RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy6698
(170 letters)
>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 = 234 bits (599), Expect = 1e-80
Identities = 92/137 (67%), Positives = 117/137 (85%)
Query: 30 VAELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVR 89
V ELLLGL YN TGR+ +EVIKGS+F+N+AM +APDTYVKL LL+S GQE+S++KTS+R
Sbjct: 1 VPELLLGLEYNALTGRLSVEVIKGSNFKNLAMNKAPDTYVKLTLLNSDGQEISKSKTSIR 60
Query: 90 RGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEEELAHW 149
RGQP+P FKETFVFQVALF LS+VTL+ SVY+++ +K+K++IGWFSLG NS+ EEE HW
Sbjct: 61 RGQPDPEFKETFVFQVALFQLSEVTLMFSVYNKRKMKRKEMIGWFSLGLNSSGEEEEEHW 120
Query: 150 NEMCKVKGEQLARWHIL 166
NEM + KG+Q+ RWH L
Sbjct: 121 NEMKESKGQQVCRWHTL 137
>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 = 135 bits (343), Expect = 1e-41
Identities = 55/136 (40%), Positives = 79/136 (58%), Gaps = 2/136 (1%)
Query: 31 AELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRR 90
ELLL LSY T R+ + V+K + D YVK+ LL G+++ + KTSV++
Sbjct: 1 GELLLSLSYLPTAERLTVVVLKARNLPPSDGKGLSDPYVKVSLLQG-GKKLKKKKTSVKK 59
Query: 91 GQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEEELAHWN 150
G NP+F E F F V L +V+LV++V D+ S+ + ++IG LG +S EEL HWN
Sbjct: 60 GTLNPVFNEAFSFDVPAEQLEEVSLVITVVDKDSVGRNEVIGQVVLGPDSG-GEELEHWN 118
Query: 151 EMCKVKGEQLARWHIL 166
EM + +ARWH L
Sbjct: 119 EMLASPRKPIARWHKL 134
>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 = 95.2 bits (237), Expect = 9e-26
Identities = 47/135 (34%), Positives = 75/135 (55%), Gaps = 2/135 (1%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRG 91
ELLL L YN T RI + +IK + + + + D YVK+ L+ + + + KT +++
Sbjct: 3 ELLLSLCYNPTANRITVNIIKARNLKAMDINGTSDPYVKVWLMYK-DKRVEKKKTVIKKR 61
Query: 92 QPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEEELAHWNE 151
NP+F E+F+F + L L + TL+++V D+ L + LIG LG S EL HW +
Sbjct: 62 TLNPVFNESFIFNIPLERLRETTLIITVMDKDRLSRNDLIGKIYLGWKSG-GLELKHWKD 120
Query: 152 MCKVKGEQLARWHIL 166
M + +A+WH L
Sbjct: 121 MLSKPRQPVAQWHRL 135
>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 = 90.2 bits (224), Expect = 9e-24
Identities = 48/136 (35%), Positives = 72/136 (52%), Gaps = 2/136 (1%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRG 91
ELLL L Y TT R+ + V+K H + ++ D YVK+ L + +S+ KT V++
Sbjct: 3 ELLLSLCYQPTTNRLTVVVLKARHLPKMDVSGLADPYVKVNLYYG-KKRISKKKTHVKKC 61
Query: 92 QPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEEELAHWNE 151
NP+F E+FVF + L D+++ V D + K ++IG LG S HW E
Sbjct: 62 TLNPVFNESFVFDIPSEELEDISVEFLVLDSDRVTKNEVIGRLVLGP-KASGSGGHHWKE 120
Query: 152 MCKVKGEQLARWHILC 167
+C Q+A WH+LC
Sbjct: 121 VCNPPRRQIAEWHMLC 136
>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 = 85.3 bits (211), Expect = 7e-22
Identities = 43/136 (31%), Positives = 70/136 (51%), Gaps = 3/136 (2%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAK-TSVRR 90
ELLL L+Y + GR+ +++I+ M++ D +VK+ L+ G ++ + K TS R
Sbjct: 2 ELLLSLNYLPSAGRLNVDIIRAKQLLQTDMSQGSDPFVKIQLVH--GLKLIKTKKTSCMR 59
Query: 91 GQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEEELAHWN 150
G +P + E+F F+V L +V+LV +VY IG +GQ S+ E HW
Sbjct: 60 GTIDPFYNESFSFKVPQEELENVSLVFTVYGHNVKSSNDFIGRIVIGQYSSGPSETNHWR 119
Query: 151 EMCKVKGEQLARWHIL 166
M + + +WH L
Sbjct: 120 RMLNSQRTAVEQWHSL 135
>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 = 85.1 bits (211), Expect = 8e-22
Identities = 39/134 (29%), Positives = 66/134 (49%), Gaps = 2/134 (1%)
Query: 33 LLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQ 92
+L+ L YN + + +I+ + + D +VKL L +G++ S+ KT V++
Sbjct: 2 ILVSLMYNTQRRGLIVGIIRCVNLAAMDANGYSDPFVKLYLKPDAGKK-SKHKTQVKKKT 60
Query: 93 PNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEEELAHWNEM 152
NP F E F + + L+ TL ++V+D+ K IG LG N+ E L HW +
Sbjct: 61 LNPEFNEEFFYDIKHSDLAKKTLEITVWDKDIGKSNDYIGGLQLGINA-KGERLRHWLDC 119
Query: 153 CKVKGEQLARWHIL 166
K +++ WH L
Sbjct: 120 LKNPDKKIEAWHTL 133
>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 = 84.9 bits (210), Expect = 9e-22
Identities = 44/135 (32%), Positives = 75/135 (55%), Gaps = 2/135 (1%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRG 91
EL+ L Y T GR+ + +IK + + + +T D YVK+ L+ G+ + + KTSV++
Sbjct: 2 ELMFSLCYLPTAGRLTLTIIKARNLKAMDITGFSDPYVKVSLMCE-GRRLKKKKTSVKKN 60
Query: 92 QPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEEELAHWNE 151
NP + E VF V ++ +V+L+++V D + +LIG +G N+ + HWNE
Sbjct: 61 TLNPTYNEALVFDVPPENVDNVSLIIAVVDYDRVGHNELIGVCRVGPNADGQGR-EHWNE 119
Query: 152 MCKVKGEQLARWHIL 166
M + +A+WH L
Sbjct: 120 MLANPRKPIAQWHQL 134
>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 = 77.4 bits (191), Expect = 7e-19
Identities = 39/135 (28%), Positives = 73/135 (54%), Gaps = 2/135 (1%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRG 91
++ L Y T G++ + +++ + + + + D YVK+ L+ + G+ + + KT++++
Sbjct: 3 DICFSLRYVPTAGKLTVVILEAKNLKKMDVGGLSDPYVKIHLMQN-GKRLKKKKTTIKKR 61
Query: 92 QPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEEELAHWNE 151
NP + E+F F+V + V L+V+V D + K IG LG N+T EL HW++
Sbjct: 62 TLNPYYNESFSFEVPFEQIQKVHLIVTVLDYDRIGKNDPIGKVVLGCNATG-AELRHWSD 120
Query: 152 MCKVKGEQLARWHIL 166
M +A+WH L
Sbjct: 121 MLASPRRPIAQWHTL 135
>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 = 77.1 bits (190), Expect = 1e-18
Identities = 49/140 (35%), Positives = 74/140 (52%), Gaps = 8/140 (5%)
Query: 30 VAELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDT---YVKLMLLSSSGQEMSRAKT 86
V E+LL LSY T R+ + V+K RN+ T +VK+ LL G+++S+ KT
Sbjct: 1 VGEILLSLSYLPTAERLTVVVVKA---RNLVWDNGKTTADPFVKVYLLQD-GRKISKKKT 56
Query: 87 SVRRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEEEL 146
SV+R NP+F E +F V L D++L V+V + K +G +G + S L
Sbjct: 57 SVKRDDTNPIFNEAMIFSVPAIVLQDLSLRVTVAESTEDGKTPNVGHVIIGPAA-SGMGL 115
Query: 147 AHWNEMCKVKGEQLARWHIL 166
+HWN+M + +A WH L
Sbjct: 116 SHWNQMLASLRKPVAMWHPL 135
>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 = 73.5 bits (181), Expect = 3e-17
Identities = 41/137 (29%), Positives = 65/137 (47%), Gaps = 3/137 (2%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRG 91
++ + L+YN T R+ + V++ R + YVK+ L + + KT V G
Sbjct: 3 DIQISLTYNPTLNRLTVVVLRARGLRQLDHAHT-SVYVKVSL-MIHNKVVKTKKTEVVDG 60
Query: 92 QPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQ-NSTSEEELAHWN 150
+P F E+F F+V L +L +SV ++K +L+G LG +EL HWN
Sbjct: 61 AASPSFNESFSFKVTSRQLDTASLSLSVMQSGGVRKSKLLGRVVLGPFMYARGKELEHWN 120
Query: 151 EMCKVKGEQLARWHILC 167
+M E + RWH L
Sbjct: 121 DMLSKPKELIKRWHALG 137
>gnl|CDD|215765 pfam00168, C2, C2 domain.
Length = 85
Score = 67.7 bits (166), Expect = 1e-15
Identities = 28/88 (31%), Positives = 41/88 (46%), Gaps = 5/88 (5%)
Query: 48 IEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVAL 107
+ VI + + D YVK+ L GQ+ KT V + NP++ ETF F+V L
Sbjct: 3 VTVISAKNLPPKDLNGKSDPYVKVSLG---GQKKDTKKTKVVKNTLNPVWNETFTFEVTL 59
Query: 108 FHLSDVTLVVSVYDRKSLKKKQLIGWFS 135
L++ L + VYD K IG +
Sbjct: 60 PELAE--LRIEVYDYDRFGKDDFIGEVT 85
>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 = 64.0 bits (156), Expect = 5e-14
Identities = 23/93 (24%), Positives = 39/93 (41%), Gaps = 5/93 (5%)
Query: 45 RIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQ 104
+ +++I + D YVK+ S G + KT V + NP++ ETF F+
Sbjct: 1 TLTVKIISARNLPPKDKGGKSDPYVKV---SLDGDPKEKKKTKVVKNTLNPVWNETFEFE 57
Query: 105 VALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLG 137
V L + VYD+ + IG ++
Sbjct: 58 V--PPPELAELEIEVYDKDRFGRDDFIGQVTIP 88
>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 = 62.9 bits (153), Expect = 1e-13
Identities = 24/91 (26%), Positives = 38/91 (41%), Gaps = 7/91 (7%)
Query: 46 IFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQV 105
+ + VI+ + + D YVK+ L + KT V + NP++ ETF F V
Sbjct: 1 LRVTVIEARNLPAKDLNGKSDPYVKVSLGGKQ-----KFKTKVVKNTLNPVWNETFEFPV 55
Query: 106 ALFHLSDVTLVVSVYDRKSLKKKQLIGWFSL 136
TL V V+D+ K +G +
Sbjct: 56 --LDPESDTLTVEVWDKDRFSKDDFLGEVEI 84
>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 = 60.7 bits (148), Expect = 2e-12
Identities = 35/104 (33%), Positives = 50/104 (48%), Gaps = 9/104 (8%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAK---TSV 88
+L L Y+ + ++ + +I+ + + M D YVK+ LL + K T V
Sbjct: 4 KLQFSLDYDFQSNQLTVGIIQAADLPAMDMGGTSDPYVKVYLLPD------KKKKFETKV 57
Query: 89 RRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIG 132
R NP+F ETF F+V L + TLV SVYD K LIG
Sbjct: 58 HRKTLNPVFNETFTFKVPYSELGNKTLVFSVYDFDRFSKHDLIG 101
>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 = 56.5 bits (137), Expect = 5e-11
Identities = 31/96 (32%), Positives = 48/96 (50%), Gaps = 6/96 (6%)
Query: 39 YNGTTGRIFIEVIKGSH--FRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPL 96
Y+ ++ + +IK + R + D +VK+ LL + S ++ V+R NP
Sbjct: 9 YDLEEEQLTVSLIKARNLPPRTKDVAH-CDPFVKVCLLPD--ERRSL-QSKVKRKTQNPN 64
Query: 97 FKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIG 132
F ETFVFQV+ L TL +SVYD + +IG
Sbjct: 65 FDETFVFQVSFKELQRRTLRLSVYDVDRFSRHCIIG 100
>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 = 52.7 bits (127), Expect = 2e-09
Identities = 31/101 (30%), Positives = 47/101 (46%), Gaps = 9/101 (8%)
Query: 35 LGLSYNGTTGRIFIEVIKGSHFRNVAMTR--APDTYVKLMLLSSSGQEMSRAKTSVRRGQ 92
L +SY T + + H +N+ + PD YVK LL Q+ ++ KT V R
Sbjct: 6 LSISYKNGTLFVMV-----MHAKNLPLLDGSDPDPYVKTYLLPDP-QKTTKRKTKVVRKT 59
Query: 93 PNPLFKETFVFQ-VALFHLSDVTLVVSVYDRKSLKKKQLIG 132
NP F E V+ + + L L VSV+ SL + + +G
Sbjct: 60 RNPTFNEMLVYDGLPVEDLQQRVLQVSVWSHDSLVENEFLG 100
>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 = 52.3 bits (126), Expect = 3e-09
Identities = 35/106 (33%), Positives = 57/106 (53%), Gaps = 3/106 (2%)
Query: 29 GVAELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSV 88
+ + L + Y+ ++ + V K + + PD YV+L LL + +R KTSV
Sbjct: 1 PLGRIQLTIRYSSQRQKLIVTVHKCRNLPPCDSSDIPDPYVRLYLLPDKSKS-TRRKTSV 59
Query: 89 RRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSL--KKKQLIG 132
++ NP+F ETF F V+L L TL V+V + KS ++K+L+G
Sbjct: 60 KKDNLNPVFDETFEFPVSLEELKRRTLDVAVKNSKSFLSREKKLLG 105
>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 = 51.6 bits (124), Expect = 7e-09
Identities = 39/153 (25%), Positives = 65/153 (42%), Gaps = 34/153 (22%)
Query: 30 VAELLLGLSY------------NGTTGRIFIEVIKGSHFRNVAMTRA---PDTYVKLMLL 74
EL + L Y +TG + + +K + +N+ ++ D++VK LL
Sbjct: 1 RGELKVALKYVPPESEGALKSKKPSTGELHV-WVKEA--KNLPALKSGGTSDSFVKCYLL 57
Query: 75 SSSGQEMSRAKTSVRRGQPNPLFKETFVF-QVALFHLSDVTLVVSVYDRKSLKKKQLIGW 133
++ S+ KT V + NP++ TFV+ V+ LS L ++V+D L +G
Sbjct: 58 PDKSKK-SKQKTPVVKKSVNPVWNHTFVYDGVSPEDLSQACLELTVWDHDKLSSNDFLGG 116
Query: 134 --FSLGQ-----------NSTSEEELAHWNEMC 153
LG +ST EE L W +M
Sbjct: 117 VRLGLGTGKSYGQAVDWMDSTGEEILL-WQKML 148
>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 = 49.4 bits (118), Expect = 3e-08
Identities = 42/140 (30%), Positives = 63/140 (45%), Gaps = 18/140 (12%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSHFRNVAM----TRAPDTYVKLMLLSSSGQEMSRAKTS 87
E+ L YN T + I IK RN+A + YVK+ LL S+ KT+
Sbjct: 3 EIEFALHYNFRTSCLEI-TIKAC--RNLAYGDEKKKKCHPYVKVCLLPDKSHN-SKRKTA 58
Query: 88 VRRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEEELA 147
V++G NP+F ET + V LS L VSV+ ++LK++ +G + LA
Sbjct: 59 VKKGTVNPVFNETLKYVVEADLLSSRQLQVSVWHSRTLKRRVFLGEVLI--------PLA 110
Query: 148 HWNEMCKVKGEQLARWHILC 167
W+ + Q W+ L
Sbjct: 111 DWD--FEDTDSQRFLWYPLN 128
>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 = 49.2 bits (118), Expect = 3e-08
Identities = 31/105 (29%), Positives = 51/105 (48%), Gaps = 8/105 (7%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRA----PDTYVKLMLLSSSGQEMSRAKTS 87
E+ LSYN TG + + + + RN+A + YVK+ LL + S+ KTS
Sbjct: 2 EIEFSLSYNYKTGSLEVHIKEC---RNLAYADEKKKRSNPYVKVYLLPDK-SKQSKRKTS 57
Query: 88 VRRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIG 132
V++ NP+F ET + ++ L TL +SV+ + +G
Sbjct: 58 VKKNTTNPVFNETLKYHISKSQLETRTLQLSVWHHDRFGRNTFLG 102
>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 = 48.1 bits (114), Expect = 1e-07
Identities = 38/137 (27%), Positives = 67/137 (48%), Gaps = 4/137 (2%)
Query: 32 ELLLGLSYNGTTGRIFIEVIK--GSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVR 89
E+LL +SY R+ + VIK H + + D VK+ L + ++ + +T
Sbjct: 3 EVLLSISYLPAANRLLVVVIKAKNLHSDQLKLLLGIDVSVKVTLKHQN-AKLKKKQTKRA 61
Query: 90 RGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEEELAHW 149
+ + NP++ E +F++ L+ ++ + V ++ S + +G SLG + TS E HW
Sbjct: 62 KHKINPVWNEMIMFELPSELLAASSVELEVLNQDSPGQSLPLGRCSLGLH-TSGTERQHW 120
Query: 150 NEMCKVKGEQLARWHIL 166
EM Q+A WH L
Sbjct: 121 EEMLDNPRRQIAMWHQL 137
>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 = 46.9 bits (112), Expect = 2e-07
Identities = 34/102 (33%), Positives = 55/102 (53%), Gaps = 5/102 (4%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRG 91
+L + Y+ + ++ + VI+ A V L+LL S Q RAKT V+RG
Sbjct: 4 DLDVAFEYDPSARKLTVTVIRAQDIPTKDRGGASSWQVHLVLLPSKKQ---RAKTKVQRG 60
Query: 92 QPNPLFKETFVF-QVALFHLSDVTLVVSVYDRKSLKKKQLIG 132
PNP+F ETF F +V L+++ L +Y + ++K++LIG
Sbjct: 61 -PNPVFNETFTFSRVEPEELNNMALRFRLYGVERMRKERLIG 101
>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 = 46.1 bits (109), Expect = 6e-07
Identities = 28/136 (20%), Positives = 61/136 (44%), Gaps = 1/136 (0%)
Query: 31 AELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRR 90
AEL LG + RI +++++ + + + +VK+ + S+ G + V+
Sbjct: 1 AELQLGTCFQAVNSRIQLQILEAQNLPSSSTPLTLSFFVKVGMFSTGGLLYKKKTRLVKS 60
Query: 91 GQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEEELAHWN 150
+ ET +F V + ++ +Y R S+++K +G + +S+S E + W
Sbjct: 61 SNGQVKWGETMIFPVTQQE-HGIQFLIKLYSRSSVRRKHFLGQVWISSDSSSSEAVEQWK 119
Query: 151 EMCKVKGEQLARWHIL 166
+ + + +WH L
Sbjct: 120 DTIANPEKVVTKWHSL 135
>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 = 45.1 bits (107), Expect = 9e-07
Identities = 31/96 (32%), Positives = 50/96 (52%), Gaps = 8/96 (8%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSH---FRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSV 88
E+L LSY+ T + + +K + + A R+ + YVK LL ++ R KTS+
Sbjct: 3 EILFSLSYDYKTQSLNV-HVKECRNLAYGDEAKKRS-NPYVKTYLLPDKSRQSKR-KTSI 59
Query: 89 RRGQPNPLFKETFVFQVALFHLSDVTLVVSV--YDR 122
+R NP++ ET + ++ L TL +SV YDR
Sbjct: 60 KRNTTNPVYNETLKYSISHSQLETRTLQLSVWHYDR 95
>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 = 43.3 bits (103), Expect = 3e-06
Identities = 21/54 (38%), Positives = 29/54 (53%), Gaps = 2/54 (3%)
Query: 85 KTSVRRGQPNPLFKETFVF--QVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSL 136
TSV++G P + E F F + L D + +SVYD +SL+ LIG F L
Sbjct: 35 YTSVKKGTNCPFYNEYFFFNFHESPDELFDKIIKISVYDSRSLRSDTLIGSFKL 88
>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 = 43.2 bits (102), Expect = 6e-06
Identities = 27/101 (26%), Positives = 46/101 (45%), Gaps = 3/101 (2%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRG 91
EL L Y+ G + +++I+ + + + D Y K+ LL ++ + +
Sbjct: 4 ELHFSLEYDKDMGILNVKLIQARNLQPRDFSGTADPYCKVRLLPDRSNTK---QSKIHKK 60
Query: 92 QPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIG 132
NP F E+FVF+V L TL V +YD + + IG
Sbjct: 61 TLNPEFDESFVFEVPPQELPKRTLEVLLYDFDQFSRDECIG 101
>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 = 42.8 bits (101), Expect = 7e-06
Identities = 24/67 (35%), Positives = 34/67 (50%), Gaps = 1/67 (1%)
Query: 66 DTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSL 125
D YVK LL + KTSV++ NP+F ET ++V L L +SV+ R SL
Sbjct: 38 DPYVKTYLLPDKSN-RGKRKTSVKKKTLNPVFNETLRYKVEREELPTRVLNLSVWHRDSL 96
Query: 126 KKKQLIG 132
+ +G
Sbjct: 97 GRNSFLG 103
>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 = 41.4 bits (98), Expect = 2e-05
Identities = 23/92 (25%), Positives = 38/92 (41%), Gaps = 6/92 (6%)
Query: 48 IEVIKGSHFR--NVAMTRAPDTYVKLMLLSSSGQEMSRAKTS-VRRGQPNPLFKETFVFQ 104
I++I G D YV++ + + ++ KT V+ NP++ ETF F
Sbjct: 6 IKIISGQQLPKPKGDKGSIVDPYVEVEIHGLPADDSAKFKTKVVKNNGFNPVWNETFEFD 65
Query: 105 VALFHLSDVTLVVSVYDRKSLKKKQLIGWFSL 136
V + L+ L VYD + +G L
Sbjct: 66 VTVPELA--FLRFVVYD-EDSGDDDFLGQACL 94
>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 = 40.3 bits (95), Expect = 6e-05
Identities = 24/98 (24%), Positives = 42/98 (42%), Gaps = 8/98 (8%)
Query: 48 IEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVAL 107
I +++G + + D YVK L G E ++K + NP + E F L
Sbjct: 4 IVLVEGKNLPPMDDNGLSDPYVKFRL----GNEKYKSKVCSK--TLNPQWLEQFDLH--L 55
Query: 108 FHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEEE 145
F L + V+D+ + KK + IG + ++ E+
Sbjct: 56 FDDQSQILEIEVWDKDTGKKDEFIGRCEIDLSALPREQ 93
>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 = 40.0 bits (94), Expect = 9e-05
Identities = 32/93 (34%), Positives = 46/93 (49%), Gaps = 11/93 (11%)
Query: 66 DTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVF-QVALFHLSDVTL--VVSVYDR 122
D YVKL LL ++ + KT V R NP++ ETF F + L D++L V +DR
Sbjct: 39 DPYVKLQLLP---EKEHKVKTRVLRKTRNPVYDETFTFYGIPYNQLQDLSLHFAVLSFDR 95
Query: 123 KSLKKKQLIG--WFSL-GQNSTSEEELAHWNEM 152
S + +IG L G + +E EL E+
Sbjct: 96 YS--RDDVIGEVVCPLAGADLLNEGELLVSREI 126
>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 = 39.2 bits (92), Expect = 2e-04
Identities = 23/71 (32%), Positives = 34/71 (47%), Gaps = 7/71 (9%)
Query: 62 TRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVALFHLSDVTLVVSVYD 121
R P+ +VK L G ++ R + S R NP + E +F VA D L++SV D
Sbjct: 18 NRVPEVFVKAQL----GNQVLRTRPSQTRN-GNPSWNEELMF-VAAEPFED-HLILSVED 70
Query: 122 RKSLKKKQLIG 132
R K + +G
Sbjct: 71 RVGPNKDEPLG 81
>gnl|CDD|176066 cd08684, C2A_Tac2-N, C2 domain first 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 = 103
Score = 38.3 bits (89), Expect = 2e-04
Identities = 28/88 (31%), Positives = 43/88 (48%), Gaps = 5/88 (5%)
Query: 65 PDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKS 124
P Y+K +L + K+S + G + F ETFVF + L +L V LV + +
Sbjct: 21 PTIYIKGILTLP---KPVHFKSSAKEGSNDIEFMETFVFAIKLQNLQTVRLVFKI--QTQ 75
Query: 125 LKKKQLIGWFSLGQNSTSEEELAHWNEM 152
+K+ IG SL + S +E HW E+
Sbjct: 76 TPRKRTIGECSLSLRTLSTQETDHWLEI 103
>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 = 38.4 bits (90), Expect = 3e-04
Identities = 28/102 (27%), Positives = 44/102 (43%), Gaps = 22/102 (21%)
Query: 66 DTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVALFHLSDVTLVVSV--YDRK 123
D YVKL L+ E ++ KT + NP++ ETF F + D L + V +DR
Sbjct: 35 DPYVKLKLIPDPKNE-TKQKTKTIKKTLNPVWNETFTFDLKPADK-DRRLSIEVWDWDRT 92
Query: 124 S--------------LKKKQLIGWFSLGQNSTSEEELAHWNE 151
+ L K + GW+ L ++EE ++N
Sbjct: 93 TRNDFMGSLSFGVSELIKMPVDGWYKL----LNQEEGEYYNV 130
>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 = 38.3 bits (90), Expect = 3e-04
Identities = 32/113 (28%), Positives = 47/113 (41%), Gaps = 16/113 (14%)
Query: 51 IKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVALFHL 110
+KGS + D YV S S + A+T V++ NP++ ET V
Sbjct: 14 LKGSDI----IGGTVDPYVTF---SISNRREL-ARTKVKKDTSNPVWNETKYILVNSL-- 63
Query: 111 SDVTLVVSVYDRKSLKKKQLIGWF-----SLGQNSTSEEELAHWNEMCKVKGE 158
++ L ++VYD +K +LIG SL QN E + K GE
Sbjct: 64 TEP-LNLTVYDFNDKRKDKLIGTAEFDLSSLLQNPEQENLTKNLLRNGKPVGE 115
>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 = 38.1 bits (89), Expect = 4e-04
Identities = 24/91 (26%), Positives = 42/91 (46%), Gaps = 6/91 (6%)
Query: 37 LSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPL 96
+SY+ + ++++K + D +VK+ LL ++ +T V+R NP
Sbjct: 9 VSYDFQESTLTLKILKAVELPAKDFSGTSDPFVKIYLLPDKKHKL---ETKVKRKNLNPH 65
Query: 97 FKETFVFQ-VALFHLSDVTLVVSV--YDRKS 124
+ ETF+F+ L L + V YDR S
Sbjct: 66 WNETFLFEGFPYEKLQQRVLYLQVLDYDRFS 96
>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 = 37.6 bits (88), Expect = 6e-04
Identities = 29/121 (23%), Positives = 51/121 (42%), Gaps = 2/121 (1%)
Query: 31 AELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRR 90
A++ +GL Y+ + I V + + +++ YV++ LL S +T
Sbjct: 1 AQVQIGLRYDSGDSSLVISVEQLRNLSALSIPENSKVYVRVALLPCSSSTSCLFRTKALE 60
Query: 91 GQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIG--WFSLGQNSTSEEELAH 148
Q P+F E F ++ L TL V V ++++ +G SL +SEE
Sbjct: 61 DQDKPVFNEVFRVPISSTKLYQKTLQVDVCSVGPDQQEECLGGAQISLADFESSEEMSTK 120
Query: 149 W 149
W
Sbjct: 121 W 121
>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 = 37.6 bits (88), Expect = 6e-04
Identities = 21/92 (22%), Positives = 34/92 (36%), Gaps = 8/92 (8%)
Query: 48 IEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSV-RRGQPNPLFKETFVFQV- 105
I +I +NV + Y ++ + T V R G NP + ET F +
Sbjct: 4 ITIISAEDLKNVNLFGKMKVYA---VVWIDP--SHKQSTPVDRDGGTNPTWNETLRFPLD 58
Query: 106 -ALFHLSDVTLVVSVYDRKSLKKKQLIGWFSL 136
L + L + VY + +LIG +
Sbjct: 59 ERLLQQGRLALTIEVYCERPSLGDKLIGEVRV 90
>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 = 37.2 bits (87), Expect = 8e-04
Identities = 18/85 (21%), Positives = 34/85 (40%), Gaps = 5/85 (5%)
Query: 48 IEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVAL 107
I +++ + + + D YV L + + AKT NP + E F + +
Sbjct: 5 IRIVRAENLKADSSNGLSDPYV---TLVDTNGKRRIAKTRTIYDTLNPRWDEEFE--LEV 59
Query: 108 FHLSDVTLVVSVYDRKSLKKKQLIG 132
+ + +V+DR + K L G
Sbjct: 60 PAGEPLWISATVWDRSFVGKHDLCG 84
>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 = 36.8 bits (86), Expect = 0.001
Identities = 25/104 (24%), Positives = 42/104 (40%), Gaps = 15/104 (14%)
Query: 38 SYNGTTGRIFIEVIKGSHFRNVAMTRAPDT------YVKLMLLSSSG-QEMSRAKTSVRR 90
Y + + +E++ + RN+ D+ +VK+ LL ++ KT V++
Sbjct: 10 YYRASEQSLRVEIL---NARNL---LPLDSNGSSDPFVKVELLPRHLFPDVPTPKTQVKK 63
Query: 91 GQPNPLFKETFVFQVALFHLS--DVTLVVSVYDRKSLKKKQLIG 132
PLF E+F F V S L+ +V D L G
Sbjct: 64 KTLFPLFDESFEFNVPPEQCSVEGALLLFTVKDYDLLGSNDFEG 107
>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 = 36.1 bits (84), Expect = 0.002
Identities = 15/61 (24%), Positives = 32/61 (52%), Gaps = 3/61 (4%)
Query: 45 RIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQ 104
+ + V++ ++ + PD YV+L L ++S + +T + NP++ ETF F+
Sbjct: 1 LLTVRVLRATNITKGDLLSTPDCYVELWLPTASD---EKKRTKTIKNSINPVWNETFEFR 57
Query: 105 V 105
+
Sbjct: 58 I 58
>gnl|CDD|227371 COG5038, COG5038, Ca2+-dependent lipid-binding protein, contains C2
domain [General function prediction only].
Length = 1227
Score = 37.8 bits (88), Expect = 0.002
Identities = 29/136 (21%), Positives = 56/136 (41%), Gaps = 16/136 (11%)
Query: 30 VAELLLGLSYNGTTGRIFIEVIKGSHFR--NVAMTRAPDTYVKLMLLSSSGQEMSRAKTS 87
+++++ G S G + +++ + + + D Y+ + KT
Sbjct: 423 ISQIMAGDS-GTAIGVVEVKIKSAEGLKKSDSTINGTVDPYITVTFSDRVI-----GKTR 476
Query: 88 VRRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLG-----QNSTS 142
V++ NP++ ETF + L +D L +S+YD S K +++G L QN
Sbjct: 477 VKKNTLNPVWNETFY--ILLNSFTD-PLNLSLYDFNSFKSDKVVGSTQLDLALLHQNPVK 533
Query: 143 EEELAHWNEMCKVKGE 158
+ EL + K G
Sbjct: 534 KNELYEFLRNTKNVGR 549
>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 = 36.1 bits (84), Expect = 0.002
Identities = 18/77 (23%), Positives = 26/77 (33%), Gaps = 16/77 (20%)
Query: 84 AKTSVRRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIG----------- 132
A+T NP + E FVF ++ TL D++S + +IG
Sbjct: 32 ARTKTVEK-LNPFWGEEFVFDDPPPDVTFFTLSFYNKDKRSKDRDIVIGKVALSKLDLGQ 90
Query: 133 ----WFSLGQNSTSEEE 145
WF L E
Sbjct: 91 GKDEWFPLTPVDPDSEV 107
>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 = 34.5 bits (80), Expect = 0.006
Identities = 20/96 (20%), Positives = 36/96 (37%), Gaps = 11/96 (11%)
Query: 51 IKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSR-AKTSVRRGQPNPLFKETFVFQVALFH 109
I + + + D +V + + + + +T V + NP F TF ++
Sbjct: 7 ISCRNLLDKDVLSKSDPFVVVYVKTGGSGQWVEIGRTEVIKNNLNPDFVTTFTVD---YY 63
Query: 110 LSDVT-LVVSVYD----RKSLKKKQLIGW--FSLGQ 138
+V L VYD K L +G +LG+
Sbjct: 64 FEEVQKLRFEVYDVDSKSKDLSDHDFLGEAECTLGE 99
>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 = 34.0 bits (78), Expect = 0.011
Identities = 36/119 (30%), Positives = 59/119 (49%), Gaps = 9/119 (7%)
Query: 35 LGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPN 94
L LS G ++ + V++ R+ + ++YVK + LS + R KTS N
Sbjct: 3 LKLSIEGQNRKLTLHVLEAKGLRS-TNSGTCNSYVK-ISLSPDKEVRFRQKTSTVPDSAN 60
Query: 95 PLFKETFVFQVALFHLSDVT--LVVSVYDRKSLKKK-QLIGWFSLGQNS-TSEEELAHW 149
PLF ETF F V D L+V+V+++ S + L+G S G S +++E++ W
Sbjct: 61 PLFHETFSFDVN---ERDYQKRLLVTVWNKLSKSRDSGLLGCMSFGVKSIVNQKEISGW 116
>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 = 33.9 bits (78), Expect = 0.015
Identities = 34/126 (26%), Positives = 56/126 (44%), Gaps = 29/126 (23%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSHFR---NVAMTRAPDTYVKLMLLSSSGQEMSRAKTSV 88
++ LGL G++ +EVI+ + AP YVK+ LL + +++ KT +
Sbjct: 19 DIQLGLYD--KKGQLEVEVIRARGLVQKPGSKVLPAP--YVKVYLLEG-KKCIAKKKTKI 73
Query: 89 RRGQPNPLFKETFVFQVALFHLSDVTLVVSVY------DRKS-----------LKKKQL- 130
R +PL+++ VF V+ + TL V V+ D+K L L
Sbjct: 74 ARKTLDPLYQQQLVFDVS---PTGKTLQVIVWGDYGRMDKKVFMGVAQILLDDLDLSNLV 130
Query: 131 IGWFSL 136
IGW+ L
Sbjct: 131 IGWYKL 136
>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 = 33.3 bits (77), Expect = 0.022
Identities = 18/68 (26%), Positives = 28/68 (41%), Gaps = 6/68 (8%)
Query: 65 PDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKS 124
D Y+K+ G++ + + NP+F + F + L S L +SV D
Sbjct: 21 SDPYLKI----KLGKKKINDRDNYIPNTLNPVFGKMFELEATLPGNSI--LKISVMDYDL 74
Query: 125 LKKKQLIG 132
L LIG
Sbjct: 75 LGSDDLIG 82
>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 = 32.9 bits (76), Expect = 0.025
Identities = 22/88 (25%), Positives = 34/88 (38%), Gaps = 7/88 (7%)
Query: 51 IKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVALFHL 110
G D ++++ S G + +T V + NP++K F + L L
Sbjct: 7 FSGKKLDKKDFFGKSDPFLEISRQSEDGTWVLVYRTEVIKNTLNPVWKP---FTIPLQKL 63
Query: 111 ----SDVTLVVSVYDRKSLKKKQLIGWF 134
D + + VYD S K LIG F
Sbjct: 64 CNGDYDRPIKIEVYDYDSSGKHDLIGEF 91
>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 = 32.6 bits (75), Expect = 0.036
Identities = 21/82 (25%), Positives = 36/82 (43%), Gaps = 9/82 (10%)
Query: 51 IKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVALFHL 110
++ + ++ + + PD YV++ + GQ KT V + NP + E F V
Sbjct: 8 VESAKLKSNSKSFKPDPYVEV---TVDGQP--PKKTEVSKKTSNPKWNEHFTVLVTPQS- 61
Query: 111 SDVTLVVSVYDRKSLKKKQLIG 132
TL V+ +LK L+G
Sbjct: 62 ---TLEFKVWSHHTLKADVLLG 80
>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 = 32.3 bits (74), Expect = 0.048
Identities = 17/62 (27%), Positives = 26/62 (41%), Gaps = 2/62 (3%)
Query: 65 PDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQ-VALFHLSDVTLVVSVYDRK 123
D YVKL LL + + ++ +T NP F ET + + + TL + V D
Sbjct: 36 SDPYVKLNLLPGASKA-TKLRTKTVHKTRNPEFNETLTYYGITEEDIQRKTLRLLVLDED 94
Query: 124 SL 125
Sbjct: 95 RF 96
>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 = 31.5 bits (72), Expect = 0.063
Identities = 13/41 (31%), Positives = 19/41 (46%), Gaps = 1/41 (2%)
Query: 85 KTSVRRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSL 125
+TS RR NP+F E F+V H + + V D+
Sbjct: 40 RTSWRRHTLNPVFNERLAFEV-YPHEKNFDIQFKVLDKDKF 79
>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 = 31.2 bits (71), Expect = 0.13
Identities = 17/69 (24%), Positives = 26/69 (37%), Gaps = 15/69 (21%)
Query: 66 DTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVF-------------QVALFHLSD 112
D + ++ L SS + R T V++ NP F E F F +V L
Sbjct: 20 DPFARVTLNYSSKTDTKR--TKVKKKTNNPRFDEAFYFELTIGFSYEKKSFKVEEEDLEK 77
Query: 113 VTLVVSVYD 121
L V ++
Sbjct: 78 SELRVELWH 86
>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 = 30.4 bits (69), Expect = 0.19
Identities = 13/54 (24%), Positives = 25/54 (46%), Gaps = 7/54 (12%)
Query: 81 MSRAKTSVRRGQPNPLFKETFVFQVALFHLSDVT--LVVSVYDRKSLKKKQLIG 132
+ ++S ++ NP + E F+F+ LS + L+ VYD + +G
Sbjct: 30 PQKYQSSTQKNTSNPFWDEHFLFE-----LSPNSKELLFEVYDNGKKSDSKFLG 78
>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 = 29.6 bits (67), Expect = 0.37
Identities = 19/70 (27%), Positives = 29/70 (41%), Gaps = 8/70 (11%)
Query: 65 PDTYVKLMLLSSSGQEMSRAKTSVRRGQ-PNPLFKETFVFQVALFHLSDVT-LVVSVYDR 122
D YV ++ QE K+ V +G NP + E F F V T L++ + D+
Sbjct: 22 IDPYV---IIQCRTQER---KSKVAKGDGRNPEWNEKFKFTVEYPGWGGDTKLILRIMDK 75
Query: 123 KSLKKKQLIG 132
+ IG
Sbjct: 76 DNFSDDDFIG 85
>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 = 29.5 bits (66), Expect = 0.41
Identities = 21/122 (17%), Positives = 48/122 (39%), Gaps = 6/122 (4%)
Query: 32 ELLLGLSYNGTTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRG 91
+L LSY+ + + +++ + A + Y+ + S G A+T++++
Sbjct: 2 KLHYSLSYDKQKAELHVNILEAENISVDA---GCECYISGCVSVSEG--QKEAQTALKKL 56
Query: 92 QPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSLGQNSTSEE-ELAHWN 150
+ ++E VF + D TL +++ + +G L S A W
Sbjct: 57 ALHTQWEEELVFPLPEEESLDGTLTLTLRCCDRFSRHSTLGELRLKLADVSMMLGAAQWV 116
Query: 151 EM 152
++
Sbjct: 117 DL 118
>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 = 29.3 bits (66), Expect = 0.56
Identities = 13/48 (27%), Positives = 25/48 (52%), Gaps = 1/48 (2%)
Query: 66 DTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVALFHLSDV 113
D Y + L+ S+ ++ ++ +T V++ NP F E F F V + +
Sbjct: 20 DPYASVTLIYSNKKQDTK-RTKVKKKTNNPQFDEAFYFDVTIDSSPEK 66
>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 = 28.8 bits (65), Expect = 0.83
Identities = 17/52 (32%), Positives = 30/52 (57%), Gaps = 2/52 (3%)
Query: 83 RAKTSVRRGQPNPLFKETFVFQVA-LFHLSDVTLVVSVY-DRKSLKKKQLIG 132
+ +T + NP++ E VF V+ LS++ L V VY DR+S +++ +G
Sbjct: 33 KKRTRTKPKDLNPVWNEKLVFNVSDPSRLSNLVLEVYVYNDRRSGRRRSFLG 84
>gnl|CDD|215413 PLN02770, PLN02770, haloacid dehalogenase-like hydrolase family
protein.
Length = 248
Score = 29.0 bits (65), Expect = 0.95
Identities = 18/70 (25%), Positives = 33/70 (47%), Gaps = 3/70 (4%)
Query: 32 ELLLGLSYNG---TTGRIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSV 88
E+L +++NG T F+E I G H ++A+ PD + + + + + R S
Sbjct: 46 EMLQEINFNGGVPITEEFFVENIAGKHNEDIALGLFPDDLERGLKFTDDKEALFRKLASE 105
Query: 89 RRGQPNPLFK 98
+ N L+K
Sbjct: 106 QLKPLNGLYK 115
>gnl|CDD|219337 pfam07217, Het-C, Heterokaryon incompatibility protein Het-C. In
filamentous fungi, het loci (for heterokaryon
incompatibility) are believed to regulate
self/nonself-recognition during vegetative growth. As
filamentous fungi grow, hyphal fusion occurs within an
individual colony to form a network. Hyphal fusion can
occur also between different individuals to form a
heterokaryon, in which genetically distinct nuclei
occupy a common cytoplasm. However, heterokaryotic cells
are viable only if the individuals involved have
identical alleles at all het loci.
Length = 602
Score = 29.2 bits (66), Expect = 1.1
Identities = 14/34 (41%), Positives = 18/34 (52%), Gaps = 9/34 (26%)
Query: 2 ELSTGSSEILSLGRSD---------STDSTHSML 26
EL TGSSE++ ++ TD THSML
Sbjct: 431 ELKTGSSEVIDSSANEQFEVWDDPRCTDPTHSML 464
>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 = 27.6 bits (62), Expect = 1.9
Identities = 16/52 (30%), Positives = 29/52 (55%)
Query: 85 KTSVRRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIGWFSL 136
KT V + NP++ ETF + +A D +L + V D + + + +LIG ++
Sbjct: 29 KTRVLENELNPVWNETFEWPLAGSPDPDESLEIVVKDYEKVGRNRLIGSATV 80
>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 = 27.3 bits (61), Expect = 2.2
Identities = 15/39 (38%), Positives = 21/39 (53%), Gaps = 3/39 (7%)
Query: 94 NPLFKETFVFQVALFHLSDVTLVVSVYDRKSLKKKQLIG 132
NP + + F F + H DV L V+VYD KK + +G
Sbjct: 45 NPEWNKIFTFPIKDIH--DV-LEVTVYDEDKDKKPEFLG 80
>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 = 26.9 bits (60), Expect = 3.4
Identities = 21/88 (23%), Positives = 38/88 (43%), Gaps = 18/88 (20%)
Query: 44 GRIFIEVIKGSHFRNVAMTRA--PDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETF 101
G + + V++G+ N+A+ D YV L L G + + KT V + NP++ E
Sbjct: 2 GLLKVRVVRGT---NLAVRDFTSSDPYVVLTL----GNQ--KVKTRVIKKNLNPVWNEEL 52
Query: 102 VFQVALFHLSDVTLVVS--VYDRKSLKK 127
V + + V+D+ + K
Sbjct: 53 TLSV-----PNPMAPLKLEVFDKDTFSK 75
>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 = 26.6 bits (59), Expect = 3.9
Identities = 12/20 (60%), Positives = 15/20 (75%), Gaps = 1/20 (5%)
Query: 84 AKTSVRRGQPNPLFKETFVF 103
A+T VR G PNP++ E FVF
Sbjct: 36 ARTKVREG-PNPVWSEEFVF 54
>gnl|CDD|202401 pfam02799, NMT_C, Myristoyl-CoA:protein N-myristoyltransferase,
C-terminal domain. The N and C-terminal domains of NMT
are structurally similar, each adopting an acyl-CoA
N-acyltransferase-like fold.
Length = 190
Score = 27.1 bits (61), Expect = 4.1
Identities = 18/59 (30%), Positives = 23/59 (38%), Gaps = 20/59 (33%)
Query: 104 QVALFHLSDVTL-----------VVSVYD--RKSLKKKQLIGWFSLGQNSTSEEELAHW 149
V L+ L D T V V+ K LK+ F L T +EE+AHW
Sbjct: 16 MVKLYKLPDETKTPGLRPMKKKDVPQVHKLLNKYLKR------FDLAPVFT-KEEVAHW 67
>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 = 26.8 bits (60), Expect = 4.7
Identities = 19/69 (27%), Positives = 32/69 (46%), Gaps = 7/69 (10%)
Query: 64 APDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRK 123
D YV++ S +GQ + KTSV++ NP + E VF L + + + + D
Sbjct: 34 LVDPYVEV---SFAGQ---KVKTSVKKNSYNPEWNEQIVFPEMFPPLCE-RIKIQIRDWD 86
Query: 124 SLKKKQLIG 132
+ +IG
Sbjct: 87 RVGNDDVIG 95
>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 = 26.5 bits (59), Expect = 4.8
Identities = 20/79 (25%), Positives = 33/79 (41%), Gaps = 12/79 (15%)
Query: 54 SHFRNVA---MTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQVALFHL 110
+A + R PD + + + GQ S T V + +P + E F V
Sbjct: 7 LCADGLAKRDLFRLPDPFAVITV--DGGQTHS---TDVAKKTLDPKWNEHFDLTV---GP 58
Query: 111 SDVTLVVSVYDRKSLKKKQ 129
S + + + V+D+K KKK
Sbjct: 59 SSI-ITIQVFDQKKFKKKD 76
>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 = 26.1 bits (58), Expect = 6.7
Identities = 23/95 (24%), Positives = 35/95 (36%), Gaps = 15/95 (15%)
Query: 45 RIFIEVIKGSHFRNVAMTRAPDTYVKLMLLSSSGQEMSRAKTSVRRGQPNPLFKETFVFQ 104
+++ V+K + D V++ L + G T NP + + F F
Sbjct: 1 YLYVRVVKARGLPANSN----DPVVEVKLGNYKG------STKAIERTSNPEWNQVFAFS 50
Query: 105 VALFHLSDVTLVVSVYDRKSLKKKQLIG--WFSLG 137
L TL VSV+D K K +G F L
Sbjct: 51 KD--RLQGSTLEVSVWD-KDKAKDDFLGGVCFDLS 82
>gnl|CDD|223224 COG0146, HyuB, N-methylhydantoinase B/acetone carboxylase, alpha
subunit [Amino acid transport and metabolism / Secondary
metabolites biosynthesis, transport, and catabolism].
Length = 563
Score = 26.8 bits (60), Expect = 6.9
Identities = 11/25 (44%), Positives = 14/25 (56%), Gaps = 5/25 (20%)
Query: 109 HLSDVTLVVSVYDRKSLKKKQLIGW 133
HL DVTLV V+ +LIG+
Sbjct: 99 HLPDVTLVTPVFHD-----GKLIGY 118
>gnl|CDD|234005 TIGR02774, rexB_recomb, ATP-dependent nuclease subunit B. DNA
repair is accomplished by several different systems in
prokaryotes. Recombinational repair of double-stranded
DNA breaks involves the RecBCD pathway in some lineages,
and AddAB (also called RecAB) in other. The AddA protein
is conserved between the firmicutes and the
alphaproteobacteria, while the partner protein is not.
The partner may be designated AddB, as in Bacillus and
in alphaproteobacteria, or RexB as in Streptococcus and
Lactococcus. Note, however, that RexB proteins lack an
N-terminal GxxGxGK[ST] ATP-binding motif found in
Bacillus subtilis and related species, and this
difference may be important; this model represents
specifically RexB proteins as found in Streptococcus and
Lactococcus [DNA metabolism, DNA replication,
recombination, and repair].
Length = 1076
Score = 26.7 bits (59), Expect = 7.0
Identities = 17/100 (17%), Positives = 43/100 (43%), Gaps = 5/100 (5%)
Query: 68 YVKLMLLSSSGQEMSRAKTSV---RRGQPNPLFKETFVFQVALFHLSDVTLVVSVYDRKS 124
Y L L +S+ +E+ + + + +P +E F V L +L D +
Sbjct: 612 YTMLSLFNSATKELVLSAPQLFNESEDKESPYLQELIDFGVPLREKGMNSLGEDKEDIGN 671
Query: 125 LKK--KQLIGWFSLGQNSTSEEELAHWNEMCKVKGEQLAR 162
K +++ + G+ ++++L W+ + + ++L +
Sbjct: 672 YKALLSRVVAYNQQGEMEMTKQDLTFWSVLVRYLRKKLDQ 711
>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 = 25.5 bits (56), Expect = 9.3
Identities = 14/49 (28%), Positives = 21/49 (42%), Gaps = 5/49 (10%)
Query: 85 KTSVRRGQPNPLFKETFVFQVAL-FHLSDVTLVVSVYDRKSLKKKQLIG 132
+T P F E F F++ F L +YDR L++ +IG
Sbjct: 37 RTKTVEKSLCPFFGEDFYFEIPRTFR----HLSFYIYDRDVLRRDSVIG 81
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
0.318 0.132 0.382
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: 8,282,588
Number of extensions: 731311
Number of successful extensions: 612
Number of sequences better than 10.0: 1
Number of HSP's gapped: 572
Number of HSP's successfully gapped: 76
Length of query: 170
Length of database: 10,937,602
Length adjustment: 90
Effective length of query: 80
Effective length of database: 6,945,742
Effective search space: 555659360
Effective search space used: 555659360
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 (21.7 bits)
S2: 55 (25.1 bits)