RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy8789
(851 letters)
>gnl|CDD|176501 cd08558, PI-PLCc_eukaryota, Catalytic domain of eukaryotic
phosphoinositide-specific phospholipase C and similar
proteins. This family corresponds to the catalytic
domain present in eukaryotic phosphoinositide-specific
phospholipase C (PI-PLC, EC 3.1.4.11) and similar
proteins. The higher eukaryotic PI-PLCs play a critical
role in most signal transduction pathways, controlling
numerous cellular events such as cell growth,
proliferation, excitation and secretion. They strictly
require Ca2+ for the catalytic activity. They display a
clear preference towards the hydrolysis of the more
highly phosphorylated membrane phospholipids
PI-analogues, phosphatidylinositol 4,5-bisphosphate
(PIP2) and phosphatidylinositol-4-phosphate (PIP), to
generate two important second messengers in eukaryotic
signal transduction cascades, inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. The
eukaryotic PI-PLCs have a multidomain organization that
consists of a PLC catalytic core domain, and various
regulatory domains, such as the pleckstrin homology (PH)
domain, EF-hand motif, and C2 domain. The catalytic core
domain is a TIM barrel with two highly conserved regions
(X and Y) split by a linker region. The catalytic
mechanism of eukaryotic PI-PLCs is based on general base
and acid catalysis utilizing two well conserved
histidines and consists of two steps, a phosphotransfer
and a phosphodiesterase reaction. The mammalian PI-PLCs
consist of 13 isozymes, which are classified into
six-subfamilies, PI-PLC-delta (1,3 and 4), -beta(1-4),
-gamma(1,2), -epsilon, -zeta, and -eta (1,2). Ca2+ is
required for the activation of all forms of mammalian
PI-PLCs, and the concentration of calcium influences
substrate specificity. This family also includes
metazoan phospholipase C related but catalytically
inactive proteins (PRIP), which belong to a group of
novel inositol trisphosphate binding proteins. Due to
the replacement of critical catalytic residues, PRIP
does not have PLC enzymatic activity.
Length = 226
Score = 321 bits (826), Expect = e-104
Identities = 100/147 (68%), Positives = 125/147 (85%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIV 324
+QDMT+PLSHYFI+SSHNTYLTGDQ + ESS EAY+R L +GCRC+ELDCWDGPDG P+V
Sbjct: 1 YQDMTQPLSHYFISSSHNTYLTGDQLTGESSVEAYIRALLRGCRCVELDCWDGPDGEPVV 60
Query: 325 YHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLL 384
YHGHTLT+KI FKDV++ I+++AF TS YPVILS+E++CSL QQ+ MAQI+ +IF D LL
Sbjct: 61 YHGHTLTSKILFKDVIEAIKEYAFVTSPYPVILSLENHCSLEQQKKMAQILKEIFGDKLL 120
Query: 385 IHPVEKNETVLPSPHQLRGKILLKHKK 411
P+++N LPSP QL+GKIL+K KK
Sbjct: 121 TPPLDENPVQLPSPEQLKGKILIKGKK 147
>gnl|CDD|176534 cd08592, PI-PLCc_gamma, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-gamma. This
family corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-gamma isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-gamma represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C2 domain.The PLC
catalytic core domain is a TIM barrel with two highly
conserved regions (X and Y) split by a highly degenerate
linker sequence. Unique to PI-PLC-gamma, a second PH
domain, two SH2 (Src homology 2) regions, and one SH3
(Src homology 3) region is present within this linker
region. There are two PI-PLC-gamma isozymes (1-2). They
are activated by receptor and non-receptor tyrosine
kinases due to the presence of two SH2 and a single SH3
domain within the linker region. Aside from the two
PI-PLC-gamma isozymes identified in mammals, some
eukaryotic PI-PLC-gamma homologs have been classified
with this subfamily.
Length = 229
Score = 305 bits (782), Expect = 4e-98
Identities = 112/161 (69%), Positives = 130/161 (80%), Gaps = 7/161 (4%)
Query: 266 QDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVY 325
QDM PLSHY+I SSHNTYLTGDQ SSESS EAY RCLR GCRCIELDCWDGPDG PI+Y
Sbjct: 2 QDMNNPLSHYWIASSHNTYLTGDQLSSESSLEAYARCLRMGCRCIELDCWDGPDGMPIIY 61
Query: 326 HGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLLI 385
HGHTLT+KIKF DV+KTI++HAF TS+YPVILSIE++CSLPQQR MAQ ++F DMLL
Sbjct: 62 HGHTLTSKIKFMDVLKTIKEHAFVTSEYPVILSIENHCSLPQQRNMAQAFKEVFGDMLLT 121
Query: 386 HPVEKNETVLPSPHQLRGKILLKHKKL-------PEGSDEQ 419
PV++N LPSP+QL+ KI++KHKKL PE E+
Sbjct: 122 QPVDRNADQLPSPNQLKRKIIIKHKKLFYEMSSFPETKAEK 162
>gnl|CDD|215892 pfam00388, PI-PLC-X, Phosphatidylinositol-specific phospholipase C,
X domain. This associates with pfam00387 to form a
single structural unit.
Length = 145
Score = 272 bits (697), Expect = 7e-87
Identities = 91/145 (62%), Positives = 121/145 (83%), Gaps = 1/145 (0%)
Query: 268 MTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVYHG 327
M++PLSHYFI+SSHNTYLTGDQ + +SS EAY++ L +GCRC+ELDCWDGPDG P+VYHG
Sbjct: 1 MSQPLSHYFISSSHNTYLTGDQLTGKSSVEAYIQALLRGCRCVELDCWDGPDGEPVVYHG 60
Query: 328 HTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLLIHP 387
+TLT+KI F+DV++ I+++AF TS+YPVILS+E++CS QQ MA+I+ +IF DML P
Sbjct: 61 YTLTSKIPFRDVLEAIKEYAFVTSEYPVILSLENHCSPEQQAKMAEILKEIFGDMLYTPP 120
Query: 388 V-EKNETVLPSPHQLRGKILLKHKK 411
+ +++ T LPSP L+GKILLK KK
Sbjct: 121 LDDESSTELPSPEDLKGKILLKVKK 145
>gnl|CDD|176535 cd08593, PI-PLCc_delta, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-delta. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-delta isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-delta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C-terminal C2 domain.
This CD corresponds to the catalytic domain which is a
TIM barrel with two highly conserved regions (X and Y)
split by a highly degenerate linker sequence. There are
three PI-PLC-delta isozymes (1,3 and 4). PI-PLC-delta1
is relatively well characterized. It is activated by
high calcium levels generated by other PI-PLC family
members, and therefore functions as a calcium amplifier
within the cell. Different PI-PLC-delta isozymes have
different tissue distribution and different subcellular
locations. PI-PLC-delta1 is mostly a cytoplasmic
protein, PI-PLC-delta3 is located in the membrane, and
PI-PLC-delta4 is predominantly detected in the cell
nucleus. Aside from three PI-PLC-delta isozymes
identified in mammals, some eukaryotic PI-PLC-delta
homologs have been classified to this CD.
Length = 257
Score = 274 bits (703), Expect = 3e-86
Identities = 98/156 (62%), Positives = 122/156 (78%), Gaps = 3/156 (1%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIV 324
+QDMT+PLSHYFI SSHNTYL DQ SS EAY+R L++GCRC+ELDCWDGPDG PI+
Sbjct: 1 YQDMTQPLSHYFIASSHNTYLLEDQLKGPSSTEAYIRALKKGCRCVELDCWDGPDGEPII 60
Query: 325 YHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLL 384
YHGHTLT+KI FKDV++ IR++AF+ S YPVILS+E++CS+ QQ+VMAQ + I D LL
Sbjct: 61 YHGHTLTSKILFKDVIQAIREYAFKVSPYPVILSLENHCSVEQQKVMAQHLKSILGDKLL 120
Query: 385 IHPVEKNETVLPSPHQLRGKILLKHKKL---PEGSD 417
P++ T LPSP +L+GKIL+K KKL E SD
Sbjct: 121 TQPLDGVLTALPSPEELKGKILVKGKKLKLAKELSD 156
>gnl|CDD|176540 cd08598, PI-PLC1c_yeast, Catalytic domain of putative yeast
phosphatidylinositide-specific phospholipases C. This
family corresponds to the catalytic domain present in a
group of putative phosphoinositide-specific
phospholipase C (PI-PLC, EC 3.1.4.11) encoded by PLC1
genes from yeasts, which are homologs of the delta
isoforms of mammalian PI-PLC in terms of overall
sequence similarity and domain organization. Mammalian
PI-PLC is a signaling enzyme that hydrolyzes the
membrane phospholipids
phosphatidylinositol-4,5-bisphosphate (PIP2) to
generate two important second messengers in eukaryotic
signal transduction cascades, inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. The prototype of this CD
is protein Plc1p encoded by PLC1 genes from
Saccharomyces cerevisiae. Plc1p contains both highly
conserved X- and Y- regions of PLC catalytic core
domain, as well as a presumptive EF-hand like calcium
binding motif. Experiments show that Plc1p displays
calcium dependent catalytic properties with high
similarity to those of the mammalian PLCs, and plays
multiple roles in modulating the membrane/protein
interactions in filamentation control. CaPlc1p encoded
by CAPLC1 from the closely related yeast Candida
albicans, an orthologue of S. cerevisiae Plc1p, is also
included in this group. Like Plc1p, CaPlc1p has
conserved presumptive catalytic domain, shows PLC
activity when expressed in E. coli, and is involved in
multiple cellular processes. There are two other gene
copies of CAPLC1 in C. albicans, CAPLC2 (also named as
PIPLC) and CAPLC3. Experiments show CaPlc1p is the only
enzyme in C. albicans which functions as PLC. The
biological functions of CAPLC2 and CAPLC3 gene products
must be clearly different from CaPlc1p, but their exact
roles remain unclear. Moreover, CAPLC2 and CAPLC3 gene
products are more similar to extracellular bacterial
PI-PLC than to the eukaryotic PI-PLC, and they are not
included in this subfamily.
Length = 231
Score = 246 bits (630), Expect = 6e-76
Identities = 77/148 (52%), Positives = 109/148 (73%)
Query: 266 QDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVY 325
+D+++PL+ YFI+SSHNTYL G Q + +SS E Y+R L++GCRC+E+D WDG DG P+V
Sbjct: 2 EDLSRPLNEYFISSSHNTYLLGRQLAGDSSVEGYIRALQRGCRCVEIDVWDGDDGEPVVT 61
Query: 326 HGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLLI 385
HG+TLT+ + F+DV + I+ +AF TS YP+ILS+E +C QQ M +IM + F D+L+
Sbjct: 62 HGYTLTSSVPFRDVCRAIKKYAFVTSPYPLILSLEVHCDAEQQERMVEIMKETFGDLLVT 121
Query: 386 HPVEKNETVLPSPHQLRGKILLKHKKLP 413
P++ E LPSP +LRGKIL+K KK
Sbjct: 122 EPLDGLEDELPSPEELRGKILIKVKKES 149
>gnl|CDD|176539 cd08597, PI-PLCc_PRIP_metazoa, Catalytic domain of metazoan
phospholipase C related, but catalytically inactive
protein. This family corresponds to the catalytic
domain present in metazoan phospholipase C related, but
catalytically inactive proteins (PRIP), which belong to
a group of novel Inositol 1,4,5-trisphosphate (InsP3)
binding protein. PRIP has a primary structure and domain
architecture, incorporating a pleckstrin homology (PH)
domain, an array of EF hands, a PLC catalytic core
domain with highly conserved X- and Y-regions split by a
linker sequence, and a C-terminal C2 domain, similar to
phosphoinositide-specific phospholipases C (PI-PLC, EC
3.1.4.11)-delta isoforms. Due to replacement of critical
catalytic residues, PRIP do not have PLC enzymatic
activity. PRIP consists of two subfamilies,
PRIP-1(previously known as p130 or PLC-1), which is
predominantly expressed in the brain, and PRIP-2
(previously known as PLC-2), which exhibits a relatively
ubiquitous expression. Experiments show both, PRIP-1 and
PRIP-2, are involved in InsP3-mediated calcium signaling
pathway and GABA(A)receptor-mediated signaling pathway.
In addition, PRIP-2 acts as a negative regulator of
B-cell receptor signaling and immune responses.
Length = 260
Score = 244 bits (625), Expect = 6e-75
Identities = 89/148 (60%), Positives = 113/148 (76%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIV 324
QDMT+PLSHYFI SSHNTYL DQ SS E YVR L++GCRC+ELDCWDGP+G P++
Sbjct: 1 CQDMTQPLSHYFIASSHNTYLIEDQLRGPSSVEGYVRALQRGCRCVELDCWDGPNGEPVI 60
Query: 325 YHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLL 384
YHGHTLT+KI F+ V++ I ++AF S+YP+IL IE++CS QQ VMAQ + +IF D L
Sbjct: 61 YHGHTLTSKISFRSVIEAINEYAFVASEYPLILCIENHCSEKQQLVMAQYLKEIFGDKLY 120
Query: 385 IHPVEKNETVLPSPHQLRGKILLKHKKL 412
P + E+ LPSPH L+GKI++K KKL
Sbjct: 121 TEPPNEGESYLPSPHDLKGKIIIKGKKL 148
>gnl|CDD|176564 cd08627, PI-PLCc_gamma1, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-gamma1. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-gamma isozyme 1. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-gamma represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C2 domain. The PLC
catalytic core domain is a TIM barrel with two highly
conserved regions (X and Y) split by a highly degenerate
linker sequence. Unique to PI-PLC-gamma1, a second PH
domain, two SH2 (Src homology 2) regions, and one SH3
(Src homology 3) region is present within this linker
region. PI-PLC-gamma1 is ubiquitously expressed. It is
activated by receptor and non-receptor tyrosine kinases
due to the presence of two SH2 and a single SH3 domain
within the linker region.
Length = 229
Score = 242 bits (618), Expect = 2e-74
Identities = 106/147 (72%), Positives = 124/147 (84%)
Query: 266 QDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVY 325
++M PLSHY+I+SSHNTYLTGDQFSSESS EAY RCLR GCRCIELDCWDGPDG P++Y
Sbjct: 2 EEMNNPLSHYWISSSHNTYLTGDQFSSESSLEAYARCLRMGCRCIELDCWDGPDGMPVIY 61
Query: 326 HGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLLI 385
HGHTLTTKIKF DV+ TI++HAF TS+YP+ILSIED+CS+ QQR MAQ +F DMLL
Sbjct: 62 HGHTLTTKIKFSDVLHTIKEHAFVTSEYPIILSIEDHCSIVQQRNMAQHFKKVFGDMLLT 121
Query: 386 HPVEKNETVLPSPHQLRGKILLKHKKL 412
PV+ N LPSP+QL+ KIL+KHKKL
Sbjct: 122 KPVDINADGLPSPNQLKRKILIKHKKL 148
>gnl|CDD|176565 cd08628, PI-PLCc_gamma2, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-gamma2. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-gamma isozyme 2. PI-PLC is a
signaling enzyme that hydrolyze the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-gamma represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C2 domain. The PLC
catalytic core domain is a TIM barrel with two highly
conserved regions (X and Y) split by a highly degenerate
linker sequence. Unique to PI-PLC-gamma2, a second PH
domain, two SH2 (Src homology 2) regions, and one SH3
(Src homology 3) region is present within this linker
region. PI-PLC-gamma2 is highly expressed in cells of
hematopoietic origin. It is activated by receptor and
non-receptor tyrosine kinases due to the presence of two
SH2 and a single SH3 domain within the linker region.
Unlike PI-PLC-gamma1, the activation of PI-PLC-gamma2
may require concurrent stimulation of PI 3-kinase.
Length = 254
Score = 241 bits (617), Expect = 5e-74
Identities = 116/202 (57%), Positives = 143/202 (70%), Gaps = 6/202 (2%)
Query: 266 QDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVY 325
QDM PLSHY+I+SSHNTYLTGDQ SESS EAY+RCLR GCRCIELDCWDGPDG PI+Y
Sbjct: 2 QDMNNPLSHYWISSSHNTYLTGDQLRSESSTEAYIRCLRMGCRCIELDCWDGPDGKPIIY 61
Query: 326 HGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLLI 385
HG T TTKIKF DVV+ I+DHAF TS+YPVILSIE++CS+ QQR MA++ ++F D LL+
Sbjct: 62 HGWTRTTKIKFDDVVQAIKDHAFVTSEYPVILSIEEHCSVEQQRHMAKVFKEVFGDKLLM 121
Query: 386 HPVEKNETVLPSPHQLRGKILLKHKKL--PEGSDEQTPCA-IAKDEGKLAEDKIKHCRIR 442
P+E + LPSP QL+ KI++KHKKL E SD C +K + L K R
Sbjct: 122 KPLEASADQLPSPTQLKEKIIIKHKKLIAIELSDLVVYCKPTSKTKDNLENPDFKEIRSF 181
Query: 443 VEGRLYTIGTTQFESLVELISY 464
VE + +I + V+L+ Y
Sbjct: 182 VETKAPSIIR---QKPVQLLKY 200
>gnl|CDD|197543 smart00148, PLCXc, Phospholipase C, catalytic domain (part); domain
X. Phosphoinositide-specific phospholipases C. These
enzymes contain 2 regions (X and Y) which together form
a TIM barrel-like structure containing the active site
residues. Phospholipase C enzymes (PI-PLC) act as signal
transducers that generate two second messengers,
inositol-1,4,5-trisphosphate and diacylglycerol. The
bacterial enzyme appears to be a homologue of the
mammalian PLCs.
Length = 143
Score = 235 bits (602), Expect = 3e-73
Identities = 89/143 (62%), Positives = 106/143 (74%)
Query: 268 MTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVYHG 327
M KPLSHYFI SSHNTYLTG Q ESS E Y++ L GCRC+ELDCWDGPDG P++YHG
Sbjct: 1 MDKPLSHYFIPSSHNTYLTGKQLWGESSVEGYIQALDAGCRCVELDCWDGPDGEPVIYHG 60
Query: 328 HTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLLIHP 387
HT T IK +V++ I+D AF TS YPVILS+E++CS QQ MAQ+ +IF DML P
Sbjct: 61 HTFTLPIKLSEVLEAIKDFAFVTSPYPVILSLENHCSPDQQAKMAQMFKEIFGDMLYTPP 120
Query: 388 VEKNETVLPSPHQLRGKILLKHK 410
+ + VLPSP QLRGKILLK +
Sbjct: 121 LTSSLEVLPSPEQLRGKILLKVR 143
>gnl|CDD|176536 cd08594, PI-PLCc_eta, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-eta. This
family corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-eta isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-eta represents a
class of neuron-speific PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal tail that terminates with a PDZ-binding
motif, a potential interaction site for other signaling
proteins. The PLC catalytic core domain is a TIM barrel
with two highly conserved regions (X and Y) split by a
highly degenerate linker sequence. There are two
PI-PLC-eta isozymes (1-2), both neuron-specific enzymes.
They function as calcium sensors that are activated by
small increases in intracellular calcium concentrations.
The PI-PLC-eta isozymes are also activated through GPCR
stimulation. Aside from the PI-PLC-eta isozymes
identified in mammals, their eukaryotic homologs are
also present in this family.
Length = 227
Score = 233 bits (597), Expect = 2e-71
Identities = 87/148 (58%), Positives = 114/148 (77%), Gaps = 1/148 (0%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIV 324
+QDMT+PLSHYFI SSHNTYLTGDQ S+S + Y R L+ GCRC+E+DCWDGPDG P+V
Sbjct: 1 NQDMTQPLSHYFIASSHNTYLTGDQLLSQSRVDMYARVLQAGCRCVEVDCWDGPDGEPVV 60
Query: 325 YHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDML- 383
+HG+TLT+KI F+DV++TI +AF ++YPVILSIE++CS+ QQ+ MAQ + +I D L
Sbjct: 61 HHGYTLTSKILFRDVIETINKYAFIKNEYPVILSIENHCSVQQQKKMAQYLKEILGDKLD 120
Query: 384 LIHPVEKNETVLPSPHQLRGKILLKHKK 411
L + + LPSP L+GKIL+K KK
Sbjct: 121 LSSVISGDSKQLPSPQSLKGKILIKGKK 148
>gnl|CDD|176533 cd08591, PI-PLCc_beta, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-beta. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-beta isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-beta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal coiled-coil (CT) domain necessary for
homodimerization. The PLC catalytic core domain is a TIM
barrel with two highly conserved regions (X and Y) split
by a highly degenerate linker sequence. There are four
PLC-beta isozymes (1-4). They are activated by the
heterotrimeric G protein alpha q subunits through their
C2 domain and long C-terminal extension. The beta-gamma
subunits of heterotrimeric G proteins are known to
activate the PLC-beta2 and -beta3 isozymes only. Aside
from four PLC-beta isozymes identified in mammals, some
eukaryotic PLC-beta homologs have been classified into
this subfamily, such as NorpA and PLC-21 from Drosophila
and PLC-beta from turkey, Xenopus, sponge, and hydra.
Length = 257
Score = 231 bits (591), Expect = 4e-70
Identities = 89/154 (57%), Positives = 111/154 (72%), Gaps = 6/154 (3%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDG--PDGTP 322
+QDM +PLSHYFINSSHNTYLTG QF +SS E Y + L GCRCIELDCWDG D P
Sbjct: 1 YQDMDQPLSHYFINSSHNTYLTGRQFGGKSSVEMYRQVLLSGCRCIELDCWDGKGEDEEP 60
Query: 323 IVYHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDM 382
I+ HG T+ T+I FKDV++ I + AF+TS+YPVILS E++CS QQ MA+ +IF D+
Sbjct: 61 IITHGKTMCTEILFKDVIEAIAETAFKTSEYPVILSFENHCSSKQQAKMAEYCREIFGDL 120
Query: 383 LLIHPVEKNETV----LPSPHQLRGKILLKHKKL 412
LL P+EK LPSP+ L+ KIL+K+KKL
Sbjct: 121 LLTEPLEKYPLEPGVPLPSPNDLKRKILIKNKKL 154
>gnl|CDD|176538 cd08596, PI-PLCc_epsilon, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-epsilon. This
family corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-epsilon isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-epsilon represents
a class of mammalian PI-PLC that has an N-terminal CDC25
homology domain with a guanyl-nucleotide exchange factor
(GFF) activity, a pleckstrin homology (PH) domain, an
array of EF hands, a PLC catalytic core domain, a C2
domain, and two predicted RA (Ras association) domains
that are implicated in the binding of small GTPases,
such as Ras or Rap, from the Ras family. The PLC
catalytic core domain is a TIM barrel with two highly
conserved regions (X and Y) split by a highly degenerate
linker sequence. There is one PI-PLC-epsilon isozyme
(1). PI-PLC-epsilon is activated by G alpha(12/13), G
beta gamma, and activated members of Ras and Rho small
GTPases. Aside from PI-PLC-epsilon identified in
mammals, its eukaryotic homologs have been classified
with this family.
Length = 254
Score = 220 bits (562), Expect = 5e-66
Identities = 94/156 (60%), Positives = 111/156 (71%), Gaps = 4/156 (2%)
Query: 266 QDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVY 325
+D+ PLS+Y+I SSHNTYLTG Q ESS E Y + L GCRC+ELDCWDG DG PI+Y
Sbjct: 2 EDLQYPLSYYYIESSHNTYLTGHQLKGESSVELYSQVLLTGCRCVELDCWDGDDGMPIIY 61
Query: 326 HGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDML-- 383
HGHTLTTKI FKDVV+ I AF TS YPVILSIE++CSL QQR MA+I +F + L
Sbjct: 62 HGHTLTTKIPFKDVVEAINRSAFITSDYPVILSIENHCSLQQQRKMAEIFKTVFGEKLVT 121
Query: 384 --LIHPVEKNETVLPSPHQLRGKILLKHKKLPEGSD 417
L ++ LPSP QL+ KILLK+KK PE SD
Sbjct: 122 KFLFESDFSDDPSLPSPLQLKNKILLKNKKAPELSD 157
Score = 30.2 bits (68), Expect = 3.9
Identities = 12/18 (66%), Positives = 15/18 (83%)
Query: 2 KLRGKILLKHKKLPEGSD 19
+L+ KILLK+KK PE SD
Sbjct: 140 QLKNKILLKNKKAPELSD 157
>gnl|CDD|176566 cd08629, PI-PLCc_delta1, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-delta1. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-delta1 isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-delta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C-terminal C2 domain.
This subfamily corresponds to the catalytic domain which
is a TIM barrel with two highly conserved regions (X and
Y) split by a highly degenerate linker sequence. There
are three PI-PLC-delta isozymes (1,3 and 4).
PI-PLC-delta1 is relatively well characterized. It is
activated by high calcium levels generated by other
PI-PLC family members, and therefore functions as a
calcium amplifier within the cell. Unlike PI-PLC-delta
4, PI-PLC-delta1 and 3 possess a putative nuclear export
sequence (NES) located in the EF-hand domain, which may
be responsible transporting PI-PLC-delta1and 3 from the
cell nucleus. Experiments show PI-PLC-delta1 is
essential for normal hair formation.
Length = 258
Score = 218 bits (557), Expect = 3e-65
Identities = 90/148 (60%), Positives = 115/148 (77%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIV 324
+QDM +PLSHY ++SSHNTYL DQ + SS EAY+R L +GCRC+ELDCWDGP+ PI+
Sbjct: 1 YQDMDQPLSHYLVSSSHNTYLLEDQLTGPSSTEAYIRALCKGCRCLELDCWDGPNQEPII 60
Query: 325 YHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLL 384
YHG+T T+KI F DV++ IRD+AF+ S YPVILS+E++CSL QQRVMA+ + I +LL
Sbjct: 61 YHGYTFTSKILFCDVLRAIRDYAFKASPYPVILSLENHCSLEQQRVMARHLRAILGPILL 120
Query: 385 IHPVEKNETVLPSPHQLRGKILLKHKKL 412
P++ T LPSP QL+GKILLK KKL
Sbjct: 121 DQPLDGVTTSLPSPEQLKGKILLKGKKL 148
>gnl|CDD|176567 cd08630, PI-PLCc_delta3, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-delta3. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-delta3 isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-delta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C-terminal C2 domain.
This family corresponds to the catalytic domain which is
a TIM barrel with two highly conserved regions (X and Y)
split by a highly degenerate linker sequence. There are
three PI-PLC-delta isozymes (1,3 and 4). Unlike
PI-PLC-delta 4, PI-PLC-delta1 and 3 possess a putative
nuclear export sequence (NES) located in the EF-hand
domain, which may be responsible transporting
PI-PLC-delta1 and 3 from the cell nucleus.
Length = 258
Score = 218 bits (557), Expect = 3e-65
Identities = 90/162 (55%), Positives = 116/162 (71%), Gaps = 4/162 (2%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIV 324
QDM++PL+HYFI+SSHNTYLT Q SS EAYVR QGCRC+ELDCW+GP G P++
Sbjct: 1 FQDMSQPLAHYFISSSHNTYLTDSQIGGPSSTEAYVRAFAQGCRCVELDCWEGPGGEPVI 60
Query: 325 YHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLL 384
YHGHTLT+KI F+DV++ +R HAF S YPVILS+E++C L QQ MA+ + I DML+
Sbjct: 61 YHGHTLTSKILFRDVIQAVRQHAFTASPYPVILSLENHCGLEQQAAMARHLQTILGDMLV 120
Query: 385 IHPVEK-NETVLPSPHQLRGKILLKHKKL---PEGSDEQTPC 422
P++ N LPSP +L+G++L+K KKL PE S C
Sbjct: 121 TQPLDSLNPEELPSPEELKGRVLVKGKKLQISPELSALAVYC 162
>gnl|CDD|176563 cd08626, PI-PLCc_beta4, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-beta4. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-beta isozyme 4. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-beta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal coiled-coil (CT) domain necessary for
homodimerization. The PLC catalytic core domain is a TIM
barrel with two highly conserved regions (X and Y) split
by a highly degenerate linker sequence. PI-PLC-beta4 is
expressed in high concentrations in cerebellar Purkinje
and granule cells, the median geniculate body, and the
lateral geniculate nucleus. It is activated by the
heterotrimeric G protein alpha q subunits through their
C2 domain and long C-terminal extension.
Length = 257
Score = 211 bits (539), Expect = 1e-62
Identities = 86/154 (55%), Positives = 110/154 (71%), Gaps = 6/154 (3%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGP--DGTP 322
+QDM +PL+HYFINSSHNTYLTG QF +SS E Y + L GCRCIELDCWDG D P
Sbjct: 1 YQDMDQPLAHYFINSSHNTYLTGRQFGGKSSVEMYRQVLLAGCRCIELDCWDGKGEDQEP 60
Query: 323 IVYHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDM 382
I+ HG + T I FKDV++ I+D AF TS YPVILS E++CS PQQ +A+ +IF D+
Sbjct: 61 IITHGKAMCTDILFKDVIQAIKDTAFVTSDYPVILSFENHCSKPQQYKLAKYCEEIFGDL 120
Query: 383 LLIHPVEKNET----VLPSPHQLRGKILLKHKKL 412
LL P+E + LPSP++L+ KIL+K+K+L
Sbjct: 121 LLTKPLESHPLEPGVPLPSPNKLKRKILIKNKRL 154
>gnl|CDD|176568 cd08631, PI-PLCc_delta4, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-delta4. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-delta4 isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-delta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C-terminal C2 domain.
This CD corresponds to the catalytic domain which is a
TIM barrel with two highly conserved regions (X and Y)
split by a highly degenerate linker sequence. There are
three PI-PLC-delta isozymes (1,3 and 4). Unlike
PI-PLC-delta 1 and 3, a putative nuclear export sequence
(NES) located in the EF-hand domain, which may be
responsible transporting PI-PLC-delta1 and 3 from the
cell nucleus, is not present in PI-PLC-delta4.
Experiments show PI-PLC-delta4 is required for the
acrosome reaction in fertilization.
Length = 258
Score = 207 bits (528), Expect = 4e-61
Identities = 90/157 (57%), Positives = 115/157 (73%), Gaps = 4/157 (2%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIV 324
+QDMT+PL HYFI SSHNTYL DQ +SS E Y+R L++GCRC+E+D WDGP+G PIV
Sbjct: 1 YQDMTQPLCHYFICSSHNTYLMEDQLRGQSSVEGYIRALKRGCRCVEVDVWDGPNGEPIV 60
Query: 325 YHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLL 384
YHGHT T+KI FKDVV + +AF+ S YPVILS+E++C + QQ+ MAQ + +I + LL
Sbjct: 61 YHGHTFTSKILFKDVVAAVAQYAFQVSDYPVILSLENHCGVEQQQTMAQHLTEILGEKLL 120
Query: 385 IHPVE-KNETVLPSPHQLRGKILLKHKKL---PEGSD 417
++ T LPSP +LRGKILLK KK+ PE SD
Sbjct: 121 STTLDGVLPTQLPSPEELRGKILLKGKKIRLSPELSD 157
>gnl|CDD|176570 cd08633, PI-PLCc_eta2, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-eta2. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-eta isozyme 2. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-eta represents a
class of neuron-speific PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal tail that terminates with a PDZ-binding
motif, a potential interaction site for other signaling
proteins. The PLC catalytic core domain is a TIM barrel
with two highly conserved regions (X and Y) split by a
highly degenerate linker sequence. PI-PLC-eta2 is a
neuron-specific enzyme and expressed in the brain. It
may in part function downstream of G-protein-coupled
receptors and play an important role in the formation
and maintenance of the neuronal network in the postnatal
brain.
Length = 254
Score = 204 bits (520), Expect = 4e-60
Identities = 91/149 (61%), Positives = 117/149 (78%), Gaps = 1/149 (0%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIV 324
+QDMT+PLSHYFI SSHNTYL+GDQ S+S + Y L+ GCRC+E+DCWDGPDG PIV
Sbjct: 1 NQDMTQPLSHYFITSSHNTYLSGDQLMSQSRVDMYAWVLQAGCRCVEVDCWDGPDGEPIV 60
Query: 325 YHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLL 384
+HG+TLT+KI FKDV++TI +AF ++YPVILSIE++CS+PQQ+ MAQ + +I D L
Sbjct: 61 HHGYTLTSKILFKDVIETINKYAFIKNEYPVILSIENHCSVPQQKKMAQYLTEILGDKLD 120
Query: 385 IHPVEKNE-TVLPSPHQLRGKILLKHKKL 412
+ V N+ T LPSP L+GKIL+K KKL
Sbjct: 121 LSSVISNDCTRLPSPEILKGKILVKGKKL 149
>gnl|CDD|198186 cd09932, SH2_C-SH2_PLC_gamma_like, C-terminal Src homology 2
(C-SH2) domain in Phospholipase C gamma. Phospholipase
C gamma is a signaling molecule that is recruited to the
C-terminal tail of the receptor upon autophosphorylation
of a highly conserved tyrosine. PLCgamma is composed of
a Pleckstrin homology (PH) domain followed by an
elongation factor (EF) domain, 2 catalytic regions of
PLC domains that flank 2 tandem SH2 domains (N-SH2,
C-SH2), and ending with a SH3 domain and C2 domain.
N-SH2 SH2 domain-mediated interactions represent a
crucial step in transmembrane signaling by receptor
tyrosine kinases. SH2 domains recognize phosphotyrosine
(pY) in the context of particular sequence motifs in
receptor phosphorylation sites. Both N-SH2 and C-SH2
have a very similar binding affinity to pY. But in
growth factor stimulated cells these domains bind to
different target proteins. N-SH2 binds to pY containing
sites in the C-terminal tails of tyrosine kinases and
other receptors. Recently it has been shown that this
interaction is mediated by phosphorylation-independent
interactions between a secondary binding site found
exclusively on the N-SH2 domain and a region of the
FGFR1 tyrosine kinase domain. This secondary site on the
SH2 cooperates with the canonical pY site to regulate
selectivity in mediating a specific cellular process.
C-SH2 binds to an intramolecular site on PLCgamma itself
which allows it to hydrolyze
phosphatidylinositol-4,5-bisphosphate into
diacylglycerol and inositol triphosphate. These then
activate protein kinase C and release calcium. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 104
Score = 196 bits (501), Expect = 2e-59
Identities = 72/104 (69%), Positives = 89/104 (85%)
Query: 657 HEDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEG 716
HE KEW+H TR QAE++L RVP DGAFLVRPSE D +S+ ISFRAE KIKHCRI+ EG
Sbjct: 1 HESKEWFHANLTREQAEEMLMRVPRDGAFLVRPSETDPNSFAISFRAEGKIKHCRIKQEG 60
Query: 717 RLYTIGTTQFESLVELISYYERHPLYKKIELWYPVSEDLIQRMG 760
RL+ IGT+QFESLVEL+SYYE+HPLY+KI+L YPV+E+L+++ G
Sbjct: 61 RLFVIGTSQFESLVELVSYYEKHPLYRKIKLRYPVNEELLEKYG 104
Score = 111 bits (279), Expect = 5e-29
Identities = 41/58 (70%), Positives = 53/58 (91%)
Query: 432 AEDKIKHCRIRVEGRLYTIGTTQFESLVELISYYERHPLYKKIELWYPVSEDLIQRMG 489
AE KIKHCRI+ EGRL+ IGT+QFESLVEL+SYYE+HPLY+KI+L YPV+E+L+++ G
Sbjct: 47 AEGKIKHCRIKQEGRLFVIGTSQFESLVELVSYYEKHPLYRKIKLRYPVNEELLEKYG 104
Score = 85.0 bits (211), Expect = 7e-20
Identities = 39/107 (36%), Positives = 64/107 (59%), Gaps = 10/107 (9%)
Query: 498 HFGEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRI 557
H ++WFH L+ R +AE++L R DG FLVR SET +++SF +G++ HCRI
Sbjct: 1 HESKEWFHANLT--REQAEEMLMRVPR--DGAFLVRPSETDPNSFAISFRAEGKIKHCRI 56
Query: 558 RSKPESGQFYLVEKSYFDSLYSLISHYRTNHLRSQEFLITLQEPVPQ 604
+ + G+ +++ S F+SL L+S+Y + L + I L+ PV +
Sbjct: 57 K---QEGRLFVIGTSQFESLVELVSYYEKHPLYRK---IKLRYPVNE 97
>gnl|CDD|176541 cd08599, PI-PLCc_plant, Catalytic domain of plant
phosphatidylinositide-specific phospholipases C. This
family corresponds to the catalytic domain present in a
group of phosphoinositide-specific phospholipases C
(PI-PLC, EC 3.1.4.11) encoded by PLC genes from higher
plants, which are homologs of mammalian PI-PLC in terms
of overall sequence similarity and domain organization.
Mammalian PI-PLC is a signaling enzyme that hydrolyzes
the membrane phospholipids
phosphatidylinositol-4,5-bisphosphate (PIP2) to
generate two important second messengers in eukaryotic
signal transduction cascades, inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. The domain arrangement of
plant PI-PLCs is structurally similar to the mammalian
PLC-zeta isoform, which lacks the N-terminal pleckstrin
homology (PH) domain, but contains EF-hand like motifs
(which are absent in a few plant PLCs), a PLC catalytic
core domain with X- and Y- highly conserved regions
split by a linker sequence, and a C2 domain. However, at
the sequence level, the plant PI-PLCs are closely
related to the mammalian PLC-delta isoform. Experiments
show that plant PLCs display calcium dependent PLC
catalytic properties, although they lack some of the
N-terminal motifs found in their mammalian counterparts.
A putative calcium binding site may be located at the
region spanning the X- and Y- domains.
Length = 228
Score = 199 bits (507), Expect = 2e-58
Identities = 71/146 (48%), Positives = 92/146 (63%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIV 324
H DMT PLSHYFI SSHN+YLTG+Q SS SS + L +GCR IELD W G G V
Sbjct: 1 HHDMTAPLSHYFIFSSHNSYLTGNQLSSRSSTAPIIEALLRGCRVIELDLWPGGRGDICV 60
Query: 325 YHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLL 384
HG TLT +KF+D +K I+++AF S+YPVI+++E++ S Q AQI+ + D L
Sbjct: 61 LHGGTLTKPVKFEDCIKAIKENAFTASEYPVIITLENHLSPELQAKAAQILRETLGDKLF 120
Query: 385 IHPVEKNETVLPSPHQLRGKILLKHK 410
E PSP +L+GKIL+ K
Sbjct: 121 YPDSEDLPEEFPSPEELKGKILISDK 146
>gnl|CDD|176537 cd08595, PI-PLCc_zeta, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-zeta. This
family corresponds to the catalytic domain presenting in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-zeta isozyme. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-zeta represents a
class of sperm-specific PI-PLC that has an N-terminal
EF-hand domain, a PLC catalytic core domain, and a
C-terminal C2 domain. The PLC catalytic core domain is a
TIM barrel with two highly conserved regions (X and Y)
split by a highly degenerate linker sequence. There is
one PLC-zeta isozyme (1). PLC-zeta plays a fundamental
role in vertebrate fertilization by initiating
intracellular calcium oscillations that trigger the
embryo development. However, the mechanism of its
activation still remains unclear. Aside from PI-PLC-zeta
identified in mammals, its eukaryotic homologs have been
classified with this family.
Length = 257
Score = 196 bits (500), Expect = 3e-57
Identities = 80/148 (54%), Positives = 106/148 (71%), Gaps = 1/148 (0%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIV 324
+QDM PLS YFI+SSHNTYL DQ S + YV LR+GCRC+E+DCWDG D P+V
Sbjct: 1 YQDMDHPLSDYFISSSHNTYLVSDQLVGPSDLDGYVSALRKGCRCLEIDCWDGADNEPVV 60
Query: 325 YHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLL 384
YHG+TLT+KI FK+V+ T+ +AFE S YPV+LS+E++CS QQ +MA ++ I + LL
Sbjct: 61 YHGYTLTSKILFKEVITTVEKYAFEKSDYPVVLSLENHCSTEQQEIMAHYLVSILGEKLL 120
Query: 385 IHPVEKNET-VLPSPHQLRGKILLKHKK 411
P++ T LPSP L+ KIL+K+KK
Sbjct: 121 RAPIDDPATGELPSPEALKFKILVKNKK 148
>gnl|CDD|176569 cd08632, PI-PLCc_eta1, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-eta1. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-eta isozyme 1. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-eta represents a
class of neuron-speific PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal tail that terminates with a PDZ-binding
motif, a potential interaction site for other signaling
proteins. The PLC catalytic core domain is a TIM barrel
with two highly conserved regions (X and Y) split by a
highly degenerate linker sequence. PI-PLC-eta1 is a
neuron-specific enzyme and expressed in only nerve
tissues such as the brain and spinal cord. It may
perform a fundamental role in the brain.
Length = 253
Score = 196 bits (498), Expect = 4e-57
Identities = 84/149 (56%), Positives = 114/149 (76%), Gaps = 1/149 (0%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIV 324
+QDM +PL +YFI SSHNTYLTGDQ S+S + Y R L+ GCRC+E+DCWDGPDG P+V
Sbjct: 1 NQDMDQPLCNYFIASSHNTYLTGDQLLSQSKVDMYARVLQAGCRCVEVDCWDGPDGEPVV 60
Query: 325 YHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLL 384
+HG+TLT+KI F+DV++TI +AF +++PVILSIE++CS+ QQ+ +AQ + +IF D L
Sbjct: 61 HHGYTLTSKITFRDVIETINKYAFVKNEFPVILSIENHCSIQQQKKIAQYLKEIFGDKLD 120
Query: 385 IHPVEKNET-VLPSPHQLRGKILLKHKKL 412
+ V + LPSP L+GKIL+K KKL
Sbjct: 121 LSSVLTGDPKQLPSPQLLKGKILVKGKKL 149
>gnl|CDD|176561 cd08624, PI-PLCc_beta2, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-beta2. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-beta isozyme 2. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-beta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal coiled-coil (CT) domain necessary for
homodimerization. The PLC catalytic core domain is a TIM
barrel with two highly conserved regions (X and Y) split
by a highly degenerate linker sequence. PI-PLC-beta2 is
expressed at highest levels in cells of hematopoietic
origin. It is activated by the heterotrimeric G protein
alpha q subunits through their C2 domain and long
C-terminal extension. It is also activated by the
beta-gamma subunits of heterotrimeric G proteins.
Length = 261
Score = 182 bits (464), Expect = 3e-52
Identities = 92/159 (57%), Positives = 109/159 (68%), Gaps = 7/159 (4%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDG--PDGTP 322
HQDMT+PL+HYFINSSHNTYLT QFS SS E Y + L GCRC+ELDCW G PD P
Sbjct: 1 HQDMTQPLNHYFINSSHNTYLTAGQFSGLSSPEMYRQVLLSGCRCVELDCWKGKPPDEEP 60
Query: 323 IVYHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLP-QQRVMAQIMLDIFKD 381
I+ HG T+TT+I FKD ++ I + AF+TS YPVILS E++ P QQ MA+ IF D
Sbjct: 61 IITHGFTMTTEILFKDAIEAIAESAFKTSPYPVILSFENHVDSPKQQAKMAEYCRTIFGD 120
Query: 382 MLLIHPVEKNE----TVLPSPHQLRGKILLKHKKLPEGS 416
MLL P+EK LPSP LRGKIL+K+KK E S
Sbjct: 121 MLLTEPLEKYPLKPGVPLPSPEDLRGKILIKNKKYEEMS 159
>gnl|CDD|199829 cd10341, SH2_N-SH2_PLC_gamma_like, N-terminal Src homology 2
(N-SH2) domain in Phospholipase C gamma. Phospholipase
C gamma is a signaling molecule that is recruited to the
C-terminal tail of the receptor upon autophosphorylation
of a highly conserved tyrosine. PLCgamma is composed of
a Pleckstrin homology (PH) domain followed by an
elongation factor (EF) domain, 2 catalytic regions of
PLC domains that flank 2 tandem SH2 domains (N-SH2,
C-SH2), and ending with a SH3 domain and C2 domain.
N-SH2 SH2 domain-mediated interactions represent a
crucial step in transmembrane signaling by receptor
tyrosine kinases. SH2 domains recognize phosphotyrosine
(pY) in the context of particular sequence motifs in
receptor phosphorylation sites. Both N-SH2 and C-SH2
have a very similar binding affinity to pY. But in
growth factor stimulated cells these domains bind to
different target proteins. N-SH2 binds to pY containing
sites in the C-terminal tails of tyrosine kinases and
other receptors. Recently it has been shown that this
interaction is mediated by phosphorylation-independent
interactions between a secondary binding site found
exclusively on the N-SH2 domain and a region of the
FGFR1 tyrosine kinase domain. This secondary site on the
SH2 cooperates with the canonical pY site to regulate
selectivity in mediating a specific cellular process.
C-SH2 binds to an intramolecular site on PLCgamma itself
which allows it to hydrolyze
phosphatidylinositol-4,5-bisphosphate into
diacylglycerol and inositol triphosphate. These then
activate protein kinase C and release calcium. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 99
Score = 166 bits (423), Expect = 1e-48
Identities = 62/99 (62%), Positives = 72/99 (72%), Gaps = 2/99 (2%)
Query: 498 HFGEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRI 557
HF E WFHG+L GR EAE LL Y GDGTFLVRESETF+GDY+LSFW G+V HCRI
Sbjct: 1 HFTEPWFHGKLGDGRDEAEKLLLEYCEGGDGTFLVRESETFVGDYTLSFWRNGKVQHCRI 60
Query: 558 RSKPESG--QFYLVEKSYFDSLYSLISHYRTNHLRSQEF 594
RS+ E+G ++YL + FDSLY LI +YR N LR EF
Sbjct: 61 RSRQENGEKKYYLTDNLVFDSLYELIDYYRQNPLRCAEF 99
Score = 65.5 bits (160), Expect = 5e-13
Identities = 37/94 (39%), Positives = 47/94 (50%), Gaps = 9/94 (9%)
Query: 657 HEDKEWYHP--TATRSQAEDLLR--RVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI 712
H + W+H R +AE LL DG FLVR SE Y +SF K++HCRI
Sbjct: 1 HFTEPWFHGKLGDGRDEAEKLLLEYCEGGDGTFLVRESETFVGDYTLSFWRNGKVQHCRI 60
Query: 713 RV-----EGRLYTIGTTQFESLVELISYYERHPL 741
R E + Y F+SL ELI YY ++PL
Sbjct: 61 RSRQENGEKKYYLTDNLVFDSLYELIDYYRQNPL 94
Score = 37.3 bits (87), Expect = 0.004
Identities = 18/41 (43%), Positives = 24/41 (58%), Gaps = 5/41 (12%)
Query: 435 KIKHCRIRV-----EGRLYTIGTTQFESLVELISYYERHPL 470
K++HCRIR E + Y F+SL ELI YY ++PL
Sbjct: 54 KVQHCRIRSRQENGEKKYYLTDNLVFDSLYELIDYYRQNPL 94
>gnl|CDD|176562 cd08625, PI-PLCc_beta3, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-beta3. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-beta isozyme 3. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-beta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal coiled-coil (CT) domain necessary for
homodimerization. The PLC catalytic core domain is a TIM
barrel with two highly conserved regions (X and Y) split
by a highly degenerate linker sequence. PI-PLC-beta3 is
widely expressed at highest levels in brain, liver, and
parotid gland. It is activated by the heterotrimeric G
protein alpha q subunits through their C2 domain and
long C-terminal extension. It is also activated by the
beta-gamma subunits of heterotrimeric G proteins.
Length = 258
Score = 167 bits (424), Expect = 8e-47
Identities = 85/153 (55%), Positives = 105/153 (68%), Gaps = 7/153 (4%)
Query: 267 DMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDG--PDGTPIV 324
DM +PLSHYFINSSHNTYLT Q + SS E Y + L GCRCIELDCW G P+ P +
Sbjct: 3 DMNQPLSHYFINSSHNTYLTAGQLTGLSSVEMYRQVLLTGCRCIELDCWKGRPPEEEPFI 62
Query: 325 YHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNC-SLPQQRVMAQIMLDIFKDML 383
HG T+TT+I FKDV++ I + AF+TS YPVILS E++ S QQ MA+ IF D L
Sbjct: 63 THGFTMTTEIPFKDVIEAIAESAFKTSPYPVILSFENHVDSAKQQAKMAEYCRSIFGDAL 122
Query: 384 LIHPVEKNETV----LPSPHQLRGKILLKHKKL 412
LI P++K V LPSP +L GKIL+K+KK+
Sbjct: 123 LIDPLDKYPLVPGVQLPSPQELMGKILVKNKKM 155
>gnl|CDD|176497 cd00137, PI-PLCc, Catalytic domain of prokaryotic and eukaryotic
phosphoinositide-specific phospholipase C. This
subfamily corresponds to the catalytic domain present in
prokaryotic and eukaryotic phosphoinositide-specific
phospholipase C (PI-PLC), which is a ubiquitous enzyme
catalyzing the cleavage of the sn3-phosphodiester bond
in the membrane phosphoinositides (phosphatidylinositol,
PI; Phosphatidylinositol-4-phosphate, PIP;
phosphatidylinositol 4,5-bisphosphate, PIP2) to yield
inositol phosphates (inositol monosphosphate, InsP;
inositol diphosphate, InsP2; inositol trisphosphate,
InsP3) and diacylglycerol (DAG). The higher eukaryotic
PI-PLCs (EC 3.1.4.11) have a multidomain organization
that consists of a PLC catalytic core domain, and
various regulatory domains. They play a critical role in
most signal transduction pathways, controlling numerous
cellular events, such as cell growth, proliferation,
excitation and secretion. These PI-PLCs strictly require
Ca2+ for their catalytic activity. They display a clear
preference towards the hydrolysis of the more highly
phosphorylated PI-analogues, PIP2 and PIP, to generate
two important second messengers, InsP3 and DAG. InsP3
triggers inflow of calcium from intracellular stores,
while DAG, together with calcium, activates protein
kinase C, which then phosphorylates other molecules,
leading to altered cellular activity. In contrast,
bacterial PI-PLCs contain a single catalytic domain.
Although their precise physiological function remains
unclear, bacterial PI-PLCs may function as virulence
factors in some pathogenic bacteria. They participate in
Ca2+-independent PI metabolism. They are characterized
as phosphatidylinositol-specific phospholipase C (EC
4.6.1.13) that selectively hydrolyze PI, not PIP or
PIP2. The TIM-barrel type catalytic domain in bacterial
PI-PLCs is very similar to the one in eukaryotic
PI-PLCs, in which the catalytic domain is assembled from
two highly conserved X- and Y-regions split by a
divergent linker sequence. The catalytic mechanism of
both prokaryotic and eukaryotic PI-PLCs is based on
general base and acid catalysis utilizing two well
conserved histidines, and consists of two steps, a
phosphotransfer and a phosphodiesterase reaction. This
superfamily also includes a distinctly different type of
eukaryotic PLC, glycosylphosphatidylinositol-specific
phospholipase C (GPI-PLC), an integral membrane protein
characterized in the protozoan parasite Trypanosoma
brucei. T. brucei GPI-PLC hydrolyzes the GPI-anchor on
the variant specific glycoprotein (VSG), releasing
dimyristyl glycerol (DMG), which may facilitate the
evasion of the protozoan to the host#s immune system. It
does not require Ca2+ for its activity and is more
closely related to bacterial PI-PLCs, but not mammalian
PI-PLCs.
Length = 274
Score = 159 bits (403), Expect = 9e-44
Identities = 59/155 (38%), Positives = 84/155 (54%), Gaps = 9/155 (5%)
Query: 265 HQDMTKPLSHYFINSSHNTYLTGDQFSSE-----SSCEAYVRCLRQGCRCIELDCWDGPD 319
H T+PL+HY I +H+TYLT QF+ + + E Y + L GCRC+++ CWDG
Sbjct: 1 HHPDTQPLAHYSIPGTHDTYLTAGQFTIKQVWGLTQTEMYRQQLLSGCRCVDIRCWDGKP 60
Query: 320 GTPIVYHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLP--QQRVMAQIMLD 377
PI+YHG T I K+V++ I + +I+S+++ Q MA+
Sbjct: 61 EEPIIYHGPTF-LDIFLKEVIEAIAQFLKKNPPETIIMSLKNEVDSMDSFQAKMAEYCRT 119
Query: 378 IFKDMLLIHPVEKNETVLPSPHQLRGKILLKHKKL 412
IF DMLL P++ LPS LRGKILL +KK
Sbjct: 120 IFGDMLLTPPLKPTVP-LPSLEDLRGKILLLNKKN 153
>gnl|CDD|176560 cd08623, PI-PLCc_beta1, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-beta1. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-beta isozyme 1. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-beta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal coiled-coil (CT) domain necessary for
homodimerization. The PLC catalytic core domain is a TIM
barrel with two highly conserved regions (X and Y) split
by a highly degenerate linker sequence. PI-PLC-beta1 is
expressed at highest levels in specific regions of the
brain. It is activated by the heterotrimeric G protein
alpha q subunits through their C2 domain and long
C-terminal extension.
Length = 258
Score = 157 bits (397), Expect = 4e-43
Identities = 76/154 (49%), Positives = 106/154 (68%), Gaps = 7/154 (4%)
Query: 266 QDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDG--PDGTPI 323
+DM++PLSHYFINSSHNTYLT Q + SS E Y + L GCRC+ELDCW G + P+
Sbjct: 2 EDMSQPLSHYFINSSHNTYLTAGQLAGNSSVEMYRQVLLSGCRCVELDCWKGRTAEEEPV 61
Query: 324 VYHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSLPQQRV-MAQIMLDIFKDM 382
+ HG T+TT+I FK+V++ I + AF+TS +P++LS E++ P+Q+ MA+ IF D
Sbjct: 62 ITHGFTMTTEISFKEVIEAIAECAFKTSPFPILLSFENHVDSPKQQAKMAEYCRLIFGDA 121
Query: 383 LLIHPVEK----NETVLPSPHQLRGKILLKHKKL 412
LL+ P+EK + LPSP L KIL+K+KK+
Sbjct: 122 LLMEPLEKYPLESGVPLPSPMDLMYKILVKNKKM 155
>gnl|CDD|241516 cd13362, PH_PLC_gamma, Phospholipase C-gamma (PLC-gamma) pleckstrin
homology (PH) domain. PLC-gamma (PLCgamma) is activated
by receptor and non-receptor tyrosine kinases due to the
presence of its SH2 and SH3 domains. There are two main
isoforms of PLC-gamma expressed in human specimens,
PLC-gamma1 and PLC-gamma2. PLC-gamma consists of an
N-terminal PH domain, a EF hand domain, a catalytic
domain split into X and Y halves internal to which is a
PH domain split by two SH2 domains and a single SH3
domain, and a C-terminal C2 domain. Only the first PH
domain is present in this hierarchy. PLCs (EC 3.1.4.3)
play a role in the initiation of cellular activation,
proliferation, differentiation and apoptosis. They are
central to inositol lipid signalling pathways,
facilitating intracellular Ca2+ release and protein
kinase C (PKC) activation. Specificaly, PLCs catalyze
the cleavage of phosphatidylinositol-4,5-bisphosphate
(PIP2) and result in the release of 1,2-diacylglycerol
(DAG) and inositol 1,4,5-triphosphate (IP3). These
products trigger the activation of protein kinase C
(PKC) and the release of Ca2+ from intracellular stores.
There are fourteen kinds of mammalian phospholipase C
proteins which are are classified into six isotypes
(beta, gamma, delta, epsilon, zeta, eta). PH domains
have diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They share
little sequence conservation, but all have a common
fold, which is electrostatically polarized. Less than
10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 121
Score = 136 bits (345), Expect = 9e-38
Identities = 47/83 (56%), Positives = 63/83 (75%)
Query: 26 IAKDEVDMREVKEVRVGKCFKDFDRWPEESGRVDAARCFIVLYGSEFKLKTLSIAAFSEK 85
+ +D+RE+KE+R GK KDF+RWP+E+ R D + CF++LYGSEF+LKTLS+AA SE+
Sbjct: 39 RIEGAIDIREIKEIRPGKNSKDFERWPDEAKRQDPSCCFVILYGSEFRLKTLSLAADSEE 98
Query: 86 ECGLWVTGLRYLVPDTLRAPYPL 108
E W+ GL+YLV DTL A PL
Sbjct: 99 EAEKWLKGLKYLVQDTLSASTPL 121
>gnl|CDD|178538 PLN02952, PLN02952, phosphoinositide phospholipase C.
Length = 599
Score = 144 bits (365), Expect = 4e-36
Identities = 84/247 (34%), Positives = 126/247 (51%), Gaps = 6/247 (2%)
Query: 185 DSYSHYSSDGQTVTASELTNFLIREQNETNVNEREVSRHMRDYLQDEQRNVQEPYFTFM- 243
D + +S G + A +L FL+ Q+E + E R + + + +
Sbjct: 42 DVFCKFSVGGGHMGADQLRRFLVLHQDELDCTLAEAQRIVEEVINRRHHVTRYTRHGLNL 101
Query: 244 -EFIDFLFSKQNELWDQQYDAIHQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRC 302
+F FL ++L +H DMT PLSHYFI + HN+YLTG+Q SS+ S V+
Sbjct: 102 DDFFHFLL--YDDLNGPITPQVHHDMTAPLSHYFIYTGHNSYLTGNQLSSDCSEVPIVKA 159
Query: 303 LRQGCRCIELDCWDGPDGTPI-VYHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIED 361
L++G R IELD W G I V HG TLTT + +K+IRD+AF +S YPVI+++ED
Sbjct: 160 LQRGVRVIELDLWPGSTKDEILVLHGRTLTTPVPLIKCLKSIRDYAFSSSPYPVIITLED 219
Query: 362 NCSLPQQRVMAQIMLDIFKDMLLIHPVEKNETVLPSPHQLRGKILLKHKKLPEGSDEQTP 421
+ + Q +A++ IF ML +P + PSP L+ +I++ K E + P
Sbjct: 220 HLTPDLQAKVAEMATQIFGQMLY-YPESDSLVQFPSPESLKHRIIISTKPPKEYLESSGP 278
Query: 422 CAIAKDE 428
I K
Sbjct: 279 IVIKKKN 285
>gnl|CDD|177868 PLN02222, PLN02222, phosphoinositide phospholipase C 2.
Length = 581
Score = 131 bits (330), Expect = 9e-32
Identities = 76/225 (33%), Positives = 115/225 (51%), Gaps = 8/225 (3%)
Query: 187 YSHYSSDGQTVTASELTNFLIREQNETNVNEREVSRHMRDYLQDEQRNVQEPYFTFMEFI 246
+ YS +G +T L FLI Q + + + RN F
Sbjct: 31 FEKYSENG-VMTVDHLHRFLIDVQKQDKATREDAQSIINSASSLLHRN----GLHLDAFF 85
Query: 247 DFLFSKQNELWDQQYDAIHQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRCLRQG 306
+LF N +H DM P+SHYFI + HN+YLTG+Q SS+ S + L++G
Sbjct: 86 KYLFGDNNPPLALH--EVHHDMDAPISHYFIFTGHNSYLTGNQLSSDCSEVPIIDALKKG 143
Query: 307 CRCIELDCWDGPDGTPI-VYHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIEDNCSL 365
R IELD W D I V HG TLTT + +K IR HAF+ S YPV++++ED+ +
Sbjct: 144 VRVIELDIWPNSDKDDIDVLHGMTLTTPVGLIKCLKAIRAHAFDVSDYPVVVTLEDHLTP 203
Query: 366 PQQRVMAQIMLDIFKDMLLIHPVEKNETVLPSPHQLRGKILLKHK 410
Q +A+++ +IF ++L PV ++ PSP+ L+ +I++ K
Sbjct: 204 DLQSKVAEMVTEIFGEILFTPPVGESLKEFPSPNSLKKRIIISTK 248
>gnl|CDD|177873 PLN02228, PLN02228, Phosphoinositide phospholipase C.
Length = 567
Score = 130 bits (329), Expect = 9e-32
Identities = 82/242 (33%), Positives = 124/242 (51%), Gaps = 19/242 (7%)
Query: 187 YSHYSSDGQTVTASELTNFLIREQNETNVNEREVSRHMRDYLQD-----EQRNVQEPY-- 239
+ YS +G+ ++ EL F+ Q E + DY+QD + NV +
Sbjct: 30 FEAYSRNGK-MSFDELLRFVSEVQGERHAG--------LDYVQDIFHSVKHHNVFHHHGL 80
Query: 240 FTFMEFIDFLFSKQNELWDQQYDAIHQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAY 299
F +LFS N +H DM PLSHYF+ + HN+YLTG+Q +S SS E
Sbjct: 81 VHLNAFYRYLFSDTNSPLPMSGQ-VHHDMKAPLSHYFVYTGHNSYLTGNQVNSRSSVEPI 139
Query: 300 VRCLRQGCRCIELDCWDGPDGTPI-VYHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILS 358
V+ LR+G + IELD W P G V HG TLT+ + + I+D+AF+ S YPV+++
Sbjct: 140 VQALRKGVKVIELDLWPNPSGNAAEVRHGRTLTSHEDLQKCLNAIKDNAFQVSDYPVVIT 199
Query: 359 IEDNCSLPQQRVMAQIMLDIFKDMLLIHPVEKNETVLPSPHQLRGKILLKHKKLPEGSDE 418
+ED+ Q +A+++ F+ ML E + PSP +L+ KIL+ K E +
Sbjct: 200 LEDHLPPNLQAQVAKMLTKTFRGMLFRCTSESTKH-FPSPEELKNKILISTKPPKEYLES 258
Query: 419 QT 420
+T
Sbjct: 259 KT 260
>gnl|CDD|177875 PLN02230, PLN02230, phosphoinositide phospholipase C 4.
Length = 598
Score = 124 bits (313), Expect = 1e-29
Identities = 91/254 (35%), Positives = 132/254 (51%), Gaps = 23/254 (9%)
Query: 192 SDGQTVTASELTNFLIREQN----ETNVNERE-----VSRHMRDYLQDEQRNVQEPYFTF 242
+DG + E L+ E+ ET++ E E V R + +RN+ T
Sbjct: 39 ADGDAHMSPEQLQKLMAEEGGGEGETSLEEAERIVDEVLRRKHHIAKFTRRNL-----TL 93
Query: 243 MEFIDFLFSKQNELWDQQYDAIHQDMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRC 302
+F +LFS +L D +HQ+M PLSHYFI + HN+YLTG+Q SS S
Sbjct: 94 DDFNYYLFS--TDLNPPIADQVHQNMDAPLSHYFIFTGHNSYLTGNQLSSNCSELPIADA 151
Query: 303 LRQGCRCIELDCWDGPDGTP--IVYHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSIE 360
LR+G R +ELD W P GT V HG TLT ++K + +I+ +AF SKYPVI+++E
Sbjct: 152 LRRGVRVVELDLW--PRGTDDVCVKHGRTLTKEVKLGKCLDSIKANAFAISKYPVIITLE 209
Query: 361 DNCSLPQQRVMAQIMLDIFKDMLLIHPVEKNETVLPSPHQLRGKILLKHKKLPEGSDEQT 420
D+ + Q +A+++ F DML H E + PSP +L+ KIL+ K P +
Sbjct: 210 DHLTPKLQFKVAKMITQTFGDMLYYHDSEGCQE-FPSPEELKEKILISTK--PPKEYLEA 266
Query: 421 PCAIAKDEGKLAED 434
A KD G+ +D
Sbjct: 267 NDAKEKDNGEKGKD 280
>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 = 108 bits (273), Expect = 6e-29
Identities = 39/54 (72%), Positives = 46/54 (85%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
TVKALYDY+A+ DELSF KHAII+NV + +GGWWRGDYGGK+ WFP+NYV E
Sbjct: 1 TVKALYDYRAQRPDELSFCKHAIITNVEKEDGGWWRGDYGGKKQKWFPANYVEE 54
>gnl|CDD|214585 smart00252, SH2, Src homology 2 domains. Src homology 2 domains
bind phosphotyrosine-containing polypeptides via 2
surface pockets. Specificity is provided via interaction
with residues that are distinct from the
phosphotyrosine. Only a single occurrence of a SH2
domain has been found in S. cerevisiae.
Length = 84
Score = 107 bits (269), Expect = 6e-28
Identities = 43/90 (47%), Positives = 54/90 (60%), Gaps = 6/90 (6%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSK 560
+ W+HG +S R EAE LL+ GDG FLVR+SE+ GDY LS +G+V H RIR
Sbjct: 1 QPWYHGFIS--REEAEKLLKNE---GDGDFLVRDSESSPGDYVLSVRVKGKVKHYRIRRN 55
Query: 561 PESGQFYLVEKSYFDSLYSLISHYRTNHLR 590
E G+FYL F SL L+ HY+ N L
Sbjct: 56 -EDGKFYLEGGRKFPSLVELVEHYQKNSLG 84
Score = 98.1 bits (245), Expect = 1e-24
Identities = 37/84 (44%), Positives = 52/84 (61%), Gaps = 3/84 (3%)
Query: 661 EWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRV--EGRL 718
WYH +R +AE LL+ DG FLVR SE+ YV+S R + K+KH RIR +G+
Sbjct: 2 PWYHGFISREEAEKLLKNEG-DGDFLVRDSESSPGDYVLSVRVKGKVKHYRIRRNEDGKF 60
Query: 719 YTIGTTQFESLVELISYYERHPLY 742
Y G +F SLVEL+ +Y+++ L
Sbjct: 61 YLEGGRKFPSLVELVEHYQKNSLG 84
Score = 43.8 bits (104), Expect = 2e-05
Identities = 17/41 (41%), Positives = 27/41 (65%), Gaps = 2/41 (4%)
Query: 433 EDKIKHCRIRV--EGRLYTIGTTQFESLVELISYYERHPLY 471
+ K+KH RIR +G+ Y G +F SLVEL+ +Y+++ L
Sbjct: 44 KGKVKHYRIRRNEDGKFYLEGGRKFPSLVELVEHYQKNSLG 84
>gnl|CDD|215658 pfam00017, SH2, SH2 domain.
Length = 77
Score = 101 bits (254), Expect = 5e-26
Identities = 40/82 (48%), Positives = 52/82 (63%), Gaps = 5/82 (6%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W+HG++S R EAE LL DGTFLVRESE+ GDY+LS GRV H RI+S +
Sbjct: 1 WYHGKIS--REEAERLLLNPKP--DGTFLVRESESKPGDYTLSVRDDGRVKHYRIQSL-D 55
Query: 563 SGQFYLVEKSYFDSLYSLISHY 584
+G +Y+ F+SL L+ HY
Sbjct: 56 NGGYYISGGVTFNSLPELVEHY 77
Score = 90.3 bits (225), Expect = 5e-22
Identities = 32/77 (41%), Positives = 42/77 (54%), Gaps = 2/77 (2%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRV--EGRLY 719
WYH +R +AE LL DG FLVR SE+ Y +S R + ++KH RI+ G Y
Sbjct: 1 WYHGKISREEAERLLLNPKPDGTFLVRESESKPGDYTLSVRDDGRVKHYRIQSLDNGGYY 60
Query: 720 TIGTTQFESLVELISYY 736
G F SL EL+ +Y
Sbjct: 61 ISGGVTFNSLPELVEHY 77
Score = 36.0 bits (84), Expect = 0.006
Identities = 13/35 (37%), Positives = 19/35 (54%), Gaps = 2/35 (5%)
Query: 433 EDKIKHCRIRV--EGRLYTIGTTQFESLVELISYY 465
+ ++KH RI+ G Y G F SL EL+ +Y
Sbjct: 43 DGRVKHYRIQSLDNGGYYISGGVTFNSLPELVEHY 77
>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 = 95.4 bits (237), Expect = 4e-24
Identities = 38/55 (69%), Positives = 46/55 (83%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAEI 840
VKAL+DY+A+ +DEL+F K+AII NV + EGGWWRGDYGGK+ WFPSNYV EI
Sbjct: 5 AVKALFDYKAQREDELTFTKNAIIQNVEKQEGGWWRGDYGGKKQLWFPSNYVEEI 59
>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 = 89.9 bits (223), Expect = 4e-22
Identities = 36/55 (65%), Positives = 45/55 (81%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAEI 840
TVKALYDY+A+ DELSF K A+I NV++ GGWW+GDYGGK H+FPSNYV ++
Sbjct: 1 TVKALYDYRAKRSDELSFCKGALIHNVSKETGGWWKGDYGGKVQHYFPSNYVEDV 55
>gnl|CDD|165867 PLN02223, PLN02223, phosphoinositide phospholipase C.
Length = 537
Score = 97.4 bits (242), Expect = 6e-21
Identities = 62/241 (25%), Positives = 97/241 (40%), Gaps = 19/241 (7%)
Query: 181 QMFTDSYSHYSSDGQTVTASELTNFLIREQNETNVN-------EREVSRHMRDYLQDEQR 233
F + + Y D L E++E E+ R D L
Sbjct: 20 NFFGNEFHGYDDD-MPELLPRFIELLDTEKDEDGAGLNAAEKIAAELKRRKCDILAFRNL 78
Query: 234 NVQEPYFTFMEFIDFLFSKQ--NELWDQQYDAIHQDMTKPLSHYFINSSHNTYLTGDQ-F 290
E +FLFS + + DQ H DM PLSHYFI++S +Y TG+ F
Sbjct: 79 RCLE----LDHLNEFLFSTELNPPIGDQ---VRHHDMHAPLSHYFIHTSLKSYFTGNNVF 131
Query: 291 SSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVYHGHTLTTKIKFKDVVKTIRDHAF-E 349
S E + L QG R +ELD V ++ ++ + I++HAF +
Sbjct: 132 GKLYSIEPIIDALEQGVRVVELDLLPDGKDGICVRPKWNFEKPLELQECLDAIKEHAFTK 191
Query: 350 TSKYPVILSIEDNCSLPQQRVMAQIMLDIFKDMLLIHPVEKNETVLPSPHQLRGKILLKH 409
YP+I++ +D Q Q++ F DM+ + + PSP +L+ KIL+
Sbjct: 192 CRSYPLIITFKDGLKPDLQSKATQMIDQTFGDMVYHEDPQHSLEEFPSPAELQNKILISR 251
Query: 410 K 410
+
Sbjct: 252 R 252
>gnl|CDD|176498 cd08555, PI-PLCc_GDPD_SF, Catalytic domain of
phosphoinositide-specific phospholipase C-like
phosphodiesterases superfamily. The PI-PLC-like
phosphodiesterases superfamily represents the catalytic
domains of bacterial phosphatidylinositol-specific
phospholipase C (PI-PLC, EC 4.6.1.13), eukaryotic
phosphoinositide-specific phospholipase C (PI-PLC, EC
3.1.4.11), glycerophosphodiester phosphodiesterases
(GP-GDE, EC 3.1.4.46), sphingomyelinases D (SMases D)
(sphingomyelin phosphodiesterase D, EC 3.1.4.41) from
spider venom, SMases D-like proteins, and phospholipase
D (PLD) from several pathogenic bacteria, as well as
their uncharacterized homologs found in organisms
ranging from bacteria and archaea to metazoans, plants,
and fungi. PI-PLCs are ubiquitous enzymes hydrolyzing
the membrane lipid phosphoinositides to yield two
important second messengers, inositol phosphates and
diacylglycerol (DAG). GP-GDEs play essential roles in
glycerol metabolism and catalyze the hydrolysis of
glycerophosphodiesters to sn-glycerol-3-phosphate (G3P)
and the corresponding alcohols that are major sources of
carbon and phosphate. Both, PI-PLCs and GP-GDEs, can
hydrolyze the 3'-5' phosphodiester bonds in different
substrates, and utilize a similar mechanism of general
base and acid catalysis with conserved histidine
residues, which consists of two steps, a phosphotransfer
and a phosphodiesterase reaction. This superfamily also
includes Neurospora crassa ankyrin repeat protein NUC-2
and its Saccharomyces cerevisiae counterpart, Phosphate
system positive regulatory protein PHO81,
glycerophosphodiester phosphodiesterase (GP-GDE)-like
protein SHV3 and SHV3-like proteins (SVLs). The residues
essential for enzyme activities and metal binding are
not conserved in these sequence homologs, which might
suggest that the function of catalytic domains in these
proteins might be distinct from those in typical
PLC-like phosphodiesterases.
Length = 179
Score = 87.5 bits (217), Expect = 7e-20
Identities = 37/138 (26%), Positives = 58/138 (42%), Gaps = 26/138 (18%)
Query: 278 NSSHNTYLTGDQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVYHGHTLT------ 331
SH Y Q E++ EA+ R L G R +ELD DG +VYHG TL
Sbjct: 1 VLSHRGYSQNGQ---ENTLEAFYRALDAGARGLELDVRLTKDGELVVYHGPTLDRTTAGI 57
Query: 332 TKIKFKDVVKTIRDHAFETSKYPVILSIEDNC-SLPQQRVMAQIMLDIFKDMLLIHPVEK 390
++V++ I D+ Y +ILS+E S +A+++ ++
Sbjct: 58 LPPTLEEVLELIADYLK-NPDYTIILSLEIKQDSPEYDEFLAKVLKELRVY--------- 107
Query: 391 NETVLPSPHQLRGKILLK 408
+ LRGK++L
Sbjct: 108 ------FDYDLRGKVVLS 119
>gnl|CDD|198173 cd00173, SH2, Src homology 2 (SH2) domain. In general, SH2 domains
are involved in signal transduction; they bind
pTyr-containing polypeptide ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites. They are present in a wide array
of proteins including: adaptor proteins (Nck1, Crk,
Grb2), scaffolds (Slp76, Shc, Dapp1), kinases (Src, Syk,
Fps, Tec), phosphatases (Shp-1, Shp-2), transcription
factors (STAT1), Ras signaling molecules (Ras-Gap),
ubiquitination factors (c-Cbl), cytoskeleton regulators
(Tensin), signal regulators (SAP), and phospholipid
second messengers (PLCgamma), amongst others.
Length = 79
Score = 83.3 bits (206), Expect = 2e-19
Identities = 36/83 (43%), Positives = 40/83 (48%), Gaps = 6/83 (7%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQ-GRVNHCRIRSKP 561
WFHG +S R EAE LLR DGTFLVRES + GDY LS G+V H I
Sbjct: 2 WFHGSIS--REEAERLLRGKP---DGTFLVRESSSEPGDYVLSVRSGDGKVKHYLIERNE 56
Query: 562 ESGQFYLVEKSYFDSLYSLISHY 584
F SL L+ HY
Sbjct: 57 GGYYLLGGSGRTFPSLPELVEHY 79
Score = 81.7 bits (202), Expect = 6e-19
Identities = 31/80 (38%), Positives = 43/80 (53%), Gaps = 5/80 (6%)
Query: 661 EWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAE-DKIKHCRIRVEGRLY 719
W+H + +R +AE LLR P DG FLVR S ++ YV+S R+ K+KH I Y
Sbjct: 1 PWFHGSISREEAERLLRGKP-DGTFLVRESSSEPGDYVLSVRSGDGKVKHYLIERNEGGY 59
Query: 720 TIG---TTQFESLVELISYY 736
+ F SL EL+ +Y
Sbjct: 60 YLLGGSGRTFPSLPELVEHY 79
Score = 32.8 bits (75), Expect = 0.081
Identities = 11/39 (28%), Positives = 17/39 (43%), Gaps = 3/39 (7%)
Query: 430 KLAEDKIKHCRIRVEGRLYTIG---TTQFESLVELISYY 465
+ + K+KH I Y + F SL EL+ +Y
Sbjct: 41 RSGDGKVKHYLIERNEGGYYLLGGSGRTFPSLPELVEHY 79
>gnl|CDD|198190 cd09937, SH2_csk_like, Src homology 2 (SH2) domain found in
Carboxyl-Terminal Src Kinase (Csk). Both the C-terminal
Src kinase (CSK) and CSK-homologous kinase (CHK) are
members of the CSK-family of protein tyrosine kinases.
These proteins suppress activity of Src-family kinases
(SFK) by selectively phosphorylating the conserved
C-terminal tail regulatory tyrosine by a similar
mechanism. CHK is also capable of inhibiting SFKs by a
non-catalytic mechanism that involves binding of CHK to
SFKs to form stable protein complexes. The
unphosphorylated form of SFKs is inhibited by CSK and
CHK by a two-step mechanism. The first step involves the
formation of a complex of SFKs with CSK/CHK with the
SFKs in the complex are inactive. The second step,
involves the phosphorylation of the C-terminal tail
tyrosine of SFKs, which then dissociates and adopt an
inactive conformation. The structural basis of how the
phosphorylated SFKs dissociate from CSK/CHK to adopt the
inactive conformation is not known. The inactive
conformation of SFKs is stabilized by two intramolecular
inhibitory interactions: (a) the pYT:SH2 interaction in
which the phosphorylated C-terminal tail tyrosine (YT)
binds to the SH2 domain, and (b) the linker:SH3
interaction of which the SH2-kinase domain linker binds
to the SH3 domain. SFKs are activated by multiple
mechanisms including binding of the ligands to the SH2
and SH3 domains to displace the two inhibitory
intramolecular interactions, autophosphorylation, and
dephosphorylation of YT. By selective phosphorylation
and the non-catalytic inhibitory mechanism CSK and CHK
are able to inhibit the active forms of SFKs. CSK and
CHK are regulated by phosphorylation and inter-domain
interactions. They both contain SH3, SH2, and kinase
domains separated by the SH3-SH2 connector and SH2
kinase linker, intervening segments separating the three
domains. They lack a conserved tyrosine phosphorylation
site in the kinase domain and the C-terminal tail
regulatory tyrosine phosphorylation site. The CSK SH2
domain is crucial for stabilizing the kinase domain in
the active conformation. A disulfide bond here regulates
CSK kinase activity. The subcellular localization and
activity of CSK are regulated by its SH2 domain. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 98
Score = 78.1 bits (193), Expect = 2e-17
Identities = 35/85 (41%), Positives = 53/85 (62%), Gaps = 7/85 (8%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
WFHG++S R EAE LL+ DG FLVRES + GDY+L ++G+V H R+ +
Sbjct: 5 WFHGKIS--REEAERLLQ---PPEDGLFLVRESTNYPGDYTLCVSFEGKVEHYRVIYR-- 57
Query: 563 SGQFYLVEKSYFDSLYSLISHYRTN 587
+G+ + E+ YF++L L+ HY +
Sbjct: 58 NGKLTIDEEEYFENLIQLVEHYTKD 82
Score = 57.3 bits (139), Expect = 3e-10
Identities = 28/78 (35%), Positives = 43/78 (55%), Gaps = 2/78 (2%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLYTI 721
W+H +R +AE LL+ P DG FLVR S N Y + E K++H R+ TI
Sbjct: 5 WFHGKISREEAERLLQP-PEDGLFLVRESTNYPGDYTLCVSFEGKVEHYRVIYRNGKLTI 63
Query: 722 GTTQ-FESLVELISYYER 738
+ FE+L++L+ +Y +
Sbjct: 64 DEEEYFENLIQLVEHYTK 81
>gnl|CDD|199827 cd09933, SH2_Src_family, Src homology 2 (SH2) domain found in the
Src family of non-receptor tyrosine kinases. The Src
family kinases are nonreceptor tyrosine kinases that
have been implicated in pathways regulating
proliferation, angiogenesis, invasion and metastasis,
and bone metabolism. It is thought that transforming
ability of Src is linked to its ability to activate key
signaling molecules in these pathways, rather than
through direct activity. As such blocking Src activation
has been a target for drug companies. Src family members
can be divided into 3 groups based on their expression
pattern: 1) Src, Fyn, and Yes; 2) Blk, Fgr, Hck, Lck,
and Lyn; and 3) Frk-related kinases Frk/Rak and Iyk/Bsk
Of these, cellular c-Src is the best studied and most
frequently implicated in oncogenesis. The c-Src contains
five distinct regions: a unique N-terminal domain, an
SH3 domain, an SH2 domain, a kinase domain and a
regulatory tail, as do the other members of the family.
Src exists in both active and inactive conformations.
Negative regulation occurs through phosphorylation of
Tyr, resulting in an intramolecular association between
phosphorylated Tyr and the SH2 domain of SRC, which
locks the protein in a closed conformation. Further
stabilization of the inactive state occurs through
interactions between the SH3 domain and a proline-rich
stretch of residues within the kinase domain.
Conversely, dephosphorylation of Tyr allows SRC to
assume an open conformation. Full activity requires
additional autophosphorylation of a Tyr residue within
the catalytic domain. Loss of the negative-regulatory
C-terminal segment has been shown to result in increased
activity and transforming potential. Phosphorylation of
the C-terminal Tyr residue by C-terminal Src kinase
(Csk) and Csk homology kinase results in increased
intramolecular interactions and consequent Src
inactivation. Specific phosphatases, protein tyrosine
phosphatase a (PTPa) and the SH-containing phosphatases
SHP1/SHP2, have also been shown to take a part in Src
activation. Src is also activated by direct binding of
focal adhesion kinase (Fak) and Crk-associated substrate
(Cas) to the SH2 domain. SRC activity can also be
regulated by numerous receptor tyrosine kinases (RTKs),
such as Her2, epidermal growth factor receptor (EGFR),
fibroblast growth factor receptor, platelet-derived
growth factor receptor (PDGFR), and vascular endothelial
growth factor receptor (VEGFR). In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 76.1 bits (188), Expect = 9e-17
Identities = 37/92 (40%), Positives = 51/92 (55%), Gaps = 9/92 (9%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSF--WWQGR---VNHC 555
E+WF G++ R +AE LL GTFL+RESET G YSLS R V H
Sbjct: 3 EEWFFGKIK--RKDAEKLLL-APGNPRGTFLIRESETTPGAYSLSVRDGDDARGDTVKHY 59
Query: 556 RIRSKPESGQFYLVEKSYFDSLYSLISHYRTN 587
RIR K ++G +Y+ ++ F +L L+ HY +
Sbjct: 60 RIR-KLDNGGYYITTRATFPTLQELVQHYSKD 90
Score = 64.9 bits (159), Expect = 8e-13
Identities = 31/91 (34%), Positives = 41/91 (45%), Gaps = 10/91 (10%)
Query: 658 EDKEWYHPTATRSQAEDLL--RRVPSDGAFLVRPSENDNSSYVISFRAEDK-----IKHC 710
E +EW+ R AE LL P G FL+R SE +Y +S R D +KH
Sbjct: 1 EAEEWFFGKIKRKDAEKLLLAPGNPR-GTFLIRESETTPGAYSLSVRDGDDARGDTVKHY 59
Query: 711 RIRV--EGRLYTIGTTQFESLVELISYYERH 739
RIR G Y F +L EL+ +Y +
Sbjct: 60 RIRKLDNGGYYITTRATFPTLQELVQHYSKD 90
Score = 39.5 bits (93), Expect = 7e-04
Identities = 14/45 (31%), Positives = 20/45 (44%), Gaps = 2/45 (4%)
Query: 426 KDEGKLAEDKIKHCRIRV--EGRLYTIGTTQFESLVELISYYERH 468
+D D +KH RIR G Y F +L EL+ +Y +
Sbjct: 46 RDGDDARGDTVKHYRIRKLDNGGYYITTRATFPTLQELVQHYSKD 90
>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 = 73.5 bits (181), Expect = 2e-16
Identities = 27/54 (50%), Positives = 34/54 (62%), Gaps = 1/54 (1%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
V+A ++++ N+DELSF K II+ EGGWW G GK WFPSNYV E
Sbjct: 1 LVRAKFNFEGTNEDELSFDKGDIITVTQVVEGGWWEGTLNGK-TGWFPSNYVKE 53
>gnl|CDD|198196 cd09943, SH2_Nck_family, Src homology 2 (SH2) domain found in the
Nck family. Nck proteins are adaptors that modulate
actin cytoskeleton dynamics by linking proline-rich
effector molecules to tyrosine kinases or phosphorylated
signaling intermediates. There are two members known in
this family: Nck1 (Nckalpha) and Nck2 (Nckbeta and
Growth factor receptor-bound protein 4 (Grb4)). They
are characterized by having 3 SH3 domains and a
C-terminal SH2 domain. Nck1 and Nck2 have overlapping
functions as determined by gene knockouts. Both bind
receptor tyrosine kinases and other
tyrosine-phosphorylated proteins through their SH2
domains. In addition they also bind distinct targets.
Neuronal signaling proteins: EphrinB1, EphrinB2, and
Disabled-1 (Dab-1) all bind to Nck-2 exclusively. And in
the case of PDGFR, Tyr(P)751 binds to Nck1 while
Tyr(P)1009 binds to Nck2. Nck1 and Nck2 have a role in
the infection process of enteropathogenic Escherichia
coli (EPEC). Their SH3 domains are involved in
recruiting and activating the N-WASP/Arp2/3 complex
inducing actin polymerization resulting in the
production of pedestals, dynamic bacteria-presenting
protrusions of the plasma membrane. A similar thing
occurs in the vaccinia virus where motile plasma
membrane projections are formed beneath the virus.
Recently it has been shown that the SH2 domains of both
Nck1 and Nck2 bind the G-protein coupled receptor
kinase-interacting protein 1 (GIT1) in a
phosphorylation-dependent manner. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 93
Score = 74.1 bits (182), Expect = 4e-16
Identities = 29/83 (34%), Positives = 51/83 (61%)
Query: 660 KEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLY 719
+ WY+ TR QAE LL +G FL+R SE++ Y +S +A + KH +++V +Y
Sbjct: 1 QPWYYGRITRHQAETLLNEHGHEGDFLIRDSESNPGDYSVSLKAPGRNKHFKVQVVDNVY 60
Query: 720 TIGTTQFESLVELISYYERHPLY 742
IG +F ++ EL+ +Y++ P++
Sbjct: 61 CIGQRKFHTMDELVEHYKKAPIF 83
Score = 55.2 bits (133), Expect = 2e-09
Identities = 28/84 (33%), Positives = 48/84 (57%), Gaps = 7/84 (8%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W++GR++ R +AE LL + H +G FL+R+SE+ GDYS+S GR H +++
Sbjct: 3 WYYGRIT--RHQAETLLNEHGH--EGDFLIRDSESNPGDYSVSLKAPGRNKHFKVQVVDN 58
Query: 563 SGQFYLVEKSYFDSLYSLISHYRT 586
Y + + F ++ L+ HY+
Sbjct: 59 V---YCIGQRKFHTMDELVEHYKK 79
Score = 36.0 bits (83), Expect = 0.010
Identities = 12/40 (30%), Positives = 26/40 (65%)
Query: 432 AEDKIKHCRIRVEGRLYTIGTTQFESLVELISYYERHPLY 471
A + KH +++V +Y IG +F ++ EL+ +Y++ P++
Sbjct: 44 APGRNKHFKVQVVDNVYCIGQRKFHTMDELVEHYKKAPIF 83
>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 = 71.4 bits (176), Expect = 1e-15
Identities = 26/53 (49%), Positives = 36/53 (67%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVA 838
V+ALYDY A++ DELSF K II+ + +++ GWW+G G + FPSNYV
Sbjct: 4 QVRALYDYTAQDPDELSFKKGDIITVLEKSDDGWWKGRLGRGKEGLFPSNYVE 56
>gnl|CDD|198217 cd10354, SH2_Cterm_RasGAP, C-terminal Src homology 2 (SH2) domain
found in Ras GTPase-activating protein 1 (GAP). RasGAP
is part of the GAP1 family of GTPase-activating
proteins. The protein is located in the cytoplasm and
stimulates the GTPase activity of normal RAS p21, but
not its oncogenic counterpart. Acting as a suppressor of
RAS function, the protein enhances the weak intrinsic
GTPase activity of RAS proteins resulting in RAS
inactivation, thereby allowing control of cellular
proliferation and differentiation. Mutations leading to
changes in the binding sites of either protein are
associated with basal cell carcinomas. Alternative
splicing results in two isoforms. The shorter isoform
which lacks the N-terminal hydrophobic region, has the
same activity, and is expressed in placental tissues.
In general longer isoform contains 2 SH2 domains, a SH3
domain, a pleckstrin homology (PH) domain, and a
calcium-dependent phospholipid-binding C2 domain. The
C-terminus contains the catalytic domain of RasGap which
catalyzes the activation of Ras by hydrolyzing GTP-bound
active Ras into an inactive GDP-bound form of Ras. This
model contains the C-terminal SH2 domain. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 77
Score = 72.1 bits (177), Expect = 1e-15
Identities = 28/77 (36%), Positives = 43/77 (55%), Gaps = 1/77 (1%)
Query: 661 EWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRL-Y 719
W+H +R +A ++L +V G+FLVR S+N Y +SFR + IKH +I G +
Sbjct: 1 IWFHGKISREEAYNMLVKVGGPGSFLVRESDNTPGDYSLSFRVNEGIKHFKIIPTGNNQF 60
Query: 720 TIGTTQFESLVELISYY 736
+G F SL ++I Y
Sbjct: 61 MMGGRYFSSLDDVIDRY 77
Score = 67.4 bits (165), Expect = 5e-14
Identities = 33/83 (39%), Positives = 46/83 (55%), Gaps = 6/83 (7%)
Query: 502 KWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKP 561
WFHG++S R EA ++L + G+FLVRES+ GDYSLSF + H +I
Sbjct: 1 IWFHGKIS--REEAYNMLVKVGG--PGSFLVRESDNTPGDYSLSFRVNEGIKHFKIIPTG 56
Query: 562 ESGQFYLVEKSYFDSLYSLISHY 584
+ QF + + YF SL +I Y
Sbjct: 57 -NNQFMMGGR-YFSSLDDVIDRY 77
>gnl|CDD|198203 cd10340, SH2_N-SH2_SHP_like, N-terminal Src homology 2 (N-SH2)
domain found in SH2 domain Phosphatases (SHP) proteins.
The SH2 domain phosphatases (SHP-1, SHP-2/Syp,
Drosophila corkscrew (csw), and Caenorhabditis elegans
Protein Tyrosine Phosphatase (Ptp-2)) are cytoplasmic
signaling enzymes. They are both targeted and regulated
by interactions of their SH2 domains with
phosphotyrosine docking sites. These proteins contain
two SH2 domains (N-SH2, C-SH2) followed by a tyrosine
phosphatase (PTP) domain, and a C-terminal extension.
Shp1 and Shp2 have two tyrosyl phosphorylation sites in
their C-tails, which are phosphorylated differentially
by receptor and nonreceptor PTKs. Csw retains the
proximal tyrosine and Ptp-2 lacks both sites.
Shp-binding proteins include receptors, scaffolding
adapters, and inhibitory receptors. Some of these bind
both Shp1 and Shp2 while others bind only one. Most
proteins that bind a Shp SH2 domain contain one or more
immuno-receptor tyrosine-based inhibitory motifs
(ITIMs): [IVL]xpYxx[IVL]. Shp1 N-SH2 domain blocks the
catalytic domain and keeps the enzyme in the inactive
conformation, and is thus believed to regulate the
phosphatase activity of SHP-1. Its C-SH2 domain is
thought to be involved in searching for phosphotyrosine
activators. The SHP2 N-SH2 domain is a conformational
switch; it either binds and inhibits the phosphatase, or
it binds phosphoproteins and activates the enzyme. The
C-SH2 domain contributes binding energy and specificity,
but it does not have a direct role in activation. Csw
SH2 domain function is essential, but either SH2 domain
can fulfill this requirement. The role of the csw SH2
domains during Sevenless receptor tyrosine kinase (SEV)
signaling is to bind Daughter of Sevenless rather than
activated SEV. Ptp-2 acts in oocytes downstream of
sheath/oocyte gap junctions to promote major sperm
protein (MSP)-induced MAP Kinase (MPK-1)
phosphorylation. Ptp-2 functions in the oocyte
cytoplasm, not at the cell surface to inhibit multiple
RasGAPs, resulting in sustained Ras activation. It is
thought that MSP triggers PTP-2/Ras activation and ROS
production to stimulate MPK-1 activity essential for
oocyte maturation and that secreted MSP domains and
Cu/Zn superoxide dismutases function antagonistically to
control ROS and MAPK signaling. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 99
Score = 71.7 bits (176), Expect = 3e-15
Identities = 35/97 (36%), Positives = 55/97 (56%), Gaps = 7/97 (7%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLY-T 720
W+HP + +AE+LL+ DG+FL RPS+++ + +S R D++ H +I+ G Y
Sbjct: 2 WFHPVISGIEAENLLKTRGVDGSFLARPSKSNPGDFTLSVRRGDEVTHIKIQNTGDYYDL 61
Query: 721 IGTTQFESLVELISYYERHP--LYKK----IELWYPV 751
G +F +L EL+ YY L +K IEL YP+
Sbjct: 62 YGGEKFATLSELVQYYMEQHGQLREKNGDVIELKYPL 98
Score = 48.9 bits (117), Expect = 3e-07
Identities = 36/106 (33%), Positives = 58/106 (54%), Gaps = 15/106 (14%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
WFH +SG EAE+LL+ DG+FL R S++ GD++LS V H +I++
Sbjct: 2 WFHPVISG--IEAENLLKTRGV--DGSFLARPSKSNPGDFTLSVRRGDEVTHIKIQN--- 54
Query: 563 SGQFYLV---EKSYFDSLYSLISHYRTNHLRSQE---FLITLQEPV 602
+G +Y + EK F +L L+ +Y H + +E +I L+ P+
Sbjct: 55 TGDYYDLYGGEK--FATLSELVQYYMEQHGQLREKNGDVIELKYPL 98
Score = 35.5 bits (82), Expect = 0.018
Identities = 19/54 (35%), Positives = 28/54 (51%), Gaps = 7/54 (12%)
Query: 434 DKIKHCRIRVEGRLY-TIGTTQFESLVELISYYERHP--LYKK----IELWYPV 480
D++ H +I+ G Y G +F +L EL+ YY L +K IEL YP+
Sbjct: 45 DEVTHIKIQNTGDYYDLYGGEKFATLSELVQYYMEQHGQLREKNGDVIELKYPL 98
>gnl|CDD|198193 cd09940, SH2_Vav_family, Src homology 2 (SH2) domain found in the
Vav family. Vav proteins are involved in several
processes that require cytoskeletal reorganization, such
as the formation of the immunological synapse (IS),
phagocytosis, platelet aggregation, spreading, and
transformation. Vavs function as guanine nucleotide
exchange factors (GEFs) for the Rho/Rac family of
GTPases. Vav family members have several conserved
motifs/domains including: a leucine-rich region, a
leucine-zipper, a calponin homology (CH) domain, an
acidic domain, a Dbl-homology (DH) domain, a pleckstrin
homology (PH) domain, a cysteine-rich domain, 2 SH3
domains, a proline-rich region, and a SH2 domain. Vavs
are the only known Rho GEFs that have both the DH/PH
motifs and SH2/SH3 domains in the same protein. The
leucine-rich helix-loop-helix (HLH) domain is thought to
be involved in protein heterodimerization with other HLH
proteins and it may function as a negative regulator by
forming inactive heterodimers. The CH domain is usually
involved in the association with filamentous actin, but
in Vav it controls NFAT stimulation, Ca2+ mobilization,
and its transforming activity. Acidic domains are
involved in protein-protein interactions and contain
regulatory tyrosines. The DH domain is a GDP-GTP
exchange factor on Rho/Rac GTPases. The PH domain in
involved in interactions with GTP-binding proteins,
lipids and/or phosphorylated serine/threonine residues.
The SH3 domain is involved in localization of proteins
to specific sites within the cell interacting with
protein with proline-rich sequences. The SH2 domain
mediates a high affinity interaction with tyrosine
phosphorylated proteins. There are three Vav mammalian
family members: Vav1 which is expressed in the
hematopoietic system, Vav2 and Vav3 are more
ubiquitously expressed. The members here include insect
and amphibian Vavs. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 102
Score = 71.6 bits (176), Expect = 4e-15
Identities = 30/84 (35%), Positives = 44/84 (52%), Gaps = 3/84 (3%)
Query: 660 KEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI--RVEGR 717
W+ R AE+ L P DG +LVR + Y +S + +KH +I R +G
Sbjct: 5 FLWFVGEMERDTAENRLENRP-DGTYLVRVRPQGETQYALSIKYNGDVKHMKIEQRSDGL 63
Query: 718 LYTIGTTQFESLVELISYYERHPL 741
Y + F+SLVEL++YYER+ L
Sbjct: 64 YYLSESRHFKSLVELVNYYERNSL 87
Score = 61.2 bits (149), Expect = 1e-11
Identities = 31/88 (35%), Positives = 44/88 (50%), Gaps = 6/88 (6%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
WF G + R AE+ L DGT+LVR Y+LS + G V H +I + +
Sbjct: 7 WFVGEM--ERDTAENRLENRP---DGTYLVRVRPQGETQYALSIKYNGDVKHMKIEQRSD 61
Query: 563 SGQFYLVEKSYFDSLYSLISHYRTNHLR 590
G +YL E +F SL L+++Y N L
Sbjct: 62 -GLYYLSESRHFKSLVELVNYYERNSLG 88
Score = 39.2 bits (92), Expect = 8e-04
Identities = 17/40 (42%), Positives = 25/40 (62%), Gaps = 2/40 (5%)
Query: 433 EDKIKHCRI--RVEGRLYTIGTTQFESLVELISYYERHPL 470
+KH +I R +G Y + F+SLVEL++YYER+ L
Sbjct: 48 NGDVKHMKIEQRSDGLYYLSESRHFKSLVELVNYYERNSL 87
>gnl|CDD|198185 cd09931, SH2_C-SH2_SHP_like, C-terminal Src homology 2 (C-SH2)
domain found in SH2 domain Phosphatases (SHP) proteins.
The SH2 domain phosphatases (SHP-1, SHP-2/Syp,
Drosophila corkscrew (csw), and Caenorhabditis elegans
Protein Tyrosine Phosphatase (Ptp-2)) are cytoplasmic
signaling enzymes. They are both targeted and regulated
by interactions of their SH2 domains with
phosphotyrosine docking sites. These proteins contain
two SH2 domains (N-SH2, C-SH2) followed by a tyrosine
phosphatase (PTP) domain, and a C-terminal extension.
Shp1 and Shp2 have two tyrosyl phosphorylation sites in
their C-tails, which are phosphorylated differentially
by receptor and nonreceptor PTKs. Csw retains the
proximal tyrosine and Ptp-2 lacks both sites.
Shp-binding proteins include receptors, scaffolding
adapters, and inhibitory receptors. Some of these bind
both Shp1 and Shp2 while others bind only one. Most
proteins that bind a Shp SH2 domain contain one or more
immuno-receptor tyrosine-based inhibitory motifs
(ITIMs): [SIVL]xpYxx[IVL]. Shp1 N-SH2 domain blocks the
catalytic domain and keeps the enzyme in the inactive
conformation, and is thus believed to regulate the
phosphatase activity of SHP-1. Its C-SH2 domain is
thought to be involved in searching for phosphotyrosine
activators. The SHP2 N-SH2 domain is a conformational
switch; it either binds and inhibits the phosphatase, or
it binds phosphoproteins and activates the enzyme. The
C-SH2 domain contributes binding energy and specificity,
but it does not have a direct role in activation. Csw
SH2 domain function is essential, but either SH2 domain
can fulfill this requirement. The role of the csw SH2
domains during Sevenless receptor tyrosine kinase (SEV)
signaling is to bind Daughter of Sevenless rather than
activated SEV. Ptp-2 acts in oocytes downstream of
sheath/oocyte gap junctions to promote major sperm
protein (MSP)-induced MAP Kinase (MPK-1)
phosphorylation. Ptp-2 functions in the oocyte
cytoplasm, not at the cell surface to inhibit multiple
RasGAPs, resulting in sustained Ras activation. It is
thought that MSP triggers PTP-2/Ras activation and ROS
production to stimulate MPK-1 activity essential for
oocyte maturation and that secreted MSP domains and
Cu/Zn superoxide dismutases function antagonistically to
control ROS and MAPK signaling. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 99
Score = 71.2 bits (175), Expect = 5e-15
Identities = 29/82 (35%), Positives = 50/82 (60%), Gaps = 2/82 (2%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRA-EDKIKHCRIRVEGRLYT 720
W+H + +AE LL G+FLVR S++ +V+S R +DK+ H IR +G Y
Sbjct: 2 WFHGHLSGKEAEKLLLEKGKPGSFLVRESQSKPGDFVLSVRTDDDKVTHIMIRCQGGKYD 61
Query: 721 I-GTTQFESLVELISYYERHPL 741
+ G +F+SL +L+ +Y+++P+
Sbjct: 62 VGGGEEFDSLTDLVEHYKKNPM 83
Score = 63.5 bits (155), Expect = 2e-12
Identities = 36/87 (41%), Positives = 48/87 (55%), Gaps = 7/87 (8%)
Query: 502 KWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWW-QGRVNHCRIRSK 560
+WFHG LSG EAE LL G+FLVRES++ GD+ LS +V H IR
Sbjct: 1 RWFHGHLSGK--EAEKLLLEKGK--PGSFLVRESQSKPGDFVLSVRTDDDKVTHIMIRC- 55
Query: 561 PESGQFYLVEKSYFDSLYSLISHYRTN 587
+ G++ + FDSL L+ HY+ N
Sbjct: 56 -QGGKYDVGGGEEFDSLTDLVEHYKKN 81
Score = 38.4 bits (90), Expect = 0.002
Identities = 14/42 (33%), Positives = 28/42 (66%), Gaps = 1/42 (2%)
Query: 430 KLAEDKIKHCRIRVEGRLYTI-GTTQFESLVELISYYERHPL 470
+ +DK+ H IR +G Y + G +F+SL +L+ +Y+++P+
Sbjct: 42 RTDDDKVTHIMIRCQGGKYDVGGGEEFDSLTDLVEHYKKNPM 83
>gnl|CDD|198189 cd09935, SH2_ABL, Src homology 2 (SH2) domain found in Abelson
murine lymphosarcoma virus (ABL) proteins. ABL-family
proteins are highly conserved tyrosine kinases. Each ABL
protein contains an SH3-SH2-TK (Src homology 3-Src
homology 2-tyrosine kinase) domain cassette, which
confers autoregulated kinase activity and is common
among nonreceptor tyrosine kinases. Several types of
posttranslational modifications control ABL catalytic
activity, subcellular localization, and stability, with
consequences for both cytoplasmic and nuclear ABL
functions. Binding partners provide additional
regulation of ABL catalytic activity, substrate
specificity, and downstream signaling. By combining this
cassette with actin-binding and -bundling domain, ABL
proteins are capable of connecting phosphoregulation
with actin-filament reorganization. Vertebrate paralogs,
ABL1 and ABL2, have evolved to perform specialized
functions. ABL1 includes nuclear localization signals
and a DNA binding domain which is used to mediate DNA
damage-repair functions, while ABL2 has additional
binding capacity for actin and for microtubules to
enhance its cytoskeletal remodeling functions. SH2 is
involved in several autoinhibitory mechanism that
constrain the enzymatic activity of the ABL-family
kinases. In one mechanism SH2 and SH3 cradle the kinase
domain while a cap sequence stabilizes the inactive
conformation resulting in a locked inactive state.
Another involves phosphatidylinositol 4,5-bisphosphate
(PIP2) which binds the SH2 domain through residues
normally required for phosphotyrosine binding in the
linker segment between the SH2 and kinase domains. The
SH2 domain contributes to ABL catalytic activity and
target site specificity. It is thought that the ABL
catalytic site and SH2 pocket have coevolved to
recognize the same sequences. Recent work now supports a
hierarchical processivity model in which the substrate
target site most compatible with ABL kinase domain
preferences is phosphorylated with greatest efficiency.
If this site is compatible with the ABL SH2 domain
specificity, it will then reposition and dock in the SH2
pocket. This mechanism also explains how ABL kinases
phosphorylates poor targets on the same substrate if
they are properly positioned and how relatively poor
substrate proteins might be recruited to ABL through a
complex with strong substrates that can also dock with
the SH2 pocket. In general SH2 domains are involved in
signal transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 94
Score = 70.1 bits (172), Expect = 9e-15
Identities = 36/86 (41%), Positives = 52/86 (60%), Gaps = 6/86 (6%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W+HG +S R AE LL S +G+FLVRESE+ G YS+S + GRV H RI S+
Sbjct: 5 WYHGPIS--RNAAEYLL---SSGINGSFLVRESESSPGQYSISLRYDGRVYHYRI-SEDS 58
Query: 563 SGQFYLVEKSYFDSLYSLISHYRTNH 588
G+ Y+ ++ F++L L+ H+ N
Sbjct: 59 DGKVYVTQEHRFNTLAELVHHHSKNA 84
Score = 58.2 bits (141), Expect = 1e-10
Identities = 28/81 (34%), Positives = 46/81 (56%), Gaps = 3/81 (3%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRV--EGRLY 719
WYH +R+ AE LL +G+FLVR SE+ Y IS R + ++ H RI +G++Y
Sbjct: 5 WYHGPISRNAAEYLLSS-GINGSFLVRESESSPGQYSISLRYDGRVYHYRISEDSDGKVY 63
Query: 720 TIGTTQFESLVELISYYERHP 740
+F +L EL+ ++ ++
Sbjct: 64 VTQEHRFNTLAELVHHHSKNA 84
>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 = 68.3 bits (168), Expect = 1e-14
Identities = 25/51 (49%), Positives = 35/51 (68%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNY 836
+ALYDY+A++DDELSF K II+ + + + GWW G+ G R FP+NY
Sbjct: 1 YARALYDYEAQDDDELSFKKGDIITVLEKDDDGWWEGELNGGREGLFPANY 51
>gnl|CDD|198210 cd10347, SH2_Nterm_shark_like, N-terminal Src homology 2 (SH2)
domain found in SH2 domains, ANK, and kinase domain
(shark) proteins. These non-receptor protein-tyrosine
kinases contain two SH2 domains, five ankyrin (ANK)-like
repeats, and a potential tyrosine phosphorylation site
in the carboxyl-terminal tail which resembles the
phosphorylation site in members of the src family. Like,
mammalian non-receptor protein-tyrosine kinases, ZAP-70
and syk proteins, they do not have SH3 domains. However,
the presence of ANK makes these unique among
protein-tyrosine kinases. Both tyrosine kinases and ANK
repeats have been shown to transduce developmental
signals, and SH2 domains are known to participate
intimately in tyrosine kinase signaling. These tyrosine
kinases are believed to be involved in epithelial cell
polarity. The members of this family include the shark
(SH2 domains, ANK, and kinase domain) gene in Drosophila
and yellow fever mosquitos, as well as the hydra protein
HTK16. Drosophila Shark is proposed to transduce
intracellularly the Crumbs, a protein necessary for
proper organization of ectodermal epithelia,
intercellular signal. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 81
Score = 69.3 bits (170), Expect = 1e-14
Identities = 37/84 (44%), Positives = 44/84 (52%), Gaps = 3/84 (3%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSK 560
+W+HG++S R AE LL R DG FLVRES + GDY LS QG V H +IR
Sbjct: 1 LRWYHGKIS--REVAEALLLREGG-RDGLFLVRESTSAPGDYVLSLLAQGEVLHYQIRRH 57
Query: 561 PESGQFYLVEKSYFDSLYSLISHY 584
E F F L +LI HY
Sbjct: 58 GEDAFFSDDGPLIFHGLDTLIEHY 81
Score = 55.8 bits (135), Expect = 7e-10
Identities = 30/79 (37%), Positives = 38/79 (48%), Gaps = 4/79 (5%)
Query: 662 WYHPTATRSQAEDLLRRV-PSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGR--- 717
WYH +R AE LL R DG FLVR S + YV+S A+ ++ H +IR G
Sbjct: 3 WYHGKISREVAEALLLREGGRDGLFLVRESTSAPGDYVLSLLAQGEVLHYQIRRHGEDAF 62
Query: 718 LYTIGTTQFESLVELISYY 736
G F L LI +Y
Sbjct: 63 FSDDGPLIFHGLDTLIEHY 81
Score = 36.2 bits (84), Expect = 0.006
Identities = 17/37 (45%), Positives = 19/37 (51%), Gaps = 1/37 (2%)
Query: 613 WYHPTATRSQAEDLLRRV-PSDGAFLVRPSENDNSSY 648
WYH +R AE LL R DG FLVR S + Y
Sbjct: 3 WYHGKISREVAEALLLREGGRDGLFLVRESTSAPGDY 39
>gnl|CDD|199828 cd09941, SH2_Grb2_like, Src homology 2 domain found in Growth
factor receptor-bound protein 2 (Grb2) and similar
proteins. The adaptor proteins here include homologs
Grb2 in humans, Sex muscle abnormal protein 5 (Sem-5) in
Caenorhabditis elegans, and Downstream of receptor
kinase (drk) in Drosophila melanogaster. They are
composed of one SH2 and two SH3 domains. Grb2/Sem-5/drk
regulates the Ras pathway by linking the tyrosine
kinases to the Ras guanine nucleotide releasing protein
Sos, which converts Ras to the active GTP-bound state.
The SH2 domain of Grb2/Sem-5/drk binds class II
phosphotyrosyl peptides while its SH3 domain binds to
Sos and Sos-derived, proline-rich peptides. Besides it
function in Ras signaling, Grb2 is also thought to play
a role in apoptosis. Unlike most SH2 structures in which
the peptide binds in an extended conformation (such that
the +3 peptide residue occupies a hydrophobic pocket in
the protein, conferring a modest degree of selectivity),
Grb2 forms several hydrogen bonds via main chain atoms
with the side chain of +2 Asn. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 95
Score = 68.1 bits (167), Expect = 6e-14
Identities = 36/92 (39%), Positives = 57/92 (61%), Gaps = 8/92 (8%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
WFHG++S RAEAE++L DG FL+RESE+ GD+SLS + V H ++ +
Sbjct: 5 WFHGKIS--RAEAEEILMNQRP--DGAFLIRESESSPGDFSLSVKFGNDVQHFKVL-RDG 59
Query: 563 SGQFYL-VEKSYFDSLYSLISHYRTNHLRSQE 593
+G+++L V K F+SL L+ ++RT + +
Sbjct: 60 AGKYFLWVVK--FNSLNELVDYHRTTSVSRNQ 89
Score = 63.1 bits (154), Expect = 3e-12
Identities = 24/84 (28%), Positives = 47/84 (55%), Gaps = 3/84 (3%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRV--EGRLY 719
W+H +R++AE++L DGAFL+R SE+ + +S + + ++H ++ G+ Y
Sbjct: 5 WFHGKISRAEAEEILMNQRPDGAFLIRESESSPGDFSLSVKFGNDVQHFKVLRDGAGK-Y 63
Query: 720 TIGTTQFESLVELISYYERHPLYK 743
+ +F SL EL+ Y+ + +
Sbjct: 64 FLWVVKFNSLNELVDYHRTTSVSR 87
Score = 44.2 bits (105), Expect = 1e-05
Identities = 18/48 (37%), Positives = 27/48 (56%), Gaps = 3/48 (6%)
Query: 613 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYE-PVPQPN--QH 657
W+H +R++AE++L DGAFL+R SE+ + V N QH
Sbjct: 5 WFHGKISRAEAEEILMNQRPDGAFLIRESESSPGDFSLSVKFGNDVQH 52
>gnl|CDD|198209 cd10346, SH2_SH2B_family, Src homology 2 (SH2) domain found in SH2B
adapter protein family. The SH2B adapter protein family
has 3 members: SH2B1 (SH2-B, PSM), SH2B2 (APS), and
SH2B3 (Lnk). SH2B family members contain a pleckstrin
homology domain, at least one dimerization domain, and a
C-terminal SH2 domain which binds to phosphorylated
tyrosines in a variety of tyrosine kinases. SH2B1 and
SH2B2 function in signaling pathways found downstream
of growth hormone receptor and receptor tyrosine
kinases, including the insulin, insulin-like growth
factor-I (IGF-I), platelet-derived growth factor (PDGF),
nerve growth factor, hepatocyte growth factor, and
fibroblast growth factor receptors. SH2B2beta, a new
isoform of SH2B2, is an endogenous inhibitor of SH2B1
and/or SH2B2 (SH2B2alpha), negatively regulating insulin
signaling and/or JAK2-mediated cellular responses. SH2B3
negatively regulates lymphopoiesis and early
hematopoiesis. The lnk-deficiency results in enhanced
production of B cells, and expansion as well as enhanced
function of hematopoietic stem cells (HSCs),
demonstrating negative regulatory functions of Sh2b3/Lnk
in cytokine signaling. Sh2b3/Lnk also functions in
responses controlled by cell adhesion and in crosstalk
between integrin- and cytokine-mediated signaling. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 97
Score = 66.7 bits (163), Expect = 1e-13
Identities = 35/87 (40%), Positives = 53/87 (60%), Gaps = 4/87 (4%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
WFHG LS R++A L+ G G FLVR+SET G++ L+F +QGR H R+ + E
Sbjct: 10 WFHGTLS--RSDAAQLVLHSGADGHGVFLVRQSETRRGEFVLTFNFQGRAKHLRL-TLNE 66
Query: 563 SGQFYLVEKSYFDSLYSLISHYRTNHL 589
GQ V+ +F S++ ++ H+R N +
Sbjct: 67 KGQCR-VQHLWFPSIFDMLEHFRQNPI 92
Score = 49.0 bits (117), Expect = 2e-07
Identities = 22/83 (26%), Positives = 43/83 (51%), Gaps = 3/83 (3%)
Query: 662 WYHPTATRSQAEDLLRR--VPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLY 719
W+H T +RS A L+ G FLVR SE +V++F + + KH R+ + +
Sbjct: 10 WFHGTLSRSDAAQLVLHSGADGHGVFLVRQSETRRGEFVLTFNFQGRAKHLRLTLNEKGQ 69
Query: 720 T-IGTTQFESLVELISYYERHPL 741
+ F S+ +++ ++ ++P+
Sbjct: 70 CRVQHLWFPSIFDMLEHFRQNPI 92
>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 = 64.6 bits (158), Expect = 3e-13
Identities = 24/55 (43%), Positives = 29/55 (52%), Gaps = 3/55 (5%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKR-MHWFPSNYVAE 839
V +DY A DEL+ II+NV + E GWW G GKR M FP N+V
Sbjct: 1 EVIVEFDYDAEEPDELTLKVGDIITNVKKMEEGWWEGTLNGKRGM--FPDNFVKV 53
>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 = 64.4 bits (157), Expect = 3e-13
Identities = 25/53 (47%), Positives = 35/53 (66%), Gaps = 1/53 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
V AL+ Y A+N+DELSF K II+ +++ + WWRG+ G+ FPSNYV
Sbjct: 2 VIALFPYTAQNEDELSFQKGDIINVLSKDDPDWWRGELNGQ-TGLFPSNYVEP 53
>gnl|CDD|198271 cd10408, SH2_Nck1, Src homology 2 (SH2) domain found in Nck. Nck
proteins are adaptors that modulate actin cytoskeleton
dynamics by linking proline-rich effector molecules to
tyrosine kinases or phosphorylated signaling
intermediates. There are two members known in this
family: Nck1 (Nckalpha) and Nck2 (Nckbeta and Growth
factor receptor-bound protein 4 (Grb4)). They are
characterized by having 3 SH3 domains and a C-terminal
SH2 domain. Nck1 and Nck2 have overlapping functions as
determined by gene knockouts. Both bind receptor
tyrosine kinases and other tyrosine-phosphorylated
proteins through their SH2 domains. In addition they
also bind distinct targets. Neuronal signaling
proteins: EphrinB1, EphrinB2, and Disabled-1 (Dab-1) all
bind to Nck-2 exclusively. And in the case of PDGFR,
Tyr(P)751 binds to Nck1 while Tyr(P)1009 binds to Nck2.
Nck1 and Nck2 have a role in the infection process of
enteropathogenic Escherichia coli (EPEC). Their SH3
domains are involved in recruiting and activating the
N-WASP/Arp2/3 complex inducing actin polymerization
resulting in the production of pedestals, dynamic
bacteria-presenting protrusions of the plasma membrane.
A similar thing occurs in the vaccinia virus where
motile plasma membrane projections are formed beneath
the virus. Recently it has been shown that the SH2
domains of both Nck1 and Nck2 bind the G-protein coupled
receptor kinase-interacting protein 1 (GIT1) in a
phosphorylation-dependent manner. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 97
Score = 65.8 bits (160), Expect = 4e-13
Identities = 28/83 (33%), Positives = 52/83 (62%)
Query: 660 KEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLY 719
WY+ TR QAE L ++G FL+R SE+ + + +S +A+ K KH +++++ +Y
Sbjct: 1 NPWYYGKVTRHQAEMALNERGNEGDFLIRDSESSPNDFSVSLKAQGKNKHFKVQLKECVY 60
Query: 720 TIGTTQFESLVELISYYERHPLY 742
IG +F S+ EL+ +Y++ P++
Sbjct: 61 CIGQRKFSSMEELVEHYKKAPIF 83
Score = 44.6 bits (105), Expect = 9e-06
Identities = 26/84 (30%), Positives = 47/84 (55%), Gaps = 7/84 (8%)
Query: 502 KWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKP 561
W++G+++ R +AE L + GD FL+R+SE+ D+S+S QG+ H +++ K
Sbjct: 2 PWYYGKVT--RHQAEMALNERGNEGD--FLIRDSESSPNDFSVSLKAQGKNKHFKVQLKE 57
Query: 562 ESGQFYLVEKSYFDSLYSLISHYR 585
Y + + F S+ L+ HY+
Sbjct: 58 ---CVYCIGQRKFSSMEELVEHYK 78
Score = 34.6 bits (79), Expect = 0.028
Identities = 13/40 (32%), Positives = 28/40 (70%)
Query: 432 AEDKIKHCRIRVEGRLYTIGTTQFESLVELISYYERHPLY 471
A+ K KH +++++ +Y IG +F S+ EL+ +Y++ P++
Sbjct: 44 AQGKNKHFKVQLKECVYCIGQRKFSSMEELVEHYKKAPIF 83
>gnl|CDD|198272 cd10409, SH2_Nck2, Src homology 2 (SH2) domain found in Nck. Nck
proteins are adaptors that modulate actin cytoskeleton
dynamics by linking proline-rich effector molecules to
tyrosine kinases or phosphorylated signaling
intermediates. There are two members known in this
family: Nck1 (Nckalpha) and Nck2 (Nckbeta and Growth
factor receptor-bound protein 4 (Grb4)). They are
characterized by having 3 SH3 domains and a C-terminal
SH2 domain. Nck1 and Nck2 have overlapping functions as
determined by gene knockouts. Both bind receptor
tyrosine kinases and other tyrosine-phosphorylated
proteins through their SH2 domains. In addition they
also bind distinct targets. Neuronal signaling
proteins: EphrinB1, EphrinB2, and Disabled-1 (Dab-1) all
bind to Nck-2 exclusively. And in the case of PDGFR,
Tyr(P)751 binds to Nck1 while Tyr(P)1009 binds to Nck2.
Nck1 and Nck2 have a role in the infection process of
enteropathogenic Escherichia coli (EPEC). Their SH3
domains are involved in recruiting and activating the
N-WASP/Arp2/3 complex inducing actin polymerization
resulting in the production of pedestals, dynamic
bacteria-presenting protrusions of the plasma membrane.
A similar thing occurs in the vaccinia virus where
motile plasma membrane projections are formed beneath
the virus. Recently it has been shown that the SH2
domains of both Nck1 and Nck2 bind the G-protein coupled
receptor kinase-interacting protein 1 (GIT1) in a
phosphorylation-dependent manner. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 98
Score = 65.4 bits (159), Expect = 4e-13
Identities = 31/83 (37%), Positives = 51/83 (61%)
Query: 660 KEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLY 719
KEWY+ TR QAE L +G FL+R SE+ S + +S +A K KH ++++ +Y
Sbjct: 1 KEWYYGNVTRHQAECALNERGVEGDFLIRDSESSPSDFSVSLKAVGKNKHFKVQLVDNVY 60
Query: 720 TIGTTQFESLVELISYYERHPLY 742
IG +F S+ EL+ +Y++ P++
Sbjct: 61 CIGQRRFNSMDELVEHYKKAPIF 83
Score = 37.3 bits (86), Expect = 0.004
Identities = 24/83 (28%), Positives = 44/83 (53%), Gaps = 7/83 (8%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W++G ++ R +AE L GD FL+R+SE+ D+S+S G+ H +++
Sbjct: 3 WYYGNVT--RHQAECALNERGVEGD--FLIRDSESSPSDFSVSLKAVGKNKHFKVQLVDN 58
Query: 563 SGQFYLVEKSYFDSLYSLISHYR 585
Y + + F+S+ L+ HY+
Sbjct: 59 V---YCIGQRRFNSMDELVEHYK 78
Score = 32.3 bits (73), Expect = 0.20
Identities = 13/40 (32%), Positives = 26/40 (65%)
Query: 432 AEDKIKHCRIRVEGRLYTIGTTQFESLVELISYYERHPLY 471
A K KH ++++ +Y IG +F S+ EL+ +Y++ P++
Sbjct: 44 AVGKNKHFKVQLVDNVYCIGQRRFNSMDELVEHYKKAPIF 83
>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 = 63.4 bits (155), Expect = 7e-13
Identities = 22/47 (46%), Positives = 28/47 (59%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPS 834
ALYDY AR DELSF K II + +++ GWW+G G + PS
Sbjct: 1 VALYDYTAREPDELSFKKGDIIIVLEKSDDGWWKGRLKGGKEGLIPS 47
>gnl|CDD|198183 cd09929, SH2_BLNK_SLP-76, Src homology 2 (SH2) domain found in
B-cell linker (BLNK) protein and SH2 domain-containing
leukocyte protein of 76 kDa (SLP-76). BLNK (also known
as SLP-65 or BASH) is an important adaptor protein
expressed in B-lineage cells. BLNK consists of a
N-terminal sterile alpha motif (SAM) domain and a
C-terminal SH2 domain. BLNK is a cytoplasmic protein,
but a part of it is bound to the plasma membrane through
an N-terminal leucine zipper motif and transiently bound
to a cytoplasmic domain of Iga through its C-terminal
SH2 domain upon B cell antigen receptor
(BCR)-stimulation. A non-ITAM phosphotyrosine in Iga is
necessary for the binding with the BLNK SH2 domain
and/or for normal BLNK function in signaling and B cell
activation. Upon phosphorylation BLNK binds Btk and
PLCgamma2 through their SH2 domains and mediates
PLCgamma2 activation by Btk. BLNK also binds other
signaling molecules such as Vav, Grb2, Syk, and HPK1.
BLNK has been shown to be necessary for BCR-mediated
Ca2+ mobilization, for the activation of
mitogen-activated protein kinases such as ERK, JNK, and
p38 in a chicken B cell line DT40, and for activation of
transcription factors such as NF-AT and NF-kappaB in
human or mouse B cells. BLNK is involved in B cell
development, B cell survival, activation, proliferation,
and T-independent immune responses. BLNK is structurally
homologous to SLP-76. SLP-76 and (linker for activation
of T cells) LAT are adaptor/linker proteins in T cell
antigen receptor activation and T cell development. BLNK
interacts with many downstream signaling proteins that
interact directly with both SLP-76 and LAT. New data
suggest functional complementation of SLP-76 and LAT in
T cell antigen receptor function with BLNK in BCR
function. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 121
Score = 63.9 bits (156), Expect = 3e-12
Identities = 34/92 (36%), Positives = 48/92 (52%), Gaps = 9/92 (9%)
Query: 659 DKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSS--YVISFRAEDKIKHCRIRV-- 714
KEWY R +AE+ LRR DG FLVR S +SS Y + DK+ + +IR
Sbjct: 10 PKEWYAGNIDRKEAEEALRRSNKDGTFLVRDSSGKDSSQPYTLMVLYNDKVYNIQIRFLE 69
Query: 715 EGRLYTIGT-----TQFESLVELISYYERHPL 741
R Y +GT F S+ E+I ++++ PL
Sbjct: 70 NTRQYALGTGLRGEETFSSVAEIIEHHQKTPL 101
Score = 41.9 bits (99), Expect = 1e-04
Identities = 29/93 (31%), Positives = 46/93 (49%), Gaps = 10/93 (10%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGD--YSLSFWWQGRVNHCRIRSK 560
W+ G + R EAE+ LRR + DGTFLVR+S Y+L + +V + +IR
Sbjct: 13 WYAGNID--RKEAEEALRRSNK--DGTFLVRDSSGKDSSQPYTLMVLYNDKVYNIQIRFL 68
Query: 561 PESGQFYLVE----KSYFDSLYSLISHYRTNHL 589
+ Q+ L + F S+ +I H++ L
Sbjct: 69 ENTRQYALGTGLRGEETFSSVAEIIEHHQKTPL 101
>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 = 61.8 bits (150), Expect = 3e-12
Identities = 25/54 (46%), Positives = 31/54 (57%), Gaps = 1/54 (1%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
KALYDY A D+ELSF ++ I N+ + WW G+ G R FPSNYV
Sbjct: 1 WAKALYDYDAAEDNELSFFENDKIINIEFVDDDWWLGECHGSR-GLFPSNYVEL 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 = 61.3 bits (149), Expect = 4e-12
Identities = 28/53 (52%), Positives = 34/53 (64%), Gaps = 1/53 (1%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVA 838
T ALYDYQA +DDE+SF II+N+ + GWWRG GK FP+NYV
Sbjct: 1 TAVALYDYQAADDDEISFDPDDIITNIEMIDEGWWRGVCRGK-YGLFPANYVE 52
>gnl|CDD|198200 cd10337, SH2_BCAR3, Src homology 2 (SH2) domain in the Breast
Cancer Anti-estrogen Resistance protein 3. BCAR3 is
part of a growing family of guanine nucleotide exchange
factors is responsible for activation of Ras-family
GTPases, including Sos1 and 2, GRF1 and 2,
CalDAG-GEF/GRP1-4, C3G, cAMP-GEF/Epac 1 and 2, PDZ-GEFs,
MR-GEF, RalGDS family members, RalGPS, RasGEF, Smg GDS,
and phospholipase C(epsilon). 12102558 21262352 BCAR3
binds to the carboxy-terminus of BCAR1/p130Cas, a focal
adhesion adapter protein. Over expression of BCAR1
(p130Cas) and BCAR3 induces estrogen independent growth
in normally estrogen-dependent cell lines. They have
been linked to resistance to anti-estrogens in breast
cancer, Rac activation, and cell motility, though the
BCAR3/p130Cas complex is not required for this activity
in BCAR3. Many BCAR3-mediated signaling events in
epithelial and mesenchymal cells are independent of
p130Cas association. Structurally these proteins contain
a single SH2 domain upstream of their RasGEF domain,
which is responsible for the ability of BCAR3 to enhance
p130Cas over-expression-induced migration. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 136
Score = 63.1 bits (154), Expect = 8e-12
Identities = 32/91 (35%), Positives = 47/91 (51%), Gaps = 13/91 (14%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNH---CRIRS 559
W+HGR+ R AE L++R +G FLVR+S + GDY L+ W+G+ H R+
Sbjct: 8 WYHGRIP--RQVAESLVQR-----EGDFLVRDSLSSPGDYVLTCRWKGQPLHFKINRVVL 60
Query: 560 KPESGQ---FYLVEKSYFDSLYSLISHYRTN 587
+P Y E FDS+ +L+ Y N
Sbjct: 61 RPSEAYTRVQYQFEDEQFDSIPALVHFYVGN 91
Score = 47.3 bits (113), Expect = 2e-06
Identities = 27/87 (31%), Positives = 41/87 (47%), Gaps = 12/87 (13%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI-RV------ 714
WYH R AE L++R +G FLVR S + YV++ R + + H +I RV
Sbjct: 8 WYHGRIPRQVAESLVQR---EGDFLVRDSLSSPGDYVLTCRWKGQPLHFKINRVVLRPSE 64
Query: 715 --EGRLYTIGTTQFESLVELISYYERH 739
Y QF+S+ L+ +Y +
Sbjct: 65 AYTRVQYQFEDEQFDSIPALVHFYVGN 91
Score = 35.0 bits (81), Expect = 0.046
Identities = 14/29 (48%), Positives = 17/29 (58%), Gaps = 3/29 (10%)
Query: 613 WYHPTATRSQAEDLLRRVPSDGAFLVRPS 641
WYH R AE L++R +G FLVR S
Sbjct: 8 WYHGRIPRQVAESLVQR---EGDFLVRDS 33
>gnl|CDD|198198 cd09945, SH2_SHB_SHD_SHE_SHF_like, Src homology 2 domain found in
SH2 domain-containing adapter proteins B, D, E, and F
(SHB, SHD, SHE, SHF). SHB, SHD, SHE, and SHF are SH2
domain-containing proteins that play various roles
throughout the cell. SHB functions in generating
signaling compounds in response to tyrosine kinase
activation. SHB contains proline-rich motifs, a
phosphotyrosine binding (PTB) domain, tyrosine
phosphorylation sites, and a SH2 domain. SHB mediates
certain aspects of platelet-derived growth factor (PDGF)
receptor-, fibroblast growth factor (FGF) receptor-,
neural growth factor (NGF) receptor TRKA-, T cell
receptor-, interleukin-2 (IL-2) receptor- and focal
adhesion kinase- (FAK) signaling. SRC-like FYN-Related
Kinase FRK/RAK (also named BSK/IYK or GTK) and SHB
regulate apoptosis, proliferation and differentiation.
SHB promotes apoptosis and is also required for proper
mitogenicity, spreading and tubular morphogenesis in
endothelial cells. SHB also plays a role in preventing
early cavitation of embryoid bodies and reduces
differentiation to cells expressing albumin, amylase,
insulin and glucagon. SHB is a multifunctional protein
that has difference responses in different cells under
various conditions. SHE is expressed in heart, lung,
brain, and skeletal muscle, while expression of SHD is
restricted to the brain. SHF is mainly expressed in
skeletal muscle, brain, liver, prostate, testis, ovary,
small intestine, and colon. SHD may be a physiological
substrate of c-Abl and may function as an adapter
protein in the central nervous system. It is also
thought to be involved in apoptotic regulation. SHD
contains five YXXP motifs, a substrate sequence
preferred by Abl tyrosine kinases, in addition to a
poly-proline rich region and a C-terminal SH2 domain.
SHE contains two pTry protein binding domains, protein
interaction domain (PID) and a SH2 domain, followed by a
glycine-proline rich region, all of which are N-terminal
to the phosphotyrosine binding (PTB) domain. SHF
contains four putative tyrosine phosphorylation sites
and an SH2 domain. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 98
Score = 61.7 bits (150), Expect = 9e-12
Identities = 41/103 (39%), Positives = 57/103 (55%), Gaps = 10/103 (9%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W+HG ++ R EAE LLR +G++LVR SE+ DYSLS H RI + E
Sbjct: 3 WYHGAIT--RIEAESLLRPCK---EGSYLVRNSESTKQDYSLSLKSAKGFMHMRI-QRNE 56
Query: 563 SGQFYLVEKSY-FDSLYSLISHYRTNHL--RSQEFLITLQEPV 602
+GQ+ L + S F+++ +I HY N L R E + L EPV
Sbjct: 57 TGQYILGQFSRPFETIPEMIRHYCLNKLPVRGAEHM-CLLEPV 98
Score = 57.8 bits (140), Expect = 2e-10
Identities = 34/97 (35%), Positives = 50/97 (51%), Gaps = 8/97 (8%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI-RVEGRLYT 720
WYH TR +AE LLR +G++LVR SE+ Y +S ++ H RI R E Y
Sbjct: 3 WYHGAITRIEAESLLR-PCKEGSYLVRNSESTKQDYSLSLKSAKGFMHMRIQRNETGQYI 61
Query: 721 IGTTQ--FESLVELISYYERHPLYKK----IELWYPV 751
+G FE++ E+I +Y + L + + L PV
Sbjct: 62 LGQFSRPFETIPEMIRHYCLNKLPVRGAEHMCLLEPV 98
Score = 40.1 bits (94), Expect = 4e-04
Identities = 17/36 (47%), Positives = 22/36 (61%), Gaps = 1/36 (2%)
Query: 613 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSY 648
WYH TR +AE LL R +G++LVR SE+ Y
Sbjct: 3 WYHGAITRIEAESLL-RPCKEGSYLVRNSESTKQDY 37
>gnl|CDD|199831 cd10369, SH2_Src_Frk, Src homology 2 (SH2) domain found in the
Fyn-related kinase (Frk). Frk is a member of the Src
non-receptor type tyrosine kinase family of proteins.
The Frk subfamily is composed of Frk/Rak and
Iyk/Bsk/Gst. It is expressed primarily epithelial cells.
Frk is a nuclear protein and may function during G1 and
S phase of the cell cycle and suppress growth. Unlike
the other Src members it lacks a glycine at position 2
of SH4 which is important for addition of a myristic
acid moiety that is involved in targeting Src PTKs to
cellular membranes. FRK and SHB exert similar effects
when overexpressed in rat phaeochromocytoma (PC12) and
beta-cells, where both induce PC12 cell differentiation
and beta-cell proliferation. Under conditions that cause
beta-cell degeneration these proteins augment beta-cell
apoptosis. The FRK-SHB responses involve FAK and insulin
receptor substrates (IRS) -1 and -2. Frk has been
demonstrated to interact with retinoblastoma protein.
Frk regulates PTEN protein stability by phosphorylating
PTEN, which in turn prevents PTEN degradation. Frk also
plays a role in regulation of embryonal pancreatic beta
cell formation. Frk has a unique N-terminal domain, an
SH3 domain, an SH2 domain, a kinase domain and a
regulatory tail, as do the other members of the family.
Like the other members of the Src family the SH2 domain
in addition to binding the target, also plays an
autoinhibitory role by binding to its activation loop.
The tryosine involved is at the same site as the
tyrosine involved in the autophosphorylation of Src. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 96
Score = 61.0 bits (148), Expect = 2e-11
Identities = 35/87 (40%), Positives = 49/87 (56%), Gaps = 4/87 (4%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSK 560
E WF G + RA+AE L YS G FL+RESE+ G++SLS G V H RIR +
Sbjct: 3 EPWFFGAI--KRADAEKQLL-YSENQTGAFLIRESESQKGEFSLSVLDGGVVKHYRIR-R 58
Query: 561 PESGQFYLVEKSYFDSLYSLISHYRTN 587
+ G F+L + F +L +++Y T
Sbjct: 59 LDEGGFFLTRRKTFSTLNEFVNYYTTT 85
Score = 46.4 bits (110), Expect = 2e-06
Identities = 26/82 (31%), Positives = 39/82 (47%), Gaps = 3/82 (3%)
Query: 658 EDKEWYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRV-- 714
+ + W+ R+ AE LL GAFL+R SE+ + +S +KH RIR
Sbjct: 1 QAEPWFFGAIKRADAEKQLLYSENQTGAFLIRESESQKGEFSLSVLDGGVVKHYRIRRLD 60
Query: 715 EGRLYTIGTTQFESLVELISYY 736
EG + F +L E ++YY
Sbjct: 61 EGGFFLTRRKTFSTLNEFVNYY 82
>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 = 59.6 bits (145), Expect = 2e-11
Identities = 21/49 (42%), Positives = 33/49 (67%), Gaps = 1/49 (2%)
Query: 791 YDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
++Y+A+ +DELS K + + ++ GWWRG+ G ++ WFPSNYV E
Sbjct: 6 FNYEAQREDELSLRKGDRVLVLEKSSDGWWRGECNG-QVGWFPSNYVTE 53
>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 = 59.3 bits (144), Expect = 2e-11
Identities = 23/52 (44%), Positives = 32/52 (61%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ALYDYQA +D E+SF II+++ + + GWWRG FP+NYV
Sbjct: 1 RARALYDYQAADDTEISFDPGDIITDIEQIDEGWWRGTGPDGTYGLFPANYV 52
>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 = 59.3 bits (143), Expect = 2e-11
Identities = 28/54 (51%), Positives = 35/54 (64%), Gaps = 1/54 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAEI 840
V+A +++Q N+DELSF K +I EGGWW G + G R WFPSNYV EI
Sbjct: 2 VRAKFNFQQTNEDELSFSKGDVIHVTRVEEGGWWEGTHNG-RTGWFPSNYVREI 54
>gnl|CDD|198218 cd10355, SH2_DAPP1_BAM32_like, Src homology 2 domain found in dual
adaptor for phosphotyrosine and 3-phosphoinositides (
DAPP1)/B lymphocyte adaptor molecule of 32 kDa
(Bam32)-like proteins. DAPP1/Bam32 contains a putative
myristoylation site at its N-terminus, followed by a SH2
domain, and a pleckstrin homology (PH) domain at its
C-terminus. DAPP1 could potentially be recruited to the
cell membrane by any of these domains. Its putative
myristoylation site could facilitate the interaction of
DAPP1 with the lipid bilayer. Its SH2 domain may also
interact with phosphotyrosine residues on
membrane-associated proteins such as activated tyrosine
kinase receptors. And finally its PH domain exhibits a
high-affinity interaction with the PtdIns(3,4,5)P(3)
PtdIns(3,4)P(2) second messengers produced at the cell
membrane following the activation of PI 3-kinases. DAPP1
is thought to interact with both tyrosine phosphorylated
proteins and 3-phosphoinositides and therefore may play
a role in regulating the location and/or activity of
such proteins(s) in response to agonists that elevate
PtdIns(3,4,5)P(3) and PtdIns(3,4)P(2). This protein is
likely to play an important role in triggering signal
transduction pathways that lie downstream from receptor
tyrosine kinases and PI 3-kinase. It is likely that
DAPP1 functions as an adaptor to recruit other proteins
to the plasma membrane in response to extracellular
signals. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 92
Score = 60.2 bits (146), Expect = 3e-11
Identities = 27/80 (33%), Positives = 41/80 (51%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLYTI 721
WYH TR AE LL DG++L+R S + +S RA+D +KH + G +
Sbjct: 8 WYHGNLTRHAAEALLLSNGVDGSYLLRNSNEGTGLFSLSVRAKDSVKHFHVEYTGYSFKF 67
Query: 722 GTTQFESLVELISYYERHPL 741
G +F SL + + ++ PL
Sbjct: 68 GFNEFSSLQDFVKHFANQPL 87
Score = 39.8 bits (93), Expect = 5e-04
Identities = 28/82 (34%), Positives = 40/82 (48%), Gaps = 7/82 (8%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W+HG L+ R AE LL S+ DG++L+R S G +SLS + V H +
Sbjct: 8 WYHGNLT--RHAAEALL--LSNGVDGSYLLRNSNEGTGLFSLSVRAKDSVKHFHVEYTGY 63
Query: 563 SGQFYLVEKSYFDSLYSLISHY 584
S +F E F SL + H+
Sbjct: 64 SFKFGFNE---FSSLQDFVKHF 82
Score = 29.4 bits (66), Expect = 2.3
Identities = 11/39 (28%), Positives = 20/39 (51%)
Query: 432 AEDKIKHCRIRVEGRLYTIGTTQFESLVELISYYERHPL 470
A+D +KH + G + G +F SL + + ++ PL
Sbjct: 49 AKDSVKHFHVEYTGYSFKFGFNEFSSLQDFVKHFANQPL 87
>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 = 58.9 bits (143), Expect = 3e-11
Identities = 26/57 (45%), Positives = 38/57 (66%), Gaps = 5/57 (8%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEG----GWWRGDYGGKRMHWFPSNYVAE 839
V+ALYDY+A++D+ELSFP+ AII + + + GWW G++ G+ FPS V E
Sbjct: 2 VRALYDYEAQSDEELSFPEGAIIRILRKDDNGVDDGWWEGEFNGRV-GVFPSLVVEE 57
>gnl|CDD|198216 cd10353, SH2_Nterm_RasGAP, N-terminal Src homology 2 (SH2) domain
found in Ras GTPase-activating protein 1 (GAP). RasGAP
is part of the GAP1 family of GTPase-activating
proteins. The protein is located in the cytoplasm and
stimulates the GTPase activity of normal RAS p21, but
not its oncogenic counterpart. Acting as a suppressor of
RAS function, the protein enhances the weak intrinsic
GTPase activity of RAS proteins resulting in RAS
inactivation, thereby allowing control of cellular
proliferation and differentiation. Mutations leading to
changes in the binding sites of either protein are
associated with basal cell carcinomas. Alternative
splicing results in two isoforms. The shorter isoform
which lacks the N-terminal hydrophobic region, has the
same activity, and is expressed in placental tissues. In
general the longer isoform contains 2 SH2 domains, a SH3
domain, a pleckstrin homology (PH) domain, and a
calcium-dependent phospholipid-binding C2 domain. The
C-terminus contains the catalytic domain of RasGap which
catalyzes the activation of Ras by hydrolyzing GTP-bound
active Ras into an inactive GDP-bound form of Ras. This
model contains the N-terminal SH2 domain. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 103
Score = 60.2 bits (146), Expect = 4e-11
Identities = 29/76 (38%), Positives = 43/76 (56%)
Query: 661 EWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLYT 720
+WYH R+ AE+ LR+ G++L+R S+ S+V+SF + + H RI Y
Sbjct: 20 QWYHGRLDRTIAEERLRQAGKLGSYLIRESDRRPGSFVLSFLSRTGVNHFRIIAMCGDYY 79
Query: 721 IGTTQFESLVELISYY 736
IG +F SL +LI YY
Sbjct: 80 IGGRRFSSLSDLIGYY 95
Score = 53.3 bits (128), Expect = 1e-08
Identities = 33/83 (39%), Positives = 48/83 (57%), Gaps = 7/83 (8%)
Query: 502 KWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKP 561
+W+HGRL R AE+ LR+ LG ++L+RES+ G + LSF + VNH RI +
Sbjct: 20 QWYHGRLD--RTIAEERLRQAGKLG--SYLIRESDRRPGSFVLSFLSRTGVNHFRIIAM- 74
Query: 562 ESGQFYLVEKSYFDSLYSLISHY 584
G +Y+ + F SL LI +Y
Sbjct: 75 -CGDYYIGGRR-FSSLSDLIGYY 95
Score = 27.9 bits (62), Expect = 7.7
Identities = 14/35 (40%), Positives = 18/35 (51%)
Query: 431 LAEDKIKHCRIRVEGRLYTIGTTQFESLVELISYY 465
L+ + H RI Y IG +F SL +LI YY
Sbjct: 61 LSRTGVNHFRIIAMCGDYYIGGRRFSSLSDLIGYY 95
>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 = 58.5 bits (142), Expect = 4e-11
Identities = 23/52 (44%), Positives = 32/52 (61%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
KALYDYQA D+E+SF + II+ + + + GWW G + FP+NYV
Sbjct: 1 RAKALYDYQAAEDNEISFVEGDIITQIEQIDEGWWLGVNAKGQKGLFPANYV 52
>gnl|CDD|198230 cd10367, SH2_Src_Fgr, Src homology 2 (SH2) domain found in
Gardner-Rasheed feline sarcoma viral (v-fgr) oncogene
homolog, Fgr. Fgr is a member of the Src non-receptor
type tyrosine kinase family of proteins. The protein
contains N-terminal sites for myristoylation and
palmitoylation, a PTK domain, and SH2 and SH3 domains
which are involved in mediating protein-protein
interactions with phosphotyrosine-containing and
proline-rich motifs, respectively. Fgr is expressed in
B-cells and myeloid cells, localizes to plasma membrane
ruffles, and functions as a negative regulator of cell
migration and adhesion triggered by the beta-2 integrin
signal transduction pathway. Multiple alternatively
spliced variants, encoding the same protein, have been
identified Fgr has been shown to interact with
Wiskott-Aldrich syndrome protein. Fgr has a unique
N-terminal domain, an SH3 domain, an SH2 domain, a
kinase domain and a regulatory tail, as do the other
members of the family. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 59.9 bits (145), Expect = 5e-11
Identities = 36/89 (40%), Positives = 53/89 (59%), Gaps = 9/89 (10%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSF--WWQGR---VNHC 555
E+W+ G++ GR +AE L + G FL+RESET G YSLS W Q R V H
Sbjct: 3 EEWYFGKI--GRKDAERQLLSPGN-PRGAFLIRESETTKGAYSLSIRDWDQNRGDHVKHY 59
Query: 556 RIRSKPESGQFYLVEKSYFDSLYSLISHY 584
+IR K ++G +Y+ ++ FD++ L+ HY
Sbjct: 60 KIR-KLDTGGYYITTRAQFDTVQELVQHY 87
Score = 45.7 bits (108), Expect = 4e-06
Identities = 30/85 (35%), Positives = 41/85 (48%), Gaps = 8/85 (9%)
Query: 660 KEWYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNSSYVISFR-----AEDKIKHCRIR 713
+EWY R AE LL GAFL+R SE +Y +S R D +KH +IR
Sbjct: 3 EEWYFGKIGRKDAERQLLSPGNPRGAFLIRESETTKGAYSLSIRDWDQNRGDHVKHYKIR 62
Query: 714 V--EGRLYTIGTTQFESLVELISYY 736
G Y QF+++ EL+ +Y
Sbjct: 63 KLDTGGYYITTRAQFDTVQELVQHY 87
Score = 28.3 bits (63), Expect = 5.3
Identities = 16/39 (41%), Positives = 19/39 (48%), Gaps = 1/39 (2%)
Query: 611 KEWYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNSSY 648
+EWY R AE LL GAFL+R SE +Y
Sbjct: 3 EEWYFGKIGRKDAERQLLSPGNPRGAFLIRESETTKGAY 41
>gnl|CDD|198223 cd10360, SH2_Srm, Src homology 2 (SH2) domain found in Src-related
kinase lacking C-terminal regulatory tyrosine and
N-terminal myristoylation sites (srm). Srm is a
nonreceptor protein kinase that has two SH2 domains, a
SH3 domain, and a kinase domain with a tyrosine residue
for autophosphorylation. However it lacks an N-terminal
glycine for myristoylation and a C-terminal tyrosine
which suppresses kinase activity when phosphorylated.
Srm is most similar to members of the Tec family who
other members include: Tec, Btk/Emb, and Itk/Tsk/Emt.
However Srm differs in its N-terminal unique domain it
being much smaller than in the Tec family and is closer
to Src. Srm is thought to be a new family of nonreceptor
tyrosine kinases that may be redundant in function. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 79
Score = 58.8 bits (142), Expect = 6e-11
Identities = 33/78 (42%), Positives = 46/78 (58%), Gaps = 3/78 (3%)
Query: 662 WYHPTATRSQAEDLLRRVPSD-GAFLVRPSENDNSSYVISFRAEDKIKHCRIRV--EGRL 718
WY +R+QA+ LL P++ GAFL+RPSE+ Y +S RA+ K+ H RI + G L
Sbjct: 2 WYFSGISRTQAQQLLLSPPNEPGAFLIRPSESSLGGYSLSVRAQAKVCHYRICMAPSGSL 61
Query: 719 YTIGTTQFESLVELISYY 736
Y F L EL++YY
Sbjct: 62 YLQKGRLFPGLEELLAYY 79
Score = 52.7 bits (126), Expect = 9e-09
Identities = 30/82 (36%), Positives = 43/82 (52%), Gaps = 4/82 (4%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W+ +S R +A+ LL + G FL+R SE+ +G YSLS Q +V H RI
Sbjct: 2 WYFSGIS--RTQAQQLLLSPPN-EPGAFLIRPSESSLGGYSLSVRAQAKVCHYRI-CMAP 57
Query: 563 SGQFYLVEKSYFDSLYSLISHY 584
SG YL + F L L+++Y
Sbjct: 58 SGSLYLQKGRLFPGLEELLAYY 79
Score = 37.2 bits (86), Expect = 0.003
Identities = 17/37 (45%), Positives = 24/37 (64%), Gaps = 1/37 (2%)
Query: 613 WYHPTATRSQAEDLLRRVPSD-GAFLVRPSENDNSSY 648
WY +R+QA+ LL P++ GAFL+RPSE+ Y
Sbjct: 2 WYFSGISRTQAQQLLLSPPNEPGAFLIRPSESSLGGY 38
>gnl|CDD|198275 cd10412, SH2_SH2B3, Src homology 2 (SH2) domain found in SH2B
adapter proteins (SH2B1, SH2B2, SH2B3). SH2B3 (Lnk),
like other members of the SH2B adapter protein family,
contains a pleckstrin homology domain, at least one
dimerization domain, and a C-terminal SH2 domain which
binds to phosphorylated tyrosines in a variety of
tyrosine kinases. SH2B3 negatively regulates
lymphopoiesis and early hematopoiesis. The
lnk-deficiency results in enhanced production of B
cells, and expansion as well as enhanced function of
hematopoietic stem cells (HSCs), demonstrating negative
regulatory functions of Sh2b3/Lnk in cytokine signaling.
Sh2b3/Lnk also functions in responses controlled by cell
adhesion and in crosstalk between integrin- and
cytokine-mediated signaling. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 97
Score = 58.8 bits (142), Expect = 9e-11
Identities = 33/83 (39%), Positives = 49/83 (59%), Gaps = 4/83 (4%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
WFHG +S R +A L++ G FLVR+SET G+Y L+F +QGR H R+ S E
Sbjct: 10 WFHGPIS--RVKAAQLVQLQGPDAHGVFLVRQSETRRGEYVLTFNFQGRAKHLRL-SLTE 66
Query: 563 SGQFYLVEKSYFDSLYSLISHYR 585
GQ V+ +F S+ ++ H++
Sbjct: 67 RGQCR-VQHLHFPSVVDMLHHFQ 88
Score = 45.7 bits (108), Expect = 4e-06
Identities = 25/83 (30%), Positives = 45/83 (54%), Gaps = 3/83 (3%)
Query: 662 WYHPTATRSQAEDL--LRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGR-L 718
W+H +R +A L L+ + G FLVR SE YV++F + + KH R+ + R
Sbjct: 10 WFHGPISRVKAAQLVQLQGPDAHGVFLVRQSETRRGEYVLTFNFQGRAKHLRLSLTERGQ 69
Query: 719 YTIGTTQFESLVELISYYERHPL 741
+ F S+V+++ +++R P+
Sbjct: 70 CRVQHLHFPSVVDMLHHFQRSPI 92
>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 = 57.3 bits (138), Expect = 1e-10
Identities = 30/58 (51%), Positives = 38/58 (65%), Gaps = 3/58 (5%)
Query: 785 ITVKALYDYQARNDDELSFPKHAIISNVTRAE-GGWWRGDYGGKRMHWFPSNYVAEIE 841
+ VKA ++++ N+DELS K II VTR E GGWW G G + WFPSNYV EI+
Sbjct: 2 LVVKARFNFKQTNEDELSVCKGDIIY-VTRVEEGGWWEGTLNG-KTGWFPSNYVREIK 57
>gnl|CDD|198273 cd10410, SH2_SH2B1, Src homology 2 (SH2) domain found in SH2B
adapter proteins (SH2B1, SH2B2, SH2B3). SH2B1 (SH2-B,
PSM), like other members of the SH2B adapter protein
family, contains a pleckstrin homology domain, at least
one dimerization domain, and a C-terminal SH2 domain
which binds to phosphorylated tyrosines in a variety of
tyrosine kinases. SH2B1 and SH2B2 function in
signaling pathways found downstream of growth hormone
receptor and receptor tyrosine kinases, including the
insulin, insulin-like growth factor-I (IGF-I),
platelet-derived growth factor (PDGF), nerve growth
factor, hepatocyte growth factor, and fibroblast growth
factor receptors. SH2B2beta, a new isoform of SH2B2, is
an endogenous inhibitor of SH2B1 and/or SH2B2
(SH2B2alpha), negatively regulating insulin signaling
and/or JAK2-mediated cellular responses. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 97
Score = 58.5 bits (141), Expect = 1e-10
Identities = 35/88 (39%), Positives = 51/88 (57%), Gaps = 4/88 (4%)
Query: 500 GEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRS 559
G WFHG LS R +A L+ G FLVR+SET G+Y L+F +QG+ H R+ S
Sbjct: 7 GYPWFHGMLS--RLKAAQLVLEGGTGSHGVFLVRQSETRRGEYVLTFNFQGKAKHLRL-S 63
Query: 560 KPESGQFYLVEKSYFDSLYSLISHYRTN 587
E GQ V+ +F S++ ++ H+R +
Sbjct: 64 LNEEGQCR-VQHLWFQSIFDMLEHFRVH 90
Score = 46.5 bits (110), Expect = 2e-06
Identities = 26/85 (30%), Positives = 45/85 (52%), Gaps = 5/85 (5%)
Query: 661 EWYHPTATRSQAEDLLRR--VPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRV--EG 716
W+H +R +A L+ S G FLVR SE YV++F + K KH R+ + EG
Sbjct: 9 PWFHGMLSRLKAAQLVLEGGTGSHGVFLVRQSETRRGEYVLTFNFQGKAKHLRLSLNEEG 68
Query: 717 RLYTIGTTQFESLVELISYYERHPL 741
+ + F+S+ +++ ++ HP+
Sbjct: 69 QC-RVQHLWFQSIFDMLEHFRVHPI 92
Score = 27.7 bits (61), Expect = 9.3
Identities = 14/39 (35%), Positives = 18/39 (46%), Gaps = 2/39 (5%)
Query: 612 EWYHPTATRSQAEDLLRR--VPSDGAFLVRPSENDNSSY 648
W+H +R +A L+ S G FLVR SE Y
Sbjct: 9 PWFHGMLSRLKAAQLVLEGGTGSHGVFLVRQSETRRGEY 47
>gnl|CDD|150071 pfam09279, efhand_like, Phosphoinositide-specific phospholipase C,
efhand-like. Members of this family are predominantly
found in phosphoinositide-specific phospholipase C. They
adopt a structure consisting of a core of four alpha
helices, in an EF like fold, and are required for
functioning of the enzyme.
Length = 83
Score = 58.0 bits (141), Expect = 1e-10
Identities = 19/76 (25%), Positives = 38/76 (50%), Gaps = 1/76 (1%)
Query: 190 YSSDGQTVTASELTNFLIREQNETNVNEREVSRHMRDYLQDEQRNVQEPYFTFMEFIDFL 249
YSS+ +TA EL FL EQ + + E + + Y +E+ + + F +L
Sbjct: 9 YSSNKGVLTAEELRRFLNEEQKDPRLTEEQALAIIEKYEPNEE-AKKRGQLSLDGFTRYL 67
Query: 250 FSKQNELWDQQYDAIH 265
FS +N +++ ++ ++
Sbjct: 68 FSDENSIFNPEHLDVY 83
>gnl|CDD|198229 cd10366, SH2_Src_Yes, Src homology 2 (SH2) domain found in Yes.
Yes is a member of the Src non-receptor type tyrosine
kinase family of proteins. Yes is the cellular homolog
of the Yamaguchi sarcoma virus oncogene. In humans it is
encoded by the YES1 gene which maps to chromosome 18 and
is in close proximity to thymidylate synthase. A
corresponding Yes pseudogene has been found on
chromosome 22. YES1 has been shown to interact with
Janus kinase 2, CTNND1,RPL10, and Occludin. Yes1 has a
unique N-terminal domain, an SH3 domain, an SH2 domain,
a kinase domain and a regulatory tail, as do the other
members of the family. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 58.5 bits (141), Expect = 1e-10
Identities = 38/90 (42%), Positives = 54/90 (60%), Gaps = 9/90 (10%)
Query: 500 GEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSF--WWQGR---VNH 554
E+W+ G++ GR +AE LL + G FLVRESET G YSLS W + R V H
Sbjct: 2 AEEWYFGKM--GRKDAERLLLNPGN-QRGIFLVRESETTKGAYSLSIRDWDEVRGDNVKH 58
Query: 555 CRIRSKPESGQFYLVEKSYFDSLYSLISHY 584
+IR K ++G +Y+ ++ FD+L L+ HY
Sbjct: 59 YKIR-KLDNGGYYITTRAQFDTLQKLVKHY 87
Score = 46.6 bits (110), Expect = 2e-06
Identities = 32/89 (35%), Positives = 44/89 (49%), Gaps = 10/89 (11%)
Query: 660 KEWYHPTATRSQAEDLLRRVPSD--GAFLVRPSENDNSSYVISFRAEDKI-----KHCRI 712
+EWY R AE LL P + G FLVR SE +Y +S R D++ KH +I
Sbjct: 3 EEWYFGKMGRKDAERLLLN-PGNQRGIFLVRESETTKGAYSLSIRDWDEVRGDNVKHYKI 61
Query: 713 RV--EGRLYTIGTTQFESLVELISYYERH 739
R G Y QF++L +L+ +Y H
Sbjct: 62 RKLDNGGYYITTRAQFDTLQKLVKHYTEH 90
Score = 33.1 bits (75), Expect = 0.12
Identities = 21/79 (26%), Positives = 39/79 (49%), Gaps = 6/79 (7%)
Query: 392 ETVLPSPHQLRGKILLKHKKLPEGSDEQTPCAIAKDEGKLAEDKIKHCRIRV--EGRLYT 449
E +L +P RG L++ + +G+ + +D ++ D +KH +IR G Y
Sbjct: 16 ERLLLNPGNQRGIFLVRESETTKGAYSLS----IRDWDEVRGDNVKHYKIRKLDNGGYYI 71
Query: 450 IGTTQFESLVELISYYERH 468
QF++L +L+ +Y H
Sbjct: 72 TTRAQFDTLQKLVKHYTEH 90
>gnl|CDD|198281 cd10418, SH2_Src_Fyn_isoform_a_like, Src homology 2 (SH2) domain
found in Fyn isoform a like proteins. Fyn is a member
of the Src non-receptor type tyrosine kinase family of
proteins. This cd contains the SH2 domain found in Fyn
isoform a type proteins. Fyn is involved in the control
of cell growth and is required in the following
pathways: T and B cell receptor signaling,
integrin-mediated signaling, growth factor and cytokine
receptor signaling, platelet activation, ion channel
function, cell adhesion, axon guidance, fertilization,
entry into mitosis, and differentiation of natural
killer cells, oligodendrocytes and keratinocytes. The
protein associates with the p85 subunit of
phosphatidylinositol 3-kinase and interacts with the
Fyn-binding protein. Alternatively spliced transcript
variants encoding distinct isoforms exist. Fyn is
primarily localized to the cytoplasmic leaflet of the
plasma membrane. Tyrosine phosphorylation of target
proteins by Fyn serves to either regulate target protein
activity, and/or to generate a binding site on the
target protein that recruits other signaling molecules.
FYN has been shown to interact with a number of proteins
including: BCAR1, Cbl, Janus kinase, nephrin, Sky,
tyrosine kinase, Wiskott-Aldrich syndrome protein, and
Zap-70. Fyn has a unique N-terminal domain, an SH3
domain, an SH2 domain, a kinase domain and a regulatory
tail, as do the other members of the family. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 58.1 bits (140), Expect = 2e-10
Identities = 36/90 (40%), Positives = 54/90 (60%), Gaps = 9/90 (10%)
Query: 500 GEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSF--WWQGR---VNH 554
E+W+ G+L GR +AE L + + GTFL+RESET G YSLS W + V H
Sbjct: 2 AEEWYFGKL--GRKDAERQLLSFGN-PRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKH 58
Query: 555 CRIRSKPESGQFYLVEKSYFDSLYSLISHY 584
+IR K ++G +Y+ ++ F++L L+ HY
Sbjct: 59 YKIR-KLDNGGYYITTRAQFETLQQLVQHY 87
Score = 42.3 bits (99), Expect = 7e-05
Identities = 30/85 (35%), Positives = 40/85 (47%), Gaps = 8/85 (9%)
Query: 660 KEWYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNSSYVISFR-----AEDKIKHCRIR 713
+EWY R AE LL G FL+R SE +Y +S R D +KH +IR
Sbjct: 3 EEWYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIR 62
Query: 714 V--EGRLYTIGTTQFESLVELISYY 736
G Y QFE+L +L+ +Y
Sbjct: 63 KLDNGGYYITTRAQFETLQQLVQHY 87
>gnl|CDD|198179 cd09925, SH2_SHC, Src homology 2 (SH2) domain found in SH2 adaptor
protein C (SHC). SHC is involved in a wide variety of
pathways including regulating proliferation,
angiogenesis, invasion and metastasis, and bone
metabolism. An adapter protein, SHC has been implicated
in Ras activation following the stimulation of a number
of different receptors, including growth factors
[insulin, epidermal growth factor (EGF), nerve growth
factor, and platelet derived growth factor (PDGF)],
cytokines [interleukins 2, 3, and 5], erythropoietin,
and granulocyte/macrophage colony-stimulating factor,
and antigens [T-cell and B-cell receptors]. SHC has been
shown to bind to tyrosine-phosphorylated receptors, and
receptor stimulation leads to tyrosine phosphorylation
of SHC. Upon phosphorylation, SHC interacts with another
adapter protein, Grb2, which binds to the Ras GTP/GDP
exchange factor mSOS which leads to Ras activation. SHC
is composed of an N-terminal domain that interacts with
proteins containing phosphorylated tyrosines, a
(glycine/proline)-rich collagen-homology domain that
contains the phosphorylated binding site, and a
C-terminal SH2 domain. SH2 has been shown to interact
with the tyrosine-phosphorylated receptors of EGF and
PDGF and with the tyrosine-phosphorylated C chain of the
T-cell receptor, providing one of the mechanisms of
T-cell-mediated Ras activation. In general SH2 domains
are involved in signal transduction. They typically
bind pTyr-containing ligands via two surface pockets, a
pTyr and hydrophobic binding pocket, allowing proteins
with SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 104
Score = 57.7 bits (140), Expect = 3e-10
Identities = 39/115 (33%), Positives = 57/115 (49%), Gaps = 26/115 (22%)
Query: 500 GEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHC---- 555
GE W+HG++S R +AE LL+ DG FLVRES T G Y L+ G+ H
Sbjct: 6 GEPWYHGKMS--RRDAESLLQT-----DGDFLVRESTTTPGQYVLTGMQNGQPKHLLLVD 58
Query: 556 ---RIRSKPESGQFYLVEKSYFDSLYSLISHYRTNHL--RSQEFLITLQEPVPQP 605
+R+K F+S+ LI+++ TN L S+ + L+ PV +P
Sbjct: 59 PEGVVRTKDRV----------FESISHLINYHVTNGLPIISEGSELHLRRPVRRP 103
Score = 47.7 bits (114), Expect = 8e-07
Identities = 28/87 (32%), Positives = 40/87 (45%), Gaps = 17/87 (19%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHC-------RIRV 714
WYH +R AE LL+ DG FLVR S YV++ + KH +R
Sbjct: 9 WYHGKMSRRDAESLLQT---DGDFLVRESTTTPGQYVLTGMQNGQPKHLLLVDPEGVVRT 65
Query: 715 EGRLYTIGTTQFESLVELISYYERHPL 741
+ R+ FES+ LI+Y+ + L
Sbjct: 66 KDRV-------FESISHLINYHVTNGL 85
Score = 34.2 bits (79), Expect = 0.048
Identities = 16/36 (44%), Positives = 18/36 (50%), Gaps = 3/36 (8%)
Query: 613 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSY 648
WYH +R AE LL+ DG FLVR S Y
Sbjct: 9 WYHGKMSRRDAESLLQT---DGDFLVRESTTTPGQY 41
>gnl|CDD|198206 cd10343, SH2_SHIP, Src homology 2 (SH2) domain found in
SH2-containing inositol-5'-phosphatase (SHIP) and
SLAM-associated protein (SAP). The SH2-containing
inositol-5'-phosphatase, SHIP (also called
SHIP1/SHIP1a), is a hematopoietic-restricted
phosphatidylinositide phosphatase that translocates to
the plasma membrane after extracellular stimulation and
hydrolyzes the phosphatidylinositol-3-kinase
(PI3K)-generated second messenger PI-3,4,5-P3 (PIP3) to
PI-3,4-P2. As a result, SHIP dampens down PIP3 mediated
signaling and represses the proliferation,
differentiation, survival, activation, and migration of
hematopoietic cells. PIP3 recruits lipid-binding
pleckstrin homology(PH) domain-containing proteins to
the inner wall of the plasma membrane and activates
them. PH domain-containing downstream effectors include
the survival/proliferation enhancing serine/threonine
kinase, Akt (protein kinase B), the tyrosine kinase,
Btk, the regulator of protein translation, S6K, and the
Rac and cdc42 guanine nucleotide exchange factor, Vav.
SHIP is believed to act as a tumor suppressor during
leukemogenesis and lymphomagenesis, and may play a role
in activating the immune system to combat cancer. SHIP
contains an N-terminal SH2 domain, a centrally located
phosphatase domain that specifically hydrolyzes the
5'-phosphate from PIP3, PI-4,5-P2 and inositol-1,3,4,5-
tetrakisphosphate (IP4), a C2 domain, that is an
allosteric activating site when bound by SHIP's
enzymatic product, PI-3,4-P2; 2 NPXY motifs that bind
proteins with a phosphotyrosine binding (Shc, Dok 1, Dok
2) or an SH2 (p85a, SHIP2) domain; and a proline-rich
domain consisting of four PxxP motifs that bind a subset
of SH3-containing proteins including Grb2, Src, Lyn,
Hck, Abl, PLCg1, and PIAS1. The SH2 domain of SHIP binds
to the tyrosine phosphorylated forms of Shc, SHP-2,
Doks, Gabs, CD150, platelet-endothelial cell adhesion
molecule, Cas, c-Cbl, immunoreceptor tyrosine-based
inhibitory motifs (ITIMs), and immunoreceptor
tyrosine-based activation motifs (ITAMs). The X-linked
lymphoproliferative syndrome (XLP) gene encodes SAP
(also called SH2D1A/DSHP) a protein that consists of a 5
residue N-terminus, a single SH2 domain, and a short 25
residue C-terminal tail. XLP is characterized by an
extreme sensitivity to Epstein-Barr virus. Both T and
natural killer (NK) cell dysfunctions have been seen in
XLP patients. SAP binds the cytoplasmic tail of
Signaling lymphocytic activation molecule (SLAM), 2B4,
Ly-9, and CD84. SAP is believed to function as a
signaling inhibitor, by blocking or regulating binding
of other signaling proteins. SAP and the SAP-like
protein EAT-2 recognize the sequence motif TIpYXX(V/I),
which is found in the cytoplasmic domains of a
restricted number of T, B, and NK cell surface receptors
and are proposed to be natural inhibitors or regulators
of the physiological role of a small family of receptors
on the surface of these cells. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 57.5 bits (139), Expect = 3e-10
Identities = 33/98 (33%), Positives = 54/98 (55%), Gaps = 9/98 (9%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI--RVEGRLY 719
WYH TRS+AE+LL + DG+FLVR SE+ + +Y + ++ + RI E +L
Sbjct: 5 WYHGNITRSKAEELLSKAGKDGSFLVRDSESVSGAYALCVLYQNCVHTYRILPNAEDKL- 63
Query: 720 TIGTTQ------FESLVELISYYERHPLYKKIELWYPV 751
++ ++ F +L ELI +Y++ + L YPV
Sbjct: 64 SVQASEGVPVRFFTTLPELIEFYQKENMGLVTHLLYPV 101
Score = 56.3 bits (136), Expect = 8e-10
Identities = 36/109 (33%), Positives = 56/109 (51%), Gaps = 17/109 (15%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLG-DGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKP 561
W+HG ++ R++AE+LL S G DG+FLVR+SE+ G Y+L +Q V+ RI P
Sbjct: 5 WYHGNIT--RSKAEELL---SKAGKDGSFLVRDSESVSGAYALCVLYQNCVHTYRIL--P 57
Query: 562 ESGQFYLVEKS------YFDSLYSLISHYRTNHLRSQEFLITLQEPVPQ 604
+ V+ S +F +L LI Y+ + + L PV +
Sbjct: 58 NAEDKLSVQASEGVPVRFFTTLPELIEFYQK---ENMGLVTHLLYPVER 103
Score = 49.4 bits (118), Expect = 2e-07
Identities = 19/36 (52%), Positives = 26/36 (72%)
Query: 613 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSY 648
WYH TRS+AE+LL + DG+FLVR SE+ + +Y
Sbjct: 5 WYHGNITRSKAEELLSKAGKDGSFLVRDSESVSGAY 40
>gnl|CDD|198224 cd10361, SH2_Fps_family, Src homology 2 (SH2) domain found in
feline sarcoma, Fujinami poultry sarcoma, and
fes-related (Fes/Fps/Fer) proteins. The Fps family
consists of members Fps/Fes and Fer/Flk/Tyk3. They are
cytoplasmic protein-tyrosine kinases implicated in
signaling downstream from cytokines, growth factors and
immune receptors. Fes/Fps/Fer contains three
coiled-coil regions, an SH2 (Src-homology-2) and a TK
(tyrosine kinase catalytic) domain signature. Members
here include: Fps/Fes, Fer, Kin-31, and In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 90
Score = 57.2 bits (139), Expect = 3e-10
Identities = 32/95 (33%), Positives = 49/95 (51%), Gaps = 12/95 (12%)
Query: 498 HFGEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGD---YSLSFWWQGRVNH 554
E ++HG L R +AE+LL+ DG FLVR++E G LS W G++ H
Sbjct: 3 LENEPYYHGLLP--REDAEELLKN-----DGDFLVRKTEPKGGGKRKLVLSVRWDGKIRH 55
Query: 555 CRIRSKPESGQFYLVEKSYFDSLYSLISHYRTNHL 589
I + G++Y+ KS F S+ LI++Y+
Sbjct: 56 FVINRD-DGGKYYIEGKS-FKSISELINYYQKTKE 88
Score = 56.8 bits (138), Expect = 4e-10
Identities = 33/88 (37%), Positives = 48/88 (54%), Gaps = 7/88 (7%)
Query: 656 QHEDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSE---NDNSSYVISFRAEDKIKHCRI 712
E++ +YH R AE+LL+ DG FLVR +E V+S R + KI+H I
Sbjct: 2 DLENEPYYHGLLPREDAEELLKN---DGDFLVRKTEPKGGGKRKLVLSVRWDGKIRHFVI 58
Query: 713 -RVEGRLYTIGTTQFESLVELISYYERH 739
R +G Y I F+S+ ELI+YY++
Sbjct: 59 NRDDGGKYYIEGKSFKSISELINYYQKT 86
Score = 29.0 bits (66), Expect = 2.6
Identities = 15/35 (42%), Positives = 22/35 (62%), Gaps = 1/35 (2%)
Query: 435 KIKHCRI-RVEGRLYTIGTTQFESLVELISYYERH 468
KI+H I R +G Y I F+S+ ELI+YY++
Sbjct: 52 KIRHFVINRDDGGKYYIEGKSFKSISELINYYQKT 86
>gnl|CDD|198231 cd10368, SH2_Src_Fyn, Src homology 2 (SH2) domain found in Fyn.
Fyn is a member of the Src non-receptor type tyrosine
kinase family of proteins. Fyn is involved in the
control of cell growth and is required in the following
pathways: T and B cell receptor signaling,
integrin-mediated signaling, growth factor and cytokine
receptor signaling, platelet activation, ion channel
function, cell adhesion, axon guidance, fertilization,
entry into mitosis, and differentiation of natural
killer cells, oligodendrocytes and keratinocytes. The
protein associates with the p85 subunit of
phosphatidylinositol 3-kinase and interacts with the
Fyn-binding protein. Alternatively spliced transcript
variants encoding distinct isoforms exist. Fyn is
primarily localized to the cytoplasmic leaflet of the
plasma membrane. Tyrosine phosphorylation of target
proteins by Fyn serves to either regulate target protein
activity, and/or to generate a binding site on the
target protein that recruits other signaling molecules.
FYN has been shown to interact with a number of proteins
including: BCAR1, Cbl, Janus kinase, nephrin, Sky,
tyrosine kinase, Wiskott-Aldrich syndrome protein, and
Zap-70. Fyn has a unique N-terminal domain, an SH3
domain, an SH2 domain, a kinase domain and a regulatory
tail, as do the other members of the family. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 57.0 bits (137), Expect = 5e-10
Identities = 36/90 (40%), Positives = 53/90 (58%), Gaps = 9/90 (10%)
Query: 500 GEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFW-WQ----GRVNH 554
E+W+ G+L GR +AE L + + GTFL+RESET G YSLS W V H
Sbjct: 2 AEEWYFGKL--GRKDAERQLLSFGN-PRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKH 58
Query: 555 CRIRSKPESGQFYLVEKSYFDSLYSLISHY 584
+IR K ++G +Y+ ++ F++L L+ HY
Sbjct: 59 YKIR-KLDNGGYYITTRAQFETLQQLVQHY 87
Score = 43.9 bits (103), Expect = 2e-05
Identities = 30/85 (35%), Positives = 40/85 (47%), Gaps = 8/85 (9%)
Query: 660 KEWYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNSSYVISFR-----AEDKIKHCRIR 713
+EWY R AE LL G FL+R SE +Y +S R D +KH +IR
Sbjct: 3 EEWYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIR 62
Query: 714 V--EGRLYTIGTTQFESLVELISYY 736
G Y QFE+L +L+ +Y
Sbjct: 63 KLDNGGYYITTRAQFETLQQLVQHY 87
Score = 27.7 bits (61), Expect = 9.4
Identities = 18/66 (27%), Positives = 32/66 (48%), Gaps = 6/66 (9%)
Query: 402 RGKILLKHKKLPEGSDEQTPCAIAKDEGKLAEDKIKHCRIRV--EGRLYTIGTTQFESLV 459
RG L++ + +G+ + +D + D +KH +IR G Y QFE+L
Sbjct: 26 RGTFLIRESETTKGAYSLS----IRDWDDMKGDHVKHYKIRKLDNGGYYITTRAQFETLQ 81
Query: 460 ELISYY 465
+L+ +Y
Sbjct: 82 QLVQHY 87
>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 = 55.0 bits (132), Expect = 8e-10
Identities = 24/51 (47%), Positives = 35/51 (68%), Gaps = 1/51 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
V +YDY A+NDDEL+F K II+ + + + WW+G+ G+ + FPSNYV
Sbjct: 3 VIGMYDYTAQNDDELAFSKGQIINVLNKEDPDWWKGELNGQ-VGLFPSNYV 52
>gnl|CDD|198195 cd09942, SH2_nSH2_p85_like, N-terminal Src homology 2 (nSH2) domain
found in p85. Phosphoinositide 3-kinases (PI3Ks) are
essential for cell growth, migration, and survival.
p110, the catalytic subunit, is composed of an
adaptor-binding domain, a Ras-binding domain, a C2
domain, a helical domain, and a kinase domain. The
regulatory unit is called p85 and is composed of an SH3
domain, a RhoGap domain, a N-terminal SH2 (nSH2) domain,
an internal SH2 (iSH2) domain, and C-terminal (cSH2)
domain. There are 2 inhibitory interactions between
p110alpha and p85 of P13K: (1) p85 nSH2 domain with the
C2, helical, and kinase domains of p110alpha and (2) p85
iSH2 domain with C2 domain of p110alpha. There are 3
inhibitory interactions between p110beta and p85 of
P13K: (1) p85 nSH2 domain with the C2, helical, and
kinase domains of p110beta, (2) p85 iSH2 domain with C2
domain of p110alpha, and (3) p85 cSH2 domain with the
kinase domain of p110alpha. It is interesting to note
that p110beta is oncogenic as a wild type protein while
p110alpha lacks this ability. One explanation is the
idea that the regulation of p110beta by p85 is unique
because of the addition of inhibitory contacts from the
cSH2 domain and the loss of contacts in the iSH2 domain.
In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 110
Score = 56.6 bits (137), Expect = 9e-10
Identities = 33/105 (31%), Positives = 50/105 (47%), Gaps = 7/105 (6%)
Query: 654 PNQHEDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIR 713
P+ ++ EWY +R + + +R P DG FLVR + Y ++ R K +I
Sbjct: 1 PHSLQEAEWYWGDISREEVNEKMRDTP-DGTFLVRDASTMKGDYTLTLRKGGNNKLIKIF 59
Query: 714 VEGRLYTIGTT-QFESLVELISYYERHPL--YKK---IELWYPVS 752
Y F S+VELI+YY + L Y + ++L YPVS
Sbjct: 60 HRDGKYGFSDPLTFNSVVELINYYRNNSLAEYNRKLDVKLLYPVS 104
Score = 49.2 bits (118), Expect = 3e-07
Identities = 33/109 (30%), Positives = 56/109 (51%), Gaps = 9/109 (8%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W+ G +S R E + +R DGTFLVR++ T GDY+L+ G +I +
Sbjct: 9 WYWGDIS--REEVNEKMRDTP---DGTFLVRDASTMKGDYTLTLRKGGNNKLIKIFHR-- 61
Query: 563 SGQFYLVEKSYFDSLYSLISHYRTNHLR--SQEFLITLQEPVPQPNQHE 609
G++ + F+S+ LI++YR N L +++ + L PV + Q +
Sbjct: 62 DGKYGFSDPLTFNSVVELINYYRNNSLAEYNRKLDVKLLYPVSRFQQDQ 110
Score = 30.0 bits (68), Expect = 1.5
Identities = 15/33 (45%), Positives = 21/33 (63%), Gaps = 5/33 (15%)
Query: 454 QFESLVELISYYERHPL--YKK---IELWYPVS 481
F S+VELI+YY + L Y + ++L YPVS
Sbjct: 72 TFNSVVELINYYRNNSLAEYNRKLDVKLLYPVS 104
>gnl|CDD|198274 cd10411, SH2_SH2B2, Src homology 2 (SH2) domain found in SH2B
adapter proteins (SH2B1, SH2B2, SH2B3). SH2B2 (APS),
like other members of the SH2B adapter protein family,
contains a pleckstrin homology domain, at least one
dimerization domain, and a C-terminal SH2 domain which
binds to phosphorylated tyrosines in a variety of
tyrosine kinases. SH2B1 and SH2B2 function in signaling
pathways found downstream of growth hormone receptor and
receptor tyrosine kinases, including the insulin,
insulin-like growth factor-I (IGF-I), platelet-derived
growth factor (PDGF), nerve growth factor, hepatocyte
growth factor, and fibroblast growth factor receptors.
SH2B2beta, a new isoform of SH2B2, is an endogenous
inhibitor of SH2B1 and/or SH2B2 (SH2B2alpha), negatively
regulating insulin signaling and/or JAK2-mediated
cellular responses. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 97
Score = 56.2 bits (135), Expect = 1e-09
Identities = 31/85 (36%), Positives = 50/85 (58%), Gaps = 4/85 (4%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
WFHG LS R +A L+ G F++R+SET G+Y L+F +QG+ H R+ S
Sbjct: 10 WFHGTLS--RVKAAQLVLAGGPRSHGLFVIRQSETRPGEYVLTFNFQGKAKHLRL-SLNG 66
Query: 563 SGQFYLVEKSYFDSLYSLISHYRTN 587
GQ + V+ +F S++ ++ H+ T+
Sbjct: 67 HGQCH-VQHLWFQSVFDMLRHFHTH 90
Score = 43.1 bits (101), Expect = 4e-05
Identities = 25/86 (29%), Positives = 45/86 (52%), Gaps = 3/86 (3%)
Query: 659 DKEWYHPTATRSQAEDLLRR--VPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEG 716
D W+H T +R +A L+ S G F++R SE YV++F + K KH R+ + G
Sbjct: 7 DYPWFHGTLSRVKAAQLVLAGGPRSHGLFVIRQSETRPGEYVLTFNFQGKAKHLRLSLNG 66
Query: 717 RLYT-IGTTQFESLVELISYYERHPL 741
+ F+S+ +++ ++ HP+
Sbjct: 67 HGQCHVQHLWFQSVFDMLRHFHTHPI 92
>gnl|CDD|198282 cd10419, SH2_Src_Fyn_isoform_b_like, Src homology 2 (SH2) domain
found in Fyn isoform b like proteins. Fyn is a member
of the Src non-receptor type tyrosine kinase family of
proteins. This cd contains the SH2 domain found in Fyn
isoform b type proteins. Fyn is involved in the control
of cell growth and is required in the following
pathways: T and B cell receptor signaling,
integrin-mediated signaling, growth factor and cytokine
receptor signaling, platelet activation, ion channel
function, cell adhesion, axon guidance, fertilization,
entry into mitosis, and differentiation of natural
killer cells, oligodendrocytes and keratinocytes. The
protein associates with the p85 subunit of
phosphatidylinositol 3-kinase and interacts with the
Fyn-binding protein. Alternatively spliced transcript
variants encoding distinct isoforms exist. Fyn is
primarily localized to the cytoplasmic leaflet of the
plasma membrane. Tyrosine phosphorylation of target
proteins by Fyn serves to either regulate target protein
activity, and/or to generate a binding site on the
target protein that recruits other signaling molecules.
FYN has been shown to interact with a number of proteins
including: BCAR1, Cbl, Janus kinase, nephrin, Sky,
tyrosine kinase, Wiskott-Aldrich syndrome protein, and
Zap-70. Fyn has a unique N-terminal domain, an SH3
domain, an SH2 domain, a kinase domain and a regulatory
tail, as do the other members of the family. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 56.2 bits (135), Expect = 1e-09
Identities = 36/90 (40%), Positives = 53/90 (58%), Gaps = 9/90 (10%)
Query: 500 GEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFW-WQ----GRVNH 554
E+W+ G+L GR +AE L + + GTFL+RESET G YSLS W V H
Sbjct: 2 AEEWYFGKL--GRKDAERQLLSFGN-PRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKH 58
Query: 555 CRIRSKPESGQFYLVEKSYFDSLYSLISHY 584
+IR K ++G +Y+ ++ F++L L+ HY
Sbjct: 59 YKIR-KLDNGGYYITTRAQFETLQQLVQHY 87
Score = 42.4 bits (99), Expect = 6e-05
Identities = 30/85 (35%), Positives = 40/85 (47%), Gaps = 8/85 (9%)
Query: 660 KEWYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNSSYVISFR-----AEDKIKHCRIR 713
+EWY R AE LL G FL+R SE +Y +S R D +KH +IR
Sbjct: 3 EEWYFGKLGRKDAERQLLSFGNPRGTFLIRESETTKGAYSLSIRDWDDMKGDHVKHYKIR 62
Query: 714 V--EGRLYTIGTTQFESLVELISYY 736
G Y QFE+L +L+ +Y
Sbjct: 63 KLDNGGYYITTRAQFETLQQLVQHY 87
Score = 28.5 bits (63), Expect = 5.6
Identities = 18/66 (27%), Positives = 32/66 (48%), Gaps = 6/66 (9%)
Query: 402 RGKILLKHKKLPEGSDEQTPCAIAKDEGKLAEDKIKHCRIRV--EGRLYTIGTTQFESLV 459
RG L++ + +G+ + +D + D +KH +IR G Y QFE+L
Sbjct: 26 RGTFLIRESETTKGAYSLS----IRDWDDMKGDHVKHYKIRKLDNGGYYITTRAQFETLQ 81
Query: 460 ELISYY 465
+L+ +Y
Sbjct: 82 QLVQHY 87
>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 = 54.5 bits (131), Expect = 1e-09
Identities = 20/49 (40%), Positives = 33/49 (67%), Gaps = 1/49 (2%)
Query: 791 YDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
+DY+A+++DEL+ II+ + + +GGWW G+ G+R FP N+V E
Sbjct: 6 FDYKAQHEDELTITVGDIITKIKKDDGGWWEGEIKGRR-GLFPDNFVRE 53
>gnl|CDD|198197 cd09944, SH2_Grb7_family, Src homology 2 (SH2) domain found in the
growth factor receptor bound, subclass 7 (Grb7)
proteins. The Grb family binds to the epidermal growth
factor receptor (EGFR, erbB1) via their SH2 domains.
There are 3 members of the Grb7 family of proteins:
Grb7, Grb10, and Grb14. They are composed of an
N-terminal Proline-rich domain, a Ras Associating-like
(RA) domain, a Pleckstrin Homology (PH) domain, a
phosphotyrosine interaction region (PIR, BPS) and a
C-terminal SH2 domain. The SH2 domains of Grb7, Grb10
and Grb14 preferentially bind to a different RTK. Grb7
binds strongly to the erbB2 receptor, unlike Grb10 and
Grb14 which bind weakly to it. Grb14 binds to Fibroblast
Growth Factor Receptor (FGFR). Grb10 has been shown to
interact with many different proteins, including the
insulin and IGF1 receptors, platelet-derived growth
factor (PDGF) receptor-beta, Ret, Kit, Raf1 and MEK1,
and Nedd4. Grb7 family proteins are phosphorylated on
serine/threonine as well as tyrosine residues. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 108
Score = 56.3 bits (136), Expect = 1e-09
Identities = 30/88 (34%), Positives = 51/88 (57%), Gaps = 7/88 (7%)
Query: 657 HEDKEWYHPTATRSQAEDLLRRVPS-DGAFLVRPSENDNSSYVISFRAEDKIKHCRIRV- 714
H + W+H +R +A L+R+ DG FLVR S+++ ++V+S + KIKH +I
Sbjct: 2 HRSQPWFHGGISRDEAARLIRQQGLVDGVFLVRESQSNPGAFVLSLKHGQKIKHYQIIPI 61
Query: 715 --EGRLYTI---GTTQFESLVELISYYE 737
EG+ Y G T+F L++L+ +Y+
Sbjct: 62 EDEGQWYFTLDDGVTKFYDLLQLVEFYQ 89
Score = 54.0 bits (130), Expect = 6e-09
Identities = 32/94 (34%), Positives = 51/94 (54%), Gaps = 6/94 (6%)
Query: 497 LHFGEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCR 556
+H + WFHG +S R EA L+R+ L DG FLVRES++ G + LS ++ H +
Sbjct: 1 IHRSQPWFHGGIS--RDEAARLIRQQG-LVDGVFLVRESQSNPGAFVLSLKHGQKIKHYQ 57
Query: 557 IRSKPESGQ-FYLVEK--SYFDSLYSLISHYRTN 587
I + GQ ++ ++ + F L L+ Y+ N
Sbjct: 58 IIPIEDEGQWYFTLDDGVTKFYDLLQLVEFYQLN 91
>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 = 54.0 bits (130), Expect = 1e-09
Identities = 24/52 (46%), Positives = 28/52 (53%), Gaps = 1/52 (1%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
KALY Y A++ DELSF + II + GWW G GK FP NYV
Sbjct: 1 QCKALYAYDAQDTDELSFNEGDIIEILKEDPSGWWTGRLRGKE-GLFPGNYV 51
>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 = 54.1 bits (130), Expect = 1e-09
Identities = 24/53 (45%), Positives = 31/53 (58%), Gaps = 1/53 (1%)
Query: 785 ITVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
I ALYDYQ DDE+SF I+++ + GWW+G G R FP+NYV
Sbjct: 1 ICAVALYDYQGEGDDEISFDPQETITDIEMVDEGWWKGTCHGHR-GLFPANYV 52
>gnl|CDD|198261 cd10398, SH2_Tec_Txk, Src homology 2 (SH2) domain found in Tec
protein, Txk. A member of the Tec protein tyrosine
kinase Txk is expressed in thymus, spleen, lymph node, T
lymphocytes, NK cells, mast cell lines, and myeloid cell
line. Txk plays a role in TCR signal transduction, T
cell development, and selection which is analogous to
the function of Itk. Txk has been shown to interact with
IFN-gamma. Unlike most of the Tec family members Txk
lacks a PH domain. Instead Txk has a unique region
containing a palmitoylated cysteine string which has a
similar membrane tethering function as the PH domain.
Txk also has a zinc-binding motif, a SH3 domain, a SH2
domain, and a protein kinase catalytic domain. The TH
domain consists of a Zn2+-binding Btk motif and a
proline-rich region. The Btk motif is found in Tec
kinases, Ras GAP, and IGBP and crucial to the function
of the PH domain. It is not present in Txk which is not
surprising since it lacks a PH domain. The type 1 splice
form of the Drosophila homolog also lacks both the PH
domain and the Btk motif. The proline-rich regions are
highly conserved for the most part with the exception of
Bmx whose residues surrounding the PXXP motif are not
conserved (TH-like) and Btk29A which is entirely unique
with large numbers of glycine residues (TH-extended).
Tec family members all lack a C-terminal tyrosine having
an autoinhibitory function in its phosphorylated state.
In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 106
Score = 55.7 bits (134), Expect = 2e-09
Identities = 39/102 (38%), Positives = 53/102 (51%), Gaps = 9/102 (8%)
Query: 658 EDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDK------IKHCR 711
E EWYH TR+QAE LLR+ +GAF+VR S + SY IS + IKH +
Sbjct: 4 EIYEWYHKNITRNQAERLLRQESKEGAFIVRDSRH-LGSYTISVFTRARRSTEASIKHYQ 62
Query: 712 IRVE--GRLYTIGTTQFESLVELISYYERHPLYKKIELWYPV 751
I+ G+ Y F+S+ ELI Y++ + L YPV
Sbjct: 63 IKKNDSGQWYVAERHLFQSIPELIQYHQHNAAGLMSRLRYPV 104
Score = 44.9 bits (106), Expect = 9e-06
Identities = 30/92 (32%), Positives = 55/92 (59%), Gaps = 12/92 (13%)
Query: 502 KWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFW------WQGRVNHC 555
+W+H ++ R +AE LLR+ S +G F+VR+S +G Y++S + + + H
Sbjct: 7 EWYHKNIT--RNQAERLLRQESK--EGAFIVRDSRH-LGSYTISVFTRARRSTEASIKHY 61
Query: 556 RIRSKPESGQFYLVEKSYFDSLYSLISHYRTN 587
+I+ K +SGQ+Y+ E+ F S+ LI +++ N
Sbjct: 62 QIK-KNDSGQWYVAERHLFQSIPELIQYHQHN 92
Score = 41.9 bits (98), Expect = 1e-04
Identities = 20/38 (52%), Positives = 25/38 (65%)
Query: 609 EDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNS 646
E EWYH TR+QAE LLR+ +GAF+VR S + S
Sbjct: 4 EIYEWYHKNITRNQAERLLRQESKEGAFIVRDSRHLGS 41
>gnl|CDD|198184 cd09930, SH2_cSH2_p85_like, C-terminal Src homology 2 (cSH2) domain
found in p85. Phosphoinositide 3-kinases (PI3Ks) are
essential for cell growth, migration, and survival.
p110, the catalytic subunit, is composed of an
adaptor-binding domain, a Ras-binding domain, a C2
domain, a helical domain, and a kinase domain. The
regulatory unit is called p85 and is composed of an SH3
domain, a RhoGap domain, a N-terminal SH2 (nSH2) domain,
a inter SH2 (iSH2) domain, and C-terminal (cSH2) domain.
There are 2 inhibitory interactions between p110alpha
and p85 of P13K: 1) p85 nSH2 domain with the C2,
helical, and kinase domains of p110alpha and 2) p85 iSH2
domain with C2 domain of p110alpha. There are 3
inhibitory interactions between p110beta and p85 of
P13K: 1) p85 nSH2 domain with the C2, helical, and
kinase domains of p110beta, 2) p85 iSH2 domain with C2
domain of p110alpha, and 3) p85 cSH2 domain with the
kinase domain of p110alpha. It is interesting to note
that p110beta is oncogenic as a wild type protein while
p110alpha lacks this ability. One explanation is the
idea that the regulation of p110beta by p85 is unique
because of the addition of inhibitory contacts from the
cSH2 domain and the loss of contacts in the iSH2 domain.
In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 104
Score = 55.5 bits (134), Expect = 2e-09
Identities = 35/102 (34%), Positives = 48/102 (47%), Gaps = 9/102 (8%)
Query: 657 HEDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEG 716
H+++ W R+QAE+LLR P DG FL+R S Y S ++KHC I
Sbjct: 3 HDERTWLVGDINRTQAEELLRGKP-DGTFLIRESSTQG-CYACSVVCNGEVKHCVIYKTE 60
Query: 717 RLYTIGT--TQFESLVELISYY-----ERHPLYKKIELWYPV 751
Y +ESL EL+ +Y E+H + L YPV
Sbjct: 61 TGYGFAEPYNLYESLKELVLHYAHNSLEQHNDSLTVTLAYPV 102
Score = 54.0 bits (130), Expect = 6e-09
Identities = 41/108 (37%), Positives = 56/108 (51%), Gaps = 10/108 (9%)
Query: 498 HFGEK-WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCR 556
H E+ W G ++ R +AE+LLR DGTFL+RES T G Y+ S G V HC
Sbjct: 2 HHDERTWLVGDIN--RTQAEELLRGKP---DGTFLIRESST-QGCYACSVVCNGEVKHCV 55
Query: 557 IRSKPESGQFYLVEKSYFDSLYSLISHYRTNHL--RSQEFLITLQEPV 602
I K E+G + + ++SL L+ HY N L + +TL PV
Sbjct: 56 IY-KTETGYGFAEPYNLYESLKELVLHYAHNSLEQHNDSLTVTLAYPV 102
Score = 41.6 bits (98), Expect = 1e-04
Identities = 16/34 (47%), Positives = 22/34 (64%), Gaps = 1/34 (2%)
Query: 608 HEDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPS 641
H+++ W R+QAE+LLR P DG FL+R S
Sbjct: 3 HDERTWLVGDINRTQAEELLRGKP-DGTFLIRES 35
>gnl|CDD|198228 cd10365, SH2_Src_Src, Src homology 2 (SH2) domain found in tyrosine
kinase sarcoma (Src). Src is a member of the Src
non-receptor type tyrosine kinase family of proteins.
Src is thought to play a role in the regulation of
embryonic development and cell growth. Members here
include v-Src and c-Src. v-Src lacks the C-terminal
inhibitory phosphorylation site and is therefore
constitutively active as opposed to normal cellular src
(c-Src) which is only activated under certain
circumstances where it is required (e.g. growth factor
signaling). v-Src is an oncogene whereas c-Src is a
proto-oncogene. c-Src consists of three domains, an
N-terminal SH3 domain, a central SH2 domain and a
tyrosine kinase domain. The SH2 and SH3 domains work
together in the auto-inhibition of the kinase domain.
The phosphorylation of an inhibitory tyrosine near the
c-terminus of the protein produces a binding site for
the SH2 domain which then facilitates binding of the SH3
domain to a polyproline site within the linker between
the SH2 domain and the kinase domain. Binding of the SH3
domain inactivates the enzyme. This allows for multiple
mechanisms for c-Src activation: dephosphorylation of
the C-terminal tyrosine by a protein tyrosine
phosphatase, binding of the SH2 domain by a competitive
phospho-tyrosine residue, or competitive binding of a
polyproline binding site to the SH3 domain. Unlike most
other Src members Src lacks cysteine residues in the SH4
domain that undergo palmitylation. Serine and threonine
phosphorylation sites have also been identified in the
unique domains of Src and are believed to modulate
protein-protein interactions or regulate catalytic
activity. Alternatively spliced forms of Src, which
contain 6- or 11-amino acid insertions in the SH3
domain, are expressed in CNS neurons. c-Src has a unique
N-terminal domain, an SH3 domain, an SH2 domain, a
kinase domain and a regulatory tail, as do the other
members of the family. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 55.1 bits (132), Expect = 2e-09
Identities = 37/90 (41%), Positives = 54/90 (60%), Gaps = 9/90 (10%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFW----WQG-RVNHC 555
E+W+ G+++ R E+E LL + GTFLVRESET G Y LS +G V H
Sbjct: 3 EEWYFGKIT--RRESERLLLNAEN-PRGTFLVRESETTKGAYCLSVSDFDNAKGLNVKHY 59
Query: 556 RIRSKPESGQFYLVEKSYFDSLYSLISHYR 585
+IR K +SG FY+ ++ F+SL L+++Y
Sbjct: 60 KIR-KLDSGGFYITSRTQFNSLQQLVAYYS 88
Score = 52.7 bits (126), Expect = 2e-08
Identities = 33/88 (37%), Positives = 45/88 (51%), Gaps = 8/88 (9%)
Query: 660 KEWYHPTATRSQAEDLLRRVPSD-GAFLVRPSENDNSSYVISFRAED-----KIKHCRIR 713
+EWY TR ++E LL + G FLVR SE +Y +S D +KH +IR
Sbjct: 3 EEWYFGKITRRESERLLLNAENPRGTFLVRESETTKGAYCLSVSDFDNAKGLNVKHYKIR 62
Query: 714 V--EGRLYTIGTTQFESLVELISYYERH 739
G Y TQF SL +L++YY +H
Sbjct: 63 KLDSGGFYITSRTQFNSLQQLVAYYSKH 90
Score = 35.0 bits (80), Expect = 0.027
Identities = 23/80 (28%), Positives = 37/80 (46%), Gaps = 6/80 (7%)
Query: 391 NETVLPSPHQLRGKILLKHKKLPEGSDEQTPCAIAKDEGKLAEDKIKHCRIRV--EGRLY 448
+E +L + RG L++ + +G+ C D +KH +IR G Y
Sbjct: 15 SERLLLNAENPRGTFLVRESETTKGA----YCLSVSDFDNAKGLNVKHYKIRKLDSGGFY 70
Query: 449 TIGTTQFESLVELISYYERH 468
TQF SL +L++YY +H
Sbjct: 71 ITSRTQFNSLQQLVAYYSKH 90
>gnl|CDD|199832 cd10417, SH2_SH2D7, Src homology 2 domain found in the SH2 domain
containing protein 7 (SH2D7). SH2D7 contains a single
SH2 domain. In general SH2 domains are involved in
signal transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 102
Score = 54.5 bits (131), Expect = 4e-09
Identities = 29/83 (34%), Positives = 47/83 (56%), Gaps = 5/83 (6%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI-RVEGRLYT 720
W+H TR Q E LLR + G+FL+R S+ + Y++S+R D+ +H I ++ R Y
Sbjct: 9 WFHGFITRKQTEQLLRD-KALGSFLIRLSDR-ATGYILSYRGSDRCRHFVINQLRNRRYL 66
Query: 721 IG--TTQFESLVELISYYERHPL 741
I T+ +L EL+ +Y+ L
Sbjct: 67 ISGDTSSHSTLAELVRHYQEVQL 89
>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 = 53.0 bits (127), Expect = 4e-09
Identities = 25/58 (43%), Positives = 38/58 (65%), Gaps = 5/58 (8%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAE----GGWWRGDYGGKRMHWFPSNYVAEI 840
+ALY Y ++ +ELSFP+ A+I + RA+ G+WRG++GG R+ FPS V E+
Sbjct: 2 ARALYSYTGQSPEELSFPEGALIRLLPRAQDGVDDGFWRGEFGG-RVGVFPSLLVEEL 58
>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 = 53.0 bits (127), Expect = 4e-09
Identities = 24/55 (43%), Positives = 33/55 (60%), Gaps = 2/55 (3%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTR-AEGGWWRGDYGGKRMHWFPSNYVAE 839
T KA YD+ AR+ ELS + ++ + + GWWRG+ G R+ WFPS YV E
Sbjct: 1 TAKARYDFCARDMRELSLKEGDVVKIYNKKGQQGWWRGEING-RIGWFPSTYVEE 54
>gnl|CDD|241279 cd01248, PH_PLC_ELMO1, Phospholipase C and Engulfment and cell
motility protein 1 pleckstrin homology domain. The
C-terminal region of ELMO1, the PH domain and Pro-rich
sequences, binds the SH3-containing region of DOCK2
forming a intermolecular five-helix bundle allowing for
DOCK mediated Rac1 activation. ELMO1, a mammalian
homolog of C. elegans CED-12, contains an N-terminal
RhoG-binding region, a ELMO domain, a PH domain, and a
C-terminal sequence with three PxxP motifs. Specificaly,
PLCs catalyze the cleavage of
phosphatidylinositol-4,5-bisphosphate (PIP2) and result
in the release of 1,2-diacylglycerol (DAG) and inositol
1,4,5-triphosphate (IP3). These products trigger the
activation of protein kinase C (PKC) and the release of
Ca2+ from intracellular stores. There are fourteen kinds
of mammalian phospholipase C which are are classified
into six isotypes (beta, gamma, delta, epsilon, zeta,
eta). All PLCs, except for PLCzeta, have a PH domain
which is for most part N-terminally located, though
lipid binding specificity is not conserved between them.
In addition PLC gamma contains a split PH domain within
its catalytic domain that is separated by 2 SH2 domains
and a single SH3 domain. PH domains have diverse
functions, but in general are involved in targeting
proteins to the appropriate cellular location or in the
interaction with a binding partner. They share little
sequence conservation, but all have a common fold, which
is electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 108
Score = 54.2 bits (131), Expect = 5e-09
Identities = 32/71 (45%), Positives = 43/71 (60%), Gaps = 3/71 (4%)
Query: 28 KDEVDMREVKEVRVGKCFKDFDRWPEESGRVDAARCFIVLYGSEFKLKTLSIAAFSEKEC 87
K +D+ ++KEVR GK K F R ++S + RCF ++YGS K TL + A SE E
Sbjct: 41 KKSIDISDIKEVRPGKDTKGFKRK-KKSNKPKEERCFSIIYGSHNK--TLDLVAPSEDEA 97
Query: 88 GLWVTGLRYLV 98
LWV GLR L+
Sbjct: 98 NLWVEGLRALL 108
>gnl|CDD|198233 cd10370, SH2_Src_Src42, Src homology 2 (SH2) domain found in the
Src oncogene at 42A (Src42). Src42 is a member of the
Src non-receptor type tyrosine kinase family of
proteins. The integration of receptor tyrosine
kinase-induced RAS and Src42 signals by Connector
eNhancer of KSR (CNK) as a two-component input is
essential for RAF activation in Drosophila. Src42 is
present in a wide variety of organisms including:
California sea hare, pea aphid, yellow fever mosquito,
honey bee, Panamanian leafcutter ant, and sea urchin.
Src42 has a unique N-terminal domain, an SH3 domain, an
SH2 domain, a kinase domain and a regulatory tail, as do
the other members of the family. Like the other members
of the Src family the SH2 domain in addition to binding
the target, also plays an autoinhibitory role by binding
to its C-terminal tail. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 96
Score = 54.0 bits (130), Expect = 5e-09
Identities = 32/84 (38%), Positives = 45/84 (53%), Gaps = 4/84 (4%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSK 560
E W+ G++ AE + LL H G FL+R+SE+ DYSLS V H RIR
Sbjct: 3 EPWYFGKIKRIEAEKKLLLPENEH---GAFLIRDSESRHNDYSLSVRDGDTVKHYRIRQL 59
Query: 561 PESGQFYLVEKSYFDSLYSLISHY 584
E G F++ ++ F +L L+ HY
Sbjct: 60 DEGG-FFIARRTTFRTLQELVEHY 82
Score = 51.7 bits (124), Expect = 3e-08
Identities = 32/86 (37%), Positives = 45/86 (52%), Gaps = 3/86 (3%)
Query: 658 EDKEWYHPTATRSQAED-LLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRV-- 714
E + WY R +AE LL GAFL+R SE+ ++ Y +S R D +KH RIR
Sbjct: 1 EAEPWYFGKIKRIEAEKKLLLPENEHGAFLIRDSESRHNDYSLSVRDGDTVKHYRIRQLD 60
Query: 715 EGRLYTIGTTQFESLVELISYYERHP 740
EG + T F +L EL+ +Y +
Sbjct: 61 EGGFFIARRTTFRTLQELVEHYSKDS 86
Score = 29.0 bits (65), Expect = 3.2
Identities = 14/38 (36%), Positives = 20/38 (52%), Gaps = 2/38 (5%)
Query: 434 DKIKHCRIRV--EGRLYTIGTTQFESLVELISYYERHP 469
D +KH RIR EG + T F +L EL+ +Y +
Sbjct: 49 DTVKHYRIRQLDEGGFFIARRTTFRTLQELVEHYSKDS 86
>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 = 52.3 bits (126), Expect = 5e-09
Identities = 24/51 (47%), Positives = 28/51 (54%), Gaps = 1/51 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
V ALYDY A DDELSF + II + + GW+ G G FP NYV
Sbjct: 2 VVALYDYTADKDDELSFQEGDIIYVTKKNDDGWYEGVLNG-VTGLFPGNYV 51
>gnl|CDD|198191 cd09938, SH2_N-SH2_Zap70_Syk_like, N-terminal Src homology 2 (SH2)
domain found in Zeta-chain-associated protein kinase 70
(ZAP-70) and Spleen tyrosine kinase (Syk) proteins.
ZAP-70 and Syk comprise a family of hematopoietic cell
specific protein tyrosine kinases (PTKs) that are
required for antigen and antibody receptor function.
ZAP-70 is expressed in T and natural killer (NK) cells
and Syk is expressed in B cells, mast cells,
polymorphonuclear leukocytes, platelets, macrophages,
and immature T cells. They are required for the proper
development of T and B cells, immune receptors, and
activating NK cells. They consist of two N-terminal Src
homology 2 (SH2) domains and a C-terminal kinase domain
separated from the SH2 domains by a linker or hinge
region. Phosphorylation of both tyrosine residues within
the Immunoreceptor Tyrosine-based Activation Motifs
(ITAM; consensus sequence Yxx[LI]x(7,8)Yxx[LI]) by the
Src-family PTKs is required for efficient interaction of
ZAP-70 and Syk with the receptor subunits and for
receptor function. ZAP-70 forms two phosphotyrosine
binding pockets, one of which is shared by both SH2
domains. In Syk the two SH2 domains do not form such a
phosphotyrosine-binding site. The SH2 domains here are
believed to function independently. In addition, the two
SH2 domains of Syk display flexibility in their relative
orientation, allowing Syk to accommodate a greater
variety of spacing sequences between the ITAM
phosphotyrosines and singly phosphorylated non-classical
ITAM ligands. This model contains the N-terminus SH2
domains of both Syk and Zap70. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 104
Score = 53.9 bits (130), Expect = 7e-09
Identities = 25/103 (24%), Positives = 49/103 (47%), Gaps = 7/103 (6%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
+F+G ++ R EAE+ L+ + + DG FL+R+S +G Y LS + +H I +
Sbjct: 3 FFYGSIT--REEAEEYLKL-AGMSDGLFLLRQSLRSLGGYVLSVCHGRKFHHYTIERQL- 58
Query: 563 SGQFYLVEKSYFDSLYSLISHYRTNHLRSQEFLITLQEPVPQP 605
+G + + L ++ T+ + L++P +P
Sbjct: 59 NGTYAIAGGKAHCGPAELCEYHSTD---LDGLVCLLRKPCNRP 98
Score = 43.2 bits (102), Expect = 4e-05
Identities = 25/82 (30%), Positives = 35/82 (42%), Gaps = 3/82 (3%)
Query: 662 WYHPTATRSQAEDLLRRV-PSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI-RVEGRLY 719
+++ + TR +AE+ L+ SDG FL+R S YV+S K H I R Y
Sbjct: 3 FFYGSITREEAEEYLKLAGMSDGLFLLRQSLRSLGGYVLSVCHGRKFHHYTIERQLNGTY 62
Query: 720 TI-GTTQFESLVELISYYERHP 740
I G EL Y+
Sbjct: 63 AIAGGKAHCGPAELCEYHSTDL 84
Score = 32.8 bits (75), Expect = 0.17
Identities = 13/37 (35%), Positives = 21/37 (56%), Gaps = 1/37 (2%)
Query: 613 WYHPTATRSQAEDLLRRV-PSDGAFLVRPSENDNSSY 648
+++ + TR +AE+ L+ SDG FL+R S Y
Sbjct: 3 FFYGSITREEAEEYLKLAGMSDGLFLLRQSLRSLGGY 39
>gnl|CDD|198188 cd09934, SH2_Tec_family, Src homology 2 (SH2) domain found in
Tec-like proteins. The Tec protein tyrosine kinase is
the founding member of a family that includes Btk, Itk,
Bmx, and Txk. The members have a PH domain, a
zinc-binding motif, a SH3 domain, a SH2 domain, and a
protein kinase catalytic domain. Btk is involved in
B-cell receptor signaling with mutations in Btk
responsible for X-linked agammaglobulinemia (XLA) in
humans and X-linked immunodeficiency (xid) in mice. Itk
is involved in T-cell receptor signaling. Tec is
expressed in both T and B cells, and is thought to
function in activated and effector T lymphocytes to
induce the expression of genes regulated by NFAT
transcription factors. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 104
Score = 53.6 bits (129), Expect = 8e-09
Identities = 29/89 (32%), Positives = 48/89 (53%), Gaps = 10/89 (11%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQ----GRVNHCRIR 558
W+ G +S R AE LL++ +G F+VR S T G Y++S + + V H I+
Sbjct: 8 WYVGDMS--RQRAESLLKQEDK--EGCFVVRNSST-KGLYTVSLFTKVPGSPHVKHYHIK 62
Query: 559 SKPESGQFYLVEKSYFDSLYSLISHYRTN 587
+FYL EK F+++ LI++++ N
Sbjct: 63 QNAR-SEFYLAEKHCFETIPELINYHQHN 90
Score = 52.8 bits (127), Expect = 1e-08
Identities = 30/101 (29%), Positives = 45/101 (44%), Gaps = 7/101 (6%)
Query: 658 EDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISF----RAEDKIKHCRIR 713
E EWY +R +AE LL++ +G F+VR S Y +S +KH I+
Sbjct: 4 EKYEWYVGDMSRQRAESLLKQEDKEGCFVVRNSST-KGLYTVSLFTKVPGSPHVKHYHIK 62
Query: 714 V--EGRLYTIGTTQFESLVELISYYERHPLYKKIELWYPVS 752
Y FE++ ELI+Y++ + L YPV
Sbjct: 63 QNARSEFYLAEKHCFETIPELINYHQHNSGGLATRLKYPVC 103
Score = 42.4 bits (100), Expect = 6e-05
Identities = 14/33 (42%), Positives = 20/33 (60%)
Query: 609 EDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPS 641
E EWY +R +AE LL++ +G F+VR S
Sbjct: 4 EKYEWYVGDMSRQRAESLLKQEDKEGCFVVRNS 36
>gnl|CDD|198215 cd10352, SH2_a2chimerin_b2chimerin, Src homology 2 (SH2) domain
found in alpha2-chimerin and beta2-chimerin proteins.
Chimerins are a family of phorbol ester- and
diacylglycerol-responsive GTPase-activating proteins.
Alpha1-chimerin (formerly known as n-chimerin) and
alpha2-chimerin are alternatively spliced products of a
single gene, as are beta1- and beta2-chimerin. alpha1-
and beta1-chimerin have a relatively short N-terminal
region that does not encode any recognizable domains,
whereas alpha2- and beta2-chimerin both include a
functional SH2 domain that can bind to phosphotyrosine
motifs within receptors. All of the isoforms contain a
GAP domain with specificity in vitro for Rac1 and a
diacylglycerol (DAG)-binding C1 domain which allows them
to translocate to membranes in response to DAG signaling
and anchors them in close proximity to activated Rac.
Other C1 domain-containing diacylglycerol receptors
including: PKC, Munc-13 proteins, phorbol ester binding
scaffolding proteins involved in Ca2+-stimulated
exocytosis, and RasGRPs, diacylglycerol-activated
guanine-nucleotide exchange factors (GEFs) for Ras and
Rap1. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 91
Score = 52.8 bits (127), Expect = 1e-08
Identities = 28/78 (35%), Positives = 46/78 (58%), Gaps = 6/78 (7%)
Query: 504 FHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPES 563
+HG +S R EAE LL S DG++L+RES G Y+LS + G+V + ++ ++
Sbjct: 9 YHGLIS--REEAEQLLSGAS---DGSYLIRESSRDDGYYTLSLRFNGKVKNYKLYYDGKN 63
Query: 564 GQFYLVEKSYFDSLYSLI 581
Y+ EK FD+++ L+
Sbjct: 64 HYHYVGEKR-FDTIHDLV 80
Score = 46.6 bits (111), Expect = 2e-06
Identities = 23/73 (31%), Positives = 43/73 (58%), Gaps = 3/73 (4%)
Query: 663 YHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEG--RLYT 720
YH +R +AE LL SDG++L+R S D+ Y +S R K+K+ ++ +G +
Sbjct: 9 YHGLISREEAEQLLS-GASDGSYLIRESSRDDGYYTLSLRFNGKVKNYKLYYDGKNHYHY 67
Query: 721 IGTTQFESLVELI 733
+G +F+++ +L+
Sbjct: 68 VGEKRFDTIHDLV 80
Score = 31.2 bits (71), Expect = 0.38
Identities = 15/35 (42%), Positives = 21/35 (60%), Gaps = 1/35 (2%)
Query: 614 YHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSY 648
YH +R +AE LL SDG++L+R S D+ Y
Sbjct: 9 YHGLISREEAEQLLS-GASDGSYLIRESSRDDGYY 42
>gnl|CDD|198211 cd10348, SH2_Cterm_shark_like, C-terminal Src homology 2 (SH2)
domain found in SH2 domains, ANK, and kinase domain
(shark) proteins. These non-receptor protein-tyrosine
kinases contain two SH2 domains, five ankyrin (ANK)-like
repeats, and a potential tyrosine phosphorylation site
in its carboxyl-terminal tail which resembles the
phosphorylation site in members of the src family. Like,
mammalian non-receptor protein-tyrosine kinases, ZAP-70
and syk proteins, they do not have SH3 domains. However,
the presence of ANK makes these unique among
protein-tyrosine kinases. Both tyrosine kinases and ANK
repeats have been shown to transduce developmental
signals, and SH2 domains are known to participate
intimately in tyrosine kinase signaling. These tyrosine
kinases are believed to be involved in epithelial cell
polarity. The members of this family include the shark
(SH2 domains, ANK, and kinase domain) gene in Drosophila
and yellow fever mosquitos, as well as the hydra protein
HTK16. Drosophila Shark is proposed to transduce
intracellularly the Crumbs, a protein necessary for
proper organization of ectodermal epithelia,
intercellular signal. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 86
Score = 52.8 bits (127), Expect = 1e-08
Identities = 31/82 (37%), Positives = 47/82 (57%), Gaps = 4/82 (4%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W HG L R EA ++L++ + DG+FLVR S G Y L+ ++ V H I+++ +
Sbjct: 2 WLHGALD--RNEAVEILKQKA-DADGSFLVRYSRRRPGGYVLTLVYENHVYHFEIQNR-D 57
Query: 563 SGQFYLVEKSYFDSLYSLISHY 584
FY+ + YF+SL LI HY
Sbjct: 58 DKWFYIDDGPYFESLEHLIEHY 79
Score = 50.9 bits (122), Expect = 5e-08
Identities = 25/83 (30%), Positives = 41/83 (49%), Gaps = 3/83 (3%)
Query: 661 EWYHPTATRSQAEDLLR-RVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGR-- 717
+W H R++A ++L+ + +DG+FLVR S YV++ E+ + H I+
Sbjct: 1 QWLHGALDRNEAVEILKQKADADGSFLVRYSRRRPGGYVLTLVYENHVYHFEIQNRDDKW 60
Query: 718 LYTIGTTQFESLVELISYYERHP 740
Y FESL LI +Y +
Sbjct: 61 FYIDDGPYFESLEHLIEHYTQFA 83
Score = 35.1 bits (81), Expect = 0.018
Identities = 13/38 (34%), Positives = 22/38 (57%), Gaps = 1/38 (2%)
Query: 612 EWYHPTATRSQAEDLLR-RVPSDGAFLVRPSENDNSSY 648
+W H R++A ++L+ + +DG+FLVR S Y
Sbjct: 1 QWLHGALDRNEAVEILKQKADADGSFLVRYSRRRPGGY 38
>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 = 51.6 bits (124), Expect = 1e-08
Identities = 23/52 (44%), Positives = 29/52 (55%), Gaps = 1/52 (1%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
KALY Y A +DELS II + + GWW G+ GK+ FP+ YV E
Sbjct: 3 KALYSYTANREDELSLQPGDIIEVHEKQDDGWWLGELNGKKGI-FPATYVEE 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 = 51.6 bits (124), Expect = 1e-08
Identities = 25/52 (48%), Positives = 31/52 (59%), Gaps = 3/52 (5%)
Query: 788 KALYDYQARNDDELSFPKHAII--SNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ALY ++ARN DE+SF II AE GW G+ GK WFP+NYV
Sbjct: 3 RALYAFEARNPDEISFQPGDIIQVDESQVAEPGWLAGELKGK-TGWFPANYV 53
>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 = 51.6 bits (123), Expect = 1e-08
Identities = 22/49 (44%), Positives = 30/49 (61%), Gaps = 1/49 (2%)
Query: 791 YDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
++Y A +DELS K + + + GWWRG Y G ++ WFPSNYV E
Sbjct: 8 FNYTAEREDELSLVKGTKVIVMEKCSDGWWRGSYNG-QVGWFPSNYVTE 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 = 51.5 bits (123), Expect = 1e-08
Identities = 24/51 (47%), Positives = 33/51 (64%), Gaps = 1/51 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
V A+YDY A N+DELSF K +I+ + + + WW+G+ G FPSNYV
Sbjct: 3 VIAMYDYTANNEDELSFSKGQLINVLNKDDPDWWQGEINGV-TGLFPSNYV 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 = 51.4 bits (123), Expect = 1e-08
Identities = 22/52 (42%), Positives = 32/52 (61%), Gaps = 1/52 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVA 838
V+ALYD++A DDEL F +I + + WW+G G ++ FP+NYVA
Sbjct: 2 VRALYDFEALEDDELGFNSGDVIEVLDSSNPSWWKGRLHG-KLGLFPANYVA 52
>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 = 51.5 bits (124), Expect = 1e-08
Identities = 22/53 (41%), Positives = 33/53 (62%), Gaps = 1/53 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
+ALYDY+A++ DELSF + ++ +++ WW+ GGK PSNYV E
Sbjct: 2 FRALYDYEAQHPDELSFEEGDLLYISDKSDPNWWKATCGGKT-GLIPSNYVEE 53
>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 = 51.5 bits (123), Expect = 1e-08
Identities = 22/49 (44%), Positives = 31/49 (63%), Gaps = 1/49 (2%)
Query: 791 YDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
+ Y A +DELS K + ++ + + GWWRG Y G+ + WFPSNYV E
Sbjct: 7 FAYVAEREDELSLVKGSRVTVMEKCSDGWWRGSYNGQ-IGWFPSNYVVE 54
>gnl|CDD|198277 cd10414, SH2_Grb14, Src homology 2 (SH2) domain found in the growth
factor receptor bound, subclass 14 (Grb14) proteins.
The Grb family binds to the epidermal growth factor
receptor (EGFR, erbB1) via their SH2 domains. Grb14 is
part of the Grb7 family of proteins which also includes
Grb7, and Grb14. They are composed of an N-terminal
Proline-rich domain, a Ras Associating-like (RA) domain,
a Pleckstrin Homology (PH) domain, a phosphotyrosine
interaction region (PIR, BPS) and a C-terminal SH2
domain. The SH2 domains of Grb7, Grb10 and Grb14
preferentially bind to a different RTK. Grb14 binds to
Fibroblast Growth Factor Receptor (FGFR) and weakly to
the erbB2 receptor. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 108
Score = 52.6 bits (126), Expect = 2e-08
Identities = 29/88 (32%), Positives = 53/88 (60%), Gaps = 7/88 (7%)
Query: 657 HEDKEWYHPTATRSQAEDL-LRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI--- 712
H + W+H +R +A+ L +++ DG FLVR S+++ ++V+S KIKH +I
Sbjct: 2 HRSQPWFHHKISRDEAQRLIIQQGLVDGVFLVRDSQSNPRTFVLSMSHGQKIKHFQIIPV 61
Query: 713 RVEGRL-YTI--GTTQFESLVELISYYE 737
+G L +T+ G T+F L++L+ +Y+
Sbjct: 62 EDDGELFHTLDDGHTRFTDLIQLVEFYQ 89
Score = 43.4 bits (102), Expect = 4e-05
Identities = 28/94 (29%), Positives = 50/94 (53%), Gaps = 6/94 (6%)
Query: 497 LHFGEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCR 556
+H + WFH ++S R EA+ L+ + L DG FLVR+S++ + LS ++ H +
Sbjct: 1 IHRSQPWFHHKIS--RDEAQRLIIQQG-LVDGVFLVRDSQSNPRTFVLSMSHGQKIKHFQ 57
Query: 557 IRSKPESGQ-FYLVEKSY--FDSLYSLISHYRTN 587
I + G+ F+ ++ + F L L+ Y+ N
Sbjct: 58 IIPVEDDGELFHTLDDGHTRFTDLIQLVEFYQLN 91
Score = 32.6 bits (74), Expect = 0.18
Identities = 13/42 (30%), Positives = 26/42 (61%), Gaps = 1/42 (2%)
Query: 608 HEDKEWYHPTATRSQAEDL-LRRVPSDGAFLVRPSENDNSSY 648
H + W+H +R +A+ L +++ DG FLVR S+++ ++
Sbjct: 2 HRSQPWFHHKISRDEAQRLIIQQGLVDGVFLVRDSQSNPRTF 43
>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 = 50.4 bits (121), Expect = 2e-08
Identities = 22/54 (40%), Positives = 32/54 (59%), Gaps = 1/54 (1%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
T ALY ++A+ ++ LSF K II+ + + E WW G+ G WFP +YV E
Sbjct: 1 TATALYPWRAKKENHLSFAKGDIITVLEQQE-MWWFGELEGGEEGWFPKSYVKE 53
>gnl|CDD|176500 cd08557, PI-PLCc_bacteria_like, Catalytic domain of bacterial
phosphatidylinositol-specific phospholipase C and
similar proteins. This subfamily corresponds to the
catalytic domain present in bacterial
phosphatidylinositol-specific phospholipase C (PI-PLC,
EC 4.6.1.13) and their sequence homologs found in
eukaryota. Bacterial PI-PLCs participate in
Ca2+-independent PI metabolism, hydrolyzing the membrane
lipid phosphatidylinositol (PI) to produce
phosphorylated myo-inositol and diacylglycerol (DAG).
Although their precise physiological function remains
unclear, bacterial PI-PLCs may function as virulence
factors in some pathogenic bacteria. Bacterial PI-PLCs
contain a single TIM-barrel type catalytic domain. Its
catalytic mechanism is based on general base and acid
catalysis utilizing two well conserved histidines, and
consists of two steps, a phosphotransfer and a
phosphodiesterase reaction. Eukaryotic homologs in this
family are named as phosphatidylinositol-specific
phospholipase C X domain containing proteins (PI-PLCXD).
They are distinct from the typical eukaryotic
phosphoinositide-specific phospholipases C (PI-PLC, EC
3.1.4.11), which have a multidomain organization that
consists of a PLC catalytic core domain, and various
regulatory domains. The catalytic core domain is
assembled from two highly conserved X- and Y-regions
split by a divergent linker sequence. In contrast,
eukaryotic PI-PLCXDs contain a single TIM-barrel type
catalytic domain, X domain, which is closely related to
that of bacterial PI-PLCs. Although the biological
function of eukaryotic PI-PLCXDs still remains unclear,
it may be distinct from that of typical eukaryotic
PI-PLCs. This family also includes a distinctly
different type of eukaryotic PLC,
glycosylphosphatidylinositol-specific phospholipase C
(GPI-PLC), an integral membrane protein characterized in
the protozoan parasite Trypanosoma brucei. T. brucei
GPI-PLC hydrolyzes the GPI-anchor on the variant
specific glycoprotein (VSG), releasing dimyristyl
glycerol (DMG), which may facilitate the evasion of the
protozoan to the host's immune system. It does not
require Ca2+ for its activity and is more closely
related to bacterial PI-PLCs, but not mammalian PI-PLCs.
Length = 271
Score = 55.6 bits (134), Expect = 3e-08
Identities = 42/159 (26%), Positives = 61/159 (38%), Gaps = 26/159 (16%)
Query: 267 DMTKPLSHYFINSSHNTY-LTGDQFSSESSCEAYVRC--------LRQGCRCIELDCWDG 317
PLS I +HN+Y T D S S + + L G R ++L
Sbjct: 4 LDDLPLSQLSIPGTHNSYAYTIDGNSPIVS--KWSKTQDLSITDQLDAGVRYLDLRVAYD 61
Query: 318 PDGTPI-VYHGHTLTTKIKFKDVVKTIRDHAF--ETSKYPVILSIE-----DNCSLPQQR 369
PD + V HG L +DV+ ++D F VIL +E DN +
Sbjct: 62 PDDGDLYVCHGLFLLNGQTLEDVLNEVKD--FLDAHPSEVVILDLEHEYGGDNGEDHDEL 119
Query: 370 VMAQIMLDIFKDMLLIHPVEKNETVLPSPHQLR-GKILL 407
++ D+ D L PV P+ +LR GK +L
Sbjct: 120 D--ALLRDVLGDPLYRPPVRAGGW--PTLGELRAGKRVL 154
>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 = 50.4 bits (121), Expect = 3e-08
Identities = 21/53 (39%), Positives = 27/53 (50%), Gaps = 2/53 (3%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNV-TRAEGGWWRGDYGGKRMHWFPSNYV 837
+ALY +A ++ ELSF II+NV E GW G G+ P NYV
Sbjct: 1 RARALYACKAEDESELSFEPGQIITNVQPSDEPGWLEGTLNGRT-GLIPENYV 52
>gnl|CDD|198178 cd09923, SH2_SOCS_family, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) family. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 81
Score = 51.0 bits (123), Expect = 4e-08
Identities = 27/81 (33%), Positives = 38/81 (46%), Gaps = 6/81 (7%)
Query: 661 EWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEG---R 717
WY TR +AE+LL P +G FLVR S + + +SFR + H RI
Sbjct: 1 GWYWGGITRYEAEELLAGKP-EGTFLVRDSSDSRYLFSVSFRTYGRTLHARIEYSNGRFS 59
Query: 718 LYTIGT--TQFESLVELISYY 736
+ +F +VELI +Y
Sbjct: 60 FDSSDPSVPRFPCVVELIEHY 80
Score = 42.6 bits (101), Expect = 3e-05
Identities = 30/86 (34%), Positives = 41/86 (47%), Gaps = 11/86 (12%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W+ G ++ R EAE+LL +GTFLVR+S +S+SF GR H RI
Sbjct: 2 WYWGGIT--RYEAEELLAGKP---EGTFLVRDSSDSRYLFSVSFRTYGRTLHARIEY--S 54
Query: 563 SGQFYLVEKS----YFDSLYSLISHY 584
+G+F F + LI HY
Sbjct: 55 NGRFSFDSSDPSVPRFPCVVELIEHY 80
Score = 37.2 bits (87), Expect = 0.002
Identities = 15/35 (42%), Positives = 19/35 (54%), Gaps = 1/35 (2%)
Query: 612 EWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNS 646
WY TR +AE+LL P +G FLVR S +
Sbjct: 1 GWYWGGITRYEAEELLAGKP-EGTFLVRDSSDSRY 34
>gnl|CDD|198207 cd10344, SH2_SLAP, Src homology 2 domain found in Src-like adaptor
proteins. SLAP belongs to the subfamily of adapter
proteins that negatively regulate cellular signaling
initiated by tyrosine kinases. It has a myristylated
N-terminus, SH3 and SH2 domains with high homology to
Src family tyrosine kinases, and a unique C-terminal
tail, which is important for c-Cbl binding. SLAP
negatively regulates platelet-derived growth factor
(PDGF)-induced mitogenesis in fibroblasts and regulates
F-actin assembly for dorsal ruffles formation. c-Cbl
mediated SLAP inhibition towards actin remodeling.
Moreover, SLAP enhanced PDGF-induced c-Cbl
phosphorylation by SFK. In contrast, SLAP mitogenic
inhibition was not mediated by c-Cbl, but it rather
involved a competitive mechanism with SFK for
PDGF-receptor (PDGFR) association and mitogenic
signaling. Accordingly, phosphorylation of the Src
mitogenic substrates Stat3 and Shc were reduced by SLAP.
Thus, we concluded that SLAP regulates PDGFR signaling
by two independent mechanisms: a competitive mechanism
for PDGF-induced Src mitogenic signaling and a
non-competitive mechanism for dorsal ruffles formation
mediated by c-Cbl. SLAP is a hematopoietic adaptor
containing Src homology (SH)3 and SH2 motifs and a
unique carboxy terminus. Unlike c-Src, SLAP lacks a
tyrosine kinase domain. Unlike c-Src, SLAP does not
impact resorptive function of mature osteoclasts but
induces their early apoptosis. SLAP negatively regulates
differentiation of osteoclasts and proliferation of
their precursors. Conversely, SLAP decreases osteoclast
death by inhibiting activation of caspase 3. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 104
Score = 51.7 bits (124), Expect = 4e-08
Identities = 34/90 (37%), Positives = 48/90 (53%), Gaps = 9/90 (10%)
Query: 502 KWFHGRLSGG--RAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLS-----FWWQGRVNH 554
K +HG L G R +AE+LL G+FL+RESET G YSLS + V H
Sbjct: 7 KVYHGWLFEGLSREKAEELLM-LPGNQVGSFLIRESETRRGCYSLSVRHRGSQSRDSVKH 65
Query: 555 CRIRSKPESGQFYLVEKSYFDSLYSLISHY 584
RI + ++G FY+ + F L +++HY
Sbjct: 66 YRI-FRLDNGWFYISPRLTFQCLEDMVNHY 94
Score = 41.7 bits (98), Expect = 1e-04
Identities = 27/84 (32%), Positives = 45/84 (53%), Gaps = 10/84 (11%)
Query: 662 WYHPTATRSQAEDLLRRVPSD--GAFLVRPSENDNSSYVISFR-----AEDKIKHCRI-R 713
W +R +AE+LL +P + G+FL+R SE Y +S R + D +KH RI R
Sbjct: 12 WLFEGLSREKAEELLM-LPGNQVGSFLIRESETRRGCYSLSVRHRGSQSRDSVKHYRIFR 70
Query: 714 VE-GRLYTIGTTQFESLVELISYY 736
++ G Y F+ L +++++Y
Sbjct: 71 LDNGWFYISPRLTFQCLEDMVNHY 94
>gnl|CDD|198226 cd10363, SH2_Src_HCK, Src homology 2 (SH2) domain found in HCK.
HCK is a member of the Src non-receptor type tyrosine
kinase family of proteins and is expressed in
hemopoietic cells. HCK is proposed to couple the Fc
receptor to the activation of the respiratory burst. It
may also play a role in neutrophil migration and in the
degranulation of neutrophils. It has two different
translational starts that have different subcellular
localization. HCK has been shown to interact with BCR
gene, ELMO1 Cbl gene, RAS p21 protein activator 1,
RASA3, Granulocyte colony-stimulating factor receptor,
ADAM15 and RAPGEF1. Like the other members of the Src
family the SH2 domain in addition to binding the target,
also plays an autoinhibitory role by binding to its
C-terminal tail. In general SH2 domains are involved in
signal transduction. HCK has a unique N-terminal domain,
an SH3 domain, an SH2 domain, a kinase domain and a
regulatory tail, as do the other members of the family.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 104
Score = 51.5 bits (123), Expect = 5e-08
Identities = 33/90 (36%), Positives = 50/90 (55%), Gaps = 9/90 (10%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSF-----WWQGRVNHC 555
E+WF +S AE + LL + LG +F++R+SET G YSLS V H
Sbjct: 3 EEWFFKGISRKDAERQ-LLAPGNMLG--SFMIRDSETTKGSYSLSVRDYDPQHGDTVKHY 59
Query: 556 RIRSKPESGQFYLVEKSYFDSLYSLISHYR 585
+IR+ ++G FY+ +S F +L L+ HY+
Sbjct: 60 KIRTL-DNGGFYISPRSTFSTLQELVDHYK 88
Score = 45.7 bits (108), Expect = 5e-06
Identities = 29/89 (32%), Positives = 44/89 (49%), Gaps = 8/89 (8%)
Query: 658 EDKEWYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNSSYVISFR-----AEDKIKHCR 711
E +EW+ +R AE LL G+F++R SE SY +S R D +KH +
Sbjct: 1 ETEEWFFKGISRKDAERQLLAPGNMLGSFMIRDSETTKGSYSLSVRDYDPQHGDTVKHYK 60
Query: 712 IRV--EGRLYTIGTTQFESLVELISYYER 738
IR G Y + F +L EL+ +Y++
Sbjct: 61 IRTLDNGGFYISPRSTFSTLQELVDHYKK 89
Score = 28.8 bits (64), Expect = 4.0
Identities = 19/78 (24%), Positives = 36/78 (46%), Gaps = 6/78 (7%)
Query: 392 ETVLPSPHQLRGKILLKHKKLPEGSDEQTPCAIAKDEGKLAEDKIKHCRIRV--EGRLYT 449
E L +P + G +++ + +GS + +D D +KH +IR G Y
Sbjct: 16 ERQLLAPGNMLGSFMIRDSETTKGSYSLS----VRDYDPQHGDTVKHYKIRTLDNGGFYI 71
Query: 450 IGTTQFESLVELISYYER 467
+ F +L EL+ +Y++
Sbjct: 72 SPRSTFSTLQELVDHYKK 89
>gnl|CDD|198225 cd10362, SH2_Src_Lck, Src homology 2 (SH2) domain in lymphocyte
cell kinase (Lck). Lck is a member of the Src
non-receptor type tyrosine kinase family of proteins. It
is expressed in the brain, T-cells, and NK cells. The
unique domain of Lck mediates its interaction with two
T-cell surface molecules, CD4 and CD8. It associates
with their cytoplasmic tails on CD4 T helper cells and
CD8 cytotoxic T cells to assist signaling from the T
cell receptor (TCR) complex. When the T cell receptor is
engaged by the specific antigen presented by MHC, Lck
phosphorylase the intracellular chains of the CD3 and
zeta-chains of the TCR complex, allowing ZAP-70 to bind
them. Lck then phosphorylates and activates ZAP-70,
which in turn phosphorylates Linker of Activated T cells
(LAT), a transmembrane protein that serves as a docking
site for proteins including: Shc-Grb2-SOS, PI3K, and
phospholipase C (PLC). The tyrosine phosphorylation
cascade culminates in the intracellular mobilization of
a calcium ions and activation of important signaling
cascades within the lymphocyte, including the
Ras-MEK-ERK pathway, which goes on to activate certain
transcription factors such as NFAT, NF-kappaB, and AP-1.
These transcription factors regulate the production
cytokines such as Interleukin-2 that promote long-term
proliferation and differentiation of the activated
lymphocytes. The N-terminal tail of Lck is
myristoylated and palmitoylated and it tethers the
protein to the plasma membrane of the cell. Lck also
contains a SH3 domain, a SH2 domain, and a C-terminal
tyrosine kinase domain. Lck has 2 phosphorylation sites,
the first an autophosphorylation site that is linked to
activation of the protein and the second which is
phosphorylated by Csk, which inhibits it. Lck is also
inhibited by SHP-1 dephosphorylation and by Cbl
ubiquitin ligase, which is part of the
ubiquitin-mediated pathway. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 51.0 bits (122), Expect = 5e-08
Identities = 35/89 (39%), Positives = 48/89 (53%), Gaps = 9/89 (10%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSF----WWQGR-VNHC 555
E WF LS AE + L +H G+FL+RESET G +SLS QG V H
Sbjct: 3 EPWFFKNLSRNDAERQLLAPGNTH---GSFLIRESETTAGSFSLSVRDFDQNQGEVVKHY 59
Query: 556 RIRSKPESGQFYLVEKSYFDSLYSLISHY 584
+IR+ ++G FY+ + F L+ L+ HY
Sbjct: 60 KIRNL-DNGGFYISPRITFPGLHELVRHY 87
Score = 42.2 bits (99), Expect = 7e-05
Identities = 28/89 (31%), Positives = 42/89 (47%), Gaps = 8/89 (8%)
Query: 658 EDKEWYHPTATRSQAED-LLRRVPSDGAFLVRPSENDNSSYVISFRAEDK-----IKHCR 711
E + W+ +R+ AE LL + G+FL+R SE S+ +S R D+ +KH +
Sbjct: 1 EPEPWFFKNLSRNDAERQLLAPGNTHGSFLIRESETTAGSFSLSVRDFDQNQGEVVKHYK 60
Query: 712 IRV--EGRLYTIGTTQFESLVELISYYER 738
IR G Y F L EL+ +Y
Sbjct: 61 IRNLDNGGFYISPRITFPGLHELVRHYTN 89
>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 = 49.6 bits (118), Expect = 6e-08
Identities = 27/56 (48%), Positives = 37/56 (66%), Gaps = 4/56 (7%)
Query: 787 VKALYDYQARNDDELSFPKHAII---SNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
VKALYDY+ + DDELSFP+ AII + + + G+W G++ G R+ FPS V E
Sbjct: 2 VKALYDYEGQTDDELSFPEGAIIRILNKENQDDDGFWEGEFNG-RIGVFPSVLVEE 56
>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 = 49.3 bits (118), Expect = 7e-08
Identities = 20/54 (37%), Positives = 35/54 (64%), Gaps = 3/54 (5%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTR--AEGGWWRGDYGGKRMHWFPSNYV 837
+ L+DY+A N+DEL+ + I++ +++ + GWW+G+ GKR FP N+V
Sbjct: 1 KARVLFDYEAENEDELTLREGDIVTILSKDCEDKGWWKGELNGKR-GVFPDNFV 53
>gnl|CDD|198264 cd10401, SH2_C-SH2_Syk_like, C-terminal Src homology 2 (SH2) domain
found in Spleen tyrosine kinase (Syk) proteins. ZAP-70
and Syk comprise a family of hematopoietic cell specific
protein tyrosine kinases (PTKs) that are required for
antigen and antibody receptor function. ZAP-70 is
expressed in T and natural killer (NK) cells and Syk is
expressed in B cells, mast cells, polymorphonuclear
leukocytes, platelets, macrophages, and immature T
cells. They are required for the proper development of T
and B cells, immune receptors, and activating NK cells.
They consist of two N-terminal Src homology 2 (SH2)
domains and a C-terminal kinase domain separated from
the SH2 domains by a linker or hinge region.
Phosphorylation of both tyrosine residues within the
Immunoreceptor Tyrosine-based Activation Motifs (ITAM;
consensus sequence Yxx[LI]x(7,8)Yxx[LI]) by the
Src-family PTKs is required for efficient interaction of
ZAP-70 and Syk with the receptor subunits and for
receptor function. ZAP-70 forms two phosphotyrosine
binding pockets, one of which is shared by both SH2
domains. In Syk the two SH2 domains do not form such a
phosphotyrosine-binding site. The SH2 domains here are
believed to function independently. In addition, the two
SH2 domains of Syk display flexibility in their relative
orientation, allowing Syk to accommodate a greater
variety of spacing sequences between the ITAM
phosphotyrosines and singly phosphorylated non-classical
ITAM ligands. This model contains the C-terminus SH2
domains of Syk. In general SH2 domains are involved in
signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 99
Score = 50.7 bits (121), Expect = 7e-08
Identities = 36/103 (34%), Positives = 55/103 (53%), Gaps = 8/103 (7%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
WFHG++S R E+E +L S +G FL+RE + G Y+L G+V H RI K +
Sbjct: 5 WFHGKIS--REESEQILLIGSKT-NGKFLIRERDNN-GSYALCLLHDGKVLHYRI-DKDK 59
Query: 563 SGQFYLVEKSYFDSLYSLISHYRTNHLRSQEFLITLQEPVPQP 605
+G+ + + FD+L+ L+ HY + L L EP P+
Sbjct: 60 TGKLSIPDGKKFDTLWQLVEHYS---YKPDGLLRVLTEPCPRI 99
>gnl|CDD|198268 cd10405, SH2_Vav1, Src homology 2 (SH2) domain found in the Vav1
proteins. Proto-oncogene vav is a member of the Dbl
family of guanine nucleotide exchange factors (GEF) for
the Rho family of GTP binding proteins. All vavs are
activated by tyrosine phosphorylation leading to their
activation. There are three Vav mammalian family
members: Vav1 which is expressed in the hematopoietic
system, and Vav2 and Vav3 are more ubiquitously
expressed. Vav1 plays a role in T-cell and B-cell
development and activation. It has been identified as
the specific binding partner of Nef proteins from HIV-1,
resulting in morphological changes, cytoskeletal
rearrangements, and the JNK/SAPK signaling cascade,
leading to increased levels of viral transcription and
replication. Vav1 has been shown to interact with Ku70,
PLCG1, Lymphocyte cytosolic protein 2, Janus kinase 2,
SIAH2, S100B, Abl gene, ARHGDIB, SHB, PIK3R1, PRKCQ,
Grb2, MAPK1, Syk, Linker of activated T cells, Cbl gene
and EZH2. Vav proteins are involved in several processes
that require cytoskeletal reorganization, such as the
formation of the immunological synapse (IS),
phagocytosis, platelet aggregation, spreading, and
transformation. Vavs function as guanine nucleotide
exchange factors (GEFs) for the Rho/Rac family of
GTPases. Vav family members have several conserved
motifs/domains including: a leucine-rich region, a
leucine-zipper, a calponin homology (CH) domain, an
acidic domain, a Dbl-homology (DH) domain, a pleckstrin
homology (PH) domain, a cysteine-rich domain, 2 SH3
domains, a proline-rich region, and a SH2 domain. Vavs
are the only known Rho GEFs that have both the DH/PH
motifs and SH2/SH3 domains in the same protein. The
leucine-rich helix-loop-helix (HLH) domain is thought to
be involved in protein heterodimerization with other HLH
proteins and it may function as a negative regulator by
forming inactive heterodimers. The CH domain is usually
involved in the association with filamentous actin, but
in Vav it controls NFAT stimulation, Ca2+ mobilization,
and its transforming activity. Acidic domains are
involved in protein-protein interactions and contain
regulatory tyrosines. The DH domain is a GDP-GTP
exchange factor on Rho/Rac GTPases. The PH domain in
involved in interactions with GTP-binding proteins,
lipids and/or phosphorylated serine/threonine residues.
The SH3 domain is involved in localization of proteins
to specific sites within the cell interacting with
protein with proline-rich sequences. The SH2 domain
mediates a high affinity interaction with tyrosine
phosphorylated proteins. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 50.8 bits (121), Expect = 8e-08
Identities = 27/81 (33%), Positives = 42/81 (51%), Gaps = 2/81 (2%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLYTI 721
WY R+ AE +L SDG +LVR D + + IS + ++KH +I LY I
Sbjct: 7 WYAGPMERAGAESILAN-RSDGTYLVRQRVKDAAEFAISIKYNVEVKHIKIMTAEGLYRI 65
Query: 722 GTTQ-FESLVELISYYERHPL 741
+ F L EL+ +Y+++ L
Sbjct: 66 TEKKAFRGLTELVEFYQQNSL 86
Score = 46.9 bits (111), Expect = 2e-06
Identities = 31/101 (30%), Positives = 49/101 (48%), Gaps = 9/101 (8%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W+ G + RA AE +L S DGT+LVR+ ++++S + V H +I +
Sbjct: 7 WYAGPME--RAGAESILANRS---DGTYLVRQRVKDAAEFAISIKYNVEVKHIKIMT--A 59
Query: 563 SGQFYLVEKSYFDSLYSLISHYRTNHLRS--QEFLITLQEP 601
G + + EK F L L+ Y+ N L+ + TLQ P
Sbjct: 60 EGLYRITEKKAFRGLTELVEFYQQNSLKDCFKSLDTTLQFP 100
>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 = 49.2 bits (117), Expect = 8e-08
Identities = 26/55 (47%), Positives = 35/55 (63%), Gaps = 2/55 (3%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTR-AEGGWWRGDYGGKRMHWFPSNYVAE 839
T KA YD+ AR+ ELS + II + + + GWWRG+ G R+ WFP+NYV E
Sbjct: 1 TAKARYDFCARDRSELSLKEGDIIKILNKKGQQGWWRGEIYG-RVGWFPANYVEE 54
>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 = 48.8 bits (117), Expect = 1e-07
Identities = 21/57 (36%), Positives = 30/57 (52%), Gaps = 6/57 (10%)
Query: 787 VKALYDYQARNDD-ELSFPKHAII-----SNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ALYD+ N + ELS K I+ ++ + WW+G R+ WFPSNYV
Sbjct: 2 CRALYDFTPENPEMELSLKKGDIVAVLSKTDPLGRDSEWWKGRTRDGRIGWFPSNYV 58
>gnl|CDD|198260 cd10397, SH2_Tec_Btk, Src homology 2 (SH2) domain found in Tec
protein, Bruton's tyrosine kinase (Btk). A member of
the Tec protein tyrosine kinase Btk is expressed in bone
marrow, spleen, all hematopoietic cells except T
lymphocytes and plasma cells where it plays a crucial
role in B cell maturation and mast cell activation. Btk
has been shown to interact with GNAQ, PLCG2, protein
kinase D1, B-cell linker, SH3BP5, caveolin 1, ARID3A,
and GTF2I. Most of the Tec family members have a PH
domain (Txk and the short (type 1) splice variant of
Drosophila Btk29A are exceptions), a Tec homology (TH)
domain, a SH3 domain, a SH2 domain, and a protein kinase
catalytic domain. Btk is implicated in the primary
immunodeficiency disease X-linked agammaglobulinemia
(Bruton's agammaglobulinemia). The TH domain consists
of a Zn2+-binding Btk motif and a proline-rich region.
The Btk motif is found in Tec kinases, Ras GAP, and
IGBP. It is crucial for the function of Tec PH domains
and it's lack of presence in Txk is not surprising since
it lacks a PH domain. The type 1 splice form of the
Drosophila homolog also lacks both the PH domain and the
Btk motif. The proline-rich regions are highly
conserved for the most part with the exception of Bmx
whose residues surrounding the PXXP motif are not
conserved (TH-like) and Btk29A which is entirely unique
with large numbers of glycine residues (TH-extended).
Tec family members all lack a C-terminal tyrosine having
an autoinhibitory function in its phosphorylated state.
Two tyrosine phosphorylation (pY) sites have been
identified in Btk: one located in the activation loop of
the catalytic domain which regulates the transition
between open (active) and closed (inactive) states and
the other in its SH3 domain. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 106
Score = 50.2 bits (120), Expect = 1e-07
Identities = 33/106 (31%), Positives = 51/106 (48%), Gaps = 9/106 (8%)
Query: 655 NQHEDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAED------KIK 708
+ E EWY TRSQAE LL++ +G F+VR S + Y +S A+ I+
Sbjct: 1 DSLEMYEWYSKNMTRSQAEQLLKQEGKEGGFIVRDS-SKAGKYTVSVFAKSAGDPQGVIR 59
Query: 709 HCRIRV--EGRLYTIGTTQFESLVELISYYERHPLYKKIELWYPVS 752
H + + + Y F ++ ELI+Y++ + L YPVS
Sbjct: 60 HYVVCSTPQSQYYLAEKHLFSTIPELINYHQHNAAGLISRLKYPVS 105
Score = 46.8 bits (111), Expect = 2e-06
Identities = 27/82 (32%), Positives = 47/82 (57%), Gaps = 10/82 (12%)
Query: 512 RAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFW------WQGRVNHCRIRSKPESGQ 565
R++AE LL++ +G F+VR+S + G Y++S + QG + H + S P Q
Sbjct: 15 RSQAEQLLKQEGK--EGGFIVRDS-SKAGKYTVSVFAKSAGDPQGVIRHYVVCSTP-QSQ 70
Query: 566 FYLVEKSYFDSLYSLISHYRTN 587
+YL EK F ++ LI++++ N
Sbjct: 71 YYLAEKHLFSTIPELINYHQHN 92
Score = 42.5 bits (100), Expect = 6e-05
Identities = 17/36 (47%), Positives = 22/36 (61%)
Query: 606 NQHEDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPS 641
+ E EWY TRSQAE LL++ +G F+VR S
Sbjct: 1 DSLEMYEWYSKNMTRSQAEQLLKQEGKEGGFIVRDS 36
>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 = 48.5 bits (116), Expect = 2e-07
Identities = 21/52 (40%), Positives = 27/52 (51%), Gaps = 1/52 (1%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
K L+ Y +N+DEL I + E GWW G GK + FPSN+V E
Sbjct: 3 KVLFSYTPQNEDELELKVGDTIEVLGEVEEGWWEGKLNGK-VGVFPSNFVKE 53
>gnl|CDD|198199 cd09946, SH2_HSH2_like, Src homology 2 domain found in
hematopoietic SH2 (HSH2) protein. HSH2 is thought to
function as an adapter protein involved in tyrosine
kinase signaling. It may also be involved in regulating
cytokine signaling and cytoskeletal reorganization in
hematopoietic cells. HSH2 contains several putative
protein-binding motifs, SH3-binding proline-rich
regions, and phosphotyrosine sites, but lacks enzymatic
motifs. HSH2 was found to interact with
cytokine-regulated tyrosine kinase c-FES and an
activated Cdc42-associated tyrosine kinase ACK1. HSH2
binds c-FES through both its C-terminal region and its
N-terminal region including the SH2 domain and binds
ACK1 via its N-terminal proline-rich region. Both
kinases bound and tyrosine-phosphorylated HSH2 in
mammalian cells. In general SH2 domains are involved in
signal transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 102
Score = 49.9 bits (119), Expect = 2e-07
Identities = 25/90 (27%), Positives = 50/90 (55%), Gaps = 5/90 (5%)
Query: 661 EWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRV--EGRL 718
EW+H +R AE++L P G+FL+R S + + Y +S++A+ +H +++ +G
Sbjct: 8 EWFHGAISREAAENMLESQPL-GSFLIRVSHS-HVGYTLSYKAQSSCRHFMVKLLDDGTF 65
Query: 719 YTIGT-TQFESLVELISYYERHPLYKKIEL 747
G SL L++++++ P+ + EL
Sbjct: 66 MIPGEKVAHTSLHALVTFHQQKPIEPRREL 95
Score = 46.8 bits (111), Expect = 2e-06
Identities = 29/97 (29%), Positives = 52/97 (53%), Gaps = 8/97 (8%)
Query: 502 KWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKP 561
+WFHG +S R AE++L G+FL+R S + +G Y+LS+ Q H ++
Sbjct: 8 EWFHGAIS--REAAENMLESQPL---GSFLIRVSHSHVG-YTLSYKAQSSCRHFMVKLLD 61
Query: 562 ESGQFYLV-EKSYFDSLYSLISHYRTNHLRSQEFLIT 597
+ G F + EK SL++L++ ++ + + L+T
Sbjct: 62 D-GTFMIPGEKVAHTSLHALVTFHQQKPIEPRRELLT 97
Score = 32.6 bits (74), Expect = 0.18
Identities = 13/32 (40%), Positives = 20/32 (62%), Gaps = 1/32 (3%)
Query: 612 EWYHPTATRSQAEDLLRRVPSDGAFLVRPSEN 643
EW+H +R AE++L P G+FL+R S +
Sbjct: 8 EWFHGAISREAAENMLESQPL-GSFLIRVSHS 38
>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 = 48.3 bits (115), Expect = 2e-07
Identities = 22/53 (41%), Positives = 33/53 (62%), Gaps = 3/53 (5%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEG--GWWRGDYGGKRMHWFPSNYVA 838
KAL+ Y+ N+DEL F + II +++ G GWW+G+ GK FP N+V+
Sbjct: 5 KALFHYEGTNEDELDFKEGEIILIISKDTGEPGWWKGELNGKE-GVFPDNFVS 56
>gnl|CDD|212723 cd11789, SH3_Nebulin_family_C, C-terminal Src Homology 3 domain of
the Nebulin family of proteins. Nebulin family proteins
contain multiple nebulin repeats, and may contain an
N-terminal LIM domain and/or a C-terminal SH3 domain.
They have molecular weights ranging from 34 to 900 kD,
depending on the number of nebulin repeats, and they all
bind actin. They are involved in the regulation of actin
filament architecture and function as stabilizers and
scaffolds for cytoskeletal structures with which they
associate, such as long actin filaments or focal
adhesions. Nebulin family proteins that contain a
C-terminal SH3 domain include the giant filamentous
protein nebulin, nebulette, Lasp1, and Lasp2. Lasp2,
also called LIM-nebulette, is an alternatively spliced
variant of nebulette. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 48.1 bits (115), Expect = 2e-07
Identities = 22/55 (40%), Positives = 30/55 (54%), Gaps = 5/55 (9%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDY---GGKRMHWFPSNYV 837
+A+YDY A +DDE+SF + +I NV + GW G G M P+NYV
Sbjct: 1 RYRAMYDYAAADDDEVSFQEGDVIINVEIIDDGWMEGTVQRTGQSGM--LPANYV 53
>gnl|CDD|212789 cd11855, SH3_Sho1p, Src homology 3 domain of High osmolarity
signaling protein Sho1p. Sho1p (or Sho1), also called
SSU81 (Suppressor of SUA8-1 mutation), is a yeast
membrane protein that regulates adaptation to high salt
conditions by activating the HOG (high-osmolarity
glycerol) pathway. High salt concentrations lead to the
localization to the membrane of the MAPKK Pbs2, which is
then activated by the MAPKK Ste11 and in turn, activates
the MAPK Hog1. Pbs2 is localized to the membrane though
the interaction of its PxxP motif with the SH3 domain of
Sho1p. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 47.8 bits (114), Expect = 2e-07
Identities = 21/55 (38%), Positives = 26/55 (47%), Gaps = 3/55 (5%)
Query: 786 TVKALYDYQARNDD--ELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVA 838
+ALY Y A DD ELSF K I+ V+ G WW+ PSNY+
Sbjct: 1 RARALYPYDASPDDPNELSFEKGEIL-EVSDTSGKWWQARKSNGETGICPSNYLQ 54
>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 = 47.9 bits (114), Expect = 3e-07
Identities = 24/56 (42%), Positives = 30/56 (53%), Gaps = 3/56 (5%)
Query: 784 SITVKALYDYQARNDDELSFPKHAIIS--NVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ +ALY ++ARN DE+SF II T E GW G + G WFP NYV
Sbjct: 1 LVNYRALYPFEARNHDEMSFNAGDIIQVDEKTVGEPGWLYGSFQGNF-GWFPCNYV 55
>gnl|CDD|198221 cd10358, SH2_PTK6_Brk, Src homology 2 domain found in
protein-tyrosine kinase-6 (PTK6) which is also known as
breast tumor kinase (Brk). Human protein-tyrosine
kinase-6 (PTK6, also known as breast tumor kinase (Brk))
is a member of the non-receptor protein-tyrosine kinase
family and is expressed in two-thirds of all breast
tumors. PTK6 (9). PTK6 contains a SH3 domain, a SH2
domain, and catalytic domains. For the case of the
non-receptor protein-tyrosine kinases, the SH2 domain is
typically involved in negative regulation of kinase
activity by binding to a phosphorylated tyrosine residue
near to the C terminus. The C-terminal sequence of PTK6
(PTSpYENPT where pY is phosphotyrosine) is thought to be
a self-ligand for the SH2 domain. The structure of the
SH2 domain resembles other SH2 domains except for a
centrally located four-stranded antiparallel beta-sheet
(strands betaA, betaB, betaC, and betaD). There are also
differences in the loop length which might be
responsible for PTK6 ligand specificity. There are two
possible means of regulation of PTK6: autoinhibitory
with the phosphorylation of Tyr playing a role in its
negative regulation and autophosphorylation at this
site, though it has been shown that PTK6 might
phosphorylate signal transduction-associated proteins
Sam68 and signal transducing adaptor family member 2
(STAP/BKS) in vivo. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 100
Score = 49.4 bits (117), Expect = 3e-07
Identities = 31/92 (33%), Positives = 48/92 (52%), Gaps = 3/92 (3%)
Query: 662 WYHPTATRSQAEDLLR-RVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI--RVEGRL 718
W+ +RS+A L+ + GAFL+R SE ++ YV+S R ++H +I R GRL
Sbjct: 4 WFFGCISRSEAVRRLQAEGNATGAFLIRVSEKPSADYVLSVRDTQAVRHYKIWRRAGGRL 63
Query: 719 YTIGTTQFESLVELISYYERHPLYKKIELWYP 750
+ F SL EL++Y+ L + L P
Sbjct: 64 HLNEAVSFLSLPELVNYHRAQSLSHGLRLAAP 95
Score = 37.4 bits (86), Expect = 0.004
Identities = 31/89 (34%), Positives = 44/89 (49%), Gaps = 4/89 (4%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSK 560
E WF G +S R+EA L+ + G FL+R SE DY LS V H +I +
Sbjct: 2 EPWFFGCIS--RSEAVRRLQAEGN-ATGAFLIRVSEKPSADYVLSVRDTQAVRHYKIWRR 58
Query: 561 PESGQFYLVEKSYFDSLYSLISHYRTNHL 589
G+ +L E F SL L++++R L
Sbjct: 59 AG-GRLHLNEAVSFLSLPELVNYHRAQSL 86
>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 = 47.6 bits (113), Expect = 3e-07
Identities = 19/52 (36%), Positives = 34/52 (65%), Gaps = 3/52 (5%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTR--AEGGWWRGDYGGKRMHWFPSNYV 837
K L+ Y+A+N+DEL+ + I++ +++ + GWW G+ G+R FP N+V
Sbjct: 3 KVLFPYEAQNEDELTIKEGDIVTLISKDCIDAGWWEGELNGRR-GVFPDNFV 53
>gnl|CDD|199830 cd10349, SH2_SH2D2A_SH2D7, Src homology 2 domain found in the SH2
domain containing protein 2A and 7 (SH2D2A and SH2D7).
SH2D2A and SH7 both contain a single SH2 domain. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 77
Score = 48.3 bits (115), Expect = 3e-07
Identities = 22/78 (28%), Positives = 41/78 (52%), Gaps = 5/78 (6%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI-RVEGRLYT 720
W+H TR +AE LL P G +LVR SE+ ++V+S+R+ +H + ++ +
Sbjct: 2 WFHGFITRREAERLLEPKPQ-GCYLVRFSES-AVTFVLSYRSRTCCRHFLLAQLRDGRHV 59
Query: 721 IG--TTQFESLVELISYY 736
+ + L +L+ +Y
Sbjct: 60 VLGEDSAHARLQDLLLHY 77
Score = 32.5 bits (74), Expect = 0.11
Identities = 15/30 (50%), Positives = 18/30 (60%), Gaps = 1/30 (3%)
Query: 613 WYHPTATRSQAEDLLRRVPSDGAFLVRPSE 642
W+H TR +AE LL P G +LVR SE
Sbjct: 2 WFHGFITRREAERLLEPKPQ-GCYLVRFSE 30
>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 = 47.5 bits (113), Expect = 3e-07
Identities = 19/49 (38%), Positives = 27/49 (55%), Gaps = 1/49 (2%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNY 836
+ALYD+ N+DELSF II+ + + W G+ GK FP N+
Sbjct: 3 RALYDFTGENEDELSFKAGDIITELESIDEEWMSGELRGKS-GIFPKNF 50
>gnl|CDD|198262 cd10399, SH2_Tec_Bmx, Src homology 2 (SH2) domain found in Tec
protein, Bmx. A member of the Tec protein tyrosine
kinase Bmx is expressed in the endothelium of large
arteries, fetal endocardium, adult endocardium of the
left ventricle, bone marrow, lung, testis, granulocytes,
myeloid cell lines, and prostate cell lines. Bmx is
involved in the regulation of Rho and serum response
factor (SRF). Bmx has been shown to interact with PAK1,
PTK2, PTPN21, and RUFY1. Most of the Tec family members
have a PH domain (Txk and the short (type 1) splice
variant of Drosophila Btk29A are exceptions), a Tec
homology (TH) domain, a SH3 domain, a SH2 domain, and a
protein kinase catalytic domain. The TH domain consists
of a Zn2+-binding Btk motif and a proline-rich region.
The Btk motif is found in Tec kinases, Ras GAP, and
IGBP. It is crucial for the function of Tec PH domains.
It is not present in Txk and the type 1 splice form of
the Drosophila homolog. The proline-rich regions are
highly conserved for the most part with the exception of
Bmx whose residues surrounding the PXXP motif are not
conserved (TH-like) and Btk29A which is entirely unique
with large numbers of glycine residues (TH-extended).
Tec family members all lack a C-terminal tyrosine having
an autoinhibitory function in its phosphorylated state.
In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 106
Score = 49.2 bits (117), Expect = 3e-07
Identities = 30/93 (32%), Positives = 51/93 (54%), Gaps = 12/93 (12%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWW------QGRVNH 554
WF G +S R+++E LLR+ +G F+VR S + +G Y++S + +G V H
Sbjct: 6 YDWFAGNIS--RSQSEQLLRQKGK--EGAFMVRNS-SQVGMYTVSLFSKAVNDKKGTVKH 60
Query: 555 CRIRSKPESGQFYLVEKSYFDSLYSLISHYRTN 587
+ + E+ + YL E FDS+ LI +++ N
Sbjct: 61 YHVHTNAEN-KLYLAENYCFDSIPKLIHYHQHN 92
Score = 45.3 bits (107), Expect = 7e-06
Identities = 31/102 (30%), Positives = 51/102 (50%), Gaps = 7/102 (6%)
Query: 658 EDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDN--SSYVISFRAEDK---IKHCRI 712
+ +W+ +RSQ+E LLR+ +GAF+VR S + + S DK +KH +
Sbjct: 4 DAYDWFAGNISRSQSEQLLRQKGKEGAFMVRNSSQVGMYTVSLFSKAVNDKKGTVKHYHV 63
Query: 713 RV--EGRLYTIGTTQFESLVELISYYERHPLYKKIELWYPVS 752
E +LY F+S+ +LI Y++ + L +PVS
Sbjct: 64 HTNAENKLYLAENYCFDSIPKLIHYHQHNSAGMITRLRHPVS 105
Score = 34.9 bits (80), Expect = 0.027
Identities = 14/33 (42%), Positives = 22/33 (66%)
Query: 609 EDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPS 641
+ +W+ +RSQ+E LLR+ +GAF+VR S
Sbjct: 4 DAYDWFAGNISRSQSEQLLRQKGKEGAFMVRNS 36
>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 = 47.1 bits (112), Expect = 4e-07
Identities = 21/52 (40%), Positives = 28/52 (53%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
TV ALYDY A DEL+ + II + + WW G + +FP+NYV
Sbjct: 1 TVVALYDYTANRSDELTIHRGDIIRVLYKDNDNWWFGSLVNGQQGYFPANYV 52
>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 = 46.9 bits (112), Expect = 4e-07
Identities = 19/53 (35%), Positives = 31/53 (58%), Gaps = 1/53 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
V+ALYD+ + EL F + II+ + ++ WW+G+ G+ FP+NYV
Sbjct: 2 VQALYDFNPQEPGELEFRRGDIITVLDSSDPDWWKGELRGRV-GIFPANYVQP 53
>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 = 46.9 bits (111), Expect = 5e-07
Identities = 24/52 (46%), Positives = 32/52 (61%), Gaps = 2/52 (3%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTR-AEGGWWRGDYGGKRMHWFPSNYVAE 839
A YD+ AR+ ELS K ++ T+ + GWWRG+ G R+ WFPS YV E
Sbjct: 5 ARYDFCARDMRELSLLKGDVVKIYTKMSTNGWWRGEVNG-RVGWFPSTYVEE 55
>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 = 46.9 bits (112), Expect = 5e-07
Identities = 20/55 (36%), Positives = 27/55 (49%), Gaps = 4/55 (7%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMH----WFPSNY 836
V ALYD+ ++ ++LSF II + + GWW G WFPSNY
Sbjct: 1 VVVALYDFTPKSKNQLSFKAGDIIYVLNKDPSGWWDGVIISSSGKVKRGWFPSNY 55
>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 = 46.6 bits (111), Expect = 6e-07
Identities = 22/52 (42%), Positives = 32/52 (61%), Gaps = 2/52 (3%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVT-RAEGGWWRGDYGGKRMHWFPSNYV 837
V+ALYDY+ + DELSF I++ + E GW +G G R+ +P+NYV
Sbjct: 2 VRALYDYEGQESDELSFKAGDILTKLEEEDEQGWCKGRLDG-RVGLYPANYV 52
>gnl|CDD|241518 cd13364, PH_PLC_eta, Phospholipase C-eta (PLC-eta) pleckstrin
homology (PH) domain. PLC-eta (PLCeta) consists of two
enzymes, PLCeta1 and PLCeta2. They hydrolyze
phosphatidylinositol 4,5-bisphosphate, are more
sensitive to Ca2+ than other PLC isozymes, and involved
in PKC activation in the brain and neuroendocrine
systems. PLC-eta consists of an N-terminal PH domain, a
EF hand domain, a catalytic domain split into X and Y
halves by a variable linker, a C2 domain, and a
C-terminal PDZ domain. PLCs (EC 3.1.4.3) play a role in
the initiation of cellular activation, proliferation,
differentiation and apoptosis. They are central to
inositol lipid signalling pathways, facilitating
intracellular Ca2+ release and protein kinase C (PKC)
activation. Specificaly, PLCs catalyze the cleavage of
phosphatidylinositol-4,5-bisphosphate (PIP2) and result
in the release of 1,2-diacylglycerol (DAG) and inositol
1,4,5-triphosphate (IP3). These products trigger the
activation of protein kinase C (PKC) and the release of
Ca2+ from intracellular stores. There are fourteen kinds
of mammalian phospholipase C proteins which are are
classified into six isotypes (beta, gamma, delta,
epsilon, zeta, eta). PH domains have diverse functions,
but in general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.involved in targeting proteins to the
plasma membrane, but only a few (less than 10%) display
strong specificity in binding inositol phosphates. Any
specificity is usually determined by loop regions or
insertions in the N-terminus of the domain, which are
not conserved across all PH domains. PH domains are
found in cellular signaling proteins such as
serine/threonine kinases, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors,
cytoskeletal associated molecules, and in lipid
associated enzymes.
Length = 108
Score = 48.4 bits (116), Expect = 6e-07
Identities = 25/71 (35%), Positives = 40/71 (56%), Gaps = 4/71 (5%)
Query: 28 KDEVDMREVKEVRVGKCFKDFDRWPEESGRVDAARCFIVLYGSEFKLKTLSIAAFSEKEC 87
K ++ + ++EVR GK + F SG D CF ++YG ++ +L + A S E
Sbjct: 41 KAKIPIDSIREVREGKNTEIFRS--HASGNFDEECCFSIIYGDNYE--SLDLVASSPDEA 96
Query: 88 GLWVTGLRYLV 98
+W+TGLRYL+
Sbjct: 97 NIWITGLRYLM 107
>gnl|CDD|198265 cd10402, SH2_C-SH2_Zap70, C-terminal Src homology 2 (SH2) domain
found in Zeta-chain-associated protein kinase 70
(ZAP-70). ZAP-70 and Syk comprise a family of
hematopoietic cell specific protein tyrosine kinases
(PTKs) that are required for antigen and antibody
receptor function. ZAP-70 is expressed in T and natural
killer (NK) cells and Syk is expressed in B cells, mast
cells, polymorphonuclear leukocytes, platelets,
macrophages, and immature T cells. They are required for
the proper development of T and B cells, immune
receptors, and activating NK cells. They consist of two
N-terminal Src homology 2 (SH2) domains and a C-terminal
kinase domain separated from the SH2 domains by a linker
or hinge region. Phosphorylation of both tyrosine
residues within the Immunoreceptor Tyrosine-based
Activation Motifs (ITAM; consensus sequence
Yxx[LI]x(7,8)Yxx[LI]) by the Src-family PTKs is required
for efficient interaction of ZAP-70 and Syk with the
receptor subunits and for receptor function. ZAP-70
forms two phosphotyrosine binding pockets, one of which
is shared by both SH2 domains. In Syk the two SH2
domains do not form such a phosphotyrosine-binding site.
The SH2 domains here are believed to function
independently. In addition, the two SH2 domains of Syk
display flexibility in their relative orientation,
allowing Syk to accommodate a greater variety of spacing
sequences between the ITAM phosphotyrosines and singly
phosphorylated non-classical ITAM ligands. This model
contains the C-terminus SH2 domains of Zap70. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 105
Score = 48.4 bits (115), Expect = 6e-07
Identities = 33/101 (32%), Positives = 55/101 (54%), Gaps = 8/101 (7%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W+HG ++ R EAE L + DG FL+RE + G Y+LS + V H RI + +
Sbjct: 12 WYHGSIA--RDEAERRLYSGAQ-PDGKFLLRERKE-SGTYALSLVYGKTVYHYRI-DQDK 66
Query: 563 SGQFYLVEKSYFDSLYSLISHYRTNHLRSQEFLITLQEPVP 603
SG++ + E + FD+L+ L+ + + L+ + L+E P
Sbjct: 67 SGKYSIPEGTKFDTLWQLVEYLK---LKPDGLIFVLRESCP 104
Score = 40.3 bits (94), Expect = 4e-04
Identities = 28/90 (31%), Positives = 45/90 (50%), Gaps = 10/90 (11%)
Query: 657 HEDKEWYHPTATRSQAEDLLRRVPS----DGAFLVRPSENDNSSYVISFRAEDKIKHCRI 712
HE WYH + R +AE RR+ S DG FL+R ++ +Y +S + H RI
Sbjct: 7 HERMPWYHGSIARDEAE---RRLYSGAQPDGKFLLRE-RKESGTYALSLVYGKTVYHYRI 62
Query: 713 RVE--GRLYTIGTTQFESLVELISYYERHP 740
+ G+ T+F++L +L+ Y + P
Sbjct: 63 DQDKSGKYSIPEGTKFDTLWQLVEYLKLKP 92
Score = 31.4 bits (71), Expect = 0.46
Identities = 16/37 (43%), Positives = 20/37 (54%), Gaps = 7/37 (18%)
Query: 608 HEDKEWYHPTATRSQAEDLLRRVPS----DGAFLVRP 640
HE WYH + R +AE RR+ S DG FL+R
Sbjct: 7 HERMPWYHGSIARDEAE---RRLYSGAQPDGKFLLRE 40
>gnl|CDD|198180 cd09926, SH2_CRK_like, Src homology 2 domain found in
cancer-related signaling adaptor protein CRK. SH2
domain in the CRK proteins. CRKI (SH2-SH3) and CRKII
(SH2-SH3-SH3) are splicing isoforms of the oncoprotein
CRK. CRKs regulate transcription and cytoskeletal
reorganization for cell growth and motility by linking
tyrosine kinases to small G proteins. The SH2 domain of
CRK associates with tyrosine-phosphorylated receptors or
components of focal adhesions, such as p130Cas and
paxillin. CRK transmits signals to small G proteins
through effectors that bind its SH3 domain, such as C3G,
the guanine-nucleotide exchange factor (GEF) for Rap1
and R-Ras, and DOCK180, the GEF for Rac6. The binding of
p130Cas to the CRK-C3G complex activates Rap1, leading
to regulation of cell adhesion, and activates R-Ras,
leading to JNK-mediated activation of cell
proliferation, whereas the binding of CRK DOCK180
induces Rac1-mediated activation of cellular migration.
The activity of the different splicing isoforms varies
greatly with CRKI displaying substantial transforming
activity, CRKII less so, and phosphorylated CRKII with
no biological activity whatsoever. CRKII has a linker
region with a phosphorylated Tyr and an additional
C-terminal SH3 domain. The phosphorylated Tyr creates a
binding site for its SH2 domain which disrupts the
association between CRK and its SH2 target proteins. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 106
Score = 48.2 bits (115), Expect = 6e-07
Identities = 36/105 (34%), Positives = 51/105 (48%), Gaps = 12/105 (11%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRI---RS 559
W+ G +S R EA++LL+ H G FLVR+S T GDY LS RV+H I
Sbjct: 9 WYFGPMS--RQEAQELLQGQRH---GVFLVRDSSTIPGDYVLSVSENSRVSHYIINSLGQ 63
Query: 560 KPESGQFYLVEKSYFDSLYSLISHYRTNHLRSQEFLITLQEPVPQ 604
+ Y + FD L +L+ Y+ ++L TL EP +
Sbjct: 64 PAPNQSRYRIGDQEFDDLPALLEFYKLHYL----DTTTLIEPASR 104
Score = 37.1 bits (86), Expect = 0.005
Identities = 26/86 (30%), Positives = 39/86 (45%), Gaps = 7/86 (8%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI------RVE 715
WY +R +A++LL+ G FLVR S YV+S ++ H I
Sbjct: 9 WYFGPMSRQEAQELLQG-QRHGVFLVRDSSTIPGDYVLSVSENSRVSHYIINSLGQPAPN 67
Query: 716 GRLYTIGTTQFESLVELISYYERHPL 741
Y IG +F+ L L+ +Y+ H L
Sbjct: 68 QSRYRIGDQEFDDLPALLEFYKLHYL 93
>gnl|CDD|198250 cd10387, SH2_SOCS6, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 100
Score = 47.9 bits (114), Expect = 6e-07
Identities = 28/76 (36%), Positives = 37/76 (48%), Gaps = 5/76 (6%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLYTI 721
WY TR +AE L VP DG+FLVR S +D +SFR+ K H RI ++
Sbjct: 12 WYWGPITRWEAEGKLANVP-DGSFLVRDSSDDRYLLSLSFRSHGKTLHTRIEHSNGRFSF 70
Query: 722 ----GTTQFESLVELI 733
S+V+LI
Sbjct: 71 YEQPDVEGHTSIVDLI 86
Score = 41.4 bits (97), Expect = 2e-04
Identities = 25/82 (30%), Positives = 37/82 (45%), Gaps = 6/82 (7%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W+ G ++ AE + +++ DG+FLVR+S SLSF G+ H RI
Sbjct: 12 WYWGPITRWEAE-----GKLANVPDGSFLVRDSSDDRYLLSLSFRSHGKTLHTRIEHSNG 66
Query: 563 SGQFY-LVEKSYFDSLYSLISH 583
FY + S+ LI H
Sbjct: 67 RFSFYEQPDVEGHTSIVDLIEH 88
Score = 34.8 bits (80), Expect = 0.027
Identities = 17/32 (53%), Positives = 20/32 (62%), Gaps = 1/32 (3%)
Query: 613 WYHPTATRSQAEDLLRRVPSDGAFLVRPSEND 644
WY TR +AE L VP DG+FLVR S +D
Sbjct: 12 WYWGPITRWEAEGKLANVP-DGSFLVRDSSDD 42
>gnl|CDD|198254 cd10391, SH2_SHE, Src homology 2 domain found in SH2
domain-containing adapter protein E (SHE). SHE is
expressed in heart, lung, brain, and skeletal muscle.
SHE contains two pTry protein binding domains, protein
interaction domain (PID) and a SH2 domain, followed by a
glycine-proline rich region, all of which are N-terminal
to the phosphotyrosine binding (PTB) domain. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 98
Score = 47.6 bits (113), Expect = 8e-07
Identities = 30/97 (30%), Positives = 53/97 (54%), Gaps = 8/97 (8%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI-RVEGRLYT 720
WYH + +R++AE L+ + ++LVR SE+ NS Y I+ + H + + + YT
Sbjct: 3 WYHGSISRAEAESRLQPCK-EASYLVRNSESGNSKYSIALKTSQGCVHIIVAQTKDNKYT 61
Query: 721 IGTTQ--FESLVELISYY--ERHPL--YKKIELWYPV 751
+ T F+S+ E++ YY E+ P + + L +PV
Sbjct: 62 LNQTSAVFDSIPEVVHYYSNEKLPFKGAEHMTLLHPV 98
Score = 38.8 bits (90), Expect = 0.001
Identities = 15/36 (41%), Positives = 24/36 (66%), Gaps = 1/36 (2%)
Query: 613 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSY 648
WYH + +R++AE L+ + ++LVR SE+ NS Y
Sbjct: 3 WYHGSISRAEAESRLQPCK-EASYLVRNSESGNSKY 37
Score = 36.9 bits (85), Expect = 0.005
Identities = 33/106 (31%), Positives = 56/106 (52%), Gaps = 12/106 (11%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSF-WWQGRVNHCRIRS 559
+ W+HG +S RAEAE L+ + ++LVR SE+ YS++ QG V+ I +
Sbjct: 1 QPWYHGSIS--RAEAESRLQPCK---EASYLVRNSESGNSKYSIALKTSQGCVH--IIVA 53
Query: 560 KPESGQFYLVEKS-YFDSLYSLISHYRTNHL--RSQEFLITLQEPV 602
+ + ++ L + S FDS+ ++ +Y L + E +TL PV
Sbjct: 54 QTKDNKYTLNQTSAVFDSIPEVVHYYSNEKLPFKGAEH-MTLLHPV 98
>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 = 46.3 bits (111), Expect = 9e-07
Identities = 19/53 (35%), Positives = 32/53 (60%), Gaps = 1/53 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
+ ++DY A + +ELS K ++ + + + GWW G+ GG+R PS+YV E
Sbjct: 2 GRVIFDYVATDPNELSLKKGDVVKVLDKDDNGWWEGERGGRR-GLVPSSYVEE 53
>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 = 46.0 bits (109), Expect = 1e-06
Identities = 18/52 (34%), Positives = 28/52 (53%), Gaps = 1/52 (1%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
V+AL+D+ + D EL F + I + ++ WW+G G+ FP NYV
Sbjct: 1 YVQALFDFDPQEDGELGFRRGDFIEVMDNSDPNWWKGACHGQ-TGMFPRNYV 51
>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 = 46.0 bits (109), Expect = 1e-06
Identities = 21/56 (37%), Positives = 31/56 (55%), Gaps = 6/56 (10%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEG-----GWWRGDYGGKRMHWFPSNYVAE 839
AL+DY AR +DEL+ + + +++ GWW G G ++ FPSNYVA
Sbjct: 4 ALFDYDARGEDELTLRRGQPVEVLSKDAAVSGDEGWWTGKI-GDKVGIFPSNYVAP 58
>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 = 46.1 bits (109), Expect = 1e-06
Identities = 22/53 (41%), Positives = 28/53 (52%), Gaps = 1/53 (1%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAEI 840
K L++Y +N+DEL II E GWW G GK FPSN+V E+
Sbjct: 4 KVLFEYVPQNEDELELKVGDIIDINEEVEEGWWSGTLNGK-SGLFPSNFVKEL 55
>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 = 45.9 bits (109), Expect = 1e-06
Identities = 18/52 (34%), Positives = 29/52 (55%), Gaps = 3/52 (5%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEG--GWWRGDYGGKRMHWFPSNYV 837
+ L+DY DEL+ K +I +++ GWW G+ G+R +FP N+V
Sbjct: 3 RVLFDYNPVAPDELALKKGDVIEVISKETEDEGWWEGELNGRR-GFFPDNFV 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 = 45.6 bits (108), Expect = 1e-06
Identities = 23/52 (44%), Positives = 31/52 (59%), Gaps = 2/52 (3%)
Query: 791 YDYQARNDDELSFPKHAIISNVTR-AEGGWWRGDYGGKRMHWFPSNYVAEIE 841
YDY A ++DEL+ II NV + E GW G+ G+R FP N+V EI+
Sbjct: 6 YDYDAVHEDELTIRVGEIIRNVKKLEEEGWLEGELNGRR-GMFPDNFVKEIK 56
>gnl|CDD|198252 cd10389, SH2_SHB, Src homology 2 domain found in SH2
domain-containing adapter protein B (SHB). SHB
functions in generating signaling compounds in response
to tyrosine kinase activation. SHB contains proline-rich
motifs, a phosphotyrosine binding (PTB) domain, tyrosine
phosphorylation sites, and a SH2 domain. SHB mediates
certain aspects of platelet-derived growth factor (PDGF)
receptor-, fibroblast growth factor (FGF) receptor-,
neural growth factor (NGF) receptor TRKA-, T cell
receptor-, interleukin-2 (IL-2) receptor- and focal
adhesion kinase- (FAK) signaling. SRC-like FYN-Related
Kinase FRK/RAK (also named BSK/IYK or GTK) and SHB
regulate apoptosis, proliferation and differentiation.
SHB promotes apoptosis and is also required for proper
mitogenicity, spreading and tubular morphogenesis in
endothelial cells. SHB also plays a role in preventing
early cavitation of embryoid bodies and reduces
differentiation to cells expressing albumin, amylase,
insulin and glucagon. SHB is a multifunctional protein
that has difference responses in different cells under
various conditions. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 97
Score = 47.0 bits (111), Expect = 1e-06
Identities = 30/96 (31%), Positives = 47/96 (48%), Gaps = 7/96 (7%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLYTI 721
WYH +R AE+LL R+ + ++LVR S+ Y +S ++ H ++ Y +
Sbjct: 3 WYHGAISRGDAENLL-RLCKECSYLVRNSQTSKHDYSLSLKSNQGFMHMKLAKTKEKYVL 61
Query: 722 GTTQ--FESLVELISYYERHPLYKK----IELWYPV 751
G F+S+ E+I YY L K + L YPV
Sbjct: 62 GQNSPPFDSVPEVIHYYTTRKLPIKGAEHLSLLYPV 97
Score = 37.4 bits (86), Expect = 0.004
Identities = 31/88 (35%), Positives = 47/88 (53%), Gaps = 8/88 (9%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W+HG +S R +AE+LLR + ++LVR S+T DYSLS H ++ E
Sbjct: 3 WYHGAIS--RGDAENLLRLCK---ECSYLVRNSQTSKHDYSLSLKSNQGFMHMKLAKTKE 57
Query: 563 SGQFYLVEKS-YFDSLYSLISHYRTNHL 589
++ L + S FDS+ +I +Y T L
Sbjct: 58 --KYVLGQNSPPFDSVPEVIHYYTTRKL 83
Score = 30.4 bits (68), Expect = 0.83
Identities = 16/44 (36%), Positives = 24/44 (54%), Gaps = 1/44 (2%)
Query: 613 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYEPVPQPNQ 656
WYH +R AE+LL R+ + ++LVR S+ Y + NQ
Sbjct: 3 WYHGAISRGDAENLL-RLCKECSYLVRNSQTSKHDYSLSLKSNQ 45
>gnl|CDD|198270 cd10407, SH2_Vav3, Src homology 2 (SH2) domain found in the Vav3
proteins. Proto-oncogene vav is a member of the Dbl
family of guanine nucleotide exchange factors (GEF) for
the Rho family of GTP binding proteins. All vavs are
activated by tyrosine phosphorylation leading to their
activation. There are three Vav mammalian family
members: Vav1 which is expressed in the hematopoietic
system, and Vav2 and Vav3 are more ubiquitously
expressed. Vav3 preferentially activates RhoA, RhoG and,
to a lesser extent, Rac1. Alternatively spliced
transcript variants encoding different isoforms have
been described for this gene. VAV3 has been shown to
interact with Grb2. Vav proteins are involved in several
processes that require cytoskeletal reorganization, such
as the formation of the immunological synapse (IS),
phagocytosis, platelet aggregation, spreading, and
transformation. Vavs function as guanine nucleotide
exchange factors (GEFs) for the Rho/Rac family of
GTPases. Vav family members have several conserved
motifs/domains including: a leucine-rich region, a
leucine-zipper, a calponin homology (CH) domain, an
acidic domain, a Dbl-homology (DH) domain, a pleckstrin
homology (PH) domain, a cysteine-rich domain, 2 SH3
domains, a proline-rich region, and a SH2 domain. Vavs
are the only known Rho GEFs that have both the DH/PH
motifs and SH2/SH3 domains in the same protein. The
leucine-rich helix-loop-helix (HLH) domain is thought to
be involved in protein heterodimerization with other HLH
proteins and it may function as a negative regulator by
forming inactive heterodimers. The CH domain is usually
involved in the association with filamentous actin, but
in Vav it controls NFAT stimulation, Ca2+ mobilization,
and its transforming activity. Acidic domains are
involved in protein-protein interactions and contain
regulatory tyrosines. The DH domain is a GDP-GTP
exchange factor on Rho/Rac GTPases. The PH domain in
involved in interactions with GTP-binding proteins,
lipids and/or phosphorylated serine/threonine residues.
The SH3 domain is involved in localization of proteins
to specific sites within the cell interacting with
protein with proline-rich sequences. The SH2 domain
mediates a high affinity interaction with tyrosine
phosphorylated proteins. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 46.5 bits (110), Expect = 2e-06
Identities = 29/82 (35%), Positives = 46/82 (56%), Gaps = 4/82 (4%)
Query: 662 WYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRV-EGRLY 719
WY R QAE +L+ RV S +LVR ++ Y IS + +++KH +I +G +
Sbjct: 7 WYAGAMERLQAETELINRVNS--TYLVRHRTKESGEYAISIKYNNEVKHIKILTRDGFFH 64
Query: 720 TIGTTQFESLVELISYYERHPL 741
+F+SL+EL+ YY+ H L
Sbjct: 65 IAENRKFKSLMELVEYYKHHSL 86
Score = 42.7 bits (100), Expect = 5e-05
Identities = 30/104 (28%), Positives = 51/104 (49%), Gaps = 9/104 (8%)
Query: 500 GEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRS 559
+ W+ G + +AE E + R S T+LVR G+Y++S + V H +I +
Sbjct: 4 CQPWYAGAMERLQAETELINRVNS-----TYLVRHRTKESGEYAISIKYNNEVKHIKILT 58
Query: 560 KPESGQFYLVEKSYFDSLYSLISHYRTNHLRS--QEFLITLQEP 601
+ G F++ E F SL L+ +Y+ + L+ + TLQ P
Sbjct: 59 R--DGFFHIAENRKFKSLMELVEYYKHHSLKEGFRSLDTTLQFP 100
>gnl|CDD|198234 cd10371, SH2_Src_Blk, Src homology 2 (SH2) domain found in B
lymphoid kinase (Blk). Blk is a member of the Src
non-receptor type tyrosine kinase family of proteins.
Blk is expressed in the B-cells. Unlike most other Src
members Blk lacks cysteine residues in the SH4 domain
that undergo palmitylation. Blk is required for the
development of IL-17-producing gamma-delta T cells.
Furthermore, Blk is expressed in lymphoid precursors
and, in this capacity, plays a role in regulating thymus
cellularity during ontogeny. Blk has a unique N-terminal
domain, an SH3 domain, an SH2 domain, a kinase domain
and a regulatory tail, as do the other members of the
family. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 100
Score = 46.6 bits (110), Expect = 2e-06
Identities = 33/88 (37%), Positives = 47/88 (53%), Gaps = 8/88 (9%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLS---FWWQGRV-NHCR 556
EKWF + R +AE L + G+FL+RESE+ G +SLS QG V H +
Sbjct: 3 EKWFF--RTISRKDAERQLLAPMNKA-GSFLIRESESNKGAFSLSVKDVTTQGEVVKHYK 59
Query: 557 IRSKPESGQFYLVEKSYFDSLYSLISHY 584
IRS G +Y+ + F +L +L+ HY
Sbjct: 60 IRSLDNGG-YYISPRITFPTLQALVQHY 86
Score = 39.6 bits (92), Expect = 7e-04
Identities = 25/88 (28%), Positives = 45/88 (51%), Gaps = 7/88 (7%)
Query: 658 EDKEWYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNSSYVISFR----AEDKIKHCRI 712
E ++W+ T +R AE LL + G+FL+R SE++ ++ +S + + +KH +I
Sbjct: 1 EVEKWFFRTISRKDAERQLLAPMNKAGSFLIRESESNKGAFSLSVKDVTTQGEVVKHYKI 60
Query: 713 RV--EGRLYTIGTTQFESLVELISYYER 738
R G Y F +L L+ +Y +
Sbjct: 61 RSLDNGGYYISPRITFPTLQALVQHYSK 88
Score = 28.1 bits (62), Expect = 7.8
Identities = 14/41 (34%), Positives = 25/41 (60%), Gaps = 1/41 (2%)
Query: 609 EDKEWYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNSSY 648
E ++W+ T +R AE LL + G+FL+R SE++ ++
Sbjct: 1 EVEKWFFRTISRKDAERQLLAPMNKAGSFLIRESESNKGAF 41
>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 = 44.9 bits (106), Expect = 3e-06
Identities = 20/52 (38%), Positives = 34/52 (65%), Gaps = 3/52 (5%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGD-YGGKRMHWFPSNYV 837
V+A+YD++A D+EL+F II+ + ++ WW+G+ G + FPSN+V
Sbjct: 3 VRAIYDFEAAEDNELTFKAGDIITILDDSDPNWWKGETPQGTGL--FPSNFV 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 = 44.8 bits (106), Expect = 3e-06
Identities = 20/52 (38%), Positives = 31/52 (59%), Gaps = 2/52 (3%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEG-GWWRGDYGGKRMHWFPSNY 836
V+ALYDY+A+ DDE+S I+ + +G GW G+ G + FP++Y
Sbjct: 1 YVEALYDYEAQGDDEISIRVGDRIAVIRGDDGSGWTYGEINGVK-GLFPTSY 51
>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 = 44.4 bits (105), Expect = 3e-06
Identities = 20/52 (38%), Positives = 36/52 (69%), Gaps = 3/52 (5%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRG-DYGGKRMHWFPSNYV 837
V+ALYD++A D+EL+F II+ + ++ WW+G ++ G+ + FP+N+V
Sbjct: 3 VRALYDFEAAEDNELTFKAGEIITVLDDSDPNWWKGSNHRGEGL--FPANFV 52
>gnl|CDD|198276 cd10413, SH2_Grb7, Src homology 2 (SH2) domain found in the growth
factor receptor bound, subclass 7 (Grb7) proteins. The
Grb family binds to the epidermal growth factor receptor
(EGFR, erbB1) via their SH2 domains. Grb7 is part of the
Grb7 family of proteins which also includes Grb10, and
Grb14. They are composed of an N-terminal Proline-rich
domain, a Ras Associating-like (RA) domain, a Pleckstrin
Homology (PH) domain, a phosphotyrosine interaction
region (PIR, BPS) and a C-terminal SH2 domain. The SH2
domains of Grb7, Grb10 and Grb14 preferentially bind to
a different RTK. Grb7 binds strongly to the erbB2
receptor, unlike Grb10 and Grb14 which bind weakly to
it. Grb7 family proteins are phosphorylated on
serine/threonine as well as tyrosine residues. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 108
Score = 46.1 bits (109), Expect = 4e-06
Identities = 28/88 (31%), Positives = 49/88 (55%), Gaps = 7/88 (7%)
Query: 657 HEDKEWYHPTATRSQAEDLL-RRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI--- 712
H + W+H +R +++ L+ ++ DG FLVR S+ + +V+S K+KH I
Sbjct: 2 HRTQPWFHGRISREESQRLIGQQGLVDGVFLVRESQRNPQGFVLSLCHLQKVKHYLILPS 61
Query: 713 RVEGRLYTI---GTTQFESLVELISYYE 737
EGRLY G T+F L++L+ +++
Sbjct: 62 EEEGRLYFSMDDGQTRFTDLLQLVEFHQ 89
Score = 40.7 bits (95), Expect = 3e-04
Identities = 31/94 (32%), Positives = 47/94 (50%), Gaps = 6/94 (6%)
Query: 497 LHFGEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCR 556
+H + WFHGR+S R E++ L+ + L DG FLVRES+ + LS +V H
Sbjct: 1 IHRTQPWFHGRIS--REESQRLIGQQG-LVDGVFLVRESQRNPQGFVLSLCHLQKVKHYL 57
Query: 557 IRSKPESGQFYLVE---KSYFDSLYSLISHYRTN 587
I E G+ Y ++ F L L+ ++ N
Sbjct: 58 ILPSEEEGRLYFSMDDGQTRFTDLLQLVEFHQLN 91
>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 = 23/56 (41%), Positives = 33/56 (58%), Gaps = 3/56 (5%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEG--GWWRGDYGGKRMHWFPSNYVAE 839
T A Y++ AR+ ELS + ++ +R G GWW+G+ G R+ WFPS YV E
Sbjct: 2 TAVARYNFAARDMRELSLREGDVVRIYSRIGGDQGWWKGETNG-RIGWFPSTYVEE 56
>gnl|CDD|198255 cd10392, SH2_SHF, Src homology 2 domain found in SH2
domain-containing adapter protein F (SHF). SHF is
thought to play a role in PDGF-receptor signaling and
regulation of apoptosis. SHF is mainly expressed in
skeletal muscle, brain, liver, prostate, testis, ovary,
small intestine, and colon. SHF contains four putative
tyrosine phosphorylation sites and an SH2 domain. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 98
Score = 45.8 bits (108), Expect = 4e-06
Identities = 30/97 (30%), Positives = 51/97 (52%), Gaps = 8/97 (8%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI-RVEGRLYT 720
WYH +R+ AE+LL R+ + ++LVR SE + + +S ++ H ++ R + Y
Sbjct: 3 WYHGAISRTDAENLL-RLCKEASYLVRNSETSKNDFSLSLKSSQGFMHMKLSRTKEHKYV 61
Query: 721 IG--TTQFESLVELISYYERHPLYKK----IELWYPV 751
+G + F S+ E+I +Y L K + L YPV
Sbjct: 62 LGQNSPPFSSVPEIIHHYASRKLPIKGAEHMSLLYPV 98
Score = 42.4 bits (99), Expect = 6e-05
Identities = 30/88 (34%), Positives = 48/88 (54%), Gaps = 7/88 (7%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W+HG +S R +AE+LLR + ++LVR SET D+SLS H ++ S+ +
Sbjct: 3 WYHGAIS--RTDAENLLRLCK---EASYLVRNSETSKNDFSLSLKSSQGFMHMKL-SRTK 56
Query: 563 SGQFYLVEKS-YFDSLYSLISHYRTNHL 589
++ L + S F S+ +I HY + L
Sbjct: 57 EHKYVLGQNSPPFSSVPEIIHHYASRKL 84
Score = 30.4 bits (68), Expect = 0.86
Identities = 14/36 (38%), Positives = 23/36 (63%), Gaps = 1/36 (2%)
Query: 613 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSY 648
WYH +R+ AE+LL R+ + ++LVR SE + +
Sbjct: 3 WYHGAISRTDAENLL-RLCKEASYLVRNSETSKNDF 37
>gnl|CDD|198251 cd10388, SH2_SOCS7, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 45.8 bits (109), Expect = 4e-06
Identities = 27/81 (33%), Positives = 42/81 (51%), Gaps = 6/81 (7%)
Query: 658 EDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGR 717
+D WY + AE +L P DG+FLVR S +D + +SFR++ + H RI
Sbjct: 8 KDCGWYWGPMSWEDAEKVLSNKP-DGSFLVRDSSDDRYIFSLSFRSQGSVHHTRIEQYQG 66
Query: 718 LYTIGTTQ-----FESLVELI 733
+++G+ +SLVE I
Sbjct: 67 TFSLGSRNKFVDRSQSLVEFI 87
Score = 35.8 bits (83), Expect = 0.012
Identities = 23/55 (41%), Positives = 31/55 (56%), Gaps = 5/55 (9%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRI 557
W+ G +S +AE +L DG+FLVR+S +SLSF QG V+H RI
Sbjct: 12 WYWGPMSW--EDAEKVLSNKP---DGSFLVRDSSDDRYIFSLSFRSQGSVHHTRI 61
Score = 28.5 bits (64), Expect = 4.6
Identities = 15/36 (41%), Positives = 20/36 (55%), Gaps = 1/36 (2%)
Query: 609 EDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSEND 644
+D WY + AE +L P DG+FLVR S +D
Sbjct: 8 KDCGWYWGPMSWEDAEKVLSNKP-DGSFLVRDSSDD 42
>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 = 44.2 bits (105), Expect = 4e-06
Identities = 20/56 (35%), Positives = 24/56 (42%), Gaps = 6/56 (10%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEG----GWWRGDYGGKRMHWFPSNYVA 838
V A+ Y R+ LSF K +I + EG GW G G R FP YV
Sbjct: 2 VVAVRAYITRDQTLLSFHKGDVIK-LLPKEGPLDPGWLFGTLDG-RSGAFPKEYVQ 55
>gnl|CDD|198269 cd10406, SH2_Vav2, Src homology 2 (SH2) domain found in the Vav2
proteins. Proto-oncogene vav is a member of the Dbl
family of guanine nucleotide exchange factors (GEF) for
the Rho family of GTP binding proteins. All vavs are
activated by tyrosine phosphorylation leading to their
activation. There are three Vav mammalian family
members: Vav1 which is expressed in the hematopoietic
system, and Vav2 and Vav3 are more ubiquitously
expressed. Vav2 is a GEF for RhoA, RhoB and RhoG and may
activate Rac1 and Cdc42. Vav2 has been shown to interact
with CD19 and Grb2. Alternatively spliced transcript
variants encoding different isoforms have been found for
Vav2. Vav proteins are involved in several processes
that require cytoskeletal reorganization, such as the
formation of the immunological synapse (IS),
phagocytosis, platelet aggregation, spreading, and
transformation. Vavs function as guanine nucleotide
exchange factors (GEFs) for the Rho/Rac family of
GTPases. Vav family members have several conserved
motifs/domains including: a leucine-rich region, a
leucine-zipper, a calponin homology (CH) domain, an
acidic domain, a Dbl-homology (DH) domain, a pleckstrin
homology (PH) domain, a cysteine-rich domain, 2 SH3
domains, a proline-rich region, and a SH2 domain. Vavs
are the only known Rho GEFs that have both the DH/PH
motifs and SH2/SH3 domains in the same protein. The
leucine-rich helix-loop-helix (HLH) domain is thought to
be involved in protein heterodimerization with other HLH
proteins and it may function as a negative regulator by
forming inactive heterodimers. The CH domain is usually
involved in the association with filamentous actin, but
in Vav it controls NFAT stimulation, Ca2+ mobilization,
and its transforming activity. Acidic domains are
involved in protein-protein interactions and contain
regulatory tyrosines. The DH domain is a GDP-GTP
exchange factor on Rho/Rac GTPases. The PH domain in
involved in interactions with GTP-binding proteins,
lipids and/or phosphorylated serine/threonine residues.
The SH3 domain is involved in localization of proteins
to specific sites within the cell interacting with
protein with proline-rich sequences. The SH2 domain
mediates a high affinity interaction with tyrosine
phosphorylated proteins. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 45.8 bits (108), Expect = 5e-06
Identities = 24/81 (29%), Positives = 44/81 (54%), Gaps = 2/81 (2%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCR-IRVEGRLYT 720
W+ R Q ++LL+ S G +L+R + + IS + D++KH + + + ++
Sbjct: 7 WFAGNMERQQTDNLLKSHAS-GTYLIRERPAEAERFAISIKFNDEVKHIKVVEKDNWIHI 65
Query: 721 IGTTQFESLVELISYYERHPL 741
+FESL+EL+ YY+ H L
Sbjct: 66 TEAKKFESLLELVEYYQCHSL 86
Score = 37.4 bits (86), Expect = 0.004
Identities = 22/88 (25%), Positives = 45/88 (51%), Gaps = 7/88 (7%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
WF G + R + ++LL+ ++ GT+L+RE +++S + V H ++ K
Sbjct: 7 WFAGNME--RQQTDNLLKSHA---SGTYLIRERPAEAERFAISIKFNDEVKHIKVVEK-- 59
Query: 563 SGQFYLVEKSYFDSLYSLISHYRTNHLR 590
++ E F+SL L+ +Y+ + L+
Sbjct: 60 DNWIHITEAKKFESLLELVEYYQCHSLK 87
Score = 28.5 bits (63), Expect = 4.4
Identities = 13/38 (34%), Positives = 24/38 (63%), Gaps = 1/38 (2%)
Query: 434 DKIKHCR-IRVEGRLYTIGTTQFESLVELISYYERHPL 470
D++KH + + + ++ +FESL+EL+ YY+ H L
Sbjct: 49 DEVKHIKVVEKDNWIHITEAKKFESLLELVEYYQCHSL 86
>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 = 44.2 bits (104), Expect = 6e-06
Identities = 20/52 (38%), Positives = 33/52 (63%), Gaps = 1/52 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVA 838
V+ALYD++A D+EL+F II + ++ WW+G+ + + FPSN+V
Sbjct: 4 VRALYDFEAVEDNELTFKHGEIIIVLDDSDANWWKGE-NHRGVGLFPSNFVT 54
>gnl|CDD|198227 cd10364, SH2_Src_Lyn, Src homology 2 (SH2) domain found in Lyn.
Lyn is a member of the Src non-receptor type tyrosine
kinase family of proteins and is expressed in the
hematopoietic cells, in neural tissues, liver, and
adipose tissue. There are two alternatively spliced
forms of Lyn. Lyn plays an inhibitory role in myeloid
lineage proliferation. Following engagement of the B
cell receptors, Lyn undergoes rapid phosphorylation and
activation, triggering a cascade of signaling events
mediated by Lyn phosphorylation of tyrosine residues
within the immunoreceptor tyrosine-based activation
motifs (ITAM) of the receptor proteins, and subsequent
recruitment and activation of other kinases including
Syk, phospholipase C2 (PLC2) and phosphatidyl inositol-3
kinase. These kinases play critical roles in
proliferation, Ca2+ mobilization and cell
differentiation. Lyn plays an essential role in the
transmission of inhibitory signals through
phosphorylation of tyrosine residues within the
immunoreceptor tyrosine-based inhibitory motifs (ITIM)
in regulatory proteins such as CD22, PIR-B and FC RIIb1.
Their ITIM phosphorylation subsequently leads to
recruitment and activation of phosphatases such as
SHIP-1 and SHP-1 which further down modulate signaling
pathways, attenuate cell activation and can mediate
tolerance. Lyn also plays a role in the insulin
signaling pathway. Activated Lyn phosphorylates insulin
receptor substrate 1 (IRS1) leading to an increase in
translocation of Glut-4 to the cell membrane and
increased glucose utilization. It is the primary Src
family member involved in signaling downstream of the B
cell receptor. Lyn plays an unusual, 2-fold role in B
cell receptor signaling; it is essential for initiation
of signaling but is also later involved in negative
regulation of the signal. Lyn has a unique N-terminal
domain, an SH3 domain, an SH2 domain, a kinase domain
and a regulatory tail, as do the other members of the
family. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 101
Score = 45.4 bits (107), Expect = 6e-06
Identities = 34/99 (34%), Positives = 48/99 (48%), Gaps = 10/99 (10%)
Query: 658 EDKEWYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNSSYVISFR-----AEDKIKHCR 711
E +EW+ TR AE LL S GAFL+R SE SY +S R D IKH +
Sbjct: 1 ETEEWFFKDITRKDAERQLLAPGNSAGAFLIRESETLKGSYSLSVRDYDPQHGDVIKHYK 60
Query: 712 IRV--EGRLYTIGTTQFESLVELISYYERHP--LYKKIE 746
IR G Y F + ++I +Y++ L +++E
Sbjct: 61 IRSLDNGGYYISPRITFPCISDMIKHYQKQSDGLCRRLE 99
Score = 43.8 bits (103), Expect = 2e-05
Identities = 30/90 (33%), Positives = 46/90 (51%), Gaps = 9/90 (10%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSF-----WWQGRVNHC 555
E+WF ++ R +AE L + G FL+RESET G YSLS + H
Sbjct: 3 EEWFFKDIT--RKDAERQLLAPGN-SAGAFLIRESETLKGSYSLSVRDYDPQHGDVIKHY 59
Query: 556 RIRSKPESGQFYLVEKSYFDSLYSLISHYR 585
+IRS ++G +Y+ + F + +I HY+
Sbjct: 60 KIRSL-DNGGYYISPRITFPCISDMIKHYQ 88
Score = 32.3 bits (73), Expect = 0.27
Identities = 19/41 (46%), Positives = 22/41 (53%), Gaps = 1/41 (2%)
Query: 609 EDKEWYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNSSY 648
E +EW+ TR AE LL S GAFL+R SE SY
Sbjct: 1 ETEEWFFKDITRKDAERQLLAPGNSAGAFLIRESETLKGSY 41
>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 = 43.9 bits (103), Expect = 6e-06
Identities = 24/52 (46%), Positives = 29/52 (55%), Gaps = 3/52 (5%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWW--RGDYGGKRMHWFPSNYVA 838
ALYDY+AR ++LSF K + EG WW R GK + PSNYVA
Sbjct: 5 ALYDYEARTTEDLSFKKGERFQIINNTEGDWWEARSIATGKN-GYIPSNYVA 55
>gnl|CDD|212999 cd12066, SH3_GRAF3, Src Homology 3 domain of GTPase Regulator
Associated with Focal adhesion kinase 3. GRAF3 is also
called Rho GTPase activating protein 42 (ARHGAP42) or
ARHGAP10-like. Though its function has not been
characterized, it may be a GAP with activity towards
RhoA and Cdc42, based on its similarity to GRAF and
GRAF2. It 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 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 = 55
Score = 43.5 bits (102), Expect = 8e-06
Identities = 24/51 (47%), Positives = 30/51 (58%), Gaps = 2/51 (3%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRA-EGGWWRGDYGGKRMHWFPSNYV 837
KA+Y +A + ELSFP+ AI SNV + E GW + Y GK P NYV
Sbjct: 3 KAMYSCKAEHSHELSFPQGAIFSNVYPSVEPGWLKATYEGK-TGLVPENYV 52
>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 = 24/54 (44%), Positives = 30/54 (55%), Gaps = 1/54 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAEI 840
V A+YDY DDELSF + AII + + + GW+ G G FP NYV I
Sbjct: 2 VVAIYDYSKDKDDELSFMEGAIIYVIKKNDDGWYEGVCNGV-TGLFPGNYVESI 54
>gnl|CDD|198259 cd10396, SH2_Tec_Itk, Src homology 2 (SH2) domain found in Tec
protein, IL2-inducible T-cell kinase (Itk). A member of
the Tec protein tyrosine kinase Itk is expressed thymus,
spleen, lymph node, T lymphocytes, NK and mast cells. It
plays a role in T-cell proliferation and
differentiation, analogous to Tec family kinases Txk.
Itk has been shown to interact with Fyn,
Wiskott-Aldrich syndrome protein, KHDRBS1, PLCG1,
Lymphocyte cytosolic protein 2, Linker of activated T
cells, Karyopherin alpha 2, Grb2, and Peptidylprolyl
isomerase A. Most of the Tec family members have a PH
domain (Txk and the short (type 1) splice variant of
Drosophila Btk29A are exceptions), a Tec homology (TH)
domain, a SH3 domain, a SH2 domain, and a protein kinase
catalytic domain. The TH domain consists of a
Zn2+-binding Btk motif and a proline-rich region. The
Btk motif is found in Tec kinases, Ras GAP, and IGBP. It
is crucial for the function of Tec PH domains and it's
lack of presence in Txk is not surprising since it lacks
a PH domain. The type 1 splice form of the Drosophila
homolog also lacks both the PH domain and the Btk motif.
The proline-rich regions are highly conserved for the
most part with the exception of Bmx whose residues
surrounding the PXXP motif are not conserved (TH-like)
and Btk29A which is entirely unique with large numbers
of glycine residues (TH-extended). Tec family members
all lack a C-terminal tyrosine having an autoinhibitory
function in its phosphorylated state. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 108
Score = 45.2 bits (107), Expect = 8e-06
Identities = 33/102 (32%), Positives = 45/102 (44%), Gaps = 11/102 (10%)
Query: 661 EWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVIS----FRAEDK--IKHCRIR- 713
EWY+ RS+AE LLR +G F+VR S Y +S E I+H I+
Sbjct: 7 EWYNKNINRSKAEKLLRDEGKEGGFMVRDSSQP-GLYTVSLYTKAGGEGNPCIRHYHIKE 65
Query: 714 ---VEGRLYTIGTTQFESLVELISYYERHPLYKKIELWYPVS 752
+ Y F S+ ELI Y++ + L YPVS
Sbjct: 66 TNDSPKKYYLAEKHVFNSIPELIEYHKHNAAGLVTRLRYPVS 107
Score = 37.8 bits (88), Expect = 0.003
Identities = 31/100 (31%), Positives = 54/100 (54%), Gaps = 13/100 (13%)
Query: 495 DELHFGEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQ--GRV 552
+ L E W++ ++ R++AE LLR +G F+VR+S G Y++S + + G
Sbjct: 1 NNLDQYE-WYNKNIN--RSKAEKLLRDEGK--EGGFMVRDSSQ-PGLYTVSLYTKAGGEG 54
Query: 553 NHC----RIRSKPES-GQFYLVEKSYFDSLYSLISHYRTN 587
N C I+ +S ++YL EK F+S+ LI +++ N
Sbjct: 55 NPCIRHYHIKETNDSPKKYYLAEKHVFNSIPELIEYHKHN 94
Score = 37.5 bits (87), Expect = 0.005
Identities = 15/32 (46%), Positives = 19/32 (59%)
Query: 612 EWYHPTATRSQAEDLLRRVPSDGAFLVRPSEN 643
EWY+ RS+AE LLR +G F+VR S
Sbjct: 7 EWYNKNINRSKAEKLLRDEGKEGGFMVRDSSQ 38
>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 = 43.5 bits (102), Expect = 1e-05
Identities = 23/54 (42%), Positives = 30/54 (55%), Gaps = 1/54 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAEI 840
V A+YDY +DELSF + AII + + + GW+ G G FP NYV I
Sbjct: 5 VVAIYDYTKDKEDELSFQEGAIIYVIKKNDDGWYEGVMNGV-TGLFPGNYVESI 57
>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 = 43.1 bits (101), Expect = 1e-05
Identities = 21/56 (37%), Positives = 30/56 (53%), Gaps = 1/56 (1%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGK-RMHWFPSNYVAEI 840
+ +A+YDY+A +DDE+SF I NV + GW G + P+NYV I
Sbjct: 3 SFRAMYDYRAADDDEVSFKDGDTIVNVQTIDEGWMYGTVQRTGKTGMLPANYVEAI 58
>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 = 21/51 (41%), Positives = 30/51 (58%), Gaps = 1/51 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
V+A YD+ A + +LSF + II + + WWRG G R+ +FP NYV
Sbjct: 2 VQAQYDFSAEDPSQLSFRRGDIIEVLDCPDPNWWRGRISG-RVGFFPRNYV 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 = 43.0 bits (101), Expect = 1e-05
Identities = 20/55 (36%), Positives = 31/55 (56%), Gaps = 6/55 (10%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTR-----AEGGWWRGDYGGKRMHWFPSNYVA 838
ALYDY+A +DELS + ++ +++ + GWW G R+ FP+NYV
Sbjct: 4 ALYDYEASGEDELSLRRGDVVEVLSQDAAVSGDDGWWAGKI-RHRLGIFPANYVT 57
>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 = 42.6 bits (101), Expect = 2e-05
Identities = 16/36 (44%), Positives = 22/36 (61%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWR 821
ALYDY+AR DD+LSF K + + ++G WW
Sbjct: 1 IYVALYDYEARTDDDLSFKKGDRLQILDDSDGDWWL 36
>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 = 42.3 bits (100), Expect = 2e-05
Identities = 20/50 (40%), Positives = 30/50 (60%), Gaps = 1/50 (2%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
KALY+Y+ + +LSF K II R + W+ G+ GK +FP++YV
Sbjct: 3 KALYNYEGKEPGDLSFKKGDIILLRKRIDENWYHGECNGK-QGFFPASYV 51
>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 = 42.4 bits (100), Expect = 2e-05
Identities = 21/49 (42%), Positives = 28/49 (57%), Gaps = 2/49 (4%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
ALY Y++ +L+F +I VT+ +G WW G G R FPSNYV
Sbjct: 4 ALYPYESNEPGDLTFNAGDVIL-VTKKDGEWWTGTIGD-RTGIFPSNYV 50
>gnl|CDD|212939 cd12006, SH3_Fyn_Yrk, Src homology 3 domain of Fyn and Yrk Protein
Tyrosine Kinases. Fyn and Yrk (Yes-related kinase) are
members of the Src subfamily of proteins, which are
cytoplasmic (or non-receptor) PTKs. Fyn, together with
Lck, plays a critical role in T-cell signal transduction
by phosphorylating ITAM (immunoreceptor tyr activation
motif) sequences on T-cell receptors, ultimately leading
to the proliferation and differentiation of T-cells. In
addition, Fyn is involved in the myelination of neurons,
and is implicated in Alzheimer's and Parkinson's
diseases. Yrk has been detected only in chickens. It is
primarily found in neuronal and epithelial cells and in
macrophages. It may play a role in inflammation and in
response to injury. Src kinases contain an N-terminal
SH4 domain with a myristoylation site, followed by SH3
and SH2 domains, a tyr kinase domain, and a regulatory
C-terminal region containing a conserved tyr. They are
activated by autophosphorylation at the tyr kinase
domain, but are negatively regulated by phosphorylation
at the C-terminal tyr by Csk (C-terminal Src Kinase).
The SH3 domain of Src kinases contributes to substrate
recruitment by binding adaptor proteins/substrates, and
regulation of kinase activity through an intramolecular
interaction. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 56
Score = 42.3 bits (99), Expect = 2e-05
Identities = 23/53 (43%), Positives = 29/53 (54%), Gaps = 5/53 (9%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRG---DYGGKRMHWFPSNYVA 838
ALYDY+AR +D+LSF K + +EG WW G + PSNYVA
Sbjct: 5 ALYDYEARTEDDLSFHKGEKFQILNSSEGDWWEARSLTTGET--GYIPSNYVA 55
>gnl|CDD|198266 cd10403, SH2_STAP1, Src homology 2 domain found in
Signal-transducing adaptor protein 1 (STAP1). STAP1 is
a signal-transducing adaptor protein. It is composed of
a Pleckstrin homology (PH) and SH2 domains along with
several tyrosine phosphorylation sites. STAP-1 is an
ortholog of BRDG1 (BCR downstream signaling 1). STAP1
protein functions as a docking protein acting downstream
of Tec tyrosine kinase in B cell antigen receptor
signaling. The protein is phosphorylated by Tec and
participates in a positive feedback loop, increasing Tec
activity. STAP1 has been shown to interact with C19orf2,
an unconventional prefoldin RPB5 interactor. In general
SH2 domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 94
Score = 43.6 bits (103), Expect = 2e-05
Identities = 26/59 (44%), Positives = 37/59 (62%), Gaps = 4/59 (6%)
Query: 666 TATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAE---DKIKHCRIRVEGRLYTI 721
+R +AE+LL R PS G L+RP +D+S+Y I+ R E +IKH R+ G+ YTI
Sbjct: 6 KVSRKEAEELLERNPSCGNMLLRPG-SDSSNYSITTRQEINKPRIKHYRVMSRGQGYTI 63
Score = 28.5 bits (64), Expect = 3.6
Identities = 15/32 (46%), Positives = 22/32 (68%), Gaps = 1/32 (3%)
Query: 617 TATRSQAEDLLRRVPSDGAFLVRPSENDNSSY 648
+R +AE+LL R PS G L+RP +D+S+Y
Sbjct: 6 KVSRKEAEELLERNPSCGNMLLRPG-SDSSNY 36
>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 = 42.2 bits (100), Expect = 2e-05
Identities = 16/48 (33%), Positives = 28/48 (58%), Gaps = 1/48 (2%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNY 836
A+ DY+A+ DDE+S + ++ + + + GWW G K W P++Y
Sbjct: 4 AIADYEAQGDDEISLQEGEVVEVLEKNDSGWWYVRKGDKE-GWVPASY 50
>gnl|CDD|198213 cd10350, SH2_SH2D4A, Src homology 2 domain found in the SH2 domain
containing protein 4A (SH2D4A). SH2D4A contains a
single SH2 domain. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 43.4 bits (102), Expect = 3e-05
Identities = 25/83 (30%), Positives = 43/83 (51%), Gaps = 5/83 (6%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLYT- 720
W+H T +A +LL G+FL+R SE Y +S+ +E+ KH I Y+
Sbjct: 9 WFHGILTLKKANELLLST-MPGSFLIRVSEKIK-GYALSYLSEEGCKHFLIDASADSYSF 66
Query: 721 IGTTQFE--SLVELISYYERHPL 741
+G Q + +L +L+ Y++ P+
Sbjct: 67 LGVDQLQHATLADLVEYHKEEPI 89
Score = 39.9 bits (93), Expect = 5e-04
Identities = 26/91 (28%), Positives = 44/91 (48%), Gaps = 6/91 (6%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSK 560
WFHG L+ +A +LL G+FL+R SE G Y+LS+ + H I +
Sbjct: 7 APWFHGILT--LKKANELL---LSTMPGSFLIRVSEKIKG-YALSYLSEEGCKHFLIDAS 60
Query: 561 PESGQFYLVEKSYFDSLYSLISHYRTNHLRS 591
+S F V++ +L L+ +++ + S
Sbjct: 61 ADSYSFLGVDQLQHATLADLVEYHKEEPITS 91
>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 = 41.9 bits (99), Expect = 3e-05
Identities = 22/52 (42%), Positives = 28/52 (53%), Gaps = 2/52 (3%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGK--RMHWFPSNY 836
V+ALYD QA NDDEL+F + II + WW G G R FP ++
Sbjct: 2 VRALYDCQADNDDELTFSEGEIIVVTGEEDDEWWEGHIEGDPSRRGVFPVSF 53
>gnl|CDD|198278 cd10415, SH2_Grb10, Src homology 2 (SH2) domain found in the growth
factor receptor bound, subclass 10 (Grb10) proteins.
The Grb family binds to the epidermal growth factor
receptor (EGFR, erbB1) via their SH2 domains. Grb10 is
part of the Grb7 family of proteins which also includes
Grb7, and Grb14. They are composed of an N-terminal
Proline-rich domain, a Ras Associating-like (RA) domain,
a Pleckstrin Homology (PH) domain, a phosphotyrosine
interaction region (PIR, BPS) and a C-terminal SH2
domain. The SH2 domains of Grb7, Grb10 and Grb14
preferentially bind to a different RTK. Grb10 has been
shown to interact with many different proteins,
including the insulin and IGF1 receptors,
platelet-derived growth factor (PDGF) receptor-beta,
Ret, Kit, Raf1 and MEK1, and Nedd4. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 108
Score = 43.5 bits (102), Expect = 3e-05
Identities = 22/88 (25%), Positives = 50/88 (56%), Gaps = 7/88 (7%)
Query: 657 HEDKEWYHPTATRSQAEDLLRRVPS-DGAFLVRPSENDNSSYVISFRAEDKIKHCRI--- 712
H + W+H +R ++ ++++ DG FL+R S+++ ++V++ KIK+ +I
Sbjct: 2 HRTQHWFHGRISREESHRIIKQQGLVDGLFLLRDSQSNPKAFVLTLCHHQKIKNFQILPC 61
Query: 713 RVEGRLY---TIGTTQFESLVELISYYE 737
+G+ + G T+F L++L+ +Y+
Sbjct: 62 EDDGQTFFSLDDGNTKFSDLIQLVDFYQ 89
Score = 40.4 bits (94), Expect = 4e-04
Identities = 24/94 (25%), Positives = 48/94 (51%), Gaps = 6/94 (6%)
Query: 497 LHFGEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCR 556
+H + WFHGR+S R E+ ++++ + DG FL+R+S++ + L+ ++ + +
Sbjct: 1 IHRTQHWFHGRIS--REESHRIIKQQGLV-DGLFLLRDSQSNPKAFVLTLCHHQKIKNFQ 57
Query: 557 IRSKPESGQFYLV---EKSYFDSLYSLISHYRTN 587
I + GQ + + F L L+ Y+ N
Sbjct: 58 ILPCEDDGQTFFSLDDGNTKFSDLIQLVDFYQLN 91
>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 = 41.5 bits (98), Expect = 4e-05
Identities = 20/58 (34%), Positives = 30/58 (51%), Gaps = 13/58 (22%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTR--AEGGWW-----RGDYGGKRMHWFPSNYV 837
V+ALYD+ ++ ELS +++ +TR GW RG+ G FPS+YV
Sbjct: 2 VRALYDFDSQPSGELSLRAGEVLT-ITRQDVGDGWLEGRNSRGEVG-----LFPSSYV 53
>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 = 41.6 bits (97), Expect = 4e-05
Identities = 21/51 (41%), Positives = 28/51 (54%), Gaps = 1/51 (1%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGD-YGGKRMHWFPSNYVA 838
ALYDY++R + +LSF K + V EG WW + + PSNYVA
Sbjct: 4 ALYDYESRTETDLSFKKGERLQIVNNTEGDWWLAHSLTTGQTGYIPSNYVA 54
>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 = 41.4 bits (97), Expect = 4e-05
Identities = 15/40 (37%), Positives = 23/40 (57%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKR 828
A +DY R ELSF + ++ ++A WWRG++ G R
Sbjct: 6 ACFDYTGRTAQELSFKRGDVLLLHSKASSDWWRGEHNGMR 45
>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 = 41.6 bits (98), Expect = 4e-05
Identities = 19/55 (34%), Positives = 27/55 (49%), Gaps = 1/55 (1%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRG-DYGGKRMHWFPSNYVAE 839
T KALYD+ +ELS K I+ V + + GWW + W P+ Y+ E
Sbjct: 1 TYKALYDFAGSVANELSLKKDDIVYIVQKEDNGWWLAKKLDESKEGWVPAAYLEE 55
>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 = 41.5 bits (97), Expect = 4e-05
Identities = 20/49 (40%), Positives = 29/49 (59%), Gaps = 2/49 (4%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
A+Y Y++ +L+F + +I VT+ +G WW G G K FPSNYV
Sbjct: 4 AMYTYESNEQGDLTFQQGDVIL-VTKKDGDWWTGTVGDK-TGVFPSNYV 50
>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 = 41.5 bits (98), Expect = 5e-05
Identities = 18/50 (36%), Positives = 29/50 (58%), Gaps = 1/50 (2%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ALYD++ N+ EL F + II+ + + W+ G G + +FP NYV
Sbjct: 4 RALYDFEPENEGELGFKEGDIITLTNQIDENWYEGMVNG-QSGFFPVNYV 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 = 41.2 bits (96), Expect = 6e-05
Identities = 19/50 (38%), Positives = 33/50 (66%), Gaps = 2/50 (4%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ALY ++A+ D+ L+F K+ +I+ V + WW G+ G++ WFP +YV
Sbjct: 3 QALYPWRAKKDNHLNFNKNDVIT-VLEQQDMWWFGEVQGQK-GWFPKSYV 50
>gnl|CDD|212988 cd12055, SH3_CIN85_2, Second Src Homology 3 domain (SH3B) of
Cbl-interacting protein of 85 kDa. CIN85, also called
SH3 domain-containing kinase-binding protein 1 (SH3KBP1)
or CD2-binding protein 3 (CD2BP3) or Ruk, is an adaptor
protein that is involved in the downregulation of
receptor tyrosine kinases by facilitating endocytosis
through interaction with endophilin-associated ubiquitin
ligase Cbl proteins. It is also important in many other
cellular processes including vesicle-mediated transport,
cytoskeletal remodelling, apoptosis, cell adhesion and
migration, and viral infection, among others. CIN85
exists as multiple variants from alternative splicing;
the main variant contains three SH3 domains, a
proline-rich region, and a C-terminal coiled-coil
domain. All of these domains enable CIN85 to bind
various protein partners and assemble complexes that
have been implicated in many different functions. This
alignment model represents the second SH3 domain (SH3B)
of CIN85. SH3B has been shown to bind Cbl proline-rich
peptides and ubiquitin. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 41.1 bits (96), Expect = 6e-05
Identities = 20/52 (38%), Positives = 26/52 (50%), Gaps = 1/52 (1%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
+ + Y +N+DEL II V E GWW G GK FPSN++ E
Sbjct: 3 QVAFSYLPQNEDELELKVGDIIEVVGEVEEGWWEGVLNGK-TGMFPSNFIKE 53
>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 = 41.2 bits (97), Expect = 6e-05
Identities = 21/59 (35%), Positives = 32/59 (54%), Gaps = 6/59 (10%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGG-WWRGDY----GGKRMHWFPSNYVAE 839
VKALY Y++ ++D+L+F +I VT E W+ G+Y G + FP N+V
Sbjct: 3 KVKALYPYESDHEDDLNFDVGQLI-TVTEEEDADWYFGEYVDSNGNTKEGIFPKNFVEV 60
>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 = 40.8 bits (96), Expect = 6e-05
Identities = 20/55 (36%), Positives = 31/55 (56%), Gaps = 3/55 (5%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTR--AEGGWWRGDYGGKRMHWFPSNYVA 838
V ALY ++ + +LSF I+ +TR ++ WW G G R+ FP+NYV+
Sbjct: 1 EVTALYSFEGQQPCDLSFQAGDRITVLTRTDSQFDWWEGRLRG-RVGIFPANYVS 54
>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 = 40.8 bits (96), Expect = 7e-05
Identities = 20/59 (33%), Positives = 31/59 (52%), Gaps = 11/59 (18%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEG-GWWRGDYGGKRMH-----WFPSNYVAE 839
V+ ++ Y A+ DEL+ + ++ NV R GW Y G+R+ WFPS+Y E
Sbjct: 2 VQCVHAYTAQQPDELTLEEGDVV-NVLRKMPDGW----YEGERLRDGERGWFPSSYTEE 55
>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 = 40.7 bits (95), Expect = 7e-05
Identities = 20/54 (37%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 785 ITVKALYDYQARNDDELSFPK-HAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ V+ALYDY + DELSF ++ E GW +G R+ +P+NYV
Sbjct: 2 VRVRALYDYTGQEADELSFKAGEELLKIGEEDEQGWCKGRLLSGRIGLYPANYV 55
>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 = 40.8 bits (96), Expect = 8e-05
Identities = 18/52 (34%), Positives = 31/52 (59%), Gaps = 1/52 (1%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ALY ++A++ ELS K II + + W+ G++ G R+ FP++YV
Sbjct: 1 KARALYPFKAQSAKELSLKKGDIIYIRRQIDKNWYEGEHNG-RVGIFPASYV 51
>gnl|CDD|198220 cd10357, SH2_ShkD_ShkE, Src homology 2 (SH2) domain found in SH2
domain-bearing protein kinases D and E (ShkD and ShkE).
SH2-bearing genes cloned from Dictyostelium include two
transcription factors, STATa and STATc, and a signaling
factor, SHK1 (shkA). A database search of the
Dictyostelium discoideum genome revealed two additional
putative STAT sequences, dd-STATb and dd-STATd, and four
additional putative SHK genes, dd-SHK2 (shkB), dd-SHK3
(shkC), dd-SHK4 (shkD), and dd-SHK5 (shkE). This model
contains members of shkD and shkE. All of the SHK
members are most closely related to the protein kinases
found in plants. However these kinases in plants are
not conjugated to any SH2 or SH2-like sequences.
Alignment data indicates that the SHK SH2 domains carry
some features of the STAT SH2 domains in Dictyostelium.
When STATc's linker domain was used for a BLAST search,
the sequence between the protein kinase domain and the
SH2 domain (the linker) of SHK was recovered, suggesting
a close relationship among these molecules within this
region. SHK's linker domain is predicted to contain an
alpha-helix which is indeed homologous to that of STAT.
Based on the phylogenetic alignment, SH2 domains can be
grouped into two categories, STAT-type and Src-type. SHK
family members are in between, but are closer to the
STAT-type which indicates a close relationship between
SHK and STAT families in their SH2 domains and further
supports the notion that SHKs linker-SH2 domain evolved
from STAT or STATL (STAT-like Linker-SH2) domain found
in plants. In SHK, STAT, and SPT6, the linker-SH2
domains all reside exclusively in the C-terminal
regions. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 87
Score = 41.7 bits (98), Expect = 8e-05
Identities = 21/58 (36%), Positives = 30/58 (51%), Gaps = 3/58 (5%)
Query: 660 KEWYHPTATRSQAEDLLRRVPSDGAFLVRPSEND--NSSYVISFRAEDKIKHCRIRVE 715
K W+H +R +AE LR P +G FL+R S D + + IS + + K H RI
Sbjct: 10 KSWFHGDISRDEAEKRLRGRP-EGTFLIRLSSTDPKKTPFTISKKKKSKPVHKRISRI 66
Score = 37.1 bits (86), Expect = 0.003
Identities = 21/64 (32%), Positives = 27/64 (42%), Gaps = 6/64 (9%)
Query: 611 KEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYEPVPQPNQHEDKEWYHPTATRS 670
K W+H +R +AE LR P +G FL+R S D P P K+ P R
Sbjct: 10 KSWFHGDISRDEAEKRLRGRP-EGTFLIRLSSTD-----PKKTPFTISKKKKSKPVHKRI 63
Query: 671 QAED 674
D
Sbjct: 64 SRID 67
Score = 32.1 bits (73), Expect = 0.18
Identities = 19/44 (43%), Positives = 24/44 (54%), Gaps = 5/44 (11%)
Query: 494 NDELHFGEKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESET 537
N + + WFHG +S R EAE LR +GTFL+R S T
Sbjct: 3 NINILLAKSWFHGDIS--RDEAEKRLRGRP---EGTFLIRLSST 41
>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 = 40.5 bits (95), Expect = 8e-05
Identities = 14/40 (35%), Positives = 21/40 (52%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKR 828
A +DY R++ ELSF K ++ + WWRG G+
Sbjct: 4 AQFDYTGRSERELSFKKGDSLTLYRQVSDDWWRGQLNGQD 43
>gnl|CDD|198219 cd10356, SH2_ShkA_ShkC, Src homology 2 (SH2) domain found in SH2
domain-bearing protein kinases A and C (ShkA and ShkC).
SH2-bearing genes cloned from Dictyostelium include two
transcription factors, STATa and STATc, and a signaling
factor, SHK1 (shkA). A database search of the
Dictyostelium discoideum genome revealed two additional
putative STAT sequences, dd-STATb and dd-STATd, and four
additional putative SHK genes, dd-SHK2 (shkB), dd-SHK3
(shkC), dd-SHK4 (shkD), and dd-SHK5 (shkE). This model
contains members of shkA and shkC. All of the SHK
members are most closely related to the protein kinases
found in plants. However these kinases in plants are
not conjugated to any SH2 or SH2-like sequences.
Alignment data indicates that the SHK SH2 domains carry
some features of the STAT SH2 domains in Dictyostelium.
When STATc's linker domain was used for a BLAST search,
the sequence between the protein kinase domain and the
SH2 domain (the linker) of SHK was recovered, suggesting
a close relationship among these molecules within this
region. SHK's linker domain is predicted to contain an
alpha-helix which is indeed homologous to that of STAT.
Based on the phylogenetic alignment, SH2 domains can be
grouped into two categories, STAT-type and Src-type. SHK
family members are in between, but are closer to the
STAT-type which indicates a close relationship between
SHK and STAT families in their SH2 domains and further
supports the notion that SHKs linker-SH2 domain evolved
from STAT or STATL (STAT-like Linker-SH2) domain found
in plants. In SHK, STAT, and SPT6, the linker-SH2
domains all reside exclusively in the C-terminal
regions. In general SH2 domains are involved in signal
transduction. They typically bind pTyr-containing
ligands via two surface pockets, a pTyr and hydrophobic
binding pocket, allowing proteins with SH2 domains to
localize to tyrosine phosphorylated sites.
Length = 113
Score = 42.2 bits (99), Expect = 9e-05
Identities = 24/74 (32%), Positives = 40/74 (54%), Gaps = 2/74 (2%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVIS-FRAEDKIKHCRIRVEGRLYT 720
W+H + S++E+ L P +G FLVR S ++ +Y IS I H RI G +
Sbjct: 12 WFHGDISTSESENRLNGKP-EGTFLVRFSTSEPGAYTISKVSKNGGISHQRIHRPGGKFQ 70
Query: 721 IGTTQFESLVELIS 734
+ +++ S+ ELI+
Sbjct: 71 VNNSKYLSVKELIA 84
Score = 39.9 bits (93), Expect = 6e-04
Identities = 30/82 (36%), Positives = 45/82 (54%), Gaps = 9/82 (10%)
Query: 502 KWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLS-FWWQGRVNHCRIRSK 560
WFHG +S +E+E+ L +GTFLVR S + G Y++S G ++H RI +
Sbjct: 11 AWFHGDIS--TSESENRLNGKP---EGTFLVRFSTSEPGAYTISKVSKNGGISHQRI-HR 64
Query: 561 PESGQFYLVEKSYFDSLYSLIS 582
P G+F V S + S+ LI+
Sbjct: 65 P-GGKF-QVNNSKYLSVKELIA 84
>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 = 40.4 bits (94), Expect = 1e-04
Identities = 20/50 (40%), Positives = 31/50 (62%), Gaps = 2/50 (4%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+AL + A+ D+ L+F K+ II+ + + E WW G+ G R WFP +YV
Sbjct: 3 QALCSWTAKKDNHLNFSKNDIITVLEQQE-NWWFGEVHGGR-GWFPKSYV 50
>gnl|CDD|198263 cd10400, SH2_SAP1a, Src homology 2 (SH2) domain found in
SLAM-associated protein (SAP) 1a. The X-linked
lymphoproliferative syndrome (XLP) gene encodes SAP
(also called SH2D1A/DSHP) a protein that consists of a 5
residue N-terminus, a single SH2 domain, and a short 25
residue C-terminal tail. XLP is characterized by an
extreme sensitivity to Epstein-Barr virus. Both T and
natural killer (NK) cell dysfunctions have been seen in
XLP patients. SAP binds the cytoplasmic tail of
Signaling lymphocytic activation molecule (SLAM), 2B4,
Ly-9, and CD84. SAP is believed to function as a
signaling inhibitor, by blocking or regulating binding
of other signaling proteins. SAP and the SAP-like
protein EAT-2 recognize the sequence motif TIpYXX[VI],
which is found in the cytoplasmic domains of a
restricted number of T, B, and NK cell surface receptors
and are proposed to be natural inhibitors or regulators
of the physiological role of a small family of receptors
on the surface of these cells. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 41.8 bits (98), Expect = 1e-04
Identities = 33/104 (31%), Positives = 52/104 (50%), Gaps = 13/104 (12%)
Query: 504 FHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPES 563
+HG++S R E LL DG++L+R+SE+ G Y L ++G V R+ S+ E+
Sbjct: 6 YHGKIS--RETGEKLLLAAGL--DGSYLLRDSESVPGVYCLCVLYKGYVYTYRV-SQTET 60
Query: 564 GQFYL-----VEKSYFDSLYSLISHYRTNHLRSQEFLITLQEPV 602
G + V K F + +LIS ++ Q + LQ PV
Sbjct: 61 GSWSAETAPGVHKRLFRKVKNLISAFQKP---DQGIVTPLQYPV 101
Score = 28.7 bits (64), Expect = 4.3
Identities = 24/96 (25%), Positives = 40/96 (41%), Gaps = 7/96 (7%)
Query: 663 YHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI-RVEGRLYTI 721
YH +R E LL DG++L+R SE+ Y + + + R+ + E ++
Sbjct: 6 YHGKISRETGEKLLLAAGLDGSYLLRDSESVPGVYCLCVLYKGYVYTYRVSQTETGSWSA 65
Query: 722 GTTQ------FESLVELISYYERHPLYKKIELWYPV 751
T F + LIS +++ L YPV
Sbjct: 66 ETAPGVHKRLFRKVKNLISAFQKPDQGIVTPLQYPV 101
>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 = 40.4 bits (94), Expect = 1e-04
Identities = 20/52 (38%), Positives = 30/52 (57%), Gaps = 1/52 (1%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
T A+ YQ++ + E+S K I ++ EGG+W G G R+ WFPS+ V
Sbjct: 2 TFMAVKPYQSQAEGEISLSKGEKIKVLSVGEGGFWEGQVKG-RVGWFPSDCV 52
>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 = 18/51 (35%), Positives = 28/51 (54%), Gaps = 2/51 (3%)
Query: 788 KALYDYQA-RNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ LY + ++ LSF +I + +GGWW G+ G R WFP++YV
Sbjct: 3 RTLYAFTGEQHQQGLSFEAGELIRVLQAPDGGWWEGEKDGLR-GWFPASYV 52
>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 = 40.4 bits (95), Expect = 1e-04
Identities = 16/54 (29%), Positives = 29/54 (53%), Gaps = 4/54 (7%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDY---GGKR-MHWFPSNYV 837
+ + + A +++LS ++ ++ GWW G+ G KR + WFP+NYV
Sbjct: 3 QVIAPFTATAENQLSLAVGQLVLVRKKSPSGWWEGELQARGKKRQIGWFPANYV 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 = 40.2 bits (94), Expect = 1e-04
Identities = 21/57 (36%), Positives = 29/57 (50%), Gaps = 6/57 (10%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWW----RGDYGGKRMHWF-PSNYVAE 839
KAL+D++AR D+ELSF + + G WW GG F P+NY+A
Sbjct: 3 KALWDFKARGDEELSF-QAGDQFRIAERSGDWWTALKLDRAGGVVAQGFVPNNYLAR 58
>gnl|CDD|198253 cd10390, SH2_SHD, Src homology 2 domain found in SH2
domain-containing adapter proteins D (SHD). The
expression of SHD is restricted to the brain. SHD may be
a physiological substrate of c-Abl and may function as
an adapter protein in the central nervous system. It is
also thought to be involved in apoptotic regulation. SHD
contains five YXXP motifs, a substrate sequence
preferred by Abl tyrosine kinases, in addition to a
poly-proline rich region and a C-terminal SH2 domain. In
general SH2 domains are involved in signal transduction.
They typically bind pTyr-containing ligands via two
surface pockets, a pTyr and hydrophobic binding pocket,
allowing proteins with SH2 domains to localize to
tyrosine phosphorylated sites.
Length = 98
Score = 41.6 bits (97), Expect = 1e-04
Identities = 35/93 (37%), Positives = 48/93 (51%), Gaps = 7/93 (7%)
Query: 501 EKWFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSK 560
+ WFHG LS RA+AE+LL S +G++LVR SET D SLS H + ++
Sbjct: 1 QPWFHGPLS--RADAENLL---SLCKEGSYLVRLSETRPQDCSLSLRSSQGFLHLKF-AR 54
Query: 561 PESGQFYLVEKS-YFDSLYSLISHYRTNHLRSQ 592
Q L + S F S+ L+ HY + L Q
Sbjct: 55 TRENQVVLGQHSGPFPSVPELVLHYSSRPLPVQ 87
Score = 40.8 bits (95), Expect = 2e-04
Identities = 29/97 (29%), Positives = 47/97 (48%), Gaps = 8/97 (8%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI-RVEGRLYT 720
W+H +R+ AE+LL + +G++LVR SE +S R+ H + R
Sbjct: 3 WFHGPLSRADAENLL-SLCKEGSYLVRLSETRPQDCSLSLRSSQGFLHLKFARTRENQVV 61
Query: 721 IG--TTQFESLVELISYYERHPL----YKKIELWYPV 751
+G + F S+ EL+ +Y PL + + L YPV
Sbjct: 62 LGQHSGPFPSVPELVLHYSSRPLPVQGAEHLALLYPV 98
>gnl|CDD|198192 cd09939, SH2_STAP_family, Src homology 2 domain found in
Signal-transducing adaptor protein (STAP) family. STAP1
and STAP2 are signal-transducing adaptor proteins. They
are composed of a Pleckstrin homology (PH) and SH2
domains along with several tyrosine phosphorylation
sites. STAP-1 is an ortholog of BRDG1 (BCR downstream
signaling 1). STAP1 protein functions as a docking
protein acting downstream of Tec tyrosine kinase in B
cell antigen receptor signaling. The protein is
phosphorylated by Tec and participates in a positive
feedback loop, increasing Tec activity. STAP1 has been
shown to interact with C19orf2, an unconventional
prefoldin RPB5 interactor. The STAP2 protein is the
substrate of breast tumor kinase, an Src-type
non-receptor tyrosine kinase that mediates the
interactions linking proteins involved in signal
transduction pathways. STAP2 has alternative splicing
variants. STAP2 has been shown to interact with
tyrosine-protein kinase 6 (PTK6). In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 94
Score = 41.0 bits (96), Expect = 1e-04
Identities = 25/80 (31%), Positives = 44/80 (55%), Gaps = 7/80 (8%)
Query: 666 TATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAE---DKIKHCRIRVEGRLYTIG 722
T +R +A +LL R PS G L+RP +D+ +Y ++ R E I+H ++ G+ YTI
Sbjct: 6 TVSRKEATELLERNPSCGNMLLRPG-SDSRNYSVTTRQEINIPVIRHYKVMSVGQNYTIE 64
Query: 723 TTQ---FESLVELISYYERH 739
+ +L +I+Y+ +
Sbjct: 65 LEKPVTCPNLFSVINYFVKE 84
Score = 28.3 bits (63), Expect = 4.5
Identities = 14/32 (43%), Positives = 21/32 (65%), Gaps = 1/32 (3%)
Query: 617 TATRSQAEDLLRRVPSDGAFLVRPSENDNSSY 648
T +R +A +LL R PS G L+RP +D+ +Y
Sbjct: 6 TVSRKEATELLERNPSCGNMLLRPG-SDSRNY 36
>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 = 39.8 bits (93), Expect = 2e-04
Identities = 17/48 (35%), Positives = 25/48 (52%)
Query: 790 LYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
LYDY+ D+E+ + I++N+ + WW G FPSNYV
Sbjct: 5 LYDYEKDEDNEIELVEGEIVTNIEMVDEDWWMGTNSKGESGLFPSNYV 52
>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 = 39.8 bits (93), Expect = 2e-04
Identities = 20/50 (40%), Positives = 32/50 (64%), Gaps = 1/50 (2%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
KAL D++ +DDEL F K+ II+ +++ + W G+ G R WFP+ +V
Sbjct: 3 KALLDFERHDDDELGFRKNDIITIISQKDEHCWVGELNGLR-GWFPAKFV 51
>gnl|CDD|198214 cd10351, SH2_SH2D4B, Src homology 2 domain found in the SH2 domain
containing protein 4B (SH2D4B). SH2D4B contains a
single SH2 domain. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 41.0 bits (96), Expect = 2e-04
Identities = 24/79 (30%), Positives = 41/79 (51%), Gaps = 5/79 (6%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLYT- 720
W+H +R +AE LL +G+FLVR SE Y +S+R + KH + G Y+
Sbjct: 9 WFHGIISREEAEALLMNAT-EGSFLVRVSEKI-WGYTLSYRLQSGFKHFLVDASGDFYSF 66
Query: 721 --IGTTQFESLVELISYYE 737
+ + +L +LI +++
Sbjct: 67 LGVDPNRHATLTDLIDFHK 85
Score = 39.5 bits (92), Expect = 6e-04
Identities = 28/65 (43%), Positives = 36/65 (55%), Gaps = 9/65 (13%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
WFHG +S R EAE LL + +G+FLVR SE G Y+LS+ Q H + +
Sbjct: 9 WFHGIIS--REEAEALLMNAT---EGSFLVRVSEKIWG-YTLSYRLQSGFKHFLVDA--- 59
Query: 563 SGQFY 567
SG FY
Sbjct: 60 SGDFY 64
Score = 31.8 bits (72), Expect = 0.30
Identities = 14/30 (46%), Positives = 19/30 (63%), Gaps = 1/30 (3%)
Query: 613 WYHPTATRSQAEDLLRRVPSDGAFLVRPSE 642
W+H +R +AE LL +G+FLVR SE
Sbjct: 9 WFHGIISREEAEALLMNAT-EGSFLVRVSE 37
>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 = 39.5 bits (92), Expect = 2e-04
Identities = 19/54 (35%), Positives = 30/54 (55%), Gaps = 1/54 (1%)
Query: 785 ITVKALYDYQARNDDELSFPKHAIISNV-TRAEGGWWRGDYGGKRMHWFPSNYV 837
+ V+ALYDY + DELSF ++ + E GW +G ++ +P+NYV
Sbjct: 1 VRVRALYDYDGQEQDELSFKAGDELTKLEDEDEQGWCKGRLDSGQVGLYPANYV 54
>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 = 39.4 bits (92), Expect = 2e-04
Identities = 15/47 (31%), Positives = 25/47 (53%), Gaps = 1/47 (2%)
Query: 791 YDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
Y+A N+DE+ F ++ + + GWW+ Y GK W P+ Y+
Sbjct: 7 QAYKAENEDEIGFETGVVVEVIQKNLDGWWKIRYQGKE-GWAPATYL 52
>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 = 39.3 bits (92), Expect = 2e-04
Identities = 20/51 (39%), Positives = 29/51 (56%), Gaps = 3/51 (5%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGG--WWRGDYGGKRMHWFPSNYV 837
ALYD+ +L+F K II+ + +++ WW G GG R FP+NYV
Sbjct: 4 ALYDFAGEQPGDLAFQKGDIITILKKSDSQNDWWTGRIGG-REGIFPANYV 53
>gnl|CDD|212868 cd11935, SH3_Nebulette_C, C-terminal Src Homology 3 domain of
Nebulette and LIM-nebulette (or Lasp2). Nebulette is a
cardiac-specific protein that localizes to the Z-disc.
It interacts with tropomyosin and is important in
stabilizing actin thin filaments in cardiac muscles.
Polymorphisms in the nebulette gene are associated with
dilated cardiomyopathy, with some mutations resulting in
severe heart failure. Nebulette is a 107kD protein that
contains an N-terminal acidic region, multiple nebulin
repeats, and a C-terminal SH3 domain. LIM-nebulette,
also called Lasp2 (LIM and SH3 domain protein 2), is an
alternatively spliced variant of nebulette. Although it
shares a gene with nebulette, Lasp2 is not transcribed
from a muscle-specific promoter, giving rise to its
multiple tissue expression pattern with highest amounts
in the brain. It can crosslink actin filaments and it
affects cell spreading. Lasp2 is a 34kD protein
containing an N-terminal LIM domain, three nebulin
repeats, and a C-terminal SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 39.6 bits (92), Expect = 2e-04
Identities = 20/53 (37%), Positives = 29/53 (54%), Gaps = 1/53 (1%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYG-GKRMHWFPSNYV 837
T +A+YDY A+++DE+SF I NV + GW G R P+NY+
Sbjct: 2 TYRAMYDYSAQDEDEVSFRDGDYIVNVQPIDEGWMYGTVQRTGRTGMLPANYI 54
>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 = 39.3 bits (92), Expect = 3e-04
Identities = 16/51 (31%), Positives = 28/51 (54%), Gaps = 4/51 (7%)
Query: 789 ALYDYQARNDDELSFPKHAI--ISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
A +D++A +DELSF K +I + N+ W++ + G + P NY+
Sbjct: 4 AKHDFKATAEDELSFKKGSILKVLNMEDDP-NWYKAELDG-KEGLIPKNYI 52
>gnl|CDD|212758 cd11824, SH3_PSTPIP1, Src homology 3 domain of
Proline-Serine-Threonine Phosphatase-Interacting Protein
1. PSTPIP1, also called CD2 Binding Protein 1 (CD2BP1),
is mainly expressed in hematopoietic cells. It is a
binding partner of the cell surface receptor CD2 and
PTP-PEST, a tyrosine phosphatase which functions in cell
motility and Rac1 regulation. It also plays a role in
the activation of the Wiskott-Aldrich syndrome protein
(WASP), which couples actin rearrangement and T cell
activation. Mutations in the gene encoding PSTPIP1 cause
the autoinflammatory disorder known as PAPA (pyogenic
sterile arthritis, pyoderma gangrenosum, and acne)
syndrome. PSTPIP1 contains an N-terminal F-BAR domain,
PEST motifs, and a C-terminal SH3 domain. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 38.9 bits (91), Expect = 3e-04
Identities = 18/49 (36%), Positives = 28/49 (57%), Gaps = 1/49 (2%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
LYDY A+ DDELS K +++ + + E GWW + G++ P Y+
Sbjct: 4 VLYDYTAQEDDELSISKGDVVAVIEKGEDGWWTVERNGQK-GLVPGTYL 51
>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 = 39.0 bits (91), Expect = 3e-04
Identities = 16/46 (34%), Positives = 24/46 (52%), Gaps = 1/46 (2%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPS 834
A+ Y + + E+S K + ++ EGG+W G G R WFPS
Sbjct: 4 AVKSYSPQEEGEISLHKGDRVKVLSIGEGGFWEGSVRG-RTGWFPS 48
>gnl|CDD|212992 cd12059, SH3_MLK1-3, Src Homology 3 domain of Mixed Lineage Kinases
1, 2, and 3. MLKs 1, 2, and 3 are Serine/Threonine
Kinases (STKs), catalyzing the transfer of the
gamma-phosphoryl group from ATP to S/T residues on
protein substrates. MLKs act as mitogen-activated
protein kinase kinase kinases (MAP3Ks, MKKKs, MAPKKKs),
which phosphorylate and activate MAPK kinases (MAPKKs or
MKKs or MAP2Ks), which in turn phosphorylate and
activate MAPKs during signaling cascades that are
important in mediating cellular responses to
extracellular signals. MLKs play roles in immunity and
inflammation, as well as in cell death, proliferation,
and cell cycle regulation. Little is known about the
specific function of MLK1, also called MAP3K9. It is
capable of activating the c-Jun N-terminal kinase
pathway. Mice lacking both MLK1 and MLK2 are viable,
fertile, and have normal life spans. MLK2, also called
MAP3K10, is abundant in brain, skeletal muscle, and
testis. It functions upstream of the MAPK, c-Jun
N-terminal kinase. It binds hippocalcin, a
calcium-sensor protein that protects neurons against
calcium-induced cell death. Both MLK2 and hippocalcin
may be associated with the pathogenesis of Parkinson's
disease. MLK3, also called MAP3K11, is highly expressed
in breast cancer cells and its signaling through c-Jun
N-terminal kinase has been implicated in the migration,
invasion, and malignancy of cancer cells. It also
functions as a negative regulator of Inhibitor of
Nuclear Factor-KappaB Kinase (IKK) and thus, impacts
inflammation and immunity. MLKs contain an SH3 domain, a
catalytic kinase domain, a leucine zipper, a
proline-rich region, and a CRIB domain that mediates
binding to GTP-bound Cdc42 and Rac. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 39.0 bits (91), Expect = 3e-04
Identities = 21/56 (37%), Positives = 30/56 (53%), Gaps = 8/56 (14%)
Query: 789 ALYDYQARNDDELSFPKHAII------SNVTRAEGGWWRGDYGGKRMHWFPSNYVA 838
A++DY+A +DEL+ + + S V+ E GWW G R+ FPSNYV
Sbjct: 4 AVFDYEASAEDELTLRRGDRVEVLSKDSAVSGDE-GWWTGKIND-RVGIFPSNYVT 57
>gnl|CDD|212798 cd11864, SH3_PEX13_eumet, Src Homology 3 domain of eumetazoan
Peroxisomal biogenesis factor 13. PEX13 is a peroxin
and is required for protein import into the peroxisomal
matrix and membrane. It is an integral membrane protein
that is essential for the localization of PEX14 and the
import of proteins containing the peroxisome matrix
targeting signals, PTS1 and PTS2. Mutations of the PEX13
gene in humans lead to a wide range of peroxisome
biogenesis disorders (PBDs), the most severe of which is
known as Zellweger syndrome (ZS), a severe multisystem
disorder characterized by hypotonia, psychomotor
retardation, and neuronal migration defects. PEX13
contains two transmembrane regions and a C-terminal SH3
domain. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 39.2 bits (92), Expect = 3e-04
Identities = 19/59 (32%), Positives = 28/59 (47%), Gaps = 14/59 (23%)
Query: 788 KALYDYQARNDDELSF---------PKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+A YD+ A ++DELSF PK + V GW G+++ P+NYV
Sbjct: 3 RAEYDFVAESEDELSFRAGDKLRLAPK-ELQPRVR----GWLLATVDGQKIGLVPANYV 56
>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 = 38.8 bits (90), Expect = 4e-04
Identities = 20/52 (38%), Positives = 28/52 (53%), Gaps = 1/52 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVT-RAEGGWWRGDYGGKRMHWFPSNYV 837
V+A+YDY + DELSF + V E GW +G G + +P+NYV
Sbjct: 4 VRAVYDYTGQEPDELSFKAGEELLKVEDEDEQGWCKGVTDGGAVGLYPANYV 55
>gnl|CDD|212957 cd12024, SH3_NoxO1_2, Second or C-terminal Src homology 3 domain of
NADPH oxidase (Nox) Organizing protein 1. Nox
Organizing protein 1 (NoxO1) is a critical regulator of
enzyme kinetics of the nonphagocytic NADPH oxidase Nox1,
which catalyzes the transfer of electrons from NADPH to
molecular oxygen to form superoxide. Nox1 is expressed
in colon, stomach, uterus, prostate, and vascular smooth
muscle cells. NoxO1 is involved in targeting activator
subunits (such as NoxA1) to Nox1. It is co-localized
with Nox1 in the membranes of resting cells and directs
the subcellular localization of Nox1. NoxO1 contains an
N-terminal Phox homology (PX) domain, tandem SH3 domains
(N-SH3 and C-SH3), and a C-terminal proline-rich region
(PRR). This model characterizes the second SH3 domain
(or C-SH3) of NoxO1. The tandem SH3 domains of NoxO1
interact with the PRR of p22phox, which also complexes
with Nox1. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 38.5 bits (90), Expect = 4e-04
Identities = 12/36 (33%), Positives = 22/36 (61%)
Query: 793 YQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKR 828
Y+A+ +DELS P ++ + +++ GWW Y G+
Sbjct: 8 YEAQKEDELSVPAGVVVEVLQKSDNGWWLIRYNGRA 43
>gnl|CDD|212717 cd11783, SH3_SH3RF_3, Third Src Homology 3 domain of SH3 domain
containing ring finger 1 (SH3RF1), SH3RF3, and similar
domains. SH3RF1 (or POSH) and SH3RF3 (or POSH2) are
scaffold proteins that function as E3 ubiquitin-protein
ligases. They contain an N-terminal RING finger domain
and four SH3 domains. This model represents the third
SH3 domain, located in the middle of SH3RF1 and SH3RF3,
and similar domains. SH3RF1 plays a role in calcium
homeostasis through the control of the ubiquitin domain
protein Herp. It may also have a role in regulating
death receptor mediated and JNK mediated apoptosis.
SH3RF3 interacts with p21-activated kinase 2 (PAK2) and
GTP-loaded Rac1. It may play a role in regulating JNK
mediated apoptosis in certain conditions. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 38.5 bits (90), Expect = 5e-04
Identities = 16/57 (28%), Positives = 24/57 (42%), Gaps = 13/57 (22%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHW-------FPSNYVA 838
ALY Y+ + DEL K + + + + GW++G FP NYV
Sbjct: 4 ALYPYKPQKPDELELRKGEMYTVTEKCQDGWFKG------TSLRTGQSGVFPGNYVQ 54
>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 = 38.1 bits (88), Expect = 6e-04
Identities = 17/49 (34%), Positives = 29/49 (59%), Gaps = 1/49 (2%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+Y Y AR+ DE++ K A++ + + GWW+ Y GK W P++Y+
Sbjct: 5 VIYPYTARDQDEINLEKGAVVEVIQKNLEGWWKIRYQGKE-GWAPASYL 52
>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 = 38.1 bits (88), Expect = 7e-04
Identities = 21/53 (39%), Positives = 29/53 (54%), Gaps = 2/53 (3%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGG--KRMHWFPSNYV 837
VK +YD QA NDDEL+F + +I + WW G G +R FP ++V
Sbjct: 2 VKTIYDCQADNDDELTFVEGEVIIVTGEEDQEWWIGHIEGQPERKGVFPVSFV 54
>gnl|CDD|212937 cd12004, SH3_Lyn, Src homology 3 domain of Lyn Protein Tyrosine
Kinase. Lyn is a member of the Src subfamily of
proteins, which are cytoplasmic (or non-receptor) PTKs.
Lyn is expressed in B lymphocytes and myeloid cells. It
exhibits both positive and negative regulatory roles in
B cell receptor (BCR) signaling. Lyn, as well as Fyn and
Blk, promotes B cell activation by phosphorylating ITAMs
(immunoreceptor tyr activation motifs) in CD19 and in Ig
components of BCR. It negatively regulates signaling by
its unique ability to phosphorylate ITIMs
(immunoreceptor tyr inhibition motifs) in cell surface
receptors like CD22 and CD5. Lyn also plays an important
role in G-CSF receptor signaling by phosphorylating a
variety of adaptor molecules. Src kinases contain an
N-terminal SH4 domain with a myristoylation site,
followed by SH3 and SH2 domains, a tyr kinase domain,
and a regulatory C-terminal region containing a
conserved tyr. They are activated by autophosphorylation
at the tyr kinase domain, but are negatively regulated
by phosphorylation at the C-terminal tyr by Csk
(C-terminal Src Kinase). The SH3 domain of Src kinases
contributes to substrate recruitment by binding adaptor
proteins/substrates, and regulation of kinase activity
through an intramolecular interaction. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 38.1 bits (88), Expect = 8e-04
Identities = 21/56 (37%), Positives = 30/56 (53%), Gaps = 2/56 (3%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRG-DYGGKRMHWFPSNYVAEIE 841
V ALY Y ++D+LSF K + V G WW+ K+ + PSNYVA++
Sbjct: 2 VVALYPYDGIHEDDLSFKKGEKL-KVIEEHGEWWKARSLTTKKEGFIPSNYVAKVN 56
>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 = 38.1 bits (88), Expect = 9e-04
Identities = 22/56 (39%), Positives = 30/56 (53%), Gaps = 5/56 (8%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDY---GGKRMHWFPSNYVAEI 840
+A+YDY A ++DE+SF I NV + + GW G G M P+NYV I
Sbjct: 6 RAVYDYNAADEDEVSFQDGDTIVNVQQIDDGWMYGTVERTGDTGM--LPANYVEAI 59
>gnl|CDD|198208 cd10345, SH2_C-SH2_Zap70_Syk_like, C-terminal Src homology 2 (SH2)
domain found in Zeta-chain-associated protein kinase 70
(ZAP-70) and Spleen tyrosine kinase (Syk) proteins.
ZAP-70 and Syk comprise a family of hematopoietic cell
specific protein tyrosine kinases (PTKs) that are
required for antigen and antibody receptor function.
ZAP-70 is expressed in T and natural killer (NK) cells
and Syk is expressed in B cells, mast cells,
polymorphonuclear leukocytes, platelets, macrophages,
and immature T cells. They are required for the proper
development of T and B cells, immune receptors, and
activating NK cells. They consist of two N-terminal Src
homology 2 (SH2) domains and a C-terminal kinase domain
separated from the SH2 domains by a linker or hinge
region. Phosphorylation of both tyrosine residues within
the Immunoreceptor Tyrosine-based Activation Motifs
(ITAM; consensus sequence Yxx[LI]x(7,8)Yxx[LI]) by the
Src-family PTKs is required for efficient interaction of
ZAP-70 and Syk with the receptor subunits and for
receptor function. ZAP-70 forms two phosphotyrosine
binding pockets, one of which is shared by both SH2
domains. In Syk the two SH2 domains do not form such a
phosphotyrosine-binding site. The SH2 domains here are
believed to function independently. In addition, the two
SH2 domains of Syk display flexibility in their relative
orientation, allowing Syk to accommodate a greater
variety of spacing sequences between the ITAM
phosphotyrosines and singly phosphorylated non-classical
ITAM ligands. This model contains the C-terminus SH2
domains of both Syk and Zap70. In general SH2 domains
are involved in signal transduction. They typically
bind pTyr-containing ligands via two surface pockets, a
pTyr and hydrophobic binding pocket, allowing proteins
with SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 95
Score = 38.9 bits (90), Expect = 9e-04
Identities = 33/101 (32%), Positives = 53/101 (52%), Gaps = 8/101 (7%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
WFHG++S R E+E ++ S +G FL+R + G Y+L +G+V H RI K +
Sbjct: 2 WFHGKIS--REESEQIVLIGSKT-NGKFLIRARDN-NGSYALCLLHEGKVLHYRI-DKDK 56
Query: 563 SGQFYLVEKSYFDSLYSLISHYRTNHLRSQEFLITLQEPVP 603
+G+ + E FD+L+ L+ HY ++ L L P
Sbjct: 57 TGKLSIPEGKKFDTLWQLVEHYS---YKADGLLRVLTVPCQ 94
Score = 37.0 bits (85), Expect = 0.004
Identities = 22/77 (28%), Positives = 42/77 (54%), Gaps = 4/77 (5%)
Query: 662 WYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVE--GRL 718
W+H +R ++E +L ++G FL+R + +N SY + E K+ H RI + G+L
Sbjct: 2 WFHGKISREESEQIVLIGSKTNGKFLIRARD-NNGSYALCLLHEGKVLHYRIDKDKTGKL 60
Query: 719 YTIGTTQFESLVELISY 735
+F++L +L+ +
Sbjct: 61 SIPEGKKFDTLWQLVEH 77
Score = 30.8 bits (69), Expect = 0.73
Identities = 11/35 (31%), Positives = 21/35 (60%), Gaps = 1/35 (2%)
Query: 613 WYHPTATRSQAE-DLLRRVPSDGAFLVRPSENDNS 646
W+H +R ++E +L ++G FL+R +N+ S
Sbjct: 2 WFHGKISREESEQIVLIGSKTNGKFLIRARDNNGS 36
>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 = 37.3 bits (86), Expect = 0.001
Identities = 17/53 (32%), Positives = 33/53 (62%), Gaps = 1/53 (1%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAEI 840
+A+YD++A+ ELSF K + + + + W+ G++ G R+ FP +YV ++
Sbjct: 4 RAVYDFKAQTSKELSFKKGDTVYILRKIDQNWYEGEHHG-RVGIFPISYVEKL 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 = 36.7 bits (85), Expect = 0.002
Identities = 15/50 (30%), Positives = 22/50 (44%), Gaps = 1/50 (2%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNY 836
ALYD+ +++LSF + I + W RG G R FP +
Sbjct: 2 AVALYDFTGETEEDLSFQRGDRILVTEHLDAEWSRGRLNG-REGIFPRAF 50
>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 = 36.9 bits (85), Expect = 0.002
Identities = 23/51 (45%), Positives = 28/51 (54%), Gaps = 2/51 (3%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRA-EGGWWRGDYGGKRMHWFPSNYV 837
KA+Y +A + ELSF AI +VT + E GW G GKR P NYV
Sbjct: 3 KAVYPCEAEHSSELSFEVGAIFEDVTLSREPGWLEGTLNGKR-GLIPENYV 52
>gnl|CDD|212926 cd11993, SH3_Intersectin1_4, Fourth Src homology 3 domain (or SH3D)
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 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 = 65
Score = 37.0 bits (85), Expect = 0.002
Identities = 19/54 (35%), Positives = 28/54 (51%), Gaps = 4/54 (7%)
Query: 793 YQARNDDELSFPKHAIISNVTRAEGGWWRGDY---GGKR-MHWFPSNYVAEIEP 842
Y A ++L+ +I + GGWW G+ G KR + WFP+NYV + P
Sbjct: 12 YTATGPEQLTLAPGQLILIRKKNPGGWWEGELQARGKKRQIGWFPANYVKLLSP 65
>gnl|CDD|198279 cd10416, SH2_SH2D2A, Src homology 2 domain found in the SH2 domain
containing protein 2A (SH2D2A). SH2D2A contains a
single SH2 domain. In general SH2 domains are involved
in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 102
Score = 38.1 bits (88), Expect = 0.002
Identities = 28/84 (33%), Positives = 47/84 (55%), Gaps = 7/84 (8%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKH---CRIRVEGRL 718
W+H TR +AE LL P G +LVR SE+ ++V+++R+ +H ++R +GR
Sbjct: 9 WFHGFITRREAERLLEPKPQ-GCYLVRFSES-AVTFVLTYRSRTCCRHFLLAQLR-DGRH 65
Query: 719 YTIGT-TQFESLVELISYYERHPL 741
+G + L +L+ +Y HPL
Sbjct: 66 VVLGEDSAHARLQDLLLHYTAHPL 89
Score = 28.1 bits (62), Expect = 7.4
Identities = 15/31 (48%), Positives = 19/31 (61%), Gaps = 1/31 (3%)
Query: 613 WYHPTATRSQAEDLLRRVPSDGAFLVRPSEN 643
W+H TR +AE LL P G +LVR SE+
Sbjct: 9 WFHGFITRREAERLLEPKPQ-GCYLVRFSES 38
>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 = 36.3 bits (84), Expect = 0.002
Identities = 17/53 (32%), Positives = 28/53 (52%), Gaps = 1/53 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
V AL+ Y+A ++L F K +I +++ W G GK + FPS +V +
Sbjct: 2 VVALFSYEASQPEDLEFQKGDVILVLSKVNEDWLEGQCKGK-IGIFPSAFVED 53
>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 = 36.2 bits (84), Expect = 0.003
Identities = 14/52 (26%), Positives = 26/52 (50%), Gaps = 1/52 (1%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+AL+D+ + +EL F +I + ++ WW G WFP+++V
Sbjct: 1 LAEALWDHVTMDPEELGFKAGDVIEVLDMSDKDWWWGSI-RDEEGWFPASFV 51
>gnl|CDD|212919 cd11986, SH3_Stac3_1, First C-terminal Src homology 3 domain of SH3
and cysteine-rich domain-containing protein 3 (Stac3).
Stac proteins are putative adaptor proteins that contain
a cysteine-rich C1 domain and one or two SH3 domains at
the C-terminus. There are three mammalian members
(Stac1, Stac2, and Stac3) of this family. Stac1 and
Stac3 contain two SH3 domains while Stac2 contains a
single SH3 domain at the C-terminus. Stac1 and Stac2
have been found to be expressed differently in mature
dorsal root ganglia (DRG) neurons. Stac1 is mainly
expressed in peptidergic neurons while Stac2 is found in
a subset of nonpeptidergic and all trkB+ neurons. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 36.0 bits (83), Expect = 0.003
Identities = 17/49 (34%), Positives = 26/49 (53%), Gaps = 1/49 (2%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
ALY ++A D+L F I+ + + WWRG G K +FP N++
Sbjct: 4 ALYRFKALEKDDLDFHPGERITVIDDSNEEWWRGKIGEK-TGYFPMNFI 51
>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 = 36.1 bits (83), Expect = 0.004
Identities = 18/51 (35%), Positives = 30/51 (58%), Gaps = 3/51 (5%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMH-WFPSNYV 837
KALY+Y+ + +L F K II + + W+ G+ G +H +FP+N+V
Sbjct: 4 KALYNYEGKEPGDLKFSKGDIIILRRQVDENWYHGEVNG--IHGFFPTNFV 52
>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 = 35.8 bits (83), Expect = 0.004
Identities = 18/50 (36%), Positives = 28/50 (56%), Gaps = 1/50 (2%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+A Y++ A ELSF K +I+ R + W+ G GG++ FP +YV
Sbjct: 3 RAKYNFNADTGVELSFRKGDVITLTRRVDENWYEGRIGGRQ-GIFPVSYV 51
>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 = 36.1 bits (83), Expect = 0.004
Identities = 19/54 (35%), Positives = 28/54 (51%), Gaps = 1/54 (1%)
Query: 785 ITVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRG-DYGGKRMHWFPSNYV 837
+ +ALY Y +NDDEL I+ + + + GW+ G K+ FP NYV
Sbjct: 2 YSYQALYSYAPQNDDELELRDGDIVDVMEKCDDGWFVGTSRRTKQFGTFPGNYV 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 = 35.9 bits (83), Expect = 0.004
Identities = 13/49 (26%), Positives = 27/49 (55%), Gaps = 1/49 (2%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
ALY ++ + +++L I+ + + WW+G R+ +FP+N+V
Sbjct: 4 ALYKFKPQENEDLEMRPGDKITLLDDSNEDWWKGKI-EDRVGFFPANFV 51
>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 = 35.4 bits (82), Expect = 0.006
Identities = 20/58 (34%), Positives = 29/58 (50%), Gaps = 11/58 (18%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGW-----WR-GDYGGKRMHWFPSNYVAE 839
+ALY Y +N+DEL + I+ + + + GW R G +G FP NYVA
Sbjct: 3 RALYSYTPQNEDELELREGDIVYVMEKCDDGWFVGTSERTGLFGT-----FPGNYVAR 55
>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 = 35.4 bits (81), Expect = 0.006
Identities = 17/54 (31%), Positives = 29/54 (53%), Gaps = 2/54 (3%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGG--WWRGDYGGKRMHWFPSNYV 837
V+ALY + + ND+EL+F K ++ + + E WW+ ++ P NYV
Sbjct: 2 VVQALYPFSSSNDEELNFEKGEVMDVIEKPENDPEWWKCRKANGQVGLVPKNYV 55
>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 = 35.5 bits (81), Expect = 0.007
Identities = 22/51 (43%), Positives = 26/51 (50%), Gaps = 2/51 (3%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRA-EGGWWRGDYGGKRMHWFPSNYV 837
KALY +A +D ELSF + NV + E GW G GK P NYV
Sbjct: 4 KALYACKAEHDSELSFTAGTVFDNVHPSQEPGWLEGTLNGK-TGLIPENYV 53
>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 = 35.4 bits (81), Expect = 0.007
Identities = 20/49 (40%), Positives = 26/49 (53%), Gaps = 2/49 (4%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
ALY Y + +L+F + I VT+ +G WW G R FPSNYV
Sbjct: 4 ALYPYSSSEPGDLTFNEGEEIL-VTQKDGEWWTGSI-EDRTGIFPSNYV 50
>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 = 35.4 bits (81), Expect = 0.008
Identities = 19/54 (35%), Positives = 29/54 (53%), Gaps = 1/54 (1%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRG-DYGGKRMHWFPSNYVAEI 840
+ALY+Y RN+DEL + +I + + + GW+ G K FP NYV +
Sbjct: 8 QALYNYMPRNEDELELREGDVIDVMEKCDDGWFVGTSRRTKFFGTFPGNYVKRL 61
>gnl|CDD|198222 cd10359, SH2_SH3BP2, Src homology 2 domain found in c-Abl SH3
domain-binding protein-2 (SH3BP2). The adaptor protein
3BP2/SH3BP2 plays a regulatory role in signaling from
immunoreceptors. The protein-tyrosine kinase Syk
phosphorylates 3BP2 which results in the activation of
Rac1 through the interaction with the SH2 domain of Vav1
and induces the binding to the SH2 domain of the
upstream protein-tyrosine kinase Lyn and enhances its
kinase activity. 3BP2 has a positive regulatory role in
IgE-mediated mast cell activation. In lymphocytes,
engagement of T cell or B cell receptors triggers
tyrosine phosphorylation of 3BP2. Suppression of the
3BP2 expression by siRNA results in the inhibition of T
cell or B cell receptor-mediated activation of NFAT.
3BP2 is required for the proliferation of B cells and B
cell receptor signaling. Mutations in the 3BP2 gene are
responsible for cherubism resulting in excessive bone
resorption in the jaw. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 101
Score = 36.5 bits (84), Expect = 0.008
Identities = 36/95 (37%), Positives = 46/95 (48%), Gaps = 9/95 (9%)
Query: 514 EAEDLLRRYSHLG---DGTFLVRESETFIGDYSLSFWWQG--RVNHCRIRSKPESGQFYL 568
E E L + S G DG + +R S T G L W G +V + RI K +FYL
Sbjct: 11 EVERLFKATSPKGGPQDGLYCIRNSST-KGGKVLVVWDGGAEKVRNYRIFEK--DCKFYL 67
Query: 569 VEKSYFDSLYSLISHYRTNHLRSQEFLITLQEPVP 603
E+ F SL SL+ HY T+ L S L TL+ P
Sbjct: 68 HEREVFSSLGSLVEHYATHVLPSHTSL-TLRVPYG 101
Score = 32.6 bits (74), Expect = 0.19
Identities = 20/85 (23%), Positives = 33/85 (38%), Gaps = 9/85 (10%)
Query: 665 PTATRSQAEDLLRRV-----PSDGAFLVRPSENDNSSYVISFRAE--DKIKHCRI-RVEG 716
T + E L + P DG + +R S V+ +K+++ RI +
Sbjct: 5 NTMESREVERLFKATSPKGGPQDGLYCIRNSST-KGGKVLVVWDGGAEKVRNYRIFEKDC 63
Query: 717 RLYTIGTTQFESLVELISYYERHPL 741
+ Y F SL L+ +Y H L
Sbjct: 64 KFYLHEREVFSSLGSLVEHYATHVL 88
>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 = 35.0 bits (80), Expect = 0.008
Identities = 19/51 (37%), Positives = 28/51 (54%), Gaps = 3/51 (5%)
Query: 788 KALYDYQARNDDELSFPKHAII--SNVTRAEGGWWRGDYGGKRMHWFPSNY 836
+ALY ++AR+ DE++ I+ E GW G+ GK WFP+NY
Sbjct: 3 RALYPFEARSHDEITIQPGDIVMVDESQTGEPGWLGGELKGK-TGWFPANY 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 = 35.0 bits (80), Expect = 0.008
Identities = 16/53 (30%), Positives = 28/53 (52%), Gaps = 1/53 (1%)
Query: 785 ITVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ +AL+D+ +D EL+F +I + + WW G R WFP+++V
Sbjct: 1 VYAEALWDHVTMDDQELAFKAGDVIRVLEASNKDWWWGR-NEDREAWFPASFV 52
>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 = 35.0 bits (81), Expect = 0.009
Identities = 15/53 (28%), Positives = 26/53 (49%)
Query: 785 ITVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
V+AL+D+ +D++L F K I++ + + E WW + P YV
Sbjct: 1 EYVRALFDFPGNDDEDLPFKKGEILTVIRKPEEQWWNARNSEGKTGMIPVPYV 53
>gnl|CDD|212952 cd12019, SH3_Tks5_4, Fourth 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 fourth 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 = 34.6 bits (79), Expect = 0.011
Identities = 16/47 (34%), Positives = 23/47 (48%), Gaps = 1/47 (2%)
Query: 793 YQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
YQ D E+SFP + + + E GWW +G W PS+Y+
Sbjct: 8 YQKVQDSEISFPAGVEVEVLEKQESGWWYVRFGELE-GWAPSHYLEL 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 = 34.7 bits (80), Expect = 0.011
Identities = 12/35 (34%), Positives = 23/35 (65%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWR 821
KALYDY+ + +DEL+ + I+ + +++ WW+
Sbjct: 2 YKALYDYEPQTEDELTIQEDDILYLLEKSDDDWWK 36
>gnl|CDD|212942 cd12009, SH3_Blk, Src homology 3 domain of Blk Protein Tyrosine
Kinase. Blk is a member of the Src subfamily of
proteins, which are cytoplasmic (or non-receptor) PTKs.
It is expressed specifically in B-cells and is involved
in pre-BCR (B-cell receptor) signaling. Src kinases
contain an N-terminal SH4 domain with a myristoylation
site, followed by SH3 and SH2 domains, a tyr kinase
domain, and a regulatory C-terminal region containing a
conserved tyr. They are activated by autophosphorylation
at the tyr kinase domain, but are negatively regulated
by phosphorylation at the C-terminal tyr by Csk
(C-terminal Src Kinase). The SH3 domain of Src kinases
contributes to substrate recruitment by binding adaptor
proteins/substrates, and regulation of kinase activity
through an intramolecular interaction. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 54
Score = 34.4 bits (79), Expect = 0.013
Identities = 17/54 (31%), Positives = 26/54 (48%), Gaps = 2/54 (3%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRG-DYGGKRMHWFPSNYVA 838
V A YD+ N+ +L K + V +++G WW + + PSNYVA
Sbjct: 1 CVIAQYDFVPSNERDLQLKKGEKL-QVLKSDGEWWLAKSLTTGKEGYIPSNYVA 53
>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 = 34.6 bits (80), Expect = 0.013
Identities = 11/24 (45%), Positives = 16/24 (66%)
Query: 786 TVKALYDYQARNDDELSFPKHAII 809
V+A +DY A + DEL+F K +I
Sbjct: 4 KVRATHDYTAEDTDELTFEKGDVI 27
>gnl|CDD|212851 cd11918, SH3_Vinexin_3, Third (or C-terminal) Src Homology 3 domain
of Vinexin, also called Sorbin and SH3 domain containing
3 (Sorbs3). Vinexin is also called Sorbs3, SH3P3, and
SH3-containing adapter molecule 1 (SCAM-1). It is an
adaptor protein containing one sorbin homology (SoHo)
and three SH3 domains. Vinexin was first identified as a
vinculin binding protein; it is co-localized with
vinculin at cell-ECM and cell-cell adhesion sites. There
are several splice variants of vinexin: alpha, which
contains the SoHo and three SH3 domains and displays
tissue-specific expression; and beta, which contains
only the three SH3 domains and is widely expressed.
Vinexin alpha stimulates the accumulation of F-actin at
focal contact sites. Vinexin also promotes keratinocyte
migration and wound healing. The SH3 domains of vinexin
have been reported to bind a number of ligands including
vinculin, WAVE2, DLG5, Abl, and Cbl. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 58
Score = 34.2 bits (78), Expect = 0.016
Identities = 17/54 (31%), Positives = 30/54 (55%), Gaps = 1/54 (1%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRG-DYGGKRMHWFPSNYVAEI 840
KA+Y Y+ +N+DEL + + + + + GW+ G ++ FP NYVA +
Sbjct: 5 KAVYQYRPQNEDELELREGDRVDVMQQCDDGWFVGVSRRTQKFGTFPGNYVAPV 58
>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 = 34.2 bits (79), Expect = 0.018
Identities = 17/53 (32%), Positives = 22/53 (41%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
V ALYD+Q +L K + + WWR + PSNYV E
Sbjct: 2 VVALYDFQPIEPGDLPLEKGEEYVVLDDSNEHWWRARDKNGNEGYIPSNYVTE 54
>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 = 33.6 bits (77), Expect = 0.022
Identities = 15/52 (28%), Positives = 27/52 (51%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
KALYDY + ++ELSF + + ++ W + G + + P+NY+
Sbjct: 1 QAKALYDYDKQTEEELSFNEGDTLDVYDDSDSDWILVGFNGTQFGFVPANYI 52
>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 = 33.8 bits (77), Expect = 0.023
Identities = 16/38 (42%), Positives = 20/38 (52%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGG 826
A +DY R+ ELSF K A + RA WW G + G
Sbjct: 4 AKFDYVGRSARELSFKKGASLLLYHRASDDWWEGRHNG 41
>gnl|CDD|240156 cd05030, calgranulins, Calgranulins: S-100 domain found in proteins
belonging to the Calgranulin subgroup of the S100 family
of EF-hand calcium-modulated proteins, including S100A8,
S100A9, and S100A12 . Note that the S-100 hierarchy, to
which this Calgranulin group belongs, contains only
S-100 EF-hand domains, other EF-hands have been modeled
separately. These proteins are expressed mainly in
granulocytes, and are involved in inflammation, allergy,
and neuritogenesis, as well as in host-parasite
response. Calgranulins are modulated not only by
calcium, but also by other metals such as zinc and
copper. Structural data suggested that calgranulins may
exist in multiple structural forms, homodimers, as well
as hetero-oligomers. For example, the S100A8/S100A9
complex called calprotectin plays important roles in the
regulation of inflammatory processes, wound repair, and
regulating zinc-dependent enzymes as well as microbial
growth.
Length = 88
Score = 34.6 bits (80), Expect = 0.023
Identities = 18/71 (25%), Positives = 38/71 (53%), Gaps = 12/71 (16%)
Query: 117 HFYSL-EGPRETVNLKDIK--------TFLPRVNCKMSTNKLREHFQEVDTRKTNELAFD 167
H YS+ +G +T+ K+ K FL + + + +K+ F+++DT + +L+F+
Sbjct: 15 HQYSVRKGHPDTLYKKEFKQLVEKELPNFLKKEKNQKAIDKI---FEDLDTNQDGQLSFE 71
Query: 168 EFSILYNRIMF 178
EF +L ++
Sbjct: 72 EFLVLVIKVGV 82
>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 = 33.7 bits (77), Expect = 0.024
Identities = 16/38 (42%), Positives = 24/38 (63%), Gaps = 5/38 (13%)
Query: 788 KALYDYQARNDDELSFPKHAIIS----NVTRAEGGWWR 821
+ALYD +A DEL+F + I++ NV +E GWW+
Sbjct: 4 RALYDNKADCSDELAFRRGDILTVLEQNVPGSE-GWWK 40
>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 = 33.9 bits (78), Expect = 0.026
Identities = 16/56 (28%), Positives = 29/56 (51%), Gaps = 3/56 (5%)
Query: 784 SITVKALYDYQARNDDELSFPKHAIISNVTRAEG-GWWRG-DYGGKRMHWFPSNYV 837
+T K LY Y+A+ DEL+ + + + +G GW + + G + + P NY+
Sbjct: 1 PVTCKVLYSYEAQRPDELTITEGEELEVIEDGDGDGWVKARNKSG-EVGYVPENYL 55
>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 = 33.5 bits (77), Expect = 0.026
Identities = 15/50 (30%), Positives = 27/50 (54%), Gaps = 1/50 (2%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ L D A+ D+EL + +++ + GW+RG+ G+R FP +V
Sbjct: 3 RVLQDLSAQLDEELDLREGDVVTITGILDKGWFRGELNGRR-GIFPEGFV 51
>gnl|CDD|241519 cd13365, PH_PLC_plant-like, Plant-like Phospholipase C (PLC)
pleckstrin homology (PH) domain. PLC-gamma (PLCgamma)
was the second class of PLC discovered. PLC-gamma
consists of an N-terminal PH domain, a EF hand domain, a
catalytic domain split into X and Y halves internal to
which is a PH domain split by two SH2 domains and a
single SH3 domain, and a C-terminal C2 domain. PLCs (EC
3.1.4.3) play a role in the initiation of cellular
activation, proliferation, differentiation and
apoptosis. They are central to inositol lipid signalling
pathways, facilitating intracellular Ca2+ release and
protein kinase C (PKC) activation. Specificaly, PLCs
catalyze the cleavage of
phosphatidylinositol-4,5-bisphosphate (PIP2) and result
in the release of 1,2-diacylglycerol (DAG) and inositol
1,4,5-triphosphate (IP3). These products trigger the
activation of protein kinase C (PKC) and the release of
Ca2+ from intracellular stores. There are fourteen kinds
of mammalian phospholipase C proteins which are are
classified into six isotypes (beta, gamma, delta,
epsilon, zeta, eta). This cd contains PLC members from
fungi and plants. PH domains have diverse functions, but
in general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 115
Score = 35.3 bits (82), Expect = 0.026
Identities = 16/70 (22%), Positives = 28/70 (40%), Gaps = 9/70 (12%)
Query: 31 VDMREVKEVRVGKCFKDFDR--WPEESGRVDAARCFIVLYGSEFKLKTLSIAAFSEKECG 88
V + V + G+ F+R P + F ++Y ++L + +E
Sbjct: 52 VRLSSVSRIIPGQRTVVFERPPPPGL-----EEQSFSIIYADG--ERSLDLTCKDRQEFD 104
Query: 89 LWVTGLRYLV 98
W TGLR L+
Sbjct: 105 TWFTGLRALL 114
>gnl|CDD|212950 cd12017, SH3_Tks_3, Third Src homology 3 domain of Tyrosine kinase
substrate (Tks) proteins. Tks proteins are Src
substrates and scaffolding proteins that play important
roles in the formation of podosomes and invadopodia, the
dynamic actin-rich structures that are related to cell
migration and cancer cell invasion. Vertebrates contain
two Tks proteins, Tks4 (Tyr kinase substrate with four
SH3 domains) and Tks5 (Tyr kinase substrate with five
SH3 domains), which display partially overlapping but
non-redundant functions. Both associate with the ADAMs
family of transmembrane metalloproteases, which function
as sheddases and mediators of cell and matrix
interactions. Tks5 interacts with N-WASP and Nck, while
Tks4 is essential for the localization of MT1-MMP
(membrane-type 1 matrix metalloproteinase) to
invadopodia. Tks proteins contain an N-terminal Phox
homology (PX) domain and four or five SH3 domains. This
model characterizes the third SH3 domain of Tks
proteins. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 33.6 bits (77), Expect = 0.027
Identities = 15/48 (31%), Positives = 24/48 (50%), Gaps = 1/48 (2%)
Query: 792 DYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
++QA D +SF K + + + GWW GK W PS+Y+ +
Sbjct: 7 EFQATIQDGISFQKGQKVEVIDKNPSGWWYVKIDGKE-GWAPSSYIEK 53
>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 = 33.6 bits (77), Expect = 0.028
Identities = 16/52 (30%), Positives = 26/52 (50%), Gaps = 1/52 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMH-WFPSNYV 837
VKA+Y + + +L F + +I ++ +G WW G FPSN+V
Sbjct: 2 VKAVYSWAGETEGDLGFLEGDLIEVLSIGDGSWWSGKLRRNGAEGIFPSNFV 53
>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 = 33.5 bits (76), Expect = 0.029
Identities = 18/44 (40%), Positives = 25/44 (56%), Gaps = 3/44 (6%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTR---AEGGWWRGDYGGK 827
V AL+DY+A+N DELSF + I+ + R +E WW K
Sbjct: 3 VYALWDYEAQNADELSFQEGDAITILRRKDDSETEWWWARLNDK 46
>gnl|CDD|212741 cd11807, SH3_ASPP, Src homology 3 domain of Apoptosis Stimulating
of p53 proteins (ASPP). The ASPP family of proteins
bind to important regulators of apoptosis (p53, Bcl-2,
and RelA) and cell growth (APCL, PP1). They share
similarity at their C-termini, where they harbor a
proline-rich region, four ankyrin (ANK) repeats, and an
SH3 domain. Vertebrates contain three members of the
family: ASPP1, ASPP2, and iASPP. ASPP1 and ASPP2
activate the apoptotic function of the p53 family of
tumor suppressors (p53, p63, and p73), while iASPP is an
oncoprotein that specifically inhibits p53-induced
apoptosis. The expression of ASPP proteins is altered in
tumors; ASPP1 and ASPP2 are downregulated whereas iASPP
is upregulated is some cancer types. ASPP proteins also
bind and regulate protein phosphatase 1 (PP1), and this
binding is competitive with p53 binding. The SH3 domain
and the ANK repeats of ASPP contribute to the p53
binding site; they bind to the DNA binding domain of
p53. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 57
Score = 33.5 bits (77), Expect = 0.030
Identities = 18/55 (32%), Positives = 27/55 (49%), Gaps = 4/55 (7%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTR---AEGGWWRGDYGGKRMHWFPSNYVA 838
V AL+DY+A N DELSF + ++ + + E WW K + P N +
Sbjct: 3 VYALFDYEAENGDELSFREGDELTVLRKGDDDETEWWWARLNDKE-GYVPRNLLG 56
>gnl|CDD|212769 cd11835, SH3_ARHGAP32_33, Src homology 3 domain of Rho
GTPase-activating proteins 32 and 33, and similar
proteins. Members of this family contain N-terminal PX
and Src Homology 3 (SH3) domains, a central Rho GAP
domain, and C-terminal extensions. RhoGAPs (or ARHGAPs)
bind to Rho proteins and enhance the hydrolysis rates of
bound GTP. ARHGAP32 is also called RICS, PX-RICS,
p250GAP, or p200RhoGAP. It is a Rho GTPase-activating
protein for Cdc42 and Rac1, and is implicated in the
regulation of postsynaptic signaling and neurite
outgrowth. PX-RICS, a variant of RICS that contain PX
and SH3 domains, is the main isoform expressed during
neural development. It is involved in neural functions
including axon and dendrite extension, postnatal
remodeling, and fine-tuning of neural circuits during
early brain development. ARHGAP33, also called sorting
nexin 26 or TCGAP (Tc10/CDC42 GTPase-activating
protein), is widely expressed in the brain where it is
involved in regulating the outgrowth of axons and
dendrites and is regulated by the protein tyrosine
kinase Fyn. It is translocated to the plasma membrane in
adipocytes in response to insulin and may be involved in
the regulation of insulin-stimulated glucose transport.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 33.6 bits (77), Expect = 0.030
Identities = 18/48 (37%), Positives = 24/48 (50%), Gaps = 4/48 (8%)
Query: 793 YQARNDDELSFPKHAIISNV---TRAEGGWWRGDYGGKRMHWFPSNYV 837
Y A+ DELS I+S + E WWRG G ++ +FPS V
Sbjct: 8 YTAQAPDELSLEVGDIVSVIDMPPPEESTWWRGKK-GFQVGFFPSECV 54
>gnl|CDD|212859 cd11926, SH3_SH3RF1_3, Third Src Homology 3 domain of SH3 domain
containing ring finger 1, an E3 ubiquitin-protein
ligase. SH3RF1 is also called POSH (Plenty of SH3s) or
SH3MD2 (SH3 multiple domains protein 2). It is a
scaffold protein that acts as an E3 ubiquitin-protein
ligase. It plays a role in calcium homeostasis through
the control of the ubiquitin domain protein Herp. It may
also have a role in regulating death receptor mediated
and JNK mediated apoptosis. SH3RF1 also enhances the
ubiquitination of ROMK1 potassium channel resulting in
its increased endocytosis. It contains an N-terminal
RING finger domain and four SH3 domains. This model
represents the third SH3 domain, located in the middle,
of SH3RF1. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 33.4 bits (76), Expect = 0.030
Identities = 18/51 (35%), Positives = 26/51 (50%), Gaps = 1/51 (1%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRG-DYGGKRMHWFPSNYVA 838
A+Y Y R +DEL K + R + GW++G ++ FP NYVA
Sbjct: 4 AIYPYTPRKEDELELRKGEMFLVFERCQDGWFKGTSMHTSKIGVFPGNYVA 54
>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 = 33.2 bits (76), Expect = 0.031
Identities = 17/51 (33%), Positives = 28/51 (54%), Gaps = 1/51 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
V ALYDYQ ++ E+S K I++ + + WW+ + R + P+ YV
Sbjct: 2 VVALYDYQEKSPREVSMKKGDILTLLNSSNKDWWKVEVND-RQGFVPAAYV 51
>gnl|CDD|212885 cd11952, SH3_iASPP, Src Homology 3 (SH3) domain of Inhibitor of
ASPP protein (iASPP). iASPP, also called
RelA-associated inhibitor (RAI), is an oncoprotein that
inhibits the apoptotic transactivation potential of p53.
It is upregulated in human breast cancers expressing
wild-type p53, in acute leukemias regardless of the p53
mutation status, as well as in ovarian cancer where it
is associated with poor patient outcome and
chemoresistance. iASPP is also a binding partner and
negative regulator of p65RelA, which promotes cell
proliferation and inhibits apoptosis; p65RelA has the
opposite effect on cell growth compared to the p53
family. It contains a proline-rich region, four ankyrin
(ANK) repeats, and an SH3 domain at its C-terminal half.
The SH3 domain and the ANK repeats of iASPP contribute
to the p53 binding site; they bind to the DNA binding
domain of p53. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 56
Score = 33.4 bits (76), Expect = 0.033
Identities = 18/52 (34%), Positives = 26/52 (50%), Gaps = 3/52 (5%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTR--AEGGWWRGDYGGKRMHWFPSNY 836
V AL+DY A DELSF + +++ + + WW G R + P NY
Sbjct: 3 VYALWDYSAEFPDELSFKEGDMVTVLRKDGEGTDWWWASLCG-REGYVPRNY 53
>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 = 33.4 bits (77), Expect = 0.034
Identities = 18/55 (32%), Positives = 24/55 (43%), Gaps = 2/55 (3%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEG--GWWRGDYGGKRMHWFPSNYVAE 839
V ALY + ND+ELSF K + + + E WW+ P NYV
Sbjct: 2 VVALYPFTGENDEELSFEKGERLEIIEKPEDDPDWWKARNALGTTGLVPRNYVEV 56
>gnl|CDD|176507 cd08564, GDPD_GsGDE_like, Glycerophosphodiester phosphodiesterase
domain of putative Galdieria sulphuraria
glycerophosphodiester phosphodiesterase and similar
proteins. This subfamily corresponds to the
glycerophosphodiester phosphodiesterase domain (GDPD)
present in putative Galdieria sulphuraria
glycerophosphodiester phosphodiesterase (GsGDE, EC
3.1.4.46) and its uncharacterized eukaryotic homologs.
Members in this family show high sequence similarity to
Escherichia coli GP-GDE, which catalyzes the degradation
of glycerophosphodiesters to produce
sn-glycerol-3-phosphate (G3P) and the corresponding
alcohols.
Length = 265
Score = 36.7 bits (85), Expect = 0.041
Identities = 17/70 (24%), Positives = 28/70 (40%), Gaps = 5/70 (7%)
Query: 288 DQFSSESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVYHG----HTLTTKIKFKD-VVKT 342
E++ ++ R L G +ELD + D +V+HG T I+ D K
Sbjct: 15 STLYPENTLPSFRRALEIGVDGVELDVFLTKDNEIVVFHGTEDDTNPDTSIQLDDSGFKN 74
Query: 343 IRDHAFETSK 352
I D + +
Sbjct: 75 INDLSLDEIT 84
>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 = 33.2 bits (76), Expect = 0.041
Identities = 17/54 (31%), Positives = 27/54 (50%), Gaps = 1/54 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMH-WFPSNYVAE 839
V+ + Y+A+ +DEL+ K II ++ GW G WFP ++V E
Sbjct: 2 VQCIRSYKAQENDELTLEKADIIMVRQQSSDGWLEGVRLSDGERGWFPQSHVEE 55
>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 = 32.8 bits (75), Expect = 0.042
Identities = 16/50 (32%), Positives = 27/50 (54%), Gaps = 1/50 (2%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
A +D++ +DELSF + +I+ W +G+ GK + FP N+V
Sbjct: 3 VARFDFEGEQEDELSFSEGDVITLKEYVGEEWAKGELNGK-IGIFPLNFV 51
>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 = 33.1 bits (75), Expect = 0.043
Identities = 17/50 (34%), Positives = 28/50 (56%), Gaps = 2/50 (4%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVT-RAEGGWWRGDYGGKRMHWFPSNYV 837
A YD++A DDELSF + I+ + + W++ + GK + P NY+
Sbjct: 5 AKYDFKATADDELSFKRGDILKVLNEECDQNWYKAELNGKD-GFIPKNYI 53
>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 = 33.1 bits (76), Expect = 0.046
Identities = 18/54 (33%), Positives = 26/54 (48%), Gaps = 2/54 (3%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNV-TRAEGGWWRG-DYGGKRMHWFPSNYV 837
VKALY + A + +LSF + +I+ + GW G + R WFP Y
Sbjct: 2 RVKALYPHAAGGETQLSFEEGDVITLLGPEPRDGWHYGENERSGRRGWFPIAYT 55
>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 = 33.1 bits (76), Expect = 0.050
Identities = 22/61 (36%), Positives = 30/61 (49%), Gaps = 8/61 (13%)
Query: 787 VKALYDY----QARNDD---ELSFPKHAIISNV-TRAEGGWWRGDYGGKRMHWFPSNYVA 838
+ ALYDY + NDD ELSF ++ E G++ G+ G R PSN+V
Sbjct: 2 MVALYDYNPETMSPNDDPEEELSFHAGDVVRVYGPMDEDGFYYGELEGGRKGLVPSNFVQ 61
Query: 839 E 839
E
Sbjct: 62 E 62
>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 = 33.0 bits (75), Expect = 0.052
Identities = 21/53 (39%), Positives = 28/53 (52%), Gaps = 2/53 (3%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGK--RMHWFPSNYV 837
VKALY+ A N DEL+F + II + WW G G+ R FP ++V
Sbjct: 2 VKALYNCVADNPDELTFSEGEIIIVDGEEDKEWWIGHIDGEPTRRGAFPVSFV 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 = 32.6 bits (74), Expect = 0.057
Identities = 15/50 (30%), Positives = 26/50 (52%), Gaps = 1/50 (2%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
KALY Y+ + +L F K II + + W+ G+ G + P++Y+
Sbjct: 4 KALYSYEGKEPGDLKFNKGDIIILRRKVDENWYHGELNGCH-GFLPASYI 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 = 32.5 bits (74), Expect = 0.057
Identities = 17/51 (33%), Positives = 26/51 (50%), Gaps = 4/51 (7%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEG--GWWRGDYGGKRMHWFPSNYV 837
ALY +QA DEL F K I+ + E W++ + G+ + P NY+
Sbjct: 4 ALYSFQATESDELPFQKGDIL-KILNMEDDQNWYKAELQGRE-GYIPKNYI 52
>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 = 32.5 bits (74), Expect = 0.068
Identities = 16/54 (29%), Positives = 30/54 (55%), Gaps = 7/54 (12%)
Query: 789 ALYDYQARNDDELSFPKHAII-----SNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
A+Y ++AR+ +ELS + + S++T WW + G++ + PSNY+
Sbjct: 4 AVYTFKARSPNELSVSANQRVRILEFSDLT-GNKEWWLAEANGQK-GYVPSNYI 55
>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 = 33.1 bits (75), Expect = 0.068
Identities = 17/58 (29%), Positives = 28/58 (48%), Gaps = 7/58 (12%)
Query: 783 ASITVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRG---DYGGKRMHWFPSNYV 837
+ + +AL+D+ +D EL F +I + WW G D G WFP+++V
Sbjct: 16 SVVCAEALWDHVTMDDQELGFKAGDVIEVMDATNKEWWWGRVLDSEG----WFPASFV 69
>gnl|CDD|198181 cd09927, SH2_Tensin_like, Src homology 2 domain found in
Tensin-like proteins. SH2 domain found in Tensin-like
proteins. The Tensins are a family of intracellular
proteins that interact with receptor tyrosine kinases
(RTKs), integrins, and actin. They are thought act as
signaling bridges between the extracellular space and
the cytoskeleton. There are four homologues: Tensin1,
Tensin2 (TENC1, C1-TEN), Tensin3 and Tensin4 (cten), all
of which contain a C-terminal tandem SH2-PTB domain
pairing, as well as actin-binding regions that may
localize them to focal adhesions. The isoforms of
Tensin2 and Tensin3 contain N-terminal C1 domains, which
are atypical and not expected to bind to phorbol esters.
Tensins 1-3 contain a phosphatase (PTPase) and C2 domain
pairing which resembles PTEN (phosphatase and tensin
homologue deleted on chromosome 10) protein. PTEN is a
lipid phosphatase that dephosphorylates
phosphatidylinositol 3,4,5-trisphosphate
(PtdIns(3,4,5)P3) to yield phosphatidylinositol
4,5-bisphosphate (PtdIns(4,5)P2). As PtdIns(3,4,5)P3 is
the product of phosphatidylinositol 3-kinase (PI3K)
activity, PTEN is therefore a key negative regulator of
the PI3K pathway. Because of their PTEN-like domains,
the Tensins may also possess phosphoinositide-binding or
phosphatase capabilities. However, only Tensin2 and
Tensin3 have the potential to be phosphatases since only
their PTPase domains contain a cysteine residue that is
essential for catalytic activity. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 116
Score = 33.9 bits (78), Expect = 0.073
Identities = 17/39 (43%), Positives = 21/39 (53%), Gaps = 3/39 (7%)
Query: 611 KEWYHPTATRSQAEDLLR-RVPSDGAFLVRPSENDNSSY 648
K WY P +R QA LL+ + P G FLVR S +Y
Sbjct: 3 KYWYKPNISRDQAIALLKDKPP--GTFLVRDSTTYKGAY 39
Score = 33.9 bits (78), Expect = 0.073
Identities = 17/39 (43%), Positives = 21/39 (53%), Gaps = 3/39 (7%)
Query: 660 KEWYHPTATRSQAEDLLR-RVPSDGAFLVRPSENDNSSY 697
K WY P +R QA LL+ + P G FLVR S +Y
Sbjct: 3 KYWYKPNISRDQAIALLKDKPP--GTFLVRDSTTYKGAY 39
Score = 28.2 bits (63), Expect = 6.7
Identities = 17/42 (40%), Positives = 23/42 (54%), Gaps = 5/42 (11%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSL 544
W+ +S R +A LL+ GTFLVR+S T+ G Y L
Sbjct: 5 WYKPNIS--RDQAIALLKDKP---PGTFLVRDSTTYKGAYGL 41
>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 = 32.7 bits (74), Expect = 0.075
Identities = 18/48 (37%), Positives = 27/48 (56%), Gaps = 3/48 (6%)
Query: 784 SITVKALYDYQARNDDELSFPKHAIISNV---TRAEGGWWRGDYGGKR 828
++ KALYD A + DELSF K I++ + T+ GWW G++
Sbjct: 2 NVLAKALYDNVAESPDELSFRKGDIMTVLERDTQGLDGWWLCSLHGRQ 49
>gnl|CDD|198247 cd10384, SH2_SOCS3, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 33.6 bits (77), Expect = 0.081
Identities = 22/83 (26%), Positives = 43/83 (51%), Gaps = 9/83 (10%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRVEGRLYTI 721
+Y T + +A LL P+ G FL+R S + + +S + E K+ RI+ EG +++
Sbjct: 12 FYWSTVSGKEANLLLSAEPA-GTFLIRDSSDQRHFFTLSVKTESGTKNLRIQCEGGSFSL 70
Query: 722 GTT--------QFESLVELISYY 736
T +F+ +++L+ +Y
Sbjct: 71 QTDPRSTQPVPRFDCVLKLVHHY 93
>gnl|CDD|212699 cd11765, SH3_Nck_1, First 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 first SH3 domain of Nck
proteins preferentially binds the PxxDY sequence, which
is present in the CD3e cytoplasmic tail. This binding
inhibits phosphorylation by Src kinases, resulting in
the downregulation of TCR surface expression. 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 = 51
Score = 32.0 bits (73), Expect = 0.082
Identities = 18/51 (35%), Positives = 28/51 (54%), Gaps = 1/51 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
V A YDY A+ D ELS K+ ++ + ++ WW+ + + PSNYV
Sbjct: 2 VVAKYDYTAQGDQELSIKKNEKLTLLDDSK-HWWKVQNSSNQTGYVPSNYV 51
>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 = 32.3 bits (73), Expect = 0.083
Identities = 17/53 (32%), Positives = 25/53 (47%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
V ALYDYQ + EL+ + + +E WWR + PS+Y+ E
Sbjct: 3 VIALYDYQTNDPQELALRYNEEYHLLDSSEIHWWRVQDKNGHEGYVPSSYLVE 55
>gnl|CDD|212718 cd11784, SH3_SH3RF2_3, Third Src Homology 3 domain of SH3 domain
containing ring finger 2. SH3RF2 is also called POSHER
(POSH-eliminating RING protein) or HEPP1 (heart protein
phosphatase 1-binding protein). It acts as an
anti-apoptotic regulator of the JNK pathway by binding
to and promoting the degradation of SH3RF1 (or POSH), a
scaffold protein that is required for pro-apoptotic JNK
activation. It may also play a role in cardiac functions
together with protein phosphatase 1. SH3RF2 contains an
N-terminal RING finger domain and three SH3 domains.
This model represents the third SH3 domain, located in
the middle, of SH3RF2. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 32.1 bits (73), Expect = 0.083
Identities = 18/51 (35%), Positives = 26/51 (50%), Gaps = 1/51 (1%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRG-DYGGKRMHWFPSNYVA 838
AL+ Y A +EL K + + + + GW RG R+ FPSNYV+
Sbjct: 4 ALHSYSAHRPEELELQKGEGVRVLGKFQEGWLRGLSLVTGRVGIFPSNYVS 54
>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 = 32.2 bits (73), Expect = 0.084
Identities = 19/54 (35%), Positives = 30/54 (55%), Gaps = 5/54 (9%)
Query: 788 KALYDYQARNDDE----LSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
KALYD++ ++ D+ L+F K I++ + R + W G G K + FP YV
Sbjct: 3 KALYDFEIKDKDQDKDCLTFTKDEILTVIRRVDENWAEGMLGDK-IGIFPILYV 55
>gnl|CDD|198174 cd09918, SH2_Nterm_SPT6_like, N-terminal Src homology 2 (SH2)
domain found in Spt6. N-terminal SH2 domain in Spt6.
Spt6 is an essential transcription elongation factor and
histone chaperone that binds the C-terminal repeat
domain (CTD) of RNA polymerase II. Spt6 contains a
tandem SH2 domain with a novel structure and CTD-binding
mode. The tandem SH2 domain binds to a serine
2-phosphorylated CTD peptide in vitro, whereas its
N-terminal SH2 subdomain does not. CTD binding requires
a positively charged crevice in the C-terminal SH2
subdomain, which lacks the canonical phospho-binding
pocket of SH2 domains. The tandem SH2 domain is
apparently required for transcription elongation in vivo
as its deletion in cells is lethal in the presence of
6-azauracil. In general SH2 domains are involved in
signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 85
Score = 33.0 bits (76), Expect = 0.086
Identities = 18/76 (23%), Positives = 33/76 (43%), Gaps = 10/76 (13%)
Query: 670 SQAEDLLRRVPSDGAFLVRPSENDNSSYVISFR-AEDKIKHCRIRVE--------GRLYT 720
QAE L+ G ++RPS ++++ A+ +H I G+
Sbjct: 11 KQAEAYLKSKDV-GEVVIRPSSKGVDHLTVTWKVADGVYQHIDIEELNKENPFSLGKELI 69
Query: 721 IGTTQFESLVELISYY 736
IG ++E L E+I+ +
Sbjct: 70 IGGEEYEDLDEIIARF 85
>gnl|CDD|198205 cd10342, SH2_SAP1, Src homology 2 (SH2) domain found in
SLAM-associated protein (SAP)1. The X-linked
lymphoproliferative syndrome (XLP) gene encodes SAP
(also called SH2D1A/DSHP) a protein that consists of a 5
residue N-terminus, a single SH2 domain, and a short 25
residue C-terminal tail. XLP is characterized by an
extreme sensitivity to Epstein-Barr virus. Both T and
natural killer (NK) cell dysfunctions have been seen in
XLP patients. SAP binds the cytoplasmic tail of
Signaling lymphocytic activation molecule (SLAM), 2B4,
Ly-9, and CD84. SAP is believed to function as a
signaling inhibitor, by blocking or regulating binding
of other signaling proteins. SAP and the SAP-like
protein EAT-2 recognize the sequence motif TIpYXX[VI],
which is found in the cytoplasmic domains of a
restricted number of T, B, and NK cell surface receptors
and are proposed to be natural inhibitors or regulators
of the physiological role of a small family of receptors
on the surface of these cells. In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 103
Score = 33.5 bits (76), Expect = 0.088
Identities = 19/87 (21%), Positives = 30/87 (34%), Gaps = 11/87 (12%)
Query: 659 DKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSEN---------DNSSYVISFRAEDKIKH 709
YH +R E LL DG++L+R SE+ Y+ ++R +
Sbjct: 2 AVAVYHGKISRETGEKLLLATGLDGSYLLRDSESVPGVYCLCVLYHGYIYTYRVSQT-ET 60
Query: 710 CRIRVEGRLYTIGTTQFESLVELISYY 736
E F + LIS +
Sbjct: 61 GSWSAETAPGVHKRY-FRKIKNLISAF 86
Score = 29.2 bits (65), Expect = 2.8
Identities = 12/34 (35%), Positives = 17/34 (50%)
Query: 610 DKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSEN 643
YH +R E LL DG++L+R SE+
Sbjct: 2 AVAVYHGKISRETGEKLLLATGLDGSYLLRDSES 35
Score = 28.8 bits (64), Expect = 3.4
Identities = 31/106 (29%), Positives = 48/106 (45%), Gaps = 15/106 (14%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
+HG++S R E LL DG++L+R+SE+ G Y L + G + R+
Sbjct: 5 VYHGKIS--RETGEKLLLATGL--DGSYLLRDSESVPGVYCLCVLYHGYIYTYRVSQ--T 58
Query: 563 SGQFYLVE------KSYFDSLYSLISHYRTNHLRSQEFLITLQEPV 602
+ E K YF + +LIS ++ Q +I LQ PV
Sbjct: 59 ETGSWSAETAPGVHKRYFRKIKNLISAFQKP---DQGIVIPLQYPV 101
>gnl|CDD|176511 cd08568, GDPD_TmGDE_like, Glycerophosphodiester phosphodiesterase
domain of Thermotoga maritime and similar proteins.
This subfamily corresponds to the glycerophosphodiester
phosphodiesterase domain (GDPD) present in Thermotoga
maritime glycerophosphodiester phosphodiesterase (TmGDE,
EC 3.1.4.46) and its uncharacterized homologs. Members
in this family show high sequence similarity to
Escherichia coli GP-GDE, which catalyzes the degradation
of glycerophosphodiesters to produce
sn-glycerol-3-phosphate (G3P) and the corresponding
alcohols. TmGDE exists as a monomer that might be the
biologically relevant form.
Length = 226
Score = 35.4 bits (82), Expect = 0.093
Identities = 49/219 (22%), Positives = 86/219 (39%), Gaps = 46/219 (21%)
Query: 293 ESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVYHGHTLTT----KIKFKDV-VKTIRDHA 347
E++ EA+ + + G +ELD W DG +V H L +K K++ K ++
Sbjct: 14 ENTLEAFKKAIEYGADGVELDVWLTKDGKLVVLHDENLKRVGGVDLKVKELTYKELKKLH 73
Query: 348 FETSKYP----VILSIEDNCSLPQQRVMAQIMLDIFKDMLLIHP----VEKN----ETVL 395
P V ++ ++ A I ++I KD+ + P VEK +
Sbjct: 74 PGGELIPTLEEVFRALPND---------AIINVEI-KDIDAVEPVLEIVEKFNALDRVIF 123
Query: 396 PSPHQLRGKILLKHKKLPEGSDEQTPCAIAKDEGKLAEDKIKHCRIRVEGRLY------- 448
S + L + +KL D + I ++E + ++ + +LY
Sbjct: 124 SSFNH---DALRELRKLDP--DAKVGLLIGEEEEGFSIPELHE-----KLKLYSLHVPID 173
Query: 449 TIGTTQFESLVELISYYERHPLYKKIELWYPVSEDLIQR 487
IG FE VEL+ + L KI LW +L+ +
Sbjct: 174 AIGYIGFEKFVELLRLLRK--LGLKIVLWTVNDPELVPK 210
>gnl|CDD|212839 cd11906, SH3_BTK, Src Homology 3 domain of Bruton's tyrosine
kinase. BTK is a cytoplasmic (or nonreceptor) tyr
kinase containing Src homology protein interaction
domains (SH3, SH2) N-terminal to the catalytic tyr
kinase domain. It also contains an N-terminal pleckstrin
homology (PH) domain, which binds the products of PI3K
and allows membrane recruitment and activation, and the
Tec homology (TH) domain with proline-rich and
zinc-binding regions. Btk is expressed in B-cells, and a
variety of myeloid cells including mast cells,
platelets, neutrophils, and dendrictic cells. It
interacts with a variety of partners, from cytosolic
proteins to nuclear transcription factors, suggesting a
diversity of functions. Stimulation of a diverse array
of cell surface receptors, including antigen engagement
of the B-cell receptor (BCR), leads to PH-mediated
membrane translocation of Btk and subsequent
phosphorylation by Src kinase and activation. Btk plays
an important role in the life cycle of B-cells including
their development, differentiation, proliferation,
survival, and apoptosis. Mutations in Btk cause the
primary immunodeficiency disease, X-linked
agammaglobulinaemia (XLA) in humans. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 32.1 bits (73), Expect = 0.094
Identities = 19/54 (35%), Positives = 23/54 (42%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
V ALYDY N +L K + + WWR R + PSNYV E
Sbjct: 2 KVVALYDYTPMNAQDLQLRKGEEYVILEESNLPWWRARDKNGREGYIPSNYVTE 55
>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 = 31.9 bits (73), Expect = 0.10
Identities = 12/34 (35%), Positives = 21/34 (61%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWW 820
+AL D+QA + +LSF K ++ +++ GWW
Sbjct: 2 YEALSDFQAEQEGDLSFKKGEVLRIISKRADGWW 35
>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 = 31.6 bits (72), Expect = 0.11
Identities = 12/41 (29%), Positives = 19/41 (46%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGK 827
V+AL + A + +LSF K I+ + R + W G
Sbjct: 2 VRALCHHVATDSGQLSFRKGDILRVIARVDDDWLLCTRGST 42
>gnl|CDD|176517 cd08575, GDPD_GDE4_like, Glycerophosphodiester phosphodiesterase
domain of mammalian glycerophosphodiester
phosphodiesterase GDE4-like proteins. This subfamily
corresponds to the glycerophosphodiester
phosphodiesterase domain (GDPD) present in mammalian
GDE4 (also known as glycerophosphodiester
phosphodiesterase domain-containing protein 1 (GDPD1))
and similar proteins. Mammalian GDE4 is a transmembrane
protein whose cellular function is not elucidated. It is
expressed widely, including in placenta, liver, kidney,
pancreas, spleen, thymus, ovary, small intestine and
peripheral blood leukocytes. It is also expressed in the
growth cones in neuroblastoma Neuro2a cells, which
suggests mammalian GDE4 may play some distinct role from
other members of mammalian GDEs family. Also included in
this subfamily are uncharacterized mammalian
glycerophosphodiester phosphodiesterase
domain-containing protein 3 (GDPD3) and similar proteins
which display very high sequence homology to mammalian
GDE4.
Length = 264
Score = 35.3 bits (82), Expect = 0.11
Identities = 12/55 (21%), Positives = 20/55 (36%), Gaps = 7/55 (12%)
Query: 297 EAYVRCLRQGCRCIELDCWDGPDGTPIVYHGHTL--TTKIKFKDVVKTIRDHAFE 349
A+ ++ G +ELD DG +V+H L T + D +
Sbjct: 19 AAFRHAVKNGADMLELDVQLTKDGQVVVFHDWDLDRLT-----GGSGLVSDLTYA 68
>gnl|CDD|198246 cd10383, SH2_SOCS2, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 103
Score = 32.9 bits (75), Expect = 0.13
Identities = 28/83 (33%), Positives = 43/83 (51%), Gaps = 9/83 (10%)
Query: 662 WYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRV-EG--RL 718
WY + T ++A++ L+ P +G FLVR S + + IS + + RI +G RL
Sbjct: 9 WYWGSMTVNEAKEKLQDAP-EGTFLVRDSSHSDYLLTISVKTSAGPTNLRIEYQDGKFRL 67
Query: 719 YTI-----GTTQFESLVELISYY 736
+I QF+S+V LI YY
Sbjct: 68 DSIICVKSKLKQFDSVVHLIEYY 90
Score = 28.3 bits (63), Expect = 5.4
Identities = 25/89 (28%), Positives = 42/89 (47%), Gaps = 14/89 (15%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQGRVNHCRIRSKPE 562
W+ G ++ EA++ L+ +GTFLVR+S DY L+ + +R + +
Sbjct: 9 WYWGSMTV--NEAKEKLQDAP---EGTFLVRDSSH--SDYLLTISVKTSAGPTNLRIEYQ 61
Query: 563 SGQFYL-------VEKSYFDSLYSLISHY 584
G+F L + FDS+ LI +Y
Sbjct: 62 DGKFRLDSIICVKSKLKQFDSVVHLIEYY 90
>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 = 31.5 bits (71), Expect = 0.17
Identities = 16/50 (32%), Positives = 24/50 (48%), Gaps = 1/50 (2%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGK-RMHWFPSNYV 837
A Y ++ + ELSF K I + + W+ G G R FP++YV
Sbjct: 5 AQYTFKGDLEVELSFRKGEHICLIRKVNENWYEGRITGTGRQGIFPASYV 54
>gnl|CDD|212778 cd11844, SH3_CAS, Src homology 3 domain of CAS (Crk-Associated
Substrate) scaffolding proteins. CAS proteins function
as molecular scaffolds to regulate protein complexes
that are involved in many cellular processes including
migration, chemotaxis, apoptosis, differentiation, and
progenitor cell function. They mediate the signaling of
integrins at focal adhesions where they localize, and
thus, regulate cell invasion and survival.
Over-expression of these proteins is implicated in poor
prognosis, increased metastasis, and resistance to
chemotherapeutics in many cancers such as breast, lung,
melanoma, and glioblastoma. CAS proteins have also been
linked to the pathogenesis of inflammatory disorders,
Alzheimer's, Parkinson's, and developmental defects.
They share a common domain structure that includes an
N-terminal SH3 domain, an unstructured substrate domain
that contains many YxxP motifs, a serine-rich four-helix
bundle, and a FAT-like C-terminal domain. Vertebrates
contain four CAS proteins: BCAR1 (or p130Cas), NEDD9 (or
HEF1), EFS (or SIN), and CASS4 (or HEPL). The SH3 domain
of CAS proteins binds to diverse partners including FAK,
FRNK, Pyk2, PTP-PEST, DOCK180, among others. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 56
Score = 31.2 bits (71), Expect = 0.18
Identities = 15/37 (40%), Positives = 21/37 (56%), Gaps = 5/37 (13%)
Query: 788 KALYDYQARNDDELSFPKHAIIS----NVTRAEGGWW 820
+ALYD A + DEL+F + I++ N E GWW
Sbjct: 3 RALYDNVAESPDELAFRRGDILTVLEQNTAGLE-GWW 38
>gnl|CDD|212840 cd11907, SH3_TXK, Src Homology 3 domain of TXK, also called Resting
lymphocyte kinase (Rlk). TXK is a cytoplasmic (or
nonreceptor) tyr kinase containing Src homology protein
interaction domains (SH3, SH2) N-terminal to the
catalytic tyr kinase domain. It also contains an
N-terminal cysteine-rich region. Rlk is expressed in
T-cells and mast cell lines, and is a key component of
T-cell receptor (TCR) signaling. It is important in
TCR-stimulated proliferation, IL-2 production and
phospholipase C-gamma1 activation. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 55
Score = 31.5 bits (71), Expect = 0.18
Identities = 20/57 (35%), Positives = 28/57 (49%), Gaps = 4/57 (7%)
Query: 785 ITVKALYDYQARNDDELSFPKHAIISNVTRAEGGWW--RGDYGGKRMHWFPSNYVAE 839
I VKALYD+ R L+ + + + + WW R YG + + PSNYV E
Sbjct: 1 IQVKALYDFLPREPSNLALKRAEEYLILEQYDPHWWKARDRYGNEGL--IPSNYVTE 55
>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 = 31.1 bits (70), Expect = 0.24
Identities = 17/57 (29%), Positives = 30/57 (52%), Gaps = 4/57 (7%)
Query: 786 TVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYVAEIEP 842
T +A+ DY+ + E++ ++ V ++E GWW KR W P++Y +EP
Sbjct: 1 TYRAIADYEKSSKSEMALKTGDVVEVVEKSENGWWFCQLKAKR-GWVPASY---LEP 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 = 30.8 bits (70), Expect = 0.27
Identities = 16/43 (37%), Positives = 26/43 (60%), Gaps = 3/43 (6%)
Query: 788 KALYDYQARNDDE---LSFPKHAIISNVTRAEGGWWRGDYGGK 827
KALYD++ +++DE L+F K +I+ + R + W G G K
Sbjct: 3 KALYDFEMKDEDEKDCLTFKKGDVITVIRRVDENWAEGRLGDK 45
>gnl|CDD|212858 cd11925, SH3_SH3RF3_3, Third Src Homology 3 domain of SH3 domain
containing ring finger 3, an E3 ubiquitin-protein
ligase. SH3RF3 is also called POSH2 (Plenty of SH3s 2)
or SH3MD4 (SH3 multiple domains protein 4). It is a
scaffold protein with E3 ubiquitin-protein ligase
activity. It was identified in the screen for
interacting partners of p21-activated kinase 2 (PAK2).
It may play a role in regulating JNK mediated apoptosis
in certain conditions. It also interacts with GTP-loaded
Rac1. SH3RF3 is highly homologous to SH3RF1; it also
contains an N-terminal RING finger domain and four SH3
domains. This model represents the third SH3 domain,
located in the middle, of SH3RF3. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 57
Score = 30.7 bits (69), Expect = 0.27
Identities = 16/53 (30%), Positives = 27/53 (50%), Gaps = 1/53 (1%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHW-FPSNYVAEI 840
ALY Y+ + +DEL K + + + + GW++G + FP NYV +
Sbjct: 5 ALYAYKPQKNDELELRKGEMYRVIEKCQDGWFKGTSLRTGVSGVFPGNYVTPV 57
>gnl|CDD|212740 cd11806, SH3_PRMT2, Src homology 3 domain of Protein arginine
N-methyltransferase 2. PRMT2, also called HRMT1L1,
belongs to the arginine methyltransferase protein
family. It functions as a coactivator to both estrogen
receptor alpha (ER-alpha) and androgen receptor (AR),
presumably through arginine methylation. The ER-alpha
transcription factor is involved in cell proliferation,
differentiation, morphogenesis, and apoptosis, and is
also implicated in the development and progression of
breast cancer. PRMT2 and its variants are upregulated in
breast cancer cells and may be involved in modulating
the ER-alpha signaling pathway during formation of
breast cancer. PRMT2 also plays a role in regulating the
function of E2F transcription factors, which are
critical cell cycle regulators, by binding to the
retinoblastoma gene product (RB). It contains an
N-terminal SH3 domain and an AdoMet binding domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 30.8 bits (70), Expect = 0.29
Identities = 12/54 (22%), Positives = 24/54 (44%), Gaps = 9/54 (16%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWW----RGDYGGKRMHWFPSNYVA 838
A+ D+ A +D +LSF + + + WW G G + P++++
Sbjct: 4 AIADFVATDDSQLSFESGDKLLVLRKPSVDWWWAEHNGCCG-----YIPASHLH 52
>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 = 30.7 bits (69), Expect = 0.31
Identities = 17/58 (29%), Positives = 31/58 (53%), Gaps = 9/58 (15%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMH-----WFPSNYVAE 839
V+ ++ Y ++ DELS +++ + + + GW G+ R+H WFPS+ V E
Sbjct: 2 VQCVHPYVSQEPDELSLELADVLNILDKTDDGWIFGE----RLHDQERGWFPSSVVEE 55
>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 = 31.0 bits (70), Expect = 0.32
Identities = 16/44 (36%), Positives = 24/44 (54%), Gaps = 3/44 (6%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEG---GWWRGDYGGKR 828
KALYD A + +ELSF + ++ + R G GWW G++
Sbjct: 4 KALYDNAAESPEELSFRRGDVLMVLKREHGSLPGWWLCSLHGQQ 47
>gnl|CDD|212749 cd11815, SH3_Eve1_2, Second 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 = 52
Score = 30.6 bits (69), Expect = 0.33
Identities = 14/48 (29%), Positives = 25/48 (52%), Gaps = 1/48 (2%)
Query: 790 LYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
L+D+ A + D+LS I+ + + + W+RG FP+N+V
Sbjct: 5 LHDFPAEHSDDLSLNSGEIVYLLEKIDTEWYRGKCKN-TTGIFPANHV 51
>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 = 30.3 bits (69), Expect = 0.35
Identities = 11/17 (64%), Positives = 12/17 (70%)
Query: 786 TVKALYDYQARNDDELS 802
T K LYDY A DDE+S
Sbjct: 1 TAKVLYDYTASGDDEVS 17
>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 = 30.4 bits (68), Expect = 0.37
Identities = 16/53 (30%), Positives = 27/53 (50%), Gaps = 4/53 (7%)
Query: 785 ITVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+TV+ Y ++ DE+ F K + + + GWW Y GK W P++Y+
Sbjct: 4 VTVQP---YTSQGKDEIGFEKGVTVEVIQKNLEGWWYIRYLGKE-GWAPASYL 52
>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 = 30.3 bits (68), Expect = 0.38
Identities = 16/51 (31%), Positives = 28/51 (54%), Gaps = 1/51 (1%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAE-GGWWRGDYGGKRMHWFPSNYV 837
+ALYD+++ N E+S +H ++S + + GW G FP++YV
Sbjct: 3 RALYDFRSENPGEISLREHEVLSLCSEQDIEGWLEGVNSRGDRGLFPASYV 53
>gnl|CDD|176499 cd08556, GDPD, Glycerophosphodiester phosphodiesterase domain as
found in prokaryota and eukaryota, and similar proteins.
The typical glycerophosphodiester phosphodiesterase
domain (GDPD) consists of a TIM barrel and a small
insertion domain named the GDPD-insertion (GDPD-I)
domain, which is specific for GDPD proteins. This family
corresponds to both typical GDPD domain and GDPD-like
domain which lacks the GDPD-I region. Members in this
family mainly consist of a large family of prokaryotic
and eukaryotic glycerophosphodiester phosphodiesterases
(GP-GDEs, EC 3.1.4.46), and a number of uncharacterized
homologs. Sphingomyelinases D (SMases D) (sphingomyelin
phosphodiesterase D, EC 3.1.4.41) from spider venom,
SMases D-like proteins, and phospholipase D (PLD) from
several pathogenic bacteria are also included in this
family. GDPD plays an essential role in glycerol
metabolism and catalyzes the hydrolysis of
glycerophosphodiesters to sn-glycerol-3-phosphate (G3P)
and the corresponding alcohols are major sources of
carbon and phosphate. Its catalytic mechanism is based
on the metal ion-dependent acid-base reaction, which is
similar to that of phosphoinositide-specific
phospholipases C (PI-PLCs, EC 3.1.4.11). Both, GDPD
related proteins and PI-PLCs, belong to the superfamily
of PI-PLC-like phosphodiesterases.
Length = 189
Score = 33.0 bits (76), Expect = 0.39
Identities = 13/53 (24%), Positives = 23/53 (43%), Gaps = 7/53 (13%)
Query: 297 EAYVRCLRQGCRCIELDCWDGPDGTPIVYH-GHTLTTKIKFKDVVKTIRDHAF 348
A+ + L G +ELD DG +V H TL ++V++ ++
Sbjct: 17 AAFRKALEAGADGVELDVQLTKDGVLVVIHDIPTL------EEVLELVKGGVG 63
>gnl|CDD|176528 cd08586, PI-PLCc_BcPLC_like, Catalytic domain of Bacillus cereus
phosphatidylinositol-specific phospholipases C and
similar proteins. This subfamily corresponds to the
catalytic domain present in Bacillus cereus
phosphatidylinositol-specific phospholipase C (PI-PLC,
EC 4.6.1.13) and its sequence homologs found in bacteria
and eukaryota. Bacterial PI-PLCs participate in
Ca2+-independent PI metabolism, hydrolyzing the membrane
lipid phosphatidylinositol (PI) to produce
phosphorylated myo-inositol and diacylglycerol (DAG).
Although their precise physiological function remains
unclear, bacterial PI-PLCs may function as virulence
factors in some pathogenic bacteria. Bacterial PI-PLCs
contain a single TIM-barrel type catalytic domain. Their
catalytic mechanism is based on general base and acid
catalysis utilizing two well conserved histidines, and
consists of two steps, a phosphotransfer and a
phosphodiesterase reaction. This family also includes
some uncharacterized eukaryotic homologs, which contains
a single TIM-barrel type catalytic domain, X domain.
They are similar to bacterial PI-PLCs, and distinct from
typical eukaryotic PI-PLCs, which have a multidomain
organization that consists of a PLC catalytic core
domain, and various regulatory domains, and strictly
require Ca2+ for their catalytic activities. The
prototype of this family is Bacillus cereus PI-PLC,
which has a moderate thermal stability and is active as
a monomer.
Length = 279
Score = 33.0 bits (76), Expect = 0.52
Identities = 29/153 (18%), Positives = 57/153 (37%), Gaps = 28/153 (18%)
Query: 269 TKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRC--------LRQGCRCIELDCWDGPDG 320
PLS I +H++ S V+C L G R +++ +
Sbjct: 7 DTPLSELSIPGTHDS-GALHGGLSS-----SVQCQDWSIAEQLNAGIRFLDIRLRLIDNN 60
Query: 321 TPIVYHGHTLTTKIKFKDVVKTI----RDHAFETSKYPVILSI--EDNCSLPQQRVMAQI 374
++HG + F DV+ + ET +I+S+ E + A+I
Sbjct: 61 DLAIHHGPFYQ-GLTFGDVLNECYSFLDANPSET----IIMSLKQEGSGDGNTDSF-AEI 114
Query: 375 MLDIFKDMLLIHPVEKNETVLPSPHQLRGKILL 407
+ + +++ +P+ ++RGKI+L
Sbjct: 115 FKEYLDNYPSYFYYTESK--IPTLGEVRGKIVL 145
>gnl|CDD|212832 cd11899, SH3_Nck2_1, First 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 first SH3 domain of Nck2
binds the PxxDY sequence in the CD3e cytoplasmic tail;
this binding inhibits phosphorylation by Src kinases,
resulting in the downregulation of TCR surface
expression. 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 = 58
Score = 30.1 bits (67), Expect = 0.57
Identities = 18/53 (33%), Positives = 27/53 (50%), Gaps = 1/53 (1%)
Query: 785 ITVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ V A +DY A+ D EL K+ + + ++ WWR R + PSNYV
Sbjct: 4 VIVIAKWDYTAQQDQELDIKKNERLWLLDDSKT-WWRVRNAANRTGYVPSNYV 55
>gnl|CDD|198249 cd10386, SH2_SOCS5, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) family. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 81
Score = 30.8 bits (69), Expect = 0.58
Identities = 18/50 (36%), Positives = 27/50 (54%), Gaps = 1/50 (2%)
Query: 663 YHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRI 712
Y R +AE LL P +G FL+R S ++ + +SFR ++ H RI
Sbjct: 3 YWGVMDRYEAEALLEGKP-EGTFLLRDSAQEDYLFSVSFRRYNRSLHARI 51
>gnl|CDD|212698 cd11764, SH3_Eps8, Src Homology 3 domain of Epidermal growth factor
receptor kinase substrate 8 and similar proteins. This
group is composed of Eps8 and Eps8-like proteins
including Eps8-like 1-3, among others. These proteins
contain N-terminal Phosphotyrosine-binding (PTB),
central SH3, and C-terminal effector domains. Eps8 binds
either Abi1 (also called E3b1) or Rab5 GTPase activating
protein RN-tre through its SH3 domain. With Abi1 and
Sos1, it becomes part of a trimeric complex that is
required to activate Rac. Together with RN-tre, it
inhibits the internalization of EGFR. The SH3 domains of
Eps8 and similar proteins recognize peptides containing
a PxxDY motif, instead of the classical PxxP motif. SH3
domains are protein interaction domains that usually
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 = 54
Score = 29.9 bits (68), Expect = 0.58
Identities = 10/16 (62%), Positives = 12/16 (75%)
Query: 787 VKALYDYQARNDDELS 802
V+ LYD+ ARN ELS
Sbjct: 2 VRVLYDFTARNSKELS 17
>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 = 29.6 bits (67), Expect = 0.62
Identities = 14/51 (27%), Positives = 24/51 (47%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ALYD+++ + LSF + + R+ WW + P+NYV
Sbjct: 2 YRALYDFKSAEPNTLSFSEGETFLLLERSNAHWWLVTNHSGETGYVPANYV 52
>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 = 30.1 bits (67), Expect = 0.65
Identities = 13/53 (24%), Positives = 28/53 (52%), Gaps = 1/53 (1%)
Query: 785 ITVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
++ +A++D+ + EL+F +I + + WW G + WFP+++V
Sbjct: 5 VSAEAVWDHVTMANRELAFKAGDVIKVLDASNKDWWWGQIDDEE-GWFPASFV 56
>gnl|CDD|212917 cd11984, SH3_Shank3, Src homology 3 domain of SH3 and multiple
ankyrin repeat domains protein 3. Shank3, also called
ProSAP2 (Proline-rich synapse-associated protein 2), is
widely expressed. It plays a role in the formation of
dendritic spines and synapses. Haploinsufficiency of the
Shank3 gene causes the 22q13 deletion/Phelan-McDermid
syndrome, and variants of Shank3 have been implicated in
autism spectrum disorder, schizophrenia, and
intellectual disability. 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 = 29.5 bits (66), Expect = 0.75
Identities = 17/53 (32%), Positives = 27/53 (50%), Gaps = 4/53 (7%)
Query: 785 ITVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
I VKA Y + + E+ + + ++ EGG+W G G R WFP++ V
Sbjct: 4 IAVKA---YSPQGEGEIQLNRGERVKVLSIGEGGFWEGTVKG-RTGWFPADCV 52
>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 = 29.3 bits (66), Expect = 0.83
Identities = 15/40 (37%), Positives = 20/40 (50%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKR 828
ALY +QA +EL F I + E GW G+ G+R
Sbjct: 4 ALYRFQALEPNELDFEVGDRIRIIATLEDGWLEGELKGRR 43
>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 = 29.6 bits (67), Expect = 0.84
Identities = 15/57 (26%), Positives = 27/57 (47%), Gaps = 3/57 (5%)
Query: 785 ITVKALYDYQARNDDELSFPKHAI--ISNVTRAEGGWWRGDYGGKRMHWFPSNYVAE 839
A Y++ ++++L F K I I VT+ + W++ R P+NYV +
Sbjct: 2 TECIAKYNFNGASEEDLPFKKGDILTIVAVTK-DPNWYKAKNKDGREGMIPANYVQK 57
>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 = 29.1 bits (65), Expect = 0.88
Identities = 14/45 (31%), Positives = 23/45 (51%), Gaps = 1/45 (2%)
Query: 793 YQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
YQ + + E+ K + ++ EGG+W G G + WFP+ V
Sbjct: 9 YQPQVEGEIPLHKGDRVKVLSIGEGGFWEGSARG-HVGWFPAECV 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 = 29.1 bits (65), Expect = 0.98
Identities = 14/37 (37%), Positives = 22/37 (59%), Gaps = 3/37 (8%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGG---WW 820
V AL+DY+ +DDELSF + ++ + R + WW
Sbjct: 3 VYALWDYEGESDDELSFKEGDCMTILRREDEDETEWW 39
>gnl|CDD|212811 cd11878, SH3_Bem1p_1, First Src Homology 3 domain of Bud emergence
protein 1 and similar domains. Members of this
subfamily bear similarity to Saccharomyces cerevisiae
Bem1p, containing two Src Homology 3 (SH3) domains at
the N-terminus, a central PX domain, and a C-terminal
PB1 domain. Bem1p is a scaffolding protein that is
critical for proper Cdc42p activation during bud
formation in yeast. During budding and mating, Bem1p
migrates to the plasma membrane where it can serve as an
adaptor for Cdc42p and some other proteins. Bem1p also
functions as an effector of the G1 cyclin Cln3p and the
cyclin-dependent kinase Cdc28p in promoting vacuolar
fusion. SH3 domains bind to proline-rich ligands with
moderate affinity and selectivity, preferentially to
PxxP motifs; they play a role in the regulation of
enzymes by intramolecular interactions, changing the
subcellular localization of signal pathway components
and mediate multiprotein complex assemblies.
Length = 54
Score = 29.2 bits (66), Expect = 1.0
Identities = 11/19 (57%), Positives = 15/19 (78%)
Query: 787 VKALYDYQARNDDELSFPK 805
++ALYDY+A+ ELSF K
Sbjct: 2 IRALYDYRAQTPGELSFSK 20
>gnl|CDD|238008 cd00051, EFh, EF-hand, calcium binding motif; A diverse superfamily
of calcium sensors and calcium signal modulators; most
examples in this alignment model have 2 active canonical
EF hands. Ca2+ binding induces a conformational change
in the EF-hand motif, leading to the activation or
inactivation of target proteins. EF-hands tend to occur
in pairs or higher copy numbers.
Length = 63
Score = 29.4 bits (67), Expect = 1.0
Identities = 11/43 (25%), Positives = 23/43 (53%)
Query: 127 TVNLKDIKTFLPRVNCKMSTNKLREHFQEVDTRKTNELAFDEF 169
T++ ++K L + +S ++ E +EVD ++ F+EF
Sbjct: 16 TISADELKAALKSLGEGLSEEEIDEMIREVDKDGDGKIDFEEF 58
>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 = 29.0 bits (65), Expect = 1.0
Identities = 13/51 (25%), Positives = 23/51 (45%), Gaps = 1/51 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ A +DY A+ ++L F + I ++ W G G R+ FP +
Sbjct: 2 MVAQHDYSAQGPEDLEFSQGDTIDILSEVNQEWLEGHCDG-RIGIFPKCFA 51
>gnl|CDD|237796 PRK14712, PRK14712, conjugal transfer nickase/helicase TraI;
Provisional.
Length = 1623
Score = 32.9 bits (74), Expect = 1.1
Identities = 12/33 (36%), Positives = 19/33 (57%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGW 819
V AL+++ D E HA+++NVT+ G W
Sbjct: 7 VMALFNHDTSRDQEPQLHTHAVVANVTQHNGEW 39
>gnl|CDD|217317 pfam03009, GDPD, Glycerophosphoryl diester phosphodiesterase
family. E. coli has two sequence related isozymes of
glycerophosphoryl diester phosphodiesterase (GDPD) -
periplasmic and cytosolic. This family also includes
agrocinopine synthase, the similarity to GDPD has been
noted. This family appears to have weak but not
significant matches to mammalian phospholipase C
pfam00388, which suggests that this family may adopt a
TIM barrel fold.
Length = 238
Score = 32.0 bits (73), Expect = 1.1
Identities = 18/59 (30%), Positives = 25/59 (42%), Gaps = 7/59 (11%)
Query: 293 ESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVYHGHTL--TTKIKFKDVVKTIRDHAFE 349
E++ A+ + G IE D DG P+V H TL TT D ++D E
Sbjct: 10 ENTLLAFRKAAEAGADYIEFDVQLTKDGVPVVMHDFTLDRTT-----DGAGRVKDLTLE 63
>gnl|CDD|198177 cd09921, SH2_Jak_family, Src homology 2 (SH2) domain in the Janus
kinase (Jak) family. The Janus kinases (Jak) are a
family of 4 non-receptor tyrosine kinases (Jak1, Jak2,
Jak3, Tyk2) which respond to cytokine or growth factor
receptor activation. To transduce cytokine signaling, a
series of conformational changes occur in the
receptor-Jak complex upon extracellular ligand binding.
This results in trans-activation of the
receptor-associated Jaks followed by phosphorylation of
receptor tail tyrosine sites. The Signal Transducers and
Activators of Transcription (STAT) are then recruited to
the receptor tail, become phosphorylated and translocate
to the nucleus to regulate transcription. Jaks have four
domains: the pseudokinase domain, the catalytic tyrosine
kinase domain, the FERM (band four-point-one, ezrin,
radixin, and moesin) domain, and the SH2 (Src
Homology-2) domain. The Jak kinases are regulated by
several enzymatic and non-enzymatic mechanisms. First,
the Jak kinase domain is regulated by phosphorylation of
the activation loop which is associated with the
catalytically competent kinase conformation and is
distinct from the inactive kinase conformation. Second,
the pseudokinase domain directly modulates Jak catalytic
activity with the FERM domain maintaining an active
state. Third, the suppressor of cytokine signaling
(SOCS) family and tyrosine phosphatases directly
regulate Jak activity. Dysregulation of Jak activity can
manifest as either a reduction or an increase in kinase
activity resulting in immunodeficiency, inflammatory
diseases, hematological defects, autoimmune and
myeloproliferative disorders, and susceptibility to
infection. Altered Jak regulation occurs by many
mechanisms, including: gene translocations, somatic or
inherited point mutations, receptor mutations, and
alterations in the activity of Jak regulators such as
SOCS or phosphatases. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 97
Score = 29.9 bits (68), Expect = 1.2
Identities = 14/61 (22%), Positives = 33/61 (54%), Gaps = 7/61 (11%)
Query: 683 GAFLVRPSENDNSSYVISFRAED----KIKHCRI-RVEGRLYTIG--TTQFESLVELISY 735
G++++R SE + +Y I +D + K +I + EG ++ + + ++ SL +L++
Sbjct: 36 GSYILRESETEYDTYYIDVCVKDGSRFQTKTFKIEKKEGGVFFLDGDSREYPSLRDLLNS 95
Query: 736 Y 736
Sbjct: 96 L 96
>gnl|CDD|198175 cd09919, SH2_STAT_family, Src homology 2 (SH2) domain found in
signal transducer and activator of transcription (STAT)
family. STAT proteins mediate the signaling of
cytokines and a number of growth factors from the
receptors of these extracellular signaling molecules to
the cell nucleus. STATs are specifically phosphorylated
by receptor-associated Janus kinases, receptor tyrosine
kinases, or cytoplasmic tyrosine kinases. The
phosphorylated STAT molecules dimerize by reciprocal
binding of their SH2 domains to the phosphotyrosine
residues. These dimeric STATs translocate into the
nucleus, bind to specific DNA sequences, and regulate
the transcription of their target genes. However there
are a number of unphosphorylated STATs that travel
between the cytoplasm and nucleus and some STATs that
exist as dimers in unstimulated cells that can exert
biological functions independent of being activated by a
receptor. There are seven mammalian STAT family members
which have been identified: STAT1, STAT2, STAT3, STAT4,
STAT5 (STAT5A and STAT5B), and STAT6. There are 6
conserved domains in STAT: N-terminal domain (NTD),
coiled-coil domain (CCD), DNA-binding domain (DBD),
alpha-helical linker domain (LD), SH2 domain, and
transactivation domain (TAD). NTD is involved in
dimerization of unphosphorylated STATs monomers and for
the tetramerization between STAT1, STAT3, STAT4 and
STAT5 on promoters with two or more tandem STAT binding
sites. It also plays a role in promoting interactions
with transcriptional co-activators such as CREB binding
protein (CBP)/p300, as well as being important for
nuclear import and deactivation of STATs involving
tyrosine de-phosphorylation. The CCD interacts with
other proteins, such as IFN regulatory protein 9
(IRF-9/p48) with STAT1 and c-JUN with STAT3 and is also
thought to participate in the negative regulation of
these proteins. Distinct genes are bound to STATs via
their DBD domain. This domain is also involved in
nuclear translocation of activated STAT1 and STAT3
phosphorylated dimers upon cytokine stimulation. LD
links the DNA-binding and SH2 domains and is important
for the transcriptional activation of STAT1 in response
to IFN-gamma. It also plays a role in protein-protein
interactions and has also been implicated in the
constitutive nucleocytoplasmic shuttling of
unphosphorylated STATs in resting cells. The SH2 domain
is necessary for receptor association and tyrosine
phosphodimer formation. Residues within this domain may
be particularly important for some cellular functions
mediated by the STATs as well as residues adjacent to
this domain. The TAD interacts with several proteins,
namely minichromosome maintenance complex component 5
(MCM5), breast cancer 1 (BRCA1) and CBP/p300. TAD also
contains a modulatory phosphorylation site that
regulates STAT activity and is necessary for maximal
transcription of a number of target genes. The conserved
tyrosine residue present in the C-terminus is crucial
for dimerization via interaction with the SH2 domain
upon the interaction of the ligand with the receptor.
STAT activation by tyrosine phosphorylation also
determines nuclear import and retention, DNA binding to
specific DNA elements in the promoters of responsive
genes, and transcriptional activation of STAT dimers. In
addition to the SH2 domain there is a coiled-coil
domain, a DNA binding domain, and a transactivation
domain in the STAT proteins. In general SH2 domains are
involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 115
Score = 30.6 bits (70), Expect = 1.2
Identities = 20/66 (30%), Positives = 31/66 (46%), Gaps = 15/66 (22%)
Query: 477 WYPVSEDLIQRMGLGVPNDELHFGEKWFHGRLSG--GRAEAEDLLRRYSHLGDGTFLVRE 534
W+ L +R H + W G + G + EAEDLL++ GTFL+R
Sbjct: 1 WFFAIMLLTKR----------HLLKLWQDGLIMGFISKEEAEDLLKKKPP---GTFLLRF 47
Query: 535 SETFIG 540
S++ +G
Sbjct: 48 SDSELG 53
>gnl|CDD|212833 cd11900, SH3_Nck1_1, First 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 first SH3
domain of Nck1 binds the PxxDY sequence in the CD3e
cytoplasmic tail; this binding inhibits phosphorylation
by Src kinases, resulting in the downregulation of TCR
surface expression. 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 = 59
Score = 28.9 bits (64), Expect = 1.3
Identities = 17/53 (32%), Positives = 27/53 (50%), Gaps = 1/53 (1%)
Query: 785 ITVKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ V A +DY A+ D EL K+ + + ++ WWR + + PSNYV
Sbjct: 3 VVVVAKFDYVAQQDQELDIKKNERLWLLDDSKS-WWRVRNAMNKTGFVPSNYV 54
>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 = 28.6 bits (64), Expect = 1.5
Identities = 17/54 (31%), Positives = 26/54 (48%), Gaps = 4/54 (7%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGD--YGGKRMHWFPSNYVA 838
V ALY Y+ +D +L F K + + G WW+ G+ + P N+VA
Sbjct: 2 VVALYSYEPSHDGDLGFEKGEKL-RILEQSGEWWKAQSLTTGQE-GFIPFNFVA 53
>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 = 28.4 bits (63), Expect = 1.7
Identities = 15/50 (30%), Positives = 25/50 (50%), Gaps = 1/50 (2%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
KAL +Y+ N +L F K +I + + W+ G+ G FP++ V
Sbjct: 4 KALCNYRGHNPGDLKFNKGDVILLRRQLDENWYLGEINGVS-GIFPASSV 52
>gnl|CDD|198245 cd10382, SH2_SOCS1, Src homology 2 (SH2) domain found in
suppressor of cytokine signaling (SOCS) proteins. SH2
domain found in SOCS proteins. SOCS was first recognized
as a group of cytokine-inducible SH2 (CIS) domain
proteins comprising eight family members in human (CIS
and SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 98
Score = 29.6 bits (67), Expect = 2.0
Identities = 19/69 (27%), Positives = 32/69 (46%), Gaps = 3/69 (4%)
Query: 670 SQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHCRIRV-EGRLYTIGTTQ-FE 727
+A L+R P G FL+R S N + +S + RI G+ G+ + F+
Sbjct: 20 EEAHAKLKREPV-GTFLIRDSRQKNCFFALSVKMASGPVSIRILFKAGKFSLDGSKESFD 78
Query: 728 SLVELISYY 736
L +L+ +Y
Sbjct: 79 CLFKLLEHY 87
Score = 28.9 bits (65), Expect = 3.1
Identities = 26/73 (35%), Positives = 37/73 (50%), Gaps = 8/73 (10%)
Query: 514 EAEDLLRRYSHLGDGTFLVRESETFIGDYSLSFWWQ-GRVNHCRIRSKPESGQFYLVE-K 571
EA L+R GTFL+R+S ++LS G V+ IR ++G+F L K
Sbjct: 21 EAHAKLKREP---VGTFLIRDSRQKNCFFALSVKMASGPVS---IRILFKAGKFSLDGSK 74
Query: 572 SYFDSLYSLISHY 584
FD L+ L+ HY
Sbjct: 75 ESFDCLFKLLEHY 87
>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 = 28.4 bits (63), Expect = 2.1
Identities = 16/50 (32%), Positives = 28/50 (56%), Gaps = 1/50 (2%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ +D+QA++ EL+ K I+ + W G++ G R+ FP+NYV
Sbjct: 4 RLKFDFQAQSPKELTLQKGDIVYIHKEVDKNWLEGEHHG-RVGIFPANYV 52
>gnl|CDD|212794 cd11860, SH3_DLG5, Src homology 3 domain of Disks Large homolog 5.
DLG5 is a multifunctional scaffold protein that is
located at sites of cell-cell contact and is involved in
the maintenance of cell shape and polarity. Mutations in
the DLG5 gene are associated with Crohn's disease (CD)
and inflammatory bowel disease (IBD). DLG5 is a member
of the MAGUK (membrane-associated guanylate kinase)
protein family, which is characterized by the presence
of a core of three domains: PDZ, SH3, and guanylate
kinase (GuK). The GuK domain in MAGUK proteins is
enzymatically inactive; instead, the domain mediates
protein-protein interactions and associates
intramolecularly with the SH3 domain. DLG5 contains 4
PDZ domains as well as an N-terminal domain of unknown
function. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 63
Score = 28.5 bits (64), Expect = 2.2
Identities = 13/23 (56%), Positives = 17/23 (73%)
Query: 787 VKALYDYQARNDDELSFPKHAII 809
V+AL+D A N+DELSF K I+
Sbjct: 2 VRALFDRSAENEDELSFKKDDIL 24
>gnl|CDD|133136 cd00303, retropepsin_like, Retropepsins; pepsin-like aspartate
proteases. The family includes pepsin-like aspartate
proteases from retroviruses, retrotransposons and
retroelements, as well as eukaryotic
dna-damage-inducible proteins (DDIs), and bacterial
aspartate peptidases. While fungal and mammalian pepsins
are bilobal proteins with structurally related N and
C-terminals, retropepsins are half as long as their
fungal and mammalian counterparts. The monomers are
structurally related to one lobe of the pepsin molecule
and retropepsins function as homodimers. The active site
aspartate occurs within a motif (Asp-Thr/Ser-Gly), as it
does in pepsin. Retroviral aspartyl protease is
synthesized as part of the POL polyprotein that contains
an aspartyl protease, a reverse transcriptase, RNase H,
and an integrase. The POL polyprotein undergoes specific
enzymatic cleavage to yield the mature proteins. In
aspartate peptidases, Asp residues are ligands of an
activated water molecule in all examples where catalytic
residues have been identified. This group of aspartate
peptidases is classified by MEROPS as the peptidase
family A2 (retropepsin family, clan AA), subfamily A2A.
Length = 92
Score = 29.2 bits (66), Expect = 2.2
Identities = 10/41 (24%), Positives = 16/41 (39%)
Query: 317 GPDGTPIVYHGHTLTTKIKFKDVVKTIRDHAFETSKYPVIL 357
G +G+ + G L I T+ + + Y VIL
Sbjct: 46 GANGSSVKTLGVILPVTIGIGGKTFTVDFYVLDLLSYDVIL 86
>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 = 28.3 bits (64), Expect = 2.2
Identities = 14/41 (34%), Positives = 19/41 (46%), Gaps = 7/41 (17%)
Query: 787 VKALYDYQARNDDE-------LSFPKHAIISNVTRAEGGWW 820
V+AL+DY D LSF K I+ V + + WW
Sbjct: 2 VRALFDYDPEEDPLIPCKEAGLSFKKGDILQIVNQDDPNWW 42
>gnl|CDD|241517 cd13363, PH_PLC_delta, Phospholipase C-delta (PLC-delta) pleckstrin
homology (PH) domain. The PLC-delta (PLCdelta) consists
of three family members, delta 1, 2, and 3. PLC-delta1
is the most well studied. PLC-delta is activated by high
calcium levels generated by other PLC family members,
and functions as a calcium amplifier within the cell.
PLC-delta consists of an N-terminal PH domain, a EF hand
domain, a catalytic domain split into X and Y halves,
and a C-terminal C2 domain. The PH domain binds PIP2 and
promotes activation of the catalytic core as well as
tethering the enzyme to the plasma membrane. The C2
domain has been shown to mediate calcium-dependent
phospholipid binding as well. The PH and C2 domains
operate in concert as a "tether and fix" apparatus
necessary for processive catalysis by the enzyme. Its
leucine-rich nuclear export signal (NES) in its EF hand
motif, as well as a Nuclear localization signal within
its linker region allow PLC-delta 1 to actively
translocate into and out of the nucleus. PLCs (EC
3.1.4.3) play a role in the initiation of cellular
activation, proliferation, differentiation and
apoptosis. They are central to inositol lipid signalling
pathways, facilitating intracellular Ca2+ release and
protein kinase C (PKC) activation. Specificaly, PLCs
catalyze the cleavage of
phosphatidylinositol-4,5-bisphosphate (PIP2) and result
in the release of 1,2-diacylglycerol (DAG) and inositol
1,4,5-triphosphate (IP3). These products trigger the
activation of protein kinase C (PKC) and the release of
Ca2+ from intracellular stores. There are fourteen kinds
of mammalian phospholipase C proteins which are are
classified into six isotypes (beta, gamma, delta,
epsilon, zeta, eta). PH domains have diverse functions,
but in general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 117
Score = 29.6 bits (67), Expect = 2.3
Identities = 19/44 (43%), Positives = 23/44 (52%), Gaps = 5/44 (11%)
Query: 62 RCF-IVLYGSEFKLKTLSIAAFSEKECGLWVTGLRYLVPDTLRA 104
RCF IV G + K L + A SE+E WV GLR L+ L
Sbjct: 73 RCFTIVFKG---RRKNLDLIASSEEEAQHWVRGLRKLI-ARLTN 112
>gnl|CDD|223657 COG0584, UgpQ, Glycerophosphoryl diester phosphodiesterase [Energy
production and conversion].
Length = 257
Score = 31.0 bits (70), Expect = 2.4
Identities = 14/38 (36%), Positives = 18/38 (47%)
Query: 293 ESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVYHGHTL 330
E++ A+ QG IELD DG +V H TL
Sbjct: 20 ENTLAAFELAAEQGADYIELDVQLTKDGVLVVIHDETL 57
>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 = 28.0 bits (62), Expect = 2.4
Identities = 14/50 (28%), Positives = 28/50 (56%), Gaps = 1/50 (2%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+A +D++A+ EL K I+ + + W+ G++ G R+ FP +Y+
Sbjct: 4 RAKFDFKAQTLKELPLQKGDIVYIYKQIDQNWYEGEHHG-RVGIFPRSYI 52
>gnl|CDD|176553 cd08612, GDPD_GDE4, Glycerophosphodiester phosphodiesterase domain
of mammalian glycerophosphodiester phosphodiesterase
GDE4 and similar proteins. This subfamily corresponds
to the glycerophosphodiester phosphodiesterase domain
(GDPD) present in mammalian GDE4 (also known as
glycerophosphodiester phosphodiesterase
domain-containing protein 1 (GDPD1)) and similar
proteins. Mammalian GDE4 is a transmembrane protein
whose cellular function has not yet been elucidated. It
is expressed widely, including in placenta, liver,
kidney, pancreas, spleen, thymus, ovary, small intestine
and peripheral blood leukocytes. It is also expressed in
the growth cones in neuroblastoma Neuro2a cells, which
suggests GDE4 may play some distinct role from other
members of the GDE family.
Length = 300
Score = 31.0 bits (71), Expect = 2.5
Identities = 12/38 (31%), Positives = 19/38 (50%)
Query: 293 ESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVYHGHTL 330
E++ EA+ ++ G +ELD DG +V H L
Sbjct: 41 ENTMEAFEHAVKVGTDMLELDVHLTKDGQVVVSHDENL 78
>gnl|CDD|212880 cd11947, SH3_GRAP2_N, N-terminal Src homology 3 domain of
GRB2-related adaptor protein 2. GRAP2 is also called
GADS (GRB2-related adapter downstream of Shc), GrpL,
GRB2L, Mona, or GRID (Grb2-related protein with insert
domain). It is expressed specifically in the
hematopoietic system. It plays an important role in T
cell receptor (TCR) signaling by promoting the formation
of the SLP-76:LAT complex, which couples the TCR to the
Ras pathway. It also have roles in antigen-receptor and
tyrosine kinase mediated signaling. GRAP2 is unique from
other GRB2-like adaptor proteins in that it can be
regulated by caspase cleavage. It contains an N-terminal
SH3 domain, a central SH2 domain, and a C-terminal SH3
domain. The N-terminal SH3 domain of the related protein
GRB2 binds to Sos and Sos-derived proline-rich peptides.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 52
Score = 27.8 bits (62), Expect = 2.7
Identities = 13/50 (26%), Positives = 28/50 (56%), Gaps = 2/50 (4%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ +D+ A +DELSF K ++ + ++ W++ + G+ + P N+V
Sbjct: 3 RGKFDFTASGEDELSFKKGDVL-KILSSDDIWFKAELNGEE-GYVPKNFV 50
>gnl|CDD|212803 cd11870, SH3_p67phox-like_C, C-terminal Src Homology 3 domain of
the p67phox subunit of NADPH oxidase and similar
proteins. This subfamily is composed of p67phox, NADPH
oxidase activator 1 (Noxa1), and similar proteins.
p67phox, also called Neutrophil cytosol factor 2
(NCF-2), and Noxa1 are homologs and are the cytosolic
subunits of the phagocytic (Nox2) and nonphagocytic
(Nox1) NADPH oxidase complexes, respectively. NADPH
oxidase catalyzes the transfer of electrons from NADPH
to oxygen during phagocytosis forming superoxide and
reactive oxygen species. p67phox and Noxa1 play
regulatory roles. p67phox contains N-terminal TPR, first
SH3 (or N-terminal or central SH3), PB1, and C-terminal
SH3 domains. Noxa1 has a similar domain architecture
except it is lacking the N-terminal SH3 domain. The TPR
domain of both binds activated GTP-bound Rac, while the
C-terminal SH3 domain of p67phox and Noxa1 binds the
polyproline motif found at the C-terminus of p47phox and
Noxo1, respectively. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 27.9 bits (62), Expect = 2.9
Identities = 15/51 (29%), Positives = 25/51 (49%), Gaps = 1/51 (1%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
V AL+ Y+A+ ++L F + I ++ W G G R+ FP +V
Sbjct: 2 VVALHRYEAQGPEDLGFREGDTIDVLSEVNEAWLEGHSDG-RVGIFPKCFV 51
>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 = 28.0 bits (62), Expect = 2.9
Identities = 15/53 (28%), Positives = 27/53 (50%), Gaps = 5/53 (9%)
Query: 788 KALYDYQARNDDELSFPKH---AIISNVTRAEGGWWRGDYGGKRMHWFPSNYV 837
+ALY +Q+ N +E++ ++ I S + GW +G FP++YV
Sbjct: 3 RALYSFQSENKEEINIQENEELVIFSENSL--DGWLQGQNSRGETGLFPASYV 53
>gnl|CDD|198267 cd10404, SH2_STAP2, Src homology 2 domain found in
Signal-transducing adaptor protein 2 (STAP2). STAP2 is
a signal-transducing adaptor protein. It is composed of
a Pleckstrin homology (PH) and SH2 domains along with
several tyrosine phosphorylation sites. The STAP2
protein is the substrate of breast tumor kinase, an
Src-type non-receptor tyrosine kinase that mediates the
interactions linking proteins involved in signal
transduction pathways. STAP2 has alternative splicing
variants. STAP2 has been shown to interact with
tyrosine-protein kinase 6 (PTK6). In general SH2 domains
are involved in signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 97
Score = 29.1 bits (65), Expect = 2.9
Identities = 19/79 (24%), Positives = 36/79 (45%), Gaps = 7/79 (8%)
Query: 668 TRSQAEDLLRRVPSDGAFLVRPSENDNSSYVIS----FRAEDKIKHCRIRVEGRLYTIGT 723
+R +A+ LL R P G L+RP + ++ ++H +++ EG Y I
Sbjct: 8 SRLEAQLLLERYPECGNLLLRPGGDGADGVSVTTRQMLNGTPVVRHYKVKREGPKYVIDV 67
Query: 724 TQ---FESLVELISYYERH 739
+ SL +++Y+ H
Sbjct: 68 EEPFSCTSLDAVVNYFVSH 86
>gnl|CDD|190632 pfam03431, RNA_replicase_B, RNA replicase, beta-chain. This family
is of Leviviridae RNA replicases. The replicase is also
known as RNA dependent RNA polymerase.
Length = 540
Score = 31.0 bits (70), Expect = 2.9
Identities = 41/165 (24%), Positives = 55/165 (33%), Gaps = 34/165 (20%)
Query: 370 VMAQIMLDIFKDMLLIHPVEKNETVLPSPHQ---------LRGKILLKHKKLPEGSDEQT 420
V Q+ L I D+LL + + L S LR +IL KH G D
Sbjct: 3 VEDQLALSIANDLLLAYGTQLFSRELGSSDPSPDDFRIEYLRAEILSKHDSFSLGIDTAD 62
Query: 421 PCAIAKDEGKLAEDKIKHCRIRVE-GRLYTIGTTQFESLVELISYYERHPLYKKIELWYP 479
A A ++ AE + CR + G Y SL E + R + I
Sbjct: 63 REAAAWEKFLAAEAR---CRQTNQRGYRYDYNEDFNLSLGESCIHMAR----RLIAKL-- 113
Query: 480 VSEDLIQRMGLGVPNDELHFGEKWFHGRLSGGRAEAEDLLRRYSH 524
LG D + F H R SGG + + R H
Sbjct: 114 ----------LG---DSVSFEPMLRHCRFSGGASTGNN--RSDGH 143
>gnl|CDD|212836 cd11903, SH3_Nck2_3, Third 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 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 = 59
Score = 28.1 bits (62), Expect = 2.9
Identities = 14/53 (26%), Positives = 26/53 (49%), Gaps = 2/53 (3%)
Query: 787 VKALYDYQARNDDELSFPKHAIISNVTRAEGG--WWRGDYGGKRMHWFPSNYV 837
V+ LY + + ++EL+F K + + + E WW+ ++ P NYV
Sbjct: 3 VQTLYPFSSVTEEELNFEKGETMEVIEKPENDPEWWKCKNSRGQVGLVPKNYV 55
>gnl|CDD|198285 cd10718, SH2_CIS, Src homology 2 (SH2) domain found in
cytokine-inducible SH2-containing protein (CIS). CIS
family members are known to be cytokine-inducible
negative regulators of cytokine signaling. The
expression of the CIS gene can be induced by IL2, IL3,
GM-CSF and EPO in hematopoietic cells.
Proteasome-mediated degradation of this protein has been
shown to be involved in the inactivation of the
erythropoietin receptor. Suppressor of cytokine
signalling (SOCS) was first recognized as a group of
cytokine-inducible SH2 (CIS) domain proteins comprising
eight family members in human (CIS and SOCS1-SOCS7). In
addition to the SH2 domain, SOCS proteins have a
variable N-terminal domain and a conserved SOCS box in
the C-terminal domain. SOCS proteins bind to a substrate
via their SH2 domain. The prototypical members, CIS and
SOCS1-SOCS3, have been shown to regulate growth hormone
signaling in vitro and in a classic negative feedback
response compete for binding at phosphotyrosine sites in
JAK kinase and receptor pathways to displace effector
proteins and target bound receptors for proteasomal
degradation. Loss of SOCS activity results in excessive
cytokine signaling associated with a variety of
hematopoietic, autoimmune, and inflammatory diseases and
certain cancers. In general SH2 domains are involved in
signal transduction. They typically bind
pTyr-containing ligands via two surface pockets, a pTyr
and hydrophobic binding pocket, allowing proteins with
SH2 domains to localize to tyrosine phosphorylated
sites.
Length = 88
Score = 28.6 bits (64), Expect = 3.1
Identities = 26/90 (28%), Positives = 39/90 (43%), Gaps = 16/90 (17%)
Query: 503 WFHGRLSGGRAEAEDLLRRYSHLGDGTFLVRESETFIGDYSLSF-WWQGRVNHCRIRSKP 561
W+ G ++ EA L++ +GTFLVR+S +LS +G N +R +
Sbjct: 6 WYWGSITAS--EAHQALQKAP---EGTFLVRDSSHPSYMLTLSVKTTRGPTN---VRIEY 57
Query: 562 ESGQFYLVEKS-------YFDSLYSLISHY 584
G F L S F + SL+ HY
Sbjct: 58 SDGSFRLDSSSLARPRLLSFPDVVSLVQHY 87
>gnl|CDD|234933 PRK01285, PRK01285, pyruvoyl-dependent arginine decarboxylase;
Reviewed.
Length = 155
Score = 29.8 bits (68), Expect = 3.2
Identities = 13/36 (36%), Positives = 18/36 (50%), Gaps = 7/36 (19%)
Query: 489 GLGVPNDELHFG---EKWFHGRLSGGRAEAEDLLRR 521
G+ +P D+ +G E HG G + EAEDL
Sbjct: 84 GVAIPKDKELYGYISE--HHGF--GEKEEAEDLAAT 115
>gnl|CDD|198248 cd10385, SH2_SOCS4, Src homology 2 (SH2) domain found in suppressor
of cytokine signaling (SOCS) proteins. SH2 domain found
in SOCS proteins. SOCS was first recognized as a group
of cytokine-inducible SH2 (CIS) domain proteins
comprising eight family members in human (CIS and
SOCS1-SOCS7). In addition to the SH2 domain, SOCS
proteins have a variable N-terminal domain and a
conserved SOCS box in the C-terminal domain. SOCS
proteins bind to a substrate via their SH2 domain. The
prototypical members, CIS and SOCS1-SOCS3, have been
shown to regulate growth hormone signaling in vitro and
in a classic negative feedback response compete for
binding at phosphotyrosine sites in JAK kinase and
receptor pathways to displace effector proteins and
target bound receptors for proteasomal degradation. Loss
of SOCS activity results in excessive cytokine signaling
associated with a variety of hematopoietic, autoimmune,
and inflammatory diseases and certain cancers. Members
(SOCS4-SOCS7) were identified by their conserved SOCS
box, an adapter motif of 3 helices that associates
substrate binding domains, such as the SOCS SH2 domain,
ankryin, and WD40 with ubiquitin ligase components.
These show limited cytokine induction. In general SH2
domains are involved in signal transduction. They
typically bind pTyr-containing ligands via two surface
pockets, a pTyr and hydrophobic binding pocket, allowing
proteins with SH2 domains to localize to tyrosine
phosphorylated sites.
Length = 101
Score = 28.9 bits (64), Expect = 3.4
Identities = 20/62 (32%), Positives = 29/62 (46%), Gaps = 1/62 (1%)
Query: 651 VPQPNQHEDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYVISFRAEDKIKHC 710
VP Q + Y + AE LL P +G FL+R S ++ + +SFR + H
Sbjct: 1 VPDLLQINNNPCYWGVMDKYAAEALLEGKP-EGTFLLRDSAQEDYLFSVSFRRYSRSLHA 59
Query: 711 RI 712
RI
Sbjct: 60 RI 61
>gnl|CDD|176529 cd08587, PI-PLCXDc_like, Catalytic domain of
phosphatidylinositol-specific phospholipase C X domain
containing and similar proteins. This family
corresponds to the catalytic domain present in
phosphatidylinositol-specific phospholipase C X domain
containing proteins (PI-PLCXD) which are bacterial
phosphatidylinositol-specific phospholipase C (PI-PLC,
EC 4.6.1.13) sequence homologs mainly found in
eukaryota. The typical eukaryotic
phosphoinositide-specific phospholipase C (PI-PLC, EC
3.1.4.11) have a multidomain organization that consists
of a PLC catalytic core domain, and various regulatory
domains. The catalytic core domain is assembled from two
highly conserved X- and Y-regions split by a divergent
linker sequence. In contrast, eukaryotic PI-PLCXDs and
their bacterial homologs contain a single TIM-barrel
type catalytic domain, X domain, which is more closely
related to that of bacterial PI-PLCs. Although the
biological function of eukaryotic PI-PLCXDs still
remains unclear, it may be distinct from that of typical
eukaryotic PI-PLCs.
Length = 288
Score = 30.4 bits (69), Expect = 3.4
Identities = 31/150 (20%), Positives = 46/150 (30%), Gaps = 29/150 (19%)
Query: 261 YDAIHQDMTKPLSHYFINSSHN--TYLTGDQ---FSSESSCEAYVRC------------- 302
AI PL I SH+ Y + +
Sbjct: 1 PSAIGD---LPLRDLVIPGSHDSGMYTINGDSPVGPDQPEFGKIAKGIVRKWSVTQSLSI 57
Query: 303 ---LRQGCRCIELDCWDGPDGTPIVYHGHTLTTKIKFKDVVKTIRDHAFETSKYPVILSI 359
L G R +L PD +Y H L + +V++ + D E K VIL
Sbjct: 58 YDQLEAGIRYFDLRVAYKPDSENKLYFVHGLYSGEPVDEVLEDVNDFLDEHPKEVVILDF 117
Query: 360 E-----DNCSLPQQRVMAQIMLDIFKDMLL 384
D+ S + +++ DIF D L
Sbjct: 118 NHFYGMDDKSPEDHEKLVELLEDIFGDKLC 147
>gnl|CDD|212725 cd11791, SH3_UBASH3, Src homology 3 domain of Ubiquitin-associated
and SH3 domain-containing proteins, also called TULA (T
cell Ubiquitin LigAnd) family of proteins. UBASH3 or
TULA proteins are also referred to as Suppressor of T
cell receptor Signaling (STS) proteins. They contain an
N-terminal UBA domain, a central SH3 domain, and a
C-terminal histidine phosphatase domain. They bind c-Cbl
through the SH3 domain and to ubiquitin via UBA. In some
vertebrates, there are two TULA family proteins, called
UBASH3A (also called TULA or STS-2) and UBASH3B (also
called TULA-2 or STS-1), which show partly overlapping
as well as distinct functions. UBASH3B is widely
expressed while UBASH3A is only found in lymphoid cells.
UBASH3A facilitates apoptosis induced in T cells through
its interaction with the apoptosis-inducing factor AIF.
UBASH3B is an active phosphatase while UBASH3A is not.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 27.7 bits (62), Expect = 3.8
Identities = 14/63 (22%), Positives = 20/63 (31%), Gaps = 17/63 (26%)
Query: 786 TVKALYDYQARNDDELSFPKHAII----SNVTRAEGGWWRGDYGGKRMHW-------FPS 834
++ LY Y + +DEL I + + GW G W P
Sbjct: 1 VLRVLYPYTPQEEDELELVPGDYIYVSPEELDSSSDGWVEG------TSWLTGCSGLLPE 54
Query: 835 NYV 837
NY
Sbjct: 55 NYT 57
>gnl|CDD|218332 pfam04929, Herpes_DNAp_acc, Herpes DNA replication accessory
factor. Replicative DNA polymerases are capable of
polymerising tens of thousands of nucleotides without
dissociating from their DNA templates. The high
processivity of these polymerases is dependent upon
accessory proteins that bind to the catalytic subunit of
the polymerase or to the substrate. The Epstein-Barr
virus (EBV) BMRF1 protein is an essential component of
the viral DNA polymerase and is absolutely required for
lytic virus replication. BMRF1 is also a transactivator.
This family is predicted to have a UL42 like structure.
Length = 381
Score = 30.0 bits (68), Expect = 5.2
Identities = 13/39 (33%), Positives = 22/39 (56%), Gaps = 1/39 (2%)
Query: 264 IHQDMTKPLSHYFINSSH-NTYLTGDQFSSESSCEAYVR 301
HQ+MT+P+S F N+S NT+L + + +A +
Sbjct: 66 NHQEMTEPVSLSFRNTSLGNTFLHSRELFGSNVEDASLA 104
>gnl|CDD|212984 cd12051, SH3_DOCK1_5_A, Src Homology 3 domain of Class A Dedicator
of Cytokinesis proteins 1 and 5. Dock1, also called
Dock180, and Dock5 are class A DOCKs and are atypical
guanine nucleotide exchange factors (GEFs) that lack the
conventional Dbl homology (DH) domain. Dock1 interacts
with the scaffold protein Elmo and the resulting complex
functions upstream of Rac in many biological events
including phagocytosis of apoptotic cells, cell
migration and invasion. Dock5 functions upstream of Rac1
to regulate osteoclast function. All DOCKs contain two
homology domains: the DHR-1 (Dock homology region-1),
also called CZH1 (CED-5, Dock180, and MBC-zizimin
homology 1), and DHR-2 (also called CZH2 or Docker). The
DHR-1 domain binds
phosphatidylinositol-3,4,5-triphosphate while DHR-2
contains the catalytic activity for Rac and/or Cdc42.
Class A DOCKs also contain an SH3 domain at the
N-terminal region and a PxxP motif at the C-terminus;
they are specific GEFs for Rac. The SH3 domain of Dock1
binds to DHR-2 in an autoinhibitory manner; binding of
Elmo to the SH3 domain of Dock1 exposes the DHR-2 domain
and promotes GEF 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 = 56
Score = 27.1 bits (60), Expect = 5.5
Identities = 18/51 (35%), Positives = 27/51 (52%), Gaps = 3/51 (5%)
Query: 789 ALYDYQARNDDELSFPKHAIISNVTRAEGGWWRGDYGGKRMH--WFPSNYV 837
A+Y+Y AR DELS + + E GW+RG K+ FP++Y+
Sbjct: 4 AIYNYDARGPDELSLQIGDTVHILETYE-GWYRGYTLRKKSKKGIFPASYI 53
>gnl|CDD|176514 cd08572, GDPD_GDE5_like, Glycerophosphodiester phosphodiesterase
domain of mammalian glycerophosphodiester
phosphodiesterase GDE5-like proteins. This subfamily
corresponds to the glycerophosphodiester
phosphodiesterase domain (GDPD) present in mammalian
glycerophosphodiester phosphodiesterase GDE5-like
proteins. GDE5 is widely expressed in mammalian tissues,
with highest expression in spinal chord. Although its
biological function remains unclear, mammalian GDE5
shows higher sequence homology to fungal and plant
glycerophosphodiester phosphodiesterases (GP-GDEs, EC
3.1.4.46) than to other bacterial and mammalian GP-GDEs.
It may also hydrolyze glycerophosphodiesters to
sn-glycerol-3-phosphate (G3P) and the corresponding
alcohols.
Length = 293
Score = 29.9 bits (68), Expect = 5.8
Identities = 12/49 (24%), Positives = 23/49 (46%)
Query: 293 ESSCEAYVRCLRQGCRCIELDCWDGPDGTPIVYHGHTLTTKIKFKDVVK 341
E++ +++ + G +E D DG P++YH T++ K K
Sbjct: 22 ENTIASFLAAAKHGADMVEFDVQLTKDGVPVIYHDFTISVSEKSKTGSD 70
>gnl|CDD|212955 cd12022, SH3_p47phox_2, Second or C-terminal Src homology 3 domain
of the p47phox subunit of NADPH oxidase, also called
Neutrophil Cytosolic Factor 1. p47phox, or NCF1, is a
cytosolic subunit of the phagocytic NADPH oxidase
complex (also called Nox2 or gp91phox), which plays a
key role in the ability of phagocytes to defend against
bacterial infections. NADPH oxidase catalyzes the
transfer of electrons from NADPH to oxygen during
phagocytosis forming superoxide and reactive oxygen
species. p47phox is required for activation of NADH
oxidase and plays a role in translocation. It contains
an N-terminal Phox homology (PX) domain, tandem SH3
domains (N-SH3 and C-SH3), a polybasic/autoinhibitory
region, and a C-terminal proline-rich region (PRR). This
model characterizes the second SH3 domain (or C-SH3) of
p47phox. In its inactive state, the tandem SH3 domains
interact intramolecularly with the autoinhibitory
region; upon activation, the tandem SH3 domains are
exposed through a conformational change, resulting in
their binding to the PRR of p22phox and the activation
of NADPH oxidase. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 27.1 bits (60), Expect = 6.1
Identities = 15/53 (28%), Positives = 25/53 (47%), Gaps = 7/53 (13%)
Query: 788 KALYDYQARNDDELSFPKHAIISNVTRAEGGWW---RGDYGGKRMHWFPSNYV 837
+ Y A +DEL+ + I + + GWW +G+ G +FPS Y+
Sbjct: 3 ITIKAYTAVEEDELTLLEGEAIEVIHKLLDGWWVVRKGEVTG----YFPSMYL 51
>gnl|CDD|178097 PLN02479, PLN02479, acetate-CoA ligase.
Length = 567
Score = 29.8 bits (67), Expect = 6.3
Identities = 18/58 (31%), Positives = 25/58 (43%), Gaps = 16/58 (27%)
Query: 404 KILLKHKKLPEGS-----DEQ---TPCAI--------AKDEGKLAEDKIKHCRIRVEG 445
++ H + E S DE+ +PCA DE LAED +K CR R+
Sbjct: 470 NVVYTHPAVLEASVVARPDERWGESPCAFVTLKPGVDKSDEAALAEDIMKFCRERLPA 527
>gnl|CDD|232883 TIGR00225, prc, C-terminal peptidase (prc). A C-terminal peptidase
with different substrates in different species including
processing of D1 protein of the photosystem II reaction
center in higher plants and cleavage of a peptide of 11
residues from the precursor form of penicillin-binding
protein in E.coli E.coli and H influenza have the most
distal branch of the tree and their proteins have an
N-terminal 200 amino acids that show no homology to
other proteins in the database [Protein fate,
Degradation of proteins, peptides, and glycopeptides,
Protein fate, Protein modification and repair].
Length = 334
Score = 29.6 bits (67), Expect = 6.4
Identities = 12/51 (23%), Positives = 22/51 (43%), Gaps = 2/51 (3%)
Query: 716 GRLYTIGTTQF-ESLVE-LISYYERHPLYKKIELWYPVSEDLIQRMGLEPD 764
GR +G F + V+ + + + I +Y + I + G+EPD
Sbjct: 260 GRATIVGEKTFGKGTVQQVRPLNDGSGIKVTIAKYYTPNGGSIHKKGIEPD 310
>gnl|CDD|176532 cd08590, PI-PLCc_Rv2075c_like, Catalytic domain of uncharacterized
Mycobacterium tuberculosis Rv2075c-like proteins. This
subfamily corresponds to the catalytic domain present in
uncharacterized Mycobacterium tuberculosis Rv2075c and
its homologs. Members in this family are more closely
related to the Streptomyces antibioticus
phosphatidylinositol-specific phospholipase
C1(SaPLC1)-like proteins rather than the typical
bacterial phosphatidylinositol-specific phospholipase C
(PI-PLC, EC 4.6.1.13), which participate in
Ca2+-independent PI metabolism, hydrolyzing the membrane
lipid phosphatidylinositol (PI) to produce
phosphorylated myo-inositol and diacylglycerol (DAG). In
contrast, SaPLC1-like proteins have two Ca2+-chelating
amino acid substitutions which convert them to
metal-dependent bacterial PI-PLC. Rv2075c and its
homologs have the same amino acid substitutions as well,
which might suggest they have metal-dependent PI-PLC
activity.
Length = 267
Score = 29.7 bits (67), Expect = 6.6
Identities = 25/116 (21%), Positives = 35/116 (30%), Gaps = 26/116 (22%)
Query: 267 DMTKPLSHYFINSSHNTYLTGDQFSSESSCEAYVRC--------------LRQGCRCIEL 312
D PL I +HN+Y + + Y L G R +EL
Sbjct: 5 DSNAPLCQAQILGTHNSYNS----RAYGYGNRYHGVRYLDPNQELSITDQLDLGARFLEL 60
Query: 313 DCWDGPDGTPIVYHGHTL-------TTKIKFKDVVKTIRDHAFETSKYPVILSIED 361
D + HG + F+D + I D VIL +ED
Sbjct: 61 DVHWTTGDL-RLCHGGDHGYLGVCSSEDRLFEDGLNEIADWLNANPDEVVILYLED 115
>gnl|CDD|218576 pfam05395, DARPP-32, Protein phosphatase inhibitor 1/DARPP-32.
This family consists of several mammalian protein
phosphatase inhibitor 1 (IPP-1) and dopamine- and
cAMP-regulated neuronal phosphoprotein (DARPP-32)
proteins. Protein phosphatase inhibitor-1 is involved in
signal transduction and is an endogenous inhibitor of
protein phosphatase-1. It has been demonstrated that
DARPP-32, if phosphorylated, can inhibit
protein-phosphatase-1. DARPP-32 has a key role in many
neurotransmitter pathways throughout the brain and has
been shown to be involved in controlling receptors, ion
channels and other physiological factors including the
brain's response to drugs of abuse, such as cocaine,
opiates and nicotine. DARPP-32 is reciprocally regulated
by the two neurotransmitters that are most often
implicated in schizophrenia - dopamine and glutamate.
Dopamine activates DARPP-32 through the D1 receptor
pathway and disables DARPP-32 through the D2 receptor.
Glutamate, acting through the N-methyl-d-aspartate
receptor, renders DARPP-32 inactive. A mutant form of
DARPP-32 has been linked with gastric cancers.
Length = 170
Score = 28.7 bits (64), Expect = 7.7
Identities = 19/74 (25%), Positives = 26/74 (35%), Gaps = 10/74 (13%)
Query: 598 LQEPVPQPNQHEDKEWYHPTATRSQAEDLLRRVPSDGAFLVRPSENDNSSYEPVPQPNQH 657
+Q VP P D AE + RR P+ A LV SE + + PNQ
Sbjct: 9 IQFTVPLPEPQLDPR---------AAEMIRRRRPTP-ATLVLVSEQSSPEIDEERTPNQL 58
Query: 658 EDKEWYHPTATRSQ 671
+ + R
Sbjct: 59 QKGSLQMSPSQRKN 72
>gnl|CDD|212123 cd10812, GH38N_AMII_ScAms1_like, N-terminal catalytic domain of
yeast vacuolar alpha-mannosidases and similar proteins;
glycoside hydrolase family 38 (GH38). The family is
represented by Saccharomyces cerevisiae
alpha-mannosidase (Ams1) and its eukaryotic homologs.
Ams1 functions as a second resident vacuolar hydrolase
in S. cerevisiae. It aids in recycling macromolecular
components of the cell through hydrolysis of terminal,
non-reducing alpha-d-mannose residues. Ams1 forms an
oligomer in the cytoplasm and retains its oligomeric
form during the import process. It utilizes both the Cvt
(nutrient-rich conditions) and autophagic (starvation
conditions) pathways for biosynthetic delivery to the
vacuole. Mutants in either pathway are defective in Ams1
import. Members in this family show high sequence
similarity with rat ER/cytosolic alpha-mannosidase
Man2C1.
Length = 258
Score = 29.3 bits (66), Expect = 8.0
Identities = 12/35 (34%), Positives = 20/35 (57%), Gaps = 3/35 (8%)
Query: 315 WDGPDGTPIVYH---GHTLTTKIKFKDVVKTIRDH 346
W G DGT ++ H +T T DV+++I++H
Sbjct: 161 WVGIDGTQVLVHMTPVNTYTADASVGDVLRSIKNH 195
>gnl|CDD|222834 PHA01755, PHA01755, hypothetical protein.
Length = 562
Score = 29.6 bits (66), Expect = 8.1
Identities = 11/26 (42%), Positives = 14/26 (53%)
Query: 539 IGDYSLSFWWQGRVNHCRIRSKPESG 564
IG S S WQ N R+R+ P +G
Sbjct: 521 IGTVSSSNTWQTAWNFMRMRAYPPNG 546
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
0.319 0.136 0.417
Gapped
Lambda K H
0.267 0.0813 0.140
Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 44354
Number of Hits to DB: 44,177,220
Number of extensions: 4412297
Number of successful extensions: 4504
Number of sequences better than 10.0: 1
Number of HSP's gapped: 4216
Number of HSP's successfully gapped: 559
Length of query: 851
Length of database: 10,937,602
Length adjustment: 105
Effective length of query: 746
Effective length of database: 6,280,432
Effective search space: 4685202272
Effective search space used: 4685202272
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 (21.7 bits)
S2: 63 (27.9 bits)