RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy11037
(129 letters)
>gnl|CDD|176049 cd08404, C2B_Synaptotagmin-4, C2 domain second repeat present in
Synaptotagmin 4. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Synaptotagmin 4, a member of
class 4 synaptotagmins, is located in the brain. It
functions are unknown. It, like synaptotagmin-11, has an
Asp to Ser substitution in its C2A domain. Previously
all synaptotagmins were thought to be calcium sensors in
the regulation of neurotransmitter release and hormone
secretion, but it has been shown that not all of them
bind calcium. Of the 17 identified synaptotagmins only
8 bind calcium (1-3, 5-7, 9, 10). The function of the
two C2 domains that bind calcium are: regulating the
fusion step of synaptic vesicle exocytosis (C2A) and
binding to phosphatidyl-inositol-3,4,5-triphosphate
(PIP3) in the absence of calcium ions and to
phosphatidylinositol bisphosphate (PIP2) in their
presence (C2B). C2B also regulates also the recycling
step of synaptic vesicles. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 136
Score = 191 bits (487), Expect = 3e-64
Identities = 70/99 (70%), Positives = 87/99 (87%)
Query: 30 RGEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKK 89
RGE+LLSLC+QP NR T+VVLKAR+LPKMDV+GLADPYVKV L Y +R++KKKTHVKK
Sbjct: 1 RGELLLSLCYQPTTNRLTVVVLKARHLPKMDVSGLADPYVKVNLYYGKKRISKKKTHVKK 60
Query: 90 RTLNPVYNESFVFEVPADNLDSVSLELLLLDWDRVTKNE 128
TLNPV+NESFVF++P++ L+ +S+E L+LD DRVTKNE
Sbjct: 61 CTLNPVFNESFVFDIPSEELEDISVEFLVLDSDRVTKNE 99
>gnl|CDD|175975 cd00276, C2B_Synaptotagmin, C2 domain second repeat present in
Synaptotagmin. Synaptotagmin is a membrane-trafficking
protein characterized by a N-terminal transmembrane
region, a linker, and 2 C-terminal C2 domains. There are
several classes of Synaptotagmins. Previously all
synaptotagmins were thought to be calcium sensors in the
regulation of neurotransmitter release and hormone
secretion, but it has been shown that not all of them
bind calcium. Of the 17 identified synaptotagmins only
8 bind calcium (1-3, 5-7, 9, 10). The function of the
two C2 domains that bind calcium are: regulating the
fusion step of synaptic vesicle exocytosis (C2A) and
binding to phosphatidyl-inositol-3,4,5-triphosphate
(PIP3) in the absence of calcium ions and to
phosphatidylinositol bisphosphate (PIP2) in their
presence (C2B). C2B also regulates also the recycling
step of synaptic vesicles. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 134
Score = 146 bits (370), Expect = 2e-46
Identities = 59/98 (60%), Positives = 75/98 (76%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKR 90
GE+LLSL + P A R T+VVLKARNLP D GL+DPYVKV LL G+++ KKKT VKK
Sbjct: 1 GELLLSLSYLPTAERLTVVVLKARNLPPSDGKGLSDPYVKVSLLQGGKKLKKKKTSVKKG 60
Query: 91 TLNPVYNESFVFEVPADNLDSVSLELLLLDWDRVTKNE 128
TLNPV+NE+F F+VPA+ L+ VSL + ++D D V +NE
Sbjct: 61 TLNPVFNEAFSFDVPAEQLEEVSLVITVVDKDSVGRNE 98
>gnl|CDD|176050 cd08405, C2B_Synaptotagmin-7, C2 domain second repeat present in
Synaptotagmin 7. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Synaptotagmin 7, a member of
class 2 synaptotagmins, is located in presynaptic plasma
membranes in neurons, dense-core vesicles in endocrine
cells, and lysosomes in fibroblasts. It has been shown
to play a role in regulation of Ca2+-dependent lysosomal
exocytosis in fibroblasts and may also function as a
vesicular Ca2+-sensor. It is distinguished from the
other synaptotagmins by having over 12 splice forms.
Previously all synaptotagmins were thought to be calcium
sensors in the regulation of neurotransmitter release
and hormone secretion, but it has been shown that not
all of them bind calcium. Of the 17 identified
synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10).
The function of the two C2 domains that bind calcium
are: regulating the fusion step of synaptic vesicle
exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 136
Score = 145 bits (367), Expect = 5e-46
Identities = 56/99 (56%), Positives = 79/99 (79%)
Query: 30 RGEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKK 89
RGE+LLSLC+ P ANR T+ ++KARNL MD+ G +DPYVKV+L+YK +RV KKKT +KK
Sbjct: 1 RGELLLSLCYNPTANRITVNIIKARNLKAMDINGTSDPYVKVWLMYKDKRVEKKKTVIKK 60
Query: 90 RTLNPVYNESFVFEVPADNLDSVSLELLLLDWDRVTKNE 128
RTLNPV+NESF+F +P + L +L + ++D DR+++N+
Sbjct: 61 RTLNPVFNESFIFNIPLERLRETTLIITVMDKDRLSRND 99
>gnl|CDD|176048 cd08403, C2B_Synaptotagmin-3-5-6-9-10, C2 domain second repeat
present in Synaptotagmins 3, 5, 6, 9, and 10.
Synaptotagmin is a membrane-trafficking protein
characterized by a N-terminal transmembrane region, a
linker, and 2 C-terminal C2 domains. Synaptotagmin 3, a
member of class 3 synaptotagmins, is located in the
brain and localized to the active zone and plasma
membrane. It functions as a Ca2+ sensor for fast
exocytosis. It, along with synaptotagmins 5,6, and 10,
has disulfide bonds at its N-terminus. Synaptotagmin 9,
a class 5 synaptotagmins, is located in the brain and
localized to the synaptic vesicles. It is thought to be
a Ca2+-sensor for dense-core vesicle exocytosis.
Previously all synaptotagmins were thought to be calcium
sensors in the regulation of neurotransmitter release
and hormone secretion, but it has been shown that not
all of them bind calcium. Of the 17 identified
synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10).
The function of the two C2 domains that bind calcium
are: regulating the fusion step of synaptic vesicle
exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 134
Score = 136 bits (345), Expect = 1e-42
Identities = 56/98 (57%), Positives = 77/98 (78%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKR 90
GE++ SLC+ P A R T+ ++KARNL MD+TG +DPYVKV L+ +G+R+ KKKT VKK
Sbjct: 1 GELMFSLCYLPTAGRLTLTIIKARNLKAMDITGFSDPYVKVSLMCEGRRLKKKKTSVKKN 60
Query: 91 TLNPVYNESFVFEVPADNLDSVSLELLLLDWDRVTKNE 128
TLNP YNE+ VF+VP +N+D+VSL + ++D+DRV NE
Sbjct: 61 TLNPTYNEALVFDVPPENVDNVSLIIAVVDYDRVGHNE 98
>gnl|CDD|176047 cd08402, C2B_Synaptotagmin-1, C2 domain second repeat present in
Synaptotagmin 1. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Synaptotagmin 1, a member of the
class 1 synaptotagmins, is located in the brain and
endocranium and localized to the synaptic vesicles and
secretory granules. It functions as a Ca2+ sensor for
fast exocytosis. It, like synaptotagmin-2, has an
N-glycosylated N-terminus. Synaptotagmin 4, a member of
class 4 synaptotagmins, is located in the brain. It
functions are unknown. It, like synaptotagmin-11, has an
Asp to Ser substitution in its C2A domain. Previously
all synaptotagmins were thought to be calcium sensors in
the regulation of neurotransmitter release and hormone
secretion, but it has been shown that not all of them
bind calcium. Of the 17 identified synaptotagmins only
8 bind calcium (1-3, 5-7, 9, 10). The function of the
two C2 domains that bind calcium are: regulating the
fusion step of synaptic vesicle exocytosis (C2A) and
binding to phosphatidyl-inositol-3,4,5-triphosphate
(PIP3) in the absence of calcium ions and to
phosphatidylinositol bisphosphate (PIP2) in their
presence (C2B). C2B also regulates also the recycling
step of synaptic vesicles. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 136
Score = 134 bits (338), Expect = 1e-41
Identities = 54/99 (54%), Positives = 75/99 (75%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKR 90
G+I SL + P A + T+V+L+A+NL KMDV GL+DPYVK++L+ G+R+ KKKT +KKR
Sbjct: 2 GDICFSLRYVPTAGKLTVVILEAKNLKKMDVGGLSDPYVKIHLMQNGKRLKKKKTTIKKR 61
Query: 91 TLNPVYNESFVFEVPADNLDSVSLELLLLDWDRVTKNEA 129
TLNP YNESF FEVP + + V L + +LD+DR+ KN+
Sbjct: 62 TLNPYYNESFSFEVPFEQIQKVHLIVTVLDYDRIGKNDP 100
>gnl|CDD|175992 cd04026, C2_PKC_alpha_gamma, C2 domain in Protein Kinase C (PKC)
alpha and gamma. A single C2 domain is found in PKC
alpha and gamma. The PKC family of serine/threonine
kinases regulates apoptosis, proliferation, migration,
motility, chemo-resistance, and differentiation. There
are 3 groups: group 1(alpha, betaI, beta II, gamma)
which require phospholipids and calcium, group 2 (delta,
epsilon, theta, eta) which do not require calcium for
activation, and group 3 (xi, iota/lambda) which are
atypical and can be activated in the absence of
diacylglycerol and calcium. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members here have a type-I
topology.
Length = 131
Score = 104 bits (261), Expect = 7e-30
Identities = 44/100 (44%), Positives = 65/100 (65%), Gaps = 5/100 (5%)
Query: 30 RGEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKK 89
RG I L + + N+ T+ V +A+NL MD GL+DPYVK+ L+ + K+KT K
Sbjct: 1 RGRIYLKISVK--DNKLTVEVREAKNLIPMDPNGLSDPYVKLKLIPDPKNETKQKTKTIK 58
Query: 90 RTLNPVYNESFVFEV-PADNLDSVSLELLLLDWDRVTKNE 128
+TLNPV+NE+F F++ PAD +S+E + DWDR T+N+
Sbjct: 59 KTLNPVWNETFTFDLKPADKDRRLSIE--VWDWDRTTRND 96
>gnl|CDD|176051 cd08406, C2B_Synaptotagmin-12, C2 domain second repeat present in
Synaptotagmin 12. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Synaptotagmin 12, a member of
class 6 synaptotagmins, is located in the brain. It
functions are unknown. It, like synaptotagmins 8 and 13,
do not have any consensus Ca2+ binding sites. Previously
all synaptotagmins were thought to be calcium sensors in
the regulation of neurotransmitter release and hormone
secretion, but it has been shown that not all of them
bind calcium. Of the 17 identified synaptotagmins only
8 bind calcium (1-3, 5-7, 9, 10). The function of the
two C2 domains that bind calcium are: regulating the
fusion step of synaptic vesicle exocytosis (C2A) and
binding to phosphatidyl-inositol-3,4,5-triphosphate
(PIP3) in the absence of calcium ions and to
phosphatidylinositol bisphosphate (PIP2) in their
presence (C2B). C2B also regulates also the recycling
step of synaptic vesicles. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 136
Score = 100 bits (251), Expect = 2e-28
Identities = 45/86 (52%), Positives = 61/86 (70%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKR 90
GEILLSL + P A R T+VV+KARNL + ADP+VKVYLL G++++KKKT VK+
Sbjct: 2 GEILLSLSYLPTAERLTVVVVKARNLVWDNGKTTADPFVKVYLLQDGRKISKKKTSVKRD 61
Query: 91 TLNPVYNESFVFEVPADNLDSVSLEL 116
NP++NE+ +F VPA L +SL +
Sbjct: 62 DTNPIFNEAMIFSVPAIVLQDLSLRV 87
>gnl|CDD|215765 pfam00168, C2, C2 domain.
Length = 85
Score = 97.3 bits (243), Expect = 9e-28
Identities = 38/82 (46%), Positives = 51/82 (62%), Gaps = 4/82 (4%)
Query: 47 TIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPA 106
+ V+ A+NLP D+ G +DPYVKV L GQ+ KKT V K TLNPV+NE+F FEV
Sbjct: 2 RVTVISAKNLPPKDLNGKSDPYVKVSLG--GQKKDTKKTKVVKNTLNPVWNETFTFEVTL 59
Query: 107 DNLDSVSLELLLLDWDRVTKNE 128
L L + + D+DR K++
Sbjct: 60 PELA--ELRIEVYDYDRFGKDD 79
>gnl|CDD|175996 cd04030, C2C_KIAA1228, C2 domain third repeat present in
uncharacterized human KIAA1228-like proteins. KIAA
proteins are uncharacterized human proteins. They were
compiled by the Kazusa mammalian cDNA project which
identified more than 2000 human genes. They are
identified by 4 digit codes that precede the KIAA
designation. Many KIAA genes are still functionally
uncharacterized including KIAA1228. C2 domains fold into
an 8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the third C2
repeat, C2C, and has a type-II topology.
Length = 127
Score = 89.6 bits (223), Expect = 3e-24
Identities = 32/88 (36%), Positives = 51/88 (57%)
Query: 29 GRGEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVK 88
G I L++ + + + V K RNLP D + + DPYV++YLL + ++KT VK
Sbjct: 1 PLGRIQLTIRYSSQRQKLIVTVHKCRNLPPCDSSDIPDPYVRLYLLPDKSKSTRRKTSVK 60
Query: 89 KRTLNPVYNESFVFEVPADNLDSVSLEL 116
K LNPV++E+F F V + L +L++
Sbjct: 61 KDNLNPVFDETFEFPVSLEELKRRTLDV 88
>gnl|CDD|176031 cd08385, C2A_Synaptotagmin-1-5-6-9-10, C2A domain first repeat
present in Synaptotagmins 1, 5, 6, 9, and 10.
Synaptotagmin is a membrane-trafficking protein
characterized by a N-terminal transmembrane region, a
linker, and 2 C-terminal C2 domains. Synaptotagmin 1, a
member of class 1 synaptotagmins, is located in the
brain and endocranium and localized to the synaptic
vesicles and secretory granules. It functions as a Ca2+
sensor for fast exocytosis as do synaptotagmins 5, 6,
and 10. It is distinguished from the other
synaptotagmins by having an N-glycosylated N-terminus.
Synaptotagmins 5, 6, and 10, members of class 3
synaptotagmins, are located primarily in the brain and
localized to the active zone and plasma membrane. They
is distinguished from the other synaptotagmins by having
disulfide bonds at its N-terminus. Synaptotagmin 6 also
regulates the acrosome reaction, a unique Ca2+-regulated
exocytosis, in sperm. Synaptotagmin 9, a class 5
synaptotagmins, is located in the brain and localized to
the synaptic vesicles. It is thought to be a
Ca2+-sensor for dense-core vesicle exocytosis.
Previously all synaptotagmins were thought to be calcium
sensors in the regulation of neurotransmitter release
and hormone secretion, but it has been shown that not
all of them bind calcium. Of the 17 identified
synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10).
The function of the two C2 domains that bind calcium
are: regulating the fusion step of synaptic vesicle
exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 124
Score = 86.6 bits (215), Expect = 5e-23
Identities = 40/97 (41%), Positives = 64/97 (65%), Gaps = 2/97 (2%)
Query: 30 RGEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKK 89
G++ SL + +N+ T+ +++A +LP MD+ G +DPYVKVYLL + K +T V +
Sbjct: 2 LGKLQFSLDYDFQSNQLTVGIIQAADLPAMDMGGTSDPYVKVYLL--PDKKKKFETKVHR 59
Query: 90 RTLNPVYNESFVFEVPADNLDSVSLELLLLDWDRVTK 126
+TLNPV+NE+F F+VP L + +L + D+DR +K
Sbjct: 60 KTLNPVFNETFTFKVPYSELGNKTLVFSVYDFDRFSK 96
>gnl|CDD|176033 cd08387, C2A_Synaptotagmin-8, C2A domain first repeat present in
Synaptotagmin 8. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Previously all synaptotagmins
were thought to be calcium sensors in the regulation of
neurotransmitter release and hormone secretion, but it
has been shown that not all of them bind calcium. Of
the 17 identified synaptotagmins only 8 bind calcium
(1-3, 5-7, 9, 10). The function of the two C2 domains
that bind calcium are: regulating the fusion step of
synaptic vesicle exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 124
Score = 86.3 bits (214), Expect = 6e-23
Identities = 41/99 (41%), Positives = 61/99 (61%), Gaps = 2/99 (2%)
Query: 30 RGEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKK 89
RGE+ SL + + +++ARNL D +G ADPY KV LL K++ + K
Sbjct: 2 RGELHFSLEYDKDMGILNVKLIQARNLQPRDFSGTADPYCKVRLLPDRSNT--KQSKIHK 59
Query: 90 RTLNPVYNESFVFEVPADNLDSVSLELLLLDWDRVTKNE 128
+TLNP ++ESFVFEVP L +LE+LL D+D+ +++E
Sbjct: 60 KTLNPEFDESFVFEVPPQELPKRTLEVLLYDFDQFSRDE 98
>gnl|CDD|214577 smart00239, C2, Protein kinase C conserved region 2 (CalB).
Ca2+-binding motif present in phospholipases, protein
kinases C, and synaptotagmins (among others). Some do
not appear to contain Ca2+-binding sites. Particular C2s
appear to bind phospholipids, inositol polyphosphates,
and intracellular proteins. Unusual occurrence in
perforin. Synaptotagmin and PLC C2s are permuted in
sequence with respect to N- and C-terminal beta strands.
SMART detects C2 domains using one or both of two
profiles.
Length = 101
Score = 85.2 bits (211), Expect = 7e-23
Identities = 39/84 (46%), Positives = 51/84 (60%), Gaps = 4/84 (4%)
Query: 45 RFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEV 104
T+ ++ ARNLP D G +DPYVKV L G KKKT V K TLNPV+NE+F FEV
Sbjct: 1 TLTVKIISARNLPPKDKGGKSDPYVKVSLD--GDPKEKKKTKVVKNTLNPVWNETFEFEV 58
Query: 105 PADNLDSVSLELLLLDWDRVTKNE 128
P L + +E + D DR +++
Sbjct: 59 PPPELAELEIE--VYDKDRFGRDD 80
>gnl|CDD|175973 cd00030, C2, C2 domain. The C2 domain was first identified in PKC.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 102
Score = 83.7 bits (207), Expect = 4e-22
Identities = 37/83 (44%), Positives = 52/83 (62%), Gaps = 6/83 (7%)
Query: 46 FTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVP 105
+ V++ARNLP D+ G +DPYVKV L K K KT V K TLNPV+NE+F F V
Sbjct: 1 LRVTVIEARNLPAKDLNGKSDPYVKVSLGGK----QKFKTKVVKNTLNPVWNETFEFPVL 56
Query: 106 ADNLDSVSLELLLLDWDRVTKNE 128
+ +S +L + + D DR +K++
Sbjct: 57 --DPESDTLTVEVWDKDRFSKDD 77
>gnl|CDD|176030 cd08384, C2B_Rabphilin_Doc2, C2 domain second repeat present in
Rabphilin and Double C2 domain. Rabphilin is found
neurons and in neuroendrocrine cells, while Doc2 is
found not only in the brain but in tissues, including
mast cells, chromaffin cells, and osteoblasts.
Rabphilin and Doc2s share highly homologous tandem C2
domains, although their N-terminal structures are
completely different: rabphilin contains an N-terminal
Rab-binding domain (RBD),7 whereas Doc2 contains an
N-terminal Munc13-1-interacting domain (MID). C2 domains
fold into an 8-standed beta-sandwich that can adopt 2
structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 133
Score = 83.6 bits (207), Expect = 8e-22
Identities = 34/96 (35%), Positives = 55/96 (57%)
Query: 33 ILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTL 92
IL+SL + + +++ NL MD G +DP+VK+YL + +K KT VKK+TL
Sbjct: 2 ILVSLMYNTQRRGLIVGIIRCVNLAAMDANGYSDPFVKLYLKPDAGKKSKHKTQVKKKTL 61
Query: 93 NPVYNESFVFEVPADNLDSVSLELLLLDWDRVTKNE 128
NP +NE F +++ +L +LE+ + D D N+
Sbjct: 62 NPEFNEEFFYDIKHSDLAKKTLEITVWDKDIGKSND 97
>gnl|CDD|176054 cd08409, C2B_Synaptotagmin-15, C2 domain second repeat present in
Synaptotagmin 15. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. It is thought to be involved in
the trafficking and exocytosis of secretory vesicles in
non-neuronal tissues and is Ca2+ independent. Human
synaptotagmin 15 has 2 alternatively spliced forms that
encode proteins with different C-termini. The larger,
SYT15a, contains a N-terminal TM region, a putative
fatty-acylation site, and 2 tandem C terminal C2
domains. The smaller, SYT15b, lacks the C-terminal
portion of the second C2 domain. Unlike most other
synaptotagmins it is nearly absent in the brain and
rather is found in the heart, lungs, skeletal muscle,
and testis. Previously all synaptotagmins were thought
to be calcium sensors in the regulation of
neurotransmitter release and hormone secretion, but it
has been shown that not all of them bind calcium. Of
the 17 identified synaptotagmins only 8 bind calcium
(1-3, 5-7, 9, 10). The function of the two C2 domains
that bind calcium are: regulating the fusion step of
synaptic vesicle exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 137
Score = 83.5 bits (207), Expect = 8e-22
Identities = 37/90 (41%), Positives = 53/90 (58%), Gaps = 1/90 (1%)
Query: 30 RGEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKK 89
G+I +SL + P NR T+VVL+AR L ++D YVKV L+ + V KKT V
Sbjct: 1 LGDIQISLTYNPTLNRLTVVVLRARGLRQLDHAH-TSVYVKVSLMIHNKVVKTKKTEVVD 59
Query: 90 RTLNPVYNESFVFEVPADNLDSVSLELLLL 119
+P +NESF F+V + LD+ SL L ++
Sbjct: 60 GAASPSFNESFSFKVTSRQLDTASLSLSVM 89
>gnl|CDD|176055 cd08410, C2B_Synaptotagmin-17, C2 domain second repeat present in
Synaptotagmin 17. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Synaptotagmin 17 is located in
the brain, kidney, and prostate and is thought to be a
peripheral membrane protein. Previously all
synaptotagmins were thought to be calcium sensors in the
regulation of neurotransmitter release and hormone
secretion, but it has been shown that not all of them
bind calcium. Of the 17 identified synaptotagmins only
8 bind calcium (1-3, 5-7, 9, 10). The function of the
two C2 domains that bind calcium are: regulating the
fusion step of synaptic vesicle exocytosis (C2A) and
binding to phosphatidyl-inositol-3,4,5-triphosphate
(PIP3) in the absence of calcium ions and to
phosphatidylinositol bisphosphate (PIP2) in their
presence (C2B). C2B also regulates also the recycling
step of synaptic vesicles. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 135
Score = 82.6 bits (204), Expect = 2e-21
Identities = 37/99 (37%), Positives = 66/99 (66%), Gaps = 2/99 (2%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAK-KKTHVKK 89
GE+LLSL + P+A R + +++A+ L + D++ +DP+VK+ L++ G ++ K KKT +
Sbjct: 1 GELLLSLNYLPSAGRLNVDIIRAKQLLQTDMSQGSDPFVKIQLVH-GLKLIKTKKTSCMR 59
Query: 90 RTLNPVYNESFVFEVPADNLDSVSLELLLLDWDRVTKNE 128
T++P YNESF F+VP + L++VSL + + + N+
Sbjct: 60 GTIDPFYNESFSFKVPQEELENVSLVFTVYGHNVKSSND 98
>gnl|CDD|176032 cd08386, C2A_Synaptotagmin-7, C2A domain first repeat present in
Synaptotagmin 7. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Synaptotagmin 7, a member of
class 2 synaptotagmins, is located in presynaptic plasma
membranes in neurons, dense-core vesicles in endocrine
cells, and lysosomes in fibroblasts. It has been shown
to play a role in regulation of Ca2+-dependent lysosomal
exocytosis in fibroblasts and may also function as a
vesicular Ca2+-sensor. It is distinguished from the
other synaptotagmins by having over 12 splice forms.
Previously all synaptotagmins were thought to be calcium
sensors in the regulation of neurotransmitter release
and hormone secretion, but it has been shown that not
all of them bind calcium. Of the 17 identified
synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10).
The function of the two C2 domains that bind calcium
are: regulating the fusion step of synaptic vesicle
exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 125
Score = 81.2 bits (201), Expect = 5e-21
Identities = 39/100 (39%), Positives = 61/100 (61%), Gaps = 3/100 (3%)
Query: 30 RGEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKK 89
G I S+ + + T+ +LKA LP D +G +DP+VK+YLL + K +T VK+
Sbjct: 2 LGRIQFSVSYDFQESTLTLKILKAVELPAKDFSGTSDPFVKIYLLPDKKH--KLETKVKR 59
Query: 90 RTLNPVYNESFVFE-VPADNLDSVSLELLLLDWDRVTKNE 128
+ LNP +NE+F+FE P + L L L +LD+DR ++N+
Sbjct: 60 KNLNPHWNETFLFEGFPYEKLQQRVLYLQVLDYDRFSRND 99
>gnl|CDD|176036 cd08390, C2A_Synaptotagmin-15-17, C2A domain first repeat present
in Synaptotagmins 15 and 17. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. It is thought to be involved in
the trafficking and exocytosis of secretory vesicles in
non-neuronal tissues and is Ca2+ independent. Human
synaptotagmin 15 has 2 alternatively spliced forms that
encode proteins with different C-termini. The larger,
SYT15a, contains a N-terminal TM region, a putative
fatty-acylation site, and 2 tandem C terminal C2
domains. The smaller, SYT15b, lacks the C-terminal
portion of the second C2 domain. Unlike most other
synaptotagmins it is nearly absent in the brain and
rather is found in the heart, lungs, skeletal muscle,
and testis. Synaptotagmin 17 is located in the brain,
kidney, and prostate and is thought to be a peripheral
membrane protein. Previously all synaptotagmins were
thought to be calcium sensors in the regulation of
neurotransmitter release and hormone secretion, but it
has been shown that not all of them bind calcium. Of
the 17 identified synaptotagmins only 8 bind calcium
(1-3, 5-7, 9, 10). The function of the two C2 domains
that bind calcium are: regulating the fusion step of
synaptic vesicle exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 123
Score = 79.2 bits (196), Expect = 3e-20
Identities = 33/94 (35%), Positives = 52/94 (55%), Gaps = 3/94 (3%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMDVT-GLADPYVKVYLLYKGQRVAKKKTHVKK 89
G + S+ + + T+ ++KARNLP DP+VKV LL +R ++ VK+
Sbjct: 1 GRLWFSVQYDLEEEQLTVSLIKARNLPPRTKDVAHCDPFVKVCLLPDERRS--LQSKVKR 58
Query: 90 RTLNPVYNESFVFEVPADNLDSVSLELLLLDWDR 123
+T NP ++E+FVF+V L +L L + D DR
Sbjct: 59 KTQNPNFDETFVFQVSFKELQRRTLRLSVYDVDR 92
>gnl|CDD|175976 cd04009, C2B_Munc13-like, C2 domain second repeat in Munc13
(mammalian uncoordinated)-like proteins. C2-like
domains are thought to be involved in phospholipid
binding in a Ca2+ independent manner in both Unc13 and
Munc13. Caenorabditis elegans Unc13 has a central domain
with sequence similarity to PKC, which includes C1 and
C2-related domains. Unc13 binds phorbol esters and DAG
with high affinity in a phospholipid manner. Mutations
in Unc13 results in abnormal neuronal connections and
impairment in cholinergic neurotransmission in the
nematode. Munc13 is the mammalian homolog which are
expressed in the brain. There are 3 isoforms (Munc13-1,
-2, -3) and are thought to play a role in
neurotransmitter release and are hypothesized to be
high-affinity receptors for phorbol esters. Unc13 and
Munc13 contain both C1 and C2 domains. There are two C2
related domains present, one central and one at the
carboxyl end. Munc13-1 contains a third C2-like domain.
Munc13 interacts with syntaxin, synaptobrevin, and
synaptotagmin suggesting a role for these as scaffolding
proteins. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the third C2
repeat, C2C, and has a type-II topology.
Length = 133
Score = 79.2 bits (196), Expect = 4e-20
Identities = 33/95 (34%), Positives = 54/95 (56%), Gaps = 4/95 (4%)
Query: 38 CWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLL--YKGQRVAKKKTHVKKRTLNPV 95
++ + + +L ARNL +D G +DP+VKV LL + V KT VKK+TL P+
Sbjct: 10 YYRASEQSLRVEILNARNLLPLDSNGSSDPFVKVELLPRHLFPDVPTPKTQVKKKTLFPL 69
Query: 96 YNESFVFEVPAD--NLDSVSLELLLLDWDRVTKNE 128
++ESF F VP + +++ L + D+D + N+
Sbjct: 70 FDESFEFNVPPEQCSVEGALLLFTVKDYDLLGSND 104
>gnl|CDD|175997 cd04031, C2A_RIM1alpha, C2 domain first repeat contained in
Rab3-interacting molecule (RIM) proteins. RIMs are
believed to organize specialized sites of the plasma
membrane called active zones. They also play a role in
controlling neurotransmitter release, plasticity
processes, as well as memory and learning. RIM contains
an N-terminal zinc finger domain, a PDZ domain, and two
C-terminal C2 domains (C2A, C2B). C2 domains fold into
an 8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members here have a type-I
topology and do not bind Ca2+.
Length = 125
Score = 78.1 bits (193), Expect = 8e-20
Identities = 36/99 (36%), Positives = 59/99 (59%), Gaps = 1/99 (1%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKR 90
G I + L + ++ + VL+AR+LP D L +PYVKVYLL +K++T K+
Sbjct: 3 GRIQIQLWYDKVTSQLIVTVLQARDLPPRDDGSLRNPYVKVYLLPDRSEKSKRRTKTVKK 62
Query: 91 TLNPVYNESFVF-EVPADNLDSVSLELLLLDWDRVTKNE 128
TLNP +N++F + V + L +LE+ + D+DR +N+
Sbjct: 63 TLNPEWNQTFEYSNVRRETLKERTLEVTVWDYDRDGEND 101
>gnl|CDD|176005 cd04040, C2D_Tricalbin-like, C2 domain fourth repeat present in
Tricalbin-like proteins. 5 to 6 copies of the C2 domain
are present in Tricalbin, a yeast homolog of
Synaptotagmin, which is involved in membrane trafficking
and sorting. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the fifth C2
repeat, C2E, and has a type-II topology.
Length = 115
Score = 75.7 bits (187), Expect = 6e-19
Identities = 36/83 (43%), Positives = 50/83 (60%), Gaps = 6/83 (7%)
Query: 46 FTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVP 105
T+ V+ A NLP D G +DP+VK YL G++V K T K+TLNPV+NESF VP
Sbjct: 1 LTVDVISAENLPSADRNGKSDPFVKFYL--NGEKVFK--TKTIKKTLNPVWNESFEVPVP 56
Query: 106 ADNLDSVSLELLLLDWDRVTKNE 128
+ + +E + DWDR K++
Sbjct: 57 SRVRAVLKVE--VYDWDRGGKDD 77
>gnl|CDD|175987 cd04020, C2B_SLP_1-2-3-4, C2 domain second repeat present in
Synaptotagmin-like proteins 1-4. All Slp members
basically share an N-terminal Slp homology domain (SHD)
and C-terminal tandem C2 domains (named the C2A domain
and the C2B domain) with the SHD and C2 domains being
separated by a linker sequence of various length.
Slp1/JFC1 and Slp2/exophilin 4 promote granule docking
to the plasma membrane. Additionally, their C2A domains
are both Ca2+ independent, unlike the case in Slp3 and
Slp4/granuphilin in which their C2A domains are Ca2+
dependent. It is thought that SHD (except for the
Slp4-SHD) functions as a specific Rab27A/B-binding
domain. In addition to Slps, rabphilin, Noc2, and
Munc13-4 also function as Rab27-binding proteins. It has
been demonstrated that Slp3 and Slp4/granuphilin promote
dense-core vesicle exocytosis. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second
C2 repeat, C2B, and has a type-I topology.
Length = 162
Score = 77.0 bits (190), Expect = 7e-19
Identities = 36/112 (32%), Positives = 64/112 (57%), Gaps = 13/112 (11%)
Query: 30 RGEILLSLCWQPAANR------------FTIVVLKARNLPKMDVTGLADPYVKVYLLYKG 77
RGE+ ++L + P + + V +A+NLP + G +D +VK YLL
Sbjct: 1 RGELKVALKYVPPESEGALKSKKPSTGELHVWVKEAKNLPALKSGGTSDSFVKCYLLPDK 60
Query: 78 QRVAKKKTHVKKRTLNPVYNESFVFE-VPADNLDSVSLELLLLDWDRVTKNE 128
+ +K+KT V K+++NPV+N +FV++ V ++L LEL + D D+++ N+
Sbjct: 61 SKKSKQKTPVVKKSVNPVWNHTFVYDGVSPEDLSQACLELTVWDHDKLSSND 112
>gnl|CDD|176056 cd08521, C2A_SLP, C2 domain first repeat present in
Synaptotagmin-like proteins. All Slp members basically
share an N-terminal Slp homology domain (SHD) and
C-terminal tandem C2 domains (named the C2A domain and
the C2B domain) with the SHD and C2 domains being
separated by a linker sequence of various length.
Slp1/JFC1 and Slp2/exophilin 4 promote granule docking
to the plasma membrane. Additionally, their C2A domains
are both Ca2+ independent, unlike the case in Slp3 and
Slp4/granuphilin in which their C2A domains are Ca2+
dependent. It is thought that SHD (except for the
Slp4-SHD) functions as a specific Rab27A/B-binding
domain. In addition to Slps, rabphilin, Noc2, and
Munc13-4 also function as Rab27-binding proteins. It has
been demonstrated that Slp3 and Slp4/granuphilin promote
dense-core vesicle exocytosis. Slp5 mRNA has been shown
to be restricted to human placenta and liver suggesting
a role in Rab27A-dependent membrane trafficking in
specific tissues. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first
C2 repeat, C2A, and has a type-I topology.
Length = 123
Score = 75.4 bits (186), Expect = 1e-18
Identities = 32/87 (36%), Positives = 49/87 (56%), Gaps = 1/87 (1%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMDVT-GLADPYVKVYLLYKGQRVAKKKTHVKK 89
GEI SL + + + + RNL D ++PYVKVYLL + +K+KT VKK
Sbjct: 1 GEIEFSLSYNYKTGSLEVHIKECRNLAYADEKKKRSNPYVKVYLLPDKSKQSKRKTSVKK 60
Query: 90 RTLNPVYNESFVFEVPADNLDSVSLEL 116
T NPV+NE+ + + L++ +L+L
Sbjct: 61 NTTNPVFNETLKYHISKSQLETRTLQL 87
>gnl|CDD|176000 cd04035, C2A_Rabphilin_Doc2, C2 domain first repeat present in
Rabphilin and Double C2 domain. Rabphilin is found
neurons and in neuroendrocrine cells, while Doc2 is
found not only in the brain but in tissues, including
mast cells, chromaffin cells, and osteoblasts.
Rabphilin and Doc2s share highly homologous tandem C2
domains, although their N-terminal structures are
completely different: rabphilin contains an N-terminal
Rab-binding domain (RBD),7 whereas Doc2 contains an
N-terminal Munc13-1-interacting domain (MID). C2 domains
fold into an 8-standed beta-sandwich that can adopt 2
structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 123
Score = 75.0 bits (185), Expect = 1e-18
Identities = 31/95 (32%), Positives = 53/95 (55%), Gaps = 1/95 (1%)
Query: 30 RGEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKK 89
G + +L + PA + +++A+ L MD GL+DPYVK+ LL + K +T
Sbjct: 1 LGTLEFTLLYDPANSALHCTIIRAKGLKAMDANGLSDPYVKLNLLPGASKATKLRTKTVH 60
Query: 90 RTLNPVYNESFVFE-VPADNLDSVSLELLLLDWDR 123
+T NP +NE+ + + +++ +L LL+LD DR
Sbjct: 61 KTRNPEFNETLTYYGITEEDIQRKTLRLLVLDEDR 95
>gnl|CDD|176052 cd08407, C2B_Synaptotagmin-13, C2 domain second repeat present in
Synaptotagmin 13. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Synaptotagmin 13, a member of
class 6 synaptotagmins, is located in the brain. It
functions are unknown. It, like synaptotagmins 8 and 12,
does not have any consensus Ca2+ binding sites.
Previously all synaptotagmins were thought to be calcium
sensors in the regulation of neurotransmitter release
and hormone secretion, but it has been shown that not
all of them bind calcium. Of the 17 identified
synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10).
The function of the two C2 domains that bind calcium
are: regulating the fusion step of synaptic vesicle
exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 138
Score = 73.1 bits (179), Expect = 1e-17
Identities = 40/94 (42%), Positives = 62/94 (65%), Gaps = 2/94 (2%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMDVTGL--ADPYVKVYLLYKGQRVAKKKTHVK 88
GE+LLS+ + PAANR +VV+KA+NL + L D VKV L ++ ++ KK+T
Sbjct: 2 GEVLLSISYLPAANRLLVVVIKAKNLHSDQLKLLLGIDVSVKVTLKHQNAKLKKKQTKRA 61
Query: 89 KRTLNPVYNESFVFEVPADNLDSVSLELLLLDWD 122
K +NPV+NE +FE+P++ L + S+EL +L+ D
Sbjct: 62 KHKINPVWNEMIMFELPSELLAASSVELEVLNQD 95
>gnl|CDD|176039 cd08393, C2A_SLP-1_2, C2 domain first repeat present in
Synaptotagmin-like proteins 1 and 2. All Slp members
basically share an N-terminal Slp homology domain (SHD)
and C-terminal tandem C2 domains (named the C2A domain
and the C2B domain) with the SHD and C2 domains being
separated by a linker sequence of various length.
Slp1/JFC1 and Slp2/exophilin 4 promote granule docking
to the plasma membrane. Additionally, their C2A domains
are both Ca2+ independent, unlike Slp3 and
Slp4/granuphilin which are Ca2+ dependent. It is
thought that SHD (except for the Slp4-SHD) functions as
a specific Rab27A/B-binding domain. In addition to
Slps, rabphilin, Noc2, and Munc13-4 also function as
Rab27-binding proteins. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 125
Score = 70.2 bits (172), Expect = 1e-16
Identities = 33/99 (33%), Positives = 54/99 (54%), Gaps = 1/99 (1%)
Query: 30 RGEILLSLCWQPAANRFTIVVLKARNLPKMDV-TGLADPYVKVYLLYKGQRVAKKKTHVK 88
+G + +L + P + V++ ++L D +DPYVK YLL K+KT VK
Sbjct: 1 QGSVQFALDYDPKLRELHVHVIQCQDLAAADPKKQRSDPYVKTYLLPDKSNRGKRKTSVK 60
Query: 89 KRTLNPVYNESFVFEVPADNLDSVSLELLLLDWDRVTKN 127
K+TLNPV+NE+ ++V + L + L L + D + +N
Sbjct: 61 KKTLNPVFNETLRYKVEREELPTRVLNLSVWHRDSLGRN 99
>gnl|CDD|176027 cd08381, C2B_PI3K_class_II, C2 domain second repeat present in
class II phosphatidylinositol 3-kinases (PI3Ks). There
are 3 classes of PI3Ks based on structure, regulation,
and specificity. All classes contain a N-terminal C2
domain, a PIK domain, and a kinase catalytic domain.
Unlike class I and class III, class II PI3Ks have
additionally a PX domain and a C-terminal C2 domain
containing a nuclear localization signal both of which
bind phospholipids though in a slightly different
fashion. PI3Ks (AKA phosphatidylinositol (PtdIns)
3-kinases) regulate cell processes such as cell growth,
differentiation, proliferation, and motility. PI3Ks work
on phosphorylation of phosphatidylinositol,
phosphatidylinositide (4)P (PtdIns (4)P),2 or
PtdIns(4,5)P2. Specifically they phosphorylate the D3
hydroxyl group of phosphoinositol lipids on the inositol
ring. C2 domains fold into an 8-standed beta-sandwich
that can adopt 2 structural arrangements: Type I and
Type II, distinguished by a circular permutation
involving their N- and C-terminal beta strands. Many C2
domains are Ca2+-dependent membrane-targeting modules
that bind a wide variety of substances including bind
phospholipids, inositol polyphosphates, and
intracellular proteins. Most C2 domain proteins are
either signal transduction enzymes that contain a single
C2 domain, such as protein kinase C, or membrane
trafficking proteins which contain at least two C2
domains, such as synaptotagmin 1. However, there are a
few exceptions to this including RIM isoforms and some
splice variants of piccolo/aczonin and intersectin which
only have a single C2 domain. C2 domains with a calcium
binding region have negatively charged residues,
primarily aspartates, that serve as ligands for calcium
ions. This cd contains the second C2 repeat, C2B, and
has a type-I topology.
Length = 122
Score = 68.5 bits (168), Expect = 5e-16
Identities = 34/99 (34%), Positives = 60/99 (60%), Gaps = 4/99 (4%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKR 90
G++ LS+ ++ ++V+ A+NLP +D + DPYVK YLL Q+ K+KT V ++
Sbjct: 2 GQVKLSISYK--NGTLFVMVMHAKNLPLLDGSD-PDPYVKTYLLPDPQKTTKRKTKVVRK 58
Query: 91 TLNPVYNESFVFE-VPADNLDSVSLELLLLDWDRVTKNE 128
T NP +NE V++ +P ++L L++ + D + +NE
Sbjct: 59 TRNPTFNEMLVYDGLPVEDLQQRVLQVSVWSHDSLVENE 97
>gnl|CDD|176034 cd08388, C2A_Synaptotagmin-4-11, C2A domain first repeat present in
Synaptotagmins 4 and 11. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Synaptotagmins 4 and 11, class 4
synaptotagmins, are located in the brain. Their
functions are unknown. They are distinguished from the
other synaptotagmins by having and Asp to Ser
substitution in their C2A domains. Previously all
synaptotagmins were thought to be calcium sensors in the
regulation of neurotransmitter release and hormone
secretion, but it has been shown that not all of them
bind calcium. Of the 17 identified synaptotagmins only
8 bind calcium (1-3, 5-7, 9, 10). The function of the
two C2 domains that bind calcium are: regulating the
fusion step of synaptic vesicle exocytosis (C2A) and
binding to phosphatidyl-inositol-3,4,5-triphosphate
(PIP3) in the absence of calcium ions and to
phosphatidylinositol bisphosphate (PIP2) in their
presence (C2B). C2B also regulates also the recycling
step of synaptic vesicles. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 128
Score = 65.8 bits (161), Expect = 7e-15
Identities = 35/97 (36%), Positives = 56/97 (57%), Gaps = 4/97 (4%)
Query: 29 GRGEILLSLCWQPAANRFTIVVLKARNLPKMDV-TGLADPYVKVYLLYKGQRVAKKKTHV 87
G + SL + + +++ R+LP MD +G +DPYVK+ LL + + K KT V
Sbjct: 1 KLGTLFFSLRYNSEKKALLVNIIECRDLPAMDEQSGTSDPYVKLQLLPEKEH--KVKTRV 58
Query: 88 KKRTLNPVYNESFVF-EVPADNLDSVSLELLLLDWDR 123
++T NPVY+E+F F +P + L +SL +L +DR
Sbjct: 59 LRKTRNPVYDETFTFYGIPYNQLQDLSLHFAVLSFDR 95
>gnl|CDD|176053 cd08408, C2B_Synaptotagmin-14_16, C2 domain second repeat present
in Synaptotagmins 14 and 16. Synaptotagmin 14 and 16
are membrane-trafficking proteins in specific tissues
outside the brain. Both of these contain C-terminal
tandem C2 repeats, but only Synaptotagmin 14 has an
N-terminal transmembrane domain and a putative
fatty-acylation site. Previously all synaptotagmins were
thought to be calcium sensors in the regulation of
neurotransmitter release and hormone secretion, but it
has been shown that not all of them bind calcium and
this is indeed the case here. Of the 17 identified
synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10).
The function of the two C2 domains that bind calcium
are: regulating the fusion step of synaptic vesicle
exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 138
Score = 64.3 bits (157), Expect = 3e-14
Identities = 29/98 (29%), Positives = 52/98 (53%), Gaps = 1/98 (1%)
Query: 32 EILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYK-GQRVAKKKTHVKKR 90
E+LL L + R ++ V+K N + + D YVK+ LL GQ ++K KT +++
Sbjct: 3 ELLLGLEYNALTGRLSVEVIKGSNFKNLAMNKAPDTYVKLTLLNSDGQEISKSKTSIRRG 62
Query: 91 TLNPVYNESFVFEVPADNLDSVSLELLLLDWDRVTKNE 128
+P + E+FVF+V L V+L + + ++ + E
Sbjct: 63 QPDPEFKETFVFQVALFQLSEVTLMFSVYNKRKMKRKE 100
>gnl|CDD|175995 cd04029, C2A_SLP-4_5, C2 domain first repeat present in
Synaptotagmin-like proteins 4 and 5. All Slp members
basically share an N-terminal Slp homology domain (SHD)
and C-terminal tandem C2 domains (named the C2A domain
and the C2B domain) with the SHD and C2 domains being
separated by a linker sequence of various length. SHD of
Slp (except for the Slp4-SHD) function as a specific
Rab27A/B-binding domain. In addition to Slp, rabphilin,
Noc2, and Munc13-4 also function as Rab27-binding
proteins. It has been demonstrated that Slp4/granuphilin
promotes dense-core vesicle exocytosis. The C2A domain
of Slp4 is Ca2+ dependent. Slp5 mRNA has been shown to
be restricted to human placenta and liver suggesting a
role in Rab27A-dependent membrane trafficking in
specific tissues. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 125
Score = 63.6 bits (155), Expect = 4e-14
Identities = 36/98 (36%), Positives = 55/98 (56%), Gaps = 1/98 (1%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMD-VTGLADPYVKVYLLYKGQRVAKKKTHVKK 89
GEIL SL + + V + RNL D ++PYVK YLL R +K+KT +K+
Sbjct: 2 GEILFSLSYDYKTQSLNVHVKECRNLAYGDEAKKRSNPYVKTYLLPDKSRQSKRKTSIKR 61
Query: 90 RTLNPVYNESFVFEVPADNLDSVSLELLLLDWDRVTKN 127
T NPVYNE+ + + L++ +L+L + +DR +N
Sbjct: 62 NTTNPVYNETLKYSISHSQLETRTLQLSVWHYDRFGRN 99
>gnl|CDD|176002 cd04037, C2E_Ferlin, C2 domain fifth repeat in Ferlin. Ferlins are
involved in vesicle fusion events. Ferlins and other
proteins, such as Synaptotagmins, are implicated in
facilitating the fusion process when cell membranes fuse
together. There are six known human Ferlins: Dysferlin
(Fer1L1), Otoferlin (Fer1L2), Myoferlin (Fer1L3),
Fer1L4, Fer1L5, and Fer1L6. Defects in these genes can
lead to a wide range of diseases including muscular
dystrophy (dysferlin), deafness (otoferlin), and
infertility (fer-1, fertilization factor-1).
Structurally they have 6 tandem C2 domains, designated
as (C2A-C2F) and a single C-terminal transmembrane
domain, though there is a new study that disputes this
and claims that there are actually 7 tandem C2 domains
with another C2 domain inserted between C2D and C2E.
In a subset of them (Dysferlin, Myoferlin, and Fer1)
there is an additional conserved domain called DysF. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the fifth C2
repeat, C2E, and has a type-II topology.
Length = 124
Score = 63.3 bits (155), Expect = 4e-14
Identities = 23/81 (28%), Positives = 47/81 (58%), Gaps = 9/81 (11%)
Query: 50 VLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFE--VPAD 107
V++ARNL D G +DPY+K+ L +++ + ++ TLNPV+ + F E +P +
Sbjct: 6 VVRARNLQPKDPNGKSDPYLKIKLG--KKKINDRDNYIPN-TLNPVFGKMFELEATLPGN 62
Query: 108 NLDSVSLELLLLDWDRVTKNE 128
++ +S ++D+D + ++
Sbjct: 63 SILKIS----VMDYDLLGSDD 79
>gnl|CDD|176070 cd08688, C2_KIAA0528-like, C2 domain found in the Human KIAA0528
cDNA clone. The members of this CD are named after the
Human KIAA0528 cDNA clone. All members here contain a
single C2 repeat. No other information on this protein
is currently known. The C2 domain was first identified
in PKC. C2 domains fold into an 8-standed beta-sandwich
that can adopt 2 structural arrangements: Type I and
Type II, distinguished by a circular permutation
involving their N- and C-terminal beta strands. Many C2
domains are Ca2+-dependent membrane-targeting modules
that bind a wide variety of substances including bind
phospholipids, inositol polyphosphates, and
intracellular proteins. Most C2 domain proteins are
either signal transduction enzymes that contain a single
C2 domain, such as protein kinase C, or membrane
trafficking proteins which contain at least two C2
domains, such as synaptotagmin 1. However, there are a
few exceptions to this including RIM isoforms and some
splice variants of piccolo/aczonin and intersectin which
only have a single C2 domain. C2 domains with a calcium
binding region have negatively charged residues,
primarily aspartates, that serve as ligands for calcium
ions.
Length = 110
Score = 62.7 bits (153), Expect = 6e-14
Identities = 32/85 (37%), Positives = 48/85 (56%), Gaps = 7/85 (8%)
Query: 47 TIVVLKARNLPKMD-VTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYN-ESFVFEV 104
+ V+ AR+LP MD + L D +V+V G K T V K++LNPV+N E F FEV
Sbjct: 2 KVRVVAARDLPVMDRSSDLTDAFVEVKF---GSTTYK--TDVVKKSLNPVWNSEWFRFEV 56
Query: 105 PADNLDSVSLELLLLDWDRVTKNEA 129
+ L L++ ++D D + N+A
Sbjct: 57 DDEELQDEPLQIRVMDHDTYSANDA 81
>gnl|CDD|175994 cd04028, C2B_RIM1alpha, C2 domain second repeat contained in
Rab3-interacting molecule (RIM) proteins. RIMs are
believed to organize specialized sites of the plasma
membrane called active zones. They also play a role in
controlling neurotransmitter release, plasticity
processes, as well as memory and learning. RIM contains
an N-terminal zinc finger domain, a PDZ domain, and two
C-terminal C2 domains (C2A, C2B). C2 domains fold into
an 8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members here have a type-I
topology and do not bind Ca2+.
Length = 146
Score = 62.4 bits (152), Expect = 2e-13
Identities = 30/75 (40%), Positives = 44/75 (58%), Gaps = 3/75 (4%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNL-PKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKK 89
G+I L L + + V++AR L K L PYVKVYLL + +AKKKT + +
Sbjct: 18 GDIQLGLYDKKGQ--LEVEVIRARGLVQKPGSKVLPAPYVKVYLLEGKKCIAKKKTKIAR 75
Query: 90 RTLNPVYNESFVFEV 104
+TL+P+Y + VF+V
Sbjct: 76 KTLDPLYQQQLVFDV 90
>gnl|CDD|227371 COG5038, COG5038, Ca2+-dependent lipid-binding protein, contains C2
domain [General function prediction only].
Length = 1227
Score = 62.1 bits (151), Expect = 3e-12
Identities = 32/81 (39%), Positives = 42/81 (51%), Gaps = 6/81 (7%)
Query: 47 TIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPA 106
TI++ NLP D G +DP+VK L + V K K K+TLNPV+NE F EV
Sbjct: 1043 TIMLRSGENLPSSDENGYSDPFVK--LFLNEKSVYKTKVV--KKTLNPVWNEEFTIEVLN 1098
Query: 107 DNLDSVSLELLLLDWDRVTKN 127
D + + + DWD KN
Sbjct: 1099 RVKDVL--TINVNDWDSGEKN 1117
Score = 38.6 bits (90), Expect = 4e-04
Identities = 26/81 (32%), Positives = 38/81 (46%), Gaps = 9/81 (11%)
Query: 48 IVVLKARNLPKMD--VTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVP 105
+ + A L K D + G DPY+ V + KT VKK TLNPV+NE+F +
Sbjct: 440 VKIKSAEGLKKSDSTINGTVDPYITVTFSDRV----IGKTRVKKNTLNPVWNETFY--IL 493
Query: 106 ADNLDSVSLELLLLDWDRVTK 126
++ L L L D++
Sbjct: 494 LNSFTD-PLNLSLYDFNSFKS 513
Score = 31.3 bits (71), Expect = 0.11
Identities = 18/64 (28%), Positives = 27/64 (42%), Gaps = 6/64 (9%)
Query: 36 SLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPV 95
A R ++ KA +L G +DPY V + + K +T TLNP+
Sbjct: 705 VYDTPIGAIRVSVR--KANDLRNEIPGGKSDPYATVLV----NNLVKYRTIYGSSTLNPI 758
Query: 96 YNES 99
+NE
Sbjct: 759 WNEI 762
>gnl|CDD|175999 cd04033, C2_NEDD4_NEDD4L, C2 domain present in the Human neural
precursor cell-expressed, developmentally down-regulated
4 (NEDD4) and NEDD4-like (NEDD4L/NEDD42). Nedd4 and
Nedd4-2 are two of the nine members of the Human Nedd4
family. All vertebrates appear to have both Nedd4 and
Nedd4-2 genes. They are thought to participate in the
regulation of epithelial Na+ channel (ENaC) activity.
They also have identical specificity for ubiquitin
conjugating enzymes (E2). Nedd4 and Nedd4-2 are
composed of a C2 domain, 2-4 WW domains, and a ubiquitin
ligase Hect domain. Their WW domains can bind PPxY (PY)
or LPSY motifs, and in vitro studies suggest that WW3
and WW4 of both proteins bind PY motifs in the key
substrates, with WW3 generally exhibiting higher
affinity. Most Nedd4 family members, especially Nedd4-2,
also have multiple splice variants, which might play
different roles in regulating their substrates. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 133
Score = 58.5 bits (142), Expect = 5e-12
Identities = 29/83 (34%), Positives = 44/83 (53%), Gaps = 9/83 (10%)
Query: 48 IVVLKARNLPKMDVTGLADPYVKVYLLYKGQR---VAKKKTHVKKRTLNPVYNESFVFEV 104
+ VL +L K D+ G +DPYVK+ L Y + +T K+TLNP +NE F F V
Sbjct: 4 VKVLAGIDLAKKDIFGASDPYVKISL-YDPDGNGEIDSVQTKTIKKTLNPKWNEEFFFRV 62
Query: 105 -PADNLDSVSLELLLLDWDRVTK 126
P ++ L + D +R+T+
Sbjct: 63 NPREH----RLLFEVFDENRLTR 81
>gnl|CDD|175991 cd04025, C2B_RasA1_RasA4, C2 domain second repeat present in RasA1
and RasA4. RasA1 and RasA4 are GAP1s (GTPase activating
protein 1s ), Ras-specific GAP members, which suppresses
Ras function by enhancing the GTPase activity of Ras
proteins resulting in the inactive GDP-bound form of
Ras. In this way it can control cellular proliferation
and differentiation. Both proteins contain two C2
domains, a Ras-GAP domain, a plextrin homology
(PH)-like domain, and a Bruton's Tyrosine Kinase (BTK)
zinc binding domain. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 123
Score = 56.3 bits (136), Expect = 2e-11
Identities = 31/79 (39%), Positives = 47/79 (59%), Gaps = 7/79 (8%)
Query: 50 VLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPADNL 109
VL+AR+L D G +DP+V+V+ Y GQ +T V K++ P +NE F FE+
Sbjct: 6 VLEARDLAPKDRNGTSDPFVRVF--YNGQ---TLETSVVKKSCYPRWNEVFEFELMEGAD 60
Query: 110 DSVSLELLLLDWDRVTKNE 128
+S+E + DWD V+KN+
Sbjct: 61 SPLSVE--VWDWDLVSKND 77
>gnl|CDD|176022 cd08376, C2B_MCTP_PRT, C2 domain second repeat found in Multiple C2
domain and Transmembrane region Proteins (MCTP). MCTPs
are involved in Ca2+ signaling at the membrane. MCTP is
composed of a variable N-terminal sequence, three C2
domains, two transmembrane regions (TMRs), and a short
C-terminal sequence. It is one of four protein classes
that are anchored to membranes via a transmembrane
region; the others being synaptotagmins, extended
synaptotagmins, and ferlins. MCTPs are the only
membrane-bound C2 domain proteins that contain two
functional TMRs. MCTPs are unique in that they bind Ca2+
but not phospholipids. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 116
Score = 55.0 bits (133), Expect = 6e-11
Identities = 34/82 (41%), Positives = 46/82 (56%), Gaps = 7/82 (8%)
Query: 47 TIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPA 106
TIV+++ +NLP MD GL+DPYVK L G K K+ V +TLNP + E F +
Sbjct: 3 TIVLVEGKNLPPMDDNGLSDPYVKFRL---GNE--KYKSKVCSKTLNPQWLEQFDLHLFD 57
Query: 107 DNLDSVSLELLLLDWDRVTKNE 128
D S LE+ + D D K+E
Sbjct: 58 DQ--SQILEIEVWDKDTGKKDE 77
>gnl|CDD|176008 cd04043, C2_Munc13_fungal, C2 domain in Munc13 (mammalian
uncoordinated) proteins; fungal group. C2-like domains
are thought to be involved in phospholipid binding in a
Ca2+ independent manner in both Unc13 and Munc13.
Caenorabditis elegans Unc13 has a central domain with
sequence similarity to PKC, which includes C1 and
C2-related domains. Unc13 binds phorbol esters and DAG
with high affinity in a phospholipid manner. Mutations
in Unc13 results in abnormal neuronal connections and
impairment in cholinergic neurotransmission in the
nematode. Munc13 is the mammalian homolog which are
expressed in the brain. There are 3 isoforms (Munc13-1,
-2, -3) and are thought to play a role in
neurotransmitter release and are hypothesized to be
high-affinity receptors for phorbol esters. Unc13 and
Munc13 contain both C1 and C2 domains. There are two C2
related domains present, one central and one at the
carboxyl end. Munc13-1 contains a third C2-like domain.
Munc13 interacts with syntaxin, synaptobrevin, and
synaptotagmin suggesting a role for these as scaffolding
proteins. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 126
Score = 53.8 bits (130), Expect = 2e-10
Identities = 30/78 (38%), Positives = 41/78 (52%), Gaps = 6/78 (7%)
Query: 46 FTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVP 105
FTI +++A NL GL+DPYV + +R+AK +T TLNP ++E F EVP
Sbjct: 3 FTIRIVRAENLKADSSNGLSDPYVTLVDTNGKRRIAKTRT--IYDTLNPRWDEEFELEVP 60
Query: 106 ADNLDSVSLELLLLDWDR 123
A L + WDR
Sbjct: 61 AGE----PLWISATVWDR 74
>gnl|CDD|175984 cd04017, C2D_Ferlin, C2 domain fourth repeat in Ferlin. Ferlins
are involved in vesicle fusion events. Ferlins and
other proteins, such as Synaptotagmins, are implicated
in facilitating the fusion process when cell membranes
fuse together. There are six known human Ferlins:
Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin
(Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these
genes can lead to a wide range of diseases including
muscular dystrophy (dysferlin), deafness (otoferlin),
and infertility (fer-1, fertilization factor-1).
Structurally they have 6 tandem C2 domains, designated
as (C2A-C2F) and a single C-terminal transmembrane
domain, though there is a new study that disputes this
and claims that there are actually 7 tandem C2 domains
with another C2 domain inserted between C2D and C2E.
In a subset of them (Dysferlin, Myoferlin, and Fer1)
there is an additional conserved domain called DysF. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the fourth C2
repeat, C2D, and has a type-II topology.
Length = 135
Score = 54.1 bits (131), Expect = 2e-10
Identities = 29/85 (34%), Positives = 45/85 (52%), Gaps = 16/85 (18%)
Query: 53 ARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVF---EVP---- 105
AR+L D +GL+DP+ +V L + Q +T V K TL+P ++++ +F E+
Sbjct: 10 ARDLLAADKSGLSDPFARVSFLNQSQ-----ETEVIKETLSPTWDQTLIFDEVELYGSPE 64
Query: 106 --ADNLDSVSLELLLLDWDRVTKNE 128
A N V +E L D D V K+E
Sbjct: 65 EIAQNPPLVVVE--LFDQDSVGKDE 87
>gnl|CDD|176038 cd08392, C2A_SLP-3, C2 domain first repeat present in
Synaptotagmin-like protein 3. All Slp members basically
share an N-terminal Slp homology domain (SHD) and
C-terminal tandem C2 domains (named the C2A domain and
the C2B domain) with the SHD and C2 domains being
separated by a linker sequence of various length. SHD of
Slp (except for the Slp4-SHD) function as a specific
Rab27A/B-binding domain. In addition to Slp, rabphilin,
Noc2, and Munc13-4 also function as Rab27-binding
proteins. Little is known about the expression or
localization of Slp3. The C2A domain of Slp3 is Ca2+
dependent. It has been demonstrated that Slp3 promotes
dense-core vesicle exocytosis. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 128
Score = 53.3 bits (128), Expect = 4e-10
Identities = 34/87 (39%), Positives = 46/87 (52%), Gaps = 1/87 (1%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMDVTG-LADPYVKVYLLYKGQRVAKKKTHVKK 89
GEI +L + + I + RNL D PYVKV LL +K+KT VKK
Sbjct: 2 GEIEFALHYNFRTSCLEITIKACRNLAYGDEKKKKCHPYVKVCLLPDKSHNSKRKTAVKK 61
Query: 90 RTLNPVYNESFVFEVPADNLDSVSLEL 116
T+NPV+NE+ + V AD L S L++
Sbjct: 62 GTVNPVFNETLKYVVEADLLSSRQLQV 88
>gnl|CDD|176035 cd08389, C2A_Synaptotagmin-14_16, C2A domain first repeat present
in Synaptotagmins 14 and 16. Synaptotagmin 14 and 16
are membrane-trafficking proteins in specific tissues
outside the brain. Both of these contain C-terminal
tandem C2 repeats, but only Synaptotagmin 14 has an
N-terminal transmembrane domain and a putative
fatty-acylation site. Previously all synaptotagmins were
thought to be calcium sensors in the regulation of
neurotransmitter release and hormone secretion, but it
has been shown that not all of them bind calcium and
this is indeed the case here. Of the 17 identified
synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10).
The function of the two C2 domains that bind calcium
are: regulating the fusion step of synaptic vesicle
exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 124
Score = 53.0 bits (128), Expect = 5e-10
Identities = 31/98 (31%), Positives = 57/98 (58%), Gaps = 6/98 (6%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLL-YKGQRVAKKKTHVKK 89
G++ ++ + P+A + T+ V++A+++P D G + V + LL K QR KT V++
Sbjct: 3 GDLDVAFEYDPSARKLTVTVIRAQDIPTKDRGGASSWQVHLVLLPSKKQR---AKTKVQR 59
Query: 90 RTLNPVYNESFVF-EVPADNLDSVSLELLLLDWDRVTK 126
NPV+NE+F F V + L++++L L +R+ K
Sbjct: 60 GP-NPVFNETFTFSRVEPEELNNMALRFRLYGVERMRK 96
>gnl|CDD|176001 cd04036, C2_cPLA2, C2 domain present in cytosolic PhosphoLipase A2
(cPLA2). A single copy of the C2 domain is present in
cPLA2 which releases arachidonic acid from membranes
initiating the biosynthesis of potent inflammatory
mediators such as prostaglandins, leukotrienes, and
platelet-activating factor. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members of this cd have a
type-II topology.
Length = 119
Score = 51.5 bits (124), Expect = 2e-09
Identities = 30/83 (36%), Positives = 48/83 (57%), Gaps = 10/83 (12%)
Query: 45 RFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVA---KKKTHVKKRTLNPVYNESFV 101
T+ VL+A N+ K D+ D YV+++L A KK+T K ++NPV+NE+F
Sbjct: 1 LLTVRVLRATNITKGDLLSTPDCYVELWL-----PTASDEKKRTKTIKNSINPVWNETFE 55
Query: 102 FEVPADNLDSVSLELLLLDWDRV 124
F + + + +V LEL ++D D V
Sbjct: 56 FRIQS-QVKNV-LELTVMDEDYV 76
>gnl|CDD|176037 cd08391, C2A_C2C_Synaptotagmin_like, C2 domain first and third
repeat in Synaptotagmin-like proteins. Synaptotagmin is
a membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Previously all synaptotagmins
were thought to be calcium sensors in the regulation of
neurotransmitter release and hormone secretion, but it
has been shown that not all of them bind calcium. Of
the 17 identified synaptotagmins only 8 bind calcium
(1-3, 5-7, 9, 10). The function of the two C2 domains
that bind calcium are: regulating the fusion step of
synaptic vesicle exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains either the
first or third repeat in Synaptotagmin-like proteins
with a type-I topology.
Length = 121
Score = 51.1 bits (123), Expect = 2e-09
Identities = 30/84 (35%), Positives = 41/84 (48%), Gaps = 17/84 (20%)
Query: 48 IVVLKARNLPKMD------VTGLADPYVKVYLLYKGQRVAKK--KTHVKKRTLNPVYNES 99
I V++A++L D V G +DPYV V RV + K+ V K LNP +NE
Sbjct: 5 IHVIEAQDLVAKDKFVGGLVKGKSDPYVIV-------RVGAQTFKSKVIKENLNPKWNE- 56
Query: 100 FVFEVPADNLDSVSLELLLLDWDR 123
V+E D + LE+ L D D
Sbjct: 57 -VYEAVVDEVPGQELEIELFDEDP 79
>gnl|CDD|176004 cd04039, C2_PSD, C2 domain present in Phosphatidylserine
decarboxylase (PSD). PSD is involved in the
biosynthesis of aminophospholipid by converting
phosphatidylserine (PtdSer) to phosphatidylethanolamine
(PtdEtn). There is a single C2 domain present and it is
thought to confer PtdSer binding motif that is common to
PKC and synaptotagmin. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 108
Score = 50.7 bits (122), Expect = 2e-09
Identities = 26/82 (31%), Positives = 42/82 (51%), Gaps = 10/82 (12%)
Query: 50 VLKARNLP---KMDVTGLA-DPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVP 105
+ +LP M TG DP+V + G+RV + T ++ TLNPV+NE FEV
Sbjct: 7 IKSITDLPPLKNMTRTGFDMDPFVIISF---GRRVFR--TSWRRHTLNPVFNERLAFEV- 60
Query: 106 ADNLDSVSLELLLLDWDRVTKN 127
+ + ++ +LD D+ + N
Sbjct: 61 YPHEKNFDIQFKVLDKDKFSFN 82
>gnl|CDD|175985 cd04018, C2C_Ferlin, C2 domain third repeat in Ferlin. Ferlins are
involved in vesicle fusion events. Ferlins and other
proteins, such as Synaptotagmins, are implicated in
facilitating the fusion process when cell membranes fuse
together. There are six known human Ferlins: Dysferlin
(Fer1L1), Otoferlin (Fer1L2), Myoferlin (Fer1L3),
Fer1L4, Fer1L5, and Fer1L6. Defects in these genes can
lead to a wide range of diseases including muscular
dystrophy (dysferlin), deafness (otoferlin), and
infertility (fer-1, fertilization factor-1).
Structurally they have 6 tandem C2 domains, designated
as (C2A-C2F) and a single C-terminal transmembrane
domain, though there is a new study that disputes this
and claims that there are actually 7 tandem C2 domains
with another C2 domain inserted between C2D and C2E.
In a subset of them (Dysferlin, Myoferlin, and Fer1)
there is an additional conserved domain called DysF. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the third C2
repeat, C2C, and has a type-II topology.
Length = 151
Score = 50.3 bits (121), Expect = 7e-09
Identities = 32/101 (31%), Positives = 49/101 (48%), Gaps = 24/101 (23%)
Query: 45 RFTIVVLKARNLPKMD--------------VTGLADPYVKVYLLYKGQRVAKKKTHVKKR 90
RF + +A +LP+MD L DPYV+V + GQ+V KT VKK
Sbjct: 1 RFIFKIYRAEDLPQMDSGIMANVKKAFLGEKKELVDPYVEVS--FAGQKV---KTSVKKN 55
Query: 91 TLNPVYNESFVFEVPADNLDSV--SLELLLLDWDRVTKNEA 129
+ NP +NE VF + + +++ + DWDRV ++
Sbjct: 56 SYNPEWNEQIVF---PEMFPPLCERIKIQIRDWDRVGNDDV 93
>gnl|CDD|175977 cd04010, C2B_RasA3, C2 domain second repeat present in RAS p21
protein activator 3 (RasA3). RasA3 are members of
GTPase activating protein 1 (GAP1), a Ras-specific GAP,
which suppresses Ras function by enhancing the GTPase
activity of Ras proteins resulting in the inactive
GDP-bound form of Ras. In this way it can control
cellular proliferation and differentiation. RasA3
contains an N-terminal C2 domain, a Ras-GAP domain, a
plextrin homology (PH)-like domain, and a Bruton's
Tyrosine Kinase (BTK) zinc binding domain. C2 domains
fold into an 8-standed beta-sandwich that can adopt 2
structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 148
Score = 49.7 bits (119), Expect = 1e-08
Identities = 22/64 (34%), Positives = 38/64 (59%), Gaps = 2/64 (3%)
Query: 45 RFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEV 104
+ ++ V++ +L G DPY V L+Y ++ K+T VKK+T NP ++E+F F+V
Sbjct: 1 KLSVRVIECSDLAL--KNGTCDPYASVTLIYSNKKQDTKRTKVKKKTNNPQFDEAFYFDV 58
Query: 105 PADN 108
D+
Sbjct: 59 TIDS 62
>gnl|CDD|176057 cd08675, C2B_RasGAP, C2 domain second repeat of Ras GTPase
activating proteins (GAPs). RasGAPs suppress Ras
function by enhancing the GTPase activity of Ras
proteins resulting in the inactive GDP-bound form of
Ras. In this way it can control cellular proliferation
and differentiation. The proteins here all contain two
tandem C2 domains, a Ras-GAP domain, and a pleckstrin
homology (PH)-like domain. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members here have a type-I
topology.
Length = 137
Score = 48.9 bits (117), Expect = 2e-08
Identities = 22/62 (35%), Positives = 35/62 (56%), Gaps = 2/62 (3%)
Query: 47 TIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPA 106
++ VL+ R+L G DP+ +V L Y + K+ T VKK+T NP ++E+F FE+
Sbjct: 2 SVRVLECRDLALK-SNGTCDPFARVTLNYSSKTDTKR-TKVKKKTNNPRFDEAFYFELTI 59
Query: 107 DN 108
Sbjct: 60 GF 61
>gnl|CDD|175974 cd00275, C2_PLC_like, C2 domain present in
Phosphoinositide-specific phospholipases C (PLC). PLCs
are involved in the hydrolysis of
phosphatidylinositol-4,5-bisphosphate (PIP2) to
d-myo-inositol-1,4,5-trisphosphate (1,4,5-IP3) and
sn-1,2-diacylglycerol (DAG). 1,4,5-IP3 and DAG are
second messengers in eukaryotic signal transduction
cascades. PLC is composed of a N-terminal PH domain
followed by a series of EF hands, a catalytic TIM barrel
and a C-terminal C2 domain. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members here have a type-II
topology.
Length = 128
Score = 48.7 bits (117), Expect = 2e-08
Identities = 26/66 (39%), Positives = 35/66 (53%), Gaps = 8/66 (12%)
Query: 45 RFTIVVLKARNLPKM--DVTGLADPYVKVYLLYKG---QRVAKKKTHVKKR-TLNPVYNE 98
TI ++ + LPK D + DPYV+V + G AK KT V K NPV+NE
Sbjct: 3 TLTIKIISGQQLPKPKGDKGSIVDPYVEVEIH--GLPADDSAKFKTKVVKNNGFNPVWNE 60
Query: 99 SFVFEV 104
+F F+V
Sbjct: 61 TFEFDV 66
>gnl|CDD|175978 cd04011, C2B_Ferlin, C2 domain second repeat in Ferlin. Ferlins
are involved in vesicle fusion events. Ferlins and
other proteins, such as Synaptotagmins, are implicated
in facilitating the fusion process when cell membranes
fuse together. There are six known human Ferlins:
Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin
(Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these
genes can lead to a wide range of diseases including
muscular dystrophy (dysferlin), deafness (otoferlin),
and infertility (fer-1, fertilization factor-1).
Structurally they have 6 tandem C2 domains, designated
as (C2A-C2F) and a single C-terminal transmembrane
domain, though there is a new study that disputes this
and claims that there are actually 7 tandem C2 domains
with another C2 domain inserted between C2D and C2E.
In a subset of them (Dysferlin, Myoferlin, and Fer1)
there is an additional conserved domain called DysF. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 111
Score = 47.6 bits (114), Expect = 4e-08
Identities = 25/57 (43%), Positives = 29/57 (50%), Gaps = 9/57 (15%)
Query: 48 IVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEV 104
+ V++AR L G DP VKV + GQ KK T VKK T P YNE F F
Sbjct: 8 VRVIEARQLV----GGNIDPVVKVEVG--GQ---KKYTSVKKGTNCPFYNEYFFFNF 55
>gnl|CDD|175989 cd04022, C2A_MCTP_PRT_plant, C2 domain first repeat found in
Multiple C2 domain and Transmembrane region Proteins
(MCTP); plant subset. MCTPs are involved in Ca2+
signaling at the membrane. Plant-MCTPs are composed of
a variable N-terminal sequence, four C2 domains, two
transmembrane regions (TMRs), and a short C-terminal
sequence. It is one of four protein classes that are
anchored to membranes via a transmembrane region; the
others being synaptotagmins, extended synaptotagmins,
and ferlins. MCTPs are the only membrane-bound C2 domain
proteins that contain two functional TMRs. MCTPs are
unique in that they bind Ca2+ but not phospholipids. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-II topology.
Length = 127
Score = 47.7 bits (114), Expect = 5e-08
Identities = 25/71 (35%), Positives = 38/71 (53%), Gaps = 9/71 (12%)
Query: 50 VLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPADNL 109
V+ A++L D G + YV++ + GQ+ K+T K + LNPV+NE VF V
Sbjct: 6 VVDAQDLMPKDGQGSSSAYVELD--FDGQK---KRTRTKPKDLNPVWNEKLVFNVS---- 56
Query: 110 DSVSLELLLLD 120
D L L+L+
Sbjct: 57 DPSRLSNLVLE 67
>gnl|CDD|176058 cd08676, C2A_Munc13-like, C2 domain first repeat in Munc13
(mammalian uncoordinated)-like proteins. C2-like
domains are thought to be involved in phospholipid
binding in a Ca2+ independent manner in both Unc13 and
Munc13. Caenorabditis elegans Unc13 has a central domain
with sequence similarity to PKC, which includes C1 and
C2-related domains. Unc13 binds phorbol esters and DAG
with high affinity in a phospholipid manner. Mutations
in Unc13 results in abnormal neuronal connections and
impairment in cholinergic neurotransmission in the
nematode. Munc13 is the mammalian homolog which are
expressed in the brain. There are 3 isoforms (Munc13-1,
-2, -3) and are thought to play a role in
neurotransmitter release and are hypothesized to be
high-affinity receptors for phorbol esters. Unc13 and
Munc13 contain both C1 and C2 domains. There are two C2
related domains present, one central and one at the
carboxyl end. Munc13-1 contains a third C2-like domain.
Munc13 interacts with syntaxin, synaptobrevin, and
synaptotagmin suggesting a role for these as scaffolding
proteins. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 153
Score = 48.1 bits (115), Expect = 5e-08
Identities = 31/101 (30%), Positives = 46/101 (45%), Gaps = 30/101 (29%)
Query: 48 IVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKK----------------------- 84
+ V++A+ L DV G +DPY + ++ + +K
Sbjct: 32 VTVIEAKGLLAKDVNGFSDPYCMLGIVPASRERNSEKSKKRKSHRKKAVLKDTVPAKSIK 91
Query: 85 -THVKKRTLNPVYNESFVFEVPADNLDSVSLELLLLD-WDR 123
T VK +TLNPV+NE+F FEV + VS + L LD WD
Sbjct: 92 VTEVKPQTLNPVWNETFRFEV-----EDVSNDQLHLDIWDH 127
>gnl|CDD|176003 cd04038, C2_ArfGAP, C2 domain present in Arf GTPase Activating
Proteins (GAP). ArfGAP is a GTPase activating protein
which regulates the ADP ribosylation factor Arf, a
member of the Ras superfamily of GTP-binding proteins.
The GTP-bound form of Arf is involved in Golgi
morphology and is involved in recruiting coat proteins.
ArfGAP is responsible for the GDP-bound form of Arf
which is necessary for uncoating the membrane and
allowing the Golgi to fuse with an acceptor compartment.
These proteins contain an N-terminal ArfGAP domain
containing the characteristic zinc finger motif
(Cys-x2-Cys-x(16,17)-x2-Cys) and C-terminal C2 domain.
C2 domains were first identified in Protein Kinase C
(PKC). C2 domains fold into an 8-standed beta-sandwich
that can adopt 2 structural arrangements: Type I and
Type II, distinguished by a circular permutation
involving their N- and C-terminal beta strands. Many C2
domains are Ca2+-dependent membrane-targeting modules
that bind a wide variety of substances including bind
phospholipids, inositol polyphosphates, and
intracellular proteins. Most C2 domain proteins are
either signal transduction enzymes that contain a single
C2 domain, such as protein kinase C, or membrane
trafficking proteins which contain at least two C2
domains, such as synaptotagmin 1. However, there are a
few exceptions to this including RIM isoforms and some
splice variants of piccolo/aczonin and intersectin which
only have a single C2 domain. C2 domains with a calcium
binding region have negatively charged residues,
primarily aspartates, that serve as ligands for calcium
ions.
Length = 145
Score = 47.3 bits (113), Expect = 9e-08
Identities = 29/81 (35%), Positives = 42/81 (51%), Gaps = 9/81 (11%)
Query: 48 IVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPAD 107
+ V++ NL D T +DPYV + L G + K KT V K+ LNPV+NE VP
Sbjct: 6 VRVVRGTNLAVRDFTS-SDPYVVLTL---GNQ--KVKTRVIKKNLNPVWNEELTLSVPNP 59
Query: 108 NLDSVSLELLLLDWDRVTKNE 128
L+L + D D +K++
Sbjct: 60 MA---PLKLEVFDKDTFSKDD 77
>gnl|CDD|176029 cd08383, C2A_RasGAP, C2 domain (first repeat) of Ras GTPase
activating proteins (GAPs). RasGAPs suppress Ras
function by enhancing the GTPase activity of Ras
proteins resulting in the inactive GDP-bound form of
Ras. In this way it can control cellular proliferation
and differentiation. The proteins here all contain
either a single C2 domain or two tandem C2 domains, a
Ras-GAP domain, and a pleckstrin homology (PH)-like
domain. C2 domains fold into an 8-standed beta-sandwich
that can adopt 2 structural arrangements: Type I and
Type II, distinguished by a circular permutation
involving their N- and C-terminal beta strands. Many C2
domains are Ca2+-dependent membrane-targeting modules
that bind a wide variety of substances including bind
phospholipids, inositol polyphosphates, and
intracellular proteins. Most C2 domain proteins are
either signal transduction enzymes that contain a single
C2 domain, such as protein kinase C, or membrane
trafficking proteins which contain at least two C2
domains, such as synaptotagmin 1. However, there are a
few exceptions to this including RIM isoforms and some
splice variants of piccolo/aczonin and intersectin which
only have a single C2 domain. C2 domains with a calcium
binding region have negatively charged residues,
primarily aspartates, that serve as ligands for calcium
ions. Members here have a type-I topology.
Length = 117
Score = 46.9 bits (112), Expect = 9e-08
Identities = 23/75 (30%), Positives = 36/75 (48%), Gaps = 8/75 (10%)
Query: 48 IVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPAD 107
+ +L+A+NLP G DPY V L +V +T ++ LNP + E FVF+ P
Sbjct: 4 LRILEAKNLP---SKGTRDPYCTVSL----DQVEVARTKTVEK-LNPFWGEEFVFDDPPP 55
Query: 108 NLDSVSLELLLLDWD 122
++ +L D
Sbjct: 56 DVTFFTLSFYNKDKR 70
>gnl|CDD|175993 cd04027, C2B_Munc13, C2 domain second repeat in Munc13 (mammalian
uncoordinated) proteins. C2-like domains are thought to
be involved in phospholipid binding in a Ca2+
independent manner in both Unc13 and Munc13.
Caenorabditis elegans Unc13 has a central domain with
sequence similarity to PKC, which includes C1 and
C2-related domains. Unc13 binds phorbol esters and DAG
with high affinity in a phospholipid manner. Mutations
in Unc13 results in abnormal neuronal connections and
impairment in cholinergic neurotransmission in the
nematode. Munc13 is the mammalian homolog which are
expressed in the brain. There are 3 isoforms (Munc13-1,
-2, -3) and are thought to play a role in
neurotransmitter release and are hypothesized to be
high-affinity receptors for phorbol esters. Unc13 and
Munc13 contain both C1 and C2 domains. There are two C2
related domains present, one central and one at the
carboxyl end. Munc13-1 contains a third C2-like domain.
Munc13 interacts with syntaxin, synaptobrevin, and
synaptotagmin suggesting a role for these as scaffolding
proteins. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 127
Score = 46.4 bits (110), Expect = 2e-07
Identities = 25/59 (42%), Positives = 35/59 (59%), Gaps = 5/59 (8%)
Query: 45 RFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFE 103
+ +I V+ A+ L D TG +DPYV V + G+ KK+T + LNPV+NE F FE
Sbjct: 2 KISITVVCAQGLIAKDKTGTSDPYVTVQV---GK--TKKRTKTIPQNLNPVWNEKFHFE 55
>gnl|CDD|176007 cd04042, C2A_MCTP_PRT, C2 domain first repeat found in Multiple C2
domain and Transmembrane region Proteins (MCTP). MCTPs
are involved in Ca2+ signaling at the membrane. MCTP is
composed of a variable N-terminal sequence, three C2
domains, two transmembrane regions (TMRs), and a short
C-terminal sequence. It is one of four protein classes
that are anchored to membranes via a transmembrane
region; the others being synaptotagmins, extended
synaptotagmins, and ferlins. MCTPs are the only
membrane-bound C2 domain proteins that contain two
functional TMRs. MCTPs are unique in that they bind Ca2+
but not phospholipids. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-II topology.
Length = 121
Score = 46.1 bits (110), Expect = 2e-07
Identities = 23/51 (45%), Positives = 28/51 (54%), Gaps = 4/51 (7%)
Query: 54 RNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEV 104
RNL D G +DPYVK Y G+ V K KT K LNPV++E F +
Sbjct: 10 RNLAARDRGGTSDPYVKFK--YGGKTVYKSKTIYK--NLNPVWDEKFTLPI 56
>gnl|CDD|176019 cd08373, C2A_Ferlin, C2 domain first repeat in Ferlin. Ferlins are
involved in vesicle fusion events. Ferlins and other
proteins, such as Synaptotagmins, are implicated in
facilitating the fusion process when cell membranes fuse
together. There are six known human Ferlins: Dysferlin
(Fer1L1), Otoferlin (Fer1L2), Myoferlin (Fer1L3),
Fer1L4, Fer1L5, and Fer1L6. Defects in these genes can
lead to a wide range of diseases including muscular
dystrophy (dysferlin), deafness (otoferlin), and
infertility (fer-1, fertilization factor-1).
Structurally they have 6 tandem C2 domains, designated
as (C2A-C2F) and a single C-terminal transmembrane
domain, though there is a new study that disputes this
and claims that there are actually 7 tandem C2 domains
with another C2 domain inserted between C2D and C2E.
In a subset of them (Dysferlin, Myoferlin, and Fer1)
there is an additional conserved domain called DysF. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-II topology.
Length = 127
Score = 45.7 bits (109), Expect = 3e-07
Identities = 27/79 (34%), Positives = 45/79 (56%), Gaps = 7/79 (8%)
Query: 49 VVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPADN 108
+V+ +NLP + G D KV ++G KKKT V + LNPV+NE+F + +
Sbjct: 1 LVVSLKNLPGL--KGKGDRIAKV--TFRG---VKKKTRVLENELNPVWNETFEWPLAGSP 53
Query: 109 LDSVSLELLLLDWDRVTKN 127
SLE+++ D+++V +N
Sbjct: 54 DPDESLEIVVKDYEKVGRN 72
>gnl|CDD|176012 cd04047, C2B_Copine, C2 domain second repeat in Copine. There are
2 copies of the C2 domain present in copine, a protein
involved in membrane trafficking, protein-protein
interactions, and perhaps even cell division and growth.
C2 domains fold into an 8-standed beta-sandwich that
can adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 110
Score = 45.2 bits (108), Expect = 3e-07
Identities = 22/83 (26%), Positives = 39/83 (46%), Gaps = 8/83 (9%)
Query: 51 LKARNLPKMDVTGLADPYVKVYLLYK-GQRVAKKKTHVKKRTLNPVYNESFVFEVPADNL 109
+ L K D G +DP++++ + G V +T V K TLNPV+ F +P L
Sbjct: 7 FSGKKLDKKDFFGKSDPFLEISRQSEDGTWVLVYRTEVIKNTLNPVWKP---FTIPLQKL 63
Query: 110 ----DSVSLELLLLDWDRVTKNE 128
+++ + D+D K++
Sbjct: 64 CNGDYDRPIKIEVYDYDSSGKHD 86
>gnl|CDD|176067 cd08685, C2_RGS-like, C2 domain of the Regulator Of G-Protein
Signaling (RGS) family. This CD contains members of the
regulator of G-protein signaling (RGS) family. RGS is a
GTPase activating protein which inhibits G-protein
mediated signal transduction. The protein is largely
cytosolic, but G-protein activation leads to
translocation of this protein to the plasma membrane. A
nuclear form of this protein has also been described,
but its sequence has not been identified. There are
multiple alternatively spliced transcript variants in
this family with some members having additional domains
(ex. PDZ and RGS) downstream of the C2 domain. The C2
domain was first identified in PKC. C2 domains fold into
an 8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 119
Score = 44.8 bits (106), Expect = 7e-07
Identities = 27/96 (28%), Positives = 52/96 (54%), Gaps = 6/96 (6%)
Query: 31 GEILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKR 90
G++ LS+ Q + T+ VL+A+ L + +G + YVK+ L + ++KT
Sbjct: 1 GQLKLSIEGQ--NRKLTLHVLEAKGLRSTN-SGTCNSYVKISLSPDKEVRFRQKTSTVPD 57
Query: 91 TLNPVYNESFVFEVPADNLDSVSLELLLLDWDRVTK 126
+ NP+++E+F F+V N LL+ W++++K
Sbjct: 58 SANPLFHETFSFDV---NERDYQKRLLVTVWNKLSK 90
>gnl|CDD|176023 cd08377, C2C_MCTP_PRT, C2 domain third repeat found in Multiple C2
domain and Transmembrane region Proteins (MCTP). MCTPs
are involved in Ca2+ signaling at the membrane. The cds
in this family contain multiple C2 domains as well as a
C-terminal PRT domain. It is one of four protein
classes that are anchored to membranes via a
transmembrane region; the others being synaptotagmins,
extended synaptotagmins, and ferlins. MCTPs are the only
membrane-bound C2 domain proteins that contain two
functional TMRs. MCTPs are unique in that they bind Ca2+
but not phospholipids. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the third C2
repeat, C2C, and has a type-II topology.
Length = 119
Score = 44.2 bits (105), Expect = 1e-06
Identities = 26/83 (31%), Positives = 43/83 (51%), Gaps = 8/83 (9%)
Query: 46 FTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVP 105
+ V++A L D+ G +DP+ + L A+ +TH +TLNP +N+ F F P
Sbjct: 3 LQVKVIRASGLAAADIGGKSDPFCVLEL-----VNARLQTHTIYKTLNPEWNKIFTF--P 55
Query: 106 ADNLDSVSLELLLLDWDRVTKNE 128
++ V LE+ + D D+ K E
Sbjct: 56 IKDIHDV-LEVTVYDEDKDKKPE 77
>gnl|CDD|176006 cd04041, C2A_fungal, C2 domain first repeat; fungal group. C2
domains were first identified in Protein Kinase C (PKC).
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 111
Score = 43.8 bits (104), Expect = 1e-06
Identities = 30/89 (33%), Positives = 39/89 (43%), Gaps = 18/89 (20%)
Query: 45 RFTIVVLKARNLPKMD-VTGLADPYVKV------YLLYKGQRVAKKKTHVKKRTLNPVYN 97
TI +A +LPK D TG +DPYV LY T + ++ LNPV+
Sbjct: 4 VVTIH--RATDLPKADFGTGSSDPYVTASFAKFGKPLYS--------TRIIRKDLNPVWE 53
Query: 98 ES-FVFEVPADNLDSVSLELLLLDWDRVT 125
E+ FV P + L L D DR T
Sbjct: 54 ETWFVLVTPDEVKAGERLSCRLWDSDRFT 82
>gnl|CDD|176011 cd04046, C2_Calpain, C2 domain present in Calpain proteins. A
single C2 domain is found in calpains (EC 3.4.22.52, EC
3.4.22.53), calcium-dependent, non-lysosomal cysteine
proteases. Caplains are classified as belonging to Clan
CA by MEROPS and include six families: C1, C2, C10, C12,
C28, and C47. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 126
Score = 43.8 bits (104), Expect = 1e-06
Identities = 19/56 (33%), Positives = 30/56 (53%), Gaps = 5/56 (8%)
Query: 47 TIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVF 102
+ V A L K D G ADPYV + +G+ V ++ V+K TL+P ++ +F
Sbjct: 6 QVHVHSAEGLSKQDSGGGADPYVIIKC--EGESV---RSPVQKDTLSPEFDTQAIF 56
>gnl|CDD|176063 cd08681, C2_fungal_Inn1p-like, C2 domain found in fungal Ingression
1 (Inn1) proteins. Saccharomyces cerevisiae Inn1
associates with the contractile actomyosin ring at the
end of mitosis and is needed for cytokinesis. The C2
domain of Inn1, located at the N-terminus, is required
for ingression of the plasma membrane. The C-terminus is
relatively unstructured and contains eight PXXP motifs
that are thought to mediate interaction of Inn1 with
other proteins with SH3 domains in the cytokinesis
proteins Hof1 (an F-BAR protein) and Cyk3 (whose
overexpression can restore primary septum formation in
Inn1Delta cells) as well as recruiting Inn1 to the
bud-neck by binding to Cyk3. Inn1 and Cyk3 appear to
cooperate in activating chitin synthase Chs2 for primary
septum formation, which allows coordination of
actomyosin ring contraction with ingression of the
cleavage furrow. It is thought that the C2 domain of
Inn1 helps to preserve the link between the actomyosin
ring and the plasma membrane, contributing both to
membrane ingression, as well as to stability of the
contracting ring. Additionally, Inn1 might induce
curvature of the plasma membrane adjacent to the
contracting ring, thereby promoting ingression of the
membrane. It has been shown that the C2 domain of human
synaptotagmin induces curvature in target membranes and
thereby contributes to fusion of these membranes with
synaptic vesicles. The C2 domain was first identified in
PKC. C2 domains fold into an 8-standed beta-sandwich
that can adopt 2 structural arrangements: Type I and
Type II, distinguished by a circular permutation
involving their N- and C-terminal beta strands. Many C2
domains are Ca2+-dependent membrane-targeting modules
that bind a wide variety of substances including bind
phospholipids, inositol polyphosphates, and
intracellular proteins. Most C2 domain proteins are
either signal transduction enzymes that contain a single
C2 domain, such as protein kinase C, or membrane
trafficking proteins which contain at least two C2
domains, such as synaptotagmin1. However, there are a
few exceptions to this including RIM isoforms and some
splice variants of piccolo/aczonin and intersectin which
only have a single C2 domain. C2 domains with a calcium
binding region have negatively charged residues,
primarily aspartates, that serve as ligands for calcium
ions.
Length = 118
Score = 43.4 bits (103), Expect = 2e-06
Identities = 22/63 (34%), Positives = 29/63 (46%), Gaps = 10/63 (15%)
Query: 48 IVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVA--KKKTHVKKRT-LNPVYNESFVFEV 104
+VVLKARNLP DPY + R+ KKT R +P ++E FE+
Sbjct: 5 VVVLKARNLPNKRKLDKQDPYCVL-------RIGGVTKKTKTDFRGGQHPEWDEELRFEI 57
Query: 105 PAD 107
D
Sbjct: 58 TED 60
>gnl|CDD|176013 cd04048, C2A_Copine, C2 domain first repeat in Copine. There are 2
copies of the C2 domain present in copine, a protein
involved in membrane trafficking, protein-protein
interactions, and perhaps even cell division and growth.
C2 domains fold into an 8-standed beta-sandwich that
can adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 120
Score = 42.2 bits (100), Expect = 5e-06
Identities = 18/55 (32%), Positives = 27/55 (49%), Gaps = 2/55 (3%)
Query: 51 LKARNLPKMDVTGLADPYVKVYLLYKGQRVAKK--KTHVKKRTLNPVYNESFVFE 103
+ RNL DV +DP+V VY+ G + +T V K LNP + +F +
Sbjct: 7 ISCRNLLDKDVLSKSDPFVVVYVKTGGSGQWVEIGRTEVIKNNLNPDFVTTFTVD 61
>gnl|CDD|176015 cd04050, C2B_Synaptotagmin-like, C2 domain second repeat present in
Synaptotagmin-like proteins. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Previously all synaptotagmins
were thought to be calcium sensors in the regulation of
neurotransmitter release and hormone secretion, but it
has been shown that not all of them bind calcium. Of
the 17 identified synaptotagmins only 8 bind calcium
(1-3, 5-7, 9, 10). The function of the two C2 domains
that bind calcium are: regulating the fusion step of
synaptic vesicle exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 105
Score = 39.5 bits (93), Expect = 4e-05
Identities = 22/71 (30%), Positives = 36/71 (50%), Gaps = 5/71 (7%)
Query: 46 FTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVP 105
+ + A+NLP T PYV++ + G+ +K+ VK+RT NPV+ E F F V
Sbjct: 2 LFVYLDSAKNLPLAKSTKEPSPYVELTV---GK--TTQKSKVKERTNNPVWEEGFTFLVR 56
Query: 106 ADNLDSVSLEL 116
+ +E+
Sbjct: 57 NPENQELEIEV 67
>gnl|CDD|175990 cd04024, C2A_Synaptotagmin-like, C2 domain first repeat present in
Synaptotagmin-like proteins. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Previously all synaptotagmins
were thought to be calcium sensors in the regulation of
neurotransmitter release and hormone secretion, but it
has been shown that not all of them bind calcium. Of
the 17 identified synaptotagmins only 8 bind calcium
(1-3, 5-7, 9, 10). The function of the two C2 domains
that bind calcium are: regulating the fusion step of
synaptic vesicle exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 128
Score = 39.7 bits (93), Expect = 5e-05
Identities = 24/83 (28%), Positives = 39/83 (46%), Gaps = 9/83 (10%)
Query: 48 IVVLKARNLPKMDV--TGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVP 105
+ V++A++L D G +DPY + + G + KT TLNP +N E P
Sbjct: 5 VHVVEAKDLAAKDRSGKGKSDPYAILSV---GA--QRFKTQTIPNTLNPKWNYW--CEFP 57
Query: 106 ADNLDSVSLELLLLDWDRVTKNE 128
+ + L+L+L D DR +
Sbjct: 58 IFSAQNQLLKLILWDKDRFAGKD 80
>gnl|CDD|176074 cd08692, C2B_Tac2-N, C2 domain second repeat found in Tac2-N
(Tandem C2 protein in Nucleus). Tac2-N contains two C2
domains and a short C-terminus including a WHXL motif,
which are key in stabilizing transport vesicles to the
plasma membrane by binding to a plasma membrane.
However unlike the usual carboxyl-terminal-type (C-type)
tandem C2 proteins, it lacks a transmembrane domain, a
Slp-homology domain, and a Munc13-1-interacting domain.
Homology search analysis indicate that no known protein
motifs are located in its N-terminus, making Tac2-N a
novel class of Ca2+-independent, C-type tandem C2
proteins. The C2 domain was first identified in PKC. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 135
Score = 39.1 bits (91), Expect = 1e-04
Identities = 23/74 (31%), Positives = 38/74 (51%), Gaps = 1/74 (1%)
Query: 32 EILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRT 91
E+ L C+Q +R + +L+A+NLP +VKV + G + KKKT + K +
Sbjct: 2 ELQLGTCFQAVNSRIQLQILEAQNLPSSSTPLTLSFFVKVGMFSTGGLLYKKKTRLVKSS 61
Query: 92 LNPV-YNESFVFEV 104
V + E+ +F V
Sbjct: 62 NGQVKWGETMIFPV 75
>gnl|CDD|176072 cd08690, C2_Freud-1, C2 domain found in 5' repressor element under
dual repression binding protein-1 (Freud-1). Freud-1 is
a novel calcium-regulated repressor that negatively
regulates basal 5-HT1A receptor expression in neurons.
It may also play a role in the altered regulation of
5-HT1A receptors associated with anxiety or major
depression. Freud-1 contains two DM-14 basic repeats, a
helix-loop-helix DNA binding domain, and a C2 domain.
The Freud-1 C2 domain is thought to be calcium
insensitive and it lacks several acidic residues that
mediate calcium binding of the PKC C2 domain. In
addition, it contains a poly-basic insert that is not
present in calcium-dependent C2 domains and may function
as a nuclear localization signal. C2 domains fold into
an 8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-II topology.
Length = 155
Score = 38.8 bits (91), Expect = 1e-04
Identities = 20/58 (34%), Positives = 23/58 (39%)
Query: 47 TIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEV 104
TIV LP D YVK Y + KT K T +P YNESF +
Sbjct: 7 TIVRCIGIPLPSGWNPKDLDTYVKFEFPYPNEEPQSGKTSTIKDTNSPEYNESFKLNI 64
>gnl|CDD|176028 cd08382, C2_Smurf-like, C2 domain present in Smad
ubiquitination-related factor (Smurf)-like proteins. A
single C2 domain is found in Smurf proteins,
C2-WW-HECT-domain E3s, which play an important role in
the downregulation of the TGF-beta signaling pathway.
Smurf proteins also regulate cell shape, motility, and
polarity by degrading small guanosine triphosphatases
(GTPases). C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members here have type-II
topology.
Length = 123
Score = 38.1 bits (89), Expect = 2e-04
Identities = 21/56 (37%), Positives = 29/56 (51%), Gaps = 6/56 (10%)
Query: 45 RFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESF 100
R T+ L A L K D+ L DP+ + + GQ T V K+TL+P +NE F
Sbjct: 3 RLTV--LCADGLAKRDLFRLPDPFAVI-TVDGGQ---THSTDVAKKTLDPKWNEHF 52
>gnl|CDD|176024 cd08378, C2B_MCTP_PRT_plant, C2 domain second repeat found in
Multiple C2 domain and Transmembrane region Proteins
(MCTP); plant subset. MCTPs are involved in Ca2+
signaling at the membrane. Plant-MCTPs are composed of
a variable N-terminal sequence, four C2 domains, two
transmembrane regions (TMRs), and a short C-terminal
sequence. It is one of four protein classes that are
anchored to membranes via a transmembrane region; the
others being synaptotagmins, extended synaptotagmins,
and ferlins. MCTPs are the only membrane-bound C2 domain
proteins that contain two functional TMRs. MCTPs are
unique in that they bind Ca2+ but not phospholipids. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 121
Score = 36.9 bits (86), Expect = 4e-04
Identities = 26/79 (32%), Positives = 37/79 (46%), Gaps = 13/79 (16%)
Query: 50 VLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPADNL 109
V+KAR LP DP V+V L G K ++ RT NP +N+ F F D L
Sbjct: 6 VVKARGLP----ANSNDPVVEVKL---GNYKGSTK-AIE-RTSNPEWNQVFAFS--KDRL 54
Query: 110 DSVSLELLLLDWDRVTKNE 128
+LE+ + WD+ +
Sbjct: 55 QGSTLEVSV--WDKDKAKD 71
>gnl|CDD|176010 cd04045, C2C_Tricalbin-like, C2 domain third repeat present in
Tricalbin-like proteins. 5 to 6 copies of the C2 domain
are present in Tricalbin, a yeast homolog of
Synaptotagmin, which is involved in membrane trafficking
and sorting. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the third C2
repeat, C2C, and has a type-II topology.
Length = 120
Score = 36.8 bits (86), Expect = 6e-04
Identities = 21/67 (31%), Positives = 35/67 (52%), Gaps = 5/67 (7%)
Query: 50 VLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPADNL 109
+ KA +L ++ G DPYV+V + + K +T TLNPV++E V + N
Sbjct: 7 IRKANDLKNLEGVGKIDPYVRVLV----NGIVKGRTVTISNTLNPVWDEVLYVPVTSPN- 61
Query: 110 DSVSLEL 116
++LE+
Sbjct: 62 QKITLEV 68
>gnl|CDD|175981 cd04014, C2_PKC_epsilon, C2 domain in Protein Kinase C (PKC)
epsilon. A single C2 domain is found in PKC epsilon.
The PKC family of serine/threonine kinases regulates
apoptosis, proliferation, migration, motility,
chemo-resistance, and differentiation. There are 3
groups: group 1 (alpha, betaI, beta II, gamma) which
require phospholipids and calcium, group 2 (delta,
epsilon, theta, eta) which do not require calcium for
activation, and group 3 (xi, iota/lambda) which are
atypical and can be activated in the absence of
diacylglycerol and calcium. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members here have a type-II
topology.
Length = 132
Score = 36.9 bits (86), Expect = 7e-04
Identities = 16/41 (39%), Positives = 22/41 (53%), Gaps = 4/41 (9%)
Query: 64 LADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEV 104
L DPYV + + + K T K +T +PV+NE F EV
Sbjct: 34 LLDPYVSIDV--DDTHIGK--TSTKPKTNSPVWNEEFTTEV 70
>gnl|CDD|176021 cd08375, C2_Intersectin, C2 domain present in Intersectin. A
single instance of the C2 domain is located C terminally
in the intersectin protein. Intersectin functions as a
scaffolding protein, providing a link between the actin
cytoskeleton and the components of endocytosis and plays
a role in signal transduction. In addition to C2,
intersectin contains several additional domains
including: Eps15 homology domains, SH3 domains, a RhoGEF
domain, and a PH domain. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. The members here have topology
I.
Length = 136
Score = 36.6 bits (85), Expect = 7e-04
Identities = 20/60 (33%), Positives = 31/60 (51%), Gaps = 5/60 (8%)
Query: 45 RFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEV 104
R +V+++ R+L + G +DPY +V + + KT V TLNP +N S F V
Sbjct: 16 RLMVVIVEGRDLKPCNSNGKSDPYCEVSM-----GSQEHKTKVVSDTLNPKWNSSMQFFV 70
>gnl|CDD|176018 cd04054, C2A_Rasal1_RasA4, C2 domain first repeat present in RasA1
and RasA4. Rasal1 and RasA4 are both members of GAP1
(GTPase activating protein 1). Rasal1 responds to
repetitive Ca2+ signals by associating with the plasma
membrane and deactivating Ras. RasA4 suppresses Ras
function by enhancing the GTPase activity of Ras
proteins resulting in the inactive GDP-bound form of
Ras. In this way it can control cellular proliferation
and differentiation. Both of these proteins contains
two C2 domains, a Ras-GAP domain, a plextrin homology
(PH)-like domain, and a Bruton's Tyrosine Kinase (BTK)
zinc binding domain. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 121
Score = 36.3 bits (84), Expect = 0.001
Identities = 19/58 (32%), Positives = 30/58 (51%), Gaps = 4/58 (6%)
Query: 48 IVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVP 105
I +++ +NLP D+TG +DPY V K +T +TLNP + E + +P
Sbjct: 4 IRIVEGKNLPAKDITGSSDPYCIV----KVDNEVIIRTATVWKTLNPFWGEEYTVHLP 57
>gnl|CDD|176017 cd04052, C2B_Tricalbin-like, C2 domain second repeat present in
Tricalbin-like proteins. 5 to 6 copies of the C2 domain
are present in Tricalbin, a yeast homolog of
Synaptotagmin, which is involved in membrane trafficking
and sorting. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 111
Score = 35.7 bits (83), Expect = 0.001
Identities = 20/46 (43%), Positives = 25/46 (54%), Gaps = 4/46 (8%)
Query: 60 DVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVP 105
TGL PY ++YL G+ V T VKK+T NP +N S F V
Sbjct: 8 SKTGLLSPYAELYL--NGKLV--YTTRVKKKTNNPSWNASTEFLVT 49
>gnl|CDD|176041 cd08395, C2C_Munc13, C2 domain third repeat in Munc13 (mammalian
uncoordinated) proteins. C2-like domains are thought to
be involved in phospholipid binding in a Ca2+
independent manner in both Unc13 and Munc13.
Caenorabditis elegans Unc13 has a central domain with
sequence similarity to PKC, which includes C1 and
C2-related domains. Unc13 binds phorbol esters and DAG
with high affinity in a phospholipid manner. Mutations
in Unc13 results in abnormal neuronal connections and
impairment in cholinergic neurotransmission in the
nematode. Munc13 is the mammalian homolog which are
expressed in the brain. There are 3 isoforms (Munc13-1,
-2, -3) and are thought to play a role in
neurotransmitter release and are hypothesized to be
high-affinity receptors for phorbol esters. Unc13 and
Munc13 contain both C1 and C2 domains. There are two C2
related domains present, one central and one at the
carboxyl end. Munc13-1 contains a third C2-like domain.
Munc13 interacts with syntaxin, synaptobrevin, and
synaptotagmin suggesting a role for these as scaffolding
proteins.C2 domains fold into an 8-standed beta-sandwich
that can adopt 2 structural arrangements: Type I and
Type II, distinguished by a circular permutation
involving their N- and C-terminal beta strands. Many C2
domains are Ca2+-dependent membrane-targeting modules
that bind a wide variety of substances including bind
phospholipids, inositol polyphosphates, and
intracellular proteins. Most C2 domain proteins are
either signal transduction enzymes that contain a single
C2 domain, such as protein kinase C, or membrane
trafficking proteins which contain at least two C2
domains, such as synaptotagmin 1. However, there are a
few exceptions to this including RIM isoforms and some
splice variants of piccolo/aczonin and intersectin which
only have a single C2 domain. C2 domains with a calcium
binding region have negatively charged residues,
primarily aspartates, that serve as ligands for calcium
ions. This cd contains the third C2 repeat, C2C, and
has a type-II topology.
Length = 120
Score = 35.5 bits (82), Expect = 0.002
Identities = 22/60 (36%), Positives = 33/60 (55%), Gaps = 7/60 (11%)
Query: 47 TIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKK----THVKKRTLNPVYNESFVF 102
T+ V+ A +L K TG+ P+V+V L+ G ++ KK T K +P YNE+F F
Sbjct: 3 TVKVVAANDL-KWQTTGMFRPFVEVNLI--GPHLSDKKRKFATKSKNNNWSPKYNETFQF 59
>gnl|CDD|176045 cd08400, C2_Ras_p21A1, C2 domain present in RAS p21 protein
activator 1 (RasA1). RasA1 is a GAP1 (GTPase activating
protein 1), a Ras-specific GAP member, which suppresses
Ras function by enhancing the GTPase activity of Ras
proteins resulting in the inactive GDP-bound form of
Ras. In this way it can control cellular proliferation
and differentiation. RasA1 contains a C2 domain, a
Ras-GAP domain, a pleckstrin homology (PH)-like domain,
a SH3 domain, and 2 SH2 domains. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members here have a type-I
topology.
Length = 126
Score = 34.3 bits (79), Expect = 0.005
Identities = 21/67 (31%), Positives = 34/67 (50%), Gaps = 8/67 (11%)
Query: 50 VLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPADNL 109
VL+A LP V PY + L V +T V++ NPV++E FVF+ ++
Sbjct: 10 VLEAHKLPVKHVP---HPYCVISL----NEVKVARTKVRE-GPNPVWSEEFVFDDLPPDV 61
Query: 110 DSVSLEL 116
+S ++ L
Sbjct: 62 NSFTISL 68
>gnl|CDD|175986 cd04019, C2C_MCTP_PRT_plant, C2 domain third repeat found in
Multiple C2 domain and Transmembrane region Proteins
(MCTP); plant subset. MCTPs are involved in Ca2+
signaling at the membrane. Plant-MCTPs are composed of
a variable N-terminal sequence, four C2 domains, two
transmembrane regions (TMRs), and a short C-terminal
sequence. It is one of four protein classes that are
anchored to membranes via a transmembrane region; the
others being synaptotagmins, extended synaptotagmins,
and ferlins. MCTPs are the only membrane-bound C2 domain
proteins that contain two functional TMRs. MCTPs are
unique in that they bind Ca2+ but not phospholipids. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the third C2
repeat, C2C, and has a type-II topology.
Length = 150
Score = 34.6 bits (80), Expect = 0.005
Identities = 24/85 (28%), Positives = 42/85 (49%), Gaps = 14/85 (16%)
Query: 48 IVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVF---EV 104
+ V++A++L D + + +VK L G +V + + + R NP +NE +F E
Sbjct: 4 VTVIEAQDLVPSDKNRVPEVFVKAQL---GNQVLRTRP-SQTRNGNPSWNEELMFVAAEP 59
Query: 105 PADNLDSVSLELLLLDWDRVTKNEA 129
D+L +S+E DRV N+
Sbjct: 60 FEDHL-ILSVE------DRVGPNKD 77
>gnl|CDD|176016 cd04051, C2_SRC2_like, C2 domain present in Soybean genes Regulated
by Cold 2 (SRC2)-like proteins. SRC2 production is a
response to pathogen infiltration. The initial response
of increased Ca2+ concentrations are coupled to
downstream signal transduction pathways via calcium
binding proteins. SRC2 contains a single C2 domain
which localizes to the plasma membrane and is involved
in Ca2+ dependent protein binding. C2 domains fold into
an 8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 125
Score = 33.7 bits (78), Expect = 0.007
Identities = 16/70 (22%), Positives = 29/70 (41%), Gaps = 5/70 (7%)
Query: 48 IVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHV-KKRTLNPVYNESFVFEVPA 106
I ++ A +L +++ G Y V++ + T V + NP +NE+ F +
Sbjct: 4 ITIISAEDLKNVNLFGKMKVYAVVWI-DPSHKQ---STPVDRDGGTNPTWNETLRFPLDE 59
Query: 107 DNLDSVSLEL 116
L L L
Sbjct: 60 RLLQQGRLAL 69
>gnl|CDD|176014 cd04049, C2_putative_Elicitor-responsive_gene, C2 domain present in
the putative elicitor-responsive gene. In plants
elicitor-responsive proteins are triggered in response
to specific elicitor molecules such as glycolproteins,
peptides, carbohydrates and lipids. A host of defensive
responses are also triggered resulting in localized cell
death. Antimicrobial secondary metabolites, such as
phytoalexins, or defense-related proteins, including
pathogenesis-related (PR) proteins are also produced.
There is a single C2 domain present here. C2 domains
fold into an 8-standed beta-sandwich that can adopt 2
structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members have a type-II
topology.
Length = 124
Score = 32.7 bits (75), Expect = 0.019
Identities = 18/58 (31%), Positives = 27/58 (46%), Gaps = 4/58 (6%)
Query: 48 IVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVP 105
++++ A+ L D G DPYV + + Q +K K NP +NE F F V
Sbjct: 5 VLLISAKGLQDTDFLGKIDPYVI--IQCRTQE--RKSKVAKGDGRNPEWNEKFKFTVE 58
>gnl|CDD|175998 cd04032, C2_Perforin, C2 domain of Perforin. Perforin contains a
single copy of a C2 domain in its C-terminus and plays a
role in lymphocyte-mediated cytotoxicity. Mutations in
perforin leads to familial hemophagocytic
lymphohistiocytosis type 2. The function of perforin is
calcium dependent and the C2 domain is thought to confer
this binding to target cell membranes. C2 domains fold
into an 8-standed beta-sandwich that can adopt 2
structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 127
Score = 31.8 bits (73), Expect = 0.034
Identities = 27/83 (32%), Positives = 36/83 (43%), Gaps = 17/83 (20%)
Query: 45 RFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEV 104
T+ VL+A L D D YVKV+ + GQ K+T V NP +N +F
Sbjct: 29 TLTVTVLRATGL-WGDYFTSTDGYVKVF--FGGQE---KRTEVIWNNNNPRWNATF---- 78
Query: 105 PADNLDSVSL----ELLLLDWDR 123
+ SV L +L WDR
Sbjct: 79 ---DFGSVELSPGGKLRFEVWDR 98
>gnl|CDD|176062 cd08680, C2_Kibra, C2 domain found in Human protein Kibra. Kibra
is thought to be a regulator of the Salvador (Sav)/Warts
(Wts)/Hippo (Hpo) (SWH) signaling network, which limits
tissue growth by inhibiting cell proliferation and
promoting apoptosis. The core of the pathway consists of
a MST and LATS family kinase cascade that ultimately
phosphorylates and inactivates the YAP/Yorkie (Yki)
transcription coactivator. The FERM domain proteins
Merlin (Mer) and Expanded (Ex) are part of the upstream
regulation controlling pathway mechanism. Kibra
colocalizes and associates with Mer and Ex and is
thought to transduce an extracellular signal via the SWH
network. The apical scaffold machinery that contains
Hpo, Wts, and Ex recruits Yki to the apical membrane
facilitating its inhibitory phosphorlyation by Wts.
Since Kibra associates with Ex and is apically located
it is hypothesized that KIBRA is part of the scaffold,
helps in the Hpo/Wts complex, and helps recruit Yki for
inactivation that promotes SWH pathway activity. Kibra
contains two amino-terminal WW domains, an internal
C2-like domain, and a carboxy-terminal glutamic
acid-rich stretch. The C2 domain was first identified
in PKC. C2 domains fold into an 8-standed beta-sandwich
that can adopt 2 structural arrangements: Type I and
Type II, distinguished by a circular permutation
involving their N- and C-terminal beta strands. Many C2
domains are Ca2+-dependent membrane-targeting modules
that bind a wide variety of substances including bind
phospholipids, inositol polyphosphates, and
intracellular proteins. Most C2 domain proteins are
either signal transduction enzymes that contain a single
C2 domain, such as protein kinase C, or membrane
trafficking proteins which contain at least two C2
domains, such as synaptotagmin 1. However, there are a
few exceptions to this including RIM isoforms and some
splice variants of piccolo/aczonin and intersectin which
only have a single C2 domain. C2 domains with a calcium
binding region have negatively charged residues,
primarily aspartates, that serve as ligands for calcium
ions.
Length = 124
Score = 31.4 bits (72), Expect = 0.054
Identities = 19/85 (22%), Positives = 36/85 (42%), Gaps = 1/85 (1%)
Query: 33 ILLSLCWQPAANRFTIVVLKARNLPKMDVTGLADPYVKVYLLYKGQRV-AKKKTHVKKRT 91
+ + L + + I V + RNL + + + YV+V LL +T +
Sbjct: 3 VQIGLRYDSGDSSLVISVEQLRNLSALSIPENSKVYVRVALLPCSSSTSCLFRTKALEDQ 62
Query: 92 LNPVYNESFVFEVPADNLDSVSLEL 116
PV+NE F + + L +L++
Sbjct: 63 DKPVFNEVFRVPISSTKLYQKTLQV 87
>gnl|CDD|176009 cd04044, C2A_Tricalbin-like, C2 domain first repeat present in
Tricalbin-like proteins. 5 to 6 copies of the C2 domain
are present in Tricalbin, a yeast homolog of
Synaptotagmin, which is involved in membrane trafficking
and sorting. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-II topology.
Length = 124
Score = 31.4 bits (72), Expect = 0.055
Identities = 20/54 (37%), Positives = 27/54 (50%), Gaps = 4/54 (7%)
Query: 48 IVVLKARNLPKMD-VTGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESF 100
+ + AR L D + G DPYV + R +T VKK T NPV+NE+
Sbjct: 6 VTIKSARGLKGSDIIGGTVDPYVTFSI---SNRRELARTKVKKDTSNPVWNETK 56
>gnl|CDD|175982 cd04015, C2_plant_PLD, C2 domain present in plant phospholipase D
(PLD). PLD hydrolyzes terminal phosphodiester bonds in
diester glycerophospholipids resulting in the
degradation of phospholipids. In vitro PLD transfers
phosphatidic acid to primary alcohols. In plants PLD
plays a role in germination, seedling growth,
phosphatidylinositol metabolism, and changes in
phospholipid composition. There is a single
Ca(2+)/phospholipid-binding C2 domain in PLD. C2 domains
fold into an 8-standed beta-sandwich that can adopt 2
structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 158
Score = 31.5 bits (72), Expect = 0.058
Identities = 20/51 (39%), Positives = 25/51 (49%), Gaps = 5/51 (9%)
Query: 51 LKARNLPKMDVTGLA-DPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESF 100
R V + DPY V L G RVA+ T V + + NPV+NESF
Sbjct: 43 TLKRPSSHRHVGKITSDPYATVDL--AGARVAR--TRVIENSENPVWNESF 89
>gnl|CDD|176068 cd08686, C2_ABR, C2 domain in the Active BCR (Breakpoint cluster
region) Related protein. The ABR protein is similar to
the breakpoint cluster region protein. It has homology
to guanine nucleotide exchange proteins and
GTPase-activating proteins (GAPs). ABR is expressed
primarily in the brain, but also includes non-neuronal
tissues such as the heart. It has been associated with
human diseases such as Miller-Dieker syndrome in which
mental retardation and malformations of the heart are
present. ABR contains a RhoGEF domain and a PH-like
domain upstream of its C2 domain and a RhoGAP domain
downstream of this domain. A few members also contain a
Bcr-Abl oncoprotein oligomerization domain at the very
N-terminal end. Splice variants of ABR have been
identified. ABR is found in a wide variety of organisms
including chimpanzee, dog, mouse, rat, fruit fly, and
mosquito. The C2 domain was first identified in PKC. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 118
Score = 30.9 bits (70), Expect = 0.077
Identities = 14/40 (35%), Positives = 20/40 (50%)
Query: 65 ADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEV 104
A+ Y + + G V K KT V + T P +NE F E+
Sbjct: 15 ANLYCTLEVDSFGYFVKKAKTRVCRDTTEPNWNEEFEIEL 54
>gnl|CDD|176060 cd08678, C2_C21orf25-like, C2 domain found in the Human chromosome
21 open reading frame 25 (C21orf25) protein. The
members in this cd are named after the Human C21orf25
which contains a single C2 domain. Several other
members contain a C1 domain downstream of the C2 domain.
No other information on this protein is currently
known. The C2 domain was first identified in PKC. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 126
Score = 30.8 bits (70), Expect = 0.091
Identities = 20/67 (29%), Positives = 33/67 (49%), Gaps = 8/67 (11%)
Query: 62 TGLADPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPADNLDSVSLELLLLDW 121
G ++PY + + Q K ++ +K T NP ++E F+FE L S ELL +
Sbjct: 15 AGSSNPYCVLEMDEPPQ---KYQSSTQKNTSNPFWDEHFLFE-----LSPNSKELLFEVY 66
Query: 122 DRVTKNE 128
D K++
Sbjct: 67 DNGKKSD 73
>gnl|CDD|176064 cd08682, C2_Rab11-FIP_classI, C2 domain found in Rab11-family
interacting proteins (FIP) class I. Rab GTPases recruit
various effector proteins to organelles and vesicles.
Rab11-family interacting proteins (FIPs) are involved in
mediating the role of Rab11. FIPs can be divided into
three classes: class I FIPs (Rip11a, Rip11b, RCP, and
FIP2) which contain a C2 domain after N-terminus of the
protein, class II FIPs (FIP3 and FIP4) which contain two
EF-hands and a proline rich region, and class III FIPs
(FIP1) which exhibits no homology to known protein
domains. All FIP proteins contain a highly conserved,
20-amino acid motif at the C-terminus of the protein,
known as Rab11/25 binding domain (RBD). Class I FIPs
are thought to bind to endocytic membranes via their C2
domain, which interacts directly with phospholipids.
Class II FIPs do not have any membrane binding domains
leaving much to speculate about the mechanism involving
FIP3 and FIP4 interactions with endocytic membranes. The
members in this CD are class I FIPs. The exact function
of the Rab11 and FIP interaction is unknown, but there
is speculation that it involves the role of forming a
targeting complex that recruits a group of proteins
involved in membrane transport to organelles. The C2
domain was first identified in PKC. C2 domains fold into
an 8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 126
Score = 30.1 bits (68), Expect = 0.17
Identities = 21/60 (35%), Positives = 33/60 (55%), Gaps = 9/60 (15%)
Query: 48 IVVLKARNLPKMDVTGLADPYVKVYLLYKGQRVAKKK--THVKKRTLNPVYNESFVFEVP 105
+ VL+AR L +G D YV + ++ K+K T VK++T +PV+ E FE+P
Sbjct: 3 VTVLQARGLLCKGKSGTNDAYVII-------QLGKEKYSTSVKEKTTSPVWKEECSFELP 55
>gnl|CDD|176046 cd08401, C2A_RasA2_RasA3, C2 domain first repeat present in RasA2
and RasA3. RasA2 and RasA3 are GAP1s (GTPase activating
protein 1s ), Ras-specific GAP members, which suppresses
Ras function by enhancing the GTPase activity of Ras
proteins resulting in the inactive GDP-bound form of
Ras. In this way it can control cellular proliferation
and differentiation. RasA2 and RasA3 are both inositol
1,3,4,5-tetrakisphosphate-binding proteins and contain
an N-terminal C2 domain, a Ras-GAP domain, a
pleckstrin-homology (PH) domain which localizes it to
the plasma membrane, and Bruton's Tyrosine Kinase (BTK)
a zinc binding domain. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 121
Score = 30.1 bits (68), Expect = 0.17
Identities = 8/22 (36%), Positives = 14/22 (63%)
Query: 84 KTHVKKRTLNPVYNESFVFEVP 105
+T +++L P + E F FE+P
Sbjct: 37 RTKTVEKSLCPFFGEDFYFEIP 58
>gnl|CDD|178538 PLN02952, PLN02952, phosphoinositide phospholipase C.
Length = 599
Score = 30.4 bits (68), Expect = 0.27
Identities = 16/51 (31%), Positives = 26/51 (50%)
Query: 66 DPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESFVFEVPADNLDSVSLEL 116
D Y K+Y++ AKKKT + + P +NE F F + L + +E+
Sbjct: 498 DFYTKMYIVGVPADNAKKKTKIIEDNWYPAWNEEFSFPLTVPELALLRIEV 548
>gnl|CDD|175988 cd04021, C2_E3_ubiquitin_ligase, C2 domain present in E3 ubiquitin
ligase. E3 ubiquitin ligase is part of the
ubiquitylation mechanism responsible for controlling
surface expression of membrane proteins. The sequential
action of several enzymes are involved:
ubiquitin-activating enzyme E1, ubiquitin-conjugating
enzyme E2, and ubiquitin-protein ligase E3 which is
responsible for substrate recognition and promoting the
transfer of ubiquitin to the target protein. E3
ubiquitin ligase is composed of an N-terminal C2 domain,
4 WW domains, and a HECTc domain. C2 domains fold into
an 8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 125
Score = 28.4 bits (64), Expect = 0.56
Identities = 18/35 (51%), Positives = 21/35 (60%), Gaps = 4/35 (11%)
Query: 66 DPYVKVYLLYKGQRVAKKKTHVKKRTLNPVYNESF 100
DPYV+V GQ KKT V K+T NP +NE F
Sbjct: 23 DPYVEV--TVDGQ--PPKKTEVSKKTSNPKWNEHF 53
>gnl|CDD|176059 cd08677, C2A_Synaptotagmin-13, C2 domain. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Synaptotagmin 13, a member of
class 6 synaptotagmins, is located in the brain. It
functions are unknown. It, like synaptotagmins 8 and 12,
does not have any consensus Ca2+ binding sites.
Previously all synaptotagmins were thought to be calcium
sensors in the regulation of neurotransmitter release
and hormone secretion, but it has been shown that not
all of them bind calcium. Of the 17 identified
synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10).
The function of the two C2 domains that bind calcium
are: regulating the fusion step of synaptic vesicle
exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This CD contains the first C2
repeat, C2A, and has a type-I topology.
Length = 118
Score = 28.3 bits (63), Expect = 0.75
Identities = 13/44 (29%), Positives = 23/44 (52%)
Query: 84 KTHVKKRTLNPVYNESFVFEVPADNLDSVSLELLLLDWDRVTKN 127
+T +KK L+ + E VF +P + +L L L DR +++
Sbjct: 50 QTALKKLALHTQWEEELVFPLPEEESLDGTLTLTLRCCDRFSRH 93
>gnl|CDD|132934 cd07023, S49_Sppa_N_C, Signal peptide peptidase A (SppA), a serine
protease, has catalytic Ser-Lys dyad. Signal peptide
peptidase A (SppA; Peptidase S49; Protease IV): SppA is
found in all three domains of life and is involved in
the cleavage of signal peptides after their removal from
the precursor proteins by signal peptidases. This
subfamily contains members with either a single domain
(sometimes referred to as 36K type), such as sohB
peptidase, protein C and archaeal signal peptide
peptidase, or an amino-terminal domain in addition to
the carboxyl-terminal protease domain that is conserved
in all the S49 family members (sometimes referred to as
67K type), similar to E. coli and Arabidopsis thaliana
SppA peptidases. Site-directed mutagenesis and sequence
analysis have shown these SppAs to be serine proteases.
The predicted active site serine for members in this
family occurs in a transmembrane domain. Mutagenesis
studies also suggest that the catalytic center comprises
a Ser-Lys dyad and not the usual Ser-His-Asp catalytic
triad found in the majority of serine proteases.
Interestingly, the single membrane spanning E. coli SppA
carries out catalysis using a Ser-Lys dyad with the
serine located in the conserved carboxy-terminal
protease domain and the lysine in the non-conserved
amino-terminal domain.
Length = 208
Score = 27.1 bits (61), Expect = 2.2
Identities = 7/23 (30%), Positives = 12/23 (52%)
Query: 44 NRFTIVVLKARNLPKMDVTGLAD 66
++F VV + R + + LAD
Sbjct: 157 DQFVDVVAEGRGMSGERLDKLAD 179
>gnl|CDD|237915 PRK15123, PRK15123, lipopolysaccharide core heptose(I) kinase RfaP;
Provisional.
Length = 268
Score = 26.5 bits (59), Expect = 4.0
Identities = 11/32 (34%), Positives = 15/32 (46%), Gaps = 2/32 (6%)
Query: 90 RTLNPVYNESFVFEVPADNLDSVSLELLLLDW 121
R NP SF+ + D ++SLE DW
Sbjct: 101 RGSNPATRTSFI--ITEDLAPTISLEDYCADW 130
>gnl|CDD|236039 PRK07522, PRK07522, acetylornithine deacetylase; Provisional.
Length = 385
Score = 26.3 bits (59), Expect = 4.9
Identities = 9/36 (25%), Positives = 14/36 (38%), Gaps = 3/36 (8%)
Query: 49 VVLKARNLPKMDVTGLADP---YVKVYLLYKGQRVA 81
+ RNLP D + Y + LL + + V
Sbjct: 255 FDFEFRNLPGDDPEAILARIRAYAEAELLPEMRAVH 290
>gnl|CDD|213553 TIGR00706, SppA_dom, signal peptide peptidase SppA, 36K type. The
related but duplicated, double-length protein SppA
(protease IV) of E. coli was shown experimentally to
degrade signal peptides as are released by protein
processing and secretion. This protein shows stronger
homology to the C-terminal region of SppA than to the
N-terminal domain or to the related putative protease
SuhB. The member of this family from Bacillus subtilis
was shown to have properties consistent with a role in
degrading signal peptides after cleavage from precursor
proteins, although it was not demonstrated conclusively
[Protein fate, Degradation of proteins, peptides, and
glycopeptides].
Length = 208
Score = 25.4 bits (56), Expect = 8.4
Identities = 11/23 (47%), Positives = 13/23 (56%)
Query: 44 NRFTIVVLKARNLPKMDVTGLAD 66
+F VV K RNLP +V AD
Sbjct: 153 EQFVQVVSKGRNLPVEEVKKFAD 175
>gnl|CDD|225279 COG2421, COG2421, Predicted acetamidase/formamidase [Energy
production and conversion].
Length = 305
Score = 25.4 bits (56), Expect = 10.0
Identities = 9/31 (29%), Positives = 15/31 (48%)
Query: 27 SQGRGEILLSLCWQPAANRFTIVVLKARNLP 57
+QG GE+ + PA + ++K NL
Sbjct: 191 AQGDGEVCGTAIEVPAEVTVKVELIKNLNLE 221
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
0.315 0.130 0.373
Gapped
Lambda K H
0.267 0.0645 0.140
Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 44354
Number of Hits to DB: 6,196,226
Number of extensions: 527175
Number of successful extensions: 482
Number of sequences better than 10.0: 1
Number of HSP's gapped: 419
Number of HSP's successfully gapped: 102
Length of query: 129
Length of database: 10,937,602
Length adjustment: 86
Effective length of query: 43
Effective length of database: 7,123,158
Effective search space: 306295794
Effective search space used: 306295794
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.3 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.6 bits)
S2: 53 (24.4 bits)