: 61 CEDDG--QTFFSLDDGNTKFSDLIQLVDFYQLN 91
>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 = 39.8 bits (93), Expect = 1e-04
Identities = 28/93 (30%), Positives = 48/93 (51%), Gaps = 11/93 (11%)
Query: 90 WFVGEMGREKA-TSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKE 148
W+ G + R +A T L E +G +L+R ++P + Y++SLK + KH KV
Sbjct: 3 WYYGRITRHQAETLLNEHGHEGDFLIR---DSESNPGD--YSVSLKAPGRNKHFKVQVV- 56
Query: 149 MDGVPQYFLSQSRYFRSIVELICCYERNSLIEN 181
D V Y + Q R F ++ EL+ Y++ + +
Sbjct: 57 -DNV--YCIGQ-RKFHTMDELVEHYKKAPIFTS 85
>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 = 39.4 bits (92), Expect = 2e-04
Identities = 20/71 (28%), Positives = 33/71 (46%), Gaps = 6/71 (8%)
Query: 85 LSEYLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKV 144
L WF G++ R++A L +GT+L+R+ T P +T + +S K K H ++
Sbjct: 7 LLAKSWFHGDISRDEAEKRLRGRPEGTFLIRL---SSTDPKKTPFTISKKKKSKPVHKRI 63
Query: 145 YEKEMDGVPQY 155
V Y
Sbjct: 64 ---SRIDVNNY 71
>gnl|CDD|212739 cd11805, SH3_GRB2_like_C, C-terminal Src homology 3 domain of
Growth factor receptor-bound protein 2 (GRB2) and
related proteins. This family includes the adaptor
protein GRB2 and related proteins including Drosophila
melanogaster Downstream of receptor kinase (DRK),
Caenorhabditis elegans Sex muscle abnormal protein 5
(Sem-5), GRB2-related adaptor protein (GRAP), GRAP2, and
similar proteins. Family members contain an N-terminal
SH3 domain, a central SH2 domain, and a C-terminal SH3
domain. GRB2/Sem-5/DRK is a critical signaling molecule
that regulates the Ras pathway by linking tyrosine
kinases to the Ras guanine nucleotide releasing protein
Sos (son of sevenless), which converts Ras to the active
GTP-bound state. GRAP2 plays an important role in T cell
receptor (TCR) signaling by promoting the formation of
the SLP-76:LAT complex, which couples the TCR to the Ras
pathway. GRAP acts as a negative regulator of T cell
receptor (TCR)-induced lymphocyte proliferation by
downregulating the signaling to the Ras/ERK pathway. The
C-terminal SH3 domains (SH3c) of GRB2 and GRAP2 have
been shown to bind to classical PxxP motif ligands, as
well as to non-classical motifs. GRB2 SH3c binds Gab2
(Grb2-associated binder 2) through epitopes containing
RxxK motifs, while the SH3c of GRAP2 binds to the
phosphatase-like protein HD-PTP via a RxxxxK motif. SH3
domains are protein interaction domains that typically
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 38.4 bits (90), Expect = 2e-04
Identities = 16/45 (35%), Positives = 23/45 (51%), Gaps = 2/45 (4%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
A +DF P E +L ++G + VL WWKG++ RV F
Sbjct: 4 ALYDFNPQEPGELEFRRGDIITVLDSSDPD--WWKGELRGRVGIF 46
>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 = 38.9 bits (91), Expect = 3e-04
Identities = 23/91 (25%), Positives = 43/91 (47%), Gaps = 11/91 (12%)
Query: 83 ENLSEYLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHM 142
L + W+ G M E A +L + DG++L+R + I++LS ++ V H
Sbjct: 5 RELKDCGWYWGPMSWEDAEKVLSNKPDGSFLVR-DSSDDRY----IFSLSFRSQGSVHHT 59
Query: 143 KVYEKEMD---GVPQYFLSQSRYFRSIVELI 170
++ + + G F+ +S +S+VE I
Sbjct: 60 RIEQYQGTFSLGSRNKFVDRS---QSLVEFI 87
>gnl|CDD|212809 cd11876, SH3_MLK, Src Homology 3 domain of Mixed Lineage Kinases.
MLKs are Serine/Threonine Kinases (STKs), catalyzing the
transfer of the gamma-phosphoryl group from ATP to S/T
residues on protein substrates. MLKs act as
mitogen-activated protein kinase kinase kinases (MAP3Ks,
MKKKs, MAPKKKs), which phosphorylate and activate MAPK
kinases (MAPKKs or MKKs or MAP2Ks), which in turn
phosphorylate and activate MAPKs during signaling
cascades that are important in mediating cellular
responses to extracellular signals. MLKs play roles in
immunity and inflammation, as well as in cell death,
proliferation, and cell cycle regulation. Mammals have
four MLKs (MLK1-4), mostly conserved in vertebrates,
which contain an SH3 domain, a catalytic kinase domain,
a leucine zipper, a proline-rich region, and a CRIB
domain that mediates binding to GTP-bound Cdc42 and Rac.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 37.9 bits (88), Expect = 3e-04
Identities = 19/49 (38%), Positives = 28/49 (57%), Gaps = 3/49 (6%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGE---QKGWWKGKIDERVSYF 244
A FD+ ++L L++G V VLSK+ +GWW GKI ++V F
Sbjct: 3 TALFDYDARGEDELTLRRGQPVEVLSKDAAVSGDEGWWTGKIGDKVGIF 51
>gnl|CDD|212884 cd11951, SH3_GRAP_C, C-terminal Src homology 3 domain of
GRB2-related adaptor protein. GRAP is a GRB-2 like
adaptor protein that is highly expressed in lymphoid
tissues. It acts as a negative regulator of T cell
receptor (TCR)-induced lymphocyte proliferation by
downregulating the signaling to the Ras/ERK pathway. It
has been identified as a regulator of TGFbeta signaling
in diabetic kidney tubules and may have a role in the
pathogenesis of the disease. GRAP contains an N-terminal
SH3 domain, a central SH2 domain, and a C-terminal SH3
domain. The C-terminal SH3 domains (SH3c) of the related
proteins, GRB2 and GRAP2, have been shown to bind to
classical PxxP motif ligands, as well as to
non-classical motifs. GRB2 SH3c binds Gab2
(Grb2-associated binder 2) through epitopes containing
RxxK motifs, while the SH3c of GRAP2 binds to the
phosphatase-like protein HD-PTP via a RxxxxK motif. SH3
domains are protein interaction domains that typically
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 37.5 bits (87), Expect = 3e-04
Identities = 16/49 (32%), Positives = 28/49 (57%), Gaps = 2/49 (4%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYFFQLY 248
A++DF + +QL ++G + VL + WW+G+I RV +F + Y
Sbjct: 4 AQYDFSAEDPSQLSFRRGDIIEVL--DCPDPNWWRGRISGRVGFFPRNY 50
>gnl|CDD|212705 cd11771, SH3_Pex13p_fungal, Src Homology 3 domain of fungal
peroxisomal membrane protein Pex13p. Pex13p, located in
the peroxisomal membrane, contains two transmembrane
regions and a C-terminal SH3 domain. It binds to the
peroxisomal targeting type I (PTS1) receptor Pex5p and
the docking factor Pex14p through its SH3 domain. It is
essential for both PTS1 and PTS2 protein import pathways
into the peroxisomal matrix. Pex13p binds Pex14p, which
contains a PxxP motif, in a classical fashion to the
proline-rich ligand binding site of its SH3 domain. It
binds the WxxxF/Y motif of Pex5p in a novel site that
does not compete with Pex14p binding. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 60
Score = 37.6 bits (88), Expect = 3e-04
Identities = 21/50 (42%), Positives = 27/50 (54%), Gaps = 5/50 (10%)
Query: 200 AEFDFCP-TEANQLPLKQGCQVIVLSK---EGEQKGWWKGKI-DERVSYF 244
A +DF P +L LK+G V VLSK G WWKG+ D R+ +F
Sbjct: 4 ALYDFTPENPEMELSLKKGDIVAVLSKTDPLGRDSEWWKGRTRDGRIGWF 53
>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 = 38.6 bits (90), Expect = 3e-04
Identities = 28/105 (26%), Positives = 53/105 (50%), Gaps = 15/105 (14%)
Query: 90 WFVGEMGREKATS--LLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEK 147
W+ G++ R +A LL G +L+R + Y+LS++ + VKH ++ +
Sbjct: 5 WYFGKIKRIEAEKKLLLPENEHGAFLIR-----DSESRHNDYSLSVRDGDTVKHYRIRQL 59
Query: 148 EMDGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLP 192
+ G +F+++ FR++ EL+ Y ++S GL V L+ P
Sbjct: 60 DEGG---FFIARRTTFRTLQELVEHYSKDS-----DGLCVNLRKP 96
>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 = 38.7 bits (90), Expect = 3e-04
Identities = 26/105 (24%), Positives = 45/105 (42%), Gaps = 15/105 (14%)
Query: 90 WFVGEMGREKATS--LLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEK 147
WF G + R A L G +L+R + + ++LS+ VKH ++
Sbjct: 5 WFFGAIKRADAEKQLLYSENQTGAFLIR-----ESESQKGEFSLSVLDGGVVKHYRIRRL 59
Query: 148 EMDGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGLNVRLQLP 192
+ G +FL++ + F ++ E + Y S GL V+L P
Sbjct: 60 DEGG---FFLTRRKTFSTLNEFVNYYTTTS-----DGLCVKLGKP 96
>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 = 38.5 bits (89), Expect = 4e-04
Identities = 30/87 (34%), Positives = 48/87 (55%), Gaps = 11/87 (12%)
Query: 90 WFVGEMGREKA-TSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKE 148
W+ G++ R +A +L ER +G +L+R + PN+ +++SLK K KH KV KE
Sbjct: 3 WYYGKVTRHQAEMALNERGNEGDFLIR---DSESSPND--FSVSLKAQGKNKHFKVQLKE 57
Query: 149 MDGVPQYFLSQSRYFRSIVELICCYER 175
Y + Q R F S+ EL+ Y++
Sbjct: 58 C----VYCIGQ-RKFSSMEELVEHYKK 79
>gnl|CDD|212702 cd11768, SH3_Tec_like, Src Homology 3 domain of Tec-like Protein
Tyrosine Kinases. The Tec (Tyrosine kinase expressed in
hepatocellular carcinoma) subfamily is composed of Tec,
Btk, Bmx (Etk), Itk (Tsk, Emt), Rlk (Txk), and similar
proteins. They are cytoplasmic (or nonreceptor) tyr
kinases containing Src homology protein interaction
domains (SH3, SH2) N-terminal to the catalytic tyr
kinase domain. Most Tec subfamily members (except Rlk)
also contain an N-terminal pleckstrin homology (PH)
domain, which binds the products of PI3K and allows
membrane recruitment and activation. In addition, some
members contain the Tec homology (TH) domain, which
contains proline-rich and zinc-binding regions. Tec
kinases are expressed mainly by haematopoietic cells,
although Tec and Bmx are also found in endothelial
cells. B-cells express Btk and Tec, while T-cells
express Itk, Txk, and Tec. Collectively, Tec kinases are
expressed in a variety of myeloid cells such as mast
cells, platelets, macrophages, and dendritic cells. Each
Tec kinase shows a distinct cell-type pattern of
expression. The function of Tec kinases in lymphoid
cells have been studied extensively. They play important
roles in the development, differentiation, maturation,
regulation, survival, and function of B-cells and
T-cells. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 37.3 bits (87), Expect = 4e-04
Identities = 16/40 (40%), Positives = 23/40 (57%), Gaps = 2/40 (5%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGK 236
I VA +DF P E LPL++G + +VL E WW+ +
Sbjct: 1 IVVALYDFQPIEPGDLPLEKGEEYVVLDDSNEH--WWRAR 38
>gnl|CDD|212942 cd12009, SH3_Blk, Src homology 3 domain of Blk Protein Tyrosine
Kinase. Blk is a member of the Src subfamily of
proteins, which are cytoplasmic (or non-receptor) PTKs.
It is expressed specifically in B-cells and is involved
in pre-BCR (B-cell receptor) signaling. Src kinases
contain an N-terminal SH4 domain with a myristoylation
site, followed by SH3 and SH2 domains, a tyr kinase
domain, and a regulatory C-terminal region containing a
conserved tyr. They are activated by autophosphorylation
at the tyr kinase domain, but are negatively regulated
by phosphorylation at the C-terminal tyr by Csk
(C-terminal Src Kinase). The SH3 domain of Src kinases
contributes to substrate recruitment by binding adaptor
proteins/substrates, and regulation of kinase activity
through an intramolecular interaction. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 54
Score = 35.9 bits (83), Expect = 0.001
Identities = 15/38 (39%), Positives = 23/38 (60%), Gaps = 3/38 (7%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGK 236
+A++DF P+ L LK+G ++ VL +GE WW K
Sbjct: 3 IAQYDFVPSNERDLQLKKGEKLQVLKSDGE---WWLAK 37
>gnl|CDD|212792 cd11858, SH3_Myosin-I_fungi, Src homology 3 domain of Type I fungal
Myosins. Type I myosins (myosin-I) are actin-dependent
motors in endocytic actin structures and actin patches.
They play roles in membrane traffic in endocytic and
secretory pathways, cell motility, and mechanosensing.
Saccharomyces cerevisiae has two myosins-I, Myo3 and
Myo5, which are involved in endocytosis and the
polarization of the actin cytoskeleton. Myosin-I
contains an N-terminal actin-activated ATPase, a
phospholipid-binding TH1 (tail homology 1) domain, and a
C-terminal extension which includes an F-actin-binding
TH2 domain, an SH3 domain, and an acidic peptide that
participates in activating the Arp2/3complex. The SH3
domain of myosin-I is required for myosin-I-induced
actin polymerization. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 35.8 bits (83), Expect = 0.001
Identities = 15/37 (40%), Positives = 21/37 (56%), Gaps = 2/37 (5%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGK 236
A +DF + AN+L LK+ V ++ KE GWW K
Sbjct: 4 ALYDFAGSVANELSLKKDDIVYIVQKEDN--GWWLAK 38
>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 = 37.0 bits (86), Expect = 0.001
Identities = 20/65 (30%), Positives = 35/65 (53%), Gaps = 7/65 (10%)
Query: 89 LWFVGEMGREKATSLLEREA--DGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYE 146
WF G + R++A L+ ++ DG +L+R + N + LSLK +K+KH ++
Sbjct: 6 PWFHGGISRDEAARLIRQQGLVDGVFLVR-----ESQSNPGAFVLSLKHGQKIKHYQIIP 60
Query: 147 KEMDG 151
E +G
Sbjct: 61 IEDEG 65
>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 = 37.1 bits (86), Expect = 0.002
Identities = 22/74 (29%), Positives = 37/74 (50%), Gaps = 10/74 (13%)
Query: 90 WFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKEM 149
W+ G M R++A LL+ + G +L+R T P + Y LS+ + +V H +
Sbjct: 9 WYFGPMSRQEAQELLQGQRHGVFLVR---DSSTIPGD--YVLSVSENSRVSHYII----- 58
Query: 150 DGVPQYFLSQSRYF 163
+ + Q +QSRY
Sbjct: 59 NSLGQPAPNQSRYR 72
>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 = 37.2 bits (86), Expect = 0.002
Identities = 23/90 (25%), Positives = 45/90 (50%), Gaps = 8/90 (8%)
Query: 90 WFVGEMGREKATSLLEREA--DGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEK 147
WF ++ R++A L+ ++ DG +L+R + N + LS+ +K+KH ++
Sbjct: 7 WFHHKISRDEAQRLIIQQGLVDGVFLVR-----DSQSNPRTFVLSMSHGQKIKHFQIIPV 61
Query: 148 EMDGVPQYFLSQSRY-FRSIVELICCYERN 176
E DG + L F +++L+ Y+ N
Sbjct: 62 EDDGELFHTLDDGHTRFTDLIQLVEFYQLN 91
>gnl|CDD|212838 cd11905, SH3_Tec, Src Homology 3 domain of Tec (Tyrosine kinase
expressed in hepatocellular carcinoma). Tec is a
cytoplasmic (or nonreceptor) tyr kinase containing Src
homology protein interaction domains (SH3, SH2)
N-terminal to the catalytic tyr kinase domain. It also
contains an N-terminal pleckstrin homology (PH) domain,
which binds the products of PI3K and allows membrane
recruitment and activation, and the Tec homology (TH)
domain, which contains proline-rich and zinc-binding
regions. It is more widely-expressed than other Tec
subfamily kinases. Tec is found in endothelial cells,
both B- and T-cells, and a variety of myeloid cells
including mast cells, erythroid cells, platelets,
macrophages and neutrophils. Tec is a key component of
T-cell receptor (TCR) signaling, and is important in
TCR-stimulated proliferation, IL-2 production and
phospholipase C-gamma1 activation. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 35.2 bits (81), Expect = 0.002
Identities = 16/40 (40%), Positives = 23/40 (57%), Gaps = 2/40 (5%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGK 236
I VA +DF PTE + L L+ G + ++L K WWK +
Sbjct: 2 IVVAMYDFQPTEPHDLRLETGEEYVILEK--NDVHWWKAR 39
>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 = 35.9 bits (83), Expect = 0.002
Identities = 21/63 (33%), Positives = 31/63 (49%), Gaps = 6/63 (9%)
Query: 83 ENLSEYLWFVGEMGREKA-TSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKH 141
E L W+ G + R A LL DG+YLLR +G +++LS++ + VKH
Sbjct: 1 ELLQSLGWYHGNLTRHAAEALLLSNGVDGSYLLRNSNEGT-----GLFSLSVRAKDSVKH 55
Query: 142 MKV 144
V
Sbjct: 56 FHV 58
>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 = 35.1 bits (81), Expect = 0.003
Identities = 20/53 (37%), Positives = 30/53 (56%), Gaps = 5/53 (9%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYFFQLYWGNF 252
A +D+ E+++L K G + L +E EQ GW KG++D RV LY N+
Sbjct: 4 ALYDYEGQESDELSFKAGDILTKLEEEDEQ-GWCKGRLDGRVG----LYPANY 51
>gnl|CDD|212919 cd11986, SH3_Stac3_1, First C-terminal Src homology 3 domain of SH3
and cysteine-rich domain-containing protein 3 (Stac3).
Stac proteins are putative adaptor proteins that contain
a cysteine-rich C1 domain and one or two SH3 domains at
the C-terminus. There are three mammalian members
(Stac1, Stac2, and Stac3) of this family. Stac1 and
Stac3 contain two SH3 domains while Stac2 contains a
single SH3 domain at the C-terminus. Stac1 and Stac2
have been found to be expressed differently in mature
dorsal root ganglia (DRG) neurons. Stac1 is mainly
expressed in peptidergic neurons while Stac2 is found in
a subset of nonpeptidergic and all trkB+ neurons. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 34.9 bits (80), Expect = 0.003
Identities = 16/46 (34%), Positives = 24/46 (52%), Gaps = 2/46 (4%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
VA + F E + L G ++ V+ E+ WW+GKI E+ YF
Sbjct: 3 VALYRFKALEKDDLDFHPGERITVIDDSNEE--WWRGKIGEKTGYF 46
>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 = 34.8 bits (80), Expect = 0.004
Identities = 17/51 (33%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYFFQLY 248
AVA + F TE+++LP ++G + +L+ E +Q W+K ++ R Y + Y
Sbjct: 2 AVALYSFQATESDELPFQKGDILKILNMEDDQ-NWYKAELQGREGYIPKNY 51
>gnl|CDD|212799 cd11865, SH3_Nbp2-like, Src Homology 3 domain of Saccharomyces
cerevisiae Nap1-binding protein 2 and similar fungal
proteins. This subfamily includes Saccharomyces
cerevisiae Nbp2 (Nucleosome assembly protein 1
(Nap1)-binding protein 2), Schizosaccharomyces pombe
Skb5, and similar proteins. Nbp2 interacts with Nap1,
which is essential for maintaining proper nucleosome
structures in transcription and replication. It is also
the binding partner of the yeast type II protein
phosphatase Ptc1p and serves as a scaffolding protein
that brings seven kinases in close contact to Ptc1p.
Nbp2 plays a role many cell processes including
organelle inheritance, mating hormone response, cell
wall stress, mitotic cell growth at elevated
temperatures, and high osmolarity. Skb5 interacts with
the p21-activated kinase (PAK) homolog Shk1, which is
critical for fission yeast cell viability. Skb5
activates Shk1 and plays a role in regulating cell
morphology and growth under hypertonic conditions. Nbp2
and Skb5 contain an SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 34.4 bits (79), Expect = 0.004
Identities = 14/35 (40%), Positives = 20/35 (57%), Gaps = 2/35 (5%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGW 232
AVA +DF P N+L +G + +L K G+ GW
Sbjct: 2 AVALYDFEPEHDNELGFAEGQILFILYKHGQ--GW 34
>gnl|CDD|212985 cd12052, SH3_CIN85_1, First Src Homology 3 domain (SH3A) of
Cbl-interacting protein of 85 kDa. CIN85, also called
SH3 domain-containing kinase-binding protein 1 (SH3KBP1)
or CD2-binding protein 3 (CD2BP3) or Ruk, is an adaptor
protein that is involved in the downregulation of
receptor tyrosine kinases by facilitating endocytosis
through interaction with endophilin-associated ubiquitin
ligase Cbl proteins. It is also important in many other
cellular processes including vesicle-mediated transport,
cytoskeletal remodelling, apoptosis, cell adhesion and
migration, and viral infection, among others. CIN85
exists as multiple variants from alternative splicing;
the main variant contains three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CIN85 to bind
various protein partners and assemble complexes that
have been implicated in many different functions. This
alignment model represents the first SH3 domain (SH3A)
of CIN85; SH3A binds to internal proline-rich motifs
within the proline-rich region. This intramolecular
interaction serves as a regulatory mechanism to keep
CIN85 in a closed conformation, preventing the
recruitment of other proteins. SH3A has also been shown
to bind ubiquitin and to an atypical PXXXPR motif at the
C-terminus of Cbl and the cytoplasmic end of the cell
adhesion protein CD2. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 34.1 bits (78), Expect = 0.005
Identities = 14/47 (29%), Positives = 24/47 (51%), Gaps = 2/47 (4%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
A+ EFD+ ++L + G + + K+ GWW+G+I R F
Sbjct: 2 AIVEFDYKAQHEDELTITVGDIITKIKKD--DGGWWEGEIKGRRGLF 46
>gnl|CDD|212989 cd12056, SH3_CD2AP_3, Third Src Homology 3 domain (SH3C) of
CD2-associated protein. CD2AP, also called CMS (Cas
ligand with Multiple SH3 domains) or METS1
(Mesenchyme-to-Epithelium Transition protein with SH3
domains), is a cytosolic adaptor protein that plays a
role in regulating the cytoskeleton. It is critical in
cell-to-cell union necessary for kidney function. It
also stabilizes the contact between a T cell and
antigen-presenting cells. It is primarily expressed in
podocytes at the cytoplasmic face of the slit diaphragm
and serves as a linker anchoring podocin and nephrin to
the actin cytoskeleton. CD2AP contains three SH3
domains, a proline-rich region, and a C-terminal
coiled-coil domain. All of these domains enable CD2AP to
bind various protein partners and assemble complexes
that have been implicated in many different functions.
This alignment model represents the third SH3 domain
(SH3C) of CD2AP. SH3C has been shown to bind ubiquitin.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 34.4 bits (79), Expect = 0.005
Identities = 14/45 (31%), Positives = 28/45 (62%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
A F + T ++L K+G ++++SK+ + GWWKG+++ + F
Sbjct: 6 ALFHYEGTNEDELDFKEGEIILIISKDTGEPGWWKGELNGKEGVF 50
>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 = 35.4 bits (82), Expect = 0.005
Identities = 31/96 (32%), Positives = 48/96 (50%), Gaps = 12/96 (12%)
Query: 83 ENLSEYLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHM 142
E L W+ G+M R A SLL+ DG +L+R + T P + Y L+ + + KH+
Sbjct: 2 EQLRGEPWYHGKMSRRDAESLLQT--DGDFLVR---ESTTTPGQ--YVLTGMQNGQPKHL 54
Query: 143 KVYEKEMDGVPQYFLSQSRYFRSIVELICCYERNSL 178
+ + E GV + ++ R F SI LI + N L
Sbjct: 55 LLVDPE--GVVR---TKDRVFESISHLINYHVTNGL 85
>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 = 33.9 bits (78), Expect = 0.005
Identities = 15/46 (32%), Positives = 26/46 (56%), Gaps = 1/46 (2%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSY 243
AVA+ DF T ++L K+G + VL+ E + W+K ++D +
Sbjct: 2 AVAKHDFKATAEDELSFKKGSILKVLNME-DDPNWYKAELDGKEGL 46
>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 = 33.9 bits (78), Expect = 0.006
Identities = 13/40 (32%), Positives = 25/40 (62%)
Query: 202 FDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERV 241
+D E ++L K+G + ++SKE + GWW G+++ +V
Sbjct: 6 WDCSGNEPDELSFKRGDLIYIISKEYDSFGWWVGELNGKV 45
>gnl|CDD|212806 cd11873, SH3_CD2AP-like_1, First Src Homology 3 domain (SH3A) of
CD2-associated protein and similar proteins. This
subfamily is composed of the first SH3 domain (SH3A) of
CD2AP, CIN85 (Cbl-interacting protein of 85 kDa), and
similar domains. CD2AP and CIN85 are adaptor proteins
that bind to protein partners and assemble complexes
that have been implicated in T cell activation, kidney
function, and apoptosis of neuronal cells. They also
associate with endocytic proteins, actin cytoskeleton
components, and other adaptor proteins involved in
receptor tyrosine kinase (RTK) signaling. CD2AP and the
main isoform of CIN85 contain three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CD2AP and CIN85 to
bind various protein partners and assemble complexes
that have been implicated in many different functions.
SH3A of both proteins bind to an atypical PXXXPR motif
at the C-terminus of Cbl and the cytoplasmic domain of
the cell adhesion protein CD2. CIN85 SH3A binds to
internal proline-rich motifs within the proline-rich
region; this intramolecular interaction serves as a
regulatory mechanism to keep CIN85 in a closed
conformation, preventing the recruitment of other
proteins. CIN85 SH3A has also been shown to bind
ubiquitin. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 34.2 bits (79), Expect = 0.006
Identities = 15/47 (31%), Positives = 25/47 (53%), Gaps = 2/47 (4%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
+ EFD+ E ++L LK G + + K E GWW+G ++ + F
Sbjct: 2 VIVEFDYDAEEPDELTLKVGDIITNVKKMEE--GWWEGTLNGKRGMF 46
>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 = 35.0 bits (80), Expect = 0.006
Identities = 26/91 (28%), Positives = 45/91 (49%), Gaps = 9/91 (9%)
Query: 89 LWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKE 148
+W+ G + R A +LL + +YL+R + ++ ++LSLK+ + HMK+ +
Sbjct: 2 VWYHGAISRTDAENLLRLCKEASYLVR-----NSETSKNDFSLSLKSSQGFMHMKLSRTK 56
Query: 149 MDGVPQYFLSQ-SRYFRSIVELICCYERNSL 178
+Y L Q S F S+ E+I Y L
Sbjct: 57 EH---KYVLGQNSPPFSSVPEIIHHYASRKL 84
>gnl|CDD|198276 cd10413, SH2_Grb7, Src homology 2 (SH2) domain found in the growth
factor receptor bound, subclass 7 (Grb7) proteins. The
Grb family binds to the epidermal growth factor receptor
(EGFR, erbB1) via their SH2 domains. Grb7 is part of the
Grb7 family of proteins which also includes Grb10, and
Grb14. They are composed of an N-terminal Proline-rich
domain, a Ras Associating-like (RA) domain, a Pleckstrin
Homology (PH) domain, a phosphotyrosine interaction
region (PIR, BPS) and a C-terminal SH2 domain. The SH2
domains of Grb7, Grb10 and Grb14 preferentially bind to
a different RTK. Grb7 binds strongly to the erbB2
receptor, unlike Grb10 and Grb14 which bind weakly to
it. Grb7 family proteins are phosphorylated on
serine/threonine as well as tyrosine residues. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 108
Score = 35.3 bits (81), Expect = 0.006
Identities = 24/86 (27%), Positives = 44/86 (51%), Gaps = 10/86 (11%)
Query: 89 LWFVGEMGREKATSLLEREA--DGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYE 146
WF G + RE++ L+ ++ DG +L+R + P + LSL +KVKH +
Sbjct: 6 PWFHGRISREESQRLIGQQGLVDGVFLVRESQRNPQG-----FVLSLCHLQKVKHYLILP 60
Query: 147 KEMDGVPQYFLS--QSRYFRSIVELI 170
E +G + + Q+R F +++L+
Sbjct: 61 SEEEGRLYFSMDDGQTR-FTDLLQLV 85
>gnl|CDD|212925 cd11992, SH3_Intersectin2_3, Third Src homology 3 domain (or SH3C)
of Intersectin-2. Intersectin-2 (ITSN2) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN2 also functions as a specific GEF for Cdc42
activation in epithelial morphogenesis, and is required
in mitotic spindle orientation. It exists in
alternatively spliced short and long isoforms. The short
isoform contains two Eps15 homology domains (EH1 and
EH2), a coiled-coil region and five SH3 domains
(SH3A-E), while the long isoform, in addition, contains
RhoGEF (also called Dbl-homologous or DH), Pleckstrin
homology (PH) and C2 domains. The third SH3 domain
(SH3C) of ITSN2 has been shown to bind the K15 protein
of Kaposi's sarcoma-associated herpesvirus. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 33.8 bits (77), Expect = 0.007
Identities = 14/46 (30%), Positives = 25/46 (54%), Gaps = 3/46 (6%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
+A + + +E L +G +++V K+GE WW G I++R F
Sbjct: 3 IALYPYSSSEPGDLTFNEGEEILVTQKDGE---WWTGSIEDRTGIF 45
>gnl|CDD|212834 cd11901, SH3_Nck1_2, Second Src Homology 3 domain of Nck1 adaptor
protein. Nck1 (also called Nckalpha) plays a crucial
role in connecting signaling pathways of tyrosine kinase
receptors and important effectors in actin dynamics and
cytoskeletal remodeling. It binds and activates RasGAP,
resulting in the downregulation of Ras. It is also
involved in the signaling of endothilin-mediated
inhibition of cell migration. Nck adaptor proteins
regulate actin cytoskeleton dynamics by linking
proline-rich effector molecules to protein tyrosine
kinases and phosphorylated signaling intermediates. They
contain three SH3 domains and a C-terminal SH2 domain.
They function downstream of the PDGFbeta receptor and
are involved in Rho GTPase signaling and actin dynamics.
Vertebrates contain two Nck adaptor proteins: Nck1 (also
called Nckalpha) and Nck2, which show partly overlapping
functions but also bind distinct targets. The second SH3
domain of Nck appears to prefer ligands containing the
APxxPxR motif. SH3 domains are protein interaction
domains that usually bind to proline-rich ligands with
moderate affinity and selectivity, preferentially a PxxP
motif. They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 33.9 bits (77), Expect = 0.007
Identities = 15/47 (31%), Positives = 28/47 (59%), Gaps = 2/47 (4%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
A +F++ ++L L +G +VIV+ K + GWW+G + +V +F
Sbjct: 4 AYVKFNYTAEREDELSLVKGTKVIVMEKCSD--GWWRGSYNGQVGWF 48
>gnl|CDD|212991 cd12058, SH3_MLK4, Src Homology 3 domain of Mixed Lineage Kinase 4.
MLK4 is a Serine/Threonine Kinase (STK), catalyzing the
transfer of the gamma-phosphoryl group from ATP to S/T
residues on protein substrates. MLKs act as
mitogen-activated protein kinase kinase kinases (MAP3Ks,
MKKKs, MAPKKKs), which phosphorylate and activate MAPK
kinases (MAPKKs or MKKs or MAP2Ks), which in turn
phosphorylate and activate MAPKs during signaling
cascades that are important in mediating cellular
responses to extracellular signals. MLKs play roles in
immunity and inflammation, as well as in cell death,
proliferation, and cell cycle regulation. The specific
function of MLK4 is yet to be determined. Mutations in
the kinase domain of MLK4 have been detected in
colorectal cancers. MLK4 contains an SH3 domain, a
catalytic kinase domain, a leucine zipper, a
proline-rich region, and a CRIB domain that mediates
binding to GTP-bound Cdc42 and Rac. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 33.8 bits (77), Expect = 0.007
Identities = 17/48 (35%), Positives = 27/48 (56%), Gaps = 3/48 (6%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGE---QKGWWKGKIDERVSYF 244
A +D+ + ++L L++G V VLS++ GWW GKI R+ F
Sbjct: 4 ALYDYEASGEDELSLRRGDVVEVLSQDAAVSGDDGWWAGKIRHRLGIF 51
>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 = 34.9 bits (80), Expect = 0.007
Identities = 19/57 (33%), Positives = 29/57 (50%), Gaps = 10/57 (17%)
Query: 90 WFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETI--YALSLKTDEKVKHMKV 144
WF G + RE+A +LL +G++L+R+ +E I Y LS + KH V
Sbjct: 9 WFHGIISREEAEALLMNATEGSFLVRV--------SEKIWGYTLSYRLQSGFKHFLV 57
>gnl|CDD|212885 cd11952, SH3_iASPP, Src Homology 3 (SH3) domain of Inhibitor of
ASPP protein (iASPP). iASPP, also called
RelA-associated inhibitor (RAI), is an oncoprotein that
inhibits the apoptotic transactivation potential of p53.
It is upregulated in human breast cancers expressing
wild-type p53, in acute leukemias regardless of the p53
mutation status, as well as in ovarian cancer where it
is associated with poor patient outcome and
chemoresistance. iASPP is also a binding partner and
negative regulator of p65RelA, which promotes cell
proliferation and inhibits apoptosis; p65RelA has the
opposite effect on cell growth compared to the p53
family. It contains a proline-rich region, four ankyrin
(ANK) repeats, and an SH3 domain at its C-terminal half.
The SH3 domain and the ANK repeats of iASPP contribute
to the p53 binding site; they bind to the DNA binding
domain of p53. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 33.7 bits (77), Expect = 0.008
Identities = 17/51 (33%), Positives = 26/51 (50%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYFFQLYWG 250
A +D+ ++L K+G V VL K+GE WW + R Y + Y+G
Sbjct: 5 ALWDYSAEFPDELSFKEGDMVTVLRKDGEGTDWWWASLCGREGYVPRNYFG 55
>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 = 34.7 bits (79), Expect = 0.009
Identities = 29/91 (31%), Positives = 46/91 (50%), Gaps = 10/91 (10%)
Query: 89 LWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKE 148
+W+ G + R A +LL + +YL+R Q H Y+LSLK+++ HMK+ + +
Sbjct: 2 IWYHGAISRGDAENLLRLCKECSYLVR-NSQTSKHD----YSLSLKSNQGFMHMKLAKTK 56
Query: 149 MDGVPQYFLSQ-SRYFRSIVELICCYERNSL 178
+Y L Q S F S+ E+I Y L
Sbjct: 57 ----EKYVLGQNSPPFDSVPEVIHYYTTRKL 83
>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 = 34.5 bits (79), Expect = 0.010
Identities = 26/90 (28%), Positives = 45/90 (50%), Gaps = 9/90 (10%)
Query: 90 WFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKEM 149
W+ G + R +A S L+ + +YL+R G + Y+++LKT + H+ V + +
Sbjct: 3 WYHGSISRAEAESRLQPCKEASYLVRNSESGNSK-----YSIALKTSQGCVHIIVAQTKD 57
Query: 150 DGVPQYFLSQ-SRYFRSIVELICCYERNSL 178
+ Y L+Q S F SI E++ Y L
Sbjct: 58 NK---YTLNQTSAVFDSIPEVVHYYSNEKL 84
>gnl|CDD|212807 cd11874, SH3_CD2AP-like_2, Second Src Homology 3 domain (SH3B) of
CD2-associated protein and similar proteins. This
subfamily is composed of the second SH3 domain (SH3B) of
CD2AP, CIN85 (Cbl-interacting protein of 85 kDa), and
similar domains. CD2AP and CIN85 are adaptor proteins
that bind to protein partners and assemble complexes
that have been implicated in T cell activation, kidney
function, and apoptosis of neuronal cells. They also
associate with endocytic proteins, actin cytoskeleton
components, and other adaptor proteins involved in
receptor tyrosine kinase (RTK) signaling. CD2AP and the
main isoform of CIN85 contain three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CD2AP and CIN85 to
bind various protein partners and assemble complexes
that have been implicated in many different functions.
SH3B of both proteins have been shown to bind to Cbl. In
the case of CD2AP, its SH3B binds to Cbl at a site
distinct from the c-Cbl/SH3A binding site. The CIN85
SH3B also binds ubiquitin. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 33.1 bits (76), Expect = 0.011
Identities = 16/45 (35%), Positives = 25/45 (55%), Gaps = 2/45 (4%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
F + P ++L LK G + VL + E GWW+GK++ +V F
Sbjct: 4 VLFSYTPQNEDELELKVGDTIEVLGEVEE--GWWEGKLNGKVGVF 46
>gnl|CDD|212902 cd11969, SH3_PLCgamma2, Src homology 3 domain of Phospholipase C
(PLC) gamma 2. PLCgamma2 is primarily expressed in
haematopoietic cells, specifically in B cells. It is
activated by tyrosine phosphorylation by B cell receptor
(BCR) kinases and is recruited to the plasma membrane
where its substrate is located. It is required in
pre-BCR signaling and in the maturation of B cells. PLCs
catalyze the hydrolysis of phosphatidylinositol
(4,5)-bisphosphate [PtdIns(4,5)P2] to produce
Ins(1,4,5)P3 and diacylglycerol (DAG). Ins(1,4,5)P3
initiates the calcium signaling cascade while DAG
functions as an activator of PKC. PLCgamma contains a
Pleckstrin homology (PH) domain followed by an
elongation factor (EF) domain, two catalytic regions of
PLC domains that flank two tandem SH2 domains, followed
by a SH3 domain and C2 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 33.3 bits (76), Expect = 0.012
Identities = 14/46 (30%), Positives = 25/46 (54%), Gaps = 2/46 (4%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYFF 245
A +D+ +++L +G + +SKE GWWKG +V ++F
Sbjct: 4 ALYDYRAKRSDELSFCKGALIHNVSKETG--GWWKGDYGGKVQHYF 47
>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 = 34.2 bits (78), Expect = 0.013
Identities = 20/61 (32%), Positives = 30/61 (49%), Gaps = 2/61 (3%)
Query: 84 NLSEYLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMK 143
LS+Y WF G + R KA L+ ++ L + Q T P E Y L+ K KH++
Sbjct: 4 ELSDYPWFHGTLSRVKAAQLVLAGGPRSHGLFVIRQSETRPGE--YVLTFNFQGKAKHLR 61
Query: 144 V 144
+
Sbjct: 62 L 62
>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 = 33.9 bits (77), Expect = 0.015
Identities = 28/90 (31%), Positives = 42/90 (46%), Gaps = 9/90 (10%)
Query: 90 WFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKEM 149
WF G + R A +LL +G+YL+R+ T P + LSL++ + H+K
Sbjct: 3 WFHGPLSRADAENLLSLCKEGSYLVRL---SETRPQDCS--LSLRSSQGFLHLKFARTRE 57
Query: 150 DGVPQYFLSQ-SRYFRSIVELICCYERNSL 178
+ Q L Q S F S+ EL+ Y L
Sbjct: 58 N---QVVLGQHSGPFPSVPELVLHYSSRPL 84
>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 = 34.2 bits (78), Expect = 0.016
Identities = 25/95 (26%), Positives = 48/95 (50%), Gaps = 15/95 (15%)
Query: 90 WFVGEMGREKATSLLEREAD--GTYLLRIRPQGPTHPNETIYALSLKT-DE----KVKHM 142
W+ G+MGR+ A LL + G +L+R + + Y+LS++ DE VKH
Sbjct: 5 WYFGKMGRKDAERLLLNPGNQRGIFLVR-----ESETTKGAYSLSIRDWDEVRGDNVKHY 59
Query: 143 KVYEKEMDGVPQYFLSQSRYFRSIVELICCYERNS 177
K+ + + G Y+++ F ++ +L+ Y ++
Sbjct: 60 KIRKLDNGG---YYITTRAQFDTLQKLVKHYTEHA 91
>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 = 32.7 bits (75), Expect = 0.018
Identities = 14/37 (37%), Positives = 19/37 (51%), Gaps = 2/37 (5%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGK 236
A FDF + LP K+G + V+ K EQ WW +
Sbjct: 5 ALFDFPGNDDEDLPFKKGEILTVIRKPEEQ--WWNAR 39
>gnl|CDD|212835 cd11902, SH3_Nck2_2, Second Src Homology 3 domain of Nck2 adaptor
protein. Nck2 (also called Nckbeta or Growth factor
receptor-bound protein 4, Grb4) plays a crucial role in
connecting signaling pathways of tyrosine kinase
receptors and important effectors in actin dynamics and
cytoskeletal remodeling. It binds neuronal signaling
proteins such as ephrinB and Disabled-1 (Dab-1)
exclusively. Nck adaptor proteins regulate actin
cytoskeleton dynamics by linking proline-rich effector
molecules to protein tyrosine kinases and phosphorylated
signaling intermediates. They contain three SH3 domains
and a C-terminal SH2 domain. They function downstream of
the PDGFbeta receptor and are involved in Rho GTPase
signaling and actin dynamics. Vertebrates contain two
Nck adaptor proteins: Nck1 (also called Nckalpha) and
Nck2, which show partly overlapping functions but also
bind distinct targets. The second SH3 domain of Nck
appears to prefer ligands containing the APxxPxR motif.
SH3 domains are protein interaction domains that usually
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially a PxxP motif. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 32.7 bits (74), Expect = 0.019
Identities = 14/49 (28%), Positives = 27/49 (55%), Gaps = 2/49 (4%)
Query: 196 IIAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
I A +F + ++L L +G +V V+ K + GWW+G + ++ +F
Sbjct: 1 IPAFVKFAYVAEREDELSLVKGSRVTVMEKCSD--GWWRGSYNGQIGWF 47
>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 = 32.4 bits (74), Expect = 0.020
Identities = 13/37 (35%), Positives = 19/37 (51%), Gaps = 2/37 (5%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWW 233
VA DF T+ +QL + G +++VL K WW
Sbjct: 1 EYVAIADFVATDDSQLSFESGDKLLVLRKPSVD--WW 35
>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 = 33.7 bits (77), Expect = 0.021
Identities = 22/91 (24%), Positives = 44/91 (48%), Gaps = 15/91 (16%)
Query: 90 WFVGEMGREKATSLLEREAD--GTYLLRIRPQGPTHPNETIYALSLK-----TDEKVKHM 142
W+ G++GR+ A L + G +L+R + + Y+LS++ + VKH
Sbjct: 5 WYFGKIGRKDAERQLLSPGNPRGAFLIR-----ESETTKGAYSLSIRDWDQNRGDHVKHY 59
Query: 143 KVYEKEMDGVPQYFLSQSRYFRSIVELICCY 173
K+ + + G Y+++ F ++ EL+ Y
Sbjct: 60 KIRKLDTGG---YYITTRAQFDTVQELVQHY 87
>gnl|CDD|198210 cd10347, SH2_Nterm_shark_like, N-terminal Src homology 2 (SH2)
domain found in SH2 domains, ANK, and kinase domain
(shark) proteins. These non-receptor protein-tyrosine
kinases contain two SH2 domains, five ankyrin (ANK)-like
repeats, and a potential tyrosine phosphorylation site
in the carboxyl-terminal tail which resembles the
phosphorylation site in members of the src family. Like,
mammalian non-receptor protein-tyrosine kinases, ZAP-70
and syk proteins, they do not have SH3 domains. However,
the presence of ANK makes these unique among
protein-tyrosine kinases. Both tyrosine kinases and ANK
repeats have been shown to transduce developmental
signals, and SH2 domains are known to participate
intimately in tyrosine kinase signaling. These tyrosine
kinases are believed to be involved in epithelial cell
polarity. The members of this family include the shark
(SH2 domains, ANK, and kinase domain) gene in Drosophila
and yellow fever mosquitos, as well as the hydra protein
HTK16. Drosophila Shark is proposed to transduce
intracellularly the Crumbs, a protein necessary for
proper organization of ectodermal epithelia,
intercellular signal. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 81
Score = 33.1 bits (76), Expect = 0.021
Identities = 20/58 (34%), Positives = 32/58 (55%), Gaps = 7/58 (12%)
Query: 89 LWFVGEMGREKATSLLEREA--DGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKV 144
W+ G++ RE A +LL RE DG +L+R + + P + Y LSL +V H ++
Sbjct: 2 RWYHGKISREVAEALLLREGGRDGLFLVR---ESTSAPGD--YVLSLLAQGEVLHYQI 54
>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 = 32.4 bits (74), Expect = 0.021
Identities = 10/43 (23%), Positives = 23/43 (53%), Gaps = 2/43 (4%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDER 240
A A+FD+ +L K+G + + + + WW+G+++ +
Sbjct: 2 ATAQFDYTGRSERELSFKKGDSLTLYRQVSDD--WWRGQLNGQ 42
>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 = 32.3 bits (74), Expect = 0.021
Identities = 11/46 (23%), Positives = 23/46 (50%), Gaps = 2/46 (4%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
A + + ++L L+ G + V K+ + GWW G+++ + F
Sbjct: 3 KALYSYTANREDELSLQPGDIIEVHEKQDD--GWWLGELNGKKGIF 46
>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 = 33.5 bits (77), Expect = 0.022
Identities = 25/99 (25%), Positives = 43/99 (43%), Gaps = 18/99 (18%)
Query: 90 WFVGEMGREKATSLL-EREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKE 148
WF + +A +LL R DG++L R P+ N + LS++ ++V H+K+
Sbjct: 2 WFHPVISGIEAENLLKTRGVDGSFLAR-----PSKSNPGDFTLSVRRGDEVTHIKIQNTG 56
Query: 149 MDGVPQYFLSQSRYFRSIVELICCY--------ERNSLI 179
Y L F ++ EL+ Y E+N +
Sbjct: 57 DY----YDLYGGEKFATLSELVQYYMEQHGQLREKNGDV 91
>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 = 32.3 bits (74), Expect = 0.026
Identities = 11/38 (28%), Positives = 19/38 (50%), Gaps = 2/38 (5%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKG 235
A A +D+ E N++ +G + + + E GWW G
Sbjct: 2 AKALYDYQAAEDNEISFVEGDIITQIEQIDE--GWWLG 37
>gnl|CDD|198206 cd10343, SH2_SHIP, Src homology 2 (SH2) domain found in
SH2-containing inositol-5'-phosphatase (SHIP) and
SLAM-associated protein (SAP). The SH2-containing
inositol-5'-phosphatase, SHIP (also called
SHIP1/SHIP1a), is a hematopoietic-restricted
phosphatidylinositide phosphatase that translocates to
the plasma membrane after extracellular stimulation and
hydrolyzes the phosphatidylinositol-3-kinase
(PI3K)-generated second messenger PI-3,4,5-P3 (PIP3) to
PI-3,4-P2. As a result, SHIP dampens down PIP3 mediated
signaling and represses the proliferation,
differentiation, survival, activation, and migration of
hematopoietic cells. PIP3 recruits lipid-binding
pleckstrin homology(PH) domain-containing proteins to
the inner wall of the plasma membrane and activates
them. PH domain-containing downstream effectors include
the survival/proliferation enhancing serine/threonine
kinase, Akt (protein kinase B), the tyrosine kinase,
Btk, the regulator of protein translation, S6K, and the
Rac and cdc42 guanine nucleotide exchange factor, Vav.
SHIP is believed to act as a tumor suppressor during
leukemogenesis and lymphomagenesis, and may play a role
in activating the immune system to combat cancer. SHIP
contains an N-terminal SH2 domain, a centrally located
phosphatase domain that specifically hydrolyzes the
5'-phosphate from PIP3, PI-4,5-P2 and inositol-1,3,4,5-
tetrakisphosphate (IP4), a C2 domain, that is an
allosteric activating site when bound by SHIP's
enzymatic product, PI-3,4-P2; 2 NPXY motifs that bind
proteins with a phosphotyrosine binding (Shc, Dok 1, Dok
2) or an SH2 (p85a, SHIP2) domain; and a proline-rich
domain consisting of four PxxP motifs that bind a subset
of SH3-containing proteins including Grb2, Src, Lyn,
Hck, Abl, PLCg1, and PIAS1. The SH2 domain of SHIP binds
to the tyrosine phosphorylated forms of Shc, SHP-2,
Doks, Gabs, CD150, platelet-endothelial cell adhesion
molecule, Cas, c-Cbl, immunoreceptor tyrosine-based
inhibitory motifs (ITIMs), and immunoreceptor
tyrosine-based activation motifs (ITAMs). The X-linked
lymphoproliferative syndrome (XLP) gene encodes SAP
(also called SH2D1A/DSHP) a protein that consists of a 5
residue N-terminus, a single SH2 domain, and a short 25
residue C-terminal tail. XLP is characterized by an
extreme sensitivity to Epstein-Barr virus. Both T and
natural killer (NK) cell dysfunctions have been seen in
XLP patients. SAP binds the cytoplasmic tail of
Signaling lymphocytic activation molecule (SLAM), 2B4,
Ly-9, and CD84. SAP is believed to function as a
signaling inhibitor, by blocking or regulating binding
of other signaling proteins. SAP and the SAP-like
protein EAT-2 recognize the sequence motif TIpYXX(V/I),
which is found in the cytoplasmic domains of a
restricted number of T, B, and NK cell surface receptors
and are proposed to be natural inhibitors or regulators
of the physiological role of a small family of receptors
on the surface of these cells. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 33.6 bits (77), Expect = 0.026
Identities = 31/116 (26%), Positives = 49/116 (42%), Gaps = 29/116 (25%)
Query: 88 YLWFVGEMGREKATSLLEREA-DGTYLLRIRPQGPTHPNETI---YALSLKTDEKVKHMK 143
W+ G + R KA LL + DG++L+R +E++ YAL + V +
Sbjct: 3 PPWYHGNITRSKAEELLSKAGKDGSFLVR--------DSESVSGAYALCVLYQNCVHTYR 54
Query: 144 VYEKEMDGVPQYFLS-------QSRYFRSIVELICCYERNSLIENFIGLNVRLQLP 192
+ D LS R+F ++ ELI Y++ EN +GL L P
Sbjct: 55 ILPNAED-----KLSVQASEGVPVRFFTTLPELIEFYQK----EN-MGLVTHLLYP 100
>gnl|CDD|212990 cd12057, SH3_CIN85_3, Third Src Homology 3 domain (SH3C) of
Cbl-interacting protein of 85 kDa. CIN85, also called
SH3 domain-containing kinase-binding protein 1 (SH3KBP1)
or CD2-binding protein 3 (CD2BP3) or Ruk, is an adaptor
protein that is involved in the downregulation of
receptor tyrosine kinases by facilitating endocytosis
through interaction with endophilin-associated ubiquitin
ligase Cbl proteins. It is also important in many other
cellular processes including vesicle-mediated transport,
cytoskeletal remodelling, apoptosis, cell adhesion and
migration, and viral infection, among others. CIN85
exists as multiple variants from alternative splicing;
the main variant contains three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CIN85 to bind
various protein partners and assemble complexes that
have been implicated in many different functions. This
alignment model represents the third SH3 domain (SH3C)
of CIN85. SH3C has been shown to bind ubiquitin. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 56
Score = 32.2 bits (73), Expect = 0.027
Identities = 15/42 (35%), Positives = 26/42 (61%), Gaps = 3/42 (7%)
Query: 206 PTEA---NQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
P EA ++L +K+G V ++SK+ GWW+G+++ R F
Sbjct: 7 PYEAQNEDELTIKEGDIVTLISKDCIDAGWWEGELNGRRGVF 48
>gnl|CDD|212839 cd11906, SH3_BTK, Src Homology 3 domain of Bruton's tyrosine
kinase. BTK is a cytoplasmic (or nonreceptor) tyr
kinase containing Src homology protein interaction
domains (SH3, SH2) N-terminal to the catalytic tyr
kinase domain. It also contains an N-terminal pleckstrin
homology (PH) domain, which binds the products of PI3K
and allows membrane recruitment and activation, and the
Tec homology (TH) domain with proline-rich and
zinc-binding regions. Btk is expressed in B-cells, and a
variety of myeloid cells including mast cells,
platelets, neutrophils, and dendrictic cells. It
interacts with a variety of partners, from cytosolic
proteins to nuclear transcription factors, suggesting a
diversity of functions. Stimulation of a diverse array
of cell surface receptors, including antigen engagement
of the B-cell receptor (BCR), leads to PH-mediated
membrane translocation of Btk and subsequent
phosphorylation by Src kinase and activation. Btk plays
an important role in the life cycle of B-cells including
their development, differentiation, proliferation,
survival, and apoptosis. Mutations in Btk cause the
primary immunodeficiency disease, X-linked
agammaglobulinaemia (XLA) in humans. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 32.1 bits (73), Expect = 0.030
Identities = 12/38 (31%), Positives = 21/38 (55%), Gaps = 2/38 (5%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGK 236
VA +D+ P A L L++G + ++L E WW+ +
Sbjct: 4 VALYDYTPMNAQDLQLRKGEEYVIL--EESNLPWWRAR 39
>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 = 33.2 bits (76), Expect = 0.030
Identities = 21/61 (34%), Positives = 30/61 (49%), Gaps = 4/61 (6%)
Query: 85 LSEYLWFVGEMGREKATSL-LEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMK 143
LSEY WF G + R A L L ADG + +R Q T E + L+ + KH++
Sbjct: 5 LSEYPWFHGTLSRSDAAQLVLHSGADGHGVFLVR-QSETRRGE--FVLTFNFQGRAKHLR 61
Query: 144 V 144
+
Sbjct: 62 L 62
>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 = 31.9 bits (73), Expect = 0.033
Identities = 12/45 (26%), Positives = 27/45 (60%), Gaps = 2/45 (4%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
A+F+F T ++L +G +I +++ + GWW+G ++ + +F
Sbjct: 4 AKFNFEGTNEDELSFDKG-DIITVTQV-VEGGWWEGTLNGKTGWF 46
>gnl|CDD|212716 cd11782, SH3_Sorbs_2, Second Src Homology 3 domain of Sorbin and
SH3 domain containing (Sorbs) proteins and similar
domains. This family, also called the vinexin family,
is composed predominantly of adaptor proteins containing
one sorbin homology (SoHo) and three SH3 domains.
Members include the second SH3 domains of Sorbs1 (or
ponsin), Sorbs2 (or ArgBP2), Vinexin (or Sorbs3), and
similar domains. They are involved in the regulation of
cytoskeletal organization, cell adhesion, and growth
factor signaling. Members of this family bind multiple
partners including signaling molecules like c-Abl,
c-Arg, Sos, and c-Cbl, as well as cytoskeletal molecules
such as vinculin and afadin. They may have overlapping
functions. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 31.6 bits (72), Expect = 0.048
Identities = 15/51 (29%), Positives = 28/51 (54%), Gaps = 7/51 (13%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDER-----VSY 243
A A+++F +L ++G VI L++ ++ W++G+I R VSY
Sbjct: 2 ARAKYNFNADTGVELSFRKG-DVITLTRRVDEN-WYEGRIGGRQGIFPVSY 50
>gnl|CDD|212758 cd11824, SH3_PSTPIP1, Src homology 3 domain of
Proline-Serine-Threonine Phosphatase-Interacting Protein
1. PSTPIP1, also called CD2 Binding Protein 1 (CD2BP1),
is mainly expressed in hematopoietic cells. It is a
binding partner of the cell surface receptor CD2 and
PTP-PEST, a tyrosine phosphatase which functions in cell
motility and Rac1 regulation. It also plays a role in
the activation of the Wiskott-Aldrich syndrome protein
(WASP), which couples actin rearrangement and T cell
activation. Mutations in the gene encoding PSTPIP1 cause
the autoinflammatory disorder known as PAPA (pyogenic
sterile arthritis, pyoderma gangrenosum, and acne)
syndrome. PSTPIP1 contains an N-terminal F-BAR domain,
PEST motifs, and a C-terminal SH3 domain. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 31.2 bits (71), Expect = 0.050
Identities = 10/37 (27%), Positives = 18/37 (48%), Gaps = 2/37 (5%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWK 234
+D+ E ++L + +G V V+ K + GWW
Sbjct: 2 YSVLYDYTAQEDDELSISKGDVVAVIEK--GEDGWWT 36
>gnl|CDD|212696 cd11762, SH3_FCHSD_2, Second Src Homology 3 domain of FCH and
double SH3 domains proteins. This group is composed of
FCH and double SH3 domains protein 1 (FCHSD1) and
FCHSD2. These proteins have a common domain structure
consisting of an N-terminal F-BAR (FES-CIP4 Homology and
Bin/Amphiphysin/Rvs), two SH3, and C-terminal
proline-rich domains. They have only been characterized
in silico and their functions remain unknown. This group
also includes the insect protein, nervous wreck, which
acts as a regulator of synaptic growth signaling. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 31.2 bits (71), Expect = 0.053
Identities = 14/47 (29%), Positives = 24/47 (51%), Gaps = 2/47 (4%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKE--GEQKGWWKGKIDERVSYF 244
A +D+ +L +G + +L K+ G GWW+G+ + RV F
Sbjct: 4 ALYDYEAQSDEELSFPEGAIIRILRKDDNGVDDGWWEGEFNGRVGVF 50
>gnl|CDD|212993 cd12060, SH3_alphaPIX, Src Homology 3 domain of alpha-Pak
Interactive eXchange factor. Alpha-PIX, also called Rho
guanine nucleotide exchange factor 6 (ARHGEF6) or Cool
(Cloned out of Library)-2, activates small GTPases by
exchanging bound GDP for free GTP. It acts as a GEF for
both Cdc42 and Rac 1, and is localized in dendritic
spines where it regulates spine morphogenesis. It
controls dendritic length and spine density in the
hippocampus. Mutations in the ARHGEF6 gene cause
X-linked intellectual disability in humans. PIX proteins
contain an N-terminal SH3 domain followed by RhoGEF
(also called Dbl-homologous or DH) and Pleckstrin
Homology (PH) domains, and a C-terminal leucine-zipper
domain for dimerization. The SH3 domain of PIX binds to
an atypical PxxxPR motif in p21-activated kinases (PAKs)
with high affinity. The binding of PAKs to PIX
facilitate the localization of PAKs to focal complexes
and also localizes PAKs to PIX targets Cdc43 and Rac,
leading to the activation of PAKs. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 31.5 bits (71), Expect = 0.054
Identities = 15/59 (25%), Positives = 33/59 (55%), Gaps = 2/59 (3%)
Query: 195 QIIAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYFFQLYWGNFR 253
Q++ A F+F T ++L + +G +I +++ E+ GWW+G ++ + +F Y +
Sbjct: 1 QLVVKARFNFKQTNEDELSVCKG-DIIYVTRV-EEGGWWEGTLNGKTGWFPSNYVREIK 57
>gnl|CDD|212979 cd12046, SH3_p67phox_C, C-terminal (or second) Src Homology 3
domain of the p67phox subunit of NADPH oxidase.
p67phox, also called Neutrophil cytosol factor 2
(NCF-2), is a cytosolic subunit of the phagocytic NADPH
oxidase complex (also called Nox2 or gp91phox) which
plays a crucial role in the cellular response to
bacterial infection. NADPH oxidase catalyzes the
transfer of electrons from NADPH to oxygen during
phagocytosis forming superoxide and reactive oxygen
species. p67phox plays a regulatory role and contains
N-terminal TPR, first SH3 (or N-terminal or central
SH3), PB1, and C-terminal SH3 domains. It binds, via its
C-terminal SH3 domain, to a proline-rich region of
p47phox and upon activation, this complex assembles with
flavocytochrome b558, the Nox2-p22phox heterodimer.
Concurrently, RacGTP translocates to the membrane and
interacts with the TPR domain of p67phox, which leads to
the activation of NADPH oxidase. The PB1 domain of
p67phox binds to its partner PB1 domain in p40phox, and
this facilitates the assembly of p47phox-p67phox at the
membrane. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 30.9 bits (70), Expect = 0.062
Identities = 13/46 (28%), Positives = 24/46 (52%), Gaps = 2/46 (4%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
VA F + ++ L ++G ++VLSK E W +G+ ++ F
Sbjct: 3 VALFSYEASQPEDLEFQKGDVILVLSKVNED--WLEGQCKGKIGIF 46
>gnl|CDD|212928 cd11995, SH3_Intersectin1_5, Fifth Src homology 3 domain (or SH3E)
of Intersectin-1. Intersectin-1 (ITSN1) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN1 localizes in membranous organelles, CCPs, the
Golgi complex, and may be involved in the cell membrane
trafficking system. It exists in alternatively spliced
short and long isoforms. The short isoform contains two
Eps15 homology domains (EH1 and EH2), a coiled-coil
region and five SH3 domains (SH3A-E), while the long
isoform, in addition, contains RhoGEF (also called
Dbl-homologous or DH), Pleckstrin homology (PH) and C2
domains. The fifth SH3 domain (or SH3E) of ITSN1 has
been shown to bind many protein partners including
SGIP1, Sos1, dynamin1/2, CIN85, c-Cbl, SHIP2, N-WASP,
and synaptojanin-1, among others. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 54
Score = 31.1 bits (70), Expect = 0.065
Identities = 15/50 (30%), Positives = 28/50 (56%), Gaps = 4/50 (8%)
Query: 195 QIIAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
Q+I + +D+ ++L +G + VL+KE WWKG+++ +V F
Sbjct: 2 QVIGM--YDYTAQNDDELAFSKGQIINVLNKE--DPDWWKGELNGQVGLF 47
>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 = 32.7 bits (75), Expect = 0.065
Identities = 25/106 (23%), Positives = 51/106 (48%), Gaps = 12/106 (11%)
Query: 80 ADHENLSEYLWFVGEMGREKATSLLEREA-DGTYLLR-IRPQGPTHPNETIYALSLKTDE 137
+ +L W+ G + R++A L R DGT+L+R + + P Y L + ++
Sbjct: 3 EEEADLLPKEWYAGNIDRKEAEEALRRSNKDGTFLVRDSSGKDSSQP----YTLMVLYND 58
Query: 138 KVKHMKVYEKEMDGVPQYFL----SQSRYFRSIVELICCYERNSLI 179
KV ++++ + ++ QY L F S+ E+I +++ L+
Sbjct: 59 KVYNIQI--RFLENTRQYALGTGLRGEETFSSVAEIIEHHQKTPLL 102
>gnl|CDD|212772 cd11838, SH3_Intersectin_3, Third Src homology 3 domain (or SH3C)
of Intersectin. Intersectins (ITSNs) are adaptor
proteins that function in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction.
They are essential for initiating clathrin-coated pit
formation. They bind to many proteins through their
multidomain structure and facilitate the assembly of
multimeric complexes. Vertebrates contain two ITSN
proteins, ITSN1 and ITSN2, which exist in alternatively
spliced short and long isoforms. The short isoforms
contain two Eps15 homology domains (EH1 and EH2), a
coiled-coil region and five SH3 domains (SH3A-E), while
the long isoforms, in addition, contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin homology (PH)
and C2 domains. ITSN1 and ITSN2 are both widely
expressed, with variations depending on tissue type and
stage of development. The third SH3 domain (or SH3C) of
ITSN1 has been shown to bind many proteins including
dynamin1/2, CIN85, c-Cbl, SHIP2, Reps1, synaptojanin-1,
and WNK, among others. The SH3C of ITSN2 has been shown
to bind the K15 protein of Kaposi's sarcoma-associated
herpesvirus. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 30.8 bits (70), Expect = 0.074
Identities = 14/46 (30%), Positives = 21/46 (45%), Gaps = 3/46 (6%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
+A + + E L G ++V K+GE WW G I +R F
Sbjct: 3 IALYPYESNEPGDLTFNAGDVILVTKKDGE---WWTGTIGDRTGIF 45
>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 = 31.8 bits (72), Expect = 0.078
Identities = 27/97 (27%), Positives = 45/97 (46%), Gaps = 12/97 (12%)
Query: 82 HENLSEYLWFVGEMGREKATSLLER---EADGTYLLRIRPQGPTHPNETIYALSLKTDEK 138
LS Y WF G + R KA L++ +A G +L+R Q T E Y L+ +
Sbjct: 2 DHFLSCYPWFHGPISRVKAAQLVQLQGPDAHGVFLVR---QSETRRGE--YVLTFNFQGR 56
Query: 139 VKHMKVYEKEMDGVPQYFLSQSRYFRSIVELICCYER 175
KH+++ E Q +F S+V+++ ++R
Sbjct: 57 AKHLRLSLTERGQCR----VQHLHFPSVVDMLHHFQR 89
>gnl|CDD|212774 cd11840, SH3_Intersectin_5, Fifth Src homology 3 domain (or SH3E)
of Intersectin. Intersectins (ITSNs) are adaptor
proteins that function in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction.
They are essential for initiating clathrin-coated pit
formation. They bind to many proteins through their
multidomain structure and facilitate the assembly of
multimeric complexes. Vertebrates contain two ITSN
proteins, ITSN1 and ITSN2, which exist in alternatively
spliced short and long isoforms. The short isoforms
contain two Eps15 homology domains (EH1 and EH2), a
coiled-coil region and five SH3 domains (SH3A-E), while
the long isoforms, in addition, contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin homology (PH)
and C2 domains. ITSN1 and ITSN2 are both widely
expressed, with variations depending on tissue type and
stage of development. The fifth SH3 domain (or SH3E) of
ITSN1 has been shown to bind many protein partners
including SGIP1, Sos1, dynamin1/2, CIN85, c-Cbl, SHIP2,
N-WASP, and synaptojanin-1, among others. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 30.8 bits (70), Expect = 0.082
Identities = 14/50 (28%), Positives = 28/50 (56%), Gaps = 4/50 (8%)
Query: 195 QIIAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
Q+IA+ F + ++L ++G + VLSK+ WW+G+++ + F
Sbjct: 1 QVIAL--FPYTAQNEDELSFQKGDIINVLSKD--DPDWWRGELNGQTGLF 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 = 30.7 bits (69), Expect = 0.088
Identities = 13/46 (28%), Positives = 23/46 (50%), Gaps = 3/46 (6%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
VA + + E L +QG ++V K+G+ WW G + ++ F
Sbjct: 3 VAMYTYESNEQGDLTFQQGDVILVTKKDGD---WWTGTVGDKTGVF 45
>gnl|CDD|212773 cd11839, SH3_Intersectin_4, Fourth Src homology 3 domain (or SH3D)
of Intersectin. Intersectins (ITSNs) are adaptor
proteins that function in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction.
They are essential for initiating clathrin-coated pit
formation. They bind to many proteins through their
multidomain structure and facilitate the assembly of
multimeric complexes. Vertebrates contain two ITSN
proteins, ITSN1 and ITSN2, which exist in alternatively
spliced short and long isoforms. The short isoforms
contain two Eps15 homology domains (EH1 and EH2), a
coiled-coil region and five SH3 domains (SH3A-E), while
the long isoforms, in addition, contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin homology (PH)
and C2 domains. ITSN1 and ITSN2 are both widely
expressed, with variations depending on tissue type and
stage of development. The fourth SH3 domain (or SH3D) of
ITSN1 has been shown to bind SHIP2, Numb, CdGAP, and
N-WASP. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 30.8 bits (70), Expect = 0.090
Identities = 15/38 (39%), Positives = 19/38 (50%), Gaps = 2/38 (5%)
Query: 203 DFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDER 240
F T NQL L G V+V K GWW+G++ R
Sbjct: 7 PFTATAENQLSLAVGQLVLVRKKSP--SGWWEGELQAR 42
>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 = 0.091
Identities = 18/55 (32%), Positives = 29/55 (52%), Gaps = 6/55 (10%)
Query: 90 WFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKV 144
WF G + RE A ++LE + G++L+R+ +H + Y LS K +H V
Sbjct: 9 WFHGAISREAAENMLESQPLGSFLIRV-----SH-SHVGYTLSYKAQSSCRHFMV 57
>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 = 31.5 bits (71), Expect = 0.10
Identities = 27/89 (30%), Positives = 43/89 (48%), Gaps = 12/89 (13%)
Query: 85 LSEYLWFVGEMGREKATSLL---EREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKH 141
LS Y WF G + R KA L+ + G +L+R Q T E Y L+ K KH
Sbjct: 5 LSGYPWFHGMLSRLKAAQLVLEGGTGSHGVFLVR---QSETRRGE--YVLTFNFQGKAKH 59
Query: 142 MKVYEKEMDGVPQYFLSQSRYFRSIVELI 170
+++ E +G + Q +F+SI +++
Sbjct: 60 LRLSLNE-EGQCRV---QHLWFQSIFDML 84
>gnl|CDD|212896 cd11963, SH3_STAM2, Src homology 3 domain of Signal Transducing
Adaptor Molecule 2. STAM2, also called EAST (Epidermal
growth factor receptor-associated protein with SH3 and
TAM domain) or Hbp (Hrs binding protein), is part of the
endosomal sorting complex required for transport
(ESCRT-0). It plays a role in sorting mono-ubiquinated
endosomal cargo for trafficking to the lysosome for
degradation. It is also involved in the regulation of
exocytosis. STAMs were discovered as proteins that are
highly phosphorylated following cytokine and growth
factor stimulation. They function in cytokine signaling
and surface receptor degradation, as well as regulate
Golgi morphology. They associate with many proteins
including Jak2 and Jak3 tyrosine kinases, Hrs, AMSH, and
UBPY. STAM adaptor proteins contain VHS (Vps27, Hrs,
STAM homology), ubiquitin interacting (UIM), and SH3
domains. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 30.4 bits (68), Expect = 0.11
Identities = 17/45 (37%), Positives = 22/45 (48%), Gaps = 2/45 (4%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
A +DF E N+L K G +IVL + WWKG+ V F
Sbjct: 6 ALYDFEAVEDNELTFKHGEIIIVL--DDSDANWWKGENHRGVGLF 48
>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 = 30.4 bits (68), Expect = 0.11
Identities = 15/45 (33%), Positives = 27/45 (60%), Gaps = 2/45 (4%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
A+F+F T ++L +G VI +++ E+ GWW+G + R +F
Sbjct: 4 AKFNFQQTNEDELSFSKG-DVIHVTRV-EEGGWWEGTHNGRTGWF 46
>gnl|CDD|212741 cd11807, SH3_ASPP, Src homology 3 domain of Apoptosis Stimulating
of p53 proteins (ASPP). The ASPP family of proteins
bind to important regulators of apoptosis (p53, Bcl-2,
and RelA) and cell growth (APCL, PP1). They share
similarity at their C-termini, where they harbor a
proline-rich region, four ankyrin (ANK) repeats, and an
SH3 domain. Vertebrates contain three members of the
family: ASPP1, ASPP2, and iASPP. ASPP1 and ASPP2
activate the apoptotic function of the p53 family of
tumor suppressors (p53, p63, and p73), while iASPP is an
oncoprotein that specifically inhibits p53-induced
apoptosis. The expression of ASPP proteins is altered in
tumors; ASPP1 and ASPP2 are downregulated whereas iASPP
is upregulated is some cancer types. ASPP proteins also
bind and regulate protein phosphatase 1 (PP1), and this
binding is competitive with p53 binding. The SH3 domain
and the ANK repeats of ASPP contribute to the p53
binding site; they bind to the DNA binding domain of
p53. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 30.4 bits (69), Expect = 0.11
Identities = 11/45 (24%), Positives = 25/45 (55%), Gaps = 1/45 (2%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGE-QKGWWKGKIDERVSY 243
A FD+ ++L ++G ++ VL K + + WW +++++ Y
Sbjct: 5 ALFDYEAENGDELSFREGDELTVLRKGDDDETEWWWARLNDKEGY 49
>gnl|CDD|212930 cd11997, SH3_PACSIN3, Src homology 3 domain of Protein kinase C and
Casein kinase Substrate in Neurons 3 (PACSIN3). PACSIN
3 or Syndapin III (Synaptic dynamin-associated protein
III) is expressed ubiquitously and regulates glucose
uptake in adipocytes through its role in GLUT1
trafficking. It also modulates the subcellular
localization and stimulus-specific function of the
cation channel TRPV4. PACSINs act as regulators of
cytoskeletal and membrane dynamics. Vetebrates harbor
three isoforms with distinct expression patterns and
specific functions. PACSINs contain an N-terminal F-BAR
domain and a C-terminal SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 30.3 bits (68), Expect = 0.12
Identities = 14/38 (36%), Positives = 25/38 (65%), Gaps = 1/38 (2%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKI 237
A +D+ EA++L K G +++ + +E EQ GW KG++
Sbjct: 6 ALYDYTGQEADELSFKAGEELLKIGEEDEQ-GWCKGRL 42
>gnl|CDD|212784 cd11850, SH3_Abl, Src homology 3 domain of the Protein Tyrosine
Kinase, Abelson kinase. Abl (or c-Abl) is a
ubiquitously-expressed cytoplasmic (or nonreceptor) PTK
that contains SH3, SH2, and tyr kinase domains in its
N-terminal region, as well as nuclear localization
motifs, a putative DNA-binding domain, and F- and
G-actin binding domains in its C-terminal tail. It also
contains a short autoinhibitory cap region in its
N-terminus. Abl function depends on its subcellular
localization. In the cytoplasm, Abl plays a role in cell
proliferation and survival. In response to DNA damage or
oxidative stress, Abl is transported to the nucleus
where it induces apoptosis. In chronic myelogenous
leukemia (CML) patients, an aberrant translocation
results in the replacement of the first exon of Abl with
the BCR (breakpoint cluster region) gene. The resulting
BCR-Abl fusion protein is constitutively active and
associates into tetramers, resulting in a hyperactive
kinase sending a continuous signal. This leads to
uncontrolled proliferation, morphological transformation
and anti-apoptotic effects. BCR-Abl is the target of
selective inhibitors, such as imatinib (Gleevec), used
in the treatment of CML. Abl2, also known as ARG
(Abelson-related gene), is thought to play a cooperative
role with Abl in the proper development of the nervous
system. The Tel-ARG fusion protein, resulting from
reciprocal translocation between chromosomes 1 and 12,
is associated with acute myeloid leukemia (AML). SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 56
Score = 30.5 bits (69), Expect = 0.12
Identities = 15/32 (46%), Positives = 21/32 (65%), Gaps = 2/32 (6%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVL--SKEGE 228
VA +DF + NQL +K+G Q+ VL +K GE
Sbjct: 3 VALYDFVASGENQLSIKKGEQLRVLGYNKNGE 34
>gnl|CDD|198250 cd10387, SH2_SOCS6, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 100
Score = 31.3 bits (71), Expect = 0.13
Identities = 23/94 (24%), Positives = 41/94 (43%), Gaps = 6/94 (6%)
Query: 84 NLSEYLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMK 143
L++ W+ G + R +A L DG++L+R + + + +LS ++ K H +
Sbjct: 6 KLAKQGWYWGPITRWEAEGKLANVPDGSFLVR-----DSSDDRYLLSLSFRSHGKTLHTR 60
Query: 144 VYEKEMDGVPQYFLSQSRYFRSIVELICCYERNS 177
+ E Y SIV+LI R+S
Sbjct: 61 I-EHSNGRFSFYEQPDVEGHTSIVDLIEHSIRDS 93
>gnl|CDD|212888 cd11955, SH3_srGAP1-3, Src homology 3 domain of Slit-Robo GTPase
Activating Proteins 1, 2, and 3. srGAP1, also called
Rho GTPase-Activating Protein 13 (ARHGAP13), is a Cdc42-
and RhoA-specific GAP and is expressed later in the
development of central nervous system tissues. srGAP2 is
expressed in zones of neuronal differentiation. It plays
a role in the regeneration of neurons and axons. srGAP3,
also called MEGAP (MEntal disorder associated
GTPase-Activating Protein), is a Rho GAP with activity
towards Rac1 and Cdc42. It impacts cell migration by
regulating actin and microtubule cytoskeletal dynamics.
The association between srGAP3 haploinsufficiency and
mental retardation is under debate. srGAPs are Rho GAPs
that interact with Robo1, the transmembrane receptor of
Slit proteins. Slit proteins are secreted proteins that
control axon guidance and the migration of neurons and
leukocytes. srGAPs contain an N-terminal F-BAR domain, a
Rho GAP domain, and a C-terminal SH3 domain. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 29.9 bits (67), Expect = 0.14
Identities = 11/39 (28%), Positives = 23/39 (58%), Gaps = 2/39 (5%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGK 236
A+A+FD+ A +L K+G +++ + + WW+G+
Sbjct: 2 AIAKFDYVGRSARELSFKKGASLLLYHRASDD--WWEGR 38
>gnl|CDD|212889 cd11956, SH3_srGAP4, Src homology 3 domain of Slit-Robo GTPase
Activating Protein 4. srGAP4, also called ARHGAP4, is
highly expressed in hematopoietic cells and may play a
role in lymphocyte differentiation. It is able to
stimulate the GTPase activity of Rac1, Cdc42, and RhoA.
In the nervous system, srGAP4 has been detected in
differentiating neurites and may be involved in axon and
dendritic growth. srGAPs are Rho GAPs that interact with
Robo1, the transmembrane receptor of Slit proteins. Slit
proteins are secreted proteins that control axon
guidance and the migration of neurons and leukocytes.
srGAPs contain an N-terminal F-BAR domain, a Rho GAP
domain, and a C-terminal SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 29.8 bits (67), Expect = 0.17
Identities = 14/40 (35%), Positives = 22/40 (55%), Gaps = 2/40 (5%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKI 237
AVA FD+ A +L K+G +++ SK WW+G+
Sbjct: 4 AVACFDYTGRTAQELSFKRGDVLLLHSKASSD--WWRGEH 41
>gnl|CDD|212938 cd12005, SH3_Lck, Src homology 3 domain of Lck Protein Tyrosine
Kinase. Lck is a member of the Src subfamily of
proteins, which are cytoplasmic (or non-receptor) PTKs.
Lck is expressed in T-cells and natural killer cells. It
plays a critical role in T-cell maturation, activation,
and T-cell receptor (TCR) signaling. Lck phosphorylates
ITAM (immunoreceptor tyr activation motif) sequences on
several subunits of TCRs, leading to the activation of
different second messenger cascades. Phosphorylated
ITAMs serve as binding sites for other signaling factor
such as Syk and ZAP-70, leading to their activation and
propagation of downstream events. In addition, Lck
regulates drug-induced apoptosis by interfering with the
mitochondrial death pathway. The apototic role of Lck is
independent of its primary function in T-cell signaling.
Src kinases contain an N-terminal SH4 domain with a
myristoylation site, followed by SH3 and SH2 domains, a
tyr kinase domain, and a regulatory C-terminal region
containing a conserved tyr. They are activated by
autophosphorylation at the tyr kinase domain, but are
negatively regulated by phosphorylation at the
C-terminal tyr by Csk (C-terminal Src Kinase). The SH3
domain of Src kinases contributes to substrate
recruitment by binding adaptor proteins/substrates, and
regulation of kinase activity through an intramolecular
interaction. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 29.8 bits (67), Expect = 0.17
Identities = 11/38 (28%), Positives = 21/38 (55%), Gaps = 3/38 (7%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGK 236
VA + + P+ L ++G ++ +L + GE WWK +
Sbjct: 3 VALYSYEPSHDGDLGFEKGEKLRILEQSGE---WWKAQ 37
>gnl|CDD|212886 cd11953, SH3_ASPP2, Src Homology 3 (SH3) domain of Apoptosis
Stimulating of p53 protein 2. ASPP2 is the full length
form of the previously-identified tumor supressor,
p53-binding protein 2 (p53BP2). ASPP2 activates the
apoptotic function of the p53 family of tumor
suppressors (p53, p63, and p73). It plays a central role
in regulating apoptosis and cell growth; ASPP2-deficient
mice show postnatal death. Downregulated expression of
ASPP2 is frequently found in breast tumors, lung cancer,
and diffuse large B-cell lymphoma where it is correlated
with a poor clinical outcome. ASPP2 contains a
proline-rich region, four ankyrin (ANK) repeats, and an
SH3 domain at its C-terminal half. The SH3 domain and
the ANK repeats of ASPP2 contribute to the p53 binding
site; they bind to the DNA binding domain of p53. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 29.9 bits (67), Expect = 0.18
Identities = 10/45 (22%), Positives = 25/45 (55%), Gaps = 1/45 (2%)
Query: 200 AEFDFCPTEANQLPLKQG-CQVIVLSKEGEQKGWWKGKIDERVSY 243
A +D+ ++L K+G C I+ ++ ++ WW +++++ Y
Sbjct: 5 ALWDYEGESDDELSFKEGDCMTILRREDEDETEWWWARLNDKEGY 49
>gnl|CDD|212697 cd11763, SH3_SNX9_like, Src Homology 3 domain of Sorting Nexin 9
and similar proteins. Sorting nexins (SNXs) are Phox
homology (PX) domain containing proteins that are
involved in regulating membrane traffic and protein
sorting in the endosomal system. SNXs differ from each
other in their lipid-binding specificity, subcellular
localization and specific function in the endocytic
pathway. This subfamily consists of SH3 domain
containing SNXs including SNX9, SNX18, SNX33, and
similar proteins. SNX9 is localized to plasma membrane
endocytic sites and acts primarily in clathrin-mediated
endocytosis, while SNX18 is localized to peripheral
endosomal structures, and acts in a trafficking pathway
that is clathrin-independent but relies on AP-1 and
PACS1. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 30.0 bits (68), Expect = 0.18
Identities = 10/37 (27%), Positives = 22/37 (59%), Gaps = 1/37 (2%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGK 236
A +DF + +L L+ G +V+ ++++ GW +G+
Sbjct: 4 ALYDFDSQPSGELSLRAG-EVLTITRQDVGDGWLEGR 39
>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 = 29.7 bits (68), Expect = 0.21
Identities = 17/47 (36%), Positives = 24/47 (51%), Gaps = 2/47 (4%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
FD+ T+ N+L LK+G V VL K+ GWW+G+ R
Sbjct: 2 GRVIFDYVATDPNELSLKKGDVVKVLDKDDN--GWWEGERGGRRGLV 46
>gnl|CDD|212977 cd12044, SH3_SKAP1, Src Homology 3 domain of Src Kinase-Associated
Phosphoprotein 1. SKAP1, also called SKAP55 (Src
kinase-associated protein of 55kDa), is an immune
cell-specific adaptor protein that plays an important
role in T-cell adhesion, migration, and integrin
clustering. It is expressed exclusively in
T-lymphocytes, mast cells, and macrophages. Binding
partners include ADAP (adhesion and
degranulation-promoting adaptor protein), Fyn, Riam,
RapL, and RasGRP. It contains a pleckstrin homology (PH)
domain, a C-terminal SH3 domain, and several tyrosine
phosphorylation sites. The SH3 domain of SKAP1 is
necessary for its ability to regulate T-cell conjugation
with antigen-presenting cells and the formation of LFA-1
clusters. SKAP1 binds primarily to a proline-rich region
of ADAP through its SH3 domain; its degradation is
regulated by ADAP. A secondary interaction occurs via
the ADAP SH3 domain and the RKxxYxxY motif in SKAP1. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 29.4 bits (66), Expect = 0.23
Identities = 11/34 (32%), Positives = 20/34 (58%)
Query: 208 EANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERV 241
++L ++G + +LSKE GWW G+++ V
Sbjct: 12 NPDELSFQRGDLIYILSKEYNMYGWWVGELNGIV 45
>gnl|CDD|212987 cd12054, SH3_CD2AP_2, Second Src Homology 3 domain (SH3B) of
CD2-associated protein. CD2AP, also called CMS (Cas
ligand with Multiple SH3 domains) or METS1
(Mesenchyme-to-Epithelium Transition protein with SH3
domains), is a cytosolic adaptor protein that plays a
role in regulating the cytoskeleton. It is critical in
cell-to-cell union necessary for kidney function. It
also stabilizes the contact between a T cell and
antigen-presenting cells. It is primarily expressed in
podocytes at the cytoplasmic face of the slit diaphragm
and serves as a linker anchoring podocin and nephrin to
the actin cytoskeleton. CD2AP contains three SH3
domains, a proline-rich region, and a C-terminal
coiled-coil domain. All of these domains enable CD2AP to
bind various protein partners and assemble complexes
that have been implicated in many different functions.
This alignment model represents the second SH3 domain
(SH3B) of CD2AP. SH3B binds to c-Cbl in a site (TPSSRPLR
is the core binding motif) distinct from the c-Cbl/SH3A
binding site. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 29.6 bits (66), Expect = 0.25
Identities = 14/43 (32%), Positives = 26/43 (60%), Gaps = 2/43 (4%)
Query: 202 FDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
F++ P ++L LK G +I +++E E+ GWW G ++ + F
Sbjct: 7 FEYVPQNEDELELKVG-DIIDINEEVEE-GWWSGTLNGKSGLF 47
>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 = 29.6 bits (66), Expect = 0.25
Identities = 14/41 (34%), Positives = 28/41 (68%), Gaps = 1/41 (2%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKID 238
A+A++DF T ++L K+G + VL++E +Q W+K +++
Sbjct: 3 AIAKYDFKATADDELSFKRGDILKVLNEECDQN-WYKAELN 42
>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 = 30.7 bits (69), Expect = 0.27
Identities = 18/54 (33%), Positives = 28/54 (51%), Gaps = 10/54 (18%)
Query: 90 WFVGEMGREKATSLLEREADGTYLLRI--RPQGPTHPNETIYALSLKTDEKVKH 141
WF G + +KA LL G++L+R+ + +G YALS ++E KH
Sbjct: 9 WFHGILTLKKANELLLSTMPGSFLIRVSEKIKG--------YALSYLSEEGCKH 54
>gnl|CDD|198178 cd09923, SH2_SOCS_family, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) family. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 81
Score = 29.9 bits (68), Expect = 0.29
Identities = 20/88 (22%), Positives = 37/88 (42%), Gaps = 19/88 (21%)
Query: 90 WFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKV-YEKE 148
W+ G + R +A LL + +GT+L+R + ++++S +T + H ++ Y
Sbjct: 2 WYWGGITRYEAEELLAGKPEGTFLVRDSSD-----SRYLFSVSFRTYGRTLHARIEY--- 53
Query: 149 MDGVPQYFLSQS------RYFRSIVELI 170
S F +VELI
Sbjct: 54 ----SNGRFSFDSSDPSVPRFPCVVELI 77
>gnl|CDD|212931 cd11998, SH3_PACSIN1-2, Src homology 3 domain of Protein kinase C
and Casein kinase Substrate in Neurons 1 (PACSIN1) and
PACSIN 2. PACSIN 1 or Syndapin I (Synaptic
dynamin-associated protein I) is expressed specifically
in the brain and is localized in neurites and synaptic
boutons. It binds the brain-specific proteins dynamin I,
synaptojanin, synapsin I, and neural Wiskott-Aldrich
syndrome protein (nWASP), and functions as a link
between the cytoskeletal machinery and synaptic vesicle
endocytosis. PACSIN 1 interacts with huntingtin and may
be implicated in the neuropathology of Huntington's
disease. PACSIN 2 or Syndapin II is expressed
ubiquitously and is involved in the regulation of
tubulin polymerization. It associates with Golgi
membranes and forms a complex with dynamin II which is
crucial in promoting vesicle formation from the
trans-Golgi network. PACSINs act as regulators of
cytoskeletal and membrane dynamics. Vetebrates harbor
three isoforms with distinct expression patterns and
specific functions. PACSINs contain an N-terminal F-BAR
domain and a C-terminal SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 29.1 bits (65), Expect = 0.34
Identities = 15/39 (38%), Positives = 23/39 (58%), Gaps = 1/39 (2%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKID 238
A +D+ E ++L K G ++ L E EQ GW KG++D
Sbjct: 5 ALYDYDGQEQDELSFKAGDELTKLEDEDEQ-GWCKGRLD 42
>gnl|CDD|198175 cd09919, SH2_STAT_family, Src homology 2 (SH2) domain found in
signal transducer and activator of transcription (STAT)
family. STAT proteins mediate the signaling of
cytokines and a number of growth factors from the
receptors of these extracellular signaling molecules to
the cell nucleus. STATs are specifically phosphorylated
by receptor-associated Janus kinases, receptor tyrosine
kinases, or cytoplasmic tyrosine kinases. The
phosphorylated STAT molecules dimerize by reciprocal
binding of their SH2 domains to the phosphotyrosine
residues. These dimeric STATs translocate into the
nucleus, bind to specific DNA sequences, and regulate
the transcription of their target genes. However there
are a number of unphosphorylated STATs that travel
between the cytoplasm and nucleus and some STATs that
exist as dimers in unstimulated cells that can exert
biological functions independent of being activated by a
receptor. There are seven mammalian STAT family members
which have been identified: STAT1, STAT2, STAT3, STAT4,
STAT5 (STAT5A and STAT5B), and STAT6. There are 6
conserved domains in STAT: N-terminal domain (NTD),
coiled-coil domain (CCD), DNA-binding domain (DBD),
alpha-helical linker domain (LD), SH2 domain, and
transactivation domain (TAD). NTD is involved in
dimerization of unphosphorylated STATs monomers and for
the tetramerization between STAT1, STAT3, STAT4 and
STAT5 on promoters with two or more tandem STAT binding
sites. It also plays a role in promoting interactions
with transcriptional co-activators such as CREB binding
protein (CBP)/p300, as well as being important for
nuclear import and deactivation of STATs involving
tyrosine de-phosphorylation. The CCD interacts with
other proteins, such as IFN regulatory protein 9
(IRF-9/p48) with STAT1 and c-JUN with STAT3 and is also
thought to participate in the negative regulation of
these proteins. Distinct genes are bound to STATs via
their DBD domain. This domain is also involved in
nuclear translocation of activated STAT1 and STAT3
phosphorylated dimers upon cytokine stimulation. LD
links the DNA-binding and SH2 domains and is important
for the transcriptional activation of STAT1 in response
to IFN-gamma. It also plays a role in protein-protein
interactions and has also been implicated in the
constitutive nucleocytoplasmic shuttling of
unphosphorylated STATs in resting cells. The SH2 domain
is necessary for receptor association and tyrosine
phosphodimer formation. Residues within this domain may
be particularly important for some cellular functions
mediated by the STATs as well as residues adjacent to
this domain. The TAD interacts with several proteins,
namely minichromosome maintenance complex component 5
(MCM5), breast cancer 1 (BRCA1) and CBP/p300. TAD also
contains a modulatory phosphorylation site that
regulates STAT activity and is necessary for maximal
transcription of a number of target genes. The conserved
tyrosine residue present in the C-terminus is crucial
for dimerization via interaction with the SH2 domain
upon the interaction of the ligand with the receptor.
STAT activation by tyrosine phosphorylation also
determines nuclear import and retention, DNA binding to
specific DNA elements in the promoters of responsive
genes, and transcriptional activation of STAT dimers. In
addition to the SH2 domain there is a coiled-coil
domain, a DNA binding domain, and a transactivation
domain in the STAT proteins. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 115
Score = 30.2 bits (69), Expect = 0.40
Identities = 12/31 (38%), Positives = 20/31 (64%), Gaps = 4/31 (12%)
Query: 89 LWF----VGEMGREKATSLLEREADGTYLLR 115
LW +G + +E+A LL+++ GT+LLR
Sbjct: 16 LWQDGLIMGFISKEEAEDLLKKKPPGTFLLR 46
>gnl|CDD|212750 cd11816, SH3_Eve1_3, Third Src homology 3 domain of ADAM-binding
protein Eve-1. Eve-1, also called SH3 domain-containing
protein 19 (SH3D19) or EEN-binding protein (EBP), exists
in multiple alternatively spliced isoforms. The longest
isoform contains five SH3 domain in the C-terminal
region and seven proline-rich motifs in the N-terminal
region. It is abundantly expressed in skeletal muscle
and heart, and may be involved in regulating the
activity of ADAMs (A disintegrin and metalloproteases).
Eve-1 interacts with EEN, an endophilin involved in
endocytosis and may be the target of the MLL-EEN fusion
protein that is implicated in leukemogenesis. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 51
Score = 28.5 bits (64), Expect = 0.42
Identities = 13/47 (27%), Positives = 25/47 (53%), Gaps = 2/47 (4%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
VA FDF + ++L +G + + GE+ W KG+++ ++ F
Sbjct: 2 CVARFDFEGEQEDELSFSEGDVITLKEYVGEE--WAKGELNGKIGIF 46
>gnl|CDD|212978 cd12045, SH3_SKAP2, Src Homology 3 domain of Src Kinase-Associated
Phosphoprotein 2. SKAP2, also called SKAP55-Related
(SKAP55R) or SKAP55 homolog (SKAP-HOM or SKAP55-HOM), is
an immune cell-specific adaptor protein that plays an
important role in adhesion and migration of B-cells and
macrophages. Binding partners include ADAP (adhesion and
degranulation-promoting adaptor protein), YopH, SHPS1,
and HPK1. SKAP2 has also been identified as a substrate
for lymphoid-specific tyrosine phosphatase (Lyp), which
has been implicated in a wide variety of autoimmune
diseases. It contains a pleckstrin homology (PH) domain,
a C-terminal SH3 domain, and several tyrosine
phosphorylation sites. Like SKAP1, SKAP2 is expected to
bind primarily to a proline-rich region of ADAP through
its SH3 domain; its degradation may be regulated by
ADAP. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 28.7 bits (64), Expect = 0.52
Identities = 11/28 (39%), Positives = 19/28 (67%)
Query: 210 NQLPLKQGCQVIVLSKEGEQKGWWKGKI 237
++L K+G + +LSKE + GWW G++
Sbjct: 14 DELSFKRGDTIYILSKEYNRFGWWVGEM 41
>gnl|CDD|212882 cd11949, SH3_GRB2_C, C-terminal Src homology 3 domain of Growth
factor receptor-bound protein 2. GRB2 is a critical
signaling molecule that regulates the Ras pathway by
linking tyrosine kinases to the Ras guanine nucleotide
releasing protein Sos (son of sevenless), which converts
Ras to the active GTP-bound state. It is ubiquitously
expressed in all tissues throughout development and is
important in cell cycle progression, motility,
morphogenesis, and angiogenesis. In lymphocytes, GRB2 is
associated with antigen receptor signaling components.
GRB2 contains an N-terminal SH3 domain, a central SH2
domain, and a C-terminal SH3 domain. The C-terminal SH3
domain of GRB2 binds to Gab2 (Grb2-associated binder 2)
through epitopes containing RxxK motifs, as well as to
the proline-rich C-terminus of FGRF2. SH3 domains are
protein interaction domains that typically bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 28.7 bits (64), Expect = 0.55
Identities = 14/45 (31%), Positives = 21/45 (46%), Gaps = 2/45 (4%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
A FDF P E +L ++G + V+ + WWKG + F
Sbjct: 4 ALFDFDPQEDGELGFRRGDFIEVM--DNSDPNWWKGACHGQTGMF 46
>gnl|CDD|212754 cd11820, SH3_STAM, Src homology 3 domain of Signal Transducing
Adaptor Molecules. STAMs were discovered as proteins
that are highly phosphorylated following cytokine and
growth factor stimulation. They function in cytokine
signaling and surface receptor degradation, as well as
regulate Golgi morphology. They associate with many
proteins including Jak2 and Jak3 tyrosine kinases, Hrs,
AMSH, and UBPY. STAM adaptor proteins contain VHS
(Vps27, Hrs, STAM homology), ubiquitin interacting
(UIM), and SH3 domains. There are two vertebrate STAMs,
STAM1 and STAM2, which may be functionally redundant;
vertebrate STAMs contain ITAM motifs. They are part of
the endosomal sorting complex required for transport
(ESCRT-0). STAM2 deficiency in mice did not cause any
obvious abnormality, while STAM1 deficiency resulted in
growth retardation. Loss of both STAM1 and STAM2 in mice
proved lethal, indicating that STAMs are important for
embryonic development. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 28.2 bits (63), Expect = 0.80
Identities = 14/37 (37%), Positives = 18/37 (48%), Gaps = 2/37 (5%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGK 236
A +DF E N+L K G + VL + WWKG
Sbjct: 5 ALYDFEAAEDNELTFKAGEIITVL--DDSDPNWWKGS 39
>gnl|CDD|212856 cd11923, SH3_Sorbs2_2, Second Src Homology 3 domain of Sorbin and
SH3 domain containing 2 (Sorbs2), also called
Arg-binding protein 2 (ArgBP2). Sorbs2 or ArgBP2 is an
adaptor protein containing one sorbin homology (SoHo)
and three SH3 domains. It regulates actin-dependent
processes including cell adhesion, morphology, and
migration. It is expressed in many tissues and is
abundant in the heart. Like vinexin, it is found in
focal adhesion where it interacts with vinculin and
afadin. It also localizes in epithelial cell stress
fibers and in cardiac muscle cell Z-discs. Sorbs2 has
been implicated to play roles in the signaling of c-Arg,
Akt, and Pyk2. Other interaction partners of Sorbs2
include c-Abl, flotillin, spectrin, dynamin 1/2,
synaptojanin, PTP-PEST, among others. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 57
Score = 28.0 bits (62), Expect = 0.81
Identities = 13/40 (32%), Positives = 26/40 (65%), Gaps = 2/40 (5%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKI 237
AVA+++F +L L++G +V++L + + W++GKI
Sbjct: 3 AVAKYNFNADTNVELSLRKGDRVVLLKQ--VDQNWYEGKI 40
>gnl|CDD|212751 cd11817, SH3_Eve1_4, Fourth Src homology 3 domain of ADAM-binding
protein Eve-1. Eve-1, also called SH3 domain-containing
protein 19 (SH3D19) or EEN-binding protein (EBP), exists
in multiple alternatively spliced isoforms. The longest
isoform contains five SH3 domain in the C-terminal
region and seven proline-rich motifs in the N-terminal
region. It is abundantly expressed in skeletal muscle
and heart, and may be involved in regulating the
activity of ADAMs (A disintegrin and metalloproteases).
Eve-1 interacts with EEN, an endophilin involved in
endocytosis and may be the target of the MLL-EEN fusion
protein that is implicated in leukemogenesis. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 50
Score = 27.8 bits (62), Expect = 0.85
Identities = 12/47 (25%), Positives = 23/47 (48%), Gaps = 2/47 (4%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
AVA +DF L ++G +++V + W +G+++ R F
Sbjct: 2 AVALYDFTGETEEDLSFQRGDRILVTEHLDAE--WSRGRLNGREGIF 46
>gnl|CDD|212907 cd11974, SH3_ASEF2, Src homology 3 domain of APC-Stimulated guanine
nucleotide Exchange Factor 2. ASEF2, also called
Spermatogenesis-associated protein 13 (SPATA13), is a
GEF that localizes with actin at the leading edge of
cells and is important in cell migration and adhesion
dynamics. GEFs activate small GTPases by exchanging
bound GDP for free GTP. ASEF2 can activate both Rac 1
and Cdc42, but only Rac1 activation is necessary for
increased cell migration and adhesion turnover. Together
with APC (adenomatous polyposis coli) and Neurabin2, a
scaffold protein that binds F-actin, it is involved in
regulating HGF-induced cell migration. ASEF2 contains a
SH3 domain followed by RhoGEF (also called
Dbl-homologous or DH) and Pleckstrin Homology (PH)
domains. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 27.7 bits (61), Expect = 0.93
Identities = 15/49 (30%), Positives = 25/49 (51%), Gaps = 2/49 (4%)
Query: 196 IIAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
+ A A +D + +L K G + VL E K WW G+ ++R ++F
Sbjct: 1 VYAEALWDHVTMDDQELAFKAGDVIRVL--EASNKDWWWGRNEDREAWF 47
>gnl|CDD|212803 cd11870, SH3_p67phox-like_C, C-terminal Src Homology 3 domain of
the p67phox subunit of NADPH oxidase and similar
proteins. This subfamily is composed of p67phox, NADPH
oxidase activator 1 (Noxa1), and similar proteins.
p67phox, also called Neutrophil cytosol factor 2
(NCF-2), and Noxa1 are homologs and are the cytosolic
subunits of the phagocytic (Nox2) and nonphagocytic
(Nox1) NADPH oxidase complexes, respectively. NADPH
oxidase catalyzes the transfer of electrons from NADPH
to oxygen during phagocytosis forming superoxide and
reactive oxygen species. p67phox and Noxa1 play
regulatory roles. p67phox contains N-terminal TPR, first
SH3 (or N-terminal or central SH3), PB1, and C-terminal
SH3 domains. Noxa1 has a similar domain architecture
except it is lacking the N-terminal SH3 domain. The TPR
domain of both binds activated GTP-bound Rac, while the
C-terminal SH3 domain of p67phox and Noxa1 binds the
polyproline motif found at the C-terminus of p47phox and
Noxo1, respectively. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 27.9 bits (62), Expect = 1.0
Identities = 14/50 (28%), Positives = 22/50 (44%), Gaps = 2/50 (4%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYFFQLY 248
VA + L ++G + VLS+ E W +G D RV F + +
Sbjct: 3 VALHRYEAQGPEDLGFREGDTIDVLSEVNEA--WLEGHSDGRVGIFPKCF 50
>gnl|CDD|212988 cd12055, SH3_CIN85_2, Second Src Homology 3 domain (SH3B) of
Cbl-interacting protein of 85 kDa. CIN85, also called
SH3 domain-containing kinase-binding protein 1 (SH3KBP1)
or CD2-binding protein 3 (CD2BP3) or Ruk, is an adaptor
protein that is involved in the downregulation of
receptor tyrosine kinases by facilitating endocytosis
through interaction with endophilin-associated ubiquitin
ligase Cbl proteins. It is also important in many other
cellular processes including vesicle-mediated transport,
cytoskeletal remodelling, apoptosis, cell adhesion and
migration, and viral infection, among others. CIN85
exists as multiple variants from alternative splicing;
the main variant contains three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CIN85 to bind
various protein partners and assemble complexes that
have been implicated in many different functions. This
alignment model represents the second SH3 domain (SH3B)
of CIN85. SH3B has been shown to bind Cbl proline-rich
peptides and ubiquitin. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 27.7 bits (61), Expect = 1.1
Identities = 14/45 (31%), Positives = 24/45 (53%), Gaps = 2/45 (4%)
Query: 200 AEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
F + P ++L LK G +I + E E+ GWW+G ++ + F
Sbjct: 4 VAFSYLPQNEDELELKVG-DIIEVVGEVEE-GWWEGVLNGKTGMF 46
>gnl|CDD|212798 cd11864, SH3_PEX13_eumet, Src Homology 3 domain of eumetazoan
Peroxisomal biogenesis factor 13. PEX13 is a peroxin
and is required for protein import into the peroxisomal
matrix and membrane. It is an integral membrane protein
that is essential for the localization of PEX14 and the
import of proteins containing the peroxisome matrix
targeting signals, PTS1 and PTS2. Mutations of the PEX13
gene in humans lead to a wide range of peroxisome
biogenesis disorders (PBDs), the most severe of which is
known as Zellweger syndrome (ZS), a severe multisystem
disorder characterized by hypotonia, psychomotor
retardation, and neuronal migration defects. PEX13
contains two transmembrane regions and a C-terminal SH3
domain. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 27.6 bits (62), Expect = 1.1
Identities = 12/49 (24%), Positives = 23/49 (46%), Gaps = 4/49 (8%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQ---KGWWKGKIDERVS 242
+A AE+DF ++L + G + L+ + Q +GW +D +
Sbjct: 1 VARAEYDFVAESEDELSFRAG-DKLRLAPKELQPRVRGWLLATVDGQKI 48
>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 = 28.3 bits (63), Expect = 1.2
Identities = 16/53 (30%), Positives = 24/53 (45%), Gaps = 6/53 (11%)
Query: 89 LWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKH 141
WF G + R +A LLE + G YL+R T + LS ++ +H
Sbjct: 1 AWFHGFITRREAERLLEPKPQGCYLVRFSESAVT------FVLSYRSRTCCRH 47
>gnl|CDD|212852 cd11919, SH3_Sorbs1_1, First Src Homology 3 domain of Sorbin and
SH3 domain containing 1 (Sorbs1), also called ponsin.
Sorbs1 is also called ponsin, SH3P12, or CAP (c-Cbl
associated protein). It is an adaptor protein containing
one sorbin homology (SoHo) and three SH3 domains. It
binds Cbl and plays a major role in regulating the
insulin signaling pathway by enhancing insulin-induced
phosphorylation of Cbl. Sorbs1, like vinexin, localizes
at cell-ECM and cell-cell adhesion sites where it binds
vinculin, paxillin, and afadin. It may function in the
control of cell motility. Other interaction partners of
Sorbs1 include c-Abl, Sos, flotillin, Grb4, ataxin-7,
filamin C, among others. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 27.6 bits (61), Expect = 1.3
Identities = 17/51 (33%), Positives = 30/51 (58%), Gaps = 2/51 (3%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYFFQLY 248
A A+FDF +LPL++G ++ + K+ +Q W++G+ RV F + Y
Sbjct: 3 ARAKFDFKAQTLKELPLQKG-DIVYIYKQIDQN-WYEGEHHGRVGIFPRSY 51
>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 = 28.8 bits (65), Expect = 1.6
Identities = 28/105 (26%), Positives = 40/105 (38%), Gaps = 25/105 (23%)
Query: 83 ENLSEYLWFVGEMGREKATSLLEREAD----------GTYLLRIRPQG-PTHPNETIYAL 131
E+L + W+ G + R+ A SL++RE D G Y+L R +G P H L
Sbjct: 1 EDLRSHAWYHGRIPRQVAESLVQREGDFLVRDSLSSPGDYVLTCRWKGQPLHFKINRVVL 60
Query: 132 SLKTDEKVKHMKVYEKEMDGVPQYFLSQSRYFRSIVELICCYERN 176
Y + QY + F SI L+ Y N
Sbjct: 61 RPSE--------AYTRV-----QYQFEDEQ-FDSIPALVHFYVGN 91
>gnl|CDD|212895 cd11962, SH3_Abp1_fungi_C1, First C-terminal Src homology 3 domain
of Fungal Actin-binding protein 1. Abp1 is an adaptor
protein that functions in receptor-mediated endocytosis
and vesicle trafficking. It contains an N-terminal
actin-binding module, the actin-depolymerizing factor
(ADF) homology domain, a central proline-rich region,
and a C-terminal SH3 domain (many yeast Abp1 proteins
contain two C-terminal SH3 domains). Yeast Abp1 also
contains two acidic domains that bind directly to the
Arp2/3 complex, which is required to initiate actin
polymerization. The SH3 domain of yeast Abp1 binds and
localizes the kinases, Ark1p and Prk1p, which facilitate
actin patch disassembly following vesicle
internalization. It also mediates the localization to
the actin patch of the synaptojanin-like protein, Sjl2p,
which plays a key role in endocytosis. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 54
Score = 27.1 bits (60), Expect = 1.7
Identities = 12/38 (31%), Positives = 18/38 (47%), Gaps = 2/38 (5%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKG 235
AV +D+ E N++ L +G V + E WW G
Sbjct: 2 AVVLYDYEKDEDNEIELVEGEIVTNIEMVDE--DWWMG 37
>gnl|CDD|213743 TIGR02829, spore_III_AE, stage III sporulation protein AE. A
comparative genome analysis of all sequenced genomes of
shows a number of proteins conserved strictly among the
endospore-forming subset of the Firmicutes. This
protein, a member of this panel, is found in a spore
formation operon and is designated stage III sporulation
protein AE [Cellular processes, Sporulation and
germination].
Length = 381
Score = 29.6 bits (67), Expect = 1.8
Identities = 11/41 (26%), Positives = 17/41 (41%), Gaps = 8/41 (19%)
Query: 225 KEGEQ----KGWWKGKIDERVSYFFQLYWGNFRLLSSLFIV 261
GE+ K + +SY F N +LL +L I+
Sbjct: 70 LRGEKPFSVKKIGEA----LLSYLFHELLSNGKLLGTLIIL 106
>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 = 28.3 bits (63), Expect = 1.9
Identities = 19/88 (21%), Positives = 37/88 (42%), Gaps = 11/88 (12%)
Query: 84 NLSEYLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDE-KVKHM 142
L E WF G++ ++ + L + +GT+L+R P Y +S + + H
Sbjct: 6 ELMECAWFHGDISTSESENRLNGKPEGTFLVRFSTSEPGA-----YTISKVSKNGGISHQ 60
Query: 143 KVYEKEMDGVPQYFLSQSRYFRSIVELI 170
+++ F + + S+ ELI
Sbjct: 61 RIHRPGGK-----FQVNNSKYLSVKELI 83
>gnl|CDD|212817 cd11884, SH3_MYO15, Src Homology 3 domain of Myosin XV. This
subfamily is composed of proteins with similarity to
Myosin XVa. Myosin XVa is an unconventional myosin that
is critical for the normal growth of mechanosensory
stereocilia of inner ear hair cells. Mutations in the
myosin XVa gene are associated with nonsyndromic hearing
loss. Myosin XVa contains a unique N-terminal extension
followed by a motor domain, light chain-binding IQ
motifs, and a tail consisting of a pair of MyTH4-FERM
tandems separated by a SH3 domain, and a PDZ domain. SH3
domains bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs;
they play a role in the regulation of enzymes by
intramolecular interactions, changing the subcellular
localization of signal pathway components and mediate
multiprotein complex assemblies.
Length = 56
Score = 26.9 bits (60), Expect = 1.9
Identities = 15/52 (28%), Positives = 22/52 (42%), Gaps = 1/52 (1%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGE-QKGWWKGKIDERVSYFFQLY 248
VA + + L +G + +L KEG GW G +D R F + Y
Sbjct: 2 VVAVRAYITRDQTLLSFHKGDVIKLLPKEGPLDPGWLFGTLDGRSGAFPKEY 53
>gnl|CDD|212805 cd11872, SH3_DOCK_AB, Src Homology 3 domain of Class A and B
Dedicator of Cytokinesis proteins. DOCK proteins are
atypical guanine nucleotide exchange factors (GEFs) that
lack the conventional Dbl homology (DH) domain. They are
divided into four classes (A-D) based on sequence
similarity and domain architecture: class A includes
Dock1, 2 and 5; class B includes Dock3 and 4; class C
includes Dock6, 7, and 8; and class D includes Dock9, 10
and 11. All DOCKs contain two homology domains: the
DHR-1 (Dock homology region-1), also called CZH1 (CED-5,
Dock180, and MBC-zizimin homology 1), and DHR-2 (also
called CZH2 or Docker). The DHR-1 domain binds
phosphatidylinositol-3,4,5-triphosphate while DHR-2
contains the catalytic activity for Rac and/or Cdc42.
This subfamily includes only Class A and B DOCKs, which
also contain an SH3 domain at the N-terminal region and
a PxxP motif at the C-terminus. Class A/B DOCKs are
mostly specific GEFs for Rac, except Dock4 which
activates the Ras family GTPase Rap1, probably
indirectly through interaction with Rap regulatory
proteins. The SH3 domain of class A/B DOCKs have been
shown to bind Elmo, a scaffold protein that promotes GEF
activity of DOCKs by releasing DHR-2 autoinhibition by
the intramolecular SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 26.8 bits (60), Expect = 2.0
Identities = 12/39 (30%), Positives = 20/39 (51%), Gaps = 3/39 (7%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKG 235
VA ++F +QL L+ G V +L + GW++G
Sbjct: 1 YGVAIYNFQGDGEHQLSLQVGDTVQILEECE---GWYRG 36
>gnl|CDD|212840 cd11907, SH3_TXK, Src Homology 3 domain of TXK, also called Resting
lymphocyte kinase (Rlk). TXK is a cytoplasmic (or
nonreceptor) tyr kinase containing Src homology protein
interaction domains (SH3, SH2) N-terminal to the
catalytic tyr kinase domain. It also contains an
N-terminal cysteine-rich region. Rlk is expressed in
T-cells and mast cell lines, and is a key component of
T-cell receptor (TCR) signaling. It is important in
TCR-stimulated proliferation, IL-2 production and
phospholipase C-gamma1 activation. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 26.8 bits (59), Expect = 2.0
Identities = 13/41 (31%), Positives = 21/41 (51%), Gaps = 2/41 (4%)
Query: 196 IIAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGK 236
I A +DF P E + L LK+ + ++L + WWK +
Sbjct: 1 IQVKALYDFLPREPSNLALKRAEEYLILEQYDPH--WWKAR 39
>gnl|CDD|198208 cd10345, SH2_C-SH2_Zap70_Syk_like, C-terminal Src homology 2 (SH2)
domain found in Zeta-chain-associated protein kinase 70
(ZAP-70) and Spleen tyrosine kinase (Syk) proteins.
ZAP-70 and Syk comprise a family of hematopoietic cell
specific protein tyrosine kinases (PTKs) that are
required for antigen and antibody receptor function.
ZAP-70 is expressed in T and natural killer (NK) cells
and Syk is expressed in B cells, mast cells,
polymorphonuclear leukocytes, platelets, macrophages,
and immature T cells. They are required for the proper
development of T and B cells, immune receptors, and
activating NK cells. They consist of two N-terminal Src
homology 2 (SH2) domains and a C-terminal kinase domain
separated from the SH2 domains by a linker or hinge
region. Phosphorylation of both tyrosine residues within
the Immunoreceptor Tyrosine-based Activation Motifs
(ITAM; consensus sequence Yxx[LI]x(7,8)Yxx[LI]) by the
Src-family PTKs is required for efficient interaction of
ZAP-70 and Syk with the receptor subunits and for
receptor function. ZAP-70 forms two phosphotyrosine
binding pockets, one of which is shared by both SH2
domains. In Syk the two SH2 domains do not form such a
phosphotyrosine-binding site. The SH2 domains here are
believed to function independently. In addition, the two
SH2 domains of Syk display flexibility in their relative
orientation, allowing Syk to accommodate a greater
variety of spacing sequences between the ITAM
phosphotyrosines and singly phosphorylated non-classical
ITAM ligands. This model contains the C-terminus SH2
domains of both Syk and Zap70. In general SH2 domains
are involved in signal transduction. They typically
bind pTyr-containing ligands via two surface pockets, a
pTyr and hydrophobic binding pocket, allowing proteins
with SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 95
Score = 27.7 bits (61), Expect = 2.1
Identities = 20/83 (24%), Positives = 41/83 (49%), Gaps = 11/83 (13%)
Query: 90 WFVGEMGREKATSLLEREA--DGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEK 147
WF G++ RE++ ++ + +G +L+R R + YAL L + KV H Y
Sbjct: 2 WFHGKISREESEQIVLIGSKTNGKFLIRARDNNGS------YALCLLHEGKVLH---YRI 52
Query: 148 EMDGVPQYFLSQSRYFRSIVELI 170
+ D + + + + F ++ +L+
Sbjct: 53 DKDKTGKLSIPEGKKFDTLWQLV 75
>gnl|CDD|212828 cd11895, SH3_FCHSD1_2, Second Src Homology 3 domain of FCH and
double SH3 domains protein 1. FCHSD1 has a domain
structure consisting of an N-terminal F-BAR (FES-CIP4
Homology and Bin/Amphiphysin/Rvs), two SH3, and
C-terminal proline-rich domains. It has only been
characterized in silico and its function is unknown. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 26.9 bits (59), Expect = 2.2
Identities = 13/53 (24%), Positives = 26/53 (49%), Gaps = 2/53 (3%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVL--SKEGEQKGWWKGKIDERVSYFFQL 247
+A A + + +L +G + +L +++G G+W+G+ RV F L
Sbjct: 1 LARALYSYTGQSPEELSFPEGALIRLLPRAQDGVDDGFWRGEFGGRVGVFPSL 53
>gnl|CDD|212883 cd11950, SH3_GRAP2_C, C-terminal Src homology 3 domain of
GRB2-related adaptor protein 2. GRAP2 is also called
GADS (GRB2-related adapter downstream of Shc), GrpL,
GRB2L, Mona, or GRID (Grb2-related protein with insert
domain). It is expressed specifically in the
hematopoietic system. It plays an important role in T
cell receptor (TCR) signaling by promoting the formation
of the SLP-76:LAT complex, which couples the TCR to the
Ras pathway. It also has roles in antigen-receptor and
tyrosine kinase mediated signaling. GRAP2 is unique from
other GRB2-like adaptor proteins in that it can be
regulated by caspase cleavage. It contains an N-terminal
SH3 domain, a central SH2 domain, and a C-terminal SH3
domain. The C-terminal SH3 domain of GRAP2 binds to
different motifs found in substrate peptides including
the typical PxxP motif in hematopoietic progenitor
kinase 1 (HPK1), the RxxK motif in SLP-76 and HPK1, and
the RxxxxK motif in phosphatase-like protein HD-PTP. SH3
domains are protein interaction domains that typically
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 26.7 bits (59), Expect = 2.2
Identities = 13/47 (27%), Positives = 22/47 (46%), Gaps = 2/47 (4%)
Query: 198 AVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
A +DF E ++L G + VL + WWKG++ ++ F
Sbjct: 2 VRALYDFEALEDDELGFNSGDVIEVL--DSSNPSWWKGRLHGKLGLF 46
>gnl|CDD|198245 cd10382, SH2_SOCS1, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 98
Score = 27.7 bits (62), Expect = 2.3
Identities = 17/50 (34%), Positives = 26/50 (52%), Gaps = 7/50 (14%)
Query: 86 SEYLWFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKT 135
S + W G + E+A + L+RE GT+L+R Q +ALS+K
Sbjct: 10 SGFYW--GPLSVEEAHAKLKREPVGTFLIRDSRQK-----NCFFALSVKM 52
>gnl|CDD|199832 cd10417, SH2_SH2D7, Src homology 2 domain found in the SH2 domain
containing protein 7 (SH2D7). SH2D7 contains a single
SH2 domain. In general SH2 domains are involved in
signal transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 102
Score = 27.6 bits (61), Expect = 2.9
Identities = 15/59 (25%), Positives = 30/59 (50%), Gaps = 6/59 (10%)
Query: 90 WFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKE 148
WF G + R++ LL +A G++L+R+ + T Y LS + ++ +H + +
Sbjct: 9 WFHGFITRKQTEQLLRDKALGSFLIRLSDR------ATGYILSYRGSDRCRHFVINQLR 61
>gnl|CDD|212908 cd11975, SH3_ARHGEF9, Src homology 3 domain of the Rho guanine
nucleotide exchange factor ARHGEF9. ARHGEF9, also
called PEM2 or collybistin, selectively activates Cdc42
by exchanging bound GDP for free GTP. It is highly
expressed in the brain and it interacts with gephyrin, a
postsynaptic protein associated with GABA and glycine
receptors. Mutations in the ARHGEF9 gene cause X-linked
mental retardation with associated features like
seizures, hyper-anxiety, aggressive behavior, and
sensory hyperarousal. ARHGEF9 contains a SH3 domain
followed by RhoGEF (also called Dbl-homologous or DH)
and Pleckstrin Homology (PH) domains. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 62
Score = 26.6 bits (58), Expect = 3.2
Identities = 18/59 (30%), Positives = 26/59 (44%), Gaps = 5/59 (8%)
Query: 196 IIAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF---FQLYWGN 251
+ A A +D +L K G + VL + K WW G+ID+ +F F W N
Sbjct: 5 VSAEAVWDHVTMANRELAFKAGDVIKVL--DASNKDWWWGQIDDEEGWFPASFVRLWVN 61
>gnl|CDD|212790 cd11856, SH3_p47phox_like, Src homology 3 domains of the p47phox
subunit of NADPH oxidase and similar domains. This
family is composed of the tandem SH3 domains of p47phox
subunit of NADPH oxidase and Nox Organizing protein 1
(NoxO1), the four SH3 domains of Tks4 (Tyr kinase
substrate with four SH3 domains), the five SH3 domains
of Tks5, the SH3 domain of obscurin, Myosin-I, and
similar domains. Most members of this group also contain
Phox homology (PX) domains, except for obscurin and
Myosin-I. p47phox and NoxO1 are regulators of the
phagocytic NADPH oxidase complex (also called Nox2 or
gp91phox) and nonphagocytic NADPH oxidase Nox1,
respectively. They play roles in the activation of their
respective NADPH oxidase, which catalyzes the transfer
of electrons from NADPH to molecular oxygen to form
superoxide. Tks proteins are Src substrates and
scaffolding proteins that play important roles in the
formation of podosomes and invadopodia, the dynamic
actin-rich structures that are related to cell migration
and cancer cell invasion. Obscurin is a giant muscle
protein that plays important roles in the organization
and assembly of the myofibril and the sarcoplasmic
reticulum. Type I myosins (Myosin-I) are actin-dependent
motors in endocytic actin structures and actin patches.
They play roles in membrane traffic in endocytic and
secretory pathways, cell motility, and mechanosensing.
Myosin-I contains an N-terminal actin-activated ATPase,
a phospholipid-binding TH1 (tail homology 1) domain, and
a C-terminal extension which includes an F-actin-binding
TH2 domain, an SH3 domain, and an acidic peptide that
participates in activating the Arp2/3complex. The SH3
domain of myosin-I is required for myosin-I-induced
actin polymerization. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 26.1 bits (58), Expect = 3.3
Identities = 12/48 (25%), Positives = 24/48 (50%), Gaps = 4/48 (8%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSYF 244
+A+A D+ +++ L++G V VL K GWW + ++ +
Sbjct: 3 VAIA--DYEAQGDDEISLQEGEVVEVLEKNDS--GWWYVRKGDKEGWV 46
>gnl|CDD|212734 cd11800, SH3_DNMBP_C2_like, Second C-terminal Src homology 3 domain
of Dynamin Binding Protein, also called Tuba, and
similar domains. DNMBP or Tuba is a cdc42-specific
guanine nucleotide exchange factor (GEF) that contains
four N-terminal SH3 domains, a central RhoGEF [or Dbl
homology (DH)] domain followed by a Bin/Amphiphysin/Rvs
(BAR) domain, and two C-terminal SH3 domains. It
provides a functional link between dynamin, Rho GTPase
signaling, and actin dynamics. It plays an important
role in regulating cell junction configuration. The
C-terminal SH3 domains of DNMBP bind to N-WASP and
Ena/VASP proteins, which are key regulatory proteins of
the actin cytoskeleton. Also included in this subfamily
is the second C-terminal SH3 domain of Rho guanine
nucleotide exchange factor 37 (ARHGEF37), whose function
is still unknown. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 26.2 bits (58), Expect = 3.3
Identities = 12/38 (31%), Positives = 17/38 (44%), Gaps = 4/38 (10%)
Query: 199 VAEFDFCPTEANQLPLKQGCQVIVLSKEGEQKG---WW 233
A + F +L + +G V VL K + KG WW
Sbjct: 3 YALYTFEARSPGELSVTEGQVVTVLEKH-DLKGNPEWW 39
>gnl|CDD|215463 PLN02858, PLN02858, fructose-bisphosphate aldolase.
Length = 1378
Score = 29.0 bits (65), Expect = 3.7
Identities = 17/54 (31%), Positives = 19/54 (35%), Gaps = 17/54 (31%)
Query: 2 GLKSQNLR-----------------SISIVTLKSRGLRPLCSQACYLACHKQCI 38
G KS NLR SISI L+ G +C C L CI
Sbjct: 806 GYKSSNLREWVEEKTKGRISANSVQSISIQLLRKGGPDAVCEHLCSLKKGSTCI 859
>gnl|CDD|212950 cd12017, SH3_Tks_3, Third Src homology 3 domain of Tyrosine kinase
substrate (Tks) proteins. Tks proteins are Src
substrates and scaffolding proteins that play important
roles in the formation of podosomes and invadopodia, the
dynamic actin-rich structures that are related to cell
migration and cancer cell invasion. Vertebrates contain
two Tks proteins, Tks4 (Tyr kinase substrate with four
SH3 domains) and Tks5 (Tyr kinase substrate with five
SH3 domains), which display partially overlapping but
non-redundant functions. Both associate with the ADAMs
family of transmembrane metalloproteases, which function
as sheddases and mediators of cell and matrix
interactions. Tks5 interacts with N-WASP and Nck, while
Tks4 is essential for the localization of MT1-MMP
(membrane-type 1 matrix metalloproteinase) to
invadopodia. Tks proteins contain an N-terminal Phox
homology (PX) domain and four or five SH3 domains. This
model characterizes the third SH3 domain of Tks
proteins. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 25.9 bits (57), Expect = 4.1
Identities = 12/38 (31%), Positives = 20/38 (52%), Gaps = 2/38 (5%)
Query: 203 DFCPTEANQLPLKQGCQVIVLSKEGEQKGWWKGKIDER 240
+F T + + ++G +V V+ K GWW KID +
Sbjct: 7 EFQATIQDGISFQKGQKVEVIDKN--PSGWWYVKIDGK 42
>gnl|CDD|212823 cd11890, MIA, Melanoma Inhibitory Activity protein. MIA is a
single domain protein that adopts a Src Homology 3 (SH3)
domain-like fold; it contains an additional antiparallel
beta sheet and two disulfide bonds compared to classical
SH3 domains. MIA is secreted from malignant melanoma
cells and it plays an important role in melanoma
development and invasion. MIA is expressed by
chondrocytes in normal tissues and may be important in
the cartilage cell phenotype. Unlike classical SH3
domains, MIA does not bind proline-rich ligands. It
binds peptide ligands with sequence similarity to type
III human fibronectin repeats.
Length = 98
Score = 27.2 bits (60), Expect = 4.4
Identities = 17/57 (29%), Positives = 27/57 (47%), Gaps = 9/57 (15%)
Query: 197 IAVAEFDFCPTEANQLPLKQGCQVIVLSK---------EGEQKGWWKGKIDERVSYF 244
IAVA D+ + +P+++G V V SK G +G + G+ R+ YF
Sbjct: 15 IAVALQDYMAPDCRFIPIQRGQVVYVFSKLKGRGRLFWGGSVQGDYYGEQAARLGYF 71
>gnl|CDD|238729 cd01452, VWA_26S_proteasome_subunit, 26S proteasome plays a major
role in eukaryotic protein breakdown, especially for
ubiquitin-tagged proteins. It is an ATP-dependent
protease responsible for the bulk of non-lysosomal
proteolysis in eukaryotes, often using covalent
modification of proteins by ubiquitylation. It consists
of a 20S proteolytic core particle (CP) and a 19S
regulatory particle (RP). The CP is an ATP independent
peptidase consisting of hydrolyzing activities. One or
both ends of CP carry the RP that confers both ubiquitin
and ATP dependence to the 26S proteosome. The RP's
proposed functions include recognition of substrates and
translocation of these to CP for proteolysis. The RP can
dissociate into a stable lid and base subcomplexes. The
base is composed of three non-ATPase subunits (Rpn 1, 2
and 10). A single residue in the vWA domain of Rpn10 has
been implicated to be responsible for stabilizing the
lid-base association.
Length = 187
Score = 27.3 bits (61), Expect = 6.4
Identities = 14/41 (34%), Positives = 18/41 (43%), Gaps = 4/41 (9%)
Query: 145 YEKEMDGVPQYFLSQSRYFRSIVELICCYERNSLIENFIGL 185
Y + D P F +Q V LIC + S EN +GL
Sbjct: 15 YMRNGDYPPTRFQAQ----ADAVNLICQAKTRSNPENNVGL 51
>gnl|CDD|211667 TIGR01530, nadN, NAD pyrophosphatase/5'-nucleotidase NadN. This
model describes NadN of Haemophilus influenzae and a
small number of close homologs in pathogenic,
Gram-negative bacteria. NadN is a periplasmic enzyme
that cleaves NAD (nicotinamide adenine dinucleotide) to
NMN (nicotinamide mononucleotide) and AMP. The NMN must
be converted by a 5'-nucleotidase to nicotinamide
riboside for import. NadN belongs a large family of
5'-nucleotidases and has NMN 5'-nucleotidase activity
for NMN, AMP, etc [Transport and binding proteins,
Other, Biosynthesis of cofactors, prosthetic groups, and
carriers, Pyridine nucleotides].
Length = 545
Score = 28.0 bits (62), Expect = 6.6
Identities = 10/36 (27%), Positives = 19/36 (52%), Gaps = 1/36 (2%)
Query: 208 EANQLPLKQGCQVIVLSKEGEQKGWWKGKIDERVSY 243
EAN+ P +G +++ + +Q W+ ID+ Y
Sbjct: 463 EANETPNAEGKRLVSVEVLNKQTQQWE-PIDDNKRY 497
>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 = 26.4 bits (58), Expect = 8.1
Identities = 20/88 (22%), Positives = 42/88 (47%), Gaps = 10/88 (11%)
Query: 90 WFVGEMGREKATSLLEREADGTYLLRIRPQGPTHPNETIYALSLKTDEKVKHMKVYEKE- 148
W+ G M +A L+ +GT+L+R ++ + +S+KT ++++ ++
Sbjct: 9 WYWGSMTVNEAKEKLQDAPEGTFLVRDSSH-----SDYLLTISVKTSAGPTNLRIEYQDG 63
Query: 149 ---MDGVPQYFLSQSRYFRSIVELICCY 173
+D + S+ + F S+V LI Y
Sbjct: 64 KFRLDSI-ICVKSKLKQFDSVVHLIEYY 90
>gnl|CDD|198279 cd10416, SH2_SH2D2A, Src homology 2 domain found in the SH2 domain
containing protein 2A (SH2D2A). SH2D2A contains a
single SH2 domain. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 102
Score = 26.2 bits (57), Expect = 8.4
Identities = 12/27 (44%), Positives = 16/27 (59%)
Query: 89 LWFVGEMGREKATSLLEREADGTYLLR 115
WF G + R +A LLE + G YL+R
Sbjct: 8 AWFHGFITRREAERLLEPKPQGCYLVR 34
>gnl|CDD|237917 PRK15134, PRK15134, microcin C ABC transporter ATP-binding protein
YejF; Provisional.
Length = 529
Score = 27.4 bits (61), Expect = 8.6
Identities = 27/86 (31%), Positives = 36/86 (41%), Gaps = 18/86 (20%)
Query: 46 TGVPLPAMSPRPPLMDIAGAAQPLGGNEWTAKSWADH----ENLS------EYLWFVGEM 95
+G P+P P PL+D+ + K DH +N+S E L VGE
Sbjct: 262 SGDPVPLPEPASPLLDVEQLQVAFPIRKGILKRTVDHNVVVKNISFTLRPGETLGLVGES 321
Query: 96 GREKATSLLEREADGTYLLR-IRPQG 120
G K+T+ G LLR I QG
Sbjct: 322 GSGKSTT-------GLALLRLINSQG 340
>gnl|CDD|239546 cd03463, 3,4-PCD_alpha, Protocatechuate 3,4-dioxygenase (3,4-PCD) ,
alpha subunit. 3,4-PCD catalyzes the oxidative ring
cleavage of 3,4-dihydroxybenzoate to produce
beta-carboxy-cis,cis-muconate. 3,4-PCDs are large
aggregates of 12 protomers, each composed of an alpha-
and beta-subunit and an Fe3+ ion bound in the
beta-subunit at the alpha-subunit-beta-subunit
interface. 3,4-PCD is a member of the aromatic
dioxygenases which are non-heme iron intradiol-cleaving
enzymes that break the C1-C2 bond and utilize Fe3+.
Length = 185
Score = 26.8 bits (60), Expect = 8.8
Identities = 13/30 (43%), Positives = 17/30 (56%), Gaps = 3/30 (10%)
Query: 100 ATSLLEREADGTYLLRIRPQGPTHPNETIY 129
AT + +RE DG Y IR QG ET++
Sbjct: 157 ATLIAKREGDGAYRFDIRLQG---EGETVF 183
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
0.322 0.138 0.440
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: 13,801,599
Number of extensions: 1295729
Number of successful extensions: 1197
Number of sequences better than 10.0: 1
Number of HSP's gapped: 1145
Number of HSP's successfully gapped: 168
Length of query: 272
Length of database: 10,937,602
Length adjustment: 95
Effective length of query: 177
Effective length of database: 6,723,972
Effective search space: 1190143044
Effective search space used: 1190143044
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.4 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.9 bits)
S2: 58 (26.0 bits)