RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy11360
(940 letters)
>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 = 122 bits (307), Expect = 2e-33
Identities = 50/53 (94%), Positives = 53/53 (100%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
RAKALLDFERHDDDELGFRKND+ITIISQKDEHCW+GELNGL+GWFPAKFVEL
Sbjct: 1 RAKALLDFERHDDDELGFRKNDIITIISQKDEHCWVGELNGLRGWFPAKFVEL 53
>gnl|CDD|217217 pfam02759, RUN, RUN domain. This domain is present in several
proteins that are linked to the functions of GTPases in
the Rap and Rab families. They could hence play
important roles in multiple Ras-like GTPase signalling
pathways. The domain is comprises six conserved regions,
which in some proteins have considerable insertions
between them. The domain core is thought to take up a
predominantly alpha fold, with basic amino acids in
regions A and D possibly playing a functional role in
interactions with Ras GTPases.
Length = 128
Score = 115 bits (290), Expect = 3e-30
Identities = 55/155 (35%), Positives = 78/155 (50%), Gaps = 28/155 (18%)
Query: 619 TLCPALKQILSCGLKRRALGEVCHPWLFIEEVATREVEKDFTSVYSRLLLCKTYRLDEDG 678
+LCPAL+ +LS GLKRR+L A E+ F S+ R+ G
Sbjct: 1 SLCPALEALLSHGLKRRSLD-----------AAGLLRERSFWSLLERV-----------G 38
Query: 679 KVLTPEELLYRCVQAVNQSHDMAHVQMDVKFRSLICLGLNEQVLHLWLEVLCSCEPVVLK 738
K++ P E L R VQ + Q H D +FR+ I L LNE+VL WL +L S + ++ K
Sbjct: 39 KLVPPAEELIRSVQELPQIHTP-----DGRFRAWIRLALNEKVLESWLSLLLSNKELLSK 93
Query: 739 WYHPWSFISSPGWVQV-KCDLRVLSQFPFNLSPDW 772
+Y PW+ + P +V + L LS FNL D+
Sbjct: 94 YYEPWALLRDPEFVSILLGLLVGLSALDFNLDLDF 128
Score = 99.2 bits (248), Expect = 2e-24
Identities = 42/125 (33%), Positives = 61/125 (48%), Gaps = 17/125 (13%)
Query: 787 GVATREVEKDFTSVYSRLLLCKTYRLDEDGKVLTPEELLYRCVQAVNQSHDMAHVQMDVK 846
A E+ F S+ R+ GK++ P E L R VQ + Q H D +
Sbjct: 20 DAAGLLRERSFWSLLERV-----------GKLVPPAEELIRSVQELPQIHTP-----DGR 63
Query: 847 FRSLICLGLNEQVLHLWLEVLCSCEPVVLKWYHPWSFISSPGWVQV-KCDLRVLSQFPFN 905
FR+ I L LNE+VL WL +L S + ++ K+Y PW+ + P +V + L LS FN
Sbjct: 64 FRAWIRLALNEKVLESWLSLLLSNKELLSKYYEPWALLRDPEFVSILLGLLVGLSALDFN 123
Query: 906 LSPDW 910
L D+
Sbjct: 124 LDLDF 128
>gnl|CDD|214540 smart00164, TBC, Domain in Tre-2, BUB2p, and Cdc16p. Probable
Rab-GAPs. Widespread domain present in Gyp6 and Gyp7,
thereby giving rise to the notion that it performs a
GTP-activator activity on Rab-like GTPases.
Length = 216
Score = 115 bits (291), Expect = 4e-29
Identities = 70/227 (30%), Positives = 99/227 (43%), Gaps = 32/227 (14%)
Query: 140 TRQGIPHSLRPQLWLRLSGALEKK-ALSKIKYQDIVKASSSDALAFAKQIEKDLLRTMPT 198
R+G+P SLR +W L A + K Y ++K ++ D + QIEKDL RT P
Sbjct: 1 VRKGVPPSLRGVVWKLLLNAQPMDTSADKDLYSRLLKETAPDDKSIVHQIEKDLRRTFPE 60
Query: 199 NACFSTFSSTGVPRLRRILRALAWLFPDIGGVVNALDFGSRGWWFESKRKVKRQKSILQN 258
++ F G LRR+L+A A P++ G ++F +
Sbjct: 61 HSFFQDKEGPGQESLRRVLKAYALYNPEV-GYCQGMNF------------------LAAP 101
Query: 259 LI--FGEEEN--------GEDIKTK--NIHQTGIQADQKVLRSLVASGLPQLEVSLLQHD 306
L+ +EE+ E +G+Q D L LV P L L
Sbjct: 102 LLLVMEDEEDAFWCLVKLMERYGPNFYLPDMSGLQLDLLQLDRLVKEYDPDLYKHLKDLG 161
Query: 307 IELSLITLHWFLTLFASVVHFKILLRIWDLLFLDGSIVLFHSCEPVL 353
I SL L WFLTLFA + +I+LRIWD+LF +GS LF +L
Sbjct: 162 ITPSLYALRWFLTLFARELPLEIVLRIWDVLFAEGSDFLFRVALALL 208
>gnl|CDD|215997 pfam00566, RabGAP-TBC, Rab-GTPase-TBC domain. Identification of a
TBC domain in GYP6_YEAST and GYP7_YEAST, which are
GTPase activator proteins of yeast Ypt6 and Ypt7,
implies that these domains are GTPase activator proteins
of Rab-like small GTPases.
Length = 206
Score = 102 bits (255), Expect = 1e-24
Identities = 59/218 (27%), Positives = 87/218 (39%), Gaps = 38/218 (17%)
Query: 146 HSLRPQLWLRLSGALEKKALSKIKYQDIVKASSSDALAFAKQIEKDLLRTMPTNACFSTF 205
SLR ++W L G L + Q D +QIEKD+ RT P + F
Sbjct: 1 DSLRGEVWKLLLGNLSESKQRDSVSQYSKLLKLED-SPDEEQIEKDVPRTFPHHFFFK-- 57
Query: 206 SSTGVPRLRRILRALAWLFPDIGGVVNALDFGSRGWWFESKRKVKRQKSILQNLI--FGE 263
+ G +LRRIL+A + PD+G ++F I L+ +
Sbjct: 58 NGEGQQQLRRILKAYSIYNPDVG-YCQGMNF------------------IAAPLLLVVLD 98
Query: 264 EENGE---------DIKTKNIHQT---GIQADQKVLRSLVASGLPQLEVSLLQHDIELSL 311
EE E + ++ G+Q D V L+ P+L L + ++ SL
Sbjct: 99 EE--EAFWCFVSLLEYLLRDFFLPSFPGLQRDLYVFEELLKKHDPELYKHLQKLGLDPSL 156
Query: 312 ITLHWFLTLFASVVHFKILLRIWDLLFLDGSIVLFHSC 349
WFLTLFA + + +LR+WDL G LF
Sbjct: 157 FASKWFLTLFARELPLETVLRLWDLFLEGGKFFLFRVA 194
>gnl|CDD|227535 COG5210, COG5210, GTPase-activating protein [General function
prediction only].
Length = 496
Score = 106 bits (266), Expect = 6e-24
Identities = 68/222 (30%), Positives = 99/222 (44%), Gaps = 9/222 (4%)
Query: 130 ISRTDKLRSMTRQGIPHSLRPQLWLRLSGALEKKALSKIKYQDI---VKASSSDALAFAK 186
+ KLR + R+GIP+ LR +W L G + Y+ + + +
Sbjct: 199 PVQLSKLRELIRKGIPNELRGDVWEFLLGIGFDLDKNPGLYERLLNLHREAKIPTQEIIS 258
Query: 187 QIEKDLLRTMPTNACFSTFSSTGVPRLRRILRALAWLFPDIGGVVNALDFGSRGWWFESK 246
QIEKDL RT P N+ F T S LRR+L+A + P++ G V ++F +
Sbjct: 259 QIEKDLSRTFPDNSLFQTEISIRAENLRRVLKAYSLYNPEV-GYVQGMNFLAAP--LLLV 315
Query: 247 RKVKRQKSILQNLIFGEEENGEDIKTKNIHQTGIQADQKVLRSLVASGLPQLEVSLLQHD 306
+ + Q + KN+ G+ D KVL LV P+L LL+
Sbjct: 316 LESEEQAFWCLVKLLKNYGL-PGYFLKNLS--GLHRDLKVLDDLVEELDPELYEHLLREG 372
Query: 307 IELSLITLHWFLTLFASVVHFKILLRIWDLLFLDGSIVLFHS 348
+ L + WFLTLF + LRIWD LFL+GS +LF
Sbjct: 373 VVLLMFAFRWFLTLFVREFPLEYALRIWDCLFLEGSSMLFQL 414
>gnl|CDD|214736 smart00593, RUN, domain involved in Ras-like GTPase signaling.
Length = 64
Score = 71.5 bits (176), Expect = 1e-15
Identities = 26/62 (41%), Positives = 36/62 (58%), Gaps = 1/62 (1%)
Query: 709 FRSLICLGLNEQVLHLWLEVLCSCEPVVLKWYHPWSFISSP-GWVQVKCDLRVLSQFPFN 767
FR+ I L LNE++L WL +L S E ++ K+Y PW+F+ P Q+ L LS FN
Sbjct: 1 FRAWIRLALNEKLLSSWLNLLLSDEELLSKYYEPWAFLRDPEEGEQLLGLLVGLSALDFN 60
Query: 768 LS 769
L
Sbjct: 61 LP 62
Score = 71.5 bits (176), Expect = 1e-15
Identities = 26/62 (41%), Positives = 36/62 (58%), Gaps = 1/62 (1%)
Query: 847 FRSLICLGLNEQVLHLWLEVLCSCEPVVLKWYHPWSFISSP-GWVQVKCDLRVLSQFPFN 905
FR+ I L LNE++L WL +L S E ++ K+Y PW+F+ P Q+ L LS FN
Sbjct: 1 FRAWIRLALNEKLLSSWLNLLLSDEELLSKYYEPWAFLRDPEEGEQLLGLLVGLSALDFN 60
Query: 906 LS 907
L
Sbjct: 61 LP 62
>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 = 69.9 bits (172), Expect = 4e-15
Identities = 22/54 (40%), Positives = 34/54 (62%), Gaps = 1/54 (1%)
Query: 539 RRAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELN-GLKGWFPAKFVE 591
+ +AL D+ D DEL F+K D+IT++ + D+ W G L G +G FP+ +VE
Sbjct: 3 PQVRALYDYTAQDPDELSFKKGDIITVLEKSDDGWWKGRLGRGKEGLFPSNYVE 56
>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 = 65.2 bits (160), Expect = 2e-13
Identities = 26/51 (50%), Positives = 36/51 (70%), Gaps = 1/51 (1%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLK-GWFPAKF 589
A+AL D+E DDDEL F+K D+IT++ + D+ W GELNG + G FPA +
Sbjct: 1 YARALYDYEAQDDDELSFKKGDIITVLEKDDDGWWEGELNGGREGLFPANY 51
>gnl|CDD|212737 cd11803, SH3_Endophilin_A, Src homology 3 domain of Endophilin-A.
Endophilins play roles in synaptic vesicle formation,
virus budding, mitochondrial morphology maintenance,
receptor-mediated endocytosis inhibition, and endosomal
sorting. They are classified into two types, A and B.
Vertebrates contain three endophilin-A isoforms (A1, A2,
and A3). Endophilin-A proteins are enriched in the brain
and play multiple roles in receptor-mediated
endocytosis. They tubulate membranes and regulate
calcium influx into neurons to trigger the activation of
the endocytic machinery. They are also involved in the
sorting of plasma membrane proteins, actin filament
assembly, and the uncoating of clathrin-coated vesicles
for fusion with endosomes. Endophilins contain an
N-terminal N-BAR domain (BAR domain with an additional
N-terminal amphipathic helix), followed by a variable
region containing proline clusters, and a C-terminal SH3
domain. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 63.0 bits (154), Expect = 1e-12
Identities = 24/53 (45%), Positives = 38/53 (71%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVELL 593
+AL DFE ++ ELGF++ D+IT+ +Q DE+ + G +NG G+FP +VE+L
Sbjct: 3 CRALYDFEPENEGELGFKEGDIITLTNQIDENWYEGMVNGQSGFFPVNYVEVL 55
>gnl|CDD|212753 cd11819, SH3_Cortactin_like, Src homology 3 domain of Cortactin and
related proteins. This subfamily includes cortactin,
Abp1 (actin-binding protein 1), hematopoietic lineage
cell-specific protein 1 (HS1), and similar proteins.
These proteins are involved in regulating actin dynamics
through direct or indirect interaction with the Arp2/3
complex, which is required to initiate actin
polymerization. They all contain at least one C-terminal
SH3 domain. Cortactin and HS1 bind Arp2/3 and actin
through an N-terminal region that contains an acidic
domain and several copies of a repeat domain found in
cortactin and HS1. Abp1 binds actin via an N-terminal
actin-depolymerizing factor (ADF) homology domain. Yeast
Abp1 binds Arp2/3 directly through two acidic domains.
Mammalian Abp1 does not directly interact with Arp2/3;
instead, it regulates actin dynamics indirectly by
interacting with dynamin and WASP family proteins. The
C-terminal region of these proteins acts as an adaptor
or scaffold that can connect membrane trafficking and
signaling proteins that bind the SH3 domain within the
actin network. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 61.9 bits (151), Expect = 2e-12
Identities = 27/54 (50%), Positives = 36/54 (66%), Gaps = 1/54 (1%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELN-GLKGWFPAKFVEL 592
RAKAL D++ +D+E+ F + D+IT I Q DE W+G G KG FPA +VEL
Sbjct: 1 RAKALYDYQAAEDNEISFVEGDIITQIEQIDEGWWLGVNAKGQKGLFPANYVEL 54
>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 = 61.9 bits (151), Expect = 3e-12
Identities = 23/52 (44%), Positives = 31/52 (59%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
R +AL DF + EL FR+ D+IT++ D W GEL G G FPA +V+
Sbjct: 1 RVQALYDFNPQEPGELEFRRGDIITVLDSSDPDWWKGELRGRVGIFPANYVQ 52
>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 = 61.6 bits (150), Expect = 4e-12
Identities = 21/52 (40%), Positives = 31/52 (59%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
+A +FE ++DEL F K D+IT+ + W G LNG GWFP+ +V+
Sbjct: 2 VRAKFNFEGTNEDELSFDKGDIITVTQVVEGGWWEGTLNGKTGWFPSNYVKE 53
>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 = 59.9 bits (146), Expect = 1e-11
Identities = 18/47 (38%), Positives = 27/47 (57%), Gaps = 1/47 (2%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLK-GWFPA 587
AL D+ + DEL F+K D+I ++ + D+ W G L G K G P+
Sbjct: 1 VALYDYTAREPDELSFKKGDIIIVLEKSDDGWWKGRLKGGKEGLIPS 47
>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 = 59.4 bits (144), Expect = 2e-11
Identities = 21/53 (39%), Positives = 33/53 (62%), Gaps = 1/53 (1%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWI-GELNGLKGWFPAKFVE 591
+AL D+E + DEL F+ D++T + ++DE W G L+G G +PA +VE
Sbjct: 1 PVRALYDYEGQESDELSFKAGDILTKLEEEDEQGWCKGRLDGRVGLYPANYVE 53
>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 = 58.2 bits (141), Expect = 6e-11
Identities = 25/53 (47%), Positives = 31/53 (58%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
A AL D++ DDDE+ F +D+IT I DE W G G G FPA +VEL
Sbjct: 1 TAVALYDYQAADDDEISFDPDDIITNIEMIDEGWWRGVCRGKYGLFPANYVEL 53
>gnl|CDD|212754 cd11820, SH3_STAM, Src homology 3 domain of Signal Transducing
Adaptor Molecules. STAMs were discovered as proteins
that are highly phosphorylated following cytokine and
growth factor stimulation. They function in cytokine
signaling and surface receptor degradation, as well as
regulate Golgi morphology. They associate with many
proteins including Jak2 and Jak3 tyrosine kinases, Hrs,
AMSH, and UBPY. STAM adaptor proteins contain VHS
(Vps27, Hrs, STAM homology), ubiquitin interacting
(UIM), and SH3 domains. There are two vertebrate STAMs,
STAM1 and STAM2, which may be functionally redundant;
vertebrate STAMs contain ITAM motifs. They are part of
the endosomal sorting complex required for transport
(ESCRT-0). STAM2 deficiency in mice did not cause any
obvious abnormality, while STAM1 deficiency resulted in
growth retardation. Loss of both STAM1 and STAM2 in mice
proved lethal, indicating that STAMs are important for
embryonic development. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 57.1 bits (138), Expect = 1e-10
Identities = 21/52 (40%), Positives = 33/52 (63%)
Query: 539 RRAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
R+ +AL DFE +D+EL F+ ++IT++ D + W G + +G FPA FV
Sbjct: 1 RKVRALYDFEAAEDNELTFKAGEIITVLDDSDPNWWKGSNHRGEGLFPANFV 52
>gnl|CDD|212806 cd11873, SH3_CD2AP-like_1, First Src Homology 3 domain (SH3A) of
CD2-associated protein and similar proteins. This
subfamily is composed of the first SH3 domain (SH3A) of
CD2AP, CIN85 (Cbl-interacting protein of 85 kDa), and
similar domains. CD2AP and CIN85 are adaptor proteins
that bind to protein partners and assemble complexes
that have been implicated in T cell activation, kidney
function, and apoptosis of neuronal cells. They also
associate with endocytic proteins, actin cytoskeleton
components, and other adaptor proteins involved in
receptor tyrosine kinase (RTK) signaling. CD2AP and the
main isoform of CIN85 contain three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CD2AP and CIN85 to
bind various protein partners and assemble complexes
that have been implicated in many different functions.
SH3A of both proteins bind to an atypical PXXXPR motif
at the C-terminus of Cbl and the cytoplasmic domain of
the cell adhesion protein CD2. CIN85 SH3A binds to
internal proline-rich motifs within the proline-rich
region; this intramolecular interaction serves as a
regulatory mechanism to keep CIN85 in a closed
conformation, preventing the recruitment of other
proteins. CIN85 SH3A has also been shown to bind
ubiquitin. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 56.5 bits (137), Expect = 2e-10
Identities = 18/51 (35%), Positives = 28/51 (54%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
D++ + DEL + D+IT + + +E W G LNG +G FP FV+
Sbjct: 2 VIVEFDYDAEEPDELTLKVGDIITNVKKMEEGWWEGTLNGKRGMFPDNFVK 52
>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 = 55.9 bits (135), Expect = 4e-10
Identities = 22/50 (44%), Positives = 32/50 (64%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
AL + ++DEL F+K D+I ++S+ D W GELNG G FP+ +VE
Sbjct: 4 ALFPYTAQNEDELSFQKGDIINVLSKDDPDWWRGELNGQTGLFPSNYVEP 53
>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 = 55.8 bits (135), Expect = 4e-10
Identities = 23/52 (44%), Positives = 34/52 (65%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
R KAL + + +DEL + D+I + ++D+ W+GELNG KG FPA +VE
Sbjct: 1 RCKALYSYTANREDELSLQPGDIIEVHEKQDDGWWLGELNGKKGIFPATYVE 52
>gnl|CDD|213018 cd12142, SH3_D21-like, Src Homology 3 domain of SH3
domain-containing protein 21 (SH3D21) and similar
proteins. N-terminal SH3 domain of the uncharacterized
protein SH3 domain-containing protein 21, and similar
uncharacterized domains, it belongs to the CD2AP-like_3
subfamily of proteins. The CD2AP-like_3 subfamily is
composed of the third SH3 domain (SH3C) of CD2AP, CIN85
(Cbl-interacting protein of 85 kDa), and similar
domains. CD2AP and CIN85 are adaptor proteins that bind
to protein partners and assemble complexes that have
been implicated in T cell activation, kidney function,
and apoptosis of neuronal cells. They also associate
with endocytic proteins, actin cytoskeleton components,
and other adaptor proteins involved in receptor tyrosine
kinase (RTK) signaling. CD2AP and the main isoform of
CIN85 contain three SH3 domains, a proline-rich region,
and a C-terminal coiled-coil domain. All of these
domains enable CD2AP and CIN85 to bind various protein
partners and assemble complexes that have been
implicated in many different functions. SH3C of both
proteins have been shown to bind to ubiquitin. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 55.9 bits (135), Expect = 4e-10
Identities = 24/53 (45%), Positives = 32/53 (60%), Gaps = 2/53 (3%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQ--KDEHCWIGELNGLKGWFPAKFVEL 592
+ L D+ DEL +K DVI +IS+ +DE W GELNG +G+FP FV
Sbjct: 3 RVLFDYNPVAPDELALKKGDVIEVISKETEDEGWWEGELNGRRGFFPDNFVMP 55
>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 = 55.8 bits (135), Expect = 4e-10
Identities = 25/55 (45%), Positives = 37/55 (67%), Gaps = 2/55 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQK--DEHCWIGELNGLKGWFPAKFVEL 592
+A+ L D+E ++DEL R+ D++TI+S+ D+ W GELNG +G FP FVE
Sbjct: 1 KARVLFDYEAENEDELTLREGDIVTILSKDCEDKGWWKGELNGKRGVFPDNFVEP 55
>gnl|CDD|212882 cd11949, SH3_GRB2_C, C-terminal Src homology 3 domain of Growth
factor receptor-bound protein 2. GRB2 is a critical
signaling molecule that regulates the Ras pathway by
linking tyrosine kinases to the Ras guanine nucleotide
releasing protein Sos (son of sevenless), which converts
Ras to the active GTP-bound state. It is ubiquitously
expressed in all tissues throughout development and is
important in cell cycle progression, motility,
morphogenesis, and angiogenesis. In lymphocytes, GRB2 is
associated with antigen receptor signaling components.
GRB2 contains an N-terminal SH3 domain, a central SH2
domain, and a C-terminal SH3 domain. The C-terminal SH3
domain of GRB2 binds to Gab2 (Grb2-associated binder 2)
through epitopes containing RxxK motifs, as well as to
the proline-rich C-terminus of FGRF2. SH3 domains are
protein interaction domains that typically bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 54.5 bits (131), Expect = 1e-09
Identities = 20/51 (39%), Positives = 29/51 (56%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
+AL DF+ +D ELGFR+ D I ++ D + W G +G G FP +V
Sbjct: 2 VQALFDFDPQEDGELGFRRGDFIEVMDNSDPNWWKGACHGQTGMFPRNYVT 52
>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 = 54.3 bits (131), Expect = 1e-09
Identities = 26/54 (48%), Positives = 33/54 (61%), Gaps = 1/54 (1%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIG-ELNGLKGWFPAKFVEL 592
RA+AL D++ DD E+ F D+IT I Q DE W G +G G FPA +VEL
Sbjct: 1 RARALYDYQAADDTEISFDPGDIITDIEQIDEGWWRGTGPDGTYGLFPANYVEL 54
>gnl|CDD|212776 cd11842, SH3_Ysc84p_like, Src homology 3 domain of Ysc84p and
similar fungal proteins. This family is composed of the
Saccharomyces cerevisiae proteins, Ysc84p (also called
LAS17-binding protein 4, Lsb4p) and Lsb3p, and similar
fungal proteins. They contain an N-terminal SYLF domain
(also called DUF500) and a C-terminal SH3 domain. Ysc84p
localizes to actin patches and plays an important in
actin polymerization during endocytosis. The N-terminal
domain of both Ysc84p and Lsb3p can bind and bundle
actin filaments. A study of the yeast SH3 domain
interactome predicts that the SH3 domains of Lsb3p and
Lsb4p may function as molecular hubs for the assembly of
endocytic complexes. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 54.0 bits (130), Expect = 2e-09
Identities = 23/55 (41%), Positives = 32/55 (58%), Gaps = 2/55 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEH--CWIGELNGLKGWFPAKFVEL 592
+A AL DF +L F+K D+ITI+ + D W G + G +G FPA +VEL
Sbjct: 1 KAVALYDFAGEQPGDLAFQKGDIITILKKSDSQNDWWTGRIGGREGIFPANYVEL 55
>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 = 53.6 bits (130), Expect = 2e-09
Identities = 16/52 (30%), Positives = 28/52 (53%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
+ + D+ D +EL +K DV+ ++ + D W GE G +G P+ +VE
Sbjct: 1 YGRVIFDYVATDPNELSLKKGDVVKVLDKDDNGWWEGERGGRRGLVPSSYVE 52
>gnl|CDD|212720 cd11786, SH3_SH3RF_1, First Src Homology 3 domain of SH3 domain
containing ring finger proteins. This model represents
the first SH3 domain of SH3RF1 (or POSH), SH3RF2 (or
POSHER), SH3RF3 (POSH2), and similar domains. Members of
this family are scaffold proteins that function as E3
ubiquitin-protein ligases. They all contain an
N-terminal RING finger domain and multiple SH3 domains;
SH3RF1 and SH3RF3 have four SH3 domains while SH3RF2 has
three. SH3RF1 plays a role in calcium homeostasis
through the control of the ubiquitin domain protein
Herp. It may also have a role in regulating death
receptor mediated and JNK mediated apoptosis. SH3RF3
interacts with p21-activated kinase 2 (PAK2) and
GTP-loaded Rac1. It may play a role in regulating JNK
mediated apoptosis in certain conditions. SH3RF2 acts as
an anti-apoptotic regulator of the JNK pathway by
binding to and promoting the degradation of SH3RF1. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 53.9 bits (130), Expect = 2e-09
Identities = 21/52 (40%), Positives = 35/52 (67%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
AKAL ++E + +L F+K D+I + + DE+ + GE NG +G+FPA +V+
Sbjct: 1 CAKALYNYEGKEPGDLSFKKGDIILLRKRIDENWYHGECNGKQGFFPASYVQ 52
>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 = 53.3 bits (128), Expect = 3e-09
Identities = 21/49 (42%), Positives = 28/49 (57%), Gaps = 1/49 (2%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWI-GELNGLKGWFPAKF 589
+AL D+E DDE+ R D I +I D W GE+NG+KG FP +
Sbjct: 3 EALYDYEAQGDDEISIRVGDRIAVIRGDDGSGWTYGEINGVKGLFPTSY 51
>gnl|CDD|212862 cd11929, SH3_SH3RF2_1, First Src Homology 3 domain of SH3 domain
containing ring finger 2. SH3RF2 is also called POSHER
(POSH-eliminating RING protein) or HEPP1 (heart protein
phosphatase 1-binding protein). It acts as an
anti-apoptotic regulator of the JNK pathway by binding
to and promoting the degradation of SH3RF1 (or POSH), a
scaffold protein that is required for pro-apoptotic JNK
activation. It may also play a role in cardiac functions
together with protein phosphatase 1. SH3RF2 contains an
N-terminal RING finger domain and three SH3 domains.
This model represents the first SH3 domain, located at
the N-terminal half, of SH3RF2. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 53.0 bits (127), Expect = 3e-09
Identities = 25/53 (47%), Positives = 36/53 (67%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
RAKAL ++ H+ +L F K DVI + Q DE+ ++GE+NG+ G FPA VE+
Sbjct: 2 RAKALCNYRGHNPGDLKFNKGDVILLRRQLDENWYLGEINGVSGIFPASSVEV 54
>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 = 52.8 bits (127), Expect = 4e-09
Identities = 20/52 (38%), Positives = 29/52 (55%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
+ KAL ++ D DEL F + D+I I+ + W G L G +G FP +VE
Sbjct: 1 QCKALYAYDAQDTDELSFNEGDIIEILKEDPSGWWTGRLRGKEGLFPGNYVE 52
>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 = 52.9 bits (127), Expect = 4e-09
Identities = 23/51 (45%), Positives = 30/51 (58%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
+AL DFE +DDELGF DVI ++ + W G L+G G FPA +V
Sbjct: 2 VRALYDFEALEDDELGFNSGDVIEVLDSSNPSWWKGRLHGKLGLFPANYVA 52
>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 = 52.9 bits (127), Expect = 4e-09
Identities = 24/53 (45%), Positives = 31/53 (58%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVELL 593
A AL D++ DDE+ F + IT I DE W G +G +G FPA +VELL
Sbjct: 3 AVALYDYQGEGDDEISFDPQETITDIEMVDEGWWKGTCHGHRGLFPANYVELL 55
>gnl|CDD|212894 cd11961, SH3_Abp1_fungi_C2, Second C-terminal Src homology 3 domain
of Fungal Actin-binding protein 1. Abp1 is an adaptor
protein that functions in receptor-mediated endocytosis
and vesicle trafficking. It contains an N-terminal
actin-binding module, the actin-depolymerizing factor
(ADF) homology domain, a central proline-rich region,
and a C-terminal SH3 domain (many yeast Abp1 proteins
contain two C-terminal SH3 domains). Yeast Abp1 also
contains two acidic domains that bind directly to the
Arp2/3 complex, which is required to initiate actin
polymerization. The SH3 domain of yeast Abp1 binds and
localizes the kinases, Ark1p and Prk1p, which facilitate
actin patch disassembly following vesicle
internalization. It also mediates the localization to
the actin patch of the synaptojanin-like protein, Sjl2p,
which plays a key role in endocytosis. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 53
Score = 52.9 bits (127), Expect = 5e-09
Identities = 24/52 (46%), Positives = 35/52 (67%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
AKAL D++ +D+EL F +ND I I D+ W+GE +G +G FP+ +VEL
Sbjct: 2 AKALYDYDAAEDNELSFFENDKIINIEFVDDDWWLGECHGSRGLFPSNYVEL 53
>gnl|CDD|212760 cd11826, SH3_Abi, Src homology 3 domain of Abl Interactor proteins.
Abl interactor (Abi) proteins are adaptor proteins
serving as binding partners and substrates of Abl
tyrosine kinases. They are involved in regulating actin
cytoskeletal reorganization and play important roles in
membrane-ruffling, endocytosis, cell motility, and cell
migration. They localize to sites of actin
polymerization in epithelial adherens junction and
immune synapses, as well as to the leading edge of
lamellipodia. Vertebrates contain two Abi proteins, Abi1
and Abi2. Abi1 displays a wide expression pattern while
Abi2 is highly expressed in the eye and brain. Abi
proteins contain a homeobox homology domain, a
proline-rich region, and a SH3 domain. The SH3 domain of
Abi binds to a PxxP motif in Abl. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 52
Score = 52.7 bits (127), Expect = 5e-09
Identities = 20/50 (40%), Positives = 30/50 (60%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
AL D+ DDEL F++ D+I + + D+ + G LNG+ G FP +VE
Sbjct: 3 VALYDYTADKDDELSFQEGDIIYVTKKNDDGWYEGVLNGVTGLFPGNYVE 52
>gnl|CDD|212990 cd12057, SH3_CIN85_3, Third Src Homology 3 domain (SH3C) of
Cbl-interacting protein of 85 kDa. CIN85, also called
SH3 domain-containing kinase-binding protein 1 (SH3KBP1)
or CD2-binding protein 3 (CD2BP3) or Ruk, is an adaptor
protein that is involved in the downregulation of
receptor tyrosine kinases by facilitating endocytosis
through interaction with endophilin-associated ubiquitin
ligase Cbl proteins. It is also important in many other
cellular processes including vesicle-mediated transport,
cytoskeletal remodelling, apoptosis, cell adhesion and
migration, and viral infection, among others. CIN85
exists as multiple variants from alternative splicing;
the main variant contains three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CIN85 to bind
various protein partners and assemble complexes that
have been implicated in many different functions. This
alignment model represents the third SH3 domain (SH3C)
of CIN85. SH3C has been shown to bind ubiquitin. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 56
Score = 53.0 bits (127), Expect = 5e-09
Identities = 24/54 (44%), Positives = 35/54 (64%), Gaps = 2/54 (3%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQK--DEHCWIGELNGLKGWFPAKFVELL 593
K L +E ++DEL ++ D++T+IS+ D W GELNG +G FP FV+LL
Sbjct: 3 KVLFPYEAQNEDELTIKEGDIVTLISKDCIDAGWWEGELNGRRGVFPDNFVKLL 56
>gnl|CDD|212923 cd11990, SH3_Intersectin2_2, Second Src homology 3 domain (or SH3B)
of Intersectin-2. Intersectin-2 (ITSN2) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN2 also functions as a specific GEF for Cdc42
activation in epithelial morphogenesis, and is required
in mitotic spindle orientation. It exists in
alternatively spliced short and long isoforms. The short
isoform contains two Eps15 homology domains (EH1 and
EH2), a coiled-coil region and five SH3 domains
(SH3A-E), while the long isoform, in addition, contains
RhoGEF (also called Dbl-homologous or DH), Pleckstrin
homology (PH) and C2 domains. The second SH3 domain (or
SH3B) of ITSN2 is expected to bind protein partners,
similar to ITSN1 which has been shown to bind WNK and
CdGAP. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 52.4 bits (125), Expect = 7e-09
Identities = 23/53 (43%), Positives = 37/53 (69%), Gaps = 1/53 (1%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
+A+AL + D+ L F KND+IT++ Q+ E+ W GE++G +GWFP +V+L
Sbjct: 1 KAQALCSWTAKKDNHLNFSKNDIITVLEQQ-ENWWFGEVHGGRGWFPKSYVKL 52
>gnl|CDD|212922 cd11989, SH3_Intersectin1_2, Second Src homology 3 domain (or SH3B)
of Intersectin-1. Intersectin-1 (ITSN1) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN1 localizes in membranous organelles, CCPs, the
Golgi complex, and may be involved in the cell membrane
trafficking system. It exists in alternatively spliced
short and long isoforms. The short isoform contains two
Eps15 homology domains (EH1 and EH2), a coiled-coil
region and five SH3 domains (SH3A-E), while the long
isoform, in addition, contains RhoGEF (also called
Dbl-homologous or DH), Pleckstrin homology (PH) and C2
domains. The second SH3 domain (or SH3B) of ITSN1 has
been shown to bind WNK and CdGAP. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 52
Score = 52.0 bits (124), Expect = 7e-09
Identities = 25/53 (47%), Positives = 35/53 (66%), Gaps = 1/53 (1%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
+A+AL + D+ L F KNDVIT++ Q+D W GE+ G KGWFP +V+L
Sbjct: 1 QAQALYPWRAKKDNHLNFNKNDVITVLEQQD-MWWFGEVQGQKGWFPKSYVKL 52
>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 = 52.0 bits (125), Expect = 8e-09
Identities = 23/52 (44%), Positives = 31/52 (59%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
A+AL D D +ELGF+ DVI ++ D+ W G + +GWFPA FV L
Sbjct: 2 AEALWDHVTMDPEELGFKAGDVIEVLDMSDKDWWWGSIRDEEGWFPASFVRL 53
>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 = 51.9 bits (125), Expect = 8e-09
Identities = 22/52 (42%), Positives = 30/52 (57%), Gaps = 1/52 (1%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLK-GWFPAKFVE 591
KAL D+ DEL F K+ +IT + ++D W G+ G K WFPA +VE
Sbjct: 2 VKALYDYRAQRPDELSFCKHAIITNVEKEDGGWWRGDYGGKKQKWFPANYVE 53
>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 = 51.9 bits (124), Expect = 9e-09
Identities = 22/52 (42%), Positives = 32/52 (61%)
Query: 539 RRAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
R+ +A+ DFE +D+EL F+ D+ITI+ D + W GE G FP+ FV
Sbjct: 1 RKVRAIYDFEAAEDNELTFKAGDIITILDDSDPNWWKGETPQGTGLFPSNFV 52
>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 = 51.2 bits (123), Expect = 2e-08
Identities = 18/53 (33%), Positives = 30/53 (56%), Gaps = 3/53 (5%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNG---LKGWFPAKF 589
R +AL D + +DDEL F + ++I + ++D+ W G + G +G FP F
Sbjct: 1 RVRALYDCQADNDDELTFSEGEIIVVTGEEDDEWWEGHIEGDPSRRGVFPVSF 53
>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 = 50.5 bits (120), Expect = 3e-08
Identities = 19/49 (38%), Positives = 30/49 (61%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
+A +F++ ++DEL F K DVI + ++ W G NG GWFP+ +V
Sbjct: 3 RAKFNFQQTNEDELSFSKGDVIHVTRVEEGGWWEGTHNGRTGWFPSNYV 51
>gnl|CDD|212764 cd11830, SH3_VAV_2, C-terminal (or second) Src homology 3 domain of
VAV proteins. VAV proteins function both as cytoplasmic
guanine nucleotide exchange factors (GEFs) for Rho
GTPases and scaffold proteins and they play important
roles in cell signaling by coupling cell surface
receptors to various effector functions. They play key
roles in processes that require cytoskeletal
reorganization including immune synapse formation,
phagocytosis, cell spreading, and platelet aggregation,
among others. Vertebrates have three VAV proteins (VAV1,
VAV2, and VAV3). VAV proteins contain several domains
that enable their function: N-terminal calponin homology
(CH), acidic, RhoGEF (also called Dbl-homologous or DH),
Pleckstrin Homology (PH), C1 (zinc finger), SH2, and two
SH3 domains. The SH3 domain of VAV is involved in the
localization of proteins to specific sites within the
cell, by interacting with proline-rich sequences within
target proteins. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 50.3 bits (120), Expect = 4e-08
Identities = 23/52 (44%), Positives = 32/52 (61%), Gaps = 1/52 (1%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQK-DEHCWIGELNGLKGWFPAKFVE 591
AKA DF D EL ++ DV+ I ++K + W GE+NG GWFP+ +VE
Sbjct: 2 AKARYDFCARDMRELSLKEGDVVKIYNKKGQQGWWRGEINGRIGWFPSTYVE 53
>gnl|CDD|212860 cd11927, SH3_SH3RF1_1, First Src Homology 3 domain of SH3 domain
containing ring finger protein 1, an E3
ubiquitin-protein ligase. SH3RF1 is also called POSH
(Plenty of SH3s) or SH3MD2 (SH3 multiple domains protein
2). It is a scaffold protein that acts as an E3
ubiquitin-protein ligase. It plays a role in calcium
homeostasis through the control of the ubiquitin domain
protein Herp. It may also have a role in regulating
death receptor mediated and JNK mediated apoptosis.
SH3RF1 also enhances the ubiquitination of ROMK1
potassium channel resulting in its increased
endocytosis. It contains an N-terminal RING finger
domain and four SH3 domains. This model represents the
first SH3 domain, located at the N-terminal half, of
SH3RF1. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 50.3 bits (120), Expect = 4e-08
Identities = 22/52 (42%), Positives = 35/52 (67%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
AKAL ++E + +L F K D+I + Q DE+ + GE+NG+ G+FP FV++
Sbjct: 3 AKALYNYEGKEPGDLKFSKGDIIILRRQVDENWYHGEVNGIHGFFPTNFVQI 54
>gnl|CDD|212715 cd11781, SH3_Sorbs_1, First Src Homology 3 domain of Sorbin and SH3
domain containing (Sorbs) proteins and similar domains.
This family, also called the vinexin family, is composed
predominantly of adaptor proteins containing one sorbin
homology (SoHo) and three SH3 domains. Members include
the first SH3 domains of Sorbs1 (or ponsin), Sorbs2 (or
ArgBP2), Vinexin (or Sorbs3), and similar domains. They
are involved in the regulation of cytoskeletal
organization, cell adhesion, and growth factor
signaling. Members of this family bind multiple partners
including signaling molecules like c-Abl, c-Arg, Sos,
and c-Cbl, as well as cytoskeletal molecules such as
vinculin and afadin. They may have overlapping
functions. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 50.0 bits (120), Expect = 4e-08
Identities = 22/52 (42%), Positives = 31/52 (59%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
A+AL F+ EL +K D+I I Q D++ + GE NG G FPA +VE+
Sbjct: 2 ARALYPFKAQSAKELSLKKGDIIYIRRQIDKNWYEGEHNGRVGIFPASYVEI 53
>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 = 50.0 bits (120), Expect = 4e-08
Identities = 24/54 (44%), Positives = 33/54 (61%), Gaps = 2/54 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITII-SQKDEHCWI-GELNGLKGWFPAKFVE 591
+ +AL FE + DE+ F+ D+I + SQ E W+ GEL G GWFPA +VE
Sbjct: 1 KYRALYAFEARNPDEISFQPGDIIQVDESQVAEPGWLAGELKGKTGWFPANYVE 54
>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 = 50.0 bits (119), Expect = 5e-08
Identities = 20/50 (40%), Positives = 32/50 (64%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
+ D+ +DDEL F K +I +++++D W GELNG G FP+ +V+L
Sbjct: 5 GMYDYTAQNDDELAFSKGQIINVLNKEDPDWWKGELNGQVGLFPSNYVKL 54
>gnl|CDD|212716 cd11782, SH3_Sorbs_2, Second Src Homology 3 domain of Sorbin and
SH3 domain containing (Sorbs) proteins and similar
domains. This family, also called the vinexin family,
is composed predominantly of adaptor proteins containing
one sorbin homology (SoHo) and three SH3 domains.
Members include the second SH3 domains of Sorbs1 (or
ponsin), Sorbs2 (or ArgBP2), Vinexin (or Sorbs3), and
similar domains. They are involved in the regulation of
cytoskeletal organization, cell adhesion, and growth
factor signaling. Members of this family bind multiple
partners including signaling molecules like c-Abl,
c-Arg, Sos, and c-Cbl, as well as cytoskeletal molecules
such as vinculin and afadin. They may have overlapping
functions. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 49.7 bits (119), Expect = 6e-08
Identities = 20/52 (38%), Positives = 30/52 (57%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
A+A +F EL FRK DVIT+ + DE+ + G + G +G FP +V+
Sbjct: 1 EARAKYNFNADTGVELSFRKGDVITLTRRVDENWYEGRIGGRQGIFPVSYVQ 52
>gnl|CDD|212906 cd11973, SH3_ASEF, Src homology 3 domain of APC-Stimulated guanine
nucleotide Exchange Factor. ASEF, also called ARHGEF4,
exists in an autoinhibited form and is activated upon
binding of the tumor suppressor APC (adenomatous
polyposis coli). GEFs activate small GTPases by
exchanging bound GDP for free GTP. ASEF can activate
Rac1 or Cdc42. Truncated ASEF, which is found in
colorectal cancers, is constitutively active and has
been shown to promote angiogenesis and cancer cell
migration. ASEF contains a SH3 domain followed by RhoGEF
(also called Dbl-homologous or DH) and Pleckstrin
Homology (PH) domains. In its autoinhibited form, the
SH3 domain of ASEF forms an extensive interface with the
DH and PH domains, blocking the Rac binding site. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 73
Score = 50.0 bits (119), Expect = 7e-08
Identities = 23/52 (44%), Positives = 31/52 (59%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
A+AL D DD ELGF+ DVI ++ ++ W G + +GWFPA FV L
Sbjct: 20 AEALWDHVTMDDQELGFKAGDVIEVMDATNKEWWWGRVLDSEGWFPASFVRL 71
>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 = 49.4 bits (118), Expect = 9e-08
Identities = 23/51 (45%), Positives = 33/51 (64%), Gaps = 2/51 (3%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQK--DEHCWIGELNGLKGWFPAKFV 590
KAL +E ++DEL F++ ++I IIS+ + W GELNG +G FP FV
Sbjct: 5 KALFHYEGTNEDELDFKEGEIILIISKDTGEPGWWKGELNGKEGVFPDNFV 55
>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 = 48.8 bits (116), Expect = 1e-07
Identities = 18/50 (36%), Positives = 34/50 (68%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
A+ D+ +++DEL F K +I ++++ D W GE+NG+ G FP+ +V++
Sbjct: 5 AMYDYTANNEDELSFSKGQLINVLNKDDPDWWQGEINGVTGLFPSNYVKM 54
>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 = 48.8 bits (117), Expect = 1e-07
Identities = 21/54 (38%), Positives = 28/54 (51%), Gaps = 1/54 (1%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWI-GELNGLKGWFPAKFVEL 592
RA+AL + D+ EL F +IT + DE W+ G LNG G P +VE
Sbjct: 1 RARALYACKAEDESELSFEPGQIITNVQPSDEPGWLEGTLNGRTGLIPENYVEF 54
>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 = 47.9 bits (114), Expect = 2e-07
Identities = 18/49 (36%), Positives = 31/49 (63%), Gaps = 1/49 (2%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGEL-NGLKGWFPAKFV 590
AL D+ + DEL + D+I ++ + +++ W G L NG +G+FPA +V
Sbjct: 4 ALYDYTANRSDELTIHRGDIIRVLYKDNDNWWFGSLVNGQQGYFPANYV 52
>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 = 47.9 bits (114), Expect = 2e-07
Identities = 21/52 (40%), Positives = 30/52 (57%), Gaps = 1/52 (1%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
A+ DF +DEL F+K DV+ I+S D ELNG +G+ P FV++
Sbjct: 2 ARGKFDFTASGEDELSFKKGDVLKILSSDDIWF-KAELNGEEGYVPKNFVDI 52
>gnl|CDD|212909 cd11976, SH3_VAV1_2, C-terminal (or second) Src homology 3 domain
of VAV1 protein. VAV1 is expressed predominantly in the
hematopoietic system and it plays an important role in
the development and activation of B and T cells. It is
activated by tyrosine phosphorylation to function as a
guanine nucleotide exchange factor (GEF) for Rho GTPases
following cell surface receptor activation, triggering
various effects such as cytoskeletal reorganization,
transcription regulation, cell cycle progression, and
calcium mobilization. It also serves as a scaffold
protein and has been shown to interact with Ku70, Socs1,
Janus kinase 2, SIAH2, S100B, Abl gene, ZAP-70, SLP76,
and Syk, among others. VAV proteins contain several
domains that enable their function: N-terminal calponin
homology (CH), acidic, RhoGEF (also called
Dbl-homologous or DH), Pleckstrin Homology (PH), C1
(zinc finger), SH2, and two SH3 domains. The C-terminal
SH3 domain of Vav1 interacts with a wide variety of
proteins including cytoskeletal regulators (zyxin),
RNA-binding proteins (Sam68), transcriptional
regulators, viral proteins, and dynamin 2. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 48.0 bits (114), Expect = 2e-07
Identities = 23/52 (44%), Positives = 32/52 (61%), Gaps = 1/52 (1%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEH-CWIGELNGLKGWFPAKFVE 591
AKA DF D EL ++ D+I I+++K + W GE+ G GWFPA +VE
Sbjct: 2 AKARYDFCARDRSELSLKEGDIIKILNKKGQQGWWRGEIYGRVGWFPANYVE 53
>gnl|CDD|212993 cd12060, SH3_alphaPIX, Src Homology 3 domain of alpha-Pak
Interactive eXchange factor. Alpha-PIX, also called Rho
guanine nucleotide exchange factor 6 (ARHGEF6) or Cool
(Cloned out of Library)-2, activates small GTPases by
exchanging bound GDP for free GTP. It acts as a GEF for
both Cdc42 and Rac 1, and is localized in dendritic
spines where it regulates spine morphogenesis. It
controls dendritic length and spine density in the
hippocampus. Mutations in the ARHGEF6 gene cause
X-linked intellectual disability in humans. PIX proteins
contain an N-terminal SH3 domain followed by RhoGEF
(also called Dbl-homologous or DH) and Pleckstrin
Homology (PH) domains, and a C-terminal leucine-zipper
domain for dimerization. The SH3 domain of PIX binds to
an atypical PxxxPR motif in p21-activated kinases (PAKs)
with high affinity. The binding of PAKs to PIX
facilitate the localization of PAKs to focal complexes
and also localizes PAKs to PIX targets Cdc43 and Rac,
leading to the activation of PAKs. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 48.1 bits (114), Expect = 3e-07
Identities = 20/54 (37%), Positives = 31/54 (57%)
Query: 538 QRRAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
Q KA +F++ ++DEL K D+I + ++ W G LNG GWFP+ +V
Sbjct: 1 QLVVKARFNFKQTNEDELSVCKGDIIYVTRVEEGGWWEGTLNGKTGWFPSNYVR 54
>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 = 47.8 bits (114), Expect = 3e-07
Identities = 21/55 (38%), Positives = 30/55 (54%), Gaps = 4/55 (7%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQK----DEHCWIGELNGLKGWFPAKFVE 591
+AL D+E D+EL F + +I I+ + D+ W GE NG G FP+ VE
Sbjct: 2 VRALYDYEAQSDEELSFPEGAIIRILRKDDNGVDDGWWEGEFNGRVGVFPSLVVE 56
>gnl|CDD|212807 cd11874, SH3_CD2AP-like_2, Second Src Homology 3 domain (SH3B) of
CD2-associated protein and similar proteins. This
subfamily is composed of the second SH3 domain (SH3B) of
CD2AP, CIN85 (Cbl-interacting protein of 85 kDa), and
similar domains. CD2AP and CIN85 are adaptor proteins
that bind to protein partners and assemble complexes
that have been implicated in T cell activation, kidney
function, and apoptosis of neuronal cells. They also
associate with endocytic proteins, actin cytoskeleton
components, and other adaptor proteins involved in
receptor tyrosine kinase (RTK) signaling. CD2AP and the
main isoform of CIN85 contain three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CD2AP and CIN85 to
bind various protein partners and assemble complexes
that have been implicated in many different functions.
SH3B of both proteins have been shown to bind to Cbl. In
the case of CD2AP, its SH3B binds to Cbl at a site
distinct from the c-Cbl/SH3A binding site. The CIN85
SH3B also binds ubiquitin. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 47.3 bits (113), Expect = 4e-07
Identities = 19/53 (35%), Positives = 30/53 (56%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
R K L + ++DEL + D I ++ + +E W G+LNG G FP+ FV+
Sbjct: 1 RCKVLFSYTPQNEDELELKVGDTIEVLGEVEEGWWEGKLNGKVGVFPSNFVKE 53
>gnl|CDD|212898 cd11965, SH3_ASAP1, Src homology 3 domain of ArfGAP with SH3
domain, ankyrin repeat and PH domain containing protein
1. ASAP1 is also called DDEF1 (Development and
Differentiation Enhancing Factor 1), AMAP1, centaurin
beta-4, or PAG2. an Arf GTPase activating protein (GAP)
with activity towards Arf1 and Arf5 but not Arf6.
However, it has been shown to bind GTP-Arf6 stably
without GAP activity. It has been implicated in cell
growth, migration, and survival, as well as in tumor
invasion and malignancy. It binds paxillin and
cortactin, two components of invadopodia which are
essential for tumor invasiveness. It also binds focal
adhesion kinase (FAK) and the SH2/SH3 adaptor CrkL.
ASAP1 contains an N-terminal BAR domain, followed by a
Pleckstrin homology (PH) domain, an Arf GAP domain,
ankyrin (ANK) repeats, and a C-terminal SH3 domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 47.3 bits (112), Expect = 4e-07
Identities = 22/57 (38%), Positives = 33/57 (57%), Gaps = 3/57 (5%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGL---KGWFPAKFVELL 593
R K + D + +DDEL F + +VI + ++D+ WIG + G KG FP FV +L
Sbjct: 1 RVKTIYDCQADNDDELTFVEGEVIIVTGEEDQEWWIGHIEGQPERKGVFPVSFVHIL 57
>gnl|CDD|212896 cd11963, SH3_STAM2, Src homology 3 domain of Signal Transducing
Adaptor Molecule 2. STAM2, also called EAST (Epidermal
growth factor receptor-associated protein with SH3 and
TAM domain) or Hbp (Hrs binding protein), is part of the
endosomal sorting complex required for transport
(ESCRT-0). It plays a role in sorting mono-ubiquinated
endosomal cargo for trafficking to the lysosome for
degradation. It is also involved in the regulation of
exocytosis. STAMs were discovered as proteins that are
highly phosphorylated following cytokine and growth
factor stimulation. They function in cytokine signaling
and surface receptor degradation, as well as regulate
Golgi morphology. They associate with many proteins
including Jak2 and Jak3 tyrosine kinases, Hrs, AMSH, and
UBPY. STAM adaptor proteins contain VHS (Vps27, Hrs,
STAM homology), ubiquitin interacting (UIM), and SH3
domains. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 46.9 bits (111), Expect = 5e-07
Identities = 20/52 (38%), Positives = 32/52 (61%)
Query: 539 RRAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
R+ +AL DFE +D+EL F+ ++I ++ D + W GE + G FP+ FV
Sbjct: 2 RKVRALYDFEAVEDNELTFKHGEIIIVLDDSDANWWKGENHRGVGLFPSNFV 53
>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 = 46.6 bits (111), Expect = 7e-07
Identities = 24/51 (47%), Positives = 27/51 (52%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
R A DFE +DEL F + DVIT+ E GELNG G FP FV
Sbjct: 1 RCVARFDFEGEQEDELSFSEGDVITLKEYVGEEWAKGELNGKIGIFPLNFV 51
>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 = 46.5 bits (110), Expect = 8e-07
Identities = 24/53 (45%), Positives = 31/53 (58%), Gaps = 3/53 (5%)
Query: 542 KALLDFERHDDDELGFRKNDVITIIS---QKDEHCWIGELNGLKGWFPAKFVE 591
KAL D+E DDEL F + +I I++ Q D+ W GE NG G FP+ VE
Sbjct: 3 KALYDYEGQTDDELSFPEGAIIRILNKENQDDDGFWEGEFNGRIGVFPSVLVE 55
>gnl|CDD|212775 cd11841, SH3_SH3YL1_like, Src homology 3 domain of SH3 domain
containing Ysc84-like 1 (SH3YL1) protein. SH3YL1
localizes to the plasma membrane and is required for
dorsal ruffle formation. It binds phosphoinositides
(PIs) with high affinity through its N-terminal SYLF
domain (also called DUF500). In addition, SH3YL1
contains a C-terminal SH3 domain which has been reported
to bind to N-WASP, dynamin 2, and SHIP2 (a PI
5-phosphatase). SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 46.2 bits (110), Expect = 8e-07
Identities = 19/52 (36%), Positives = 26/52 (50%), Gaps = 2/52 (3%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEH--CWIGELNGLKGWFPAKFV 590
AL FE +L F+ D IT++++ D W G L G G FPA +V
Sbjct: 2 VTALYSFEGQQPCDLSFQAGDRITVLTRTDSQFDWWEGRLRGRVGIFPANYV 53
>gnl|CDD|212721 cd11787, SH3_SH3RF_2, Second Src Homology 3 domain of SH3 domain
containing ring finger proteins. This model represents
the second SH3 domain of SH3RF1 (or POSH), SH3RF2 (or
POSHER), SH3RF3 (POSH2), and similar domains. Members of
this family are scaffold proteins that function as E3
ubiquitin-protein ligases. They all contain an
N-terminal RING finger domain and multiple SH3 domains;
SH3RF1 and SH3RF3 have four SH3 domains while SH3RF2 has
three. SH3RF1 plays a role in calcium homeostasis
through the control of the ubiquitin domain protein
Herp. It may also have a role in regulating death
receptor mediated and JNK mediated apoptosis. SH3RF3
interacts with p21-activated kinase 2 (PAK2) and
GTP-loaded Rac1. It may play a role in regulating JNK
mediated apoptosis in certain conditions. SH3RF2 acts as
an anti-apoptotic regulator of the JNK pathway by
binding to and promoting the degradation of SH3RF1. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 46.2 bits (110), Expect = 1e-06
Identities = 26/53 (49%), Positives = 31/53 (58%), Gaps = 5/53 (9%)
Query: 541 AKALLDFERHDDDE---LGFRKNDVITIISQKDEHCWI-GELNGLKGWFPAKF 589
KAL DFE D+DE L F+K DVIT+I + DE+ W G L G FP F
Sbjct: 2 CKALYDFEMKDEDEKDCLTFKKGDVITVIRRVDEN-WAEGRLGDKIGIFPISF 53
>gnl|CDD|212752 cd11818, SH3_Eve1_5, Fifth Src homology 3 domain of ADAM-binding
protein Eve-1. Eve-1, also called SH3 domain-containing
protein 19 (SH3D19) or EEN-binding protein (EBP), exists
in multiple alternatively spliced isoforms. The longest
isoform contains five SH3 domain in the C-terminal
region and seven proline-rich motifs in the N-terminal
region. It is abundantly expressed in skeletal muscle
and heart, and may be involved in regulating the
activity of ADAMs (A disintegrin and metalloproteases).
Eve-1 interacts with EEN, an endophilin involved in
endocytosis and may be the target of the MLL-EEN fusion
protein that is implicated in leukemogenesis. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 50
Score = 45.6 bits (108), Expect = 1e-06
Identities = 22/50 (44%), Positives = 29/50 (58%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKF 589
+A+AL DF ++DEL F+ D+IT + DE GEL G G FP F
Sbjct: 1 KARALYDFTGENEDELSFKAGDIITELESIDEEWMSGELRGKSGIFPKNF 50
>gnl|CDD|212985 cd12052, SH3_CIN85_1, First Src Homology 3 domain (SH3A) of
Cbl-interacting protein of 85 kDa. CIN85, also called
SH3 domain-containing kinase-binding protein 1 (SH3KBP1)
or CD2-binding protein 3 (CD2BP3) or Ruk, is an adaptor
protein that is involved in the downregulation of
receptor tyrosine kinases by facilitating endocytosis
through interaction with endophilin-associated ubiquitin
ligase Cbl proteins. It is also important in many other
cellular processes including vesicle-mediated transport,
cytoskeletal remodelling, apoptosis, cell adhesion and
migration, and viral infection, among others. CIN85
exists as multiple variants from alternative splicing;
the main variant contains three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CIN85 to bind
various protein partners and assemble complexes that
have been implicated in many different functions. This
alignment model represents the first SH3 domain (SH3A)
of CIN85; SH3A binds to internal proline-rich motifs
within the proline-rich region. This intramolecular
interaction serves as a regulatory mechanism to keep
CIN85 in a closed conformation, preventing the
recruitment of other proteins. SH3A has also been shown
to bind ubiquitin and to an atypical PXXXPR motif at the
C-terminus of Cbl and the cytoplasmic end of the cell
adhesion protein CD2. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 45.7 bits (108), Expect = 2e-06
Identities = 18/46 (39%), Positives = 25/46 (54%)
Query: 545 LDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
D++ +DEL D+IT I + D W GE+ G +G FP FV
Sbjct: 6 FDYKAQHEDELTITVGDIITKIKKDDGGWWEGEIKGRRGLFPDNFV 51
>gnl|CDD|212697 cd11763, SH3_SNX9_like, Src Homology 3 domain of Sorting Nexin 9
and similar proteins. Sorting nexins (SNXs) are Phox
homology (PX) domain containing proteins that are
involved in regulating membrane traffic and protein
sorting in the endosomal system. SNXs differ from each
other in their lipid-binding specificity, subcellular
localization and specific function in the endocytic
pathway. This subfamily consists of SH3 domain
containing SNXs including SNX9, SNX18, SNX33, and
similar proteins. SNX9 is localized to plasma membrane
endocytic sites and acts primarily in clathrin-mediated
endocytosis, while SNX18 is localized to peripheral
endosomal structures, and acts in a trafficking pathway
that is clathrin-independent but relies on AP-1 and
PACS1. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 45.4 bits (108), Expect = 2e-06
Identities = 19/54 (35%), Positives = 27/54 (50%), Gaps = 2/54 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELN--GLKGWFPAKFVE 591
+ +AL DF+ EL R +V+TI Q W+ N G G FP+ +VE
Sbjct: 1 KVRALYDFDSQPSGELSLRAGEVLTITRQDVGDGWLEGRNSRGEVGLFPSSYVE 54
>gnl|CDD|212861 cd11928, SH3_SH3RF3_1, First Src Homology 3 domain of SH3 domain
containing ring finger 3, an E3 ubiquitin-protein
ligase. SH3RF3 is also called POSH2 (Plenty of SH3s 2)
or SH3MD4 (SH3 multiple domains protein 4). It is a
scaffold protein with E3 ubiquitin-protein ligase
activity. It was identified in the screen for
interacting partners of p21-activated kinase 2 (PAK2).
It may play a role in regulating JNK mediated apoptosis
in certain conditions. It also interacts with GTP-loaded
Rac1. SH3RF3 is highly homologous to SH3RF1; it also
contains an N-terminal RING finger domain and four SH3
domains. This model represents the first SH3 domain,
located at the N-terminal half, of SH3RF3. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 45.3 bits (107), Expect = 2e-06
Identities = 19/51 (37%), Positives = 31/51 (60%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
KAL +E + +L F K D+I + + DE+ + GELNG G+ PA +++
Sbjct: 4 KALYSYEGKEPGDLKFNKGDIIILRRKVDENWYHGELNGCHGFLPASYIQC 54
>gnl|CDD|212730 cd11796, SH3_DNMBP_N3, Third N-terminal Src homology 3 domain of
Dynamin Binding Protein, also called Tuba. DNMBP or
Tuba is a cdc42-specific guanine nucleotide exchange
factor (GEF) that contains four N-terminal SH3 domains,
a central RhoGEF [or Dbl homology (DH)] domain followed
by a Bin/Amphiphysin/Rvs (BAR) domain, and two
C-terminal SH3 domains. It provides a functional link
between dynamin and key regulatory proteins of the actin
cytoskeleton. It plays an important role in regulating
cell junction configuration. The four N-terminal SH3
domains of DNMBP binds the GTPase dynamin, which plays
an important role in the fission of endocytic vesicles.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 51
Score = 45.0 bits (107), Expect = 2e-06
Identities = 22/51 (43%), Positives = 30/51 (58%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
+A+ L D D+EL R+ DV+TI D+ + GELNG +G FP FV
Sbjct: 1 QARVLQDLSAQLDEELDLREGDVVTITGILDKGWFRGELNGRRGIFPEGFV 51
>gnl|CDD|212903 cd11970, SH3_PLCgamma1, Src homology 3 domain of Phospholipase C
(PLC) gamma 1. PLCgamma1 is widely expressed and is
essential in growth and development. It is activated by
the TrkA receptor tyrosine kinase and functions as a key
regulator of cell differentiation. It is also the
predominant PLCgamma in T cells and is required for T
cell and NK cell function. PLCs catalyze the hydrolysis
of phosphatidylinositol (4,5)-bisphosphate
[PtdIns(4,5)P2] to produce Ins(1,4,5)P3 and
diacylglycerol (DAG). Ins(1,4,5)P3 initiates the calcium
signaling cascade while DAG functions as an activator of
PKC. PLCgamma contains a Pleckstrin homology (PH) domain
followed by an elongation factor (EF) domain, two
catalytic regions of PLC domains that flank two tandem
SH2 domains, followed by a SH3 domain and C2 domain. The
SH3 domain of PLCgamma1 directly interacts with
dynamin-1 and can serve as a guanine nucleotide exchange
factor (GEF). It also interacts with Cbl, inhibiting its
phosphorylation and activity. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 60
Score = 45.0 bits (106), Expect = 3e-06
Identities = 20/51 (39%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKG-WFPAKFVE 591
KAL D++ +DEL F KN +I + +++ W G+ G K WFP+ +VE
Sbjct: 7 KALFDYKAQREDELTFTKNAIIQNVEKQEGGWWRGDYGGKKQLWFPSNYVE 57
>gnl|CDD|212905 cd11972, SH3_Abi2, Src homology 3 domain of Abl Interactor 2. Abi2
is highly expressed in the brain and eye. It regulates
actin cytoskeletal reorganization at adherens junctions
and dendritic spines, which is important in cell
morphogenesis, migration, and cognitive function. Mice
deficient with Abi2 show defects in orientation and
migration of lens fibers, neuronal migration, dendritic
spine morphology, as well as deficits in learning and
memory. Abi proteins are adaptor proteins serving as
binding partners and substrates of Abl tyrosine kinases.
They are involved in regulating actin cytoskeletal
reorganization and play important roles in
membrane-ruffling, endocytosis, cell motility, and cell
migration. Abi proteins contain a homeobox homology
domain, a proline-rich region, and a SH3 domain. The SH3
domain of Abi binds to a PxxP motif in Abl. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 61
Score = 45.0 bits (106), Expect = 4e-06
Identities = 17/49 (34%), Positives = 31/49 (63%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
A+ D+ + +DEL F++ +I +I + D+ + G +NG+ G FP +VE
Sbjct: 7 AIYDYTKDKEDELSFQEGAIIYVIKKNDDGWYEGVMNGVTGLFPGNYVE 55
>gnl|CDD|212988 cd12055, SH3_CIN85_2, Second Src Homology 3 domain (SH3B) of
Cbl-interacting protein of 85 kDa. CIN85, also called
SH3 domain-containing kinase-binding protein 1 (SH3KBP1)
or CD2-binding protein 3 (CD2BP3) or Ruk, is an adaptor
protein that is involved in the downregulation of
receptor tyrosine kinases by facilitating endocytosis
through interaction with endophilin-associated ubiquitin
ligase Cbl proteins. It is also important in many other
cellular processes including vesicle-mediated transport,
cytoskeletal remodelling, apoptosis, cell adhesion and
migration, and viral infection, among others. CIN85
exists as multiple variants from alternative splicing;
the main variant contains three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CIN85 to bind
various protein partners and assemble complexes that
have been implicated in many different functions. This
alignment model represents the second SH3 domain (SH3B)
of CIN85. SH3B has been shown to bind Cbl proline-rich
peptides and ubiquitin. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 44.6 bits (105), Expect = 4e-06
Identities = 16/52 (30%), Positives = 29/52 (55%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
R + + ++DEL + D+I ++ + +E W G LNG G FP+ F++
Sbjct: 1 RCQVAFSYLPQNEDELELKVGDIIEVVGEVEEGWWEGVLNGKTGMFPSNFIK 52
>gnl|CDD|212910 cd11977, SH3_VAV2_2, C-terminal (or second) Src homology 3 domain
of VAV2 protein. VAV2 is widely expressed and functions
as a guanine nucleotide exchange factor (GEF) for RhoA,
RhoB and RhoG and also activates Rac1 and Cdc42. It is
implicated in many cellular and physiological functions
including blood pressure control, eye development,
neurite outgrowth and branching, EGFR endocytosis and
degradation, and cell cluster morphology, among others.
It has been reported to associate with Nek3. VAV
proteins contain several domains that enable their
function: N-terminal calponin homology (CH), acidic,
RhoGEF (also called Dbl-homologous or DH), Pleckstrin
Homology (PH), C1 (zinc finger), SH2, and two SH3
domains. The SH3 domain of VAV is involved in the
localization of proteins to specific sites within the
cell, by interacting with proline-rich sequences within
target proteins. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 58
Score = 44.6 bits (105), Expect = 4e-06
Identities = 23/53 (43%), Positives = 30/53 (56%), Gaps = 2/53 (3%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQ--KDEHCWIGELNGLKGWFPAKFVE 591
A A +F D EL R+ DV+ I S+ D+ W GE NG GWFP+ +VE
Sbjct: 3 AVARYNFAARDMRELSLREGDVVRIYSRIGGDQGWWKGETNGRIGWFPSTYVE 55
>gnl|CDD|212738 cd11804, SH3_GRB2_like_N, N-terminal Src homology 3 domain of
Growth factor receptor-bound protein 2 (GRB2) and
related proteins. This family includes the adaptor
protein GRB2 and related proteins including Drosophila
melanogaster Downstream of receptor kinase (DRK),
Caenorhabditis elegans Sex muscle abnormal protein 5
(Sem-5), GRB2-related adaptor protein (GRAP), GRAP2, and
similar proteins. Family members contain an N-terminal
SH3 domain, a central SH2 domain, and a C-terminal SH3
domain. GRB2/Sem-5/DRK is a critical signaling molecule
that regulates the Ras pathway by linking tyrosine
kinases to the Ras guanine nucleotide releasing protein
Sos (son of sevenless), which converts Ras to the active
GTP-bound state. GRAP2 plays an important role in T cell
receptor (TCR) signaling by promoting the formation of
the SLP-76:LAT complex, which couples the TCR to the Ras
pathway. GRAP acts as a negative regulator of T cell
receptor (TCR)-induced lymphocyte proliferation by
downregulating the signaling to the Ras/ERK pathway. The
N-terminal SH3 domain of GRB2 binds to Sos and
Sos-derived proline-rich peptides. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 52
Score = 44.3 bits (105), Expect = 5e-06
Identities = 16/51 (31%), Positives = 30/51 (58%), Gaps = 1/51 (1%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWI-GELNGLKGWFPAKFV 590
A A DF+ +DEL F+K ++ +++ +D+ W EL+G +G P ++
Sbjct: 2 AVAKHDFKATAEDELSFKKGSILKVLNMEDDPNWYKAELDGKEGLIPKNYI 52
>gnl|CDD|212979 cd12046, SH3_p67phox_C, C-terminal (or second) Src Homology 3
domain of the p67phox subunit of NADPH oxidase.
p67phox, also called Neutrophil cytosol factor 2
(NCF-2), is a cytosolic subunit of the phagocytic NADPH
oxidase complex (also called Nox2 or gp91phox) which
plays a crucial role in the cellular response to
bacterial infection. NADPH oxidase catalyzes the
transfer of electrons from NADPH to oxygen during
phagocytosis forming superoxide and reactive oxygen
species. p67phox plays a regulatory role and contains
N-terminal TPR, first SH3 (or N-terminal or central
SH3), PB1, and C-terminal SH3 domains. It binds, via its
C-terminal SH3 domain, to a proline-rich region of
p47phox and upon activation, this complex assembles with
flavocytochrome b558, the Nox2-p22phox heterodimer.
Concurrently, RacGTP translocates to the membrane and
interacts with the TPR domain of p67phox, which leads to
the activation of NADPH oxidase. The PB1 domain of
p67phox binds to its partner PB1 domain in p40phox, and
this facilitates the assembly of p47phox-p67phox at the
membrane. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 44.0 bits (104), Expect = 5e-06
Identities = 19/49 (38%), Positives = 29/49 (59%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
AL +E ++L F+K DVI ++S+ +E G+ G G FP+ FVE
Sbjct: 4 ALFSYEASQPEDLEFQKGDVILVLSKVNEDWLEGQCKGKIGIFPSAFVE 52
>gnl|CDD|212907 cd11974, SH3_ASEF2, Src homology 3 domain of APC-Stimulated guanine
nucleotide Exchange Factor 2. ASEF2, also called
Spermatogenesis-associated protein 13 (SPATA13), is a
GEF that localizes with actin at the leading edge of
cells and is important in cell migration and adhesion
dynamics. GEFs activate small GTPases by exchanging
bound GDP for free GTP. ASEF2 can activate both Rac 1
and Cdc42, but only Rac1 activation is necessary for
increased cell migration and adhesion turnover. Together
with APC (adenomatous polyposis coli) and Neurabin2, a
scaffold protein that binds F-actin, it is involved in
regulating HGF-induced cell migration. ASEF2 contains a
SH3 domain followed by RhoGEF (also called
Dbl-homologous or DH) and Pleckstrin Homology (PH)
domains. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 43.9 bits (103), Expect = 6e-06
Identities = 21/52 (40%), Positives = 28/52 (53%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
A+AL D DD EL F+ DVI ++ ++ W G + WFPA FV L
Sbjct: 3 AEALWDHVTMDDQELAFKAGDVIRVLEASNKDWWWGRNEDREAWFPASFVRL 54
>gnl|CDD|212830 cd11897, SH3_SNX18, Src Homology 3 domain of Sorting nexin 18.
SNX18 is localized to peripheral endosomal structures,
and acts in a trafficking pathway that is
clathrin-independent but relies on AP-1 and PACS1. It
binds FIP5 and is required for apical lumen formation.
It may also play a role in axonal elongation. SNXs are
Phox homology (PX) domain containing proteins that are
involved in regulating membrane traffic and protein
sorting in the endosomal system. SNX18 also contains BAR
and SH3 domains. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 44.2 bits (104), Expect = 6e-06
Identities = 20/55 (36%), Positives = 36/55 (65%), Gaps = 2/55 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELN--GLKGWFPAKFVEL 592
RA+AL DF + E+ R+++V+++ S++D W+ +N G +G FPA +VE+
Sbjct: 1 RARALYDFRSENPGEISLREHEVLSLCSEQDIEGWLEGVNSRGDRGLFPASYVEV 55
>gnl|CDD|212931 cd11998, SH3_PACSIN1-2, Src homology 3 domain of Protein kinase C
and Casein kinase Substrate in Neurons 1 (PACSIN1) and
PACSIN 2. PACSIN 1 or Syndapin I (Synaptic
dynamin-associated protein I) is expressed specifically
in the brain and is localized in neurites and synaptic
boutons. It binds the brain-specific proteins dynamin I,
synaptojanin, synapsin I, and neural Wiskott-Aldrich
syndrome protein (nWASP), and functions as a link
between the cytoskeletal machinery and synaptic vesicle
endocytosis. PACSIN 1 interacts with huntingtin and may
be implicated in the neuropathology of Huntington's
disease. PACSIN 2 or Syndapin II is expressed
ubiquitously and is involved in the regulation of
tubulin polymerization. It associates with Golgi
membranes and forms a complex with dynamin II which is
crucial in promoting vesicle formation from the
trans-Golgi network. PACSINs act as regulators of
cytoskeletal and membrane dynamics. Vetebrates harbor
three isoforms with distinct expression patterns and
specific functions. PACSINs contain an N-terminal F-BAR
domain and a C-terminal SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 44.2 bits (104), Expect = 6e-06
Identities = 21/54 (38%), Positives = 32/54 (59%), Gaps = 2/54 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWI-GEL-NGLKGWFPAKFVE 591
R +AL D++ + DEL F+ D +T + +DE W G L +G G +PA +VE
Sbjct: 2 RVRALYDYDGQEQDELSFKAGDELTKLEDEDEQGWCKGRLDSGQVGLYPANYVE 55
>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 = 43.9 bits (104), Expect = 7e-06
Identities = 18/51 (35%), Positives = 30/51 (58%), Gaps = 1/51 (1%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWIGE-LNGLKGWFPAKFVE 591
+AL DF +DD++L F+K +++T+I + +E W G G P +VE
Sbjct: 4 RALFDFPGNDDEDLPFKKGEILTVIRKPEEQWWNARNSEGKTGMIPVPYVE 54
>gnl|CDD|212904 cd11971, SH3_Abi1, Src homology 3 domain of Abl Interactor 1.
Abi1, also called e3B1, is a central regulator of actin
cytoskeletal reorganization through interactions with
many protein complexes. It is part of WAVE, a
nucleation-promoting factor complex, that links Rac 1
activation to actin polymerization causing lamellipodia
protrusion at the plasma membrane. Abi1 interact with
formins to promote protrusions at the leading edge of
motile cells. It also is a target of alpha4 integrin,
regulating membrane protrusions at sites of integrin
engagement. Abi proteins are adaptor proteins serving as
binding partners and substrates of Abl tyrosine kinases.
They are involved in regulating actin cytoskeletal
reorganization and play important roles in
membrane-ruffling, endocytosis, cell motility, and cell
migration. Abi proteins contain a homeobox homology
domain, a proline-rich region, and a SH3 domain. The SH3
domain of Abi binds to a PxxP motif in Abl. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 43.9 bits (103), Expect = 8e-06
Identities = 18/49 (36%), Positives = 29/49 (59%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
A+ D+ + DDEL F + +I +I + D+ + G NG+ G FP +VE
Sbjct: 4 AIYDYSKDKDDELSFMEGAIIYVIKKNDDGWYEGVCNGVTGLFPGNYVE 52
>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 = 43.4 bits (102), Expect = 9e-06
Identities = 21/55 (38%), Positives = 32/55 (58%)
Query: 539 RRAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVELL 593
R+ K L ++ ++DEL + D+I I + +E W G LNG G FP+ FV+ L
Sbjct: 1 RQCKVLFEYVPQNEDELELKVGDIIDINEEVEEGWWSGTLNGKSGLFPSNFVKEL 55
>gnl|CDD|212767 cd11833, SH3_Stac_1, First C-terminal Src homology 3 domain of SH3
and cysteine-rich domain-containing (Stac) proteins.
Stac proteins are putative adaptor proteins that contain
a cysteine-rich C1 domain and one or two SH3 domains at
the C-terminus. There are three mammalian members
(Stac1, Stac2, and Stac3) of this family. Stac1 and
Stac3 contain two SH3 domains while Stac2 contains a
single SH3 domain at the C-terminus. This model
represents the first C-terminal SH3 domain of Stac1 and
Stac3, and the single C-terminal SH3 domain of Stac2.
Stac1 and Stac2 have been found to be expressed
differently in mature dorsal root ganglia (DRG) neurons.
Stac1 is mainly expressed in peptidergic neurons while
Stac2 is found in a subset of nonpeptidergic and all
trkB+ neurons. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 43.3 bits (102), Expect = 1e-05
Identities = 17/48 (35%), Positives = 28/48 (58%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
AL F+ ++++L R D IT++ +E W G++ G+FPA FV
Sbjct: 4 ALYKFKPQENEDLEMRPGDKITLLDDSNEDWWKGKIEDRVGFFPANFV 51
>gnl|CDD|212803 cd11870, SH3_p67phox-like_C, C-terminal Src Homology 3 domain of
the p67phox subunit of NADPH oxidase and similar
proteins. This subfamily is composed of p67phox, NADPH
oxidase activator 1 (Noxa1), and similar proteins.
p67phox, also called Neutrophil cytosol factor 2
(NCF-2), and Noxa1 are homologs and are the cytosolic
subunits of the phagocytic (Nox2) and nonphagocytic
(Nox1) NADPH oxidase complexes, respectively. NADPH
oxidase catalyzes the transfer of electrons from NADPH
to oxygen during phagocytosis forming superoxide and
reactive oxygen species. p67phox and Noxa1 play
regulatory roles. p67phox contains N-terminal TPR, first
SH3 (or N-terminal or central SH3), PB1, and C-terminal
SH3 domains. Noxa1 has a similar domain architecture
except it is lacking the N-terminal SH3 domain. The TPR
domain of both binds activated GTP-bound Rac, while the
C-terminal SH3 domain of p67phox and Noxa1 binds the
polyproline motif found at the C-terminus of p47phox and
Noxo1, respectively. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 43.3 bits (102), Expect = 1e-05
Identities = 18/49 (36%), Positives = 27/49 (55%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
AL +E ++LGFR+ D I ++S+ +E G +G G FP FV
Sbjct: 4 ALHRYEAQGPEDLGFREGDTIDVLSEVNEAWLEGHSDGRVGIFPKCFVV 52
>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 = 43.3 bits (102), Expect = 1e-05
Identities = 18/53 (33%), Positives = 33/53 (62%), Gaps = 1/53 (1%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWI-GELNGLKGWFPAKFVEL 592
A AL F+ + DEL F+K D++ I++ +D+ W EL G +G+ P ++++
Sbjct: 2 AVALYSFQATESDELPFQKGDILKILNMEDDQNWYKAELQGREGYIPKNYIKV 54
>gnl|CDD|212853 cd11920, SH3_Sorbs2_1, First Src Homology 3 domain of Sorbin and
SH3 domain containing 2 (Sorbs2), also called
Arg-binding protein 2 (ArgBP2). Sorbs2 or ArgBP2 is an
adaptor protein containing one sorbin homology (SoHo)
and three SH3 domains. It regulates actin-dependent
processes including cell adhesion, morphology, and
migration. It is expressed in many tissues and is
abundant in the heart. Like vinexin, it is found in
focal adhesion where it interacts with vinculin and
afadin. It also localizes in epithelial cell stress
fibers and in cardiac muscle cell Z-discs. Sorbs2 has
been implicated to play roles in the signaling of c-Arg,
Akt, and Pyk2. Other interaction partners of Sorbs2
include c-Abl, flotillin, spectrin, dynamin 1/2,
synaptojanin, PTP-PEST, among others. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 43.1 bits (101), Expect = 1e-05
Identities = 20/53 (37%), Positives = 32/53 (60%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVELL 593
A+A+ DF+ EL F+K D + I+ + D++ + GE +G G FP +VE L
Sbjct: 3 ARAVYDFKAQTSKELSFKKGDTVYILRKIDQNWYEGEHHGRVGIFPISYVEKL 55
>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 = 42.9 bits (101), Expect = 1e-05
Identities = 18/49 (36%), Positives = 25/49 (51%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKF 589
A AL DF +++L F++ D I + D G LNG +G FP F
Sbjct: 2 AVALYDFTGETEEDLSFQRGDRILVTEHLDAEWSRGRLNGREGIFPRAF 50
>gnl|CDD|212992 cd12059, SH3_MLK1-3, Src Homology 3 domain of Mixed Lineage Kinases
1, 2, and 3. MLKs 1, 2, and 3 are Serine/Threonine
Kinases (STKs), catalyzing the transfer of the
gamma-phosphoryl group from ATP to S/T residues on
protein substrates. MLKs act as mitogen-activated
protein kinase kinase kinases (MAP3Ks, MKKKs, MAPKKKs),
which phosphorylate and activate MAPK kinases (MAPKKs or
MKKs or MAP2Ks), which in turn phosphorylate and
activate MAPKs during signaling cascades that are
important in mediating cellular responses to
extracellular signals. MLKs play roles in immunity and
inflammation, as well as in cell death, proliferation,
and cell cycle regulation. Little is known about the
specific function of MLK1, also called MAP3K9. It is
capable of activating the c-Jun N-terminal kinase
pathway. Mice lacking both MLK1 and MLK2 are viable,
fertile, and have normal life spans. MLK2, also called
MAP3K10, is abundant in brain, skeletal muscle, and
testis. It functions upstream of the MAPK, c-Jun
N-terminal kinase. It binds hippocalcin, a
calcium-sensor protein that protects neurons against
calcium-induced cell death. Both MLK2 and hippocalcin
may be associated with the pathogenesis of Parkinson's
disease. MLK3, also called MAP3K11, is highly expressed
in breast cancer cells and its signaling through c-Jun
N-terminal kinase has been implicated in the migration,
invasion, and malignancy of cancer cells. It also
functions as a negative regulator of Inhibitor of
Nuclear Factor-KappaB Kinase (IKK) and thus, impacts
inflammation and immunity. MLKs contain an SH3 domain, a
catalytic kinase domain, a leucine zipper, a
proline-rich region, and a CRIB domain that mediates
binding to GTP-bound Cdc42 and Rac. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 43.2 bits (102), Expect = 1e-05
Identities = 18/53 (33%), Positives = 30/53 (56%), Gaps = 5/53 (9%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQK-----DEHCWIGELNGLKGWFPAKFV 590
A+ D+E +DEL R+ D + ++S+ DE W G++N G FP+ +V
Sbjct: 4 AVFDYEASAEDELTLRRGDRVEVLSKDSAVSGDEGWWTGKINDRVGIFPSNYV 56
>gnl|CDD|212895 cd11962, SH3_Abp1_fungi_C1, First C-terminal Src homology 3 domain
of Fungal Actin-binding protein 1. Abp1 is an adaptor
protein that functions in receptor-mediated endocytosis
and vesicle trafficking. It contains an N-terminal
actin-binding module, the actin-depolymerizing factor
(ADF) homology domain, a central proline-rich region,
and a C-terminal SH3 domain (many yeast Abp1 proteins
contain two C-terminal SH3 domains). Yeast Abp1 also
contains two acidic domains that bind directly to the
Arp2/3 complex, which is required to initiate actin
polymerization. The SH3 domain of yeast Abp1 binds and
localizes the kinases, Ark1p and Prk1p, which facilitate
actin patch disassembly following vesicle
internalization. It also mediates the localization to
the actin patch of the synaptojanin-like protein, Sjl2p,
which plays a key role in endocytosis. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 54
Score = 42.9 bits (101), Expect = 1e-05
Identities = 20/54 (37%), Positives = 32/54 (59%), Gaps = 1/54 (1%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGE-LNGLKGWFPAKFVEL 592
RA L D+E+ +D+E+ + +++T I DE W+G G G FP+ +VEL
Sbjct: 1 RAVVLYDYEKDEDNEIELVEGEIVTNIEMVDEDWWMGTNSKGESGLFPSNYVEL 54
>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 = 42.9 bits (101), Expect = 1e-05
Identities = 17/50 (34%), Positives = 28/50 (56%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
+A DF D +L FR+ D+I ++ D + W G ++G G+FP +V
Sbjct: 2 VQAQYDFSAEDPSQLSFRRGDIIEVLDCPDPNWWRGRISGRVGFFPRNYV 51
>gnl|CDD|212743 cd11809, SH3_srGAP, Src homology 3 domain of Slit-Robo GTPase
Activating Proteins. Slit-Robo GTPase Activating
Proteins (srGAPs) are Rho GAPs that interact with Robo1,
the transmembrane receptor of Slit proteins. Slit
proteins are secreted proteins that control axon
guidance and the migration of neurons and leukocytes.
Vertebrates contain three isoforms of srGAPs (srGAP1-3),
all of which are expressed during embryonic and early
development in the nervous system but with different
localization and timing. A fourth member has also been
reported (srGAP4, also called ARHGAP4). srGAPs contain
an N-terminal F-BAR domain, a Rho GAP domain, and a
C-terminal SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 42.4 bits (100), Expect = 2e-05
Identities = 19/52 (36%), Positives = 28/52 (53%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
A A D+ + EL F+K D +T+ Q + W G+LNG G P K++ L
Sbjct: 2 ATAQFDYTGRSERELSFKKGDSLTLYRQVSDDWWRGQLNGQDGLVPHKYITL 53
>gnl|CDD|212908 cd11975, SH3_ARHGEF9, Src homology 3 domain of the Rho guanine
nucleotide exchange factor ARHGEF9. ARHGEF9, also
called PEM2 or collybistin, selectively activates Cdc42
by exchanging bound GDP for free GTP. It is highly
expressed in the brain and it interacts with gephyrin, a
postsynaptic protein associated with GABA and glycine
receptors. Mutations in the ARHGEF9 gene cause X-linked
mental retardation with associated features like
seizures, hyper-anxiety, aggressive behavior, and
sensory hyperarousal. ARHGEF9 contains a SH3 domain
followed by RhoGEF (also called Dbl-homologous or DH)
and Pleckstrin Homology (PH) domains. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 62
Score = 42.4 bits (99), Expect = 3e-05
Identities = 19/52 (36%), Positives = 31/52 (59%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
A+A+ D + EL F+ DVI ++ ++ W G+++ +GWFPA FV L
Sbjct: 7 AEAVWDHVTMANRELAFKAGDVIKVLDASNKDWWWGQIDDEEGWFPASFVRL 58
>gnl|CDD|212879 cd11946, SH3_GRB2_N, N-terminal Src homology 3 domain of Growth
factor receptor-bound protein 2. GRB2 is a critical
signaling molecule that regulates the Ras pathway by
linking tyrosine kinases to the Ras guanine nucleotide
releasing protein Sos (son of sevenless), which converts
Ras to the active GTP-bound state. It is ubiquitously
expressed in all tissues throughout development and is
important in cell cycle progression, motility,
morphogenesis, and angiogenesis. In lymphocytes, GRB2 is
associated with antigen receptor signaling components.
GRB2 contains an N-terminal SH3 domain, a central SH2
domain, and a C-terminal SH3 domain. Its N-terminal SH3
domain binds to Sos and Sos-derived proline-rich
peptides. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 56
Score = 42.3 bits (99), Expect = 3e-05
Identities = 18/53 (33%), Positives = 33/53 (62%), Gaps = 1/53 (1%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWI-GELNGLKGWFPAKFVEL 592
A A DF+ DDEL F++ D++ +++++ + W ELNG G+ P ++E+
Sbjct: 3 AIAKYDFKATADDELSFKRGDILKVLNEECDQNWYKAELNGKDGFIPKNYIEM 55
>gnl|CDD|212911 cd11978, SH3_VAV3_2, C-terminal (or second) Src homology 3 domain
of VAV3 protein. VAV3 is ubiquitously expressed and
functions as a phosphorylation-dependent guanine
nucleotide exchange factor (GEF) for RhoA, RhoG, and
Rac1. It has been implicated to function in the
hematopoietic, bone, cerebellar, and cardiovascular
systems. VAV3 is essential in axon guidance in neurons
that control blood pressure and respiration. It is
overexpressed in prostate cancer cells and it plays a
role in regulating androgen receptor transcriptional
activity. VAV proteins contain several domains that
enable their function: N-terminal calponin homology
(CH), acidic, RhoGEF (also called Dbl-homologous or DH),
Pleckstrin Homology (PH), C1 (zinc finger), SH2, and two
SH3 domains. The SH3 domain of VAV is involved in the
localization of proteins to specific sites within the
cell, by interacting with proline-rich sequences within
target proteins. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 42.3 bits (99), Expect = 3e-05
Identities = 22/52 (42%), Positives = 29/52 (55%), Gaps = 1/52 (1%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWI-GELNGLKGWFPAKFVE 591
A A DF D EL K DV+ I ++ + W GE+NG GWFP+ +VE
Sbjct: 3 AIARYDFCARDMRELSLLKGDVVKIYTKMSTNGWWRGEVNGRVGWFPSTYVE 54
>gnl|CDD|212930 cd11997, SH3_PACSIN3, Src homology 3 domain of Protein kinase C and
Casein kinase Substrate in Neurons 3 (PACSIN3). PACSIN
3 or Syndapin III (Synaptic dynamin-associated protein
III) is expressed ubiquitously and regulates glucose
uptake in adipocytes through its role in GLUT1
trafficking. It also modulates the subcellular
localization and stimulus-specific function of the
cation channel TRPV4. PACSINs act as regulators of
cytoskeletal and membrane dynamics. Vetebrates harbor
three isoforms with distinct expression patterns and
specific functions. PACSINs contain an N-terminal F-BAR
domain and a C-terminal SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 42.3 bits (99), Expect = 3e-05
Identities = 20/54 (37%), Positives = 31/54 (57%), Gaps = 2/54 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWI-GEL-NGLKGWFPAKFVE 591
R +AL D+ + DEL F+ + + I ++DE W G L +G G +PA +VE
Sbjct: 3 RVRALYDYTGQEADELSFKAGEELLKIGEEDEQGWCKGRLLSGRIGLYPANYVE 56
>gnl|CDD|212852 cd11919, SH3_Sorbs1_1, First Src Homology 3 domain of Sorbin and
SH3 domain containing 1 (Sorbs1), also called ponsin.
Sorbs1 is also called ponsin, SH3P12, or CAP (c-Cbl
associated protein). It is an adaptor protein containing
one sorbin homology (SoHo) and three SH3 domains. It
binds Cbl and plays a major role in regulating the
insulin signaling pathway by enhancing insulin-induced
phosphorylation of Cbl. Sorbs1, like vinexin, localizes
at cell-ECM and cell-cell adhesion sites where it binds
vinculin, paxillin, and afadin. It may function in the
control of cell motility. Other interaction partners of
Sorbs1 include c-Abl, Sos, flotillin, Grb4, ataxin-7,
filamin C, among others. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 42.3 bits (99), Expect = 3e-05
Identities = 21/55 (38%), Positives = 32/55 (58%)
Query: 539 RRAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVELL 593
R A+A DF+ EL +K D++ I Q D++ + GE +G G FP ++ELL
Sbjct: 1 RPARAKFDFKAQTLKELPLQKGDIVYIYKQIDQNWYEGEHHGRVGIFPRSYIELL 55
>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 = 41.9 bits (99), Expect = 3e-05
Identities = 18/52 (34%), Positives = 28/52 (53%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
A ++E +DEL RK D + ++ + + W GE NG GWFP+ +V
Sbjct: 1 PAVVKFNYEAQREDELSLRKGDRVLVLEKSSDGWWRGECNGQVGWFPSNYVT 52
>gnl|CDD|212709 cd11775, SH3_Sla1p_3, Third Src Homology 3 domain of the fungal
endocytic adaptor protein Sla1p. Sla1p facilitates
endocytosis by playing a role as an adaptor protein in
coupling components of the actin cytoskeleton to the
endocytic machinery. It interacts with Abp1p, Las17p and
Pan1p, which are activator proteins of actin-related
protein 2/3 (Arp2/3). Sla1p contains multiple domains
including three SH3 domains, a SAM (sterile alpha motif)
domain, and a Sla1 homology domain 1 (SHD1), which binds
to the NPFXD motif that is found in many integral
membrane proteins such as the Golgi-localized
Arf-binding protein Lsb5p and the P4-ATPases, Drs2p and
Dnf1p. The third SH3 domain of Sla1p can bind ubiquitin
while retaining the ability to bind proline-rich
ligands; monoubiquitination of target proteins signals
internalization and sorting through the endocytic
pathway. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 41.9 bits (99), Expect = 3e-05
Identities = 20/57 (35%), Positives = 31/57 (54%), Gaps = 3/57 (5%)
Query: 539 RRAKALLDFERHDDDELGFRKNDVITIISQKDEH-CWIGEL--NGLKGWFPAKFVEL 592
+R K L DF+ DDEL ++ DV+ I+ K W+ E G +G PA ++E+
Sbjct: 1 KRGKVLYDFDAQSDDELTVKEGDVVYILDDKKSKDWWMVENVSTGKEGVVPASYIEI 57
>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 = 41.6 bits (98), Expect = 4e-05
Identities = 20/54 (37%), Positives = 30/54 (55%), Gaps = 2/54 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLK-GWFPAKFVEL 592
A AL + ++ L F K D+IT + ++ E W GEL G + GWFP +V+
Sbjct: 1 TATALYPWRAKKENHLSFAKGDIIT-VLEQQEMWWFGELEGGEEGWFPKSYVKE 53
>gnl|CDD|212986 cd12053, SH3_CD2AP_1, First Src Homology 3 domain (SH3A) of
CD2-associated protein. CD2AP, also called CMS (Cas
ligand with Multiple SH3 domains) or METS1
(Mesenchyme-to-Epithelium Transition protein with SH3
domains), is a cytosolic adaptor protein that plays a
role in regulating the cytoskeleton. It is critical in
cell-to-cell union necessary for kidney function. It
also stabilizes the contact between a T cell and
antigen-presenting cells. It is primarily expressed in
podocytes at the cytoplasmic face of the slit diaphragm
and serves as a linker anchoring podocin and nephrin to
the actin cytoskeleton. CD2AP contains three SH3
domains, a proline-rich region, and a C-terminal
coiled-coil domain. All of these domains enable CD2AP to
bind various protein partners and assemble complexes
that have been implicated in many different functions.
This alignment model represents the first SH3 domain
(SH3A) of CD2AP. SH3A binds to the PXXXPR motif present
in c-Cbl and the cytoplasmic domain of cell adhesion
protein CD2. Its interaction with CD2 anchors CD2 at
sites of cell contact. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 41.0 bits (96), Expect = 6e-05
Identities = 18/47 (38%), Positives = 29/47 (61%), Gaps = 1/47 (2%)
Query: 546 DFERHDDDELGFRKNDVITIISQKDEHCWI-GELNGLKGWFPAKFVE 591
D++ +DEL R ++I + + +E W+ GELNG +G FP FV+
Sbjct: 7 DYDAVHEDELTIRVGEIIRNVKKLEEEGWLEGELNGRRGMFPDNFVK 53
>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 = 41.1 bits (97), Expect = 6e-05
Identities = 17/50 (34%), Positives = 26/50 (52%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
+AL D+E DEL F + D++ I + D + W G G P+ +VE
Sbjct: 3 RALYDYEAQHPDELSFEEGDLLYISDKSDPNWWKATCGGKTGLIPSNYVE 52
>gnl|CDD|212920 cd11987, SH3_Intersectin1_1, First Src homology 3 domain (or SH3A)
of Intersectin-1. Intersectin-1 (ITSN1) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN1 localizes in membranous organelles, CCPs, the
Golgi complex, and may be involved in the cell membrane
trafficking system. It exists in alternatively spliced
short and long isoforms. The short isoform contains two
Eps15 homology domains (EH1 and EH2), a coiled-coil
region and five SH3 domains (SH3A-E), while the long
isoform, in addition, contains RhoGEF (also called
Dbl-homologous or DH), Pleckstrin homology (PH) and C2
domains. The first SH3 domain (or SH3A) of ITSN1 has
been shown to bind many proteins including Sos1,
dynamin1/2, CIN85, c-Cbl, PI3K-C2, SHIP2, N-WASP, and
CdGAP, among others. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 41.1 bits (96), Expect = 7e-05
Identities = 21/52 (40%), Positives = 29/52 (55%), Gaps = 2/52 (3%)
Query: 542 KALLDFERHDDDELGFRKNDVITII-SQKDEHCWIG-ELNGLKGWFPAKFVE 591
+AL FE DE+ + D++ + SQ E W+G EL G GWFPA + E
Sbjct: 3 RALYPFEARSHDEITIQPGDIVMVDESQTGEPGWLGGELKGKTGWFPANYAE 54
>gnl|CDD|212740 cd11806, SH3_PRMT2, Src homology 3 domain of Protein arginine
N-methyltransferase 2. PRMT2, also called HRMT1L1,
belongs to the arginine methyltransferase protein
family. It functions as a coactivator to both estrogen
receptor alpha (ER-alpha) and androgen receptor (AR),
presumably through arginine methylation. The ER-alpha
transcription factor is involved in cell proliferation,
differentiation, morphogenesis, and apoptosis, and is
also implicated in the development and progression of
breast cancer. PRMT2 and its variants are upregulated in
breast cancer cells and may be involved in modulating
the ER-alpha signaling pathway during formation of
breast cancer. PRMT2 also plays a role in regulating the
function of E2F transcription factors, which are
critical cell cycle regulators, by binding to the
retinoblastoma gene product (RB). It contains an
N-terminal SH3 domain and an AdoMet binding domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 40.8 bits (96), Expect = 7e-05
Identities = 15/48 (31%), Positives = 23/48 (47%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
A+ DF DD +L F D + ++ + W E NG G+ PA +
Sbjct: 4 AIADFVATDDSQLSFESGDKLLVLRKPSVDWWWAEHNGCCGYIPASHL 51
>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 = 40.8 bits (96), Expect = 8e-05
Identities = 18/53 (33%), Positives = 28/53 (52%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
+ L D+ +DDEL K DV+ +I + ++ W E NG KG P ++E
Sbjct: 1 KYSVLYDYTAQEDDELSISKGDVVAVIEKGEDGWWTVERNGQKGLVPGTYLEK 53
>gnl|CDD|212809 cd11876, SH3_MLK, Src Homology 3 domain of Mixed Lineage Kinases.
MLKs are Serine/Threonine Kinases (STKs), catalyzing the
transfer of the gamma-phosphoryl group from ATP to S/T
residues on protein substrates. MLKs act as
mitogen-activated protein kinase kinase kinases (MAP3Ks,
MKKKs, MAPKKKs), which phosphorylate and activate MAPK
kinases (MAPKKs or MKKs or MAP2Ks), which in turn
phosphorylate and activate MAPKs during signaling
cascades that are important in mediating cellular
responses to extracellular signals. MLKs play roles in
immunity and inflammation, as well as in cell death,
proliferation, and cell cycle regulation. Mammals have
four MLKs (MLK1-4), mostly conserved in vertebrates,
which contain an SH3 domain, a catalytic kinase domain,
a leucine zipper, a proline-rich region, and a CRIB
domain that mediates binding to GTP-bound Cdc42 and Rac.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 41.0 bits (96), Expect = 9e-05
Identities = 16/53 (30%), Positives = 28/53 (52%), Gaps = 5/53 (9%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQK-----DEHCWIGELNGLKGWFPAKFV 590
AL D++ +DEL R+ + ++S+ DE W G++ G FP+ +V
Sbjct: 4 ALFDYDARGEDELTLRRGQPVEVLSKDAAVSGDEGWWTGKIGDKVGIFPSNYV 56
>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 = 40.8 bits (96), Expect = 1e-04
Identities = 21/61 (34%), Positives = 29/61 (47%), Gaps = 7/61 (11%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKD----EHCW---IGELNGLKGWFPAKFVEL 592
+ +A D+ D DEL F K DVI +I D + W + E G +G FP F E
Sbjct: 4 KVRATHDYTAEDTDELTFEKGDVILVIPFDDPEEQDEGWLMGVKESTGCRGVFPENFTER 63
Query: 593 L 593
+
Sbjct: 64 I 64
>gnl|CDD|212899 cd11966, SH3_ASAP2, Src homology 3 domain of ArfGAP with SH3
domain, ankyrin repeat and PH domain containing protein
2. ASAP2 is also called DDEF2 (Development and
Differentiation Enhancing Factor 2), AMAP2, centaurin
beta-3, or PAG3. It mediates the functions of Arf
GTPases vial dual mechanisms: it exhibits GTPase
activating protein (GAP) activity towards class I (Arf1)
and II (Arf5) Arfs; and it binds class III Arfs
(GTP-Arf6) stably without GAP activity. It binds
paxillin and is implicated in Fcgamma receptor-mediated
phagocytosis in macrophages and in cell migration. ASAP2
contains an N-terminal BAR domain, followed by a
Pleckstrin homology (PH) domain, an Arf GAP domain,
ankyrin (ANK) repeats, and a C-terminal SH3 domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 56
Score = 40.3 bits (94), Expect = 1e-04
Identities = 19/54 (35%), Positives = 31/54 (57%), Gaps = 3/54 (5%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNG---LKGWFPAKFV 590
R KAL + + DEL F + ++I + ++D+ WIG ++G +G FP FV
Sbjct: 1 RVKALYNCVADNPDELTFSEGEIIIVDGEEDKEWWIGHIDGEPTRRGAFPVSFV 54
>gnl|CDD|212763 cd11829, SH3_GAS7, Src homology 3 domain of Growth Arrest Specific
protein 7. GAS7 is mainly expressed in the brain and is
required for neurite outgrowth. It may also play a role
in the protection and migration of embryonic stem cells.
Treatment-related acute myeloid leukemia (AML) has been
reported resulting from mixed-lineage leukemia
(MLL)-GAS7 translocations as a complication of primary
cancer treatment. GAS7 contains an N-terminal SH3
domain, followed by a WW domain, and a central F-BAR
domain. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 40.2 bits (94), Expect = 1e-04
Identities = 19/53 (35%), Positives = 28/53 (52%), Gaps = 3/53 (5%)
Query: 540 RAKALLDF--ERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
+ L F E+H L F ++I ++ D W GE +GL+GWFPA +V
Sbjct: 1 LCRTLYAFTGEQHQQG-LSFEAGELIRVLQAPDGGWWEGEKDGLRGWFPASYV 52
>gnl|CDD|212935 cd12002, SH3_NEDD9, Src homology 3 domain of CAS (Crk-Associated
Substrate) scaffolding protein family member, Neural
precursor cell Expressed, Developmentally Down-regulated
9. NEDD9 is also called human enhancer of filamentation
1 (HEF1) or CAS-L (Crk-associated substrate in
lymphocyte). It was first described as a gene
predominantly expressed in early embryonic brain, and
was also isolated from a screen of human proteins that
regulate filamentous budding in yeast, and as a tyrosine
phosphorylated protein in lymphocytes. It promotes
metastasis in different solid tumors. NEDD9 localizes in
focal adhesions and associates with FAK and Abl kinase.
It also interacts with SMAD3 and the proteasomal
machinery which allows its rapid turnover; these
interactions are not shared by other CAS proteins. CAS
proteins function as molecular scaffolds to regulate
protein complexes that are involved in many cellular
processes. They share a common domain structure that
includes an N-terminal SH3 domain, an unstructured
substrate domain that contains many YxxP motifs, a
serine-rich four-helix bundle, and a FAT-like C-terminal
domain. The SH3 domain of CAS proteins binds to diverse
partners including FAK, FRNK, Pyk2, PTP-PEST, DOCK180,
among others. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 40.4 bits (94), Expect = 1e-04
Identities = 21/56 (37%), Positives = 31/56 (55%), Gaps = 3/56 (5%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKD---EHCWIGELNGLKGWFPAKFVELL 593
A+AL D +EL FRK D++T+I Q E W+ L+G +G P ++LL
Sbjct: 2 ARALYDNVPECAEELAFRKGDILTVIEQNTGGLEGWWLCSLHGRQGIAPGNRLKLL 57
>gnl|CDD|212802 cd11869, SH3_p40phox, Src Homology 3 domain of the p40phox subunit
of NADPH oxidase. p40phox, also called Neutrophil
cytosol factor 4 (NCF-4), is a cytosolic subunit of the
phagocytic NADPH oxidase complex (also called Nox2 or
gp91phox) which plays a crucial role in the cellular
response to bacterial infection. NADPH oxidase catalyzes
the transfer of electrons from NADPH to oxygen during
phagocytosis forming superoxide and reactive oxygen
species. p40phox positively regulates NADPH oxidase in
both phosphatidylinositol-3-phosphate (PI3P)-dependent
and PI3P-independent manner. It contains an N-terminal
PX domain, a central SH3 domain, and a C-terminal PB1
domain that interacts with p67phox. The SH3 domain of
p40phox binds to canonical polyproline and noncanonical
motifs at the C-terminus of p47phox. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 54
Score = 39.8 bits (93), Expect = 2e-04
Identities = 20/54 (37%), Positives = 32/54 (59%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVELL 593
RA+AL DF + EL F+ DVI ++S+ ++ G + G G FP FV+++
Sbjct: 1 RAEALFDFTGNSKLELNFKAGDVIFLLSRVNKDWLEGTVRGATGIFPLSFVKII 54
>gnl|CDD|212704 cd11770, SH3_Nephrocystin, Src Homology 3 domain of Nephrocystin
(or Nephrocystin-1). Nephrocystin contains an SH3
domain involved in signaling pathways that regulate cell
adhesion and cytoskeletal organization. It is a protein
that in humans is associated with juvenile
nephronophthisis, an inherited kidney disease
characterized by renal fibrosis that lead to chronic
renal failure in children. It is localized in cell-cell
junctions in renal duct cells, and is known to interact
with Ack1, an activated Cdc42-associated kinase. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 39.6 bits (93), Expect = 2e-04
Identities = 16/51 (31%), Positives = 31/51 (60%), Gaps = 1/51 (1%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGE-LNGLKGWFPAKFVEL 592
AL DF+ + +L F+K +V+ IIS++ + W+ E G +G P ++++
Sbjct: 4 ALSDFQAEQEGDLSFKKGEVLRIISKRADGWWLAENSKGNRGLVPKTYLKV 54
>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 = 39.7 bits (93), Expect = 2e-04
Identities = 17/47 (36%), Positives = 27/47 (57%), Gaps = 3/47 (6%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDE---HCWIGELNGLKGWFP 586
AL D+E + DEL FR+ D +T++ + D+ W LN +G+ P
Sbjct: 5 ALFDYEAENGDELSFREGDELTVLRKGDDDETEWWWARLNDKEGYVP 51
>gnl|CDD|212991 cd12058, SH3_MLK4, Src Homology 3 domain of Mixed Lineage Kinase 4.
MLK4 is a Serine/Threonine Kinase (STK), catalyzing the
transfer of the gamma-phosphoryl group from ATP to S/T
residues on protein substrates. MLKs act as
mitogen-activated protein kinase kinase kinases (MAP3Ks,
MKKKs, MAPKKKs), which phosphorylate and activate MAPK
kinases (MAPKKs or MKKs or MAP2Ks), which in turn
phosphorylate and activate MAPKs during signaling
cascades that are important in mediating cellular
responses to extracellular signals. MLKs play roles in
immunity and inflammation, as well as in cell death,
proliferation, and cell cycle regulation. The specific
function of MLK4 is yet to be determined. Mutations in
the kinase domain of MLK4 have been detected in
colorectal cancers. MLK4 contains an SH3 domain, a
catalytic kinase domain, a leucine zipper, a
proline-rich region, and a CRIB domain that mediates
binding to GTP-bound Cdc42 and Rac. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 39.5 bits (92), Expect = 2e-04
Identities = 20/53 (37%), Positives = 30/53 (56%), Gaps = 5/53 (9%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQK-----DEHCWIGELNGLKGWFPAKFV 590
AL D+E +DEL R+ DV+ ++SQ D+ W G++ G FPA +V
Sbjct: 4 ALYDYEASGEDELSLRRGDVVEVLSQDAAVSGDDGWWAGKIRHRLGIFPANYV 56
>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 = 39.6 bits (92), Expect = 3e-04
Identities = 20/55 (36%), Positives = 30/55 (54%), Gaps = 3/55 (5%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDE---HCWIGELNGLKGWFPAKFVEL 592
AL D+E + DEL F++ D ITI+ +KD+ W LN +G+ P + L
Sbjct: 3 VYALWDYEAQNADELSFQEGDAITILRRKDDSETEWWWARLNDKEGYVPKNLLGL 57
>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 = 39.2 bits (92), Expect = 3e-04
Identities = 20/55 (36%), Positives = 30/55 (54%), Gaps = 2/55 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIG--ELNGLKGWFPAKFVEL 592
R +A+ D+ DDDE+ F++ DVI + D+ G + G G PA +VEL
Sbjct: 1 RYRAMYDYAAADDDEVSFQEGDVIINVEIIDDGWMEGTVQRTGQSGMLPANYVEL 55
>gnl|CDD|212946 cd12013, SH3_RIM-BP_3, Third Src homology 3 domain of
Rab3-interacting molecules (RIMs) binding proteins.
RIMs binding proteins (RBPs, RIM-BPs) associate with
calcium channels present in photoreceptors, neurons, and
hair cells; they interact simultaneously with specific
calcium channel subunits, and active zone proteins, RIM1
and RIM2. RIMs are part of the matrix at the presynaptic
active zone and are associated with synaptic vesicles
through their interaction with the small GTPase Rab3.
RIM-BPs play a role in regulating synaptic transmission
by serving as adaptors and linking calcium channels with
the synaptic vesicle release machinery. RIM-BPs contain
three SH3 domains and two to three fibronectin III
repeats. Invertebrates contain one, while vertebrates
contain at least two RIM-BPs, RIM-BP1 and RIM-BP2.
RIM-BP1 is also called peripheral-type benzodiazapine
receptor associated protein 1 (PRAX-1). Mammals contain
a third protein, RIM-BP3. RIM-BP1 and RIM-BP2 are
predominantly expressed in the brain where they display
overlapping but distinct expression patterns, while
RIM-BP3 is almost exclusively expressed in the testis
and is essential in spermiogenesis. The SH3 domains of
RIM-BPs bind to the PxxP motifs of RIM1, RIM2, and
L-type (alpha1D) and N-type (alpha1B) calcium channel
subunits. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 61
Score = 39.3 bits (92), Expect = 3e-04
Identities = 18/39 (46%), Positives = 25/39 (64%), Gaps = 1/39 (2%)
Query: 554 ELGFRKNDVITIISQKDEH-CWIGELNGLKGWFPAKFVE 591
EL FR D+IT+ + DE + GELNG +G P+ F+E
Sbjct: 22 ELSFRAGDIITVFGEMDEDGFYYGELNGQRGLVPSNFLE 60
>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 = 38.8 bits (91), Expect = 4e-04
Identities = 14/49 (28%), Positives = 27/49 (55%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
A+ D+E DDE+ ++ +V+ ++ + D W +GW PA ++E
Sbjct: 4 AIADYEAQGDDEISLQEGEVVEVLEKNDSGWWYVRKGDKEGWVPASYLE 52
>gnl|CDD|212867 cd11934, SH3_Lasp1_C, C-terminal Src Homology 3 domain of LIM and
SH3 domain protein 1. Lasp1 is a cytoplasmic protein
that binds focal adhesion proteins and is involved in
cell signaling, migration, and proliferation. It is
overexpressed in several cancer cells including breast,
ovarian, bladder, and liver. In cancer cells, it can be
found in the nucleus; its degree of nuclear localization
correlates with tumor size and poor prognosis. Lasp1 is
a 36kD protein containing an N-terminal LIM domain, two
nebulin repeats, and a C-terminal SH3 domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 39.2 bits (91), Expect = 4e-04
Identities = 19/55 (34%), Positives = 29/55 (52%), Gaps = 2/55 (3%)
Query: 539 RRAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIG--ELNGLKGWFPAKFVE 591
+R +A+ D+ D+DE+ F+ D I + Q D+ G E G G PA +VE
Sbjct: 3 KRYRAVYDYNAADEDEVSFQDGDTIVNVQQIDDGWMYGTVERTGDTGMLPANYVE 57
>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 = 39.2 bits (92), Expect = 4e-04
Identities = 19/59 (32%), Positives = 32/59 (54%), Gaps = 7/59 (11%)
Query: 541 AKALLDFERHDDD-ELGFRKNDVITIISQKD---EHC--WIGEL-NGLKGWFPAKFVEL 592
+AL DF + + EL +K D++ ++S+ D W G +G GWFP+ +VE+
Sbjct: 2 CRALYDFTPENPEMELSLKKGDIVAVLSKTDPLGRDSEWWKGRTRDGRIGWFPSNYVEV 60
>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 = 38.4 bits (89), Expect = 6e-04
Identities = 16/54 (29%), Positives = 27/54 (50%), Gaps = 2/54 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEH--CWIGELNGLKGWFPAKFVE 591
R +A+ D+ + DEL F+ + + + +DE C G G +PA +VE
Sbjct: 3 RVRAVYDYTGQEPDELSFKAGEELLKVEDEDEQGWCKGVTDGGAVGLYPANYVE 56
>gnl|CDD|212889 cd11956, SH3_srGAP4, Src homology 3 domain of Slit-Robo GTPase
Activating Protein 4. srGAP4, also called ARHGAP4, is
highly expressed in hematopoietic cells and may play a
role in lymphocyte differentiation. It is able to
stimulate the GTPase activity of Rac1, Cdc42, and RhoA.
In the nervous system, srGAP4 has been detected in
differentiating neurites and may be involved in axon and
dendritic growth. srGAPs are Rho GAPs that interact with
Robo1, the transmembrane receptor of Slit proteins. Slit
proteins are secreted proteins that control axon
guidance and the migration of neurons and leukocytes.
srGAPs contain an N-terminal F-BAR domain, a Rho GAP
domain, and a C-terminal SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 38.3 bits (89), Expect = 6e-04
Identities = 17/52 (32%), Positives = 28/52 (53%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
A A D+ EL F++ DV+ + S+ W GE NG++G P K++ +
Sbjct: 4 AVACFDYTGRTAQELSFKRGDVLLLHSKASSDWWRGEHNGMRGLIPHKYISV 55
>gnl|CDD|212817 cd11884, SH3_MYO15, Src Homology 3 domain of Myosin XV. This
subfamily is composed of proteins with similarity to
Myosin XVa. Myosin XVa is an unconventional myosin that
is critical for the normal growth of mechanosensory
stereocilia of inner ear hair cells. Mutations in the
myosin XVa gene are associated with nonsyndromic hearing
loss. Myosin XVa contains a unique N-terminal extension
followed by a motor domain, light chain-binding IQ
motifs, and a tail consisting of a pair of MyTH4-FERM
tandems separated by a SH3 domain, and a PDZ domain. SH3
domains bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs;
they play a role in the regulation of enzymes by
intramolecular interactions, changing the subcellular
localization of signal pathway components and mediate
multiprotein complex assemblies.
Length = 56
Score = 38.1 bits (89), Expect = 8e-04
Identities = 17/56 (30%), Positives = 25/56 (44%), Gaps = 7/56 (12%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHC----WI-GELNGLKGWFPAKFVE 591
A+ + D L F K DVI + E W+ G L+G G FP ++V+
Sbjct: 2 VVAVRAYITRDQTLLSFHKGDVIKL--LPKEGPLDPGWLFGTLDGRSGAFPKEYVQ 55
>gnl|CDD|212779 cd11845, SH3_Src_like, Src homology 3 domain of Src kinase-like
Protein Tyrosine Kinases. Src subfamily members include
Src, Lck, Hck, Blk, Lyn, Fgr, Fyn, Yrk, Yes, and Brk.
Src (or c-Src) proteins are cytoplasmic (or
non-receptor) PTKs which are anchored to the plasma
membrane. They contain an N-terminal SH4 domain with a
myristoylation site, followed by SH3 and SH2 domains, a
tyr kinase domain, and a regulatory C-terminal region
containing a conserved tyr. They are activated by
autophosphorylation at the tyr kinase domain, but are
negatively regulated by phosphorylation at the
C-terminal tyr by Csk (C-terminal Src Kinase). However,
Brk lacks the N-terminal myristoylation sites. Src
proteins are involved in signaling pathways that
regulate cytokine and growth factor responses,
cytoskeleton dynamics, cell proliferation, survival, and
differentiation. They were identified as the first
proto-oncogene products, and they regulate cell
adhesion, invasion, and motility in cancer cells, and
tumor vasculature, contributing to cancer progression
and metastasis. Src kinases are overexpressed in a
variety of human cancers, making them attractive targets
for therapy. They are also implicated in acute
inflammatory responses and osteoclast function. Src,
Fyn, Yes, and Yrk are widely expressed, while Blk, Lck,
Hck, Fgr, Lyn, and Brk show a limited expression
pattern. This subfamily also includes Drosophila Src42A,
Src oncogene at 42A (also known as Dsrc41) which
accumulates at sites of cell-cell or cell-matrix
adhesion, and participates in Drosphila development and
wound healing. It has been shown to promote tube
elongation in the tracheal system, is essential for
proper cell-cell matching during dorsal closure, and
regulates cell-cell contacts in developing Drosophila
eyes. The SH3 domain of Src kinases contributes to
substrate recruitment by binding adaptor
proteins/substrates, and regulation of kinase activity
through an intramolecular interaction. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 52
Score = 37.9 bits (89), Expect = 8e-04
Identities = 16/49 (32%), Positives = 26/49 (53%), Gaps = 2/49 (4%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGEL--NGLKGWFPAKF 589
AL D+E DD+L F+K D + I+ D W+ G +G+ P+ +
Sbjct: 4 ALYDYEARTDDDLSFKKGDRLQILDDSDGDWWLARHLSTGKEGYIPSNY 52
>gnl|CDD|212854 cd11921, SH3_Vinexin_1, First Src Homology 3 domain of Vinexin,
also called Sorbin and SH3 domain containing 3 (Sorbs3).
Vinexin is also called Sorbs3, SH3P3, and
SH3-containing adapter molecule 1 (SCAM-1). It is an
adaptor protein containing one sorbin homology (SoHo)
and three SH3 domains. Vinexin was first identified as a
vinculin binding protein; it is co-localized with
vinculin at cell-ECM and cell-cell adhesion sites. There
are several splice variants of vinexin: alpha, which
contains the SoHo and three SH3 domains and displays
tissue-specific expression; and beta, which contains
only the three SH3 domains and is widely expressed.
Vinexin alpha stimulates the accumulation of F-actin at
focal contact sites. Vinexin also promotes keratinocyte
migration and wound healing. The SH3 domains of vinexin
have been reported to bind a number of ligands including
vinculin, WAVE2, DLG5, Abl, and Cbl. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 37.6 bits (87), Expect = 0.001
Identities = 19/55 (34%), Positives = 31/55 (56%)
Query: 539 RRAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVELL 593
+ A+ DF+ EL +K D++ I + D++ GE +G G FPA +VE+L
Sbjct: 1 KAARLKFDFQAQSPKELTLQKGDIVYIHKEVDKNWLEGEHHGRVGIFPANYVEVL 55
>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 = 37.5 bits (87), Expect = 0.001
Identities = 21/56 (37%), Positives = 27/56 (48%), Gaps = 10/56 (17%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHC-----WI-GELNGLKGWFPAKFVE 591
+AL FE + DE+ F D+I Q DE W+ G G GWFP +VE
Sbjct: 5 RALYPFEARNHDEMSFNAGDII----QVDEKTVGEPGWLYGSFQGNFGWFPCNYVE 56
>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 = 37.7 bits (87), Expect = 0.001
Identities = 18/58 (31%), Positives = 29/58 (50%), Gaps = 2/58 (3%)
Query: 539 RRAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGEL--NGLKGWFPAKFVELLD 594
R +A+ D+ D+DE+ FR D I + DE G + G G PA ++E ++
Sbjct: 1 RTYRAMYDYSAQDEDEVSFRDGDYIVNVQPIDEGWMYGTVQRTGRTGMLPANYIEFVN 58
>gnl|CDD|212822 cd11889, SH3_Cyk3p-like, Src Homology 3 domain of Cytokinesis
protein 3 and similar proteins. Cytokinesis protein 3
(Cyk3 or Cyk3p) is a component of the actomyosin ring
independent cytokinesis pathway in yeast. It interacts
with Inn1 and facilitates its recruitment to the bud
neck, thereby promoting cytokinesis. Cyk3p contains an
N-terminal SH3 domain and a C-terminal
transglutaminase-like domain. The Cyk3p SH3 domain binds
to the C-terminal proline-rich region of Inn1. SH3
domains bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs;
they play a role in the regulation of enzymes by
intramolecular interactions, changing the subcellular
localization of signal pathway components and mediate
multiprotein complex assemblies.
Length = 53
Score = 37.5 bits (87), Expect = 0.001
Identities = 19/53 (35%), Positives = 31/53 (58%), Gaps = 2/53 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGEL--NGLKGWFPAKFV 590
+ KA+ + + +LGF + D+I ++S D W G+L NG +G FP+ FV
Sbjct: 1 KVKAVYSWAGETEGDLGFLEGDLIEVLSIGDGSWWSGKLRRNGAEGIFPSNFV 53
>gnl|CDD|212954 cd12021, SH3_p47phox_1, First or N-terminal Src homology 3 domain
of the p47phox subunit of NADPH oxidase, also called
Neutrophil Cytosolic Factor 1. p47phox, or NCF1, is a
cytosolic subunit of the phagocytic NADPH oxidase
complex (also called Nox2 or gp91phox), which plays a
key role in the ability of phagocytes to defend against
bacterial infections. NADPH oxidase catalyzes the
transfer of electrons from NADPH to oxygen during
phagocytosis forming superoxide and reactive oxygen
species. p47phox is required for activation of NADH
oxidase and plays a role in translocation. It contains
an N-terminal Phox homology (PX) domain, tandem SH3
domains (N-SH3 and C-SH3), a polybasic/autoinhibitory
region, and a C-terminal proline-rich region (PRR). This
model characterizes the first SH3 domain (or N-SH3) of
p47phox. In its inactive state, the tandem SH3 domains
interact intramolecularly with the autoinhibitory
region; upon activation, the tandem SH3 domains are
exposed through a conformational change, resulting in
their binding to the PRR of p22phox and the activation
of NADPH oxidase. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 37.2 bits (86), Expect = 0.002
Identities = 13/50 (26%), Positives = 28/50 (56%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
+A+ D+E+ E+ + DV+ ++ + + W +L +GW PA ++E
Sbjct: 3 RAIADYEKSSKSEMALKTGDVVEVVEKSENGWWFCQLKAKRGWVPASYLE 52
>gnl|CDD|212945 cd12012, SH3_RIM-BP_2, Second Src homology 3 domain of
Rab3-interacting molecules (RIMs) binding proteins.
RIMs binding proteins (RBPs, RIM-BPs) associate with
calcium channels present in photoreceptors, neurons, and
hair cells; they interact simultaneously with specific
calcium channel subunits, and active zone proteins, RIM1
and RIM2. RIMs are part of the matrix at the presynaptic
active zone and are associated with synaptic vesicles
through their interaction with the small GTPase Rab3.
RIM-BPs play a role in regulating synaptic transmission
by serving as adaptors and linking calcium channels with
the synaptic vesicle release machinery. RIM-BPs contain
three SH3 domains and two to three fibronectin III
repeats. Invertebrates contain one, while vertebrates
contain at least two RIM-BPs, RIM-BP1 and RIM-BP2.
RIM-BP1 is also called peripheral-type benzodiazapine
receptor associated protein 1 (PRAX-1). Mammals contain
a third protein, RIM-BP3. RIM-BP1 and RIM-BP2 are
predominantly expressed in the brain where they display
overlapping but distinct expression patterns, while
RIM-BP3 is almost exclusively expressed in the testis
and is essential in spermiogenesis. The SH3 domains of
RIM-BPs bind to the PxxP motifs of RIM1, RIM2, and
L-type (alpha1D) and N-type (alpha1B) calcium channel
subunits. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity. They play versatile and diverse roles
in the cell including the regulation of enzymes,
changing the subcellular localization of signaling
pathway components, and mediating the formation of
multiprotein complex assemblies.
Length = 62
Score = 37.3 bits (87), Expect = 0.002
Identities = 13/41 (31%), Positives = 23/41 (56%), Gaps = 1/41 (2%)
Query: 552 DDELGFRKNDVITIISQKDEH-CWIGELNGLKGWFPAKFVE 591
++EL F++ +I + KD ++GE+NG +G P V
Sbjct: 21 EEELPFKEGQLIKVYGDKDADGFYLGEINGRRGLVPCNMVS 61
>gnl|CDD|212919 cd11986, SH3_Stac3_1, First C-terminal Src homology 3 domain of SH3
and cysteine-rich domain-containing protein 3 (Stac3).
Stac proteins are putative adaptor proteins that contain
a cysteine-rich C1 domain and one or two SH3 domains at
the C-terminus. There are three mammalian members
(Stac1, Stac2, and Stac3) of this family. Stac1 and
Stac3 contain two SH3 domains while Stac2 contains a
single SH3 domain at the C-terminus. Stac1 and Stac2
have been found to be expressed differently in mature
dorsal root ganglia (DRG) neurons. Stac1 is mainly
expressed in peptidergic neurons while Stac2 is found in
a subset of nonpeptidergic and all trkB+ neurons. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 36.8 bits (85), Expect = 0.002
Identities = 16/48 (33%), Positives = 26/48 (54%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
AL F+ + D+L F + IT+I +E W G++ G+FP F+
Sbjct: 4 ALYRFKALEKDDLDFHPGERITVIDDSNEEWWRGKIGEKTGYFPMNFI 51
>gnl|CDD|212816 cd11883, SH3_Sdc25, Src Homology 3 domain of Sdc25/Cdc25 guanine
nucleotide exchange factors. This subfamily is composed
of the Saccharomyces cerevisiae guanine nucleotide
exchange factors (GEFs) Sdc25 and Cdc25, and similar
proteins. These GEFs regulate Ras by stimulating the
GDP/GTP exchange on Ras. Cdc25 is involved in the
Ras/PKA pathway that plays an important role in the
regulation of metabolism, stress responses, and
proliferation, depending on available nutrients and
conditions. Proteins in this subfamily contain an
N-terminal SH3 domain as well as REM (Ras exchanger
motif) and RasGEF domains at the C-terminus. SH3 domains
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs; they play a
role in the regulation of enzymes by intramolecular
interactions, changing the subcellular localization of
signal pathway components and mediate multiprotein
complex assemblies.
Length = 55
Score = 36.9 bits (86), Expect = 0.002
Identities = 14/52 (26%), Positives = 26/52 (50%), Gaps = 5/52 (9%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNG-----LKGWFPAKF 589
AL DF ++L F+ D+I ++++ W G + +GWFP+ +
Sbjct: 4 ALYDFTPKSKNQLSFKAGDIIYVLNKDPSGWWDGVIISSSGKVKRGWFPSNY 55
>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 = 37.3 bits (86), Expect = 0.002
Identities = 19/56 (33%), Positives = 31/56 (55%), Gaps = 3/56 (5%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHC---WIGELNGLKGWFPAKFVELL 593
AKAL D DEL FRK D++T++ + + W+ L+G +G P +++L
Sbjct: 5 AKALYDNVAESPDELSFRKGDIMTVLERDTQGLDGWWLCSLHGRQGIVPGNRLKIL 60
>gnl|CDD|212792 cd11858, SH3_Myosin-I_fungi, Src homology 3 domain of Type I fungal
Myosins. Type I myosins (myosin-I) are actin-dependent
motors in endocytic actin structures and actin patches.
They play roles in membrane traffic in endocytic and
secretory pathways, cell motility, and mechanosensing.
Saccharomyces cerevisiae has two myosins-I, Myo3 and
Myo5, which are involved in endocytosis and the
polarization of the actin cytoskeleton. Myosin-I
contains an N-terminal actin-activated ATPase, a
phospholipid-binding TH1 (tail homology 1) domain, and a
C-terminal extension which includes an F-actin-binding
TH2 domain, an SH3 domain, and an acidic peptide that
participates in activating the Arp2/3complex. The SH3
domain of myosin-I is required for myosin-I-induced
actin polymerization. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 37.0 bits (86), Expect = 0.002
Identities = 17/55 (30%), Positives = 30/55 (54%), Gaps = 2/55 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGL--KGWFPAKFVEL 592
KAL DF +EL +K+D++ I+ ++D W+ + +GW PA ++E
Sbjct: 1 TYKALYDFAGSVANELSLKKDDIVYIVQKEDNGWWLAKKLDESKEGWVPAAYLEE 55
>gnl|CDD|212900 cd11967, SH3_SASH1, Src homology 3 domain of SAM And SH3 Domain
Containing Protein 1. SASH1 is a potential tumor
suppressor in breast and colon cancer. Its decreased
expression is associated with aggressive tumor growth,
metastasis, and poor prognosis. It is widely expressed
in normal tissues (except lymphocytes and dendritic
cells) and is localized in the nucleus and the
cytoplasm. SASH1 interacts with the oncoprotein
cortactin and is important in cell migration and
adhesion. It is a member of the SLY family of proteins,
which are adaptor proteins containing a central
conserved region with a bipartite nuclear localization
signal (NLS) as well as SAM (sterile alpha motif) and
SH3 domains. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 36.9 bits (85), Expect = 0.002
Identities = 21/56 (37%), Positives = 30/56 (53%), Gaps = 2/56 (3%)
Query: 540 RAKALLDF--ERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVELL 593
RA+ DF +D D L +K D+I IIS+ W+G LN G F +V++L
Sbjct: 2 RARVHTDFTPSPYDTDSLKLKKGDIIDIISKPPMGTWMGLLNNKVGTFKFIYVDVL 57
>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 = 36.9 bits (86), Expect = 0.002
Identities = 19/56 (33%), Positives = 29/56 (51%), Gaps = 3/56 (5%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQ---KDEHCWIGELNGLKGWFPAKFVEL 592
A+AL D DEL FR+ D++T++ Q E W+ L G +G P ++L
Sbjct: 1 LARALYDNVAESPDELAFRRGDILTVLEQNTAGLEGWWLCSLRGRQGIAPGNRLKL 56
>gnl|CDD|212866 cd11933, SH3_Nebulin_C, C-terminal Src Homology 3 domain of
Nebulin. Nebulin is a giant filamentous protein
(600-900 kD) that is expressed abundantly in skeletal
muscle. It binds to actin thin filaments and regulates
its assembly and function. Nebulin was thought to be
part of a molecular ruler complex that is critical in
determining the lengths of actin thin filaments in
skeletal muscle since its length, which varies due to
alternative splicing, correlates with the length of thin
filaments in various muscle types. Recent studies
indicate that nebulin regulates thin filament length by
stabilizing the filaments and preventing
depolymerization. Mutations in nebulin can cause
nemaline myopathy, characterized by muscle weakness
which can be severe and can lead to neonatal lethality.
Nebulin contains an N-terminal LIM domain, many nebulin
repeats/super repeats, and a C-terminal SH3 domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 36.5 bits (84), Expect = 0.003
Identities = 18/52 (34%), Positives = 26/52 (50%), Gaps = 2/52 (3%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELN--GLKGWFPAKFVE 591
+A+ D+ DDDE+ F+ D I + DE G + G G PA +VE
Sbjct: 5 RAMYDYRAADDDEVSFKDGDTIVNVQTIDEGWMYGTVQRTGKTGMLPANYVE 56
>gnl|CDD|212924 cd11991, SH3_Intersectin1_3, Third Src homology 3 domain (or SH3C)
of Intersectin-1. Intersectin-1 (ITSN1) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN1 localizes in membranous organelles, CCPs, the
Golgi complex, and may be involved in the cell membrane
trafficking system. It exists in alternatively spliced
short and long isoforms. The short isoform contains two
Eps15 homology domains (EH1 and EH2), a coiled-coil
region and five SH3 domains (SH3A-E), while the long
isoform, in addition, contains RhoGEF (also called
Dbl-homologous or DH), Pleckstrin homology (PH) and C2
domains. The third SH3 domain (or SH3C) of ITSN1 has
been shown to bind many proteins including dynamin1/2,
CIN85, c-Cbl, SHIP2, Reps1, synaptojanin-1, and WNK,
among others. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 52
Score = 36.1 bits (83), Expect = 0.004
Identities = 15/50 (30%), Positives = 27/50 (54%), Gaps = 1/50 (2%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
A+ +E ++ +L F++ DVI + +KD W G + G FP+ +V
Sbjct: 4 AMYTYESNEQGDLTFQQGDVILVT-KKDGDWWTGTVGDKTGVFPSNYVRP 52
>gnl|CDD|212886 cd11953, SH3_ASPP2, Src Homology 3 (SH3) domain of Apoptosis
Stimulating of p53 protein 2. ASPP2 is the full length
form of the previously-identified tumor supressor,
p53-binding protein 2 (p53BP2). ASPP2 activates the
apoptotic function of the p53 family of tumor
suppressors (p53, p63, and p73). It plays a central role
in regulating apoptosis and cell growth; ASPP2-deficient
mice show postnatal death. Downregulated expression of
ASPP2 is frequently found in breast tumors, lung cancer,
and diffuse large B-cell lymphoma where it is correlated
with a poor clinical outcome. ASPP2 contains a
proline-rich region, four ankyrin (ANK) repeats, and an
SH3 domain at its C-terminal half. The SH3 domain and
the ANK repeats of ASPP2 contribute to the p53 binding
site; they bind to the DNA binding domain of p53. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 36.1 bits (83), Expect = 0.004
Identities = 20/53 (37%), Positives = 30/53 (56%), Gaps = 3/53 (5%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDE---HCWIGELNGLKGWFPAKFVEL 592
AL D+E DDEL F++ D +TI+ ++DE W LN +G+ P + L
Sbjct: 5 ALWDYEGESDDELSFKEGDCMTILRREDEDETEWWWARLNDKEGYVPRNLLGL 57
>gnl|CDD|212863 cd11930, SH3_SH3RF1_2, Second Src Homology 3 domain of SH3 domain
containing ring finger protein 1, an E3
ubiquitin-protein ligase. SH3RF1 is also called POSH
(Plenty of SH3s) or SH3MD2 (SH3 multiple domains protein
2). It is a scaffold protein that acts as an E3
ubiquitin-protein ligase. It plays a role in calcium
homeostasis through the control of the ubiquitin domain
protein Herp. It may also have a role in regulating
death receptor mediated and JNK mediated apoptosis.
SH3RF1 also enhances the ubiquitination of ROMK1
potassium channel resulting in its increased
endocytosis. It contains an N-terminal RING finger
domain and four SH3 domains. This model represents the
second SH3 domain, located C-terminal of the first SH3
domain at the N-terminal half, of SH3RF1. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 36.1 bits (83), Expect = 0.004
Identities = 22/55 (40%), Positives = 30/55 (54%), Gaps = 4/55 (7%)
Query: 540 RAKALLDFE----RHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
+ KAL DFE D D L F K+D++T+I + DE+ G L G FP +V
Sbjct: 1 QCKALYDFEVKDKEADKDCLPFAKDDILTVIRRVDENWAEGMLGDKIGIFPISYV 55
>gnl|CDD|212799 cd11865, SH3_Nbp2-like, Src Homology 3 domain of Saccharomyces
cerevisiae Nap1-binding protein 2 and similar fungal
proteins. This subfamily includes Saccharomyces
cerevisiae Nbp2 (Nucleosome assembly protein 1
(Nap1)-binding protein 2), Schizosaccharomyces pombe
Skb5, and similar proteins. Nbp2 interacts with Nap1,
which is essential for maintaining proper nucleosome
structures in transcription and replication. It is also
the binding partner of the yeast type II protein
phosphatase Ptc1p and serves as a scaffolding protein
that brings seven kinases in close contact to Ptc1p.
Nbp2 plays a role many cell processes including
organelle inheritance, mating hormone response, cell
wall stress, mitotic cell growth at elevated
temperatures, and high osmolarity. Skb5 interacts with
the p21-activated kinase (PAK) homolog Shk1, which is
critical for fission yeast cell viability. Skb5
activates Shk1 and plays a role in regulating cell
morphology and growth under hypertonic conditions. Nbp2
and Skb5 contain an SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 36.0 bits (83), Expect = 0.004
Identities = 20/55 (36%), Positives = 28/55 (50%), Gaps = 2/55 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIG--ELNGLKGWFPAKFVEL 592
RA AL DFE D+ELGF + ++ I+ + + I E G G P +FV
Sbjct: 1 RAVALYDFEPEHDNELGFAEGQILFILYKHGQGWLIAEDESGGKTGLVPEEFVSY 55
>gnl|CDD|212756 cd11822, SH3_SASH_like, Src homology 3 domain of SAM And SH3 Domain
Containing Proteins. This subfamily, also called the
SLY family, is composed of SAM And SH3 Domain Containing
Protein 1 (SASH1), SASH2, SASH3, and similar proteins.
These are adaptor proteins containing a central
conserved region with a bipartite nuclear localization
signal (NLS) as wells as SAM (sterile alpha motif) and
SH3 domains. SASH1 is a potential tumor suppressor in
breast and colon cancer. It is widely expressed in
normal tissues (except lymphocytes and dendritic cells)
and is localized in the nucleus and the cytoplasm. SASH1
interacts with the oncoprotein cortactin and is
important in cell migration and adhesion. SASH2 (also
called SAMSN-1, SLY2, HACS1 or NASH1) and SASH3 (also
called SLY/SLY1) are expressed mainly in hematopoietic
cells, although SASH2 is also found in endothelial cells
as well as myeloid leukemias and myeloma. SASH2 was
found to be differentially expressed in malignant
haematopoietic cells and in colorectal tumors, and is a
potential tumor suppressor in lung cancer. SASH3 is
essential in the full activation of adaptive immunity
and is involved in the signaling of T cell receptors.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 35.6 bits (82), Expect = 0.005
Identities = 21/53 (39%), Positives = 27/53 (50%), Gaps = 4/53 (7%)
Query: 540 RAKALLDF--ERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
RAK DF +D D L +K D+I II++ W G LN G F KF+
Sbjct: 1 RAKVHTDFTPSPYDTDSLKLKKGDIIDIINKPPMGIWTGMLNNKVGNF--KFI 51
>gnl|CDD|212977 cd12044, SH3_SKAP1, Src Homology 3 domain of Src Kinase-Associated
Phosphoprotein 1. SKAP1, also called SKAP55 (Src
kinase-associated protein of 55kDa), is an immune
cell-specific adaptor protein that plays an important
role in T-cell adhesion, migration, and integrin
clustering. It is expressed exclusively in
T-lymphocytes, mast cells, and macrophages. Binding
partners include ADAP (adhesion and
degranulation-promoting adaptor protein), Fyn, Riam,
RapL, and RasGRP. It contains a pleckstrin homology (PH)
domain, a C-terminal SH3 domain, and several tyrosine
phosphorylation sites. The SH3 domain of SKAP1 is
necessary for its ability to regulate T-cell conjugation
with antigen-presenting cells and the formation of LFA-1
clusters. SKAP1 binds primarily to a proline-rich region
of ADAP through its SH3 domain; its degradation is
regulated by ADAP. A secondary interaction occurs via
the ADAP SH3 domain and the RKxxYxxY motif in SKAP1. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 36.0 bits (83), Expect = 0.005
Identities = 19/52 (36%), Positives = 31/52 (59%), Gaps = 4/52 (7%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHC---WIGELNGLKGWFPAKFV 590
+ L D + DEL F++ D+I I+S K+ + W+GELNG+ G P ++
Sbjct: 3 QGLWDCFGDNPDELSFQRGDLIYILS-KEYNMYGWWVGELNGIVGIVPKDYL 53
>gnl|CDD|212997 cd12064, SH3_GRAF, Src Homology 3 domain of GTPase Regulator
Associated with Focal adhesion kinase. GRAF, also
called Rho GTPase activating protein 26 (ARHGAP26),
Oligophrenin-1-like (OPHN1L) or GRAF1, is a GAP with
activity towards RhoA and Cdc42 and is only weakly
active towards Rac1. It influences Rho-mediated
cytoskeletal rearrangements and binds focal adhesion
kinase (FAK), which is a critical component of integrin
signaling. It is essential for the major
clathrin-independent endocytic pathway mediated by
pleiomorphic membranes. GRAF contains an N-terminal BAR
domain, followed by a Pleckstrin homology (PH) domain, a
Rho GAP domain, and a C-terminal SH3 domain. The SH3
domain of GRAF binds PKNbeta, a target of the small
GTPase Rho. SH3 domains bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs; they play a role in the regulation of
enzymes by intramolecular interactions, changing the
subcellular localization of signal pathway components
and mediate multiprotein complex assemblies.
Length = 56
Score = 35.9 bits (82), Expect = 0.005
Identities = 21/56 (37%), Positives = 26/56 (46%), Gaps = 1/56 (1%)
Query: 539 RRAKALLDFERHDDDELGFRKNDVITIISQKDEHCWI-GELNGLKGWFPAKFVELL 593
R+AKAL + D EL F V + E W+ G LNG G P +VE L
Sbjct: 1 RKAKALYACKAEHDSELSFTAGTVFDNVHPSQEPGWLEGTLNGKTGLIPENYVEFL 56
>gnl|CDD|212829 cd11896, SH3_SNX33, Src Homology 3 domain of Sorting Nexin 33.
SNX33 interacts with Wiskott-Aldrich syndrome protein
(WASP) and plays a role in the maintenance of cell shape
and cell cycle progression. It modulates the shedding
and endocytosis of cellular prion protein (PrP(c)) and
amyloid precursor protein (APP). SNXs are Phox homology
(PX) domain containing proteins that are involved in
regulating membrane traffic and protein sorting in the
endosomal system. SNX33 also contains BAR and SH3
domains. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 35.7 bits (82), Expect = 0.005
Identities = 17/55 (30%), Positives = 31/55 (56%), Gaps = 2/55 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELN--GLKGWFPAKFVEL 592
+A+AL F+ + +E+ ++N+ + I S+ W+ N G G FPA +VE+
Sbjct: 1 KARALYSFQSENKEEINIQENEELVIFSENSLDGWLQGQNSRGETGLFPASYVEI 55
>gnl|CDD|212835 cd11902, SH3_Nck2_2, Second Src Homology 3 domain of Nck2 adaptor
protein. Nck2 (also called Nckbeta or Growth factor
receptor-bound protein 4, Grb4) plays a crucial role in
connecting signaling pathways of tyrosine kinase
receptors and important effectors in actin dynamics and
cytoskeletal remodeling. It binds neuronal signaling
proteins such as ephrinB and Disabled-1 (Dab-1)
exclusively. Nck adaptor proteins regulate actin
cytoskeleton dynamics by linking proline-rich effector
molecules to protein tyrosine kinases and phosphorylated
signaling intermediates. They contain three SH3 domains
and a C-terminal SH2 domain. They function downstream of
the PDGFbeta receptor and are involved in Rho GTPase
signaling and actin dynamics. Vertebrates contain two
Nck adaptor proteins: Nck1 (also called Nckalpha) and
Nck2, which show partly overlapping functions but also
bind distinct targets. The second SH3 domain of Nck
appears to prefer ligands containing the APxxPxR motif.
SH3 domains are protein interaction domains that usually
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially a PxxP motif. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 35.7 bits (82), Expect = 0.005
Identities = 14/39 (35%), Positives = 22/39 (56%)
Query: 552 DDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
+DEL K +T++ + + W G NG GWFP+ +V
Sbjct: 14 EDELSLVKGSRVTVMEKCSDGWWRGSYNGQIGWFPSNYV 52
>gnl|CDD|212864 cd11931, SH3_SH3RF3_2, Second Src Homology 3 domain of SH3 domain
containing ring finger 3, an E3 ubiquitin-protein
ligase. SH3RF3 is also called POSH2 (Plenty of SH3s 2)
or SH3MD4 (SH3 multiple domains protein 4). It is a
scaffold protein with E3 ubiquitin-protein ligase
activity. It was identified in the screen for
interacting partners of p21-activated kinase 2 (PAK2).
It may play a role in regulating JNK mediated apoptosis
in certain conditions. It also interacts with GTP-loaded
Rac1. SH3RF3 is highly homologous to SH3RF1; it also
contains an N-terminal RING finger domain and four SH3
domains. This model represents the second SH3 domain,
located C-terminal of the first SH3 domain at the
N-terminal half, of SH3RF3. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 35.7 bits (82), Expect = 0.005
Identities = 21/55 (38%), Positives = 31/55 (56%), Gaps = 4/55 (7%)
Query: 540 RAKALLDFERHDDDE----LGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
+ KAL DFE D D+ L F K++++T+I + DE+ G L G FP +V
Sbjct: 1 QGKALYDFEIKDKDQDKDCLTFTKDEILTVIRRVDENWAEGMLGDKIGIFPILYV 55
>gnl|CDD|212901 cd11968, SH3_SASH3, Src homology 3 domain of Sam And SH3 Domain
Containing Protein 3. SASH3, also called SLY/SLY1
(SH3-domain containing protein expressed in
lymphocytes), is expressed exclusively in lymhocytes and
is essential in the full activation of adaptive
immunity. It is involved in the signaling of T cell
receptors. It was the first described member of the SLY
family of proteins, which are adaptor proteins
containing a central conserved region with a bipartite
nuclear localization signal (NLS) as well as SAM
(sterile alpha motif) and SH3 domains. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 35.6 bits (82), Expect = 0.007
Identities = 19/55 (34%), Positives = 27/55 (49%), Gaps = 2/55 (3%)
Query: 540 RAKALLDF--ERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
RA+ DF +D D L +K D+I II + W G LN G F +V++
Sbjct: 2 RARVHTDFIPSPYDGDSLKLQKGDIIQIIEKPPVGTWTGLLNNKVGTFKFIYVDV 56
>gnl|CDD|212773 cd11839, SH3_Intersectin_4, Fourth Src homology 3 domain (or SH3D)
of Intersectin. Intersectins (ITSNs) are adaptor
proteins that function in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction.
They are essential for initiating clathrin-coated pit
formation. They bind to many proteins through their
multidomain structure and facilitate the assembly of
multimeric complexes. Vertebrates contain two ITSN
proteins, ITSN1 and ITSN2, which exist in alternatively
spliced short and long isoforms. The short isoforms
contain two Eps15 homology domains (EH1 and EH2), a
coiled-coil region and five SH3 domains (SH3A-E), while
the long isoforms, in addition, contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin homology (PH)
and C2 domains. ITSN1 and ITSN2 are both widely
expressed, with variations depending on tissue type and
stage of development. The fourth SH3 domain (or SH3D) of
ITSN1 has been shown to bind SHIP2, Numb, CdGAP, and
N-WASP. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 35.4 bits (82), Expect = 0.007
Identities = 16/57 (28%), Positives = 27/57 (47%), Gaps = 5/57 (8%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGEL--NGLK---GWFPAKFVEL 592
A+ + F +++L ++ + + W GEL G K GWFPA +V+L
Sbjct: 2 AQVIAPFTATAENQLSLAVGQLVLVRKKSPSGWWEGELQARGKKRQIGWFPANYVKL 58
>gnl|CDD|212800 cd11866, SH3_SKAP1-like, Src Homology 3 domain of Src
Kinase-Associated Phosphoprotein 1 and similar proteins.
This subfamily is composed of SKAP1, SKAP2, and similar
proteins. SKAP1 and SKAP2 are immune cell-specific
adaptor proteins that play roles in T- and B-cell
adhesion, respectively, and are thus important in the
migration of T- and B-cells to sites of inflammation and
for movement during T-cell conjugation with
antigen-presenting cells. Both SKAP1 and SKAP2 bind to
ADAP (adhesion and degranulation-promoting adaptor
protein), among many other binding partners. They
contain a pleckstrin homology (PH) domain, a C-terminal
SH3 domain, and several tyrosine phosphorylation sites.
The SH3 domain of SKAP1 is necessary for its ability to
regulate T-cell conjugation with antigen-presenting
cells and the formation of LFA-1 clusters. SKAP1 binds
primarily to a proline-rich region of ADAP through its
SH3 domain; its degradation is regulated by ADAP. A
secondary interaction occurs via the ADAP SH3 domain and
the RKxxYxxY motif in SKAP1. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 35.1 bits (81), Expect = 0.007
Identities = 19/50 (38%), Positives = 30/50 (60%), Gaps = 2/50 (4%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDE--HCWIGELNGLKGWFPAKFV 590
L D ++ DEL F++ D+I IIS++ + W+GELNG G P ++
Sbjct: 4 GLWDCSGNEPDELSFKRGDLIYIISKEYDSFGWWVGELNGKVGLVPKDYL 53
>gnl|CDD|212772 cd11838, SH3_Intersectin_3, Third Src homology 3 domain (or SH3C)
of Intersectin. Intersectins (ITSNs) are adaptor
proteins that function in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction.
They are essential for initiating clathrin-coated pit
formation. They bind to many proteins through their
multidomain structure and facilitate the assembly of
multimeric complexes. Vertebrates contain two ITSN
proteins, ITSN1 and ITSN2, which exist in alternatively
spliced short and long isoforms. The short isoforms
contain two Eps15 homology domains (EH1 and EH2), a
coiled-coil region and five SH3 domains (SH3A-E), while
the long isoforms, in addition, contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin homology (PH)
and C2 domains. ITSN1 and ITSN2 are both widely
expressed, with variations depending on tissue type and
stage of development. The third SH3 domain (or SH3C) of
ITSN1 has been shown to bind many proteins including
dynamin1/2, CIN85, c-Cbl, SHIP2, Reps1, synaptojanin-1,
and WNK, among others. The SH3C of ITSN2 has been shown
to bind the K15 protein of Kaposi's sarcoma-associated
herpesvirus. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 35.1 bits (81), Expect = 0.008
Identities = 16/50 (32%), Positives = 25/50 (50%), Gaps = 1/50 (2%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVEL 592
AL +E ++ +L F DVI + +KD W G + G FP+ +V
Sbjct: 4 ALYPYESNEPGDLTFNAGDVILVT-KKDGEWWTGTIGDRTGIFPSNYVRP 52
>gnl|CDD|212857 cd11924, SH3_Vinexin_2, Second Src Homology 3 domain of Vinexin,
also called Sorbin and SH3 domain containing 3 (Sorbs3).
Vinexin is also called Sorbs3, SH3P3, and
SH3-containing adapter molecule 1 (SCAM-1). It is an
adaptor protein containing one sorbin homology (SoHo)
and three SH3 domains. Vinexin was first identified as a
vinculin binding protein; it is co-localized with
vinculin at cell-ECM and cell-cell adhesion sites. There
are several splice variants of vinexin: alpha, which
contains the SoHo and three SH3 domains and displays
tissue-specific expression; and beta, which contains
only the three SH3 domains and is widely expressed.
Vinexin alpha stimulates the accumulation of F-actin at
focal contact sites. Vinexin also promotes keratinocyte
migration and wound healing. The SH3 domains of vinexin
have been reported to bind a number of ligands including
vinculin, WAVE2, DLG5, Abl, and Cbl. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 35.3 bits (81), Expect = 0.009
Identities = 15/41 (36%), Positives = 26/41 (63%), Gaps = 2/41 (4%)
Query: 554 ELGFRKNDVITIISQKDEHCWIGELNGL--KGWFPAKFVEL 592
EL FRK + I +I + +E+ + G + G +G FPA +V++
Sbjct: 16 ELSFRKGEHICLIRKVNENWYEGRITGTGRQGIFPASYVQV 56
>gnl|CDD|212834 cd11901, SH3_Nck1_2, Second Src Homology 3 domain of Nck1 adaptor
protein. Nck1 (also called Nckalpha) plays a crucial
role in connecting signaling pathways of tyrosine kinase
receptors and important effectors in actin dynamics and
cytoskeletal remodeling. It binds and activates RasGAP,
resulting in the downregulation of Ras. It is also
involved in the signaling of endothilin-mediated
inhibition of cell migration. Nck adaptor proteins
regulate actin cytoskeleton dynamics by linking
proline-rich effector molecules to protein tyrosine
kinases and phosphorylated signaling intermediates. They
contain three SH3 domains and a C-terminal SH2 domain.
They function downstream of the PDGFbeta receptor and
are involved in Rho GTPase signaling and actin dynamics.
Vertebrates contain two Nck adaptor proteins: Nck1 (also
called Nckalpha) and Nck2, which show partly overlapping
functions but also bind distinct targets. The second SH3
domain of Nck appears to prefer ligands containing the
APxxPxR motif. SH3 domains are protein interaction
domains that usually bind to proline-rich ligands with
moderate affinity and selectivity, preferentially a PxxP
motif. They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 35.0 bits (80), Expect = 0.009
Identities = 13/39 (33%), Positives = 21/39 (53%)
Query: 552 DDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
+DEL K + ++ + + W G NG GWFP+ +V
Sbjct: 15 EDELSLVKGTKVIVMEKCSDGWWRGSYNGQVGWFPSNYV 53
>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 = 35.3 bits (81), Expect = 0.010
Identities = 19/58 (32%), Positives = 30/58 (51%), Gaps = 3/58 (5%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHC---WIGELNGLKGWFPAKFVELLDE 595
AKAL D +EL FR+ DV+ ++ ++ W+ L+G +G PA + LL
Sbjct: 3 AKALYDNAAESPEELSFRRGDVLMVLKREHGSLPGWWLCSLHGQQGIAPANRLRLLPT 60
>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 = 34.7 bits (80), Expect = 0.010
Identities = 13/47 (27%), Positives = 22/47 (46%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFP 586
+AL D +L FRK D++ +I++ D+ + KG P
Sbjct: 1 VVRALCHHVATDSGQLSFRKGDILRVIARVDDDWLLCTRGSTKGLVP 47
>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 = 34.9 bits (80), Expect = 0.011
Identities = 20/55 (36%), Positives = 31/55 (56%), Gaps = 3/55 (5%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQK---DEHCWIGELNGLKGWFPAKFVEL 592
A+AL D + DEL FR+ D++T++ Q E W L+G +G PA ++L
Sbjct: 3 ARALYDNKADCSDELAFRRGDILTVLEQNVPGSEGWWKCLLHGRQGLAPANRLQL 57
>gnl|CDD|212855 cd11922, SH3_Sorbs1_2, Second Src Homology 3 domain of Sorbin and
SH3 domain containing 1 (Sorbs1), also called ponsin.
Sorbs1 is also called ponsin, SH3P12, or CAP (c-Cbl
associated protein). It is an adaptor protein containing
one sorbin homology (SoHo) and three SH3 domains. It
binds Cbl and plays a major role in regulating the
insulin signaling pathway by enhancing insulin-induced
phosphorylation of Cbl. Sorbs1, like vinexin, localizes
at cell-ECM and cell-cell adhesion sites where it binds
vinculin, paxillin, and afadin. It may function in the
control of cell motility. Other interaction partners of
Sorbs1 include c-Abl, Sos, flotillin, Grb4, ataxin-7,
filamin C, among others. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 58
Score = 35.0 bits (80), Expect = 0.011
Identities = 18/55 (32%), Positives = 31/55 (56%), Gaps = 2/55 (3%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGL--KGWFPAKFVELL 593
A A +F E+ FRK + IT++ Q DE+ + G + G +G FP +V+++
Sbjct: 3 AIAKFNFNGDTQVEMSFRKGERITLLRQVDENWYEGRIPGTSRQGIFPITYVDVI 57
>gnl|CDD|212742 cd11808, SH3_Alpha_Spectrin, Src homology 3 domain of Alpha
Spectrin. Spectrin is a major structural component of
the red blood cell membrane skeleton and is important in
erythropoiesis and membrane biogenesis. It is a
flexible, rope-like molecule composed of two subunits,
alpha and beta, which consist of many spectrin-type
repeats. Alpha and beta spectrin associate to form
heterodimers and tetramers; spectrin tetramer formation
is critical for red cell shape and deformability.
Defects in alpha spectrin have been associated with
inherited hemolytic anemias including hereditary
spherocytosis (HSp), hereditary elliptocytosis (HE), and
hereditary pyropoikilocytosis (HPP). Alpha spectrin
contains a middle SH3 domain and a C-terminal EF-hand
binding motif in addition to multiple spectrin repeats.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 34.8 bits (80), Expect = 0.011
Identities = 14/50 (28%), Positives = 30/50 (60%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
AL D++ E+ +K D++T+++ ++ W E+N +G+ PA +V+
Sbjct: 3 VALYDYQEKSPREVSMKKGDILTLLNSSNKDWWKVEVNDRQGFVPAAYVK 52
>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 = 34.9 bits (81), Expect = 0.011
Identities = 14/55 (25%), Positives = 27/55 (49%), Gaps = 2/55 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCW--IGELNGLKGWFPAKFVEL 592
AK L D+ DDE+ + + +T++ D W + +G +G P ++E+
Sbjct: 1 TAKVLYDYTASGDDEVSISEGEEVTVLEPDDGSGWTKVRNGSGEEGLVPTSYIEI 55
>gnl|CDD|212865 cd11932, SH3_SH3RF2_2, Second Src Homology 3 domain of SH3 domain
containing ring finger 2. SH3RF2 is also called POSHER
(POSH-eliminating RING protein) or HEPP1 (heart protein
phosphatase 1-binding protein). It acts as an
anti-apoptotic regulator of the JNK pathway by binding
to and promoting the degradation of SH3RF1 (or POSH), a
scaffold protein that is required for pro-apoptotic JNK
activation. It may also play a role in cardiac functions
together with protein phosphatase 1. SH3RF2 contains an
N-terminal RING finger domain and three SH3 domains.
This model represents the second SH3 domain, located
C-terminal of the first SH3 domain at the N-terminal
half, of SH3RF2. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 34.8 bits (80), Expect = 0.012
Identities = 21/55 (38%), Positives = 31/55 (56%), Gaps = 6/55 (10%)
Query: 542 KALLDFE------RHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
+AL +F+ D L F+K+D+IT+IS+ DE+ G+L G FP FV
Sbjct: 3 RALYNFDLKEKNREESKDCLKFQKDDIITVISRVDENWAEGKLGDQVGIFPILFV 57
>gnl|CDD|213010 cd12077, SH3_Tks5_2, Second Src homology 3 domain of Tyrosine
kinase substrate with five SH3 domains. Tks5, also
called SH3 and PX domain-containing protein 2A
(SH3PXD2A) or Five SH (FISH), is a scaffolding protein
and Src substrate that is localized in podosomes, which
are electron-dense structures found in Src-transformed
fibroblasts, osteoclasts, macrophages, and some invasive
cancer cells. It binds and regulates some members of the
ADAMs family of transmembrane metalloproteases, which
function as sheddases and mediators of cell and matrix
interactions. It is required for podosome formation,
degradation of the extracellular matrix, and cancer cell
invasion. Tks5 contains an N-terminal Phox homology (PX)
domain and five SH3 domains. This model characterizes
the second SH3 domain of Tks5. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 34.2 bits (78), Expect = 0.017
Identities = 13/39 (33%), Positives = 21/39 (53%)
Query: 553 DELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
DE+GF K + +I + E W G +GW PA +++
Sbjct: 15 DEIGFEKGVTVEVIQKNLEGWWYIRYLGKEGWAPASYLK 53
>gnl|CDD|212847 cd11914, SH3_BAIAP2L2, Src Homology 3 domain of Brain-specific
Angiogenesis Inhibitor 1-Associated Protein 2-Like 2.
BAIAP2L2 co-localizes with clathrin plaques but its
function has not been determined. It contains an
N-terminal IMD or Inverse-Bin/Amphiphysin/Rvs (I-BAR)
domain, an SH3 domain, and a WASP homology 2 (WH2)
actin-binding motif at the C-terminus. The related
proteins, BAIAP2L1 and IRSp53, function as regulators of
membrane dynamics and the actin cytoskeleton. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in 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 = 34.4 bits (79), Expect = 0.017
Identities = 15/42 (35%), Positives = 26/42 (61%), Gaps = 3/42 (7%)
Query: 555 LGFRKNDVITIISQKDEHCWI-GELNGL--KGWFPAKFVELL 593
L F + D+IT++ + + W+ G+L G +GWFP +V+ L
Sbjct: 18 LRFNRGDIITVLVPEARNGWLYGKLEGSSRQGWFPEAYVKAL 59
>gnl|CDD|212841 cd11908, SH3_ITK, Src Homology 3 domain of Interleukin-2-inducible
T-cell Kinase. ITK (also known as Tsk or Emt) is a
cytoplasmic (or nonreceptor) tyr kinase containing Src
homology protein interaction domains (SH3, SH2)
N-terminal to the catalytic tyr kinase domain. It also
contains an N-terminal pleckstrin homology (PH) domain,
which binds the products of PI3K and allows membrane
recruitment and activation, and the Tec homology (TH)
domain, which contains proline-rich and zinc-binding
regions. ITK is expressed in T-cells and mast cells, and
is important in their development and differentiation.
Of the three Tec kinases expressed in T-cells, ITK plays
the predominant role in T-cell receptor (TCR) signaling.
It is activated by phosphorylation upon TCR crosslinking
and is involved in the pathway resulting in
phospholipase C-gamma1 activation and actin
polymerization. It also plays a role in the downstream
signaling of the T-cell costimulatory receptor CD28, the
T-cell surface receptor CD2, and the chemokine receptor
CXCR4. In addition, ITK is crucial for the development
of T-helper(Th)2 effector responses. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 34.2 bits (78), Expect = 0.022
Identities = 14/49 (28%), Positives = 28/49 (57%), Gaps = 1/49 (2%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCW-IGELNGLKGWFPAKFV 590
AL D++ +D EL R N+ ++ + H W + + NG +G+ P+ ++
Sbjct: 5 ALYDYQTNDPQELALRYNEEYHLLDSSEIHWWRVQDKNGHEGYVPSSYL 53
>gnl|CDD|212878 cd11945, SH3_Endophilin_B1, Src homology 3 domain of Endophilin-B1.
Endophilin-B1, also called Bax-interacting factor 1
(Bif-1) or SH3GLB1 (SH3-domain GRB2-like endophilin B1),
is localized mainly to the Golgi apparatus. It is
involved in the regulation of many biological events
including autophagy, tumorigenesis, nerve growth factor
(NGF) trafficking, neurite outgrowth, mitochondrial
outer membrane dynamics, and cell death. Endophilins
play roles in synaptic vesicle formation, virus budding,
mitochondrial morphology maintenance, receptor-mediated
endocytosis inhibition, and endosomal sorting. They
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. Endophilin-B1 forms homo- and
heterodimers (with endophilin-B2) through its BAR
domain. It interacts with amphiphysin 1 and dynamin 1
through its SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 61
Score = 34.2 bits (78), Expect = 0.023
Identities = 20/61 (32%), Positives = 32/61 (52%), Gaps = 2/61 (3%)
Query: 536 SRQRRAKALLDFERHDDDELGFRKNDVITIIS--QKDEHCWIGELNGLKGWFPAKFVELL 593
S R+A+ L D++ + EL ++VIT+ S D +GE KG P ++ELL
Sbjct: 1 SGSRKARVLYDYDAANSTELSLLADEVITVYSVPGMDSDWLMGERGNQKGKVPITYLELL 60
Query: 594 D 594
+
Sbjct: 61 N 61
>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 = 33.9 bits (78), Expect = 0.023
Identities = 20/57 (35%), Positives = 29/57 (50%), Gaps = 5/57 (8%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGEL---NGLK--GWFPAKFVE 591
+ KAL +E +D+L F +IT+ ++D + GE NG G FP FVE
Sbjct: 3 KVKALYPYESDHEDDLNFDVGQLITVTEEEDADWYFGEYVDSNGNTKEGIFPKNFVE 59
>gnl|CDD|212978 cd12045, SH3_SKAP2, Src Homology 3 domain of Src Kinase-Associated
Phosphoprotein 2. SKAP2, also called SKAP55-Related
(SKAP55R) or SKAP55 homolog (SKAP-HOM or SKAP55-HOM), is
an immune cell-specific adaptor protein that plays an
important role in adhesion and migration of B-cells and
macrophages. Binding partners include ADAP (adhesion and
degranulation-promoting adaptor protein), YopH, SHPS1,
and HPK1. SKAP2 has also been identified as a substrate
for lymphoid-specific tyrosine phosphatase (Lyp), which
has been implicated in a wide variety of autoimmune
diseases. It contains a pleckstrin homology (PH) domain,
a C-terminal SH3 domain, and several tyrosine
phosphorylation sites. Like SKAP1, SKAP2 is expected to
bind primarily to a proline-rich region of ADAP through
its SH3 domain; its degradation may be regulated by
ADAP. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 33.7 bits (77), Expect = 0.024
Identities = 14/40 (35%), Positives = 23/40 (57%), Gaps = 2/40 (5%)
Query: 553 DELGFRKNDVITIISQKDEH--CWIGELNGLKGWFPAKFV 590
DEL F++ D I I+S++ W+GE+ G G P ++
Sbjct: 14 DELSFKRGDTIYILSKEYNRFGWWVGEMKGTIGLVPKAYI 53
>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 = 33.8 bits (78), Expect = 0.025
Identities = 15/52 (28%), Positives = 25/52 (48%), Gaps = 2/52 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQK--DEHCWIGELNGLKGWFPAKF 589
+A+ L D++ D EL ++VIT+ DE +GE +G P +
Sbjct: 1 KARVLYDYDAEDSTELSLLADEVITVYELPGMDEDYMMGERGSQRGKVPVAY 52
>gnl|CDD|212902 cd11969, SH3_PLCgamma2, Src homology 3 domain of Phospholipase C
(PLC) gamma 2. PLCgamma2 is primarily expressed in
haematopoietic cells, specifically in B cells. It is
activated by tyrosine phosphorylation by B cell receptor
(BCR) kinases and is recruited to the plasma membrane
where its substrate is located. It is required in
pre-BCR signaling and in the maturation of B cells. PLCs
catalyze the hydrolysis of phosphatidylinositol
(4,5)-bisphosphate [PtdIns(4,5)P2] to produce
Ins(1,4,5)P3 and diacylglycerol (DAG). Ins(1,4,5)P3
initiates the calcium signaling cascade while DAG
functions as an activator of PKC. PLCgamma contains a
Pleckstrin homology (PH) domain followed by an
elongation factor (EF) domain, two catalytic regions of
PLC domains that flank two tandem SH2 domains, followed
by a SH3 domain and C2 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 33.7 bits (77), Expect = 0.029
Identities = 18/51 (35%), Positives = 29/51 (56%), Gaps = 1/51 (1%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNG-LKGWFPAKFVE 591
KAL D+ DEL F K +I +S++ W G+ G ++ +FP+ +VE
Sbjct: 3 KALYDYRAKRSDELSFCKGALIHNVSKETGGWWKGDYGGKVQHYFPSNYVE 53
>gnl|CDD|212980 cd12047, SH3_Noxa1_C, C-terminal Src Homology 3 domain of NADPH
oxidase activator 1. Noxa1 is a homolog of p67phox and
is a cytosolic subunit of the nonphagocytic NADPH
oxidase complex Nox1, which catalyzes the transfer of
electrons from NADPH to molecular oxygen to form
superoxide. Noxa1 is co-expressed with Nox1 in colon,
stomach, uterus, prostate, and vascular smooth muscle
cells, consistent with its regulatory role. It does not
interact with p40phox, unlike p67phox, making Nox1
activity independent of p40phox, unlike Nox2. Noxa1
contains TPR, PB1, and C-terminal SH3 domains, but lacks
the central SH3 domain that is present in p67phox. The
TPR domain binds activated GTP-bound Rac. The C-terminal
SH3 domain binds the polyproline motif found at the
C-terminus of Noxo1, a homolog of p47phox. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 33.6 bits (77), Expect = 0.032
Identities = 15/51 (29%), Positives = 24/51 (47%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
R A D+ ++L F + D I I+S+ ++ G +G G FP F
Sbjct: 1 RMVAQHDYSAQGPEDLEFSQGDTIDILSEVNQEWLEGHCDGRIGIFPKCFA 51
>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 = 33.6 bits (77), Expect = 0.033
Identities = 12/45 (26%), Positives = 25/45 (55%)
Query: 547 FERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
++ ++DE+GF V+ +I + + W G +GW PA +++
Sbjct: 9 YKAENEDEIGFETGVVVEVIQKNLDGWWKIRYQGKEGWAPATYLK 53
>gnl|CDD|212877 cd11944, SH3_Endophilin_B2, Src homology 3 domain of Endophilin-B2.
Endophilin-B2, also called SH3GLB2 (SH3-domain
GRB2-like endophilin B2), is a cytoplasmic protein that
interacts with the apoptosis inducer Bax. It is
overexpressed in prostate cancer metastasis and has been
identified as a cancer antigen with potential utility in
immunotherapy. Endophilins play roles in synaptic
vesicle formation, virus budding, mitochondrial
morphology maintenance, receptor-mediated endocytosis
inhibition, and endosomal sorting. They 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. Endophilin-B2 forms homo- and heterodimers (with
endophilin-B1) through its BAR domain. The related
protein endophilin-B1 interacts with amphiphysin 1 and
dynamin 1 through its SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 33.4 bits (76), Expect = 0.036
Identities = 19/55 (34%), Positives = 28/55 (50%), Gaps = 2/55 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIIS--QKDEHCWIGELNGLKGWFPAKFVEL 592
+A+ L D+E D EL +++IT+ S D IGE KG P ++EL
Sbjct: 1 KARVLYDYEAADSSELALLADELITVYSLPGMDPDWLIGERGNQKGKVPVTYLEL 55
>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 = 33.2 bits (76), Expect = 0.039
Identities = 16/52 (30%), Positives = 27/52 (51%), Gaps = 3/52 (5%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWI--GELNGLKGWFPAKFV 590
AKAL D+++ ++EL F + D + + D WI G G+ PA ++
Sbjct: 2 AKALYDYDKQTEEELSFNEGDTLDVYDDSDSD-WILVGFNGTQFGFVPANYI 52
>gnl|CDD|212693 cd11759, SH3_CRK_C, C-terminal Src Homology 3 domain of Ct10
Regulator of Kinase adaptor proteins. CRK adaptor
proteins consists of SH2 and SH3 domains, which bind
tyrosine-phosphorylated peptides and proline-rich
motifs, respectively. They function downstream of
protein tyrosine kinases in many signaling pathways
started by various extracellular signals, including
growth and differentiation factors. Cellular CRK (c-CRK)
contains a single SH2 domain, followed by N-terminal and
C-terminal SH3 domains. It is involved in the regulation
of many cellular processes including cell growth,
motility, adhesion, and apoptosis. CRK has been
implicated in the malignancy of various human cancers.
The C-terminal SH3 domain of CRK has not been shown to
bind any target protein; it acts as a negative regulator
of CRK function by stabilizing a structure that inhibits
the access by target proteins to the N-terminal SH3
domain. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes by intramolecular interactions,
changing the subcellular localization of signal pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 33.2 bits (76), Expect = 0.041
Identities = 21/64 (32%), Positives = 26/64 (40%), Gaps = 8/64 (12%)
Query: 529 AYADVSRSRQRRAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAK 588
AYA V + R A +D L D++ + W GELNG G FP
Sbjct: 2 AYARVIQKRVPNA--------YDKTALALEVGDLVKVTKINVSGQWEGELNGKVGHFPFT 53
Query: 589 FVEL 592
VEL
Sbjct: 54 HVEL 57
>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 = 32.8 bits (75), Expect = 0.044
Identities = 18/47 (38%), Positives = 26/47 (55%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKF 589
AL F+ + +EL F D I II+ ++ GEL G +G FP +F
Sbjct: 4 ALYRFQALEPNELDFEVGDRIRIIATLEDGWLEGELKGRRGIFPHRF 50
>gnl|CDD|212996 cd12063, SH3_Caskin2, Src Homology 3 domain of CASK interacting
protein 2. Caskin2 is a multidomain adaptor protein
that contains six ankyrin repeats, a single SH3 domain,
tandem sterile alpha motif (SAM) domains, and a long
disordered proline-rich region. It shares a domain
architecture with Caskin1, but does not bind CASK. The
function of Caskin2 is still unknown. SH3 domains bind
to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs; they play a
role in the regulation of enzymes by intramolecular
interactions, changing the subcellular localization of
signal pathway components and mediate multiprotein
complex assemblies.
Length = 62
Score = 33.4 bits (76), Expect = 0.047
Identities = 20/61 (32%), Positives = 31/61 (50%), Gaps = 7/61 (11%)
Query: 540 RAKALLDF-ERHDDDELGFRKNDVITIISQKDEHCWIGELNGLK------GWFPAKFVEL 592
+ +AL DF HD L R DVIT++ Q + W G ++ + G+FP VE+
Sbjct: 2 KVRALKDFWNLHDPTALNVRAGDVITVLEQHPDGRWKGHIHDSQRGTDRVGYFPPSIVEV 61
Query: 593 L 593
+
Sbjct: 62 I 62
>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 = 33.0 bits (75), Expect = 0.048
Identities = 18/57 (31%), Positives = 28/57 (49%), Gaps = 4/57 (7%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQK----DEHCWIGELNGLKGWFPAKFVELL 593
A+AL + +EL F + +I ++ + D+ W GE G G FP+ VE L
Sbjct: 2 ARALYSYTGQSPEELSFPEGALIRLLPRAQDGVDDGFWRGEFGGRVGVFPSLLVEEL 58
>gnl|CDD|212849 cd11916, SH3_Sorbs1_3, Third (or C-terminal) Src Homology 3 domain
of Sorbin and SH3 domain containing 1 (Sorbs1), also
called ponsin. Sorbs1 is also called ponsin, SH3P12, or
CAP (c-Cbl associated protein). It is an adaptor protein
containing one sorbin homology (SoHo) and three SH3
domains. It binds Cbl and plays a major role in
regulating the insulin signaling pathway by enhancing
insulin-induced phosphorylation of Cbl. Sorbs1, like
vinexin, localizes at cell-ECM and cell-cell adhesion
sites where it binds vinculin, paxillin, and afadin. It
may function in the control of cell motility. Other
interaction partners of Sorbs1 include c-Abl, Sos,
flotillin, Grb4, ataxin-7, filamin C, among others. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 33.0 bits (75), Expect = 0.060
Identities = 17/54 (31%), Positives = 30/54 (55%), Gaps = 2/54 (3%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLK--GWFPAKFVELL 593
+AL + +DDEL R D++ ++ + D+ ++G K G FP +V+LL
Sbjct: 5 QALYSYAPQNDDELELRDGDIVDVMEKCDDGWFVGTSRRTKQFGTFPGNYVKLL 58
>gnl|CDD|212727 cd11793, SH3_ephexin1_like, Src homology 3 domain of ephexin-1-like
SH3 domain containing Rho guanine nucleotide exchange
factors. Members of this family contain RhoGEF (also
called Dbl-homologous or DH), Pleckstrin Homology (PH),
and C-terminal SH3 domains. They include the Rho guanine
nucleotide exchange factors ARHGEF5, ARHGEF16, ARHGEF19,
ARHGEF26, ARHGEF27 (also called ephexin-1), and similar
proteins, and are also called ephexins because they
interact directly with ephrin A receptors. GEFs interact
with Rho GTPases via their DH domains to catalyze
nucleotide exchange by stabilizing the nucleotide-free
GTPase intermediate. They play important roles in
neuronal development. The SH3 domains of ARHGEFs play an
autoinhibitory role through intramolecular interactions
with a proline-rich region N-terminal to the DH domain.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 32.7 bits (75), Expect = 0.064
Identities = 13/41 (31%), Positives = 24/41 (58%), Gaps = 2/41 (4%)
Query: 553 DELGFRKNDVITIISQKDEHCWIGE--LNGLKGWFPAKFVE 591
DEL + DV+ ++ + + + GE +G +GWFP+ + E
Sbjct: 14 DELTLEEGDVVNVLRKMPDGWYEGERLRDGERGWFPSSYTE 54
>gnl|CDD|212713 cd11779, SH3_Irsp53_BAIAP2L, Src Homology 3 domain of Insulin
Receptor tyrosine kinase Substrate p53, Brain-specific
Angiogenesis Inhibitor 1-Associated Protein 2
(BAIAP2)-Like proteins, and similar proteins. Proteins
in this family include IRSp53, BAIAP2L1, BAIAP2L2, and
similar proteins. They all contain an
Inverse-Bin/Amphiphysin/Rvs (I-BAR) or IMD domain in
addition to the SH3 domain. IRSp53, also known as
BAIAP2, is a scaffolding protein that takes part in many
signaling pathways including Cdc42-induced filopodia
formation, Rac-mediated lamellipodia extension, and
spine morphogenesis. IRSp53 exists as multiple splicing
variants that differ mainly at the C-termini. BAIAP2L1,
also called IRTKS (Insulin Receptor Tyrosine Kinase
Substrate), serves as a substrate for the insulin
receptor and binds the small GTPase Rac. It plays a role
in regulating the actin cytoskeleton and colocalizes
with F-actin, cortactin, VASP, and vinculin. IRSp53 and
IRTKS also mediate the recruitment of effector proteins
Tir and EspFu, which regulate host cell actin
reorganization, to bacterial attachment sites. BAIAP2L2
co-localizes with clathrin plaques but its function has
not been determined. The SH3 domains of IRSp53 and IRTKS
have been shown to bind the proline-rich C-terminus of
EspFu. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 32.7 bits (75), Expect = 0.075
Identities = 19/56 (33%), Positives = 28/56 (50%), Gaps = 3/56 (5%)
Query: 539 RRAKALLDFERHDDDELGFRKNDVITIISQKDEHCW-IGEL--NGLKGWFPAKFVE 591
R KAL + +L F + DVIT++ + W GE +G +GWFP + E
Sbjct: 1 PRVKALYPHAAGGETQLSFEEGDVITLLGPEPRDGWHYGENERSGRRGWFPIAYTE 56
>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 = 32.2 bits (74), Expect = 0.11
Identities = 17/60 (28%), Positives = 31/60 (51%), Gaps = 11/60 (18%)
Query: 540 RAKALLDFERHDDDE-------LGFRKNDVITIISQKDEHCW----IGELNGLKGWFPAK 588
+AL D++ +D L F+K D++ I++Q D + W +G+ NG G P++
Sbjct: 1 FVRALFDYDPEEDPLIPCKEAGLSFKKGDILQIVNQDDPNWWQARKVGDPNGRAGLIPSQ 60
>gnl|CDD|212714 cd11780, SH3_Sorbs_3, Third (or C-terminal) Src Homology 3 domain
of Sorbin and SH3 domain containing (Sorbs) proteins and
similar domains. This family, also called the vinexin
family, is composed predominantly of adaptor proteins
containing one sorbin homology (SoHo) and three SH3
domains. Members include the third SH3 domains of Sorbs1
(or ponsin), Sorbs2 (or ArgBP2), Vinexin (or Sorbs3),
and similar domains. They are involved in the regulation
of cytoskeletal organization, cell adhesion, and growth
factor signaling. Members of this family bind multiple
partners including signaling molecules like c-Abl,
c-Arg, Sos, and c-Cbl, as well as cytoskeletal molecules
such as vinculin and afadin. They may have overlapping
functions. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 31.9 bits (73), Expect = 0.12
Identities = 17/54 (31%), Positives = 31/54 (57%), Gaps = 2/54 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIG--ELNGLKGWFPAKFVE 591
R +AL + ++DEL R+ D++ ++ + D+ ++G E GL G FP +V
Sbjct: 1 RYRALYSYTPQNEDELELREGDIVYVMEKCDDGWFVGTSERTGLFGTFPGNYVA 54
>gnl|CDD|212728 cd11794, SH3_DNMBP_N1, First N-terminal Src homology 3 domain of
Dynamin Binding Protein, also called Tuba. DNMBP or
Tuba is a cdc42-specific guanine nucleotide exchange
factor (GEF) that contains four N-terminal SH3 domains,
a central RhoGEF [or Dbl homology (DH)] domain followed
by a Bin/Amphiphysin/Rvs (BAR) domain, and two
C-terminal SH3 domains. It provides a functional link
between dynamin and key regulatory proteins of the actin
cytoskeleton. It plays an important role in regulating
cell junction configuration. The four N-terminal SH3
domains of DNMBP binds the GTPase dynamin, which plays
an important role in the fission of endocytic vesicles.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 51
Score = 31.7 bits (72), Expect = 0.12
Identities = 17/50 (34%), Positives = 25/50 (50%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
+A+ DF +EL DVI ++ DE +G G+ G FP+ FV
Sbjct: 2 VRAIFDFCPSVSEELPLFAGDVIEVLKVVDEFWLLGTKEGVTGQFPSSFV 51
>gnl|CDD|212918 cd11985, SH3_Stac2_C, C-terminal Src homology 3 domain of SH3 and
cysteine-rich domain-containing protein 2 (Stac2). Stac
proteins are putative adaptor proteins that contain a
cysteine-rich C1 domain and one or two SH3 domains at
the C-terminus. There are three mammalian members
(Stac1, Stac2, and Stac3) of this family. Stac2 contains
a single SH3 domain at the C-terminus unlike Stac1 and
Stac3, which contain two C-terminal SH3 domains. Stac1
and Stac2 have been found to be expressed differently in
mature dorsal root ganglia (DRG) neurons. Stac1 is
mainly expressed in peptidergic neurons while Stac2 is
found in a subset of nonpeptidergic and all trkB+
neurons. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 31.8 bits (72), Expect = 0.12
Identities = 14/49 (28%), Positives = 26/49 (53%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
AL F ++++L + D + ++ +E W G+ G+FPA FV+
Sbjct: 4 ALYKFLPQENNDLPLQPGDRVMVVDDSNEDWWKGKSGDRVGFFPANFVQ 52
>gnl|CDD|212785 cd11851, SH3_RIM-BP, Src homology 3 domains of Rab3-interacting
molecules (RIMs) binding proteins. RIMs binding
proteins (RBPs, RIM-BPs) associate with calcium channels
present in photoreceptors, neurons, and hair cells; they
interact simultaneously with specific calcium channel
subunits, and active zone proteins, RIM1 and RIM2. RIMs
are part of the matrix at the presynaptic active zone
and are associated with synaptic vesicles through their
interaction with the small GTPase Rab3. RIM-BPs play a
role in regulating synaptic transmission by serving as
adaptors and linking calcium channels with the synaptic
vesicle release machinery. RIM-BPs contain three SH3
domains and two to three fibronectin III repeats.
Invertebrates contain one, while vertebrates contain at
least two RIM-BPs, RIM-BP1 and RIM-BP2. RIM-BP1 is also
called peripheral-type benzodiazapine receptor
associated protein 1 (PRAX-1). Mammals contain a third
protein, RIM-BP3. RIM-BP1 and RIM-BP2 are predominantly
expressed in the brain where they display overlapping
but distinct expression patterns, while RIM-BP3 is
almost exclusively expressed in the testis and is
essential in spermiogenesis. The SH3 domains of RIM-BPs
bind to the PxxP motifs of RIM1, RIM2, and L-type
(alpha1D) and N-type (alpha1B) calcium channel subunits.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 62
Score = 31.9 bits (73), Expect = 0.13
Identities = 16/42 (38%), Positives = 23/42 (54%), Gaps = 2/42 (4%)
Query: 552 DDELGFRKNDVITIISQKDEHCWI-GELNGL-KGWFPAKFVE 591
++EL F DV+ + DE + GEL G KG P+ FV+
Sbjct: 20 EEELSFHAGDVVRVYGPMDEDGFYYGELEGGRKGLVPSNFVQ 61
>gnl|CDD|212966 cd12033, SH3_MPP7, Src Homology 3 domain of Membrane Protein,
Palmitoylated 7 (or MAGUK p55 subfamily member 7). MPP7
is a scaffolding protein that binds to DLG1 and promotes
tight junction formation and epithelial cell polarity.
Mutations in the MPP7 gene may be associated with the
pathogenesis of diabetes and extreme bone mineral
density. It is one of seven vertebrate homologs of the
Drosophila Stardust protein, which is required in
establishing cell polarity, and it contains two L27
domains followed by the core of three domains
characteristic of MAGUK (membrane-associated guanylate
kinase) proteins: PDZ, SH3, and guanylate kinase (GuK).
The GuK domain in MAGUK proteins is enzymatically
inactive; instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 61
Score = 31.9 bits (72), Expect = 0.13
Identities = 19/58 (32%), Positives = 28/58 (48%), Gaps = 11/58 (18%)
Query: 542 KALLDFERHDDDE-------LGFRKNDVITIISQKDEHCWI----GELNGLKGWFPAK 588
KAL D+ ++D L F+K D++ I+SQ D W G+ N G P+K
Sbjct: 3 KALFDYNPNEDKAIPCKEAGLSFKKGDILQIMSQDDATWWQAKHEGDANPRAGLIPSK 60
>gnl|CDD|212734 cd11800, SH3_DNMBP_C2_like, Second C-terminal Src homology 3 domain
of Dynamin Binding Protein, also called Tuba, and
similar domains. DNMBP or Tuba is a cdc42-specific
guanine nucleotide exchange factor (GEF) that contains
four N-terminal SH3 domains, a central RhoGEF [or Dbl
homology (DH)] domain followed by a Bin/Amphiphysin/Rvs
(BAR) domain, and two C-terminal SH3 domains. It
provides a functional link between dynamin, Rho GTPase
signaling, and actin dynamics. It plays an important
role in regulating cell junction configuration. The
C-terminal SH3 domains of DNMBP bind to N-WASP and
Ena/VASP proteins, which are key regulatory proteins of
the actin cytoskeleton. Also included in this subfamily
is the second C-terminal SH3 domain of Rho guanine
nucleotide exchange factor 37 (ARHGEF37), whose function
is still unknown. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 31.6 bits (72), Expect = 0.14
Identities = 14/51 (27%), Positives = 24/51 (47%), Gaps = 4/51 (7%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEH----CWIGELNGLKGWFPAKF 589
AL FE EL + V+T++ + D W+ E G +G+ P+ +
Sbjct: 4 ALYTFEARSPGELSVTEGQVVTVLEKHDLKGNPEWWLVEDRGKQGYVPSNY 54
>gnl|CDD|212703 cd11769, SH3_CSK, Src Homology 3 domain of C-terminal Src kinase.
CSK is a cytoplasmic (or nonreceptor) tyr kinase
containing the Src homology domains, SH3 and SH2,
N-terminal to the catalytic tyr kinase domain. They
negatively regulate the activity of Src kinases that are
anchored to the plasma membrane. To inhibit Src kinases,
CSK is translocated to the membrane via binding to
specific transmembrane proteins, G-proteins, or adaptor
proteins near the membrane. CSK catalyzes the tyr
phosphorylation of the regulatory C-terminal tail of Src
kinases, resulting in their inactivation. It is
expressed in a wide variety of tissues and plays a role,
as a regulator of Src, in cell proliferation, survival,
and differentiation, and consequently, in cancer
development and progression. In addition, CSK also shows
Src-independent functions. It is a critical component in
G-protein signaling, and plays a role in cytoskeletal
reorganization and cell migration. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 57
Score = 31.9 bits (73), Expect = 0.14
Identities = 15/51 (29%), Positives = 30/51 (58%), Gaps = 2/51 (3%)
Query: 543 ALLDFERHDDDELGFRKNDVITII-SQKDEHCWIGE-LNGLKGWFPAKFVE 591
A +F +++L F+K D++TI+ KD + + + +G +G PA +V+
Sbjct: 6 AKYNFNGASEEDLPFKKGDILTIVAVTKDPNWYKAKNKDGREGMIPANYVQ 56
>gnl|CDD|212850 cd11917, SH3_Sorbs2_3, Third (or C-terminal) Src Homology 3 domain
of Sorbin and SH3 domain containing 2 (Sorbs2), also
called Arg-binding protein 2 (ArgBP2). Sorbs2 or ArgBP2
is an adaptor protein containing one sorbin homology
(SoHo) and three SH3 domains. It regulates
actin-dependent processes including cell adhesion,
morphology, and migration. It is expressed in many
tissues and is abundant in the heart. Like vinexin, it
is found in focal adhesion where it interacts with
vinculin and afadin. It also localizes in epithelial
cell stress fibers and in cardiac muscle cell Z-discs.
Sorbs2 has been implicated to play roles in the
signaling of c-Arg, Akt, and Pyk2. Other interaction
partners of Sorbs2 include c-Abl, flotillin, spectrin,
dynamin 1/2, synaptojanin, PTP-PEST, among others. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 61
Score = 31.9 bits (72), Expect = 0.15
Identities = 17/54 (31%), Positives = 31/54 (57%), Gaps = 2/54 (3%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLK--GWFPAKFVELL 593
+AL ++ ++DEL R+ DVI ++ + D+ ++G K G FP +V+ L
Sbjct: 8 QALYNYMPRNEDELELREGDVIDVMEKCDDGWFVGTSRRTKFFGTFPGNYVKRL 61
>gnl|CDD|212825 cd11892, SH3_MIA2, Src Homology 3 domain of Melanoma Inhibitory
Activity 2 protein. MIA2 is expressed specifically in
hepatocytes and its expression is controlled by
hepatocyte nuclear factor 1 binding sites in the MIA2
promoter. It inhibits the growth and invasion of
hepatocellular carcinomas (HCC) and may act as a tumor
suppressor. A mutation in MIA2 in mice resulted in
reduced cholesterol and triglycerides. Since MIA2
localizes to ER exit sites, it may function as an
ER-to-Golgi trafficking protein that regulates lipid
metabolism. MIA2 contains an N-terminal SH3-like domain,
similar to MIA. It is a member of the recently
identified family that also includes MIA, MIAL, and MIA3
(also called TANGO). MIA is a single domain protein that
adopts a SH3 domain-like fold; it contains an additional
antiparallel beta sheet and two disulfide bonds compared
to classical SH3 domains. Unlike classical SH3 domains,
MIA does not bind proline-rich ligands.
Length = 73
Score = 32.1 bits (73), Expect = 0.16
Identities = 17/50 (34%), Positives = 24/50 (48%), Gaps = 3/50 (6%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITI---ISQKDEHCWIGELNGLKGWFP 586
R +A+ D+ D L F+K D I + +S K E W G G+FP
Sbjct: 13 RVQAIRDYRGPDCRYLSFKKGDEIIVYYKLSGKREDLWAGSTGKEFGYFP 62
>gnl|CDD|187779 cd09648, Cas2_I-E, CRISPR/Cas system-associated protein Cas2.
CRISPR (Clustered Regularly Interspaced Short
Palindromic Repeats) and associated Cas proteins
comprise a system for heritable host defense by
prokaryotic cells against phage and other foreign DNA;
Cas2 is present in majority of CRISPR/Cas systems along
with Cas1; RNAse specific to U-rich regions; Possesses
an RRM/ferredoxin fold.
Length = 93
Score = 32.5 bits (74), Expect = 0.18
Identities = 21/77 (27%), Positives = 28/77 (36%), Gaps = 14/77 (18%)
Query: 316 WFLTL----FASVVHFKILLRIWDLL---FLD-GSIVLFHSCEPVLVTLENSAEIFNALS 367
W L + V + RIWD L GS+V+ S E F L
Sbjct: 20 WLLEPRAGVYVGGVSASVRERIWDYLAQHCPPKGSLVITWS-----SNTCPGFEFF-TLG 73
Query: 368 DIPGDIVDIDNLLEVGA 384
+ +IV+ID L V
Sbjct: 74 ENRKEIVEIDGLPLVIR 90
>gnl|CDD|212818 cd11885, SH3_SH3TC, Src Homology 3 domain of SH3 domain and
tetratricopeptide repeat-containing (SH3TC) proteins and
similar domains. This subfamily is composed of
vertebrate SH3TC proteins and hypothetical fungal
proteins containing BAR and SH3 domains. Mammals contain
two SH3TC proteins, SH3TC1 and SH3TC2. The function of
SH3TC1 is unknown. SH3TC2 is localized in Schwann cells
in the peripheral nervous system, where it interacts
with Rab11 and plays a role in peripheral nerve
myelination. Mutations in SH3TC2 are associated with
Charcot-Marie-Tooth disease type 4C, a severe hereditary
peripheral neuropathy with symptoms that include
progressive scoliosis, delayed age of walking, muscular
atrophy, distal weakness, and reduced nerve conduction
velocity. SH3 domains bind to proline-rich ligands with
moderate affinity and selectivity, preferentially to
PxxP motifs; they play a role in the regulation of
enzymes by intramolecular interactions, changing the
subcellular localization of signal pathway components
and mediate multiprotein complex assemblies.
Length = 55
Score = 31.5 bits (72), Expect = 0.18
Identities = 12/27 (44%), Positives = 15/27 (55%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITII 566
A +DFE + EL FR+ D I II
Sbjct: 1 SCTAKMDFEGVEPGELSFRQGDSIEII 27
>gnl|CDD|212846 cd11913, SH3_BAIAP2L1, Src Homology 3 domain of Brain-specific
Angiogenesis Inhibitor 1-Associated Protein 2-Like 1,
also called Insulin Receptor Tyrosine Kinase Substrate
(IRTKS). BAIAP2L1 or IRTKS is widely expressed, serves
as a substrate for the insulin receptor, and binds the
small GTPase Rac. It plays a role in regulating the
actin cytoskeleton and colocalizes with F-actin,
cortactin, VASP, and vinculin. BAIAP2L1 expression leads
to the formation of short actin bundles, distinct from
filopodia-like protrusions induced by the expression of
the related protein IRSp53. IRTKS mediates the
recruitment of effector proteins Tir and EspFu, which
regulate host cell actin reorganization, to bacterial
attachment sites. It contains an N-terminal IMD or
Inverse-Bin/Amphiphysin/Rvs (I-BAR) domain, an SH3
domain, and a WASP homology 2 (WH2) actin-binding motif
at the C-terminus. The SH3 domain of IRTKS has been
shown to bind the proline-rich C-terminus of EspFu. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 31.4 bits (71), Expect = 0.20
Identities = 13/41 (31%), Positives = 24/41 (58%), Gaps = 3/41 (7%)
Query: 555 LGFRKNDVITIISQKDEHCWI-GELN--GLKGWFPAKFVEL 592
L F + DVIT++ +++ W+ GE + +GWFP+ +
Sbjct: 18 LSFAQGDVITLLIPEEKDGWLYGEHDTTKARGWFPSSYTRP 58
>gnl|CDD|212969 cd12036, SH3_MPP5, Src Homology 3 domain of Membrane Protein,
Palmitoylated 5 (or MAGUK p55 subfamily member 5).
MPP5, also called PALS1 (Protein associated with Lin7)
or Nagie oko protein in zebrafish or Stardust in
Drosophila, is a scaffolding protein which associates
with Crumbs homolog 1 (CRB1), CRB2, or CRB3 through its
PDZ domain and with PALS1-associated tight junction
protein (PATJ) or multi-PDZ domain protein 1 (MUPP1)
through its L27 domain. The resulting tri-protein
complexes are core proteins of the Crumb complex, which
localizes at tight junctions or subapical regions, and
is involved in the maintenance of apical-basal polarity
in epithelial cells and the morphogenesis and function
of photoreceptor cells. MPP5 is critical for the proper
stratification of the retina and is also expressed in T
lymphocytes where it is important for TCR-mediated
activation of NFkB. Drosophila Stardust exists in
several isoforms, some of which show opposing functions
in photoreceptor cells, which suggests that the relative
ratio of different Crumbs complexes regulates
photoreceptor homeostasis. MPP5 contains two L27 domains
followed by the core of three domains characteristic of
MAGUK (membrane-associated guanylate kinase) proteins:
PDZ, SH3, and guanylate kinase (GuK). In addition, it
also contains the Hook (Protein 4.1 Binding) motif in
between the SH3 and GuK domains. The GuK domain in MAGUK
proteins is enzymatically inactive; instead, the domain
mediates protein-protein interactions and associates
intramolecularly with the SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 63
Score = 31.2 bits (71), Expect = 0.23
Identities = 15/40 (37%), Positives = 24/40 (60%), Gaps = 7/40 (17%)
Query: 542 KALLDFERHDDD-----ELG--FRKNDVITIISQKDEHCW 574
+A D++ DD ELG F+K D++ +ISQ+D + W
Sbjct: 3 RAHFDYDPEDDPYIPCRELGLSFQKGDILHVISQEDPNWW 42
>gnl|CDD|212702 cd11768, SH3_Tec_like, Src Homology 3 domain of Tec-like Protein
Tyrosine Kinases. The Tec (Tyrosine kinase expressed in
hepatocellular carcinoma) subfamily is composed of Tec,
Btk, Bmx (Etk), Itk (Tsk, Emt), Rlk (Txk), and similar
proteins. They are cytoplasmic (or nonreceptor) tyr
kinases containing Src homology protein interaction
domains (SH3, SH2) N-terminal to the catalytic tyr
kinase domain. Most Tec subfamily members (except Rlk)
also contain an N-terminal pleckstrin homology (PH)
domain, which binds the products of PI3K and allows
membrane recruitment and activation. In addition, some
members contain the Tec homology (TH) domain, which
contains proline-rich and zinc-binding regions. Tec
kinases are expressed mainly by haematopoietic cells,
although Tec and Bmx are also found in endothelial
cells. B-cells express Btk and Tec, while T-cells
express Itk, Txk, and Tec. Collectively, Tec kinases are
expressed in a variety of myeloid cells such as mast
cells, platelets, macrophages, and dendritic cells. Each
Tec kinase shows a distinct cell-type pattern of
expression. The function of Tec kinases in lymphoid
cells have been studied extensively. They play important
roles in the development, differentiation, maturation,
regulation, survival, and function of B-cells and
T-cells. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 31.1 bits (71), Expect = 0.24
Identities = 14/50 (28%), Positives = 26/50 (52%), Gaps = 1/50 (2%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCW-IGELNGLKGWFPAKFVE 591
AL DF+ + +L K + ++ +EH W + NG +G+ P+ +V
Sbjct: 4 ALYDFQPIEPGDLPLEKGEEYVVLDDSNEHWWRARDKNGNEGYIPSNYVT 53
>gnl|CDD|212948 cd12015, SH3_Tks_1, First Src homology 3 domain of Tyrosine kinase
substrate (Tks) proteins. Tks proteins are Src
substrates and scaffolding proteins that play important
roles in the formation of podosomes and invadopodia, the
dynamic actin-rich structures that are related to cell
migration and cancer cell invasion. Vertebrates contain
two Tks proteins, Tks4 (Tyr kinase substrate with four
SH3 domains) and Tks5 (Tyr kinase substrate with five
SH3 domains), which display partially overlapping but
non-redundant functions. Both associate with the ADAMs
family of transmembrane metalloproteases, which function
as sheddases and mediators of cell and matrix
interactions. Tks5 interacts with N-WASP and Nck, while
Tks4 is essential for the localization of MT1-MMP
(membrane-type 1 matrix metalloproteinase) to
invadopodia. Tks proteins contain an N-terminal Phox
homology (PX) domain and four or five SH3 domains. This
model characterizes the first SH3 domain of Tks
proteins. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 30.9 bits (70), Expect = 0.25
Identities = 13/46 (28%), Positives = 25/46 (54%)
Query: 546 DFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
D+++ +E+ R DV+ +I + + W L +GW PA ++E
Sbjct: 7 DYKKQQPNEISLRAGDVVDVIEKNENGWWFVSLEDEQGWVPATYLE 52
>gnl|CDD|212998 cd12065, SH3_GRAF2, Src Homology 3 domain of GTPase Regulator
Associated with Focal adhesion kinase 2. GRAF2, also
called Rho GTPase activating protein 10 (ARHGAP10) or
PS-GAP, is a GAP with activity towards Cdc42 and RhoA.
It regulates caspase-activated p21-activated protein
kinase-2 (PAK-2p34). GRAF2 interacts with PAK-2p34,
leading to its stabilization and decrease of cell death.
It is highly expressed in skeletal muscle, and is
involved in alpha-catenin recruitment at cell-cell
junctions. GRAF2 contains an N-terminal BAR domain,
followed by a Pleckstrin homology (PH) domain, a Rho GAP
domain, and a C-terminal SH3 domain. The SH3 domain of
GRAF binds PKNbeta, a target of the small GTPase Rho.
SH3 domains bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs;
they play a role in the regulation of enzymes by
intramolecular interactions, changing the subcellular
localization of signal pathway components and mediate
multiprotein complex assemblies.
Length = 54
Score = 30.7 bits (69), Expect = 0.28
Identities = 17/54 (31%), Positives = 26/54 (48%), Gaps = 1/54 (1%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCWI-GELNGLKGWFPAKFVEL 592
+AKA+ E EL F + ++ E W+ G LNG +G P +VE+
Sbjct: 1 KAKAVYPCEAEHSSELSFEVGAIFEDVTLSREPGWLEGTLNGKRGLIPENYVEI 54
>gnl|CDD|212916 cd11983, SH3_Shank2, Src homology 3 domain of SH3 and multiple
ankyrin repeat domains protein 2. Shank2, also called
ProSAP1 (Proline-rich synapse-associated protein 1) or
CortBP1 (Cortactin-binding protein 1), is found in
neurons, glia, endocrine cells, liver, and kidney. It
plays a role in regulating dendritic spine volume and
branching and postsynaptic clustering. Mutations in the
Shank2 gene are associated with autism spectrum disorder
and mental retardation. Shank proteins carry scaffolding
functions through multiple sites of protein-protein
interaction in its domain architecture, including
ankyrin (ANK) repeats, a long proline rich region, as
well as SH3, PDZ, and SAM domains. The SH3 domain of
Shank binds GRIP, a scaffold protein that binds AMPA
receptors and Eph receptors/ligands. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 52
Score = 30.7 bits (69), Expect = 0.28
Identities = 13/44 (29%), Positives = 22/44 (50%)
Query: 547 FERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
++ + E+ K D + ++S + W G G GWFPA+ V
Sbjct: 9 YQPQVEGEIPLHKGDRVKVLSIGEGGFWEGSARGHVGWFPAECV 52
>gnl|CDD|233610 TIGR01873, cas_CT1978, CRISPR-associated endoribonuclease Cas2,
subtype I-E/ECOLI. CRISPR is a term for Clustered,
Regularly Interspaced Short Palidromic Repeats. A number
of protein families appear only in association with
these repeats and are designated Cas (CRISPR-Associated)
proteins. This model represents a minor branch of the
Cas2 family of CRISPR-associated endonuclease, whereas
most Cas2 proteins are modeled instead by TIGR01573.
This form of Cas2 is characteristic for the Ecoli
subtype of CRISPR/Cas locus [Mobile and extrachromosomal
element functions, Other].
Length = 87
Score = 31.7 bits (72), Expect = 0.29
Identities = 20/73 (27%), Positives = 27/73 (36%), Gaps = 14/73 (19%)
Query: 316 WFLTL----FASVVHFKILLRIWDLL---FLD-GSIVLFHSCEPVLVTLENSAEIFNALS 367
W L + V + RIWD L GS+V+ S E F L
Sbjct: 20 WLLEPRAGVYVGGVSASVRERIWDYLAQHCPPKGSLVITWS-----SNTCPGFEFF-TLG 73
Query: 368 DIPGDIVDIDNLL 380
+ +IV+ID L
Sbjct: 74 ENRKEIVEIDGLP 86
>gnl|CDD|212940 cd12007, SH3_Yes, Src homology 3 domain of Yes Protein Tyrosine
Kinase. Yes (or c-Yes) is a member of the Src subfamily
of proteins, which are cytoplasmic (or non-receptor)
PTKs. c-Yes kinase is the cellular homolog of the
oncogenic protein (v-Yes) encoded by the Yamaguchi 73
and Esh sarcoma viruses. It displays functional overlap
with other Src subfamily members, particularly Src. It
also shows some unique functions such as binding to
occludins, transmembrane proteins that regulate
extracellular interactions in tight junctions. Yes also
associates with a number of proteins in different cell
types that Src does not interact with, like JAK2 and
gp130 in pre-adipocytes, and Pyk2 in treated pulmonary
vein endothelial cells. Although the biological function
of Yes remains unclear, it appears to have a role in
regulating cell-cell interactions and vesicle
trafficking in polarized cells. Src kinases contain an
N-terminal SH4 domain with a myristoylation site,
followed by SH3 and SH2 domains, a tyr kinase domain,
and a regulatory C-terminal region containing a
conserved tyr. They are activated by autophosphorylation
at the tyr kinase domain, but are negatively regulated
by phosphorylation at the C-terminal tyr by Csk
(C-terminal Src Kinase). The SH3 domain of Src kinases
contributes to substrate recruitment by binding adaptor
proteins/substrates, and regulation of kinase activity
through an intramolecular interaction. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 30.8 bits (69), Expect = 0.29
Identities = 14/50 (28%), Positives = 24/50 (48%), Gaps = 2/50 (4%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGE--LNGLKGWFPAKFV 590
AL D+E ++L F+K + II+ + W G G+ P+ +V
Sbjct: 5 ALYDYEARTTEDLSFKKGERFQIINNTEGDWWEARSIATGKNGYIPSNYV 54
>gnl|CDD|212888 cd11955, SH3_srGAP1-3, Src homology 3 domain of Slit-Robo GTPase
Activating Proteins 1, 2, and 3. srGAP1, also called
Rho GTPase-Activating Protein 13 (ARHGAP13), is a Cdc42-
and RhoA-specific GAP and is expressed later in the
development of central nervous system tissues. srGAP2 is
expressed in zones of neuronal differentiation. It plays
a role in the regeneration of neurons and axons. srGAP3,
also called MEGAP (MEntal disorder associated
GTPase-Activating Protein), is a Rho GAP with activity
towards Rac1 and Cdc42. It impacts cell migration by
regulating actin and microtubule cytoskeletal dynamics.
The association between srGAP3 haploinsufficiency and
mental retardation is under debate. srGAPs are Rho GAPs
that interact with Robo1, the transmembrane receptor of
Slit proteins. Slit proteins are secreted proteins that
control axon guidance and the migration of neurons and
leukocytes. srGAPs contain an N-terminal F-BAR domain, a
Rho GAP domain, and a C-terminal SH3 domain. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 30.7 bits (69), Expect = 0.31
Identities = 13/50 (26%), Positives = 23/50 (46%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
A A D+ EL F+K + + + + W G NG+ G P +++
Sbjct: 2 AIAKFDYVGRSARELSFKKGASLLLYHRASDDWWEGRHNGIDGLVPHQYI 51
>gnl|CDD|212783 cd11849, SH3_SPIN90, Src homology 3 domain of SH3 protein
interacting with Nck, 90 kDa (SPIN90). SPIN90 is also
called NCK interacting protein with SH3 domain
(NCKIPSD), Dia-interacting protein (DIP), 54 kDa
vimentin-interacting protein (VIP54), or
WASP-interacting SH3-domain protein (WISH). It is an
F-actin binding protein that regulates actin
polymerization and endocytosis. It associates with the
Arp2/3 complex near actin filaments and determines
filament localization at the leading edge of
lamellipodia. SPIN90 is expressed in the early stages of
neuronal differentiation and plays a role in regulating
growth cone dynamics and neurite outgrowth. It also
interacts with IRSp53 and regulates cell motility by
playing a role in the formation of membrane protrusions.
SPIN90 contains an N-terminal SH3 domain, a proline-rich
domain, and a C-terminal VCA (verprolin-homology and
cofilin-like acidic) domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 30.4 bits (69), Expect = 0.35
Identities = 14/55 (25%), Positives = 28/55 (50%), Gaps = 9/55 (16%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCWI-----GELNGLKGWFPAKFVE 591
+AL DF+ + + L F + + ++ + + H W+ GE G+ PA +V+
Sbjct: 3 RALYDFKSAEPNTLSFSEGETFLLLERSNAHWWLVTNHSGET----GYVPANYVK 53
>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 = 30.7 bits (69), Expect = 0.35
Identities = 16/52 (30%), Positives = 27/52 (51%), Gaps = 2/52 (3%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHC--WIGELNGLKGWFPAKFVEL 592
AL D+ DEL F++ D++T++ + E W L G +G+ P + L
Sbjct: 5 ALWDYSAEFPDELSFKEGDMVTVLRKDGEGTDWWWASLCGREGYVPRNYFGL 56
>gnl|CDD|213017 cd12141, SH3_DNMBP_C2, Second C-terminal Src homology 3 domain of
Dynamin Binding Protein, also called Tuba, and similar
domains. DNMBP or Tuba is a cdc42-specific guanine
nucleotide exchange factor (GEF) that contains four
N-terminal SH3 domains, a central RhoGEF [or Dbl
homology (DH)] domain followed by a Bin/Amphiphysin/Rvs
(BAR) domain, and two C-terminal SH3 domains. It
provides a functional link between dynamin, Rho GTPase
signaling, and actin dynamics. It plays an important
role in regulating cell junction configuration. The
C-terminal SH3 domains of DNMBP bind to N-WASP and
Ena/VASP proteins, which are key regulatory proteins of
the actin cytoskeleton. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 30.5 bits (69), Expect = 0.35
Identities = 14/52 (26%), Positives = 25/52 (48%), Gaps = 4/52 (7%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKD----EHCWIGELNGLKGWFPAKFV 590
A+ F+ +EL N + I+ D + W+ E NG KG+ P+ ++
Sbjct: 4 AVYTFKARSPNELSVSANQRVRILEFSDLTGNKEWWLAEANGQKGYVPSNYI 55
>gnl|CDD|212694 cd11760, SH3_MIA_like, Src Homology 3 domain of Melanoma Inhibitory
Activity protein and similar proteins. MIA is a single
domain protein that adopts a SH3 domain-like fold; it
contains an additional antiparallel beta sheet and two
disulfide bonds compared to classical SH3 domains. MIA
is secreted from malignant melanoma cells and it plays
an important role in melanoma development and invasion.
MIA is expressed by chondrocytes in normal tissues and
may be important in the cartilage cell phenotype. Unlike
classical SH3 domains, MIA does not bind proline-rich
ligands. MIA is a member of the recently identified
family that also includes MIA-like (MIAL), MIA2, and
MIA3 (also called TANGO); the biological functions of
this family are not yet fully understood.
Length = 76
Score = 30.9 bits (70), Expect = 0.40
Identities = 21/62 (33%), Positives = 31/62 (50%), Gaps = 6/62 (9%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQ---KDEHCWIGELNG---LKGWFPAKFVELL 593
RA+AL D+ D L F+K D I + S+ + + W G + G L G+FP V+ L
Sbjct: 13 RARALEDYHGPDCRFLNFKKGDTIYVYSKLAGERQDLWAGSVGGDAGLFGYFPKNLVQEL 72
Query: 594 DE 595
Sbjct: 73 KV 74
>gnl|CDD|213007 cd12074, SH3_Tks5_1, First Src homology 3 domain of Tyrosine kinase
substrate with five SH3 domains. Tks5, also called SH3
and PX domain-containing protein 2A (SH3PXD2A) or Five
SH (FISH), is a scaffolding protein and Src substrate
that is localized in podosomes, which are electron-dense
structures found in Src-transformed fibroblasts,
osteoclasts, macrophages, and some invasive cancer
cells. It binds and regulates some members of the ADAMs
family of transmembrane metalloproteases, which function
as sheddases and mediators of cell and matrix
interactions. It is required for podosome formation,
degradation of the extracellular matrix, and cancer cell
invasion. Tks5 contains an N-terminal Phox homology (PX)
domain and five SH3 domains. This model characterizes
the first SH3 domain of Tks5. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 30.5 bits (68), Expect = 0.41
Identities = 10/46 (21%), Positives = 25/46 (54%)
Query: 546 DFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
++E+ ++ E+ + +V+ +I + + W +GW PA ++E
Sbjct: 7 NYEKQENSEISLQAGEVVDVIEKNESGWWFVSTAEEQGWVPATYLE 52
>gnl|CDD|212766 cd11832, SH3_Shank, Src homology 3 domain of SH3 and multiple
ankyrin repeat domains (Shank) proteins. Shank proteins
carry scaffolding functions through multiple sites of
protein-protein interaction in its domain architecture,
including ankyrin (ANK) repeats, a long proline rich
region, as well as SH3, PDZ, and SAM domains. They bind
a variety of membrane and cytosolic proteins, and exist
in alternatively spliced isoforms. They are highly
enriched in postsynaptic density (PSD) where they
interact with the cytoskeleton and with postsynaptic
membrane receptors including NMDA and glutamate
receptors. They are crucial in the construction and
organization of the PSD and dendritic spines of
excitatory synapses. There are three members of this
family (Shank1, Shank2, Shank3) which show distinct and
cell-type specific patterns of expression. Shank1 is
brain-specific; Shank2 is found in neurons, glia,
endocrine cells, liver, and kidney; Shank3 is widely
expressed. The SH3 domain of Shank binds GRIP, a
scaffold protein that binds AMPA receptors and Eph
receptors/ligands. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 50
Score = 30.1 bits (68), Expect = 0.41
Identities = 11/34 (32%), Positives = 18/34 (52%)
Query: 554 ELGFRKNDVITIISQKDEHCWIGELNGLKGWFPA 587
E+ K D + ++S + W G + G GWFP+
Sbjct: 15 EISLHKGDRVKVLSIGEGGFWEGSVRGRTGWFPS 48
>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 = 30.0 bits (68), Expect = 0.51
Identities = 13/54 (24%), Positives = 23/54 (42%), Gaps = 2/54 (3%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELN--GLKGWFPAKFVEL 592
K L +E DEL + + + +I D W+ N G G+ P +++
Sbjct: 4 CKVLYSYEAQRPDELTITEGEELEVIEDGDGDGWVKARNKSGEVGYVPENYLQF 57
>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 = 30.0 bits (67), Expect = 0.54
Identities = 17/52 (32%), Positives = 26/52 (50%), Gaps = 3/52 (5%)
Query: 542 KALLDFERHDDDELGFRKNDVITIIS--QKDEHCW-IGELNGLKGWFPAKFV 590
+AL F +D+EL F K +V+ +I + D W + NG G P +V
Sbjct: 4 QALYPFSSSNDEELNFEKGEVMDVIEKPENDPEWWKCRKANGQVGLVPKNYV 55
>gnl|CDD|212915 cd11982, SH3_Shank1, Src homology 3 domain of SH3 and multiple
ankyrin repeat domains protein 1. Shank1, also called
SSTRIP (Somatostatin receptor-interacting protein), is a
brain-specific protein that plays a role in the
construction of postsynaptic density (PSD) and the
maturation of dendritic spines. Mice deficient in Shank1
show altered PSD composition, thinner PSDs, smaller
dendritic spines, and weaker basal synaptic
transmission, although synaptic plasticity is normal.
They show increased anxiety and impaired fear memory,
but also show better spatial learning. Shank proteins
carry scaffolding functions through multiple sites of
protein-protein interaction in its domain architecture,
including ankyrin (ANK) repeats, a long proline rich
region, as well as SH3, PDZ, and SAM domains. The SH3
domain of Shank binds GRIP, a scaffold protein that
binds AMPA receptors and Eph receptors/ligands. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 30.0 bits (67), Expect = 0.59
Identities = 14/52 (26%), Positives = 26/52 (50%)
Query: 539 RRAKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFV 590
R A+ ++ + E+ K + I ++S + W G++ G GWFP+ V
Sbjct: 1 RTFMAVKPYQSQAEGEISLSKGEKIKVLSVGEGGFWEGQVKGRVGWFPSDCV 52
>gnl|CDD|213009 cd12076, SH3_Tks4_2, Second Src homology 3 domain of Tyrosine
kinase substrate with four SH3 domains. Tks4, also
called SH3 and PX domain-containing protein 2B
(SH3PXD2B) or HOFI, is a Src substrate and scaffolding
protein that plays an important role in the formation of
podosomes and invadopodia, the dynamic actin-rich
structures that are related to cell migration and cancer
cell invasion. It is required in the formation of
functional podosomes, EGF-induced membrane ruffling, and
lamellipodia generation. It plays an important role in
cellular attachment and cell spreading. Tks4 is
essential for the localization of MT1-MMP (membrane-type
1 matrix metalloproteinase) to invadopodia. It contains
an N-terminal Phox homology (PX) domain and four SH3
domains. This model characterizes the second SH3 domain
of Tks4. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 30.0 bits (67), Expect = 0.62
Identities = 13/41 (31%), Positives = 21/41 (51%)
Query: 551 DDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
D DE+ K V+ +I + E W G +GW PA +++
Sbjct: 13 DQDEINLEKGAVVEVIQKNLEGWWKIRYQGKEGWAPASYLK 53
>gnl|CDD|212938 cd12005, SH3_Lck, Src homology 3 domain of Lck Protein Tyrosine
Kinase. Lck is a member of the Src subfamily of
proteins, which are cytoplasmic (or non-receptor) PTKs.
Lck is expressed in T-cells and natural killer cells. It
plays a critical role in T-cell maturation, activation,
and T-cell receptor (TCR) signaling. Lck phosphorylates
ITAM (immunoreceptor tyr activation motif) sequences on
several subunits of TCRs, leading to the activation of
different second messenger cascades. Phosphorylated
ITAMs serve as binding sites for other signaling factor
such as Syk and ZAP-70, leading to their activation and
propagation of downstream events. In addition, Lck
regulates drug-induced apoptosis by interfering with the
mitochondrial death pathway. The apototic role of Lck is
independent of its primary function in T-cell signaling.
Src kinases contain an N-terminal SH4 domain with a
myristoylation site, followed by SH3 and SH2 domains, a
tyr kinase domain, and a regulatory C-terminal region
containing a conserved tyr. They are activated by
autophosphorylation at the tyr kinase domain, but are
negatively regulated by phosphorylation at the
C-terminal tyr by Csk (C-terminal Src Kinase). The SH3
domain of Src kinases contributes to substrate
recruitment by binding adaptor proteins/substrates, and
regulation of kinase activity through an intramolecular
interaction. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 29.8 bits (67), Expect = 0.66
Identities = 17/50 (34%), Positives = 25/50 (50%), Gaps = 3/50 (6%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGE--LNGLKGWFPAKFV 590
AL +E D +LGF K + + I+ Q E W + G +G+ P FV
Sbjct: 4 ALYSYEPSHDGDLGFEKGEKLRILEQSGE-WWKAQSLTTGQEGFIPFNFV 52
>gnl|CDD|227497 COG5169, HSF1, Heat shock transcription factor [Transcription].
Length = 282
Score = 32.4 bits (74), Expect = 0.94
Identities = 18/110 (16%), Positives = 32/110 (29%), Gaps = 20/110 (18%)
Query: 10 PSHCLHLGLMRVILANRITIPGGPFSALTP------SMWPQDIISKLNQVPEDPNSQPDY 63
+ +L + I A + PF+ +++ + +P
Sbjct: 167 EYNYRNLRTIDDINAMLADLSMSPFADEHLKSFLQELFGAYKEVAEPQSPTQHQRGEPGQ 226
Query: 64 RFDEFGFRVEEEDGPEQNSNKLLSEPFIEDPQHRLQWVAYLEFNSSSANS 113
RF NS L++ E Q VA L+ N S +
Sbjct: 227 RF--------------HNSVVPLADSKNEVDQKGDGKVANLQNNLSLDTA 262
>gnl|CDD|212941 cd12008, SH3_Src, Src homology 3 domain of Src Protein Tyrosine
Kinase. Src (or c-Src) is a cytoplasmic (or
non-receptor) PTK and is the vertebrate homolog of the
oncogenic protein (v-Src) from Rous sarcoma virus.
Together with other Src subfamily proteins, it is
involved in signaling pathways that regulate cytokine
and growth factor responses, cytoskeleton dynamics, cell
proliferation, survival, and differentiation. Src also
play a role in regulating cell adhesion, invasion, and
motility in cancer cells, and tumor vasculature,
contributing to cancer progression and metastasis.
Elevated levels of Src kinase activity have been
reported in a variety of human cancers. Several
inhibitors of Src have been developed as anti-cancer
drugs. Src is also implicated in acute inflammatory
responses and osteoclast function. Src kinases contain
an N-terminal SH4 domain with a myristoylation site,
followed by SH3 and SH2 domains, a tyr kinase domain,
and a regulatory C-terminal region containing a
conserved tyr. They are activated by autophosphorylation
at the tyr kinase domain, but are negatively regulated
by phosphorylation at the C-terminal tyr by Csk
(C-terminal Src Kinase). The SH3 domain of Src kinases
contributes to substrate recruitment by binding adaptor
proteins/substrates, and regulation of kinase activity
through an intramolecular interaction. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 29.3 bits (65), Expect = 1.1
Identities = 13/50 (26%), Positives = 26/50 (52%), Gaps = 2/50 (4%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGE--LNGLKGWFPAKFV 590
AL D+E + +L F+K + + I++ + W+ G G+ P+ +V
Sbjct: 4 ALYDYESRTETDLSFKKGERLQIVNNTEGDWWLAHSLTTGQTGYIPSNYV 53
>gnl|CDD|212707 cd11773, SH3_Sla1p_1, First Src Homology 3 domain of the fungal
endocytic adaptor protein Sla1p. Sla1p facilitates
endocytosis by playing a role as an adaptor protein in
coupling components of the actin cytoskeleton to the
endocytic machinery. It interacts with Abp1p, Las17p and
Pan1p, which are activator proteins of actin-related
protein 2/3 (Arp2/3). Sla1p contains multiple domains
including three SH3 domains, a SAM (sterile alpha motif)
domain, and a Sla1 homology domain 1 (SHD1), which binds
to the NPFXD motif that is found in many integral
membrane proteins such as the Golgi-localized
Arf-binding protein Lsb5p and the P4-ATPases, Drs2p and
Dnf1p. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 29.3 bits (66), Expect = 1.1
Identities = 12/40 (30%), Positives = 24/40 (60%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNG 580
KAL D+E +DEL +++D++ ++ + D+ W +L
Sbjct: 2 YKALYDYEPQTEDELTIQEDDILYLLEKSDDDWWKVKLKV 41
>gnl|CDD|212813 cd11880, SH3_Caskin, Src Homology 3 domain of CASK interacting
protein. Caskin proteins are multidomain adaptor
proteins that contain six ankyrin repeats, a single SH3
domain, tandem sterile alpha motif (SAM) domains, and a
long disordered proline-rich region. There are two
Caskin proteins called Caskin1 and Caskin2. Caskin1
binds to the multidomain scaffolding protein CASK
through the CaM domain in competition with
Munc-interacting protein 1 (Mint1). CASK participates in
one of two evolutionarily conserved tripartite complexes
containing either Mint1 and Velis or Caskin1 and Velis.
Caskin1 may play a role in infantile myoclonic epilepsy.
There is not much known about Caskin2; despite sharing a
domain architecture with Caskin1, Caskin2 does not bind
CASK. SH3 domains bind to proline-rich ligands with
moderate affinity and selectivity, preferentially to
PxxP motifs; they play a role in the regulation of
enzymes by intramolecular interactions, changing the
subcellular localization of signal pathway components
and mediate multiprotein complex assemblies.
Length = 61
Score = 29.4 bits (66), Expect = 1.1
Identities = 18/59 (30%), Positives = 27/59 (45%), Gaps = 7/59 (11%)
Query: 540 RAKALLDF-ERHDDDELGFRKNDVITIISQKDEHCWIGEL------NGLKGWFPAKFVE 591
+ +A D+ HD L R D+IT++ Q + W G + N G+FP VE
Sbjct: 2 QVRATKDYWNNHDLTALNVRAGDIITVLEQHPDGRWKGHIHDNQTGNDRVGYFPPSLVE 60
>gnl|CDD|212925 cd11992, SH3_Intersectin2_3, Third Src homology 3 domain (or SH3C)
of Intersectin-2. Intersectin-2 (ITSN2) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN2 also functions as a specific GEF for Cdc42
activation in epithelial morphogenesis, and is required
in mitotic spindle orientation. It exists in
alternatively spliced short and long isoforms. The short
isoform contains two Eps15 homology domains (EH1 and
EH2), a coiled-coil region and five SH3 domains
(SH3A-E), while the long isoform, in addition, contains
RhoGEF (also called Dbl-homologous or DH), Pleckstrin
homology (PH) and C2 domains. The third SH3 domain
(SH3C) of ITSN2 has been shown to bind the K15 protein
of Kaposi's sarcoma-associated herpesvirus. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 29.2 bits (65), Expect = 1.2
Identities = 14/49 (28%), Positives = 25/49 (51%), Gaps = 1/49 (2%)
Query: 543 ALLDFERHDDDELGFRKNDVITIISQKDEHCWIGELNGLKGWFPAKFVE 591
AL + + +L F + + I +++QKD W G + G FP+ +V
Sbjct: 4 ALYPYSSSEPGDLTFNEGEEI-LVTQKDGEWWTGSIEDRTGIFPSNYVR 51
>gnl|CDD|212844 cd11911, SH3_CIP4-like, Src Homology 3 domain of Cdc42-Interacting
Protein 4. This subfamily is composed of
Cdc42-Interacting Protein 4 (CIP4), Formin Binding
Protein 17 (FBP17), FormiN Binding Protein 1-Like
(FNBP1L), and similar proteins. CIP4 and FNBP1L are
Cdc42 effectors that bind Wiskott-Aldrich syndrome
protein (WASP) and function in endocytosis. CIP4 and
FBP17 bind to the Fas ligand and may be implicated in
the inflammatory response. CIP4 may also play a role in
phagocytosis. It functions downstream of Cdc42 in
PDGF-dependent actin reorganization and cell migration,
and also regulates the activity of PDGFRbeta. It uses
Src as a substrate in regulating the invasiveness of
breast tumor cells. CIP4 may also play a role in the
pathogenesis of Huntington's disease. Members of this
subfamily typically contain an N-terminal F-BAR
(FES-CIP4 Homology and Bin/Amphiphysin/Rvs) domain, a
central Cdc42-binding HR1 domain, and a C-terminal SH3
domain. The SH3 domain of CIP4 associates with Gapex-5,
a Rab31 GEF. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 29.1 bits (66), Expect = 1.2
Identities = 11/55 (20%), Positives = 27/55 (49%), Gaps = 2/55 (3%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQKDEHCW--IGELNGLKGWFPAKFVEL 592
AL DF+ + L + +++ ++ + W + + NG +G+ P ++E+
Sbjct: 1 TCTALYDFDGTSEGTLSMEEGEILLVLEEDGGDGWTRVRKNNGDEGYVPTSYIEV 55
>gnl|CDD|221305 pfam11905, DUF3425, Domain of unknown function (DUF3425). This
presumed domain is functionally uncharacterized. This
domain is found in eukaryotes. This domain is typically
between 120 to 143 amino acids in length.
Length = 131
Score = 30.8 bits (70), Expect = 1.3
Identities = 25/98 (25%), Positives = 40/98 (40%), Gaps = 6/98 (6%)
Query: 502 FLTTDPRLSHASLTPNYSP--ESHQSDHDAYADVSRSRQRRAKALLDFERHDDDELGFRK 559
+L + ++A L P P H + D+ Q R + + +F+ +D+DEL
Sbjct: 7 WLISPSPENYARLPPFLRPTPLQLTIPHHPWIDLLPWPQLRDRLIRNFDLYDEDEL---C 63
Query: 560 NDVITIISQKDEHCWIGELNGLKGWFPAKFVELLDERS 597
D++ I D GE GL W PA D +
Sbjct: 64 RDLMGCIRVWDGEDLEGE-GGLLVWGPAFDGTFWDLSN 100
>gnl|CDD|212848 cd11915, SH3_Irsp53, Src Homology 3 domain of Insulin Receptor
tyrosine kinase Substrate p53. IRSp53 is also known as
BAIAP2 (Brain-specific Angiogenesis Inhibitor
1-Associated Protein 2). It is a scaffolding protein
that takes part in many signaling pathways including
Cdc42-induced filopodia formation, Rac-mediated
lamellipodia extension, and spine morphogenesis. IRSp53
exists as multiple splicing variants that differ mainly
at the C-termini. One variant (T-form) is expressed
exclusively in human breast cancer cells. The gene
encoding IRSp53 is a putative susceptibility gene for
Gilles de la Tourette syndrome. IRSp53 can also mediate
the recruitment of effector proteins Tir and EspFu,
which regulate host cell actin reorganization, to
bacterial attachment sites. It contains an N-terminal
IMD, a CRIB (Cdc42 and Rac interactive binding motif),
an SH3 domain, and a WASP homology 2 (WH2) actin-binding
motif at the C-terminus. The SH3 domain of IRSp53 has
been shown to bind the proline-rich C-terminus of EspFu.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 29.2 bits (65), Expect = 1.4
Identities = 15/58 (25%), Positives = 27/58 (46%), Gaps = 4/58 (6%)
Query: 540 RAKALLDFERHDDDEL-GFRKNDVITIISQKDEHCW---IGELNGLKGWFPAKFVELL 593
R +A+ D+ L F++ D IT++ + W E ++GWFP + +L
Sbjct: 2 RVQAIFSHAAGDNSTLLSFKEGDYITLLVPEARDGWHYGECEKTKMRGWFPFSYTRVL 59
>gnl|CDD|152769 pfam12334, rOmpB, Rickettsia outer membrane protein B. This domain
family is found in bacteria, and is approximately 220
amino acids in length. The family is found in
association with pfam03797. This family is the middle
region of one of the outer membrane proteins of
Rickettsia which is involved in adhesion to eukaryotic
cells for uptake.
Length = 217
Score = 31.7 bits (72), Expect = 1.5
Identities = 17/48 (35%), Positives = 25/48 (52%), Gaps = 5/48 (10%)
Query: 343 IVLFHSCEPVLVTLENSAEIFNALSDI----PGDIVDIDNLLEVGAEI 386
IV F + +P+ VTL A +AL I PG++V I+ + G E
Sbjct: 109 IVEFVNTDPITVTLNKQAAPVDALKQITVSGPGNVV-INEIGNAGNEH 155
>gnl|CDD|212927 cd11994, SH3_Intersectin2_4, Fourth Src homology 3 domain (or SH3D)
of Intersectin-2. Intersectin-2 (ITSN2) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN2 also functions as a specific GEF for Cdc42
activation in epithelial morphogenesis, and is required
in mitotic spindle orientation. It exists in
alternatively spliced short and long isoforms. The short
isoform contains two Eps15 homology domains (EH1 and
EH2), a coiled-coil region and five SH3 domains
(SH3A-E), while the long isoform, in addition, contains
RhoGEF (also called Dbl-homologous or DH), Pleckstrin
homology (PH) and C2 domains. The fourth SH3 domain (or
SH3D) of ITSN2 is expected to bind protein partners,
similar to ITSN1 which has been shown to bind SHIP2,
Numb, CdGAP, and N-WASP. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 59
Score = 29.1 bits (65), Expect = 1.5
Identities = 16/46 (34%), Positives = 23/46 (50%), Gaps = 5/46 (10%)
Query: 553 DELGFRKNDVITIISQKDEHCWIGELNGL-----KGWFPAKFVELL 593
++L +I I+ + W+GEL KGWFPA V+LL
Sbjct: 14 EQLSLSPGQLILILKKNSSGWWLGELQARGKKRQKGWFPASHVKLL 59
>gnl|CDD|212873 cd11940, SH3_ARHGEF5_19, Src homology 3 domain of the Rho guanine
nucleotide exchange factors ARHGEF5 and ARHGEF19.
ARHGEF5, also called ephexin-3 or TIM (Transforming
immortalized mammary oncogene), is a potent activator of
RhoA and it plays roles in regulating cell shape,
adhesion, and migration. It binds to the SH3 domain of
Src and is involved in regulating Src-induced podosome
formation. ARHGEF19, also called ephexin-2 or WGEF
(weak-similarity GEF), is highly expressed in the
intestine, liver, heart and kidney. It activates RhoA,
Cdc42, and Rac 1, and has been shown to activate RhoA in
the Wnt-PCP (planar cell polarity) pathway. It is
involved in the regulation of cell polarity and
cytoskeletal reorganization. ARHGEF5 and ARHGEF19
contain RhoGEF (also called Dbl-homologous or DH),
Pleckstrin Homology (PH), and SH3 domains. The SH3
domains of ARHGEFs play an autoinhibitory role through
intramolecular interactions with a proline-rich region
N-terminal to the DH domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 29.0 bits (65), Expect = 1.5
Identities = 15/43 (34%), Positives = 22/43 (51%), Gaps = 4/43 (9%)
Query: 553 DELGFRKNDVITIISQKDEHCWIGEL---NGLKGWFPAKFVEL 592
DEL K D+I + Q + W+ + +G +GWFP VE
Sbjct: 14 DELTLEKADIIMVRQQSSDG-WLEGVRLSDGERGWFPQSHVEE 55
>gnl|CDD|212872 cd11939, SH3_ephexin1, Src homology 3 domain of the Rho guanine
nucleotide exchange factor, ephexin-1 (also called NGEF
or ARHGEF27). Ephexin-1, also called NGEF (neuronal
GEF) or ARHGEF27, activates RhoA, Tac1, and Cdc42 by
exchanging bound GDP for free GTP. It is expressed
mainly in the brain in a region associated with movement
control. It regulates the stability of postsynaptic
acetylcholine receptor (AChR) clusters and thus, plays a
critical role in the maturation and neurotransmission of
neuromuscular junctions. Ephexin-1 directly interacts
with the ephrin receptor EphA4 and their coexpression
enhances the ability of ephexin-1 to activate RhoA. It
is required for normal axon growth and EphA-induced
growth cone collapse. Ephexin-1 contains RhoGEF (also
called Dbl-homologous or DH), Pleckstrin Homology (PH),
and SH3 domains. The SH3 domains of ARHGEFs play an
autoinhibitory role through intramolecular interactions
with a proline-rich region N-terminal to the DH domain.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 28.8 bits (64), Expect = 1.5
Identities = 15/41 (36%), Positives = 22/41 (53%), Gaps = 2/41 (4%)
Query: 553 DELGFRKNDVITIISQKDEHCWIGEL--NGLKGWFPAKFVE 591
DEL DV+ I+ + D+ GE + +GWFP+ VE
Sbjct: 14 DELSLELADVLNILDKTDDGWIFGERLHDQERGWFPSSVVE 54
>gnl|CDD|212812 cd11879, SH3_Bem1p_2, Second Src Homology 3 domain of Bud emergence
protein 1 and similar domains. Members of this
subfamily bear similarity to Saccharomyces cerevisiae
Bem1p, containing two Src Homology 3 (SH3) domains at
the N-terminus, a central PX domain, and a C-terminal
PB1 domain. Bem1p is a scaffolding protein that is
critical for proper Cdc42p activation during bud
formation in yeast. During budding and mating, Bem1p
migrates to the plasma membrane where it can serve as an
adaptor for Cdc42p and some other proteins. Bem1p also
functions as an effector of the G1 cyclin Cln3p and the
cyclin-dependent kinase Cdc28p in promoting vacuolar
fusion. SH3 domains bind to proline-rich ligands with
moderate affinity and selectivity, preferentially to
PxxP motifs; they play a role in the regulation of
enzymes by intramolecular interactions, changing the
subcellular localization of signal pathway components
and mediate multiprotein complex assemblies.
Length = 56
Score = 28.8 bits (65), Expect = 1.6
Identities = 19/57 (33%), Positives = 24/57 (42%), Gaps = 7/57 (12%)
Query: 541 AKALLDFERHDDDELGFRKNDVITIISQKDEHCW-----IGELNGLKGWFPAKFVEL 592
L DF+ DEL + D I I + + W IG L G G P FVE+
Sbjct: 2 GIVLYDFKAERPDELDAKAGDAIIICAHSNYE-WFVAKPIGRL-GGPGLIPVSFVEI 56
>gnl|CDD|212781 cd11847, SH3_Brk, Src homology 3 domain of Brk (Breast tumor
kinase) Protein Tyrosine Kinase (PTK), also called PTK6.
Brk is a cytoplasmic (or non-receptor) PTK with limited
homology to Src kinases. It has been found to be
overexpressed in a majority of breast tumors. It plays
roles in normal cell differentiation, proliferation,
survival, migration, and cell cycle progression. Brk
substrates include RNA-binding proteins (SLM-1/2,
Sam68), transcription factors (STAT3/5), and signaling
molecules (Akt, paxillin, IRS-4). Src kinases in general
contain an N-terminal SH4 domain with a myristoylation
site, followed by SH3 and SH2 domains, a tyr kinase
domain, and a regulatory C-terminal region containing a
conserved tyr; they are activated by autophosphorylation
at the tyr kinase domain, but are negatively regulated
by phosphorylation at the C-terminal tyr by Csk
(C-terminal Src Kinase). However, Brk lacks the
N-terminal myristoylation site. The SH3 domain of Src
kinases contributes to substrate recruitment by binding
adaptor proteins/substrates, and regulation of kinase
activity through an intramolecular interaction. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 28.7 bits (64), Expect = 1.6
Identities = 11/33 (33%), Positives = 16/33 (48%)
Query: 542 KALLDFERHDDDELGFRKNDVITIISQKDEHCW 574
KAL DF+ D+EL F+ D I + +
Sbjct: 3 KALWDFKARGDEELSFQAGDQFRIAERSGDWWT 35
>gnl|CDD|221271 pfam11856, DUF3376, Protein of unknown function (DUF3376). This
family of proteins are functionally uncharacterized.
This protein is found in bacteria. Proteins in this
family are typically between 770 to 1142 amino acids in
length.
Length = 474
Score = 31.7 bits (72), Expect = 1.9
Identities = 26/135 (19%), Positives = 37/135 (27%), Gaps = 9/135 (6%)
Query: 360 AEIFNALSDIPGDIVDIDNLLEVGAEIFNALSDI-PGDIVDIDNLLEVSFSVSTSISQSL 418
A + ALSD+P D L ++ L I +++ F T L
Sbjct: 2 ATLRGALSDVPRTQPIRDRLEQIARYSRRRLRAIVDALRPEVERREAAEFG-RTLFLARL 60
Query: 419 IDSHRRRHLAFLMSDQGALIGNPALSNNLPKQQLNRLGRILRSLFTLAFGCFLGQTAVAR 478
R R Q A P +L IL L L Q+ A
Sbjct: 61 -TPLRLRRW--RARPQQAAALG--AGYAYPAYHQLKLSGILDRLAELLDA--ALQSLPAA 113
Query: 479 QATPARPQILVDLRE 493
++ R
Sbjct: 114 DPAARIRALVEAWRR 128
>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 = 28.4 bits (64), Expect = 2.3
Identities = 17/56 (30%), Positives = 24/56 (42%), Gaps = 3/56 (5%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITIISQ--KDEHCWIGE-LNGLKGWFPAKFVEL 592
AL F +D+EL F K + + II + D W G G P +VE+
Sbjct: 1 VVVALYPFTGENDEELSFEKGERLEIIEKPEDDPDWWKARNALGTTGLVPRNYVEV 56
>gnl|CDD|162338 TIGR01398, FlhA, flagellar biosynthesis protein FlhA. This model
describes flagellar biosynthesis protein FlhA, one of a
large number of genes associated with the biosynthesis
of functional bacterial flagella. Homologs of many such
proteins, including FlhA, function in type III protein
secretion systems. A separate model describes InvA
(Salmonella enterica), LcrD (Yersinia enterocolitica),
HrcV (Xanthomonas), etc., all of which score below the
noise cutoff for this model [Cellular processes,
Chemotaxis and motility].
Length = 678
Score = 31.1 bits (71), Expect = 3.0
Identities = 36/173 (20%), Positives = 61/173 (35%), Gaps = 35/173 (20%)
Query: 354 VTLENSAEIFNALSDIPGDIVDIDNLLEVGAEIFNALS-DIPGDIVDIDNLLEVSFSVST 412
V++ N I L+D D D L+E + L I +D D +L V ++
Sbjct: 533 VSIRNLPTILETLADYAPITKDPDLLVEH---VRQRLGRQITQQYLDEDGVLPV-ITLDP 588
Query: 413 SISQSLIDSHRRRHLAFLMSDQGALIGNPALSNNLPKQQLNRLGRILRSLFTLAFGCFLG 472
+ +L ++ +R +G L+ L L L R +R
Sbjct: 589 DLEAALAEALQR-------DGEGELLD-------LEPALLEELVRAVRK----------- 623
Query: 473 QTAVARQATPARPQILV---DLREATCQIGRHFLTTDPRLSHASLTPNYSPES 522
AV + A +L+ +R +I F P LS+ + N E+
Sbjct: 624 --AVEKLANNGERPVLLTSPRVRPYVRRILERFFPELPVLSYNEIPDNVRVET 674
>gnl|CDD|213016 cd12140, SH3_Amphiphysin_I, Src Homology 3 domain of Amphiphysin I.
Amphiphysins function primarily in endocytosis and
other membrane remodeling events. They exist in several
isoforms and mammals possess two amphiphysin proteins
from distinct genes. Amphiphysin I proteins, enriched in
the brain and nervous system, contain domains that bind
clathrin, Adaptor Protein complex 2 (AP2), dynamin, and
synaptojanin. They function in synaptic vesicle
endocytosis. Human autoantibodies to amphiphysin I
hinder GABAergic signaling and contribute to the
pathogenesis of paraneoplastic stiff-person syndrome.
Amphiphysins contain an N-terminal BAR domain with an
additional N-terminal amphipathic helix (an N-BAR), a
variable central domain, and a C-terminal SH3 domain.
The SH3 domain of amphiphysins bind proline-rich motifs
present in binding partners such as dynamin,
synaptojanin, and nsP3. It also belongs to a subset of
SH3 domains that bind ubiquitin in a site that overlaps
with the peptide binding site. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 72
Score = 28.3 bits (63), Expect = 3.4
Identities = 15/69 (21%), Positives = 29/69 (42%), Gaps = 15/69 (21%)
Query: 540 RAKALLDFERHDDDELGFRKNDVITII----SQKDEHCWIG-----------ELNGLKGW 584
+ + L DFE + DEL ++ D++ ++ + + W+ + + KG
Sbjct: 4 KVETLHDFEAANSDELELKRGDIVLVVPSETAADQDAGWLTGVKESDWLQYRDASAYKGL 63
Query: 585 FPAKFVELL 593
FP F L
Sbjct: 64 FPENFTRRL 72
>gnl|CDD|222259 pfam13608, Potyvirid-P3, Protein P3 of Potyviral polyprotein. This
is the P3 protein section of the Potyviridae
polyproteins. The function is not known except that the
protein is essential to viral survival.
Length = 445
Score = 31.0 bits (71), Expect = 3.4
Identities = 20/100 (20%), Positives = 34/100 (34%), Gaps = 10/100 (10%)
Query: 135 KLRSMTRQGIPHSLRPQLWLRLSGALEKKALSKIKYQDIVKASSSDALAFAKQIEKDLLR 194
KL ++ R S + + + K KY V A A K +++
Sbjct: 163 KLSAIWR-----SRKFRKRSEKCLKPKAAEDLKGKYSISVTACFGKAKQRLKAAVSSVVQ 217
Query: 195 TMPTNACFSTFSSTGVPRLRRILRALAWLFPDIGGVVNAL 234
+ + S S + + LR + PDI +N L
Sbjct: 218 KV-SKGVSSVVRSV----VNKALRTIKRCLPDIFKFINVL 252
>gnl|CDD|204089 pfam08900, DUF1845, Domain of unknown function (DUF1845). This
family of proteins are functionally uncharacterized.
Length = 217
Score = 29.9 bits (68), Expect = 5.2
Identities = 13/55 (23%), Positives = 18/55 (32%), Gaps = 14/55 (25%)
Query: 436 ALIGNPALSNNLPKQQLNRLGRILRSLFTLA-----FGC----FLGQTAVARQAT 481
LI L+ GR++R +F L G F A A+ A
Sbjct: 142 GLISRQQAE-----DWLDEGGRLVRRVFGLVQRYRFSGVTRDDFAANNARAQAAI 191
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
0.321 0.137 0.426
Gapped
Lambda K H
0.267 0.0772 0.140
Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 44354
Number of Hits to DB: 48,803,072
Number of extensions: 4920147
Number of successful extensions: 4242
Number of sequences better than 10.0: 1
Number of HSP's gapped: 4175
Number of HSP's successfully gapped: 239
Length of query: 940
Length of database: 10,937,602
Length adjustment: 106
Effective length of query: 834
Effective length of database: 6,236,078
Effective search space: 5200889052
Effective search space used: 5200889052
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.4 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.9 bits)
S2: 64 (28.3 bits)