RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy4489
(72 letters)
>gnl|CDD|212724 cd11790, SH3_Amphiphysin, Src Homology 3 domain of Amphiphysin
and related domains. Amphiphysins function primarily
in endocytosis and other membrane remodeling events.
They exist in several isoforms and mammals possess two
amphiphysin proteins from distinct genes. Amphiphysin I
proteins, enriched in the brain and nervous system,
contain domains that bind clathrin, Adaptor Protein
complex 2 (AP2), dynamin, and synaptojanin. They
function in synaptic vesicle endocytosis. Human
autoantibodies to amphiphysin I hinder GABAergic
signaling and contribute to the pathogenesis of
paraneoplastic stiff-person syndrome. Some amphiphysin
II isoforms, also called Bridging integrator 1 (Bin1),
are localized in many different tissues and may
function in intracellular vesicle trafficking. In
skeletal muscle, Bin1 plays a role in the organization
and maintenance of the T-tubule network. Mutations in
Bin1 are associated with autosomal recessive
centronuclear myopathy. Amphiphysins contain an
N-terminal BAR domain with an additional N-terminal
amphipathic helix (an N-BAR), a variable central
domain, and a C-terminal SH3 domain. The SH3 domain of
amphiphysins bind proline-rich motifs present in
binding partners such as dynamin, synaptojanin, and
nsP3. It also belongs to a subset of SH3 domains that
bind ubiquitin in a site that overlaps with the peptide
binding site. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 64
Score = 53.1 bits (128), Expect = 2e-11
Identities = 18/31 (58%), Positives = 25/31 (80%)
Query: 18 TYKYTREDVDELSFDVGEIIRVVEYDDPEEQ 48
T+ YT ED DEL+F+ G++I V+ +DDPEEQ
Sbjct: 8 THDYTAEDTDELTFEKGDVILVIPFDDPEEQ 38
>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 = 33.7 bits (78), Expect = 7e-04
Identities = 15/28 (53%), Positives = 18/28 (64%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
Y YT +D DELSF G+II V+E D
Sbjct: 9 YDYTAQDPDELSFKKGDIITVLEKSDDG 36
>gnl|CDD|212774 cd11840, SH3_Intersectin_5, Fifth Src homology 3 domain (or SH3E)
of Intersectin. Intersectins (ITSNs) are adaptor
proteins that function in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction.
They are essential for initiating clathrin-coated pit
formation. They bind to many proteins through their
multidomain structure and facilitate the assembly of
multimeric complexes. Vertebrates contain two ITSN
proteins, ITSN1 and ITSN2, which exist in alternatively
spliced short and long isoforms. The short isoforms
contain two Eps15 homology domains (EH1 and EH2), a
coiled-coil region and five SH3 domains (SH3A-E), while
the long isoforms, in addition, contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin homology (PH)
and C2 domains. ITSN1 and ITSN2 are both widely
expressed, with variations depending on tissue type and
stage of development. The fifth SH3 domain (or SH3E) of
ITSN1 has been shown to bind many protein partners
including SGIP1, Sos1, dynamin1/2, CIN85, c-Cbl, SHIP2,
N-WASP, and synaptojanin-1, among others. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 32.8 bits (75), Expect = 0.001
Identities = 14/28 (50%), Positives = 20/28 (71%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
+ YT ++ DELSF G+II V+ DDP+
Sbjct: 6 FPYTAQNEDELSFQKGDIINVLSKDDPD 33
>gnl|CDD|212761 cd11827, SH3_MyoIe_If_like, Src homology 3 domain of Myosins Ie,
If, and similar proteins. Myosins Ie (MyoIe) and If
(MyoIf) are nonmuscle, unconventional, long tailed,
class I myosins containing an N-terminal motor domain
and a myosin tail with TH1, TH2, and SH3 domains. MyoIe
interacts with the endocytic proteins, dynamin and
synaptojanin-1, through its SH3 domain; it may play a
role in clathrin-dependent endocytosis. In the kidney,
MyoIe is critical for podocyte function and normal
glomerular filtration. Mutations in MyoIe is associated
with focal segmental glomerulosclerosis, a disease
characterized by massive proteinuria and progression to
end-stage kidney disease. MyoIf is predominantly
expressed in the immune system; it plays a role in
immune cell motility and innate immunity. Mutations in
MyoIf may be associated with the loss of hearing. The
MyoIf gene has also been found to be fused to the MLL
(Mixed lineage leukemia) gene in infant acute myeloid
leukemias (AML). SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 32.0 bits (73), Expect = 0.003
Identities = 12/25 (48%), Positives = 18/25 (72%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYD 43
Y Y +D DELSF+ G+II +++ D
Sbjct: 6 YAYDAQDTDELSFNEGDIIEILKED 30
>gnl|CDD|212769 cd11835, SH3_ARHGAP32_33, Src homology 3 domain of Rho
GTPase-activating proteins 32 and 33, and similar
proteins. Members of this family contain N-terminal PX
and Src Homology 3 (SH3) domains, a central Rho GAP
domain, and C-terminal extensions. RhoGAPs (or ARHGAPs)
bind to Rho proteins and enhance the hydrolysis rates
of bound GTP. ARHGAP32 is also called RICS, PX-RICS,
p250GAP, or p200RhoGAP. It is a Rho GTPase-activating
protein for Cdc42 and Rac1, and is implicated in the
regulation of postsynaptic signaling and neurite
outgrowth. PX-RICS, a variant of RICS that contain PX
and SH3 domains, is the main isoform expressed during
neural development. It is involved in neural functions
including axon and dendrite extension, postnatal
remodeling, and fine-tuning of neural circuits during
early brain development. ARHGAP33, also called sorting
nexin 26 or TCGAP (Tc10/CDC42 GTPase-activating
protein), is widely expressed in the brain where it is
involved in regulating the outgrowth of axons and
dendrites and is regulated by the protein tyrosine
kinase Fyn. It is translocated to the plasma membrane
in adipocytes in response to insulin and may be
involved in the regulation of insulin-stimulated
glucose transport. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 32.0 bits (73), Expect = 0.003
Identities = 13/32 (40%), Positives = 21/32 (65%)
Query: 16 YFTYKYTREDVDELSFDVGEIIRVVEYDDPEE 47
+ +YT + DELS +VG+I+ V++ PEE
Sbjct: 3 HVIKRYTAQAPDELSLEVGDIVSVIDMPPPEE 34
>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 = 31.7 bits (73), Expect = 0.003
Identities = 15/28 (53%), Positives = 18/28 (64%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
Y Y +D DELSF G+II V+E DD
Sbjct: 6 YDYEAQDDDELSFKKGDIITVLEKDDDG 33
>gnl|CDD|213015 cd12139, SH3_Bin1, Src Homology 3 domain of Bridging integrator 1
(Bin1), also called Amphiphysin-2. Bin1 isoforms are
localized in many different tissues and may function in
intracellular vesicle trafficking. It plays a role in
the organization and maintenance of the T-tubule
network in skeletal muscle. Mutations in Bin1 are
associated with autosomal recessive centronuclear
myopathy. Bin1 contains an N-terminal BAR domain with
an additional N-terminal amphipathic helix (an N-BAR)
and a C-terminal SH3 domain. The SH3 domain of Bin1
forms transient complexes with actin, myosin filaments,
and CDK5, to facilitate sarcomere organization and
myofiber maturation. It also binds dynamin and prevents
its self-assembly. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 72
Score = 31.8 bits (72), Expect = 0.005
Identities = 12/32 (37%), Positives = 20/32 (62%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPEEQVD 50
+ YT D DEL G+++ V+ + +PEEQ +
Sbjct: 9 HDYTATDTDELQLKAGDVVLVIPFQNPEEQDE 40
>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 = 31.0 bits (71), Expect = 0.006
Identities = 14/28 (50%), Positives = 17/28 (60%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
Y YT + DELSF G+II V+E D
Sbjct: 4 YDYTAREPDELSFKKGDIIIVLEKSDDG 31
>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 = 30.7 bits (69), Expect = 0.011
Identities = 13/28 (46%), Positives = 20/28 (71%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
Y YT ++ DEL+F G+II V+ +DP+
Sbjct: 7 YDYTAQNDDELAFSKGQIINVLNKEDPD 34
>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 = 30.2 bits (68), Expect = 0.016
Identities = 12/27 (44%), Positives = 18/27 (66%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDP 45
Y ++ ED +LSF G+II V++ DP
Sbjct: 6 YDFSAEDPSQLSFRRGDIIEVLDCPDP 32
>gnl|CDD|212929 cd11996, SH3_Intersectin2_5, Fifth Src homology 3 domain (or
SH3E) of Intersectin-2. Intersectin-2 (ITSN2) is an
adaptor protein that functions in exo- and endocytosis,
actin cytoskeletal reorganization, and signal
transduction. It plays a role in clathrin-coated pit
(CCP) formation. It binds to many proteins through its
multidomain structure and facilitate the assembly of
multimeric complexes. ITSN2 also functions as a
specific GEF for Cdc42 activation in epithelial
morphogenesis, and is required in mitotic spindle
orientation. It exists in alternatively spliced short
and long isoforms. The short isoform contains two Eps15
homology domains (EH1 and EH2), a coiled-coil region
and five SH3 domains (SH3A-E), while the long isoform,
in addition, contains RhoGEF (also called
Dbl-homologous or DH), Pleckstrin homology (PH) and C2
domains. The fifth SH3 domain (or SH3E) of ITSN2 is
expected to bind protein partners, similar to ITSN1
which has been shown to bind many protein partners
including SGIP1, Sos1, dynamin1/2, CIN85, c-Cbl, SHIP2,
N-WASP, and synaptojanin-1, among others. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 29.9 bits (67), Expect = 0.020
Identities = 14/28 (50%), Positives = 19/28 (67%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
Y YT + DELSF G++I V+ DDP+
Sbjct: 7 YDYTANNEDELSFSKGQLINVLNKDDPD 34
>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 = 29.6 bits (67), Expect = 0.022
Identities = 10/23 (43%), Positives = 14/23 (60%)
Query: 18 TYKYTREDVDELSFDVGEIIRVV 40
+ + + DELSFD G+II V
Sbjct: 5 KFNFEGTNEDELSFDKGDIITVT 27
>gnl|CDD|212771 cd11837, SH3_Intersectin_2, Second Src homology 3 domain (or
SH3B) of Intersectin. Intersectins (ITSNs) are adaptor
proteins that function in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction.
They are essential for initiating clathrin-coated pit
formation. They bind to many proteins through their
multidomain structure and facilitate the assembly of
multimeric complexes. Vertebrates contain two ITSN
proteins, ITSN1 and ITSN2, which exist in alternatively
spliced short and long isoforms. The short isoforms
contain two Eps15 homology domains (EH1 and EH2), a
coiled-coil region and five SH3 domains (SH3A-E), while
the long isoforms, in addition, contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin homology (PH)
and C2 domains. ITSN1 and ITSN2 are both widely
expressed, with variations depending on tissue type and
stage of development. The second SH3 domain (or SH3B)
of ITSN1 has been shown to bind WNK and CdGAP. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 29.3 bits (66), Expect = 0.031
Identities = 9/27 (33%), Positives = 15/27 (55%)
Query: 18 TYKYTREDVDELSFDVGEIIRVVEYDD 44
Y + + + LSF G+II V+E +
Sbjct: 5 LYPWRAKKENHLSFAKGDIITVLEQQE 31
>gnl|CDD|212706 cd11772, SH3_OSTF1, Src Homology 3 domain of metazoan osteoclast
stimulating factor 1. OSTF1, also named OSF or SH3P2,
is a signaling protein containing SH3 and
ankyrin-repeat domains. It acts through a Src-related
pathway to enhance the formation of osteoclasts and
bone resorption. It also acts as a negative regulator
of cell motility. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 28.8 bits (65), Expect = 0.044
Identities = 10/27 (37%), Positives = 17/27 (62%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDP 45
Y Y + DELSF+ G+++ + + DP
Sbjct: 6 YDYEAQHPDELSFEEGDLLYISDKSDP 32
>gnl|CDD|212695 cd11761, SH3_FCHSD_1, First Src Homology 3 domain of FCH and
double SH3 domains proteins. This group is composed of
FCH and double SH3 domains protein 1 (FCHSD1) and
FCHSD2. These proteins have a common domain structure
consisting of an N-terminal F-BAR (FES-CIP4 Homology
and Bin/Amphiphysin/Rvs), two SH3, and C-terminal
proline-rich domains. They have only been characterized
in silico and their functions remain unknown. This
group also includes the insect protein, nervous wreck,
which acts as a regulator of synaptic growth signaling.
SH3 domains are protein interaction domains that bind
to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 28.9 bits (65), Expect = 0.044
Identities = 11/32 (34%), Positives = 16/32 (50%)
Query: 18 TYKYTREDVDELSFDVGEIIRVVEYDDPEEQV 49
Y Y + DEL+ GE + V+E D + V
Sbjct: 7 LYSYEAQRPDELTITEGEELEVIEDGDGDGWV 38
>gnl|CDD|212936 cd12003, SH3_EFS, Src homology 3 domain of CAS (Crk-Associated
Substrate) scaffolding protein family member, Embryonal
Fyn-associated Substrate. EFS is also called HEFS,
CASS3 (Cas scaffolding protein family member 3) or SIN
(Src-interacting protein). It was identified based on
interactions with the Src kinases, Fyn and Yes. It
plays a role in thymocyte development and acts as a
negative regulator of T cell proliferation. CAS
proteins function as molecular scaffolds to regulate
protein complexes that are involved in many cellular
processes. They share a common domain structure that
includes an N-terminal SH3 domain, an unstructured
substrate domain that contains many YxxP motifs, a
serine-rich four-helix bundle, and a FAT-like
C-terminal domain. The SH3 domain of CAS proteins binds
to diverse partners including FAK, FRNK, Pyk2,
PTP-PEST, DOCK180, among others. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 62
Score = 28.7 bits (64), Expect = 0.068
Identities = 8/27 (29%), Positives = 15/27 (55%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDP 45
Y E +ELSF G+++ V++ +
Sbjct: 7 YDNAAESPEELSFRRGDVLMVLKREHG 33
>gnl|CDD|212845 cd11912, SH3_Bzz1_1, First Src Homology 3 domain of Bzz1 and
similar domains. Bzz1 (or Bzz1p) is a
WASP/Las17-interacting protein involved in endocytosis
and trafficking to the vacuole. It physically interacts
with type I myosins and functions in the early steps of
endocytosis. Together with other proteins, it induces
membrane scission in yeast. Bzz1 contains an N-terminal
F-BAR (FES-CIP4 Homology and Bin/Amphiphysin/Rvs), a
central coiled-coil, and two C-terminal SH3 domains.
This model represents the first C-terminal SH3 domain.
SH3 domains are protein interaction domains that bind
to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 28.3 bits (64), Expect = 0.081
Identities = 12/26 (46%), Positives = 15/26 (57%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
Y YT DE+S GE + V+E DD
Sbjct: 6 YDYTASGDDEVSISEGEEVTVLEPDD 31
>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 = 28.0 bits (63), Expect = 0.10
Identities = 10/27 (37%), Positives = 16/27 (59%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDP 45
Y + ++ EL F G+II V++ DP
Sbjct: 6 YDFNPQEPGELEFRRGDIITVLDSSDP 32
>gnl|CDD|212789 cd11855, SH3_Sho1p, Src homology 3 domain of High osmolarity
signaling protein Sho1p. Sho1p (or Sho1), also called
SSU81 (Suppressor of SUA8-1 mutation), is a yeast
membrane protein that regulates adaptation to high salt
conditions by activating the HOG (high-osmolarity
glycerol) pathway. High salt concentrations lead to the
localization to the membrane of the MAPKK Pbs2, which
is then activated by the MAPKK Ste11 and in turn,
activates the MAPK Hog1. Pbs2 is localized to the
membrane though the interaction of its PxxP motif with
the SH3 domain of Sho1p. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 28.2 bits (63), Expect = 0.11
Identities = 10/25 (40%), Positives = 17/25 (68%)
Query: 17 FTYKYTREDVDELSFDVGEIIRVVE 41
+ Y + +D +ELSF+ GEI+ V +
Sbjct: 6 YPYDASPDDPNELSFEKGEILEVSD 30
>gnl|CDD|212932 cd11999, SH3_PACSIN_like, Src homology 3 domain of an unknown
subfamily of proteins with similarity to Protein kinase
C and Casein kinase Substrate in Neurons (PACSIN)
proteins. PACSINs, also called Synaptic
dynamin-associated proteins (Syndapins), act as
regulators of cytoskeletal and membrane dynamics. They
bind both dynamin and Wiskott-Aldrich syndrome protein
(WASP), and may provide direct links between the actin
cytoskeletal machinery through WASP and
dynamin-dependent endocytosis. Vetebrates harbor three
isoforms with distinct expression patterns and specific
functions. PACSINs contain an N-terminal F-BAR domain
and a C-terminal SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 56
Score = 27.6 bits (61), Expect = 0.15
Identities = 13/28 (46%), Positives = 18/28 (64%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
Y YT ++ DELSF GE + VE +D +
Sbjct: 8 YDYTGQEPDELSFKAGEELLKVEDEDEQ 35
>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 = 27.3 bits (61), Expect = 0.17
Identities = 11/30 (36%), Positives = 17/30 (56%), Gaps = 2/30 (6%)
Query: 18 TYKYTREDVDELSFDVGEIIRVVEYDDPEE 47
+ YT ++ DEL VG+ I V+ + EE
Sbjct: 5 LFSYTPQNEDELELKVGDTIEVL--GEVEE 32
>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 = 27.3 bits (61), Expect = 0.18
Identities = 12/32 (37%), Positives = 18/32 (56%)
Query: 16 YFTYKYTREDVDELSFDVGEIIRVVEYDDPEE 47
Y + Y E+ DELSF G+ + V+ D +E
Sbjct: 4 YALFDYEAENGDELSFREGDELTVLRKGDDDE 35
>gnl|CDD|212777 cd11843, SH3_PACSIN, Src homology 3 domain of Protein kinase C
and Casein kinase Substrate in Neurons (PACSIN)
proteins. PACSINs, also called Synaptic
dynamin-associated proteins (Syndapins), act as
regulators of cytoskeletal and membrane dynamics. They
bind both dynamin and Wiskott-Aldrich syndrome protein
(WASP), and may provide direct links between the actin
cytoskeletal machinery through WASP and
dynamin-dependent endocytosis. Vetebrates harbor three
isoforms with distinct expression patterns and specific
functions. PACSINs contain an N-terminal F-BAR domain
and a C-terminal SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 53
Score = 27.4 bits (61), Expect = 0.18
Identities = 11/26 (42%), Positives = 17/26 (65%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
Y Y ++ DELSF G+I+ +E +D
Sbjct: 6 YDYEGQESDELSFKAGDILTKLEEED 31
>gnl|CDD|212760 cd11826, SH3_Abi, Src homology 3 domain of Abl Interactor
proteins. Abl interactor (Abi) proteins are adaptor
proteins serving as binding partners and substrates of
Abl tyrosine kinases. They are involved in regulating
actin cytoskeletal reorganization and play important
roles in membrane-ruffling, endocytosis, cell motility,
and cell migration. They localize to sites of actin
polymerization in epithelial adherens junction and
immune synapses, as well as to the leading edge of
lamellipodia. Vertebrates contain two Abi proteins,
Abi1 and Abi2. Abi1 displays a wide expression pattern
while Abi2 is highly expressed in the eye and brain.
Abi proteins contain a homeobox homology domain, a
proline-rich region, and a SH3 domain. The SH3 domain
of Abi binds to a PxxP motif in Abl. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 52
Score = 27.3 bits (61), Expect = 0.19
Identities = 14/27 (51%), Positives = 17/27 (62%), Gaps = 1/27 (3%)
Query: 19 YKYTREDVDELSFDVGEIIRVV-EYDD 44
Y YT + DELSF G+II V + DD
Sbjct: 6 YDYTADKDDELSFQEGDIIYVTKKNDD 32
>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 = 27.0 bits (60), Expect = 0.22
Identities = 10/26 (38%), Positives = 17/26 (65%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
Y YT ++ DELS G+++ V+E +
Sbjct: 6 YDYTAQEDDELSISKGDVVAVIEKGE 31
>gnl|CDD|212752 cd11818, SH3_Eve1_5, Fifth Src homology 3 domain of ADAM-binding
protein Eve-1. Eve-1, also called SH3
domain-containing protein 19 (SH3D19) or EEN-binding
protein (EBP), exists in multiple alternatively spliced
isoforms. The longest isoform contains five SH3 domain
in the C-terminal region and seven proline-rich motifs
in the N-terminal region. It is abundantly expressed in
skeletal muscle and heart, and may be involved in
regulating the activity of ADAMs (A disintegrin and
metalloproteases). Eve-1 interacts with EEN, an
endophilin involved in endocytosis and may be the
target of the MLL-EEN fusion protein that is implicated
in leukemogenesis. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 50
Score = 27.1 bits (60), Expect = 0.22
Identities = 14/28 (50%), Positives = 18/28 (64%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
Y +T E+ DELSF G+II +E D E
Sbjct: 6 YDFTGENEDELSFKAGDIITELESIDEE 33
>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 = 27.3 bits (61), Expect = 0.22
Identities = 10/26 (38%), Positives = 15/26 (57%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
Y Y + +E+SF G+II +E D
Sbjct: 6 YDYQAAEDNEISFVEGDIITQIEQID 31
>gnl|CDD|212712 cd11778, SH3_Bzz1_2, Second Src Homology 3 domain of Bzz1 and
similar domains. Bzz1 (or Bzz1p) is a
WASP/Las17-interacting protein involved in endocytosis
and trafficking to the vacuole. It physically interacts
with type I myosins and functions in the early steps of
endocytosis. Together with other proteins, it induces
membrane scission in yeast. Bzz1 contains an N-terminal
F-BAR (FES-CIP4 Homology and Bin/Amphiphysin/Rvs), a
central coiled-coil, and two C-terminal SH3 domains.
This model represents the second C-terminal SH3 domain.
SH3 domains are protein interaction domains that bind
to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 51
Score = 27.1 bits (60), Expect = 0.24
Identities = 11/26 (42%), Positives = 15/26 (57%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
Y Y + DE+S VG+ I V+ DD
Sbjct: 6 YDYEAQGDDEISIRVGDRIAVIRGDD 31
>gnl|CDD|212905 cd11972, SH3_Abi2, Src homology 3 domain of Abl Interactor 2.
Abi2 is highly expressed in the brain and eye. It
regulates actin cytoskeletal reorganization at adherens
junctions and dendritic spines, which is important in
cell morphogenesis, migration, and cognitive function.
Mice deficient with Abi2 show defects in orientation
and migration of lens fibers, neuronal migration,
dendritic spine morphology, as well as deficits in
learning and memory. Abi proteins are adaptor proteins
serving as binding partners and substrates of Abl
tyrosine kinases. They are involved in regulating actin
cytoskeletal reorganization and play important roles in
membrane-ruffling, endocytosis, cell motility, and cell
migration. Abi proteins contain a homeobox homology
domain, a proline-rich region, and a SH3 domain. The
SH3 domain of Abi binds to a PxxP motif in Abl. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 61
Score = 27.3 bits (60), Expect = 0.25
Identities = 13/26 (50%), Positives = 18/26 (69%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
Y YT++ DELSF G II V++ +D
Sbjct: 9 YDYTKDKEDELSFQEGAIIYVIKKND 34
>gnl|CDD|212820 cd11887, SH3_Bbc1, Src Homology 3 domain of Bbc1 and similar
domains. This subfamily is composed of Saccharomyces
cerevisiae Bbc1p, also called Mti1p (Myosin tail
region-interacting protein), and similar proteins.
Bbc1p interacts with and regulates type I myosins in
yeast, Myo3p and Myo5p, which are involved in actin
cytoskeletal reorganization. It also binds and inhibits
Las17, a WASp family protein that functions as an
activator of the Arp2/3 complex. Bbc1p contains an
N-terminal SH3 domain. SH3 domains bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs; they play a role in the
regulation of enzymes by intramolecular interactions,
changing the subcellular localization of signal pathway
components and mediate multiprotein complex assemblies.
Length = 60
Score = 26.9 bits (60), Expect = 0.25
Identities = 12/28 (42%), Positives = 19/28 (67%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
Y Y + D+L+FDVG++I V E +D +
Sbjct: 8 YPYESDHEDDLNFDVGQLITVTEEEDAD 35
>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 = 27.0 bits (60), Expect = 0.26
Identities = 11/28 (39%), Positives = 16/28 (57%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
+ + E DELSF G++I + EY E
Sbjct: 6 FDFEGEQEDELSFSEGDVITLKEYVGEE 33
>gnl|CDD|212893 cd11960, SH3_Abp1_eu, Src homology 3 domain of eumetazoan
Actin-binding protein 1. Abp1, also called
drebrin-like protein, is an adaptor protein that
functions in receptor-mediated endocytosis and vesicle
trafficking. It contains an N-terminal actin-binding
module, the actin-depolymerizing factor (ADF) homology
domain, a helical domain, and a C-terminal SH3 domain.
Mammalian Abp1, unlike yeast Abp1, does not contain an
acidic domain that interacts with the Arp2/3 complex.
It regulates actin dynamics indirectly by interacting
with dynamin and WASP family proteins. Abp1 deficiency
causes abnormal organ structure and function of the
spleen, heart, and lung of mice. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 54
Score = 27.0 bits (60), Expect = 0.28
Identities = 12/26 (46%), Positives = 15/26 (57%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
Y Y D E+SFD G+II +E D
Sbjct: 6 YDYQAADDTEISFDPGDIITDIEQID 31
>gnl|CDD|212701 cd11767, SH3_Nck_3, Third Src Homology 3 domain of Nck adaptor
proteins. This group contains the third SH3 domain of
Nck, the first SH3 domain of Caenorhabditis elegans
Ced-2 (Cell death abnormality protein 2), and similar
domains. Nck adaptor proteins regulate actin
cytoskeleton dynamics by linking proline-rich effector
molecules to protein tyrosine kinases and
phosphorylated signaling intermediates. They contain
three SH3 domains and a C-terminal SH2 domain. They
function downstream of the PDGFbeta receptor and are
involved in Rho GTPase signaling and actin dynamics.
Vertebrates contain two Nck adaptor proteins: Nck1
(also called Nckalpha) and Nck2 (also called Nckbeta or
Growth factor receptor-bound protein 4, Grb4), which
show partly overlapping functions but also bind
distinct targets. Their SH3 domains are involved in
recruiting downstream effector molecules, such as the
N-WASP/Arp2/3 complex, which when activated induces
actin polymerization that results in the production of
pedestals, or protrusions of the plasma membrane. The
third SH3 domain of Nck appears to prefer ligands with
a PxAPxR motif. SH3 domains are protein interaction
domains that usually bind to proline-rich ligands with
moderate affinity and selectivity, preferentially a
PxxP motif. Ced-2 is a cell corpse engulfment protein
that interacts with Ced-5 in a pathway that regulates
the activation of Ced-10, a Rac small GTPase.
Length = 56
Score = 26.9 bits (60), Expect = 0.29
Identities = 13/31 (41%), Positives = 21/31 (67%), Gaps = 2/31 (6%)
Query: 18 TYKYTREDVDELSFDVGEIIRVVE--YDDPE 46
Y +T E+ +ELSF+ GE + ++E DDP+
Sbjct: 5 LYPFTGENDEELSFEKGERLEIIEKPEDDPD 35
>gnl|CDD|212762 cd11828, SH3_ARHGEF9_like, Src homology 3 domain of ARHGEF9-like
Rho guanine nucleotide exchange factors. Members of
this family contain a SH3 domain followed by RhoGEF
(also called Dbl-homologous or DH) and Pleckstrin
Homology (PH) domains. They include the Rho guanine
nucleotide exchange factors ARHGEF9, ASEF (also called
ARHGEF4), ASEF2, and similar proteins. GEFs activate
small GTPases by exchanging bound GDP for free GTP.
ARHGEF9 specifically activates Cdc42, while both ASEF
and ASEF2 can activate Rac1 and Cdc42. ARHGEF9 is
highly expressed in the brain and it interacts with
gephyrin, a postsynaptic protein associated with GABA
and glycine receptors. ASEF plays a role in
angiogenesis and cell migration. ASEF2 is important in
cell migration and adhesion dynamics. ASEF exists in an
autoinhibited form and is activated upon binding of the
tumor suppressor APC (adenomatous polyposis coli),
leading to the activation of Rac1 or Cdc42. In its
autoinhibited form, the SH3 domain of ASEF forms an
extensive interface with the DH and PH domains,
blocking the Rac binding site. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 53
Score = 26.6 bits (59), Expect = 0.33
Identities = 8/22 (36%), Positives = 14/22 (63%)
Query: 25 DVDELSFDVGEIIRVVEYDDPE 46
D +EL F G++I V++ D +
Sbjct: 12 DPEELGFKAGDVIEVLDMSDKD 33
>gnl|CDD|212904 cd11971, SH3_Abi1, Src homology 3 domain of Abl Interactor 1.
Abi1, also called e3B1, is a central regulator of actin
cytoskeletal reorganization through interactions with
many protein complexes. It is part of WAVE, a
nucleation-promoting factor complex, that links Rac 1
activation to actin polymerization causing lamellipodia
protrusion at the plasma membrane. Abi1 interact with
formins to promote protrusions at the leading edge of
motile cells. It also is a target of alpha4 integrin,
regulating membrane protrusions at sites of integrin
engagement. Abi proteins are adaptor proteins serving
as binding partners and substrates of Abl tyrosine
kinases. They are involved in regulating actin
cytoskeletal reorganization and play important roles in
membrane-ruffling, endocytosis, cell motility, and cell
migration. Abi proteins contain a homeobox homology
domain, a proline-rich region, and a SH3 domain. The
SH3 domain of Abi binds to a PxxP motif in Abl. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 26.9 bits (59), Expect = 0.36
Identities = 12/26 (46%), Positives = 18/26 (69%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
Y Y+++ DELSF G II V++ +D
Sbjct: 6 YDYSKDKDDELSFMEGAIIYVIKKND 31
>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 = 26.6 bits (59), Expect = 0.42
Identities = 12/26 (46%), Positives = 16/26 (61%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
Y Y + +ELSF G IIR++ DD
Sbjct: 6 YDYEAQSDEELSFPEGAIIRILRKDD 31
>gnl|CDD|212933 cd12000, SH3_CASS4, Src homology 3 domain of CAS (Crk-Associated
Substrate) scaffolding protein family member 4. CASS4,
also called HEPL (HEF1-EFS-p130Cas-like), localizes to
focal adhesions and plays a role in regulating FAK
activity, focal adhesion integrity, and cell spreading.
It is most abundant in blood cells and lung tissue, and
is also found in high levels in leukemia and ovarian
cell lines. CAS proteins function as molecular
scaffolds to regulate protein complexes that are
involved in many cellular processes. They share a
common domain structure that includes an N-terminal SH3
domain, an unstructured substrate domain that contains
many YxxP motifs, a serine-rich four-helix bundle, and
a FAT-like C-terminal domain. The SH3 domain of CAS
proteins binds to diverse partners including FAK, FRNK,
Pyk2, PTP-PEST, DOCK180, among others. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 57
Score = 26.4 bits (58), Expect = 0.44
Identities = 10/30 (33%), Positives = 17/30 (56%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPEEQ 48
Y + DEL+F G+I+ V+E + P +
Sbjct: 7 YDNKADCSDELAFRRGDILTVLEQNVPGSE 36
>gnl|CDD|212957 cd12024, SH3_NoxO1_2, Second or C-terminal Src homology 3 domain
of NADPH oxidase (Nox) Organizing protein 1. Nox
Organizing protein 1 (NoxO1) is a critical regulator of
enzyme kinetics of the nonphagocytic NADPH oxidase
Nox1, which catalyzes the transfer of electrons from
NADPH to molecular oxygen to form superoxide. Nox1 is
expressed in colon, stomach, uterus, prostate, and
vascular smooth muscle cells. NoxO1 is involved in
targeting activator subunits (such as NoxA1) to Nox1.
It is co-localized with Nox1 in the membranes of
resting cells and directs the subcellular localization
of Nox1. NoxO1 contains an N-terminal Phox homology
(PX) domain, tandem SH3 domains (N-SH3 and C-SH3), and
a C-terminal proline-rich region (PRR). This model
characterizes the second SH3 domain (or C-SH3) of
NoxO1. The tandem SH3 domains of NoxO1 interact with
the PRR of p22phox, which also complexes with Nox1. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 26.1 bits (58), Expect = 0.54
Identities = 10/31 (32%), Positives = 17/31 (54%), Gaps = 1/31 (3%)
Query: 15 LYFTYK-YTREDVDELSFDVGEIIRVVEYDD 44
LY+ + Y + DELS G ++ V++ D
Sbjct: 1 LYYATRAYEAQKEDELSVPAGVVVEVLQKSD 31
>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 = 26.3 bits (58), Expect = 0.54
Identities = 9/27 (33%), Positives = 17/27 (62%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDP 45
Y + + DEL F+ G++I V++ +P
Sbjct: 6 YDFEALEDDELGFNSGDVIEVLDSSNP 32
>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 = 26.1 bits (57), Expect = 0.65
Identities = 12/27 (44%), Positives = 19/27 (70%), Gaps = 1/27 (3%)
Query: 19 YKYTREDVDELSFDVG-EIIRVVEYDD 44
Y YT ++ DELSF G E++++ E D+
Sbjct: 8 YDYTGQEADELSFKAGEELLKIGEEDE 34
>gnl|CDD|212949 cd12016, SH3_Tks_2, Second Src homology 3 domain of Tyrosine
kinase substrate (Tks) proteins. Tks proteins are Src
substrates and scaffolding proteins that play important
roles in the formation of podosomes and invadopodia,
the dynamic actin-rich structures that are related to
cell migration and cancer cell invasion. Vertebrates
contain two Tks proteins, Tks4 (Tyr kinase substrate
with four SH3 domains) and Tks5 (Tyr kinase substrate
with five SH3 domains), which display partially
overlapping but non-redundant functions. Both associate
with the ADAMs family of transmembrane
metalloproteases, which function as sheddases and
mediators of cell and matrix interactions. Tks5
interacts with N-WASP and Nck, while Tks4 is essential
for the localization of MT1-MMP (membrane-type 1 matrix
metalloproteinase) to invadopodia. Tks proteins contain
an N-terminal Phox homology (PX) domain and four or
five SH3 domains. This model characterizes the second
SH3 domain of Tks proteins. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 54
Score = 25.9 bits (57), Expect = 0.71
Identities = 8/24 (33%), Positives = 15/24 (62%)
Query: 18 TYKYTREDVDELSFDVGEIIRVVE 41
T Y E+ DE+ F+ G ++ V++
Sbjct: 6 TQAYKAENEDEIGFETGVVVEVIQ 29
>gnl|CDD|212892 cd11959, SH3_Cortactin, Src homology 3 domain of Cortactin.
Cortactin was originally identified as a substrate of
Src kinase. It is an actin regulatory protein that
binds to the Arp2/3 complex and stabilizes branched
actin filaments. It is involved in cellular processes
that affect cell motility, adhesion, migration,
endocytosis, and invasion. It is expressed ubiquitously
except in hematopoietic cells, where the homolog
hematopoietic lineage cell-specific 1 (HS1) is
expressed instead. Cortactin contains an N-terminal
acidic domain, several copies of a repeat domain found
in cortactin and HS1, a proline-rich region, and a
C-terminal SH3 domain. The N-terminal region interacts
with the Arp2/3 complex and F-actin, and is crucial in
regulating branched actin assembly. Cortactin also
serves as a scaffold and provides a bridge to the actin
cytoskeleton for membrane trafficking and signaling
proteins that bind to its SH3 domain. Binding partners
for the SH3 domain of cortactin include dynamin2,
N-WASp, MIM, FGD1, among others. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 53
Score = 25.5 bits (56), Expect = 0.94
Identities = 12/26 (46%), Positives = 15/26 (57%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
Y Y D DE+SFD +II +E D
Sbjct: 6 YDYQAADDDEISFDPDDIITNIEMID 31
>gnl|CDD|216988 pfam02353, CMAS, Mycolic acid cyclopropane synthetase. This family
consist of Cyclopropane-fatty-acyl-phospholipid synthase
or CFA synthase EC:2.1.1.79 this enzyme catalyze the
reaction: S-adenosyl-L-methionine + phospholipid
olefinic fatty acid <=> S-adenosyl-L-homocysteine +
phospholipid cyclopropane fatty acid.
Length = 273
Score = 26.5 bits (59), Expect = 0.98
Identities = 10/37 (27%), Positives = 18/37 (48%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPEEQVDKIFSL 55
YK+ R+ V + + +Y D +E D+I S+
Sbjct: 98 YKHARQRVAAEGLQRKVEVLLQDYRDFDEPFDRIVSV 134
>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 = 25.1 bits (56), Expect = 1.2
Identities = 9/27 (33%), Positives = 16/27 (59%)
Query: 20 KYTREDVDELSFDVGEIIRVVEYDDPE 46
Y D +ELS G++++V++ DD
Sbjct: 7 DYVATDPNELSLKKGDVVKVLDKDDNG 33
>gnl|CDD|212815 cd11882, SH3_GRAF-like, Src Homology 3 domain of GTPase Regulator
Associated with Focal adhesion kinase and similar
proteins. This subfamily is composed of Rho GTPase
activating proteins (GAPs) with similarity to GRAF.
Members contain an N-terminal BAR domain, followed by a
Pleckstrin homology (PH) domain, a Rho GAP domain, and
a C-terminal SH3 domain. Although vertebrates harbor
four Rho GAPs in the GRAF subfamily including GRAF,
GRAF2, GRAF3, and Oligophrenin-1 (OPHN1), only three
are included in this model. OPHN1 contains the BAR, PH
and GAP domains, but not the C-terminal SH3 domain.
GRAF and GRAF2 show GAP activity towards RhoA and
Cdc42. GRAF influences Rho-mediated cytoskeletal
rearrangements and binds focal adhesion kinase. GRAF2
regulates caspase-activated p21-activated protein
kinase-2. The SH3 domain of GRAF and GRAF2 binds
PKNbeta, a target of the small GTPase Rho. SH3 domains
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs; they play a
role in the regulation of enzymes by intramolecular
interactions, changing the subcellular localization of
signal pathway components and mediate multiprotein
complex assemblies.
Length = 54
Score = 24.9 bits (55), Expect = 1.3
Identities = 13/28 (46%), Positives = 16/28 (57%), Gaps = 1/28 (3%)
Query: 19 YKYTREDVDELSFDVGEII-RVVEYDDP 45
Y ED ELSF+ G+II V D+P
Sbjct: 6 YACKAEDESELSFEPGQIITNVQPSDEP 33
>gnl|CDD|212755 cd11821, SH3_ASAP, Src homology 3 domain of ArfGAP with SH3
domain, ankyrin repeat and PH domain containing
proteins. ASAPs are Arf GTPase activating proteins
(GAPs) and they function in regulating cell growth,
migration, and invasion. They contain an N-terminal BAR
domain, followed by a Pleckstrin homology (PH) domain,
an Arf GAP domain, ankyrin (ANK) repeats, and a
C-terminal SH3 domain. Vertebrates contain at least
three members, ASAP1, ASAP2, and ASAP3, but some ASAP3
proteins do not seem to harbor a C-terminal SH3 domain.
ASAP1 and ASAP2 show GTPase activating protein (GAP)
activity towards Arf1 and Arf5. They do not show GAP
activity towards Arf6, but are able to mediate Arf6
signaling by binding stably to GTP-Arf6. ASAP3 is an
Arf6-specific GAP. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 25.0 bits (55), Expect = 1.4
Identities = 11/20 (55%), Positives = 13/20 (65%)
Query: 27 DELSFDVGEIIRVVEYDDPE 46
DEL+F GEII V +D E
Sbjct: 14 DELTFSEGEIIVVTGEEDDE 33
>gnl|CDD|212744 cd11810, SH3_RUSC1_like, Src homology 3 domain of RUN and SH3
domain-containing proteins 1 and 2. RUSC1 and RUSC2,
that were originally characterized in silico. They are
adaptor proteins consisting of RUN, leucine zipper, and
SH3 domains. RUSC1, also called NESCA (New molecule
containing SH3 at the carboxy-terminus), is highly
expressed in the brain and is translocated to the
nuclear membrane from the cytoplasm upon stimulation
with neurotrophin. It plays a role in facilitating
neurotrophin-dependent neurite outgrowth. It also
interacts with NEMO (or IKKgamma) and may function in
NEMO-mediated activation of NF-kB. RUSC2, also called
Iporin, is expressed ubiquitously with highest amounts
in the brain and testis. It interacts with the small
GTPase Rab1 and the Golgi matrix protein GM130, and may
function in linking GTPases to certain intracellular
signaling pathways. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 50
Score = 25.1 bits (55), Expect = 1.4
Identities = 10/22 (45%), Positives = 14/22 (63%), Gaps = 1/22 (4%)
Query: 24 EDVDELSFDVGEIIRVV-EYDD 44
D +LSF G+I+RV+ DD
Sbjct: 11 TDSGQLSFRKGDILRVIARVDD 32
>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 = 25.1 bits (55), Expect = 1.5
Identities = 12/28 (42%), Positives = 17/28 (60%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
Y +T E ++LSF G+ I V E+ D E
Sbjct: 6 YDFTGETEEDLSFQRGDRILVTEHLDAE 33
>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 = 24.9 bits (54), Expect = 1.5
Identities = 13/35 (37%), Positives = 20/35 (57%), Gaps = 2/35 (5%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPEEQVDKIF 53
Y YT + +ELSF G +IR++ ++ VD F
Sbjct: 6 YSYTGQSPEELSFPEGALIRLLP--RAQDGVDDGF 38
>gnl|CDD|212921 cd11988, SH3_Intersectin2_1, First Src homology 3 domain (or
SH3A) of Intersectin-2. Intersectin-2 (ITSN2) is an
adaptor protein that functions in exo- and endocytosis,
actin cytoskeletal reorganization, and signal
transduction. It plays a role in clathrin-coated pit
(CCP) formation. It binds to many proteins through its
multidomain structure and facilitate the assembly of
multimeric complexes. ITSN2 also functions as a
specific GEF for Cdc42 activation in epithelial
morphogenesis, and is required in mitotic spindle
orientation. It exists in alternatively spliced short
and long isoforms. The short isoform contains two Eps15
homology domains (EH1 and EH2), a coiled-coil region
and five SH3 domains (SH3A-E), while the long isoform,
in addition, contains RhoGEF (also called
Dbl-homologous or DH), Pleckstrin homology (PH) and C2
domains. The first SH3 domain (or SH3A) of ITSN2 is
expected to bind many protein partners, similar to
ITSN1 which has been shown to bind Sos1, dynamin1/2,
CIN85, c-Cbl, PI3K-C2, SHIP2, N-WASP, and CdGAP, among
others. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 25.2 bits (55), Expect = 1.5
Identities = 10/23 (43%), Positives = 16/23 (69%)
Query: 19 YKYTREDVDELSFDVGEIIRVVE 41
Y + + DE+SF+ G+II+V E
Sbjct: 8 YPFEARNHDEMSFNAGDIIQVDE 30
>gnl|CDD|212796 cd11862, SH3_MPP, Src Homology 3 domain of Membrane Protein,
Palmitoylated (or MAGUK p55 subfamily member) proteins.
The MPP/p55 subfamily of MAGUK (membrane-associated
guanylate kinase) proteins includes at least eight
vertebrate members (MPP1-7 and CASK), four Drosophila
proteins (Stardust, Varicose, CASK and Skiff), and
other similar proteins; they all contain one each of
the core of three domains characteristic of MAGUK
proteins: PDZ, SH3, and guanylate kinase (GuK). In
addition, most members except for MPP1 contain
N-terminal L27 domains and some also contain a Hook
(Protein 4.1 Binding) motif in between the SH3 and GuK
domains. CASK has an additional calmodulin-dependent
kinase (CaMK)-like domain at the N-terminus. Members of
this subfamily are scaffolding proteins that play
important roles in regulating and establishing cell
polarity, cell adhesion, and synaptic targeting and
transmission, among others. The GuK domain in MAGUK
proteins is enzymatically inactive; instead, the domain
mediates protein-protein interactions and associates
intramolecularly with the SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 61
Score = 24.8 bits (55), Expect = 1.6
Identities = 9/17 (52%), Positives = 13/17 (76%)
Query: 29 LSFDVGEIIRVVEYDDP 45
LSF G+I+++V DDP
Sbjct: 23 LSFKKGDILQIVNQDDP 39
>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 = 24.9 bits (55), Expect = 1.6
Identities = 9/28 (32%), Positives = 15/28 (53%)
Query: 18 TYKYTREDVDELSFDVGEIIRVVEYDDP 45
Y + DE+S GE++ V+E +D
Sbjct: 5 IADYEAQGDDEISLQEGEVVEVLEKNDS 32
>gnl|CDD|212880 cd11947, SH3_GRAP2_N, N-terminal Src homology 3 domain of
GRB2-related adaptor protein 2. GRAP2 is also called
GADS (GRB2-related adapter downstream of Shc), GrpL,
GRB2L, Mona, or GRID (Grb2-related protein with insert
domain). It is expressed specifically in the
hematopoietic system. It plays an important role in T
cell receptor (TCR) signaling by promoting the
formation of the SLP-76:LAT complex, which couples the
TCR to the Ras pathway. It also have roles in
antigen-receptor and tyrosine kinase mediated
signaling. GRAP2 is unique from other GRB2-like adaptor
proteins in that it can be regulated by caspase
cleavage. It contains an N-terminal SH3 domain, a
central SH2 domain, and a C-terminal SH3 domain. The
N-terminal SH3 domain of the related protein GRB2 binds
to Sos and Sos-derived proline-rich peptides. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 24.8 bits (54), Expect = 1.7
Identities = 9/26 (34%), Positives = 17/26 (65%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
+ +T DELSF G++++++ DD
Sbjct: 6 FDFTASGEDELSFKKGDVLKILSSDD 31
>gnl|CDD|236291 PRK08565, PRK08565, DNA-directed RNA polymerase subunit B;
Provisional.
Length = 1103
Score = 26.1 bits (58), Expect = 1.7
Identities = 15/36 (41%), Positives = 23/36 (63%), Gaps = 9/36 (25%)
Query: 20 KYTREDVD-----ELSFDVGEIIR--VVEYDDPEEQ 48
K TRE V+ EL+FD ++++ V+EY D EE+
Sbjct: 571 KLTREHVEKLKKGELTFD--DLVKMGVIEYLDAEEE 604
>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 = 24.9 bits (54), Expect = 1.9
Identities = 11/33 (33%), Positives = 18/33 (54%)
Query: 15 LYFTYKYTREDVDELSFDVGEIIRVVEYDDPEE 47
+Y + Y+ E DELSF G+++ V+ D
Sbjct: 3 VYALWDYSAEFPDELSFKEGDMVTVLRKDGEGT 35
>gnl|CDD|212770 cd11836, SH3_Intersectin_1, First Src homology 3 domain (or SH3A)
of Intersectin. Intersectins (ITSNs) are adaptor
proteins that function in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction.
They are essential for initiating clathrin-coated pit
formation. They bind to many proteins through their
multidomain structure and facilitate the assembly of
multimeric complexes. Vertebrates contain two ITSN
proteins, ITSN1 and ITSN2, which exist in alternatively
spliced short and long isoforms. The short isoforms
contain two Eps15 homology domains (EH1 and EH2), a
coiled-coil region and five SH3 domains (SH3A-E), while
the long isoforms, in addition, contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin homology (PH)
and C2 domains. ITSN1 and ITSN2 are both widely
expressed, with variations depending on tissue type and
stage of development. The first SH3 domain (or SH3A) of
ITSN1 has been shown to bind many proteins including
Sos1, dynamin1/2, CIN85, c-Cbl, PI3K-C2, SHIP2, N-WASP,
and CdGAP, among others. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 55
Score = 24.6 bits (54), Expect = 2.1
Identities = 11/28 (39%), Positives = 16/28 (57%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
Y + + DE+SF G+II+V E E
Sbjct: 6 YAFEARNPDEISFQPGDIIQVDESQVAE 33
>gnl|CDD|213006 cd12073, SH3_HS1, Src homology 3 domain of Hematopoietic lineage
cell-specific protein 1. HS1, also called HCLS1
(hematopoietic cell-specific Lyn substrate 1), is a
cortactin homolog expressed specifically in
hematopoietic cells. It is an actin regulatory protein
that binds the Arp2/3 complex and stabilizes branched
actin filaments. It is required for cell spreading and
signaling in lymphocytes. It regulates cytoskeletal
remodeling that controls lymphocyte trafficking, and it
also affects tissue invasion and infiltration of
leukemic B cells. Like cortactin, HS1 contains an
N-terminal acidic domain, several copies of a repeat
domain found in cortactin and HS1, a proline-rich
region, and a C-terminal SH3 domain. The N-terminal
region binds the Arp2/3 complex and F-actin, while the
C-terminal region acts as an adaptor or scaffold that
can connect varied proteins that bind the SH3 domain
within the actin network. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 55
Score = 24.8 bits (54), Expect = 2.1
Identities = 12/26 (46%), Positives = 14/26 (53%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
Y Y E DE+SFD E I +E D
Sbjct: 7 YDYQGEGDDEISFDPQETITDIEMVD 32
>gnl|CDD|212708 cd11774, SH3_Sla1p_2, Second Src Homology 3 domain of the fungal
endocytic adaptor protein Sla1p. Sla1p facilitates
endocytosis by playing a role as an adaptor protein in
coupling components of the actin cytoskeleton to the
endocytic machinery. It interacts with Abp1p, Las17p
and Pan1p, which are activator proteins of
actin-related protein 2/3 (Arp2/3). Sla1p contains
multiple domains including three SH3 domains, a SAM
(sterile alpha motif) domain, and a Sla1 homology
domain 1 (SHD1), which binds to the NPFXD motif that is
found in many integral membrane proteins such as the
Golgi-localized Arf-binding protein Lsb5p and the
P4-ATPases, Drs2p and Dnf1p. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 52
Score = 24.3 bits (53), Expect = 2.2
Identities = 9/28 (32%), Positives = 17/28 (60%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
Y Y ++ +ELSF+ G+ + V + D +
Sbjct: 6 YDYDKQTEEELSFNEGDTLDVYDDSDSD 33
>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 = 24.5 bits (53), Expect = 2.2
Identities = 9/23 (39%), Positives = 15/23 (65%)
Query: 19 YKYTREDVDELSFDVGEIIRVVE 41
++Y ++ DEL VG+II + E
Sbjct: 7 FEYVPQNEDELELKVGDIIDINE 29
>gnl|CDD|212837 cd11904, SH3_Nck1_3, Third Src Homology 3 domain of Nck1 adaptor
protein. Nck1 (also called Nckalpha) plays a crucial
role in connecting signaling pathways of tyrosine
kinase receptors and important effectors in actin
dynamics and cytoskeletal remodeling. It binds and
activates RasGAP, resulting in the downregulation of
Ras. It is also involved in the signaling of
endothilin-mediated inhibition of cell migration. Nck
adaptor proteins regulate actin cytoskeleton dynamics
by linking proline-rich effector molecules to protein
tyrosine kinases and phosphorylated signaling
intermediates. They contain three SH3 domains and a
C-terminal SH2 domain. They function downstream of the
PDGFbeta receptor and are involved in Rho GTPase
signaling and actin dynamics. Vertebrates contain two
Nck adaptor proteins: Nck1 (also called Nckalpha) and
Nck2, which show partly overlapping functions but also
bind distinct targets. The third SH3 domain of Nck
appears to prefer ligands with a PxAPxR motif. SH3
domains are protein interaction domains that usually
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially a PxxP motif. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 24.6 bits (53), Expect = 2.3
Identities = 11/30 (36%), Positives = 21/30 (70%), Gaps = 2/30 (6%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEY--DDPE 46
Y ++ + +EL+F+ GE++ V+E +DPE
Sbjct: 7 YPFSSSNDEELNFEKGEVMDVIEKPENDPE 36
>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 = 24.6 bits (53), Expect = 2.4
Identities = 11/28 (39%), Positives = 17/28 (60%), Gaps = 2/28 (7%)
Query: 17 FTYKYTREDVDELSFDVGEIIRVVEYDD 44
F ++ T ED ELSF G++I V ++
Sbjct: 6 FNFQQTNED--ELSFSKGDVIHVTRVEE 31
>gnl|CDD|212778 cd11844, SH3_CAS, Src homology 3 domain of CAS (Crk-Associated
Substrate) scaffolding proteins. CAS proteins function
as molecular scaffolds to regulate protein complexes
that are involved in many cellular processes including
migration, chemotaxis, apoptosis, differentiation, and
progenitor cell function. They mediate the signaling of
integrins at focal adhesions where they localize, and
thus, regulate cell invasion and survival.
Over-expression of these proteins is implicated in poor
prognosis, increased metastasis, and resistance to
chemotherapeutics in many cancers such as breast, lung,
melanoma, and glioblastoma. CAS proteins have also been
linked to the pathogenesis of inflammatory disorders,
Alzheimer's, Parkinson's, and developmental defects.
They share a common domain structure that includes an
N-terminal SH3 domain, an unstructured substrate domain
that contains many YxxP motifs, a serine-rich
four-helix bundle, and a FAT-like C-terminal domain.
Vertebrates contain four CAS proteins: BCAR1 (or
p130Cas), NEDD9 (or HEF1), EFS (or SIN), and CASS4 (or
HEPL). The SH3 domain of CAS proteins binds to diverse
partners including FAK, FRNK, Pyk2, PTP-PEST, DOCK180,
among others. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP
motifs. They play versatile and diverse roles in the
cell including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 24.6 bits (54), Expect = 2.5
Identities = 10/28 (35%), Positives = 15/28 (53%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPE 46
Y E DEL+F G+I+ V+E +
Sbjct: 6 YDNVAESPDELAFRRGDILTVLEQNTAG 33
>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 = 24.5 bits (54), Expect = 2.6
Identities = 11/28 (39%), Positives = 15/28 (53%), Gaps = 2/28 (7%)
Query: 17 FTYKYTREDVDELSFDVGEIIRVVEYDD 44
F Y+ RED ELS G+ + V+E
Sbjct: 6 FNYEAQRED--ELSLRKGDRVLVLEKSS 31
>gnl|CDD|212887 cd11954, SH3_ASPP1, Src Homology 3 domain of Apoptosis
Stimulating of p53 protein 1. ASPP1, like ASPP2,
activates the apoptotic function of the p53 family of
tumor suppressors (p53, p63, and p73). In addition, it
functions in the cytoplasm to regulate the nuclear
localization of the transcriptional cofactors YAP and
TAZ by inihibiting their phosphorylation; YAP and TAZ
are important regulators of cell expansion,
differentiation, migration, and invasion. ASPP1 is
downregulated in breast tumors expressing wild-type
p53. It contains a proline-rich region, four ankyrin
(ANK) repeats, and an SH3 domain at its C-terminal
half. The SH3 domain and the ANK repeats of ASPP1
contribute to the p53 binding site; they bind to the
DNA binding domain of p53. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 57
Score = 24.6 bits (53), Expect = 2.6
Identities = 11/34 (32%), Positives = 19/34 (55%)
Query: 14 LLYFTYKYTREDVDELSFDVGEIIRVVEYDDPEE 47
++Y + Y ++ DELSF G+ I ++ D E
Sbjct: 2 MVYALWDYEAQNADELSFQEGDAITILRRKDDSE 35
>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 = 24.2 bits (53), Expect = 2.6
Identities = 8/29 (27%), Positives = 16/29 (55%)
Query: 18 TYKYTREDVDELSFDVGEIIRVVEYDDPE 46
+ Y E+ DEL+ G+I+ ++ D +
Sbjct: 5 LFDYEAENEDELTLREGDIVTILSKDCED 33
>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 = 24.4 bits (53), Expect = 2.6
Identities = 11/29 (37%), Positives = 15/29 (51%)
Query: 18 TYKYTREDVDELSFDVGEIIRVVEYDDPE 46
+ Y + DEL F GEII ++ D E
Sbjct: 7 LFHYEGTNEDELDFKEGEIILIISKDTGE 35
>gnl|CDD|212955 cd12022, SH3_p47phox_2, Second or C-terminal Src homology 3
domain of the p47phox subunit of NADPH oxidase, also
called Neutrophil Cytosolic Factor 1. p47phox, or
NCF1, is a cytosolic subunit of the phagocytic NADPH
oxidase complex (also called Nox2 or gp91phox), which
plays a key role in the ability of phagocytes to defend
against bacterial infections. NADPH oxidase catalyzes
the transfer of electrons from NADPH to oxygen during
phagocytosis forming superoxide and reactive oxygen
species. p47phox is required for activation of NADH
oxidase and plays a role in translocation. It contains
an N-terminal Phox homology (PX) domain, tandem SH3
domains (N-SH3 and C-SH3), a polybasic/autoinhibitory
region, and a C-terminal proline-rich region (PRR).
This model characterizes the second SH3 domain (or
C-SH3) of p47phox. In its inactive state, the tandem
SH3 domains interact intramolecularly with the
autoinhibitory region; upon activation, the tandem SH3
domains are exposed through a conformational change,
resulting in their binding to the PRR of p22phox and
the activation of NADPH oxidase. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 53
Score = 24.4 bits (53), Expect = 2.7
Identities = 13/27 (48%), Positives = 16/27 (59%), Gaps = 1/27 (3%)
Query: 15 LYFTYK-YTREDVDELSFDVGEIIRVV 40
LY T K YT + DEL+ GE I V+
Sbjct: 1 LYITIKAYTAVEEDELTLLEGEAIEVI 27
>gnl|CDD|212788 cd11854, SH3_Fus1p, Src homology 3 domain of yeast cell fusion
protein Fus1p. Fus1p is required at the cell surface
for cell fusion during the mating response in yeast. It
requires Bch1p and Bud7p, which are Chs5p-Arf1p binding
proteins, for localization to the plasma membrane. It
acts as a scaffold protein to assemble a cell surface
complex which is involved in septum degradation and
inhibition of the NOG pathway to promote cell fusion.
The SH3 domain of Fus1p interacts with Bin1p, a formin
that controls the assembly of actin cables in response
to Cdc42 signaling. It has been shown to bind the
motif, R(S/T)(S/T)SL, instead of PxxP motifs. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 24.2 bits (53), Expect = 3.2
Identities = 12/19 (63%), Positives = 14/19 (73%), Gaps = 1/19 (5%)
Query: 27 DELSFDVGEIIRVV-EYDD 44
DEL VGE +RV+ EYDD
Sbjct: 14 DELLIKVGETVRVLAEYDD 32
>gnl|CDD|212746 cd11812, SH3_AHI-1, Src Homology 3 domain of Abelson helper
integration site-1 (AHI-1). AHI-1, also called
Jouberin, is expressed in high levels in the brain,
gonad tissues, and skeletal muscle. It is an adaptor
protein that interacts with the small GTPase Rab8a and
regulates it distribution and function, affecting
cilium formation and vesicle transport. Mutations in
the AHI-1 gene can cause Joubert syndrome, a disorder
characterized by brainstem malformations, cerebellar
aplasia/hypoplasia, and retinal dystrophy. AHI-1
variation is also associated with susceptibility to
schizophrenia and type 2 diabetes mellitus progression.
AHI-1 contains WD40 and SH3 domains. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 52
Score = 24.0 bits (52), Expect = 3.3
Identities = 12/27 (44%), Positives = 16/27 (59%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDP 45
Y YT DEL+ G+IIRV+ D+
Sbjct: 6 YDYTANRSDELTIHRGDIIRVLYKDND 32
>gnl|CDD|212793 cd11859, SH3_ZO, Src homology 3 domain of the Tight junction
proteins, Zonula occludens (ZO) proteins. ZO proteins
are scaffolding proteins that associate with each other
and with other proteins of the tight junction, zonula
adherens, and gap junctions. They play roles in
regulating cytoskeletal dynamics at these cell
junctions. They are considered members of the MAGUK
(membrane-associated guanylate kinase) protein family,
which is characterized by the presence of a core of
three domains: PDZ, SH3, and guanylate kinase (GuK).
The GuK domain in MAGUK proteins is enzymatically
inactive; instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. Vertebrates contain three ZO proteins
(ZO-1, ZO-2, and ZO-3) with redundant and non-redundant
roles. They contain three PDZ domains, followed by SH3
and GuK domains; in addition, ZO-1 and ZO-2 contains a
proline-rich (PR) actin binding domain at the
C-terminus while ZO-3 contains this PR domain between
the second and third PDZ domains. The C-terminal
regions of the three ZO proteins are unique. The SH3
domain of ZO-1 has been shown to bind ZONAB, ZAK,
afadin, and Galpha12. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 62
Score = 24.2 bits (53), Expect = 3.3
Identities = 9/22 (40%), Positives = 12/22 (54%)
Query: 19 YKYTREDVDELSFDVGEIIRVV 40
+ Y + ELSF GE+ VV
Sbjct: 6 FDYEKPAKGELSFKKGEVFHVV 27
>gnl|CDD|212934 cd12001, SH3_BCAR1, Src homology 3 domain of the CAS
(Crk-Associated Substrate) scaffolding protein family
member, Breast Cancer Anti-estrogen Resistance 1.
BCAR1, also called p130cas or CASS1, is the founding
member of the CAS family of scaffolding proteins and
was originally identified through its ability to
associate with Crk. The name BCAR1 was designated
because the human gene was identified in a screen for
genes that promote resistance to tamoxifen. It is
widely expressed and its deletion is lethal in mice. It
plays a role in regulating cell motility, survival,
proliferation, transformation, cancer progression, and
bacterial pathogenesis. CAS proteins function as
molecular scaffolds to regulate protein complexes that
are involved in many cellular processes. They share a
common domain structure that includes an N-terminal SH3
domain, an unstructured substrate domain that contains
many YxxP motifs, a serine-rich four-helix bundle, and
a FAT-like C-terminal domain. The SH3 domain of CAS
proteins binds to diverse partners including FAK, FRNK,
Pyk2, PTP-PEST, DOCK180, among others. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 68
Score = 24.2 bits (52), Expect = 3.5
Identities = 12/25 (48%), Positives = 15/25 (60%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYD 43
Y E DELSF G+I+ V+E D
Sbjct: 9 YDNVAESPDELSFRKGDIMTVLERD 33
>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 = 24.0 bits (52), Expect = 4.3
Identities = 8/26 (30%), Positives = 16/26 (61%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
Y + + DEL F G+I++++ +D
Sbjct: 6 YSFQATESDELPFQKGDILKILNMED 31
>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 = 23.9 bits (52), Expect = 4.6
Identities = 11/31 (35%), Positives = 17/31 (54%), Gaps = 2/31 (6%)
Query: 18 TYKYTREDVDELSFDVGEIIRVVEYDDPEEQ 48
+ + D ++L F GEI+ V+ PEEQ
Sbjct: 6 LFDFPGNDDEDLPFKKGEILTVIR--KPEEQ 34
>gnl|CDD|212723 cd11789, SH3_Nebulin_family_C, C-terminal Src Homology 3 domain
of the Nebulin family of proteins. Nebulin family
proteins contain multiple nebulin repeats, and may
contain an N-terminal LIM domain and/or a C-terminal
SH3 domain. They have molecular weights ranging from 34
to 900 kD, depending on the number of nebulin repeats,
and they all bind actin. They are involved in the
regulation of actin filament architecture and function
as stabilizers and scaffolds for cytoskeletal
structures with which they associate, such as long
actin filaments or focal adhesions. Nebulin family
proteins that contain a C-terminal SH3 domain include
the giant filamentous protein nebulin, nebulette,
Lasp1, and Lasp2. Lasp2, also called LIM-nebulette, is
an alternatively spliced variant of nebulette. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 23.8 bits (52), Expect = 4.7
Identities = 11/23 (47%), Positives = 14/23 (60%)
Query: 19 YKYTREDVDELSFDVGEIIRVVE 41
Y Y D DE+SF G++I VE
Sbjct: 6 YDYAAADDDEVSFQEGDVIINVE 28
>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 = 23.6 bits (51), Expect = 4.7
Identities = 12/22 (54%), Positives = 16/22 (72%), Gaps = 1/22 (4%)
Query: 24 EDVDELSFDVGEIIRVVEYDDP 45
ED +EL+F GEII V++ DP
Sbjct: 13 ED-NELTFKAGEIITVLDDSDP 33
>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 = 23.8 bits (52), Expect = 4.8
Identities = 10/32 (31%), Positives = 15/32 (46%), Gaps = 1/32 (3%)
Query: 18 TYKYT-REDVDELSFDVGEIIRVVEYDDPEEQ 48
Y +T ELS G+I+ V+ DP +
Sbjct: 5 LYDFTPENPEMELSLKKGDIVAVLSKTDPLGR 36
>gnl|CDD|212714 cd11780, SH3_Sorbs_3, Third (or C-terminal) Src Homology 3 domain
of Sorbin and SH3 domain containing (Sorbs) proteins
and similar domains. This family, also called the
vinexin family, is composed predominantly of adaptor
proteins containing one sorbin homology (SoHo) and
three SH3 domains. Members include the third SH3
domains of Sorbs1 (or ponsin), Sorbs2 (or ArgBP2),
Vinexin (or Sorbs3), and similar domains. They are
involved in the regulation of cytoskeletal
organization, cell adhesion, and growth factor
signaling. Members of this family bind multiple
partners including signaling molecules like c-Abl,
c-Arg, Sos, and c-Cbl, as well as cytoskeletal
molecules such as vinculin and afadin. They may have
overlapping functions. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 55
Score = 23.8 bits (52), Expect = 4.8
Identities = 10/23 (43%), Positives = 15/23 (65%)
Query: 19 YKYTREDVDELSFDVGEIIRVVE 41
Y YT ++ DEL G+I+ V+E
Sbjct: 6 YSYTPQNEDELELREGDIVYVME 28
>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 = 23.5 bits (51), Expect = 5.0
Identities = 13/26 (50%), Positives = 14/26 (53%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDD 44
Y YT DELS G+II V E D
Sbjct: 6 YSYTANREDELSLQPGDIIEVHEKQD 31
>gnl|CDD|212736 cd11802, SH3_Endophilin_B, Src homology 3 domain of Endophilin-B.
Endophilins play roles in synaptic vesicle formation,
virus budding, mitochondrial morphology maintenance,
receptor-mediated endocytosis inhibition, and endosomal
sorting. They are classified into two types, A and B.
Vertebrates contain two endophilin-B isoforms.
Endophilin-B proteins are cytoplasmic proteins
expressed mainly in the heart, placenta, and skeletal
muscle. Endophilins contain an N-terminal N-BAR domain
(BAR domain with an additional N-terminal amphipathic
helix), followed by a variable region containing
proline clusters, and a C-terminal SH3 domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 23.4 bits (51), Expect = 5.2
Identities = 12/29 (41%), Positives = 14/29 (48%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPEE 47
Y Y ED ELS E+I V E +E
Sbjct: 6 YDYDAEDSTELSLLADEVITVYELPGMDE 34
>gnl|CDD|237493 PRK13762, PRK13762, tRNA-modifying enzyme; Provisional.
Length = 322
Score = 24.5 bits (54), Expect = 5.3
Identities = 11/24 (45%), Positives = 16/24 (66%)
Query: 29 LSFDVGEIIRVVEYDDPEEQVDKI 52
L DVG ++ E+DDPEE V++
Sbjct: 79 LEEDVGLELKEPEWDDPEEIVEES 102
>gnl|CDD|212759 cd11825, SH3_PLCgamma, Src homology 3 domain of Phospholipase C
(PLC) gamma. PLC catalyzes the hydrolysis of
phosphatidylinositol (4,5)-bisphosphate [PtdIns(4,5)P2]
to produce Ins(1,4,5)P3 and diacylglycerol (DAG) in
response to various receptors. Ins(1,4,5)P3 initiates
the calcium signaling cascade while DAG functions as an
activator of PKC. PLCgamma catalyzes this reaction in
tyrosine kinase-dependent signaling pathways. It is
activated and recruited to its substrate at the
membrane. Vertebrates contain two forms of PLCgamma,
PLCgamma1, which is widely expressed, and PLCgamma2,
which is primarily found in haematopoietic cells.
PLCgamma contains a Pleckstrin homology (PH) domain
followed by an elongation factor (EF) domain, two
catalytic regions of PLC domains that flank two tandem
SH2 domains, followed by a SH3 domain and C2 domain.
The SH3 domain of PLCgamma1 directly interacts with
dynamin-1 and can serve as a guanine nucleotide
exchange factor (GEF). It also interacts with Cbl,
inhibiting its phosphorylation and activity. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 23.4 bits (51), Expect = 5.4
Identities = 12/28 (42%), Positives = 15/28 (53%), Gaps = 2/28 (7%)
Query: 17 FTYKYTREDVDELSFDVGEIIRVVEYDD 44
+ Y+ R D ELSF II VE +D
Sbjct: 6 YDYRAQRPD--ELSFCKHAIITNVEKED 31
>gnl|CDD|212897 cd11964, SH3_STAM1, Src homology 3 domain of Signal Transducing
Adaptor Molecule 1. STAM1 is part of the endosomal
sorting complex required for transport (ESCRT-0) and is
involved in sorting ubiquitinated cargo proteins from
the endosome. It may also be involved in the regulation
of IL2 and GM-CSF mediated signaling, and has been
implicated in neural cell survival. STAMs were
discovered as proteins that are highly phosphorylated
following cytokine and growth factor stimulation. They
function in cytokine signaling and surface receptor
degradation, as well as regulate Golgi morphology. They
associate with many proteins including Jak2 and Jak3
tyrosine kinases, Hrs, AMSH, and UBPY. STAM adaptor
proteins contain VHS (Vps27, Hrs, STAM homology),
ubiquitin interacting (UIM), and SH3 domains. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 23.8 bits (51), Expect = 5.7
Identities = 9/27 (33%), Positives = 17/27 (62%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDP 45
Y + + +EL+F G+II +++ DP
Sbjct: 7 YDFEAAEDNELTFKAGDIITILDDSDP 33
>gnl|CDD|223273 COG0195, NusA, Transcription elongation factor [Transcription].
Length = 190
Score = 24.1 bits (53), Expect = 6.4
Identities = 11/30 (36%), Positives = 18/30 (60%), Gaps = 1/30 (3%)
Query: 26 VDELSFDVGEIIRVVEY-DDPEEQVDKIFS 54
V +S ++GE I VVE+ +DP E + +
Sbjct: 98 VKAVSEELGEKIDVVEWSEDPAEFIKNALA 127
>gnl|CDD|235154 PRK03739, PRK03739, 2-isopropylmalate synthase; Validated.
Length = 552
Score = 24.4 bits (54), Expect = 6.7
Identities = 18/42 (42%), Positives = 22/42 (52%), Gaps = 12/42 (28%)
Query: 3 DVILSALNLIRLLYFTYKYTREDVD-ELSF-DVGEIIRVVEY 42
D++ ALNL YT+ VD L F D+ EI R VEY
Sbjct: 282 DLVTLALNL---------YTQ-GVDPGLDFSDIDEIRRTVEY 313
>gnl|CDD|212731 cd11797, SH3_DNMBP_N4, Fourth N-terminal Src homology 3 domain of
Dynamin Binding Protein, also called Tuba. DNMBP or
Tuba is a cdc42-specific guanine nucleotide exchange
factor (GEF) that contains four N-terminal SH3 domains,
a central RhoGEF [or Dbl homology (DH)] domain followed
by a Bin/Amphiphysin/Rvs (BAR) domain, and two
C-terminal SH3 domains. It provides a functional link
between dynamin and key regulatory proteins of the
actin cytoskeleton. It plays an important role in
regulating cell junction configuration. The four
N-terminal SH3 domains of DNMBP bind the GTPase
dynamin, which plays an important role in the fission
of endocytic vesicles. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 50
Score = 23.2 bits (50), Expect = 6.9
Identities = 8/22 (36%), Positives = 16/22 (72%)
Query: 19 YKYTREDVDELSFDVGEIIRVV 40
Y++ + +EL F+VG+ IR++
Sbjct: 6 YRFQALEPNELDFEVGDRIRII 27
>gnl|CDD|212747 cd11813, SH3_SGSM3, Src Homology 3 domain of Small G protein
Signaling Modulator 3. SGSM3 is also called
Merlin-associated protein (MAP), RUN and SH3
domain-containing protein (RUSC3), RUN and TBC1
domain-containing protein 3 (RUTBC3), Rab
GTPase-activating protein 5 (RabGAP5), or Rab GAP-like
protein (RabGAPLP). It is expressed ubiquitously and
functions as a regulator of small G protein RAP- and
RAB-mediated neuronal signaling. It is involved in
modulating NGF-mediated neurite outgrowth and
differentiation. It also interacts with the tumor
suppressor merlin and may play a role in the
merlin-associated suppression of cell growth. SGSM3
contains TBC, SH3, and RUN domains. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 53
Score = 23.2 bits (50), Expect = 7.2
Identities = 12/36 (33%), Positives = 18/36 (50%)
Query: 21 YTREDVDELSFDVGEIIRVVEYDDPEEQVDKIFSLR 56
+ R D DEL F +II ++ D V ++ LR
Sbjct: 8 FERHDDDELGFRKNDIITIISQKDEHCWVGELNGLR 43
>gnl|CDD|212827 cd11894, SH3_FCHSD2_2, Second Src Homology 3 domain of FCH and
double SH3 domains protein 2. FCHSD2 has a domain
structure consisting of an N-terminal F-BAR (FES-CIP4
Homology and Bin/Amphiphysin/Rvs), two SH3, and
C-terminal proline-rich domains. It has only been
characterized in silico and its function is unknown.
SH3 domains are protein interaction domains that bind
to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 56
Score = 23.0 bits (49), Expect = 9.2
Identities = 11/29 (37%), Positives = 18/29 (62%)
Query: 19 YKYTREDVDELSFDVGEIIRVVEYDDPEE 47
Y Y + DELSF G IIR++ ++ ++
Sbjct: 6 YDYEGQTDDELSFPEGAIIRILNKENQDD 34
>gnl|CDD|212868 cd11935, SH3_Nebulette_C, C-terminal Src Homology 3 domain of
Nebulette and LIM-nebulette (or Lasp2). Nebulette is a
cardiac-specific protein that localizes to the Z-disc.
It interacts with tropomyosin and is important in
stabilizing actin thin filaments in cardiac muscles.
Polymorphisms in the nebulette gene are associated with
dilated cardiomyopathy, with some mutations resulting
in severe heart failure. Nebulette is a 107kD protein
that contains an N-terminal acidic region, multiple
nebulin repeats, and a C-terminal SH3 domain.
LIM-nebulette, also called Lasp2 (LIM and SH3 domain
protein 2), is an alternatively spliced variant of
nebulette. Although it shares a gene with nebulette,
Lasp2 is not transcribed from a muscle-specific
promoter, giving rise to its multiple tissue expression
pattern with highest amounts in the brain. It can
crosslink actin filaments and it affects cell
spreading. Lasp2 is a 34kD protein containing an
N-terminal LIM domain, three nebulin repeats, and a
C-terminal SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 58
Score = 23.0 bits (49), Expect = 9.8
Identities = 10/23 (43%), Positives = 15/23 (65%)
Query: 19 YKYTREDVDELSFDVGEIIRVVE 41
Y Y+ +D DE+SF G+ I V+
Sbjct: 7 YDYSAQDEDEVSFRDGDYIVNVQ 29
Database: CDD.v3.10
Posted date: Mar 20, 2013 7:55 AM
Number of letters in database: 10,937,602
Number of sequences in database: 44,354
Lambda K H
0.323 0.143 0.420
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: 3,912,070
Number of extensions: 319129
Number of successful extensions: 625
Number of sequences better than 10.0: 1
Number of HSP's gapped: 625
Number of HSP's successfully gapped: 111
Length of query: 72
Length of database: 10,937,602
Length adjustment: 42
Effective length of query: 30
Effective length of database: 9,074,734
Effective search space: 272242020
Effective search space used: 272242020
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.5 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.9 bits)
S2: 53 (24.0 bits)