RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy12793
(352 letters)
>gnl|CDD|213014 cd12081, SH3_CASK, Src Homology 3 domain of
Calcium/calmodulin-dependent Serine protein Kinase.
CASK is a scaffolding protein that is highly expressed
in the mammalian nervous system and plays roles in
synaptic protein targeting, neural development, and gene
expression regulation. CASK interacts with many
different binding partners including parkin, neurexin,
syndecans, calcium channel proteins, caskin, among
others, to perform specific functions in different
subcellular locations. Disruption of the CASK gene in
mice results in neonatal lethality while mutations in
the human gene have been associated with X-linked mental
retardation. Drosophila CASK is associated with both
pre- and postsynaptic membranes and is crucial in
synaptic transmission and vesicle cycling. CASK contains
an N-terminal calmodulin-dependent kinase (CaMK)-like
domain, two L27 domains, followed by the core of three
domains characteristic of MAGUK (membrane-associated
guanylate kinase) proteins: PDZ, SH3, and guanylate
kinase (GuK). In addition, it also contains the Hook
(Protein 4.1 Binding) motif in between the SH3 and GuK
domains. The GuK domain in MAGUK proteins is
enzymatically inactive; instead, the domain mediates
protein-protein interactions and associates
intramolecularly with the SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 62
Score = 125 bits (315), Expect = 2e-36
Identities = 47/62 (75%), Positives = 54/62 (87%), Gaps = 1/62 (1%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDN-VAGSAGLIPSP 125
+VRAQF Y+PL DDLIPC QAGI F++GDILQIISKDDHNWWQA+ +N G+AGLIPSP
Sbjct: 1 YVRAQFEYDPLKDDLIPCKQAGIRFRVGDILQIISKDDHNWWQAKLENSKNGTAGLIPSP 60
Query: 126 EL 127
EL
Sbjct: 61 EL 62
Score = 62.6 bits (152), Expect = 7e-13
Identities = 24/33 (72%), Positives = 28/33 (84%), Gaps = 1/33 (3%)
Query: 230 MFQIISKDDHNWWQARKDN-VAGSAGLIPSPEL 261
+ QIISKDDHNWWQA+ +N G+AGLIPSPEL
Sbjct: 30 ILQIISKDDHNWWQAKLENSKNGTAGLIPSPEL 62
>gnl|CDD|212968 cd12035, SH3_MPP1-like, Src Homology 3 domain of Membrane Protein,
Palmitoylated 1 (or MAGUK p55 subfamily member 1)-like
proteins. This subfamily includes MPP1, CASK
(Calcium/calmodulin-dependent Serine protein Kinase),
Caenorhabditis elegans lin-2, and similar proteins. MPP1
and CASK are scaffolding proteins from 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). In
addition, they also have the Hook (Protein 4.1 Binding)
motif in between the SH3 and GuK domains. The GuK domain
in MAGUK proteins is enzymatically inactive; instead,
the domain mediates protein-protein interactions and
associates intramolecularly with the SH3 domain. CASK
and lin-2 also contain an N-terminal
calmodulin-dependent kinase (CaMK)-like domain and two
L27 domains. MPP1 is ubiquitously-expressed and plays
roles in regulating neutrophil polarity, cell shape,
hair cell development, and neural development and
patterning of the retina. CASK is highly expressed in
the mammalian nervous system and plays roles in synaptic
protein targeting, neural development, and gene
expression regulation. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
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 = 121 bits (304), Expect = 1e-34
Identities = 47/62 (75%), Positives = 52/62 (83%), Gaps = 1/62 (1%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVA-GSAGLIPSP 125
+VRAQF+Y+P DDLIPC QAGIAF+ GDILQIISKDDHNWWQARK + AGLIPSP
Sbjct: 1 YVRAQFDYDPSKDDLIPCQQAGIAFKTGDILQIISKDDHNWWQARKPGASKEPAGLIPSP 60
Query: 126 EL 127
EL
Sbjct: 61 EL 62
Score = 61.3 bits (149), Expect = 2e-12
Identities = 24/36 (66%), Positives = 26/36 (72%), Gaps = 1/36 (2%)
Query: 227 CSVMFQIISKDDHNWWQARKDNVA-GSAGLIPSPEL 261
+ QIISKDDHNWWQARK + AGLIPSPEL
Sbjct: 27 TGDILQIISKDDHNWWQARKPGASKEPAGLIPSPEL 62
>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 = 106 bits (268), Expect = 3e-29
Identities = 37/61 (60%), Positives = 49/61 (80%), Gaps = 1/61 (1%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARK-DNVAGSAGLIPSP 125
FVRA F+Y+P +D LIPC +AG++F+ GDILQI+++DD NWWQARK + G AGLIPS
Sbjct: 1 FVRALFDYDPEEDPLIPCKEAGLSFKKGDILQIVNQDDPNWWQARKVGDPNGRAGLIPSQ 60
Query: 126 E 126
+
Sbjct: 61 D 61
Score = 51.4 bits (124), Expect = 6e-09
Identities = 18/30 (60%), Positives = 23/30 (76%), Gaps = 1/30 (3%)
Query: 232 QIISKDDHNWWQARK-DNVAGSAGLIPSPE 260
QI+++DD NWWQARK + G AGLIPS +
Sbjct: 32 QIVNQDDPNWWQARKVGDPNGRAGLIPSQD 61
>gnl|CDD|213013 cd12080, SH3_MPP1, Src Homology 3 domain of Membrane Protein,
Palmitoylated 1 (or MAGUK p55 subfamily member 1).
MPP1, also called 55 kDa erythrocyte membrane protein
(p55), is a ubiquitously-expressed scaffolding protein
that plays roles in regulating neutrophil polarity, cell
shape, hair cell development, and neural development and
patterning of the retina. It was originally identified
as an erythrocyte protein that stabilizes the actin
cytoskeleton to the plasma membrane by forming a complex
with 4.1R protein and glycophorin C. MPP1 is one of
seven vertebrate homologs of the Drosophila Stardust
protein, which is required in establishing cell
polarity, and it contains the three domains
characteristic of MAGUK (membrane-associated guanylate
kinase) proteins: PDZ, SH3, and guanylate kinase (GuK).
In addition, it also contains the Hook (Protein 4.1
Binding) motif in between the SH3 and GuK domains. The
GuK domain in MAGUK proteins is enzymatically inactive;
instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 62
Score = 102 bits (255), Expect = 2e-27
Identities = 39/62 (62%), Positives = 50/62 (80%), Gaps = 1/62 (1%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQAR-KDNVAGSAGLIPSP 125
++RAQF+Y+P D+LIPC +AG+ FQ GDI+QII+KDD NWWQ R + + SAGLIPSP
Sbjct: 1 YMRAQFDYDPKKDNLIPCKEAGLKFQTGDIIQIINKDDSNWWQGRVEGSGEESAGLIPSP 60
Query: 126 EL 127
EL
Sbjct: 61 EL 62
Score = 52.3 bits (125), Expect = 3e-09
Identities = 21/33 (63%), Positives = 25/33 (75%), Gaps = 1/33 (3%)
Query: 230 MFQIISKDDHNWWQAR-KDNVAGSAGLIPSPEL 261
+ QII+KDD NWWQ R + + SAGLIPSPEL
Sbjct: 30 IIQIINKDDSNWWQGRVEGSGEESAGLIPSPEL 62
>gnl|CDD|212969 cd12036, SH3_MPP5, Src Homology 3 domain of Membrane Protein,
Palmitoylated 5 (or MAGUK p55 subfamily member 5).
MPP5, also called PALS1 (Protein associated with Lin7)
or Nagie oko protein in zebrafish or Stardust in
Drosophila, is a scaffolding protein which associates
with Crumbs homolog 1 (CRB1), CRB2, or CRB3 through its
PDZ domain and with PALS1-associated tight junction
protein (PATJ) or multi-PDZ domain protein 1 (MUPP1)
through its L27 domain. The resulting tri-protein
complexes are core proteins of the Crumb complex, which
localizes at tight junctions or subapical regions, and
is involved in the maintenance of apical-basal polarity
in epithelial cells and the morphogenesis and function
of photoreceptor cells. MPP5 is critical for the proper
stratification of the retina and is also expressed in T
lymphocytes where it is important for TCR-mediated
activation of NFkB. Drosophila Stardust exists in
several isoforms, some of which show opposing functions
in photoreceptor cells, which suggests that the relative
ratio of different Crumbs complexes regulates
photoreceptor homeostasis. MPP5 contains two L27 domains
followed by the core of three domains characteristic of
MAGUK (membrane-associated guanylate kinase) proteins:
PDZ, SH3, and guanylate kinase (GuK). In addition, it
also contains the Hook (Protein 4.1 Binding) motif in
between the SH3 and GuK domains. The GuK domain in MAGUK
proteins is enzymatically inactive; instead, the domain
mediates protein-protein interactions and associates
intramolecularly with the SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 63
Score = 80.9 bits (200), Expect = 2e-19
Identities = 32/62 (51%), Positives = 43/62 (69%), Gaps = 3/62 (4%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKD---NVAGSAGLIPS 124
VRA F+Y+P DD IPC + G++FQ GDIL +IS++D NWWQA ++ + AGLIPS
Sbjct: 2 VRAHFDYDPEDDPYIPCRELGLSFQKGDILHVISQEDPNWWQAYREGEEDNQSLAGLIPS 61
Query: 125 PE 126
Sbjct: 62 KS 63
Score = 37.8 bits (88), Expect = 5e-04
Identities = 14/31 (45%), Positives = 20/31 (64%), Gaps = 3/31 (9%)
Query: 233 IISKDDHNWWQARKD---NVAGSAGLIPSPE 260
+IS++D NWWQA ++ + AGLIPS
Sbjct: 33 VISQEDPNWWQAYREGEEDNQSLAGLIPSKS 63
>gnl|CDD|212970 cd12037, SH3_MPP2, Src Homology 3 domain of Membrane Protein,
Palmitoylated 2 (or MAGUK p55 subfamily member 2). MPP2
is a scaffolding protein that interacts with the
non-receptor tyrosine kinase c-Src in epithelial cells
to negatively regulate its activity and morphological
function. It is one of seven vertebrate homologs of the
Drosophila Stardust protein, which is required in
establishing cell polarity, and it contains two L27
domains followed by the core of three domains
characteristic of MAGUK (membrane-associated guanylate
kinase) proteins: PDZ, SH3, and guanylate kinase (GuK).
In addition, it also contains the Hook (Protein 4.1
Binding) motif in between the SH3 and GuK domains. The
GuK domain in MAGUK proteins is enzymatically inactive;
instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 59
Score = 78.8 bits (194), Expect = 8e-19
Identities = 32/58 (55%), Positives = 43/58 (74%), Gaps = 1/58 (1%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
FV+ F+Y+P D LIPC +AG+ F+ GD+LQI++++D NWWQA GSAGLIPS
Sbjct: 1 FVKCHFDYDPSSDSLIPCKEAGLKFRAGDLLQIVNQEDPNWWQACHVE-GGSAGLIPS 57
Score = 37.6 bits (87), Expect = 5e-04
Identities = 16/29 (55%), Positives = 21/29 (72%), Gaps = 1/29 (3%)
Query: 230 MFQIISKDDHNWWQARKDNVAGSAGLIPS 258
+ QI++++D NWWQA GSAGLIPS
Sbjct: 30 LLQIVNQEDPNWWQACHVE-GGSAGLIPS 57
>gnl|CDD|212971 cd12038, SH3_MPP6, Src Homology 3 domain of Membrane Protein,
Palmitoylated 6 (or MAGUK p55 subfamily member 6).
MPP6, also called Veli-associated MAGUK 1 (VAM-1) or
PALS2, is a scaffolding protein that binds to Veli-1, a
homolog of Caenorhabditis Lin-7. It is one of seven
vertebrate homologs of the Drosophila Stardust protein,
which is required in establishing cell polarity, and it
contains two L27 domains followed by the core of three
domains characteristic of MAGUK (membrane-associated
guanylate kinase) proteins: PDZ, SH3, and guanylate
kinase (GuK). In addition, it also contains the Hook
(Protein 4.1 Binding) motif in between the SH3 and GuK
domains. The GuK domain in MAGUK proteins is
enzymatically inactive; instead, the domain mediates
protein-protein interactions and associates
intramolecularly with the SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 61
Score = 78.6 bits (193), Expect = 1e-18
Identities = 33/58 (56%), Positives = 44/58 (75%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
FV+ F+YNP +D+LIPC +AG+ F G+ILQI++++D NWWQA GSAGLIPS
Sbjct: 1 FVKCHFDYNPYNDNLIPCKEAGLKFSKGEILQIVNREDPNWWQASHVKEGGSAGLIPS 58
Score = 38.5 bits (89), Expect = 3e-04
Identities = 16/29 (55%), Positives = 21/29 (72%)
Query: 230 MFQIISKDDHNWWQARKDNVAGSAGLIPS 258
+ QI++++D NWWQA GSAGLIPS
Sbjct: 30 ILQIVNREDPNWWQASHVKEGGSAGLIPS 58
>gnl|CDD|212967 cd12034, SH3_MPP4, Src Homology 3 domain of Membrane Protein,
Palmitoylated 4 (or MAGUK p55 subfamily member 4).
MPP4, also called Disks Large homolog 6 (DLG6) or
Amyotrophic lateral sclerosis 2 chromosomal region
candidate gene 5 protein (ALS2CR5), is a retina-specific
scaffolding protein that plays a role in organizing
presynaptic protein complexes in the photoreceptor
synapse, where it localizes to the plasma membrane. It
is required in the proper localization of calcium
ATPases and for maintenance of calcium homeostasis. MPP4
is one of seven vertebrate homologs of the Drosophila
Stardust protein, which is required in establishing cell
polarity, and it contains two L27 domains followed by
the core of three domains characteristic of MAGUK
(membrane-associated guanylate kinase) proteins: PDZ,
SH3, and guanylate kinase (GuK). The GuK domain in MAGUK
proteins is enzymatically inactive; instead, the domain
mediates protein-protein interactions and associates
intramolecularly with the SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 61
Score = 77.2 bits (190), Expect = 4e-18
Identities = 32/59 (54%), Positives = 41/59 (69%), Gaps = 1/59 (1%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGS-AGLIPS 124
+VRA +Y P D IPCA AG+ F+ GDILQI+ ++D WWQARK + + AGLIPS
Sbjct: 1 YVRAMVDYWPQQDPSIPCADAGLPFRKGDILQIVDQNDSLWWQARKLSDLAACAGLIPS 59
Score = 36.4 bits (84), Expect = 0.001
Identities = 15/30 (50%), Positives = 21/30 (70%), Gaps = 1/30 (3%)
Query: 230 MFQIISKDDHNWWQARKDNVAGS-AGLIPS 258
+ QI+ ++D WWQARK + + AGLIPS
Sbjct: 30 ILQIVDQNDSLWWQARKLSDLAACAGLIPS 59
>gnl|CDD|212966 cd12033, SH3_MPP7, Src Homology 3 domain of Membrane Protein,
Palmitoylated 7 (or MAGUK p55 subfamily member 7). MPP7
is a scaffolding protein that binds to DLG1 and promotes
tight junction formation and epithelial cell polarity.
Mutations in the MPP7 gene may be associated with the
pathogenesis of diabetes and extreme bone mineral
density. It is one of seven vertebrate homologs of the
Drosophila Stardust protein, which is required in
establishing cell polarity, and it contains two L27
domains followed by the core of three domains
characteristic of MAGUK (membrane-associated guanylate
kinase) proteins: PDZ, SH3, and guanylate kinase (GuK).
The GuK domain in MAGUK proteins is enzymatically
inactive; instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 61
Score = 76.2 bits (187), Expect = 7e-18
Identities = 33/59 (55%), Positives = 45/59 (76%), Gaps = 1/59 (1%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAG-SAGLIPS 124
F++A F+YNP +D IPC +AG++F+ GDILQI+S+DD WWQA+ + A AGLIPS
Sbjct: 1 FIKALFDYNPNEDKAIPCKEAGLSFKKGDILQIMSQDDATWWQAKHEGDANPRAGLIPS 59
Score = 35.4 bits (81), Expect = 0.003
Identities = 16/30 (53%), Positives = 21/30 (70%), Gaps = 1/30 (3%)
Query: 230 MFQIISKDDHNWWQARKDNVAG-SAGLIPS 258
+ QI+S+DD WWQA+ + A AGLIPS
Sbjct: 30 ILQIMSQDDATWWQAKHEGDANPRAGLIPS 59
>gnl|CDD|212972 cd12039, SH3_MPP3, Src Homology 3 domain of Membrane Protein,
Palmitoylated 3 (or MAGUK p55 subfamily member 3). MPP3
is a scaffolding protein that colocalizes with MPP5 and
CRB1 at the subdpical region adjacent to adherens
junctions and may function in photoreceptor polarity. It
interacts with some nectins and regulates their
trafficking and processing. Nectins are cell-cell
adhesion proteins involved in the establishment
apical-basal polarity at cell adhesion sites. It is one
of seven vertebrate homologs of the Drosophila Stardust
protein, which is required in establishing cell
polarity, and it contains two L27 domains followed by
the core of three domains characteristic of MAGUK
(membrane-associated guanylate kinase) proteins: PDZ,
SH3, and guanylate kinase (GuK). The GuK domain in MAGUK
proteins is enzymatically inactive; instead, the domain
mediates protein-protein interactions and associates
intramolecularly with the SH3 domain. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 62
Score = 70.4 bits (172), Expect = 1e-15
Identities = 30/59 (50%), Positives = 43/59 (72%), Gaps = 1/59 (1%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARK-DNVAGSAGLIPS 124
F+RA F+YNP +D IPC +AG+ F+ DIL+++S+DD WWQA++ + AGLIPS
Sbjct: 1 FMRALFDYNPYEDRAIPCQEAGLPFKRRDILEVVSQDDPTWWQAKRVGDTNLRAGLIPS 59
Score = 32.2 bits (73), Expect = 0.039
Identities = 13/30 (43%), Positives = 21/30 (70%), Gaps = 1/30 (3%)
Query: 230 MFQIISKDDHNWWQARK-DNVAGSAGLIPS 258
+ +++S+DD WWQA++ + AGLIPS
Sbjct: 30 ILEVVSQDDPTWWQAKRVGDTNLRAGLIPS 59
>gnl|CDD|212795 cd11861, SH3_DLG-like, Src Homology 3 domain of Disks large homolog
proteins. The DLG-like proteins are scaffolding
proteins that cluster at synapses and are also called
PSD (postsynaptic density)-95 proteins or SAPs
(synapse-associated proteins). They play important roles
in synaptic development and plasticity, cell polarity,
migration and proliferation. They are members of the
MAGUK (membrane-associated guanylate kinase) protein
family, which is characterized by the presence of a core
of three domains: PDZ, SH3, and guanylate kinase (GuK).
The GuK domain in MAGUK proteins is enzymatically
inactive; instead, the domain mediates protein-protein
interactions and associates intramolecularly with the
SH3 domain. DLG-like proteins contain three PDZ domains
and varying N-terminal regions. All DLG proteins exist
as alternatively-spliced isoforms. Vertebrates contain
four DLG proteins from different genes, called DLG1-4.
DLG4 and DLG2 are found predominantly at postsynaptic
sites and they mediate surface ion channel and receptor
clustering. DLG3 is found axons and some presynaptic
terminals. DLG1 interacts with AMPA-type glutamate
receptors and is critical in their maturation and
delivery to synapses. The SH3 domain of DLG4 binds and
clusters the kainate subgroup of glutamate receptors via
two proline-rich sequences in their C-terminal tail. It
also binds AKAP79/150 (A-kinase anchoring protein). SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in 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 = 56.2 bits (136), Expect = 1e-10
Identities = 24/61 (39%), Positives = 36/61 (59%), Gaps = 5/61 (8%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARK---DNVAGSAGLIP 123
+VRA F+Y+P D +P G++F+ GDIL + + D WWQAR+ + G+IP
Sbjct: 1 YVRALFDYDPSRDSGLP--SQGLSFKFGDILHVTNASDDEWWQARRVTPNGEEEEVGVIP 58
Query: 124 S 124
S
Sbjct: 59 S 59
Score = 28.8 bits (65), Expect = 0.62
Identities = 10/29 (34%), Positives = 15/29 (51%), Gaps = 3/29 (10%)
Query: 233 IISKDDHNWWQARK---DNVAGSAGLIPS 258
+ + D WWQAR+ + G+IPS
Sbjct: 31 VTNASDDEWWQARRVTPNGEEEEVGVIPS 59
>gnl|CDD|201353 pfam00625, Guanylate_kin, Guanylate kinase.
Length = 183
Score = 58.1 bits (141), Expect = 4e-10
Identities = 21/44 (47%), Positives = 32/44 (72%), Gaps = 2/44 (4%)
Query: 288 FSVYRRDTTRSPRSDEENGRAYYFISHDEMMSDIAANQYLEYGK 331
+SV TTR PR E +G+ Y+F+S +EM +DI+AN++LEY +
Sbjct: 32 YSVSH--TTRPPRPGEVDGKDYHFVSKEEMENDISANEFLEYAE 73
Score = 51.6 bits (124), Expect = 7e-08
Identities = 15/35 (42%), Positives = 25/35 (71%)
Query: 187 KRKTLVLLGAHGVGRRHIKNTLINKFPDKYAYPVP 221
+R+ +VL G GVG+ HIK L++++P+K+ Y V
Sbjct: 1 QRRPIVLSGPSGVGKSHIKKALLDEYPEKFGYSVS 35
>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 = 54.5 bits (132), Expect = 4e-10
Identities = 20/58 (34%), Positives = 29/58 (50%), Gaps = 9/58 (15%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
VRA ++Y D D ++F+ GDI+ ++ K D WW+ R G GL PS
Sbjct: 4 QVRALYDYTAQDPD-------ELSFKKGDIITVLEKSDDGWWKGRLGR--GKEGLFPS 52
Score = 32.9 bits (76), Expect = 0.017
Identities = 10/29 (34%), Positives = 14/29 (48%), Gaps = 2/29 (6%)
Query: 230 MFQIISKDDHNWWQARKDNVAGSAGLIPS 258
+ ++ K D WW+ R G GL PS
Sbjct: 26 IITVLEKSDDGWWKGRLGR--GKEGLFPS 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 = 54.3 bits (131), Expect = 5e-10
Identities = 23/64 (35%), Positives = 36/64 (56%), Gaps = 9/64 (14%)
Query: 66 IFVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSP 125
+VRA F++ DD+ +P F+ G+IL +I K + WW AR N G G+IP P
Sbjct: 1 EYVRALFDFPGNDDEDLP-------FKKGEILTVIRKPEEQWWNAR--NSEGKTGMIPVP 51
Query: 126 ELQE 129
+++
Sbjct: 52 YVEK 55
Score = 34.6 bits (80), Expect = 0.004
Identities = 12/32 (37%), Positives = 18/32 (56%), Gaps = 2/32 (6%)
Query: 232 QIISKDDHNWWQARKDNVAGSAGLIPSPELQE 263
+I K + WW AR N G G+IP P +++
Sbjct: 26 TVIRKPEEQWWNAR--NSEGKTGMIPVPYVEK 55
>gnl|CDD|238026 cd00071, GMPK, Guanosine monophosphate kinase (GMPK, EC 2.7.4.8),
also known as guanylate kinase (GKase), catalyzes the
reversible phosphoryl transfer from adenosine
triphosphate (ATP) to guanosine monophosphate (GMP) to
yield adenosine diphosphate (ADP) and guanosine
diphosphate (GDP). It plays an essential role in the
biosynthesis of guanosine triphosphate (GTP). This
enzyme is also important for the activation of some
antiviral and anticancer agents, such as acyclovir,
ganciclovir, carbovir, and thiopurines.
Length = 137
Score = 55.6 bits (135), Expect = 1e-09
Identities = 17/47 (36%), Positives = 25/47 (53%), Gaps = 2/47 (4%)
Query: 283 SFSLPFSVYRRDTTRSPRSDEENGRAYYFISHDEMMSDIAANQYLEY 329
+ FSV TTR PR E +G Y+F+S +E I ++LE+
Sbjct: 24 DPNFGFSVSH--TTRKPRPGEVDGVDYHFVSKEEFERLIENGEFLEW 68
>gnl|CDD|213788 TIGR03263, guanyl_kin, guanylate kinase. Members of this family
are the enzyme guanylate kinase, also called GMP kinase.
This enzyme transfers a phosphate from ATP to GMP,
yielding ADP and GDP [Purines, pyrimidines, nucleosides,
and nucleotides, Nucleotide and nucleoside
interconversions].
Length = 179
Score = 55.6 bits (135), Expect = 3e-09
Identities = 15/35 (42%), Positives = 22/35 (62%)
Query: 295 TTRSPRSDEENGRAYYFISHDEMMSDIAANQYLEY 329
TTR PR E +G Y+F+S +E I A ++LE+
Sbjct: 34 TTRKPRPGEVDGVDYFFVSKEEFEEMIKAGEFLEW 68
>gnl|CDD|214504 smart00072, GuKc, Guanylate kinase homologues. Active enzymes
catalyze ATP-dependent phosphorylation of GMP to GDP.
Structure resembles that of adenylate kinase. So-called
membrane-associated guanylate kinase homologues (MAGUKs)
do not possess guanylate kinase activities; instead at
least some possess protein-binding functions.
Length = 174
Score = 54.2 bits (131), Expect = 7e-09
Identities = 21/53 (39%), Positives = 28/53 (52%), Gaps = 4/53 (7%)
Query: 278 QGIYSSFSLPFSVYRRDTTRSPRSDEENGRAYYFISHDEMMSDIAANQYLEYG 330
Q I +F V TTR PR E NG Y+F+S +E DI + +LE+G
Sbjct: 14 QEIPDAFE--RVVSH--TTRPPRPGEVNGVDYHFVSKEEFEDDIKSGLFLEWG 62
Score = 36.5 bits (85), Expect = 0.009
Identities = 8/25 (32%), Positives = 12/25 (48%)
Query: 197 HGVGRRHIKNTLINKFPDKYAYPVP 221
GVG+ + LI + PD + V
Sbjct: 1 SGVGKGTLLAELIQEIPDAFERVVS 25
>gnl|CDD|212965 cd12032, SH3_DLG2, Src Homology 3 domain of Disks Large homolog 2.
DLG2, also called postsynaptic density-93 (PSD93) or
Channel-associated protein of synapse-110 (chapsyn 110),
is a scaffolding protein that clusters at synapses and
plays an important role in synaptic development and
plasticity. The DLG2 delta isoform binds inwardly
rectifying potassium Kir2 channels, which determine
resting membrane potential in neurons. It regulates the
spatial and temporal distribution of Kir2 channels
within neuronal membranes. DLG2 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. DLG2 contains three PDZ 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 = 74
Score = 51.2 bits (122), Expect = 1e-08
Identities = 25/62 (40%), Positives = 37/62 (59%), Gaps = 5/62 (8%)
Query: 66 IFVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSA---GLI 122
++VRA F+Y D +P G++F+ GDIL +I+ D WWQAR+ G + G+I
Sbjct: 6 LYVRAMFDYEKSKDSGLP--SQGLSFRYGDILHVINASDDEWWQARRVTPDGDSEEMGVI 63
Query: 123 PS 124
PS
Sbjct: 64 PS 65
Score = 28.1 bits (62), Expect = 1.4
Identities = 12/32 (37%), Positives = 18/32 (56%), Gaps = 3/32 (9%)
Query: 230 MFQIISKDDHNWWQARKDNVAGSA---GLIPS 258
+ +I+ D WWQAR+ G + G+IPS
Sbjct: 34 ILHVINASDDEWWQARRVTPDGDSEEMGVIPS 65
>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 = 50.2 bits (121), Expect = 1e-08
Identities = 17/63 (26%), Positives = 34/63 (53%), Gaps = 10/63 (15%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPE 126
+ R F+Y D + ++ + GD+++++ KDD+ WW+ + G GL+PS
Sbjct: 1 YGRVIFDYVATDPN-------ELSLKKGDVVKVLDKDDNGWWEGERG---GRRGLVPSSY 50
Query: 127 LQE 129
++E
Sbjct: 51 VEE 53
Score = 32.4 bits (75), Expect = 0.027
Identities = 11/33 (33%), Positives = 20/33 (60%), Gaps = 3/33 (9%)
Query: 231 FQIISKDDHNWWQARKDNVAGSAGLIPSPELQE 263
+++ KDD+ WW+ + G GL+PS ++E
Sbjct: 24 VKVLDKDDNGWWEGERG---GRRGLVPSSYVEE 53
>gnl|CDD|212964 cd12031, SH3_DLG1, Src Homology 3 domain of Disks Large homolog 1.
DLG1, also called synapse-associated protein 97 (SAP97),
is a scaffolding protein that clusters at synapses and
plays an important role in synaptic development and
plasticity. DLG1 plays roles in regulating cell
polarity, proliferation, migration, and cycle
progression. It interacts with AMPA-type glutamate
receptors and is critical in their maturation and
delivery to synapses. It also interacts with PKCalpha
and promotes wound healing. DLG1 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. DLG1 contains three PDZ 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 = 67
Score = 50.5 bits (120), Expect = 1e-08
Identities = 24/62 (38%), Positives = 37/62 (59%), Gaps = 5/62 (8%)
Query: 66 IFVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSA---GLI 122
++VRA F+Y+ D +P G+ F+ GDIL +++ D WWQAR+ G + G+I
Sbjct: 3 LYVRALFDYDKTKDSGLP--SQGLNFKFGDILHVVNASDDEWWQARQVTADGESEEIGVI 60
Query: 123 PS 124
PS
Sbjct: 61 PS 62
Score = 27.7 bits (61), Expect = 1.8
Identities = 11/32 (34%), Positives = 18/32 (56%), Gaps = 3/32 (9%)
Query: 230 MFQIISKDDHNWWQARKDNVAGSA---GLIPS 258
+ +++ D WWQAR+ G + G+IPS
Sbjct: 31 ILHVVNASDDEWWQARQVTADGESEEIGVIPS 62
>gnl|CDD|234719 PRK00300, gmk, guanylate kinase; Provisional.
Length = 205
Score = 53.6 bits (130), Expect = 2e-08
Identities = 14/35 (40%), Positives = 22/35 (62%)
Query: 295 TTRSPRSDEENGRAYYFISHDEMMSDIAANQYLEY 329
TTR+PR E +G Y+F+S +E I ++LE+
Sbjct: 39 TTRAPRPGEVDGVDYFFVSKEEFEEMIENGEFLEW 73
>gnl|CDD|223272 COG0194, Gmk, Guanylate kinase [Nucleotide transport and
metabolism].
Length = 191
Score = 52.5 bits (127), Expect = 3e-08
Identities = 17/50 (34%), Positives = 27/50 (54%), Gaps = 2/50 (4%)
Query: 280 IYSSFSLPFSVYRRDTTRSPRSDEENGRAYYFISHDEMMSDIAANQYLEY 329
+ L FSV TTR PR E +G Y+F++ +E I +++LE+
Sbjct: 24 LLEDDKLRFSV--SATTRKPRPGEVDGVDYFFVTEEEFEELIERDEFLEW 71
>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 = 49.0 bits (118), Expect = 3e-08
Identities = 19/58 (32%), Positives = 30/58 (51%), Gaps = 9/58 (15%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
+ RA ++Y DDD + F+ GDI+ ++ KDD WW+ + G GL P+
Sbjct: 1 YARALYDYEAQDDDELS-------FKKGDIITVLEKDDDGWWEGELNG--GREGLFPA 49
Score = 30.9 bits (71), Expect = 0.092
Identities = 9/29 (31%), Positives = 15/29 (51%), Gaps = 2/29 (6%)
Query: 230 MFQIISKDDHNWWQARKDNVAGSAGLIPS 258
+ ++ KDD WW+ + G GL P+
Sbjct: 23 IITVLEKDDDGWWEGELNG--GREGLFPA 49
>gnl|CDD|212962 cd12029, SH3_DLG3, Src Homology 3 domain of Disks Large homolog 3.
DLG3, also called synapse-associated protein 102
(SAP102), is a scaffolding protein that clusters at
synapses and plays an important role in synaptic
development and plasticity. Mutations in DLG3 cause
midgestational embryonic lethality in mice and may be
associated with nonsyndromic X-linked mental retardation
in humans. It interacts with the NEDD4 (neural precursor
cell-expressed developmentally downregulated 4) family
of ubiquitin ligases and promotes apical tight junction
formation. DLG3 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. DLG3 contains three PDZ 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 = 67
Score = 48.2 bits (114), Expect = 1e-07
Identities = 26/67 (38%), Positives = 38/67 (56%), Gaps = 5/67 (7%)
Query: 66 IFVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSA---GLI 122
++VRA F+Y+ D +P G++F GDIL +I+ D WWQAR G + G+I
Sbjct: 3 LYVRALFDYDRTRDSCLP--SQGLSFSYGDILHVINASDDEWWQARLVTPHGESEQIGVI 60
Query: 123 PSPELQE 129
PS + E
Sbjct: 61 PSKKRVE 67
>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 = 45.3 bits (108), Expect = 7e-07
Identities = 18/56 (32%), Positives = 27/56 (48%), Gaps = 9/56 (16%)
Query: 69 RAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
A ++Y + D + F+ GDI+ ++ K D WW+ R G GLIPS
Sbjct: 1 VALYDYTAREPDELS-------FKKGDIIIVLEKSDDGWWKGRLKG--GKEGLIPS 47
Score = 33.3 bits (77), Expect = 0.010
Identities = 11/29 (37%), Positives = 15/29 (51%), Gaps = 2/29 (6%)
Query: 230 MFQIISKDDHNWWQARKDNVAGSAGLIPS 258
+ ++ K D WW+ R G GLIPS
Sbjct: 21 IIIVLEKSDDGWWKGRLKG--GKEGLIPS 47
>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 = 43.6 bits (103), Expect = 3e-06
Identities = 21/57 (36%), Positives = 31/57 (54%), Gaps = 10/57 (17%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
V A F Y ++D ++FQ GDI+ ++SKDD +WW + + G GL PS
Sbjct: 2 VIALFPYTAQNED-------ELSFQKGDIINVLSKDDPDWW---RGELNGQTGLFPS 48
Score = 29.7 bits (67), Expect = 0.29
Identities = 11/29 (37%), Positives = 17/29 (58%), Gaps = 3/29 (10%)
Query: 230 MFQIISKDDHNWWQARKDNVAGSAGLIPS 258
+ ++SKDD +WW + + G GL PS
Sbjct: 23 IINVLSKDDPDWW---RGELNGQTGLFPS 48
>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 = 43.6 bits (103), Expect = 3e-06
Identities = 23/62 (37%), Positives = 32/62 (51%), Gaps = 10/62 (16%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDH-NWWQARKDNVAGSAGLIPSPE 126
RA + Y+ DD ++F+ G+IL++ D WWQARK N G G+ PS
Sbjct: 2 ARALYPYDASPDDP-----NELSFEKGEILEV--SDTSGKWWQARKSN--GETGICPSNY 52
Query: 127 LQ 128
LQ
Sbjct: 53 LQ 54
Score = 31.2 bits (71), Expect = 0.069
Identities = 14/28 (50%), Positives = 15/28 (53%), Gaps = 3/28 (10%)
Query: 236 KDDH-NWWQARKDNVAGSAGLIPSPELQ 262
D WWQARK N G G+ PS LQ
Sbjct: 29 SDTSGKWWQARKSN--GETGICPSNYLQ 54
>gnl|CDD|212797 cd11863, SH3_CACNB, Src Homology 3 domain of Voltage-dependent
L-type calcium channel subunit beta. Voltage-dependent
calcium channels (Ca(V)s) are multi-protein complexes
that regulate the entry of calcium into cells. They
impact muscle contraction, neuronal migration, hormone
and neurotransmitter release, and the activation of
calcium-dependent signaling pathways. They are composed
of four subunits: alpha1, alpha2delta, beta, and gamma.
The beta subunit is a soluble and intracellular protein
that interacts with the transmembrane alpha1 subunit. It
facilitates the trafficking and proper localization of
the alpha1 subunit to the cellular plasma membrane.
Vertebrates contain four different beta subunits from
distinct genes (beta1-4); each exists as multiple splice
variants. All are expressed in the brain while other
tissues show more specific expression patterns. The beta
subunits show similarity to MAGUK (membrane-associated
guanylate kinase) proteins in that they contain SH3 and
inactive guanylate kinase (GuK) domains; however, they
do not appear to contain a PDZ 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 = 62
Score = 43.0 bits (102), Expect = 6e-06
Identities = 19/58 (32%), Positives = 26/58 (44%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSP 125
VR Y+ DD P ++F+ D L I K +++WW R G IPSP
Sbjct: 3 VRTNVGYDGSLDDDSPVPGYAVSFEAKDFLHIKEKYNNDWWIGRLVKEGCDIGFIPSP 60
Score = 26.9 bits (60), Expect = 3.7
Identities = 10/28 (35%), Positives = 13/28 (46%)
Query: 232 QIISKDDHNWWQARKDNVAGSAGLIPSP 259
I K +++WW R G IPSP
Sbjct: 33 HIKEKYNNDWWIGRLVKEGCDIGFIPSP 60
>gnl|CDD|212974 cd12041, SH3_CACNB1, Src Homology 3 domain of Voltage-dependent
L-type calcium channel subunit beta-1. The beta1
subunit of voltage-dependent calcium channels (Ca(V)s)
is one of four beta subunits present in vertebrates. It
is the only beta subunit, as the beta1a variant,
expressed in skeletal muscle; the beta1b variant is also
widely expressed in other tissues including the heart
and brain. Knockout of the beta1 gene in mice results in
embryonic lethality, demonstrating its importance in
development. Ca(V)s are multi-protein complexes that
regulate the entry of calcium into cells. They impact
muscle contraction, neuronal migration, hormone and
neurotransmitter release, and the activation of
calcium-dependent signaling pathways. They are composed
of four subunits: alpha1, alpha2delta, beta, and gamma.
The beta subunit is a soluble and intracellular protein
that interacts with the transmembrane alpha1 subunit. It
facilitates the trafficking and proper localization of
the alpha1 subunit to the cellular plasma membrane.
Vertebrates contain four different beta subunits from
distinct genes (beta1-4); each exists as multiple splice
variants. All are expressed in the brain while other
tissues show more specific expression patterns. The beta
subunits show similarity to MAGUK (membrane-associated
guanylate kinase) proteins in that they contain SH3 and
inactive guanylate kinase (GuK) domains; however, they
do not appear to contain a PDZ 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 = 68
Score = 43.0 bits (101), Expect = 7e-06
Identities = 21/58 (36%), Positives = 27/58 (46%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSP 125
VR YNP D +P I+F+ D L I K +++WW R G IPSP
Sbjct: 7 VRTNVGYNPSPGDDVPVQGMAISFEPKDFLHIKEKYNNDWWIGRLVKEGCEVGFIPSP 64
>gnl|CDD|212706 cd11772, SH3_OSTF1, Src Homology 3 domain of metazoan osteoclast
stimulating factor 1. OSTF1, also named OSF or SH3P2,
is a signaling protein containing SH3 and ankyrin-repeat
domains. It acts through a Src-related pathway to
enhance the formation of osteoclasts and bone
resorption. It also acts as a negative regulator of cell
motility. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 41.5 bits (98), Expect = 2e-05
Identities = 21/58 (36%), Positives = 28/58 (48%), Gaps = 10/58 (17%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
RA ++Y D ++F+ GD+L I K D NWW+A G GLIPS
Sbjct: 1 VFRALYDYEAQHPD-------ELSFEEGDLLYISDKSDPNWWKAT---CGGKTGLIPS 48
Score = 29.6 bits (67), Expect = 0.28
Identities = 13/26 (50%), Positives = 14/26 (53%), Gaps = 3/26 (11%)
Query: 233 IISKDDHNWWQARKDNVAGSAGLIPS 258
I K D NWW+A G GLIPS
Sbjct: 26 ISDKSDPNWWKAT---CGGKTGLIPS 48
>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 = 41.0 bits (97), Expect = 2e-05
Identities = 22/59 (37%), Positives = 29/59 (49%), Gaps = 10/59 (16%)
Query: 67 FVRAQFNYNPL-DDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
A ++Y DDDL +F+ GD LQI+ D +WW AR + G G IPS
Sbjct: 1 IYVALYDYEARTDDDL--------SFKKGDRLQILDDSDGDWWLARHLS-TGKEGYIPS 50
Score = 27.9 bits (63), Expect = 1.2
Identities = 12/28 (42%), Positives = 15/28 (53%), Gaps = 1/28 (3%)
Query: 231 FQIISKDDHNWWQARKDNVAGSAGLIPS 258
QI+ D +WW AR + G G IPS
Sbjct: 24 LQILDDSDGDWWLARHLS-TGKEGYIPS 50
>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 = 40.6 bits (95), Expect = 3e-05
Identities = 17/57 (29%), Positives = 33/57 (57%), Gaps = 10/57 (17%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIP 123
FV+AQ++++ D + ++F+ GDI++++ D NWW+ R ++G G P
Sbjct: 1 FVQAQYDFSAED-------PSQLSFRRGDIIEVLDCPDPNWWRGR---ISGRVGFFP 47
>gnl|CDD|212973 cd12040, SH3_CACNB2, Src Homology 3 domain of Voltage-dependent
L-type calcium channel subunit beta2. The beta2 subunit
of voltage-dependent calcium channels (Ca(V)s) is one of
four beta subunits present in vertebrates. It is
expressed in the heart and is present in specific
neuronal cells including cerebellar Purkinje cells,
hippocampal pyramidal neurons, and photoreceptors.
Knockout of the beta2 gene in mice results in embryonic
lethality, demonstrating its importance in development.
Ca(V)s are multi-protein complexes that regulate the
entry of calcium into cells. They impact muscle
contraction, neuronal migration, hormone and
neurotransmitter release, and the activation of
calcium-dependent signaling pathways. They are composed
of four subunits: alpha1, alpha2delta, beta, and gamma.
The beta subunit is a soluble and intracellular protein
that interacts with the transmembrane alpha1 subunit. It
facilitates the trafficking and proper localization of
the alpha1 subunit to the cellular plasma membrane.
Vertebrates contain four different beta subunits from
distinct genes (beta1-4); each exists as multiple splice
variants. All are expressed in the brain while other
tissues show more specific expression patterns. The beta
subunits show similarity to MAGUK (membrane-associated
guanylate kinase) proteins in that they contain SH3 and
inactive guanylate kinase (GuK) domains; however, they
do not appear to contain a PDZ 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 = 69
Score = 40.8 bits (95), Expect = 4e-05
Identities = 18/58 (31%), Positives = 27/58 (46%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSP 125
VR Y+ +D +P I+F+ D L + K +++WW R G IPSP
Sbjct: 8 VRTNVGYSAAHEDDVPVPGMAISFEAKDFLHVKEKFNNDWWIGRLVKEGCEIGFIPSP 65
>gnl|CDD|212963 cd12030, SH3_DLG4, Src Homology 3 domain of Disks Large homolog 4.
DLG4, also called postsynaptic density-95 (PSD95) or
synapse-associated protein 90 (SAP90), is a scaffolding
protein that clusters at synapses and plays an important
role in synaptic development and plasticity. It is
responsible for the membrane clustering and retention of
many transporters and receptors such as potassium
channels and PMCA4b, a P-type ion transport ATPase,
among others. DLG4 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. DLG4 contains three PDZ domains. The SH3
domain of DLG4 binds and clusters the kainate subgroup
of glutamate receptors via two proline-rich sequences in
their C-terminal tail. It also binds AKAP79/150
(A-kinase anchoring protein). SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 66
Score = 40.7 bits (95), Expect = 5e-05
Identities = 23/64 (35%), Positives = 35/64 (54%), Gaps = 11/64 (17%)
Query: 67 FVRAQFNYNPLDDDLIPC---AQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSA---G 120
++RA F+Y+ D C +QA ++F+ GD+L +I D WWQAR+ + G
Sbjct: 3 YIRALFDYDKTKD----CGFLSQA-LSFRFGDVLHVIDAGDEEWWQARRVHSDSETEEIG 57
Query: 121 LIPS 124
IPS
Sbjct: 58 FIPS 61
Score = 28.7 bits (64), Expect = 0.76
Identities = 11/32 (34%), Positives = 15/32 (46%), Gaps = 3/32 (9%)
Query: 230 MFQIISKDDHNWWQARKDNVAGSA---GLIPS 258
+ +I D WWQAR+ + G IPS
Sbjct: 30 VLHVIDAGDEEWWQARRVHSDSETEEIGFIPS 61
>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 = 39.6 bits (93), Expect = 9e-05
Identities = 17/43 (39%), Positives = 28/43 (65%), Gaps = 4/43 (9%)
Query: 89 IAFQIGDILQIISK--DDHNWWQARKDNVAGSAGLIPSPELQE 129
++F+ G+ L+II K DD +WW+AR N G+ GL+P ++
Sbjct: 16 LSFEKGERLEIIEKPEDDPDWWKAR--NALGTTGLVPRNYVEV 56
Score = 31.9 bits (73), Expect = 0.046
Identities = 14/36 (38%), Positives = 21/36 (58%), Gaps = 4/36 (11%)
Query: 230 MFQIISK--DDHNWWQARKDNVAGSAGLIPSPELQE 263
+II K DD +WW+AR N G+ GL+P ++
Sbjct: 23 RLEIIEKPEDDPDWWKAR--NALGTTGLVPRNYVEV 56
>gnl|CDD|212975 cd12042, SH3_CACNB3, Src Homology 3 domain of Voltage-dependent
L-type calcium channel subunit beta3. The beta3 subunit
of voltage-dependent calcium channels (Ca(V)s) is one of
four beta subunits present in vertebrates. It is the
main beta subunit present in smooth muscles and is
strongly expressed in the brain; it is predominant in
the olfactory bulb, cortex, and hippocampus. It may play
a role in regulating the NMDAR (N-methyl-d-aspartate
receptor) activity in the hippocampus and thus,
activity-dependent synaptic plasticity and cognitive
behaviors. Ca(V)s are multi-protein complexes that
regulate the entry of calcium into cells. They impact
muscle contraction, neuronal migration, hormone and
neurotransmitter release, and the activation of
calcium-dependent signaling pathways. They are composed
of four subunits: alpha1, alpha2delta, beta, and gamma.
The beta subunit is a soluble and intracellular protein
that interacts with the transmembrane alpha1 subunit. It
facilitates the trafficking and proper localization of
the alpha1 subunit to the cellular plasma membrane.
Vertebrates contain four different beta subunits from
distinct genes (beta1-4); each exists as multiple splice
variants. All are expressed in the brain while other
tissues show more specific expression patterns. The beta
subunits show similarity to MAGUK (membrane-associated
guanylate kinase) proteins in that they contain SH3 and
inactive guanylate kinase (GuK) domains; however, they
do not appear to contain a PDZ 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 = 68
Score = 39.6 bits (92), Expect = 1e-04
Identities = 21/62 (33%), Positives = 27/62 (43%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPEL 127
VR +Y D+ P A I F+ D L I K ++WW R G IPSP+
Sbjct: 7 VRTNVSYCGALDEECPVQGAAINFEAKDFLHIKEKYSNDWWIGRLVKEGGDIAFIPSPQR 66
Query: 128 QE 129
E
Sbjct: 67 LE 68
>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 = 39.4 bits (92), Expect = 1e-04
Identities = 15/58 (25%), Positives = 29/58 (50%), Gaps = 10/58 (17%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
+V+A F+++P +D + F+ GD ++++ D NWW+ G G+ P
Sbjct: 1 YVQALFDFDPQED-------GELGFRRGDFIEVMDNSDPNWWKGA---CHGQTGMFPR 48
>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 = 38.1 bits (89), Expect = 2e-04
Identities = 14/60 (23%), Positives = 28/60 (46%), Gaps = 10/60 (16%)
Query: 69 RAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPELQ 128
++Y +DD + ++ GD++ +I K + WW ++ G GL+P L+
Sbjct: 3 SVLYDYTAQEDDELSISK-------GDVVAVIEKGEDGWWTVERN---GQKGLVPGTYLE 52
>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 = 38.4 bits (90), Expect = 2e-04
Identities = 19/55 (34%), Positives = 31/55 (56%), Gaps = 10/55 (18%)
Query: 70 AQFNYNPLDDDLIPCAQAGIAFQIGDILQII-SKDDHNWWQARKDNVAGSAGLIP 123
A++N+N ++ +P F+ GDIL I+ D NW++A+ N G G+IP
Sbjct: 6 AKYNFNGASEEDLP-------FKKGDILTIVAVTKDPNWYKAK--NKDGREGMIP 51
Score = 29.2 bits (66), Expect = 0.45
Identities = 9/29 (31%), Positives = 16/29 (55%), Gaps = 2/29 (6%)
Query: 229 VMFQIISKDDHNWWQARKDNVAGSAGLIP 257
++ + D NW++A+ N G G+IP
Sbjct: 25 ILTIVAVTKDPNWYKAK--NKDGREGMIP 51
>gnl|CDD|212816 cd11883, SH3_Sdc25, Src Homology 3 domain of Sdc25/Cdc25 guanine
nucleotide exchange factors. This subfamily is composed
of the Saccharomyces cerevisiae guanine nucleotide
exchange factors (GEFs) Sdc25 and Cdc25, and similar
proteins. These GEFs regulate Ras by stimulating the
GDP/GTP exchange on Ras. Cdc25 is involved in the
Ras/PKA pathway that plays an important role in the
regulation of metabolism, stress responses, and
proliferation, depending on available nutrients and
conditions. Proteins in this subfamily contain an
N-terminal SH3 domain as well as REM (Ras exchanger
motif) and RasGEF domains at the C-terminus. SH3 domains
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs; they play a
role in the regulation of enzymes by intramolecular
interactions, changing the subcellular localization of
signal pathway components and mediate multiprotein
complex assemblies.
Length = 55
Score = 38.0 bits (89), Expect = 3e-04
Identities = 11/42 (26%), Positives = 21/42 (50%), Gaps = 7/42 (16%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWW 108
V A +++ P + + F+ GDI+ +++KD WW
Sbjct: 1 VVVALYDFTPKSKNQLS-------FKAGDIIYVLNKDPSGWW 35
>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 = 37.8 bits (88), Expect = 4e-04
Identities = 17/57 (29%), Positives = 27/57 (47%), Gaps = 10/57 (17%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
+A + Y+ D D ++F GDI++I+ +D WW R + G GL P
Sbjct: 2 CKALYAYDAQDTD-------ELSFNEGDIIEILKEDPSGWWTGR---LRGKEGLFPG 48
>gnl|CDD|212976 cd12043, SH3_CACNB4, Src Homology 3 domain of Voltage-dependent
L-type calcium channel subunit beta4. The beta4 subunit
of voltage-dependent calcium channels (Ca(V)s) is one of
four beta subunits present in vertebrates. It is the
only beta subunit expressed in the cochlea and is highly
expressed in the brain, predominantly in the cerebellum.
Ca(V)s are multi-protein complexes that regulate the
entry of calcium into cells. They impact muscle
contraction, neuronal migration, hormone and
neurotransmitter release, and the activation of
calcium-dependent signaling pathways. They are composed
of four subunits: alpha1, alpha2delta, beta, and gamma.
The beta subunit is a soluble and intracellular protein
that interacts with the transmembrane alpha1 subunit. It
facilitates the trafficking and proper localization of
the alpha1 subunit to the cellular plasma membrane.
Vertebrates contain four different beta subunits from
distinct genes (beta1-4); each exists as multiple splice
variants. All are expressed in the brain while other
tissues show more specific expression patterns. The beta
subunits show similarity to MAGUK (membrane-associated
guanylate kinase) proteins in that they contain SH3 and
inactive guanylate kinase (GuK) domains; however, they
do not appear to contain a PDZ 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 = 68
Score = 38.0 bits (88), Expect = 4e-04
Identities = 21/59 (35%), Positives = 28/59 (47%), Gaps = 2/59 (3%)
Query: 68 VRAQFNY-NPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSP 125
VR +Y LD+D +P I+F D L I K +++WW R G IPSP
Sbjct: 7 VRTNVSYCGALDED-VPVPGTAISFDAKDFLHIKEKYNNDWWIGRLVKEGCEIGFIPSP 64
>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 = 37.2 bits (87), Expect = 5e-04
Identities = 12/51 (23%), Positives = 24/51 (47%), Gaps = 7/51 (13%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAG 117
V+A +++NP + + F+ GDI+ ++ D +WW+ G
Sbjct: 1 RVQALYDFNPQEPG-------ELEFRRGDIITVLDSSDPDWWKGELRGRVG 44
>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 = 37.0 bits (86), Expect = 6e-04
Identities = 15/61 (24%), Positives = 28/61 (45%), Gaps = 11/61 (18%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSA----GLIP 123
+A ++Y P +D + Q DIL ++ K D +WW+ + + GL+P
Sbjct: 2 YKALYDYEPQTED-------ELTIQEDDILYLLEKSDDDWWKVKLKVNSSDDDEPVGLVP 54
Query: 124 S 124
+
Sbjct: 55 A 55
Score = 26.6 bits (59), Expect = 3.2
Identities = 7/30 (23%), Positives = 15/30 (50%), Gaps = 4/30 (13%)
Query: 233 IISKDDHNWWQARKDNVAGSA----GLIPS 258
++ K D +WW+ + + GL+P+
Sbjct: 26 LLEKSDDDWWKVKLKVNSSDDDEPVGLVPA 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 = 36.9 bits (86), Expect = 7e-04
Identities = 18/52 (34%), Positives = 28/52 (53%), Gaps = 10/52 (19%)
Query: 78 DDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPELQE 129
+ DL +F+ G++L+IISK WW A +N G+ GL+P L+
Sbjct: 13 EGDL--------SFKKGEVLRIISKRADGWWLA--ENSKGNRGLVPKTYLKV 54
Score = 27.7 bits (62), Expect = 1.6
Identities = 13/31 (41%), Positives = 17/31 (54%), Gaps = 2/31 (6%)
Query: 233 IISKDDHNWWQARKDNVAGSAGLIPSPELQE 263
IISK WW A +N G+ GL+P L+
Sbjct: 26 IISKRADGWWLA--ENSKGNRGLVPKTYLKV 54
>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 = 36.2 bits (84), Expect = 0.001
Identities = 18/58 (31%), Positives = 27/58 (46%), Gaps = 12/58 (20%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKD--DHNWWQARKDNVAGSAGLIP 123
R F+Y ++D + + GDI+ I+SKD D WW K + G G+ P
Sbjct: 2 ARVLFDYEAENEDEL-------TLREGDIVTILSKDCEDKGWW---KGELNGKRGVFP 49
>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 = 35.7 bits (82), Expect = 0.002
Identities = 17/57 (29%), Positives = 28/57 (49%), Gaps = 10/57 (17%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
V ++Y +DD + F G I+ +++K+D +WW K + G GL PS
Sbjct: 3 VIGMYDYTAQNDDELA-------FSKGQIINVLNKEDPDWW---KGELNGQVGLFPS 49
Score = 28.0 bits (62), Expect = 1.1
Identities = 10/29 (34%), Positives = 17/29 (58%), Gaps = 3/29 (10%)
Query: 230 MFQIISKDDHNWWQARKDNVAGSAGLIPS 258
+ +++K+D +WW K + G GL PS
Sbjct: 24 IINVLNKEDPDWW---KGELNGQVGLFPS 49
>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 = 35.4 bits (81), Expect = 0.002
Identities = 16/62 (25%), Positives = 30/62 (48%), Gaps = 10/62 (16%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPEL 127
VRA+FN+ ++D ++F GD++ + ++ WW+ G G PS +
Sbjct: 2 VRAKFNFQQTNED-------ELSFSKGDVIHVTRVEEGGWWEG---THNGRTGWFPSNYV 51
Query: 128 QE 129
+E
Sbjct: 52 RE 53
>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 = 35.6 bits (82), Expect = 0.003
Identities = 18/59 (30%), Positives = 30/59 (50%), Gaps = 12/59 (20%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKD--DHNWWQARKDNVAGSAGLIP 123
+ +A F+Y ++D + F+ G+I+ IISKD + WW K + G G+ P
Sbjct: 3 YCKALFHYEGTNED-------ELDFKEGEIILIISKDTGEPGWW---KGELNGKEGVFP 51
>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 = 35.3 bits (82), Expect = 0.003
Identities = 13/45 (28%), Positives = 23/45 (51%), Gaps = 7/45 (15%)
Query: 73 NYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAG 117
+Y DD I+ Q G++++++ K+D WW RK + G
Sbjct: 7 DYEAQGDD-------EISLQEGEVVEVLEKNDSGWWYVRKGDKEG 44
>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 = 35.0 bits (81), Expect = 0.003
Identities = 14/37 (37%), Positives = 24/37 (64%), Gaps = 4/37 (10%)
Query: 89 IAFQIGDILQIISKD-DHNWWQARKDNVAGSAGLIPS 124
++F+ G IL++++ + D NW++A D G GLIP
Sbjct: 16 LSFKKGSILKVLNMEDDPNWYKAELD---GKEGLIPK 49
>gnl|CDD|215414 PLN02772, PLN02772, guanylate kinase.
Length = 398
Score = 38.7 bits (90), Expect = 0.003
Identities = 20/54 (37%), Positives = 27/54 (50%), Gaps = 10/54 (18%)
Query: 288 FSVYRRDTTRSPRSDEENGRAYYFISHDEMMSDIAANQYLE--------YGKSI 333
FSV TTR+PR E++G Y+F M +I ++LE YG SI
Sbjct: 165 FSV--SHTTRAPREMEKDGVHYHFTERSVMEKEIKDGKFLEFASVHGNLYGTSI 216
>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 = 35.1 bits (81), Expect = 0.003
Identities = 18/57 (31%), Positives = 29/57 (50%), Gaps = 12/57 (21%)
Query: 69 RAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISK--DDHNWWQARKDNVAGSAGLIP 123
R F+YNP+ D +A + GD++++ISK +D WW+ + G G P
Sbjct: 3 RVLFDYNPVAPD-------ELALKKGDVIEVISKETEDEGWWEGE---LNGRRGFFP 49
>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 = 35.0 bits (80), Expect = 0.004
Identities = 16/68 (23%), Positives = 34/68 (50%), Gaps = 10/68 (14%)
Query: 65 QIFVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
Q+ V+A+FN+ ++D ++ GDI+ + ++ WW+ + G G PS
Sbjct: 1 QLVVKARFNFKQTNED-------ELSVCKGDIIYVTRVEEGGWWEG---TLNGKTGWFPS 50
Query: 125 PELQEWRT 132
++E ++
Sbjct: 51 NYVREIKS 58
>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 = 34.6 bits (80), Expect = 0.005
Identities = 12/56 (21%), Positives = 29/56 (51%), Gaps = 10/56 (17%)
Query: 69 RAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
+ F+Y P ++D + ++GD ++++ + + WW+ + + G G+ PS
Sbjct: 3 KVLFSYTPQNED-------ELELKVGDTIEVLGEVEEGWWEGKLN---GKVGVFPS 48
>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 = 34.6 bits (80), Expect = 0.005
Identities = 15/63 (23%), Positives = 31/63 (49%), Gaps = 3/63 (4%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQII-SKDDHNWWQARKDNVAGSAGLIPSPE 126
+ A ++YNP + ++F GD++++ D+ ++ + G GL+PS
Sbjct: 2 MVALYDYNPETMSPNDDPEEELSFHAGDVVRVYGPMDEDGFYYG--ELEGGRKGLVPSNF 59
Query: 127 LQE 129
+QE
Sbjct: 60 VQE 62
Score = 31.1 bits (71), Expect = 0.11
Identities = 11/46 (23%), Positives = 23/46 (50%), Gaps = 7/46 (15%)
Query: 35 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIFVRAQFNYNPLDDD 80
+ A ++YNP + ++F GD++++ Y P+D+D
Sbjct: 2 MVALYDYNPETMSPNDDPEEELSFHAGDVVRV-------YGPMDED 40
>gnl|CDD|212800 cd11866, SH3_SKAP1-like, Src Homology 3 domain of Src
Kinase-Associated Phosphoprotein 1 and similar proteins.
This subfamily is composed of SKAP1, SKAP2, and similar
proteins. SKAP1 and SKAP2 are immune cell-specific
adaptor proteins that play roles in T- and B-cell
adhesion, respectively, and are thus important in the
migration of T- and B-cells to sites of inflammation and
for movement during T-cell conjugation with
antigen-presenting cells. Both SKAP1 and SKAP2 bind to
ADAP (adhesion and degranulation-promoting adaptor
protein), among many other binding partners. They
contain a pleckstrin homology (PH) domain, a C-terminal
SH3 domain, and several tyrosine phosphorylation sites.
The SH3 domain of SKAP1 is necessary for its ability to
regulate T-cell conjugation with antigen-presenting
cells and the formation of LFA-1 clusters. SKAP1 binds
primarily to a proline-rich region of ADAP through its
SH3 domain; its degradation is regulated by ADAP. A
secondary interaction occurs via the ADAP SH3 domain and
the RKxxYxxY motif in SKAP1. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 34.3 bits (79), Expect = 0.005
Identities = 14/37 (37%), Positives = 21/37 (56%), Gaps = 5/37 (13%)
Query: 89 IAFQIGDILQIISK--DDHNWWQARKDNVAGSAGLIP 123
++F+ GD++ IISK D WW + G GL+P
Sbjct: 16 LSFKRGDLIYIISKEYDSFGWWVGELN---GKVGLVP 49
>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 = 34.4 bits (79), Expect = 0.005
Identities = 16/57 (28%), Positives = 27/57 (47%), Gaps = 9/57 (15%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
V A ++Y P++ + + G+ I+ + + WW+AR N G G IPS
Sbjct: 3 VVALYDYTPMNAQDLQ-------LRKGEEYVILEESNLPWWRARDKN--GREGYIPS 50
Score = 29.8 bits (67), Expect = 0.22
Identities = 11/26 (42%), Positives = 15/26 (57%), Gaps = 2/26 (7%)
Query: 233 IISKDDHNWWQARKDNVAGSAGLIPS 258
I+ + + WW+AR N G G IPS
Sbjct: 27 ILEESNLPWWRARDKN--GREGYIPS 50
>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 = 34.6 bits (79), Expect = 0.006
Identities = 14/36 (38%), Positives = 22/36 (61%), Gaps = 1/36 (2%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
++F+ G+ QII+ + +WW+AR G G IPS
Sbjct: 17 LSFKKGERFQIINNTEGDWWEARSIA-TGKNGYIPS 51
Score = 31.5 bits (71), Expect = 0.072
Identities = 13/28 (46%), Positives = 17/28 (60%), Gaps = 1/28 (3%)
Query: 231 FQIISKDDHNWWQARKDNVAGSAGLIPS 258
FQII+ + +WW+AR G G IPS
Sbjct: 25 FQIINNTEGDWWEARSIA-TGKNGYIPS 51
>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 = 34.2 bits (79), Expect = 0.006
Identities = 17/56 (30%), Positives = 25/56 (44%), Gaps = 9/56 (16%)
Query: 69 RAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
+A ++Y +D+ I F GDI+ I + D WW N G GL P+
Sbjct: 3 KALYDYQAAEDNEIS-------FVEGDIITQIEQIDEGWWLGV--NAKGQKGLFPA 49
>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 = 34.2 bits (79), Expect = 0.007
Identities = 12/45 (26%), Positives = 24/45 (53%), Gaps = 4/45 (8%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQAR 111
+A +++ D+D C + F+ GD++ +I + D NW + R
Sbjct: 1 QCKALYDFEMKDEDEKDC----LTFKKGDVITVIRRVDENWAEGR 41
>gnl|CDD|173199 PRK14737, gmk, guanylate kinase; Provisional.
Length = 186
Score = 36.5 bits (84), Expect = 0.008
Identities = 14/35 (40%), Positives = 24/35 (68%)
Query: 295 TTRSPRSDEENGRAYYFISHDEMMSDIAANQYLEY 329
TTR+PR +E G+ Y+F++ +E IA ++LE+
Sbjct: 38 TTRAPRPGDEEGKTYFFLTIEEFKKGIADGEFLEW 72
>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 = 33.8 bits (77), Expect = 0.009
Identities = 14/61 (22%), Positives = 32/61 (52%), Gaps = 10/61 (16%)
Query: 69 RAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPELQ 128
+ F+Y P ++D + ++GDI++++ + + WW+ + G G+ PS ++
Sbjct: 3 QVAFSYLPQNED-------ELELKVGDIIEVVGEVEEGWWEGV---LNGKTGMFPSNFIK 52
Query: 129 E 129
E
Sbjct: 53 E 53
>gnl|CDD|212757 cd11823, SH3_Nostrin, Src homology 3 domain of Nitric Oxide
Synthase TRaffic INducer. Nostrin is expressed in
endothelial and epithelial cells and is involved in the
regulation, trafficking and targeting of endothelial NOS
(eNOS). It facilitates the endocytosis of eNOS by
coordinating the functions of dynamin and the
Wiskott-Aldrich syndrome protein (WASP). Increased
expression of Nostrin may be correlated to preeclampsia.
Nostrin contains an N-terminal F-BAR domain and a
C-terminal SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 33.5 bits (77), Expect = 0.011
Identities = 16/62 (25%), Positives = 30/62 (48%), Gaps = 12/62 (19%)
Query: 69 RAQFNYNP-LDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPEL 127
+A ++Y +D+L + Q GDI+++ K D WW + G G+ P+ +
Sbjct: 3 KALYSYTANREDEL--------SLQPGDIIEVHEKQDDGWWLG---ELNGKKGIFPATYV 51
Query: 128 QE 129
+E
Sbjct: 52 EE 53
>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 = 33.1 bits (75), Expect = 0.019
Identities = 14/35 (40%), Positives = 22/35 (62%), Gaps = 4/35 (11%)
Query: 91 FQIGDILQIISK--DDHNWWQARKDNVAGSAGLIP 123
F+ G+++ +I K +D WW+ RK N G GL+P
Sbjct: 19 FEKGEVMDVIEKPENDPEWWKCRKAN--GQVGLVP 51
>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 = 32.9 bits (75), Expect = 0.019
Identities = 10/32 (31%), Positives = 21/32 (65%)
Query: 86 QAGIAFQIGDILQIISKDDHNWWQARKDNVAG 117
Q G++F+ G++++++ D WW+ KD + G
Sbjct: 14 QQGLSFEAGELIRVLQAPDGGWWEGEKDGLRG 45
>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 = 33.0 bits (75), Expect = 0.019
Identities = 17/57 (29%), Positives = 27/57 (47%), Gaps = 10/57 (17%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
VRA +++ +D+ + F+ GDI+ I+ D NWW+ GL PS
Sbjct: 3 VRAIYDFEAAEDN-------ELTFKAGDIITILDDSDPNWWKGETPQ---GTGLFPS 49
>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 = 32.9 bits (75), Expect = 0.020
Identities = 13/35 (37%), Positives = 20/35 (57%), Gaps = 3/35 (8%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIP 123
++F+ GD+L + SK +WW + G GLIP
Sbjct: 18 LSFKRGDVLLLHSKASSDWW---RGEHNGMRGLIP 49
>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 = 32.7 bits (74), Expect = 0.022
Identities = 12/36 (33%), Positives = 21/36 (58%), Gaps = 1/36 (2%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
++F G+ QI++ + +WW+AR + G IPS
Sbjct: 17 LSFHKGEKFQILNSSEGDWWEARSLTTGET-GYIPS 51
Score = 29.6 bits (66), Expect = 0.27
Identities = 11/28 (39%), Positives = 17/28 (60%), Gaps = 1/28 (3%)
Query: 231 FQIISKDDHNWWQARKDNVAGSAGLIPS 258
FQI++ + +WW+AR + G IPS
Sbjct: 25 FQILNSSEGDWWEARSLTTGET-GYIPS 51
>gnl|CDD|212810 cd11877, SH3_PIX, Src Homology 3 domain of Pak Interactive eXchange
factors. PIX proteins are Rho guanine nucleotide
exchange factors (GEFs), which activate small GTPases by
exchanging bound GDP for free GTP. They act as GEFs for
both Cdc42 and Rac 1, and have been implicated in cell
motility, adhesion, neurite outgrowth, and cell
polarity. Vertebrates contain two proteins from the PIX
subfamily, alpha-PIX and beta-PIX. Alpha-PIX, also
called ARHGEF6, is localized in dendritic spines where
it regulates spine morphogenesis. Mutations in the
ARHGEF6 gene cause X-linked intellectual disability in
humans. Beta-PIX play roles in regulating neuroendocrine
exocytosis, focal adhesion maturation, cell migration,
synaptic vesicle localization, and insulin secretion.
PIX proteins contain an N-terminal SH3 domain followed
by RhoGEF (also called Dbl-homologous or DH) and
Pleckstrin Homology (PH) domains, and a C-terminal
leucine-zipper domain for dimerization. The SH3 domain
of PIX binds to an atypical PxxxPR motif in
p21-activated kinases (PAKs) with high affinity. The
binding of PAKs to PIX facilitate the localization of
PAKs to focal complexes and also localizes PAKs to PIX
targets Cdc43 and Rac, leading to the activation of
PAKs. SH3 domains are protein interaction domains that
bind to proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 32.7 bits (75), Expect = 0.023
Identities = 16/57 (28%), Positives = 27/57 (47%), Gaps = 10/57 (17%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
VRA+FN+ ++D ++F GDI+ + + WW+ + G G PS
Sbjct: 2 VRAKFNFEGTNED-------ELSFDKGDIITVTQVVEGGWWEG---TLNGKTGWFPS 48
>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 = 32.2 bits (74), Expect = 0.028
Identities = 15/58 (25%), Positives = 29/58 (50%), Gaps = 11/58 (18%)
Query: 68 VRAQFNYNPLDD-DLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
V A +++ P++ DL + G+ ++ + +WW+AR + G+ G IPS
Sbjct: 2 VVALYDFQPIEPGDL--------PLEKGEEYVVLDDSNEHWWRAR--DKNGNEGYIPS 49
Score = 29.2 bits (66), Expect = 0.44
Identities = 9/26 (34%), Positives = 16/26 (61%), Gaps = 2/26 (7%)
Query: 233 IISKDDHNWWQARKDNVAGSAGLIPS 258
++ + +WW+AR + G+ G IPS
Sbjct: 26 VLDDSNEHWWRAR--DKNGNEGYIPS 49
>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 = 32.3 bits (74), Expect = 0.034
Identities = 15/50 (30%), Positives = 25/50 (50%), Gaps = 7/50 (14%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAG 117
V A ++Y DD ++FQ GDI+ + K+D W++ + V G
Sbjct: 2 VVALYDYTADKDD-------ELSFQEGDIIYVTKKNDDGWYEGVLNGVTG 44
>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 = 32.3 bits (73), Expect = 0.036
Identities = 13/36 (36%), Positives = 22/36 (61%), Gaps = 3/36 (8%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
++F G ++ +++KDD +WWQ + G GL PS
Sbjct: 17 LSFSKGQLINVLNKDDPDWWQGE---INGVTGLFPS 49
Score = 27.6 bits (61), Expect = 1.3
Identities = 11/29 (37%), Positives = 17/29 (58%), Gaps = 3/29 (10%)
Query: 230 MFQIISKDDHNWWQARKDNVAGSAGLIPS 258
+ +++KDD +WWQ + G GL PS
Sbjct: 24 LINVLNKDDPDWWQGE---INGVTGLFPS 49
>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 = 32.0 bits (73), Expect = 0.039
Identities = 18/59 (30%), Positives = 29/59 (49%), Gaps = 11/59 (18%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIIS-KDDHNWWQARKDNVAGSAGLIPS 124
VRA ++Y + D ++F+ GDIL + +D+ W + R D G GL P+
Sbjct: 1 PVRALYDYEGQESD-------ELSFKAGDILTKLEEEDEQGWCKGRLD---GRVGLYPA 49
>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 = 31.8 bits (72), Expect = 0.043
Identities = 13/62 (20%), Positives = 32/62 (51%), Gaps = 11/62 (17%)
Query: 69 RAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHN-WWQARKDNVAGSAGLIPSPEL 127
+A++++ D ++ ++ + GDI++I++K WW + + G G P+ +
Sbjct: 3 KARYDFCARD-------RSELSLKEGDIIKILNKKGQQGWW---RGEIYGRVGWFPANYV 52
Query: 128 QE 129
+E
Sbjct: 53 EE 54
>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 = 31.6 bits (72), Expect = 0.047
Identities = 18/57 (31%), Positives = 27/57 (47%), Gaps = 9/57 (15%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
RA ++Y DD I+F GDI+ I + D WW+ + G+ GL P+
Sbjct: 2 ARALYDYQAADDT-------EISFDPGDIITDIEQIDEGWWRGTGPD--GTYGLFPA 49
>gnl|CDD|212765 cd11831, SH3_VAV_1, First 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 = 62
Score = 31.8 bits (72), Expect = 0.050
Identities = 13/36 (36%), Positives = 20/36 (55%), Gaps = 4/36 (11%)
Query: 91 FQIGDILQIISKD-DHNWWQARKDNVA-GSAGLIPS 124
Q GD+++++ D + WW+ R NVA G PS
Sbjct: 24 LQTGDVVELLKGDAESPWWEGR--NVATREVGYFPS 57
>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 = 31.4 bits (71), Expect = 0.056
Identities = 17/59 (28%), Positives = 26/59 (44%), Gaps = 10/59 (16%)
Query: 71 QFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPELQE 129
+F+Y +D + +GDI+ I KDD WW+ G GL P ++E
Sbjct: 5 EFDYKAQHED-------ELTITVGDIITKIKKDDGGWWEGEIK---GRRGLFPDNFVRE 53
>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 = 31.3 bits (71), Expect = 0.058
Identities = 16/55 (29%), Positives = 30/55 (54%), Gaps = 11/55 (20%)
Query: 69 RAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIP 123
R +F++ +D ++F+ GD+L+I+S DD W++A + G G +P
Sbjct: 3 RGKFDFTASGED-------ELSFKKGDVLKILSSDD-IWFKAE---LNGEEGYVP 46
>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 = 31.5 bits (72), Expect = 0.059
Identities = 13/40 (32%), Positives = 23/40 (57%), Gaps = 3/40 (7%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPELQ 128
++ G +++++ K D+ WW R + G AG +PS LQ
Sbjct: 16 LSVPAGVVVEVLQKSDNGWWLIRYN---GRAGYVPSMYLQ 52
Score = 26.9 bits (60), Expect = 2.6
Identities = 14/40 (35%), Positives = 24/40 (60%), Gaps = 4/40 (10%)
Query: 224 ITVCS-VMFQIISKDDHNWWQARKDNVAGSAGLIPSPELQ 262
++V + V+ +++ K D+ WW R + G AG +PS LQ
Sbjct: 16 LSVPAGVVVEVLQKSDNGWWLIRYN---GRAGYVPSMYLQ 52
>gnl|CDD|212762 cd11828, SH3_ARHGEF9_like, Src homology 3 domain of ARHGEF9-like
Rho guanine nucleotide exchange factors. Members of
this family contain a SH3 domain followed by RhoGEF
(also called Dbl-homologous or DH) and Pleckstrin
Homology (PH) domains. They include the Rho guanine
nucleotide exchange factors ARHGEF9, ASEF (also called
ARHGEF4), ASEF2, and similar proteins. GEFs activate
small GTPases by exchanging bound GDP for free GTP.
ARHGEF9 specifically activates Cdc42, while both ASEF
and ASEF2 can activate Rac1 and Cdc42. ARHGEF9 is highly
expressed in the brain and it interacts with gephyrin, a
postsynaptic protein associated with GABA and glycine
receptors. ASEF plays a role in angiogenesis and cell
migration. ASEF2 is important in cell migration and
adhesion dynamics. ASEF exists in an autoinhibited form
and is activated upon binding of the tumor suppressor
APC (adenomatous polyposis coli), leading to the
activation of Rac1 or Cdc42. In its autoinhibited form,
the SH3 domain of ASEF forms an extensive interface with
the DH and PH domains, blocking the Rac binding site.
SH3 domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 31.2 bits (71), Expect = 0.064
Identities = 10/62 (16%), Positives = 27/62 (43%), Gaps = 10/62 (16%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPE 126
A +++ +D + + F+ GD+++++ D +WW + G P+
Sbjct: 1 LAEALWDHVTMDPE-------ELGFKAGDVIEVLDMSDKDWWWGS---IRDEEGWFPASF 50
Query: 127 LQ 128
++
Sbjct: 51 VR 52
>gnl|CDD|212891 cd11958, SH3_RUSC1, Src homology 3 domain of RUN and SH3
domain-containing protein 1. 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. RUSC proteins are
adaptor proteins consisting of RUN, leucine zipper, 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 = 51
Score = 31.0 bits (70), Expect = 0.075
Identities = 10/39 (25%), Positives = 24/39 (61%), Gaps = 3/39 (7%)
Query: 85 AQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIP 123
+++ ++F+ G+ LQ++ D +W + R+ + GL+P
Sbjct: 11 SESQLSFRKGEELQVLGTVDEDWIRCRRGD---REGLVP 46
>gnl|CDD|237809 PRK14738, gmk, guanylate kinase; Provisional.
Length = 206
Score = 33.9 bits (78), Expect = 0.079
Identities = 22/73 (30%), Positives = 35/73 (47%), Gaps = 6/73 (8%)
Query: 284 FSLPFSVYRRDTTRSPRSDEENGRAYYFISHDEMMSDIAANQYLE----YG--KSILTHP 337
LPF TTR R E +G Y+F++ +E I+ N+ LE YG + P
Sbjct: 36 RKLPFHFVVTATTRPKRPGEIDGVDYHFVTPEEFREMISQNELLEWAEVYGNYYGVPKAP 95
Query: 338 SQRHIVSCRKLVV 350
++ + S R ++V
Sbjct: 96 VRQALASGRDVIV 108
>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 = 30.9 bits (70), Expect = 0.081
Identities = 17/58 (29%), Positives = 25/58 (43%), Gaps = 9/58 (15%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
+V A ++Y DD I GD + +I DD + W + N G GL P+
Sbjct: 1 YVEALYDYEAQGDDEISIRV-------GDRIAVIRGDDGSGWTYGEIN--GVKGLFPT 49
>gnl|CDD|212890 cd11957, SH3_RUSC2, Src homology 3 domain of RUN and SH3
domain-containing protein 2. RUSC2, also called Iporin
or Interacting protein of Rab1, 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.
RUSC proteins are adaptor proteins consisting of RUN,
leucine zipper, 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 = 31.0 bits (70), Expect = 0.085
Identities = 12/35 (34%), Positives = 23/35 (65%), Gaps = 3/35 (8%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIP 123
++F GDILQ++S+ D +W + ++ +GL+P
Sbjct: 16 LSFNKGDILQVLSRADGDWLRC---SLGPDSGLVP 47
>gnl|CDD|212914 cd11981, SH3_VAV3_1, First 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 = 62
Score = 31.4 bits (71), Expect = 0.088
Identities = 16/46 (34%), Positives = 24/46 (52%), Gaps = 6/46 (13%)
Query: 83 PCAQAG--IAFQIGDILQIISKDDHN-WWQARKDNVA-GSAGLIPS 124
P G + QIGD ++++ D H+ +WQ R N+ G G PS
Sbjct: 14 PQLHGGPPLNAQIGDTIEVLYADPHSLFWQGR--NLTTGELGFFPS 57
>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 = 30.9 bits (70), Expect = 0.089
Identities = 16/36 (44%), Positives = 24/36 (66%), Gaps = 4/36 (11%)
Query: 89 IAFQIGDILQIIS-KDDHNWWQARKDNVAGSAGLIP 123
+ FQ GDIL+I++ +DD NW++A + G G IP
Sbjct: 16 LPFQKGDILKILNMEDDQNWYKAE---LQGREGYIP 48
>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 = 31.1 bits (70), Expect = 0.099
Identities = 17/57 (29%), Positives = 31/57 (54%), Gaps = 10/57 (17%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
VRA +++ ++D+ + F+ G+I+ ++ D NWW+ +N G GL PS
Sbjct: 4 VRALYDFEAVEDN-------ELTFKHGEIIIVLDDSDANWWKG--ENHRG-VGLFPS 50
>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 = 30.8 bits (70), Expect = 0.12
Identities = 18/62 (29%), Positives = 30/62 (48%), Gaps = 14/62 (22%)
Query: 67 FVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHN----WWQARKDNVAGSAGLI 122
VRA ++Y D+ ++F G I++I+ KDD+ WW+ + G G+
Sbjct: 1 LVRALYDYEAQSDE-------ELSFPEGAIIRILRKDDNGVDDGWWEGEFN---GRVGVF 50
Query: 123 PS 124
PS
Sbjct: 51 PS 52
>gnl|CDD|212987 cd12054, SH3_CD2AP_2, Second Src Homology 3 domain (SH3B) of
CD2-associated protein. CD2AP, also called CMS (Cas
ligand with Multiple SH3 domains) or METS1
(Mesenchyme-to-Epithelium Transition protein with SH3
domains), is a cytosolic adaptor protein that plays a
role in regulating the cytoskeleton. It is critical in
cell-to-cell union necessary for kidney function. It
also stabilizes the contact between a T cell and
antigen-presenting cells. It is primarily expressed in
podocytes at the cytoplasmic face of the slit diaphragm
and serves as a linker anchoring podocin and nephrin to
the actin cytoskeleton. CD2AP contains three SH3
domains, a proline-rich region, and a C-terminal
coiled-coil domain. All of these domains enable CD2AP to
bind various protein partners and assemble complexes
that have been implicated in many different functions.
This alignment model represents the second SH3 domain
(SH3B) of CD2AP. SH3B binds to c-Cbl in a site (TPSSRPLR
is the core binding motif) distinct from the c-Cbl/SH3A
binding site. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 55
Score = 30.7 bits (69), Expect = 0.12
Identities = 16/58 (27%), Positives = 28/58 (48%), Gaps = 10/58 (17%)
Query: 72 FNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPELQE 129
F Y P ++D + ++GDI+ I + + WW + G +GL PS ++E
Sbjct: 7 FEYVPQNED-------ELELKVGDIIDINEEVEEGWWSG---TLNGKSGLFPSNFVKE 54
>gnl|CDD|212838 cd11905, SH3_Tec, Src Homology 3 domain of Tec (Tyrosine kinase
expressed in hepatocellular carcinoma). Tec is a
cytoplasmic (or nonreceptor) tyr kinase containing Src
homology protein interaction domains (SH3, SH2)
N-terminal to the catalytic tyr kinase domain. It also
contains an N-terminal pleckstrin homology (PH) domain,
which binds the products of PI3K and allows membrane
recruitment and activation, and the Tec homology (TH)
domain, which contains proline-rich and zinc-binding
regions. It is more widely-expressed than other Tec
subfamily kinases. Tec is found in endothelial cells,
both B- and T-cells, and a variety of myeloid cells
including mast cells, erythroid cells, platelets,
macrophages and neutrophils. Tec is a key component of
T-cell receptor (TCR) signaling, and is important in
TCR-stimulated proliferation, IL-2 production and
phospholipase C-gamma1 activation. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 30.6 bits (69), Expect = 0.13
Identities = 12/26 (46%), Positives = 17/26 (65%), Gaps = 2/26 (7%)
Query: 99 IISKDDHNWWQARKDNVAGSAGLIPS 124
I+ K+D +WW+AR + G G IPS
Sbjct: 27 ILEKNDVHWWKAR--DKYGKEGYIPS 50
Score = 30.6 bits (69), Expect = 0.13
Identities = 12/26 (46%), Positives = 17/26 (65%), Gaps = 2/26 (7%)
Query: 233 IISKDDHNWWQARKDNVAGSAGLIPS 258
I+ K+D +WW+AR + G G IPS
Sbjct: 27 ILEKNDVHWWKAR--DKYGKEGYIPS 50
>gnl|CDD|212924 cd11991, SH3_Intersectin1_3, Third Src homology 3 domain (or SH3C)
of Intersectin-1. Intersectin-1 (ITSN1) is an adaptor
protein that functions in exo- and endocytosis, actin
cytoskeletal reorganization, and signal transduction. It
plays a role in clathrin-coated pit (CCP) formation. It
binds to many proteins through its multidomain structure
and facilitate the assembly of multimeric complexes.
ITSN1 localizes in membranous organelles, CCPs, the
Golgi complex, and may be involved in the cell membrane
trafficking system. It exists in alternatively spliced
short and long isoforms. The short isoform contains two
Eps15 homology domains (EH1 and EH2), a coiled-coil
region and five SH3 domains (SH3A-E), while the long
isoform, in addition, contains RhoGEF (also called
Dbl-homologous or DH), Pleckstrin homology (PH) and C2
domains. The third SH3 domain (or SH3C) of ITSN1 has
been shown to bind many proteins including dynamin1/2,
CIN85, c-Cbl, SHIP2, Reps1, synaptojanin-1, and WNK,
among others. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 52
Score = 30.3 bits (68), Expect = 0.14
Identities = 13/39 (33%), Positives = 21/39 (53%), Gaps = 4/39 (10%)
Query: 86 QAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
Q + FQ GD++ +++K D +WW V G+ PS
Sbjct: 13 QGDLTFQQGDVI-LVTKKDGDWWTG---TVGDKTGVFPS 47
>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 = 30.5 bits (69), Expect = 0.14
Identities = 16/38 (42%), Positives = 22/38 (57%), Gaps = 5/38 (13%)
Query: 89 IAFQIGDILQIISK-DDHN-WWQARKDNVAGSAGLIPS 124
+AFQ GDI+ I+ K D N WW R + G G+ P+
Sbjct: 16 LAFQKGDIITILKKSDSQNDWWTGR---IGGREGIFPA 50
>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 = 30.4 bits (69), Expect = 0.15
Identities = 13/36 (36%), Positives = 23/36 (63%), Gaps = 1/36 (2%)
Query: 94 GDILQIISKDDHNWWQARKDNVAGSAGLIPSPELQE 129
DI+ I+ K+D+ WW A+K + + G +P+ L+E
Sbjct: 21 DDIVYIVQKEDNGWWLAKKLDESKE-GWVPAAYLEE 55
>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 = 30.2 bits (68), Expect = 0.18
Identities = 16/57 (28%), Positives = 30/57 (52%), Gaps = 10/57 (17%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
VRA +++ L+DD + F GD+++++ + +WW+ R G GL P+
Sbjct: 2 VRALYDFEALEDD-------ELGFNSGDVIEVLDSSNPSWWKGRL---HGKLGLFPA 48
>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 = 30.4 bits (68), Expect = 0.18
Identities = 12/51 (23%), Positives = 27/51 (52%), Gaps = 3/51 (5%)
Query: 80 DLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPELQEW 130
D + A +AF+ GD+++++ + +WW + D+ G P+ ++ W
Sbjct: 12 DHVTMANRELAFKAGDVIKVLDASNKDWWWGQIDD---EEGWFPASFVRLW 59
>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 = 30.1 bits (68), Expect = 0.20
Identities = 15/46 (32%), Positives = 24/46 (52%), Gaps = 3/46 (6%)
Query: 84 CAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPELQE 129
Q GI+FQ G +++I K+ WW + D G G PS +++
Sbjct: 11 TIQDGISFQKGQKVEVIDKNPSGWWYVKID---GKEGWAPSSYIEK 53
>gnl|CDD|212754 cd11820, SH3_STAM, Src homology 3 domain of Signal Transducing
Adaptor Molecules. STAMs were discovered as proteins
that are highly phosphorylated following cytokine and
growth factor stimulation. They function in cytokine
signaling and surface receptor degradation, as well as
regulate Golgi morphology. They associate with many
proteins including Jak2 and Jak3 tyrosine kinases, Hrs,
AMSH, and UBPY. STAM adaptor proteins contain VHS
(Vps27, Hrs, STAM homology), ubiquitin interacting
(UIM), and SH3 domains. There are two vertebrate STAMs,
STAM1 and STAM2, which may be functionally redundant;
vertebrate STAMs contain ITAM motifs. They are part of
the endosomal sorting complex required for transport
(ESCRT-0). STAM2 deficiency in mice did not cause any
obvious abnormality, while STAM1 deficiency resulted in
growth retardation. Loss of both STAM1 and STAM2 in mice
proved lethal, indicating that STAMs are important for
embryonic development. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 54
Score = 30.1 bits (68), Expect = 0.20
Identities = 16/57 (28%), Positives = 29/57 (50%), Gaps = 10/57 (17%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
VRA +++ +D+ + F+ G+I+ ++ D NWW+ N G GL P+
Sbjct: 3 VRALYDFEAAEDN-------ELTFKAGEIITVLDDSDPNWWKG--SNHRGE-GLFPA 49
>gnl|CDD|212783 cd11849, SH3_SPIN90, Src homology 3 domain of SH3 protein
interacting with Nck, 90 kDa (SPIN90). SPIN90 is also
called NCK interacting protein with SH3 domain
(NCKIPSD), Dia-interacting protein (DIP), 54 kDa
vimentin-interacting protein (VIP54), or
WASP-interacting SH3-domain protein (WISH). It is an
F-actin binding protein that regulates actin
polymerization and endocytosis. It associates with the
Arp2/3 complex near actin filaments and determines
filament localization at the leading edge of
lamellipodia. SPIN90 is expressed in the early stages of
neuronal differentiation and plays a role in regulating
growth cone dynamics and neurite outgrowth. It also
interacts with IRSp53 and regulates cell motility by
playing a role in the formation of membrane protrusions.
SPIN90 contains an N-terminal SH3 domain, a proline-rich
domain, and a C-terminal VCA (verprolin-homology and
cofilin-like acidic) domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 30.0 bits (68), Expect = 0.20
Identities = 8/36 (22%), Positives = 19/36 (52%), Gaps = 2/36 (5%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
++F G+ ++ + + +WW N +G G +P+
Sbjct: 16 LSFSEGETFLLLERSNAHWWLVT--NHSGETGYVPA 49
>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 = 29.7 bits (67), Expect = 0.24
Identities = 10/33 (30%), Positives = 20/33 (60%), Gaps = 5/33 (15%)
Query: 85 AQAG--IAFQIGDILQII---SKDDHNWWQARK 112
AQA ++ ++GDI+ +I ++ WW+ +K
Sbjct: 10 AQAPDELSLEVGDIVSVIDMPPPEESTWWRGKK 42
>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 = 29.6 bits (67), Expect = 0.25
Identities = 15/57 (26%), Positives = 27/57 (47%), Gaps = 8/57 (14%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
RA ++Y DDD ++FQ GD++ + D W + G +G++P+
Sbjct: 2 YRAMYDYAAADDD-------EVSFQEGDVIINVEIIDDGWMEGTVQR-TGQSGMLPA 50
>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 = 29.3 bits (66), Expect = 0.31
Identities = 12/36 (33%), Positives = 19/36 (52%), Gaps = 3/36 (8%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
++F+ GD L ++ K +WW A G G IP+
Sbjct: 16 LSFESGDKLLVLRKPSVDWWWAEH---NGCCGYIPA 48
>gnl|CDD|212821 cd11888, SH3_ARHGAP9_like, Src Homology 3 domain of Rho
GTPase-activating protein 9 and similar proteins. This
subfamily is composed of Rho GTPase-activating proteins
including mammalian ARHGAP9, and vertebrate ARHGAPs 12
and 27. RhoGAPs (or ARHGAPs) bind to Rho proteins and
enhance the hydrolysis rates of bound GTP. ARHGAP9
functions as a GAP for Rac and Cdc42, but not for RhoA.
It negatively regulates cell migration and adhesion. It
also acts as a docking protein for the MAP kinases Erk2
and p38alpha, and may facilitate cross-talk between the
Rho GTPase and MAPK pathways to control actin
remodeling. ARHGAP27, also called CAMGAP1, shows GAP
activity towards Rac1 and Cdc42. It binds the adaptor
protein CIN85 and may play a role in clathrin-mediated
endocytosis. ARHGAP12 has been shown to display GAP
activity towards Rac1. It plays a role in regulating
HFG-driven cell growth and invasiveness. ARHGAPs in this
subfamily contain SH3, WW, Pleckstin homology (PH), and
RhoGAP domains. 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 = 29.3 bits (66), Expect = 0.32
Identities = 10/49 (20%), Positives = 20/49 (40%), Gaps = 7/49 (14%)
Query: 65 QIFVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKD 113
+ V F Y D ++ + G+ ++ K + +WWQ R+
Sbjct: 1 YVVVLYPFEYTGKDGR-------KVSIKEGERFLLLKKSNDDWWQVRRP 42
>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 = 29.7 bits (67), Expect = 0.32
Identities = 13/50 (26%), Positives = 23/50 (46%), Gaps = 8/50 (16%)
Query: 80 DLIPCAQAGIAFQIGDILQIISKD-----DHNWWQARKDNVAGSAGLIPS 124
D A+ + + GD ++++SKD D WW + + G+ PS
Sbjct: 7 DYEASAEDELTLRRGDRVEVLSKDSAVSGDEGWWTGK---INDRVGIFPS 53
>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 = 29.6 bits (66), Expect = 0.44
Identities = 17/72 (23%), Positives = 31/72 (43%), Gaps = 10/72 (13%)
Query: 53 QAGIAFQIGDILQIFVRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARK 112
Q I I D + A +++ +DD + F+ GD+++++ + WW R
Sbjct: 5 QLAINELISDGSVVCAEALWDHVTMDDQ-------ELGFKAGDVIEVMDATNKEWWWGR- 56
Query: 113 DNVAGSAGLIPS 124
V S G P+
Sbjct: 57 --VLDSEGWFPA 66
>gnl|CDD|212941 cd12008, SH3_Src, Src homology 3 domain of Src Protein Tyrosine
Kinase. Src (or c-Src) is a cytoplasmic (or
non-receptor) PTK and is the vertebrate homolog of the
oncogenic protein (v-Src) from Rous sarcoma virus.
Together with other Src subfamily proteins, it is
involved in signaling pathways that regulate cytokine
and growth factor responses, cytoskeleton dynamics, cell
proliferation, survival, and differentiation. Src also
play a role in regulating cell adhesion, invasion, and
motility in cancer cells, and tumor vasculature,
contributing to cancer progression and metastasis.
Elevated levels of Src kinase activity have been
reported in a variety of human cancers. Several
inhibitors of Src have been developed as anti-cancer
drugs. Src is also implicated in acute inflammatory
responses and osteoclast function. Src kinases contain
an N-terminal SH4 domain with a myristoylation site,
followed by SH3 and SH2 domains, a tyr kinase domain,
and a regulatory C-terminal region containing a
conserved tyr. They are activated by autophosphorylation
at the tyr kinase domain, but are negatively regulated
by phosphorylation at the C-terminal tyr by Csk
(C-terminal Src Kinase). The SH3 domain of Src kinases
contributes to substrate recruitment by binding adaptor
proteins/substrates, and regulation of kinase activity
through an intramolecular interaction. SH3 domains are
protein interaction domains that bind to proline-rich
ligands with moderate affinity and selectivity,
preferentially to PxxP motifs. They play versatile and
diverse roles in the cell including the regulation of
enzymes, changing the subcellular localization of
signaling pathway components, and mediating the
formation of multiprotein complex assemblies.
Length = 56
Score = 29.3 bits (65), Expect = 0.46
Identities = 13/39 (33%), Positives = 22/39 (56%), Gaps = 1/39 (2%)
Query: 86 QAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
+ ++F+ G+ LQI++ + +WW A G G IPS
Sbjct: 13 ETDLSFKKGERLQIVNNTEGDWWLAHSLT-TGQTGYIPS 50
>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 = 28.6 bits (64), Expect = 0.54
Identities = 12/31 (38%), Positives = 18/31 (58%), Gaps = 2/31 (6%)
Query: 94 GDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
GDI++++ KD+ NWW V G G P+
Sbjct: 21 GDIIRVLYKDNDNWWFGSL--VNGQQGYFPA 49
>gnl|CDD|212745 cd11811, SH3_CHK, Src Homology 3 domain of CSK homologous kinase.
CHK is also referred to as megakaryocyte-associated
tyrosine kinase (Matk). It inhibits Src kinases using a
noncatalytic mechanism by simply binding to them. As a
negative regulator of Src kinases, Chk may play
important roles in cell proliferation, survival, and
differentiation, and consequently, in cancer development
and progression. To inhibit Src kinases that are
anchored to the plasma membrane, CHK is translocated to
the membrane via binding to specific transmembrane
proteins, G-proteins, or adaptor proteins near the
membrane. CHK also plays a role in neural
differentiation in a manner independent of Src by
enhancing MAPK activation via Ras-mediated signaling. It
is a cytoplasmic (or nonreceptor) tyr kinase containing
the Src homology domains, SH3 and SH2, N-terminal to the
catalytic tyr kinase domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 59
Score = 29.0 bits (65), Expect = 0.55
Identities = 13/41 (31%), Positives = 22/41 (53%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPELQE 129
+AF GDI+ I+ + W + N +G GL+ + L+E
Sbjct: 18 LAFHKGDIVTIVETCERKGWYRARHNTSGEEGLVAAGALRE 58
>gnl|CDD|153341 cd07657, F-BAR_Fes_Fer, The F-BAR (FES-CIP4 Homology and
Bin/Amphiphysin/Rvs) domain of Fes (feline sarcoma) and
Fer (Fes related) tyrosine kinases. F-BAR domains are
dimerization modules that bind and bend membranes and
are found in proteins involved in membrane dynamics and
actin reorganization. Fes (feline sarcoma), also called
Fps (Fujinami poultry sarcoma), and Fer (Fes related)
are cytoplasmic (or nonreceptor) tyrosine kinases that
play roles in haematopoiesis, inflammation and immunity,
growth factor signaling, cytoskeletal regulation, cell
migration and adhesion, and the regulation of cell-cell
interactions. Although Fes and Fer show redundancy in
their biological functions, they show differences in
their expression patterns. Fer is ubiquitously expressed
while Fes is expressed predominantly in myeloid and
endothelial cells. Fes and Fer contain an N-terminal
F-BAR domain, an SH2 domain, and a C-terminal catalytic
kinase domain. F-BAR domains form banana-shaped dimers
with a positively-charged concave surface that binds to
negatively-charged lipid membranes. They can induce
membrane deformation in the form of long tubules. The
F-BAR domain of Fes is critical in its role in
microtubule nucleation and bundling.
Length = 237
Score = 31.2 bits (71), Expect = 0.59
Identities = 21/86 (24%), Positives = 30/86 (34%), Gaps = 11/86 (12%)
Query: 117 GSAGLIPSPELQEWRTACSTIDKTKH------EQVNCSIFGRKKKLYKDKYLAKHN--AV 168
L SP + W+ + D+ E + + L KDK AK
Sbjct: 54 AGDDLQGSPISKSWKEIMDSTDQLSKLIKQHAEALESGTLDKLTLLIKDKRKAKKAYQEE 113
Query: 169 FDQLDL---VTYEEVVKLPSFKRKTL 191
Q+D +EV KL S +K L
Sbjct: 114 RQQIDEQYKKLTDEVEKLKSEYQKLL 139
>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 = 28.8 bits (64), Expect = 0.61
Identities = 16/50 (32%), Positives = 28/50 (56%), Gaps = 2/50 (4%)
Query: 80 DLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPELQE 129
D +P + +A + + I+ + D +WW+AR + G+ GLIPS + E
Sbjct: 8 DFLPREPSNLALKRAEEYLILEQYDPHWWKAR--DRYGNEGLIPSNYVTE 55
Score = 27.6 bits (61), Expect = 1.7
Identities = 13/33 (39%), Positives = 21/33 (63%), Gaps = 2/33 (6%)
Query: 231 FQIISKDDHNWWQARKDNVAGSAGLIPSPELQE 263
+ I+ + D +WW+AR + G+ GLIPS + E
Sbjct: 25 YLILEQYDPHWWKAR--DRYGNEGLIPSNYVTE 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 = 28.6 bits (64), Expect = 0.62
Identities = 10/36 (27%), Positives = 17/36 (47%), Gaps = 3/36 (8%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
++FQ GD + + D W + R + G G+ P
Sbjct: 16 LSFQRGDRILVTEHLDAEWSRGR---LNGREGIFPR 48
>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 = 28.8 bits (65), Expect = 0.64
Identities = 12/37 (32%), Positives = 18/37 (48%), Gaps = 7/37 (18%)
Query: 68 VRAQFNYNPLDDDLIPCAQAGIAFQIGDILQIISKDD 104
VRA +Y D D + F+ GD++ +I DD
Sbjct: 5 VRATHDYTAEDTD-------ELTFEKGDVILVIPFDD 34
>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 = 28.7 bits (64), Expect = 0.66
Identities = 13/41 (31%), Positives = 19/41 (46%), Gaps = 3/41 (7%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPELQE 129
+ G+ +++I K WW RK V G PS LQ+
Sbjct: 16 LTLLEGEAIEVIHKLLDGWWVVRKGEV---TGYFPSMYLQK 53
>gnl|CDD|212781 cd11847, SH3_Brk, Src homology 3 domain of Brk (Breast tumor
kinase) Protein Tyrosine Kinase (PTK), also called PTK6.
Brk is a cytoplasmic (or non-receptor) PTK with limited
homology to Src kinases. It has been found to be
overexpressed in a majority of breast tumors. It plays
roles in normal cell differentiation, proliferation,
survival, migration, and cell cycle progression. Brk
substrates include RNA-binding proteins (SLM-1/2,
Sam68), transcription factors (STAT3/5), and signaling
molecules (Akt, paxillin, IRS-4). Src kinases in general
contain an N-terminal SH4 domain with a myristoylation
site, followed by SH3 and SH2 domains, a tyr kinase
domain, and a regulatory C-terminal region containing a
conserved tyr; they are activated by autophosphorylation
at the tyr kinase domain, but are negatively regulated
by phosphorylation at the C-terminal tyr by Csk
(C-terminal Src Kinase). However, Brk lacks the
N-terminal myristoylation site. The SH3 domain of Src
kinases contributes to substrate recruitment by binding
adaptor proteins/substrates, and regulation of kinase
activity through an intramolecular interaction. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 58
Score = 28.7 bits (64), Expect = 0.72
Identities = 13/38 (34%), Positives = 20/38 (52%), Gaps = 4/38 (10%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSA---GLIP 123
++FQ GD +I + +WW A K + AG G +P
Sbjct: 16 LSFQAGDQFRIAERSG-DWWTALKLDRAGGVVAQGFVP 52
>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 = 28.0 bits (63), Expect = 1.0
Identities = 11/51 (21%), Positives = 21/51 (41%), Gaps = 9/51 (17%)
Query: 68 VRAQFNYNP-LDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAG 117
+FNY +D+L + + GD + ++ K WW+ + G
Sbjct: 2 AVVKFNYEAQREDEL--------SLRKGDRVLVLEKSSDGWWRGECNGQVG 44
>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 = 28.0 bits (63), Expect = 1.1
Identities = 14/51 (27%), Positives = 24/51 (47%), Gaps = 13/51 (25%)
Query: 83 PCAQA----------GIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIP 123
PC +A + F+ GDI+ + ++ D NW++ V G +G P
Sbjct: 1 PCCRALYDFEPENEGELGFKEGDIITLTNQIDENWYEGM---VNGQSGFFP 48
>gnl|CDD|237051 PRK12307, PRK12307, putative sialic acid transporter; Provisional.
Length = 426
Score = 30.7 bits (69), Expect = 1.1
Identities = 25/102 (24%), Positives = 40/102 (39%), Gaps = 22/102 (21%)
Query: 193 LLGAHGVGRRHIKNTLINKFPDKYAYPVPQFITVCSVMFQIISKDDHNWWQARKDNVAGS 252
L+ G+G I + F + Y + F+ + V+ I + +AR
Sbjct: 147 LVSGFGIGNI-IAAYFMPSFAEAYGWRAAFFVGLLPVLLVI-------YIRAR------- 191
Query: 253 AGLIPSPELQEWRTACSTIDKTKHEQGIYSSFSLPF-SVYRR 293
+PE +EW A K KH Q +S FSL ++ R
Sbjct: 192 -----APESKEWEEA-KLSGKGKHSQSAWSVFSLSMKGLFNR 227
>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 = 28.1 bits (63), Expect = 1.1
Identities = 16/57 (28%), Positives = 30/57 (52%), Gaps = 14/57 (24%)
Query: 69 RAQFNYNPLDDDLIPCAQAGI--AFQIGDILQIISKDDHNWWQARKDNVAGSAGLIP 123
RA++N+N A G+ +F+ GD++ + + D NW++ R + G G+ P
Sbjct: 3 RAKYNFN---------ADTGVELSFRKGDVITLTRRVDENWYEGR---IGGRQGIFP 47
>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 = 27.8 bits (62), Expect = 1.2
Identities = 17/60 (28%), Positives = 28/60 (46%), Gaps = 16/60 (26%)
Query: 68 VRAQFNY---NPLDDDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPS 124
V A F+Y P D + FQ GD++ ++SK + +W + + G G+ PS
Sbjct: 2 VVALFSYEASQPED----------LEFQKGDVILVLSKVNEDWLEGQ---CKGKIGIFPS 48
>gnl|CDD|212913 cd11980, SH3_VAV2_1, First 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 = 60
Score = 28.0 bits (62), Expect = 1.3
Identities = 10/30 (33%), Positives = 18/30 (60%), Gaps = 1/30 (3%)
Query: 83 PCAQAGIAFQIGDILQIISKD-DHNWWQAR 111
P + + FQ GD+++++ D D WW+ R
Sbjct: 14 PPGKPVLTFQTGDVIELLRGDPDSPWWEGR 43
>gnl|CDD|212948 cd12015, SH3_Tks_1, First Src homology 3 domain of Tyrosine kinase
substrate (Tks) proteins. Tks proteins are Src
substrates and scaffolding proteins that play important
roles in the formation of podosomes and invadopodia, the
dynamic actin-rich structures that are related to cell
migration and cancer cell invasion. Vertebrates contain
two Tks proteins, Tks4 (Tyr kinase substrate with four
SH3 domains) and Tks5 (Tyr kinase substrate with five
SH3 domains), which display partially overlapping but
non-redundant functions. Both associate with the ADAMs
family of transmembrane metalloproteases, which function
as sheddases and mediators of cell and matrix
interactions. Tks5 interacts with N-WASP and Nck, while
Tks4 is essential for the localization of MT1-MMP
(membrane-type 1 matrix metalloproteinase) to
invadopodia. Tks proteins contain an N-terminal Phox
homology (PX) domain and four or five SH3 domains. This
model characterizes the first SH3 domain of Tks
proteins. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 27.8 bits (62), Expect = 1.4
Identities = 7/20 (35%), Positives = 15/20 (75%)
Query: 89 IAFQIGDILQIISKDDHNWW 108
I+ + GD++ +I K+++ WW
Sbjct: 16 ISLRAGDVVDVIEKNENGWW 35
>gnl|CDD|212977 cd12044, SH3_SKAP1, Src Homology 3 domain of Src Kinase-Associated
Phosphoprotein 1. SKAP1, also called SKAP55 (Src
kinase-associated protein of 55kDa), is an immune
cell-specific adaptor protein that plays an important
role in T-cell adhesion, migration, and integrin
clustering. It is expressed exclusively in
T-lymphocytes, mast cells, and macrophages. Binding
partners include ADAP (adhesion and
degranulation-promoting adaptor protein), Fyn, Riam,
RapL, and RasGRP. It contains a pleckstrin homology (PH)
domain, a C-terminal SH3 domain, and several tyrosine
phosphorylation sites. The SH3 domain of SKAP1 is
necessary for its ability to regulate T-cell conjugation
with antigen-presenting cells and the formation of LFA-1
clusters. SKAP1 binds primarily to a proline-rich region
of ADAP through its SH3 domain; its degradation is
regulated by ADAP. A secondary interaction occurs via
the ADAP SH3 domain and the RKxxYxxY motif in SKAP1. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 53
Score = 27.5 bits (61), Expect = 1.6
Identities = 12/37 (32%), Positives = 22/37 (59%), Gaps = 5/37 (13%)
Query: 89 IAFQIGDILQIISKDDH--NWWQARKDNVAGSAGLIP 123
++FQ GD++ I+SK+ + WW + G G++P
Sbjct: 16 LSFQRGDLIYILSKEYNMYGWWVGELN---GIVGIVP 49
>gnl|CDD|215165 PLN02292, PLN02292, ferric-chelate reductase.
Length = 702
Score = 30.2 bits (68), Expect = 1.8
Identities = 12/34 (35%), Positives = 19/34 (55%), Gaps = 3/34 (8%)
Query: 223 FITVCSVMFQIISKDDHNWWQARKDNVAGSAGLI 256
F+T+ Q + D + WQAR D++A GL+
Sbjct: 146 FVTITP---QSAATDGESLWQARLDSIAVRLGLV 176
Score = 28.7 bits (64), Expect = 5.0
Identities = 10/25 (40%), Positives = 15/25 (60%)
Query: 98 QIISKDDHNWWQARKDNVAGSAGLI 122
Q + D + WQAR D++A GL+
Sbjct: 152 QSAATDGESLWQARLDSIAVRLGLV 176
>gnl|CDD|212905 cd11972, SH3_Abi2, Src homology 3 domain of Abl Interactor 2. Abi2
is highly expressed in the brain and eye. It regulates
actin cytoskeletal reorganization at adherens junctions
and dendritic spines, which is important in cell
morphogenesis, migration, and cognitive function. Mice
deficient with Abi2 show defects in orientation and
migration of lens fibers, neuronal migration, dendritic
spine morphology, as well as deficits in learning and
memory. Abi proteins are adaptor proteins serving as
binding partners and substrates of Abl tyrosine kinases.
They are involved in regulating actin cytoskeletal
reorganization and play important roles in
membrane-ruffling, endocytosis, cell motility, and cell
migration. Abi proteins contain a homeobox homology
domain, a proline-rich region, and a SH3 domain. The SH3
domain of Abi binds to a PxxP motif in Abl. SH3 domains
are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 61
Score = 27.7 bits (61), Expect = 1.9
Identities = 10/29 (34%), Positives = 18/29 (62%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAG 117
++FQ G I+ +I K+D W++ + V G
Sbjct: 19 LSFQEGAIIYVIKKNDDGWYEGVMNGVTG 47
>gnl|CDD|212907 cd11974, SH3_ASEF2, Src homology 3 domain of APC-Stimulated guanine
nucleotide Exchange Factor 2. ASEF2, also called
Spermatogenesis-associated protein 13 (SPATA13), is a
GEF that localizes with actin at the leading edge of
cells and is important in cell migration and adhesion
dynamics. GEFs activate small GTPases by exchanging
bound GDP for free GTP. ASEF2 can activate both Rac 1
and Cdc42, but only Rac1 activation is necessary for
increased cell migration and adhesion turnover. Together
with APC (adenomatous polyposis coli) and Neurabin2, a
scaffold protein that binds F-actin, it is involved in
regulating HGF-induced cell migration. ASEF2 contains a
SH3 domain followed by RhoGEF (also called
Dbl-homologous or DH) and Pleckstrin Homology (PH)
domains. SH3 domains are protein interaction domains
that bind to proline-rich ligands with moderate affinity
and selectivity, preferentially to PxxP motifs. They
play versatile and diverse roles in the cell including
the regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 54
Score = 27.3 bits (60), Expect = 2.0
Identities = 7/23 (30%), Positives = 16/23 (69%)
Query: 89 IAFQIGDILQIISKDDHNWWQAR 111
+AF+ GD+++++ + +WW R
Sbjct: 17 LAFKAGDVIRVLEASNKDWWWGR 39
>gnl|CDD|172375 PRK13851, PRK13851, type IV secretion system protein VirB11;
Provisional.
Length = 344
Score = 29.9 bits (67), Expect = 2.1
Identities = 23/88 (26%), Positives = 41/88 (46%), Gaps = 11/88 (12%)
Query: 152 RKKKLYKDKYLAKHNAVFDQLDLVTYEEVVKLPSFKRKTLVLLGAHGVGRRHIKNTLINK 211
RK++ D+ + +H +D DL E + R T++L G G G+ + TLI+
Sbjct: 132 RKRRDQLDEAILRH---YDNGDL---EAFLHACVVGRLTMLLCGPTGSGKTTMSKTLISA 185
Query: 212 FPDKYAYPVPQFITVCSVMFQIISKDDH 239
P P + IT+ + +I ++H
Sbjct: 186 IP-----PQERLITIEDTLELVIPHENH 208
>gnl|CDD|217287 pfam02921, UCR_TM, Ubiquinol cytochrome reductase transmembrane
region. Each subunit of the cytochrome bc1 complex
provides a single helix (this family) to make up the
transmembrane region of the complex.
Length = 63
Score = 27.3 bits (61), Expect = 2.3
Identities = 10/27 (37%), Positives = 16/27 (59%), Gaps = 2/27 (7%)
Query: 288 FSVYRRDTTRSP-RSDEENGRAY-YFI 312
FS YRR +T+ R ++ RA+ Y +
Sbjct: 9 FSDYRRKSTKDKSRESDDGRRAFSYLM 35
>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 = 27.2 bits (60), Expect = 2.4
Identities = 10/35 (28%), Positives = 19/35 (54%), Gaps = 3/35 (8%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIP 123
++F+ G L + + +WW+ R + G GL+P
Sbjct: 16 LSFKKGASLLLYHRASDDWWEGRHN---GIDGLVP 47
>gnl|CDD|212791 cd11857, SH3_DBS, Src homology 3 domain of DBL's Big Sister (DBS),
a guanine nucleotide exchange factor. DBS, also called
MCF2L (MCF2-transforming sequence-like protein) or OST,
is a Rho GTPase guanine nucleotide exchange factor
(RhoGEF), facilitating the exchange of GDP and GTP. It
was originally isolated from a cDNA screen for sequences
that cause malignant growth. It plays roles in
regulating clathrin-mediated endocytosis and cell
migration through its activation of Rac1 and Cdc42.
Depending on cell type, DBS can also activate RhoA and
RhoG. DBS contains a Sec14-like domain, spectrin-like
repeats, a RhoGEF [or Dbl homology (DH)] domain, a
Pleckstrin homology (PH) domain, and an SH3 domain. SH3
domains are protein interaction domains that bind to
proline-rich ligands with moderate affinity and
selectivity, preferentially to PxxP motifs. They play
versatile and diverse roles in the cell including the
regulation of enzymes, changing the subcellular
localization of signaling pathway components, and
mediating the formation of multiprotein complex
assemblies.
Length = 55
Score = 26.9 bits (60), Expect = 2.6
Identities = 10/35 (28%), Positives = 18/35 (51%), Gaps = 1/35 (2%)
Query: 94 GDILQIISKDDHNWWQARKDNVAGSAGLIPSPELQ 128
GD++Q+I + D W + + G +P+ LQ
Sbjct: 21 GDLVQLIHEGDEGQWLVKNLST-RKEGWVPAANLQ 54
>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 = 26.9 bits (59), Expect = 2.7
Identities = 13/42 (30%), Positives = 22/42 (52%), Gaps = 4/42 (9%)
Query: 89 IAFQIGDILQIISKDDHN-WWQARKDNVAGSAGLIPSPELQE 129
++ GD+++I +K N WW + V G G PS ++E
Sbjct: 17 LSLLKGDVVKIYTKMSTNGWW---RGEVNGRVGWFPSTYVEE 55
>gnl|CDD|213019 cd12143, SH3_ARHGAP9, Src Homology 3 domain of Rho
GTPase-activating protein 9 and similar proteins. Rho
GTPase-activating proteins (RhoGAPs or ARHGAPs) bind to
Rho proteins and enhance the hydrolysis rates of bound
GTP. ARHGAP9 functions as a GAP for Rac and Cdc42, but
not for RhoA. It negatively regulates cell migration and
adhesion. It also acts as a docking protein for the MAP
kinases Erk2 and p38alpha, and may facilitate cross-talk
between the Rho GTPase and MAPK pathways to control
actin remodeling. It contains SH3, WW, Pleckstin
homology (PH), and RhoGAP domains. 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 = 57
Score = 26.8 bits (59), Expect = 2.8
Identities = 6/26 (23%), Positives = 14/26 (53%)
Query: 94 GDILQIISKDDHNWWQARKDNVAGSA 119
G+ ++ K + +WWQ R+ ++
Sbjct: 23 GERFLLLRKTNSDWWQVRRLEAPSTS 48
>gnl|CDD|213011 cd12078, SH3_Tks4_3, Third 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 third 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 = 53
Score = 26.6 bits (58), Expect = 3.0
Identities = 11/32 (34%), Positives = 19/32 (59%)
Query: 88 GIAFQIGDILQIISKDDHNWWQARKDNVAGSA 119
GI+FQ G +++I K+ WW + ++ G A
Sbjct: 15 GISFQAGLKVEVIEKNLSGWWYIQIEDKEGWA 46
>gnl|CDD|219345 pfam07243, Phlebovirus_G1, Phlebovirus glycoprotein G1. This
family consists of several Phlebovirus glycoprotein G1
sequences. Members of the Bunyaviridae family acquire an
envelope by budding through the lipid bilayer of the
Golgi complex. The budding compartment is thought to be
determined by the accumulation of the two heterodimeric
membrane glycoproteins G1 and G2 in the Golgi.
Length = 527
Score = 29.4 bits (66), Expect = 3.6
Identities = 20/89 (22%), Positives = 35/89 (39%), Gaps = 9/89 (10%)
Query: 140 TKHEQVNCSIFGRKKKLYKDKYLAKHNAVFDQLDLVTYEEV---------VKLPSFKRKT 190
T E V +F K K+Y ++ ++ V ++ V YE KL S K ++
Sbjct: 180 TNFEVVPFIVFKNKGKMYIEQMKLRNREVLNEDSFVCYEHKGQDSSSGSHRKLKSVKVES 239
Query: 191 LVLLGAHGVGRRHIKNTLINKFPDKYAYP 219
+ + +K+P + AYP
Sbjct: 240 CKGVDTSSAKKCSGDEYFCSKYPCETAYP 268
>gnl|CDD|216137 pfam00822, PMP22_Claudin, PMP-22/EMP/MP20/Claudin family.
Length = 161
Score = 28.5 bits (64), Expect = 3.7
Identities = 18/65 (27%), Positives = 25/65 (38%), Gaps = 12/65 (18%)
Query: 87 AGIAFQIGD-ILQIISKDDHNWWQARKDNVAGSAGLIPSPELQEWRTACSTIDKTKHEQV 145
I I IL ++ W +R A SAGL WR C+T T Q+
Sbjct: 7 GFIVSHIAWVILLFVATIPDQWKVSRYVGAAASAGL--------WRN-CTTQSCTG--QI 55
Query: 146 NCSIF 150
+C +
Sbjct: 56 SCKVL 60
>gnl|CDD|234988 PRK01889, PRK01889, GTPase RsgA; Reviewed.
Length = 356
Score = 29.1 bits (66), Expect = 3.8
Identities = 12/24 (50%), Positives = 16/24 (66%), Gaps = 4/24 (16%)
Query: 187 KRKTLVLLGAHGVGRRHIKNTLIN 210
KT+ LLG+ GVG K+TL+N
Sbjct: 194 GGKTVALLGSSGVG----KSTLVN 213
>gnl|CDD|217416 pfam03193, DUF258, Protein of unknown function, DUF258.
Length = 161
Score = 27.9 bits (63), Expect = 4.8
Identities = 14/29 (48%), Positives = 16/29 (55%), Gaps = 4/29 (13%)
Query: 183 LPSFKRKTLVLLGAHGVGRRHIKNTLINK 211
P K KT VL G GVG K+TL+N
Sbjct: 30 KPLLKGKTSVLAGQSGVG----KSTLLNA 54
>gnl|CDD|212743 cd11809, SH3_srGAP, Src homology 3 domain of Slit-Robo GTPase
Activating Proteins. Slit-Robo GTPase Activating
Proteins (srGAPs) are Rho GAPs that interact with Robo1,
the transmembrane receptor of Slit proteins. Slit
proteins are secreted proteins that control axon
guidance and the migration of neurons and leukocytes.
Vertebrates contain three isoforms of srGAPs (srGAP1-3),
all of which are expressed during embryonic and early
development in the nervous system but with different
localization and timing. A fourth member has also been
reported (srGAP4, also called ARHGAP4). srGAPs contain
an N-terminal F-BAR domain, a Rho GAP domain, and a
C-terminal SH3 domain. SH3 domains are protein
interaction domains that bind to proline-rich ligands
with moderate affinity and selectivity, preferentially
to PxxP motifs. They play versatile and diverse roles in
the cell including the regulation of enzymes, changing
the subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 53
Score = 26.2 bits (58), Expect = 4.9
Identities = 10/35 (28%), Positives = 19/35 (54%), Gaps = 3/35 (8%)
Query: 89 IAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIP 123
++F+ GD L + + +WW+ + G GL+P
Sbjct: 16 LSFKKGDSLTLYRQVSDDWWRGQL---NGQDGLVP 47
>gnl|CDD|224084 COG1162, COG1162, Predicted GTPases [General function prediction
only].
Length = 301
Score = 28.4 bits (64), Expect = 5.0
Identities = 13/29 (44%), Positives = 14/29 (48%), Gaps = 4/29 (13%)
Query: 184 PSFKRKTLVLLGAHGVGRRHIKNTLINKF 212
K VLLG GVG K+TLIN
Sbjct: 160 ELLAGKITVLLGQSGVG----KSTLINAL 184
>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 = 26.2 bits (58), Expect = 5.1
Identities = 16/61 (26%), Positives = 28/61 (45%), Gaps = 12/61 (19%)
Query: 69 RAQFNYNPLD-DDLIPCAQAGIAFQIGDILQIISKDDHNWWQARKDNVAGSAGLIPSPEL 127
+A +NY + DL +F+ GDI+ + + D NW+ + G G P+ +
Sbjct: 3 KALYNYEGKEPGDL--------SFKKGDIILLRKRIDENWYHGECN---GKQGFFPASYV 51
Query: 128 Q 128
Q
Sbjct: 52 Q 52
>gnl|CDD|212865 cd11932, SH3_SH3RF2_2, Second Src Homology 3 domain of SH3 domain
containing ring finger 2. SH3RF2 is also called POSHER
(POSH-eliminating RING protein) or HEPP1 (heart protein
phosphatase 1-binding protein). It acts as an
anti-apoptotic regulator of the JNK pathway by binding
to and promoting the degradation of SH3RF1 (or POSH), a
scaffold protein that is required for pro-apoptotic JNK
activation. It may also play a role in cardiac functions
together with protein phosphatase 1. SH3RF2 contains an
N-terminal RING finger domain and three SH3 domains.
This model represents the second SH3 domain, located
C-terminal of the first SH3 domain at the N-terminal
half, of SH3RF2. SH3 domains are protein interaction
domains that bind to proline-rich ligands with moderate
affinity and selectivity, preferentially to PxxP motifs.
They play versatile and diverse roles in the cell
including the regulation of enzymes, changing the
subcellular localization of signaling pathway
components, and mediating the formation of multiprotein
complex assemblies.
Length = 57
Score = 26.0 bits (57), Expect = 5.7
Identities = 9/23 (39%), Positives = 15/23 (65%)
Query: 89 IAFQIGDILQIISKDDHNWWQAR 111
+ FQ DI+ +IS+ D NW + +
Sbjct: 22 LKFQKDDIITVISRVDENWAEGK 44
>gnl|CDD|223456 COG0379, NadA, Quinolinate synthase [Coenzyme metabolism].
Length = 324
Score = 28.4 bits (64), Expect = 6.8
Identities = 12/32 (37%), Positives = 15/32 (46%)
Query: 202 RHIKNTLINKFPDKYAYPVPQFITVCSVMFQI 233
R I + L + PDK P+P VC M I
Sbjct: 254 RGIVHRLQKEAPDKEFIPLPTAGAVCPTMKMI 285
>gnl|CDD|218134 pfam04535, DUF588, Domain of unknown function (DUF588). This
family of plant proteins contains a domain that may have
a catalytic activity. It has a conserved arginine and
aspartate that could form an active site. These proteins
are predicted to contain 3 or 4 transmembrane helices.
Length = 150
Score = 27.7 bits (62), Expect = 6.8
Identities = 10/42 (23%), Positives = 15/42 (35%), Gaps = 4/42 (9%)
Query: 278 QGIYSSFSLPFSVYRRDTTRSPRSDEENGRAYYFISHDEMMS 319
YS L SVY + G A+ D++M+
Sbjct: 60 AAGYSLLQLVLSVYLLSRKKPRTK----GLAWLLFILDQVMA 97
>gnl|CDD|221553 pfam12376, DUF3654, Protein of unknown function (DUF3654). This
family of proteins is found in eukaryotes. Proteins in
this family are typically between 193 and 612 amino
acids in length.
Length = 137
Score = 27.3 bits (61), Expect = 6.9
Identities = 16/51 (31%), Positives = 26/51 (50%), Gaps = 11/51 (21%)
Query: 301 SDEENGRAYYFISHDEMMSDIAANQYLEYGKSILTHPSQRHIVSCRKLVVN 351
S+EE + +EM++ I EYG+S+ T Q IV +K+V +
Sbjct: 9 SEEEKKK------EEEMLNKI-----KEYGESLCTKEKQEEIVEAQKIVCD 48
>gnl|CDD|206747 cd01854, YjeQ_EngC, Ribosomal interacting GTPase YjeQ/EngC, a
circularly permuted subfamily of the Ras GTPases. YjeQ
(YloQ in Bacillus subtilis) is a ribosomal small
subunit-dependent GTPase; hence also known as RsgA. YjeQ
is a late-stage ribosomal biogenesis factor involved in
the 30S subunit maturation, and it represents a protein
family whose members are broadly conserved in bacteria
and have been shown to be essential to the growth of E.
coli and B. subtilis. Proteins of the YjeQ family
contain all sequence motifs typical of the vast class of
P-loop-containing GTPases, but show a circular
permutation, with a G4-G1-G3 pattern of motifs as
opposed to the regular G1-G3-G4 pattern seen in most
GTPases. All YjeQ family proteins display a unique
domain architecture, which includes an N-terminal
OB-fold RNA-binding domain, the central permuted GTPase
domain, and a zinc knuckle-like C-terminal cysteine
domain.
Length = 211
Score = 27.7 bits (63), Expect = 6.9
Identities = 13/25 (52%), Positives = 16/25 (64%), Gaps = 4/25 (16%)
Query: 186 FKRKTLVLLGAHGVGRRHIKNTLIN 210
K KT VL+G GVG K+TL+N
Sbjct: 83 LKGKTSVLVGQSGVG----KSTLLN 103
>gnl|CDD|224536 COG1621, SacC, Beta-fructosidases (levanase/invertase)
[Carbohydrate transport and metabolism].
Length = 486
Score = 28.5 bits (64), Expect = 6.9
Identities = 8/37 (21%), Positives = 20/37 (54%), Gaps = 3/37 (8%)
Query: 98 QIISKDDHNWWQ---ARKDNVAGSAGLIPSPELQEWR 131
+++ + WW A+ +++ G+ L S +L+ W+
Sbjct: 166 KVVWDEGGKWWMMLGAQGEDLKGTILLYESDDLKNWQ 202
Score = 28.5 bits (64), Expect = 6.9
Identities = 8/37 (21%), Positives = 20/37 (54%), Gaps = 3/37 (8%)
Query: 232 QIISKDDHNWWQ---ARKDNVAGSAGLIPSPELQEWR 265
+++ + WW A+ +++ G+ L S +L+ W+
Sbjct: 166 KVVWDEGGKWWMMLGAQGEDLKGTILLYESDDLKNWQ 202
>gnl|CDD|190848 pfam04056, Ssl1, Ssl1-like. Ssl1-like proteins are 40kDa subunits
of the Transcription factor II H complex.
Length = 193
Score = 27.4 bits (61), Expect = 8.8
Identities = 12/30 (40%), Positives = 18/30 (60%)
Query: 135 STIDKTKHEQVNCSIFGRKKKLYKDKYLAK 164
STID K E++ CS+ G +++ K L K
Sbjct: 121 STIDTLKKEKIRCSVIGLSAEVFICKELCK 150
>gnl|CDD|237254 PRK12899, secA, preprotein translocase subunit SecA; Reviewed.
Length = 970
Score = 28.3 bits (63), Expect = 9.0
Identities = 12/29 (41%), Positives = 18/29 (62%)
Query: 291 YRRDTTRSPRSDEENGRAYYFISHDEMMS 319
Y RD + + R +E+ GR +YF DE+ S
Sbjct: 198 YLRDNSIATRKEEQVGRGFYFAIIDEVDS 226
Database: CDD.v3.10
Posted date: Mar 20, 2013 7:55 AM
Number of letters in database: 10,937,602
Number of sequences in database: 44,354
Lambda K H
0.322 0.137 0.421
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: 18,264,945
Number of extensions: 1767495
Number of successful extensions: 1588
Number of sequences better than 10.0: 1
Number of HSP's gapped: 1569
Number of HSP's successfully gapped: 206
Length of query: 352
Length of database: 10,937,602
Length adjustment: 98
Effective length of query: 254
Effective length of database: 6,590,910
Effective search space: 1674091140
Effective search space used: 1674091140
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.4 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.9 bits)
S2: 59 (26.3 bits)