RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy12137
(224 letters)
>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 = 196 bits (501), Expect = 8e-65
Identities = 80/133 (60%), Positives = 104/133 (78%), Gaps = 1/133 (0%)
Query: 86 KIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKR-KYKTGVKWKT 144
KI ++L ++T++R LIV +I+C NL MD+NG+SDPF+KLYLKPD K+ K+KT VK KT
Sbjct: 1 KILVSLMYNTQRRGLIVGIIRCVNLAAMDANGYSDPFVKLYLKPDAGKKSKHKTQVKKKT 60
Query: 145 LNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLELCCNSKGDRLRHWVDMM 204
LNP FNEEF + K ++L+K+TL ITVWDKD GKSNDY+G L+L N+KG+RLRHW+D +
Sbjct: 61 LNPEFNEEFFYDIKHSDLAKKTLEITVWDKDIGKSNDYIGGLQLGINAKGERLRHWLDCL 120
Query: 205 KYPDHKHEGIHNL 217
K PD K E H L
Sbjct: 121 KNPDKKIEAWHTL 133
Score = 36.2 bits (84), Expect = 0.004
Identities = 17/43 (39%), Positives = 28/43 (65%), Gaps = 2/43 (4%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYGH-DFLG 42
+T+NPEF+E+ FY + +DL+ ++L I V D D D++G
Sbjct: 59 KTLNPEFNEEF-FYDIKHSDLAKKTLEITVWDKDIGKSNDYIG 100
>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 = 103 bits (259), Expect = 3e-28
Identities = 47/122 (38%), Positives = 71/122 (58%), Gaps = 5/122 (4%)
Query: 91 LCFSTKKR----ALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHK-RKYKTGVKWKTL 145
+CFS + L V +++ NL MD G SDP++K++L + + +K KT +K +TL
Sbjct: 4 ICFSLRYVPTAGKLTVVILEAKNLKKMDVGGLSDPYVKIHLMQNGKRLKKKKTTIKKRTL 63
Query: 146 NPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLELCCNSKGDRLRHWVDMMK 205
NP +NE F+ E ++ K L++TV D D ND +G + L CN+ G LRHW DM+
Sbjct: 64 NPYYNESFSFEVPFEQIQKVHLIVTVLDYDRIGKNDPIGKVVLGCNATGAELRHWSDMLA 123
Query: 206 YP 207
P
Sbjct: 124 SP 125
Score = 27.8 bits (62), Expect = 3.1
Identities = 15/44 (34%), Positives = 25/44 (56%), Gaps = 2/44 (4%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGE 43
RT+NP ++E +F V + L + VLD D+ G +D +G+
Sbjct: 61 RTLNPYYNESFSF-EVPFEQIQKVHLIVTVLDYDRIGKNDPIGK 103
>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 = 100 bits (251), Expect = 5e-27
Identities = 49/124 (39%), Positives = 72/124 (58%), Gaps = 1/124 (0%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHK-RKYKTGVKWK 143
G++ L+L + L V ++K NL P D G SDP++K+ L K +K KT VK
Sbjct: 1 GELLLSLSYLPTAERLTVVVLKARNLPPSDGKGLSDPYVKVSLLQGGKKLKKKKTSVKKG 60
Query: 144 TLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLELCCNSKGDRLRHWVDM 203
TLNP+FNE F+ + +L + +LVITV DKD N+ +G + L +S G+ L HW +M
Sbjct: 61 TLNPVFNEAFSFDVPAEQLEEVSLVITVVDKDSVGRNEVIGQVVLGPDSGGEELEHWNEM 120
Query: 204 MKYP 207
+ P
Sbjct: 121 LASP 124
Score = 32.2 bits (74), Expect = 0.081
Identities = 16/50 (32%), Positives = 25/50 (50%), Gaps = 2/50 (4%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGEARFPLN 49
T+NP F+E +F V L SL I V+D D G ++ +G+ +
Sbjct: 60 GTLNPVFNEAFSF-DVPAEQLEEVSLVITVVDKDSVGRNEVIGQVVLGPD 108
>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 = 99.8 bits (249), Expect = 8e-27
Identities = 53/127 (41%), Positives = 76/127 (59%), Gaps = 7/127 (5%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHK----RKYKTGV 140
G++ L+LC++ + VN+IK NL MD NG SDP++K++L ++K K KT +
Sbjct: 2 GELLLSLCYNPTANRITVNIIKARNLKAMDINGTSDPYVKVWL---MYKDKRVEKKKTVI 58
Query: 141 KWKTLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLELCCNSKGDRLRHW 200
K +TLNP+FNE F + L + TL+ITV DKD ND +G + L S G L+HW
Sbjct: 59 KKRTLNPVFNESFIFNIPLERLRETTLIITVMDKDRLSRNDLIGKIYLGWKSGGLELKHW 118
Query: 201 VDMMKYP 207
DM+ P
Sbjct: 119 KDMLSKP 125
Score = 27.0 bits (60), Expect = 5.7
Identities = 15/45 (33%), Positives = 25/45 (55%), Gaps = 2/45 (4%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGEA 44
RT+NP F+E F ++ L +L I V+D D+ +D +G+
Sbjct: 61 RTLNPVFNESFIF-NIPLERLRETTLIITVMDKDRLSRNDLIGKI 104
>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 = 94.6 bits (236), Expect = 6e-25
Identities = 45/103 (43%), Positives = 61/103 (59%), Gaps = 4/103 (3%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDL-HKRKYKTGVKWK 143
G+I+L S K L V + + NLIPMD NG SDP++KL L PD ++ K KT K
Sbjct: 2 GRIYLK--ISVKDNKLTVEVREAKNLIPMDPNGLSDPYVKLKLIPDPKNETKQKTKTIKK 59
Query: 144 TLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCL 186
TLNP++NE F + K + ++ L I VWD D ND++G L
Sbjct: 60 TLNPVWNETFTFDLKPADKDRR-LSIEVWDWDRTTRNDFMGSL 101
Score = 32.2 bits (74), Expect = 0.079
Identities = 17/51 (33%), Positives = 27/51 (52%), Gaps = 3/51 (5%)
Query: 2 TINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGEARFPLNRL 51
T+NP ++E TF + D + L I V D D+ +DF+G F ++ L
Sbjct: 60 TLNPVWNETFTFD-LKPADKD-RRLSIEVWDWDRTTRNDFMGSLSFGVSEL 108
>gnl|CDD|215765 pfam00168, C2, C2 domain.
Length = 85
Score = 93.1 bits (232), Expect = 7e-25
Identities = 34/88 (38%), Positives = 46/88 (52%), Gaps = 3/88 (3%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKI 159
L V +I NL P D NG SDP++K+ L K KT V TLNP++NE F E +
Sbjct: 1 LRVTVISAKNLPPKDLNGKSDPYVKVSLGGQ-KKDTKKTKVVKNTLNPVWNETFTFE--V 57
Query: 160 TELSKQTLVITVWDKDYGKSNDYLGCLE 187
T L I V+D D +D++G +
Sbjct: 58 TLPELAELRIEVYDYDRFGKDDFIGEVT 85
Score = 42.6 bits (101), Expect = 9e-06
Identities = 17/46 (36%), Positives = 23/46 (50%), Gaps = 4/46 (8%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGEAR 45
T+NP ++E TF L L I V D D++G DF+GE
Sbjct: 43 NTLNPVWNETFTFEVTLP---ELAELRIEVYDYDRFGKDDFIGEVT 85
>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 = 92.9 bits (231), Expect = 1e-24
Identities = 36/89 (40%), Positives = 52/89 (58%), Gaps = 5/89 (5%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKI 159
L V +I+ NL D NG SDP++K+ L K+K+KT V TLNP++NE F +
Sbjct: 1 LRVTVIEARNLPAKDLNGKSDPYVKVSLGG---KQKFKTKVVKNTLNPVWNETFEFP--V 55
Query: 160 TELSKQTLVITVWDKDYGKSNDYLGCLEL 188
+ TL + VWDKD +D+LG +E+
Sbjct: 56 LDPESDTLTVEVWDKDRFSKDDFLGEVEI 84
Score = 41.7 bits (98), Expect = 2e-05
Identities = 18/54 (33%), Positives = 26/54 (48%), Gaps = 4/54 (7%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGEARFPLNRLRP 53
T+NP ++E F D +L + V D D++ DFLGE PL+ L
Sbjct: 41 NTLNPVWNETFEF---PVLDPESDTLTVEVWDKDRFSKDDFLGEVEIPLSELLD 91
>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 = 90.0 bits (224), Expect = 3e-23
Identities = 39/91 (42%), Positives = 58/91 (63%), Gaps = 1/91 (1%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKT 144
GK+ +L + + L V +I+ +L MD G SDP++K+YL PD K+K++T V KT
Sbjct: 3 GKLQFSLDYDFQSNQLTVGIIQAADLPAMDMGGTSDPYVKVYLLPD-KKKKFETKVHRKT 61
Query: 145 LNPIFNEEFAIETKITELSKQTLVITVWDKD 175
LNP+FNE F + +EL +TLV +V+D D
Sbjct: 62 LNPVFNETFTFKVPYSELGNKTLVFSVYDFD 92
Score = 36.9 bits (86), Expect = 0.002
Identities = 20/50 (40%), Positives = 30/50 (60%), Gaps = 2/50 (4%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGEARFPLN 49
+T+NP F+E TF V ++L ++L V D D++ HD +GE R PL
Sbjct: 60 KTLNPVFNETFTF-KVPYSELGNKTLVFSVYDFDRFSKHDLIGEVRVPLL 108
>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 = 88.7 bits (220), Expect = 7e-23
Identities = 38/103 (36%), Positives = 50/103 (48%), Gaps = 5/103 (4%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKI 159
L V +I NL P D G SDP++K+ L D K K KT V TLNP++NE F E +
Sbjct: 2 LTVKIISARNLPPKDKGGKSDPYVKVSLDGD-PKEKKKTKVVKNTLNPVWNETFEFE--V 58
Query: 160 TELSKQTLVITVWDKDYGKSNDYLG--CLELCCNSKGDRLRHW 200
L I V+DKD +D++G + L G R
Sbjct: 59 PPPELAELEIEVYDKDRFGRDDFIGQVTIPLSDLLLGGRHEKL 101
Score = 43.2 bits (102), Expect = 6e-06
Identities = 18/61 (29%), Positives = 27/61 (44%), Gaps = 4/61 (6%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGEARFPLNRLRPHISRDL 59
T+NP ++E F L L I V D D++G DF+G+ PL+ L +
Sbjct: 44 NTLNPVWNETFEFE---VPPPELAELEIEVYDKDRFGRDDFIGQVTIPLSDLLLGGRHEK 100
Query: 60 C 60
Sbjct: 101 L 101
>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 = 87.7 bits (218), Expect = 3e-22
Identities = 38/106 (35%), Positives = 57/106 (53%), Gaps = 5/106 (4%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPD---LHKRKYKTGVK 141
G + + + +++L V ++ NL+P+DSNG SDPF+K+ L P KT VK
Sbjct: 3 GVLTVKAYYRASEQSLRVEILNARNLLPLDSNGSSDPFVKVELLPRHLFPDVPTPKTQVK 62
Query: 142 WKTLNPIFNE--EFAIETKITELSKQTLVITVWDKDYGKSNDYLGC 185
KTL P+F+E EF + + + L+ TV D D SND+ G
Sbjct: 63 KKTLFPLFDESFEFNVPPEQCSVEGALLLFTVKDYDLLGSNDFEGE 108
Score = 27.6 bits (62), Expect = 2.9
Identities = 20/54 (37%), Positives = 27/54 (50%), Gaps = 4/54 (7%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQS--LHILVLDDDKYG-HDFLGEARFPLNRL 51
+T+ P F E F +V S++ L V D D G +DF GEA PLN +
Sbjct: 64 KTLFPLFDESFEF-NVPPEQCSVEGALLLFTVKDYDLLGSNDFEGEAFLPLNDI 116
>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 = 4e-21
Identities = 41/124 (33%), Positives = 64/124 (51%), Gaps = 1/124 (0%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHK-RKYKTGVKWK 143
G++ +LC+ L + +IK NL MD GFSDP++K+ L + + +K KT VK
Sbjct: 1 GELMFSLCYLPTAGRLTLTIIKARNLKAMDITGFSDPYVKVSLMCEGRRLKKKKTSVKKN 60
Query: 144 TLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLELCCNSKGDRLRHWVDM 203
TLNP +NE + + +L+I V D D N+ +G + N+ G HW +M
Sbjct: 61 TLNPTYNEALVFDVPPENVDNVSLIIAVVDYDRVGHNELIGVCRVGPNADGQGREHWNEM 120
Query: 204 MKYP 207
+ P
Sbjct: 121 LANP 124
>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 = 82.3 bits (204), Expect = 3e-20
Identities = 38/88 (43%), Positives = 57/88 (64%), Gaps = 1/88 (1%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKR-KYKTGVKWK 143
G+I LT+ +S++++ LIV + KC NL P DS+ DP+++LYL PD K + KT VK
Sbjct: 3 GRIQLTIRYSSQRQKLIVTVHKCRNLPPCDSSDIPDPYVRLYLLPDKSKSTRRKTSVKKD 62
Query: 144 TLNPIFNEEFAIETKITELSKQTLVITV 171
LNP+F+E F + EL ++TL + V
Sbjct: 63 NLNPVFDETFEFPVSLEELKRRTLDVAV 90
Score = 26.1 bits (58), Expect = 8.5
Identities = 10/30 (33%), Positives = 15/30 (50%), Gaps = 1/30 (3%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILV 30
+NP F E F VS +L ++L + V
Sbjct: 62 DNLNPVFDETFEF-PVSLEELKRRTLDVAV 90
>gnl|CDD|176005 cd04040, C2D_Tricalbin-like, C2 domain fourth repeat present in
Tricalbin-like proteins. 5 to 6 copies of the C2 domain
are present in Tricalbin, a yeast homolog of
Synaptotagmin, which is involved in membrane trafficking
and sorting. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the fifth C2
repeat, C2E, and has a type-II topology.
Length = 115
Score = 81.8 bits (203), Expect = 4e-20
Identities = 33/85 (38%), Positives = 47/85 (55%), Gaps = 5/85 (5%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKI 159
L V++I NL D NG SDPF+K YL ++ +KT KTLNP++NE F + +
Sbjct: 1 LTVDVISAENLPSADRNGKSDPFVKFYLN---GEKVFKTKTIKKTLNPVWNESFEVP--V 55
Query: 160 TELSKQTLVITVWDKDYGKSNDYLG 184
+ L + V+D D G +D LG
Sbjct: 56 PSRVRAVLKVEVYDWDRGGKDDLLG 80
Score = 28.7 bits (65), Expect = 0.95
Identities = 20/64 (31%), Positives = 29/64 (45%), Gaps = 4/64 (6%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYGH-DFLGEARFPLNRLRPHISRDL 59
+T+NP ++E S L + V D D+ G D LG A L+ L P + +L
Sbjct: 41 KTLNPVWNESFEVPVPSRVR---AVLKVEVYDWDRGGKDDLLGSAYIDLSDLEPEETTEL 97
Query: 60 CLNL 63
L L
Sbjct: 98 TLPL 101
>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 = 81.2 bits (201), Expect = 9e-20
Identities = 28/58 (48%), Positives = 46/58 (79%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYGHDFLGEARFPLNRLRPHISRD 58
+T NPEF+E LT+Y ++E D+ ++L +LVLD+D++G+DFLGE R PL +L+P+ ++
Sbjct: 61 KTRNPEFNETLTYYGITEEDIQRKTLRLLVLDEDRFGNDFLGETRIPLKKLKPNQTKQ 118
Score = 80.4 bits (199), Expect = 1e-19
Identities = 38/103 (36%), Positives = 54/103 (52%), Gaps = 5/103 (4%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHK-RKYKTGVKWK 143
G + TL + AL +I+ L MD+NG SDP++KL L P K K +T K
Sbjct: 2 GTLEFTLLYDPANSALHCTIIRAKGLKAMDANGLSDPYVKLNLLPGASKATKLRTKTVHK 61
Query: 144 TLNPIFNEEFAIE-TKITELSKQTLVITVWDKD-YGKSNDYLG 184
T NP FNE ++ ++TL + V D+D +G ND+LG
Sbjct: 62 TRNPEFNETLTYYGITEEDIQRKTLRLLVLDEDRFG--NDFLG 102
>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 = 77.9 bits (192), Expect = 2e-18
Identities = 42/106 (39%), Positives = 60/106 (56%), Gaps = 2/106 (1%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSN-GFSDPFIKLYLKPDLHKR-KYKTGVKW 142
G + L + K R L V++I+C +L D SDP++K YL PD R K KT VK
Sbjct: 2 GSVQFALDYDPKLRELHVHVIQCQDLAAADPKKQRSDPYVKTYLLPDKSNRGKRKTSVKK 61
Query: 143 KTLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLEL 188
KTLNP+FNE + + EL + L ++VW +D N +LG +E+
Sbjct: 62 KTLNPVFNETLRYKVEREELPTRVLNLSVWHRDSLGRNSFLGEVEV 107
Score = 32.8 bits (75), Expect = 0.052
Identities = 18/49 (36%), Positives = 26/49 (53%), Gaps = 2/49 (4%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYGHD-FLGEARFPL 48
+T+NP F+E L Y V +L + L++ V D G + FLGE L
Sbjct: 62 KTLNPVFNETLR-YKVEREELPTRVLNLSVWHRDSLGRNSFLGEVEVDL 109
>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 = 76.7 bits (189), Expect = 7e-18
Identities = 43/138 (31%), Positives = 67/138 (48%), Gaps = 7/138 (5%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKR----KYKTGV 140
G++ L+LC+ L V ++K +L MD +G +DP++K+ L + + K KT V
Sbjct: 2 GELLLSLCYQPTTNRLTVVVLKARHLPKMDVSGLADPYVKVNL---YYGKKRISKKKTHV 58
Query: 141 KWKTLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLELCCNSKGDRLRHW 200
K TLNP+FNE F + EL ++ V D D N+ +G L L + G HW
Sbjct: 59 KKCTLNPVFNESFVFDIPSEELEDISVEFLVLDSDRVTKNEVIGRLVLGPKASGSGGHHW 118
Query: 201 VDMMKYPDHKHEGIHNLS 218
++ P + H L
Sbjct: 119 KEVCNPPRRQIAEWHMLC 136
>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 = 74.6 bits (184), Expect = 2e-17
Identities = 39/106 (36%), Positives = 61/106 (57%), Gaps = 2/106 (1%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDS-NGFSDPFIKLYLKPDLHKR-KYKTGVKW 142
G+I +L ++ K +L V++ +C NL D S+P++K+YL PD K+ K KT VK
Sbjct: 1 GEIEFSLSYNYKTGSLEVHIKECRNLAYADEKKKRSNPYVKVYLLPDKSKQSKRKTSVKK 60
Query: 143 KTLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLEL 188
T NP+FNE ++L +TL ++VW D N +LG +E+
Sbjct: 61 NTTNPVFNETLKYHISKSQLETRTLQLSVWHHDRFGRNTFLGEVEI 106
Score = 42.6 bits (101), Expect = 2e-05
Identities = 20/64 (31%), Positives = 31/64 (48%), Gaps = 2/64 (3%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYGH-DFLGEARFPLNRLRPHISRDL 59
T NP F+E L Y +S++ L ++L + V D++G FLGE PL+ +
Sbjct: 61 NTTNPVFNETLK-YHISKSQLETRTLQLSVWHHDRFGRNTFLGEVEIPLDSWDLDSQQSE 119
Query: 60 CLNL 63
L
Sbjct: 120 WYPL 123
>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 = 71.2 bits (175), Expect = 6e-16
Identities = 38/105 (36%), Positives = 58/105 (55%), Gaps = 2/105 (1%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKT 144
G+I ++ + ++ L + ++K L D +G SDPF+K+YL PD K K +T VK K
Sbjct: 3 GRIQFSVSYDFQESTLTLKILKAVELPAKDFSGTSDPFVKIYLLPD-KKHKLETKVKRKN 61
Query: 145 LNPIFNEEFAIET-KITELSKQTLVITVWDKDYGKSNDYLGCLEL 188
LNP +NE F E +L ++ L + V D D ND +G + L
Sbjct: 62 LNPHWNETFLFEGFPYEKLQQRVLYLQVLDYDRFSRNDPIGEVSL 106
Score = 30.8 bits (70), Expect = 0.25
Identities = 16/50 (32%), Positives = 27/50 (54%), Gaps = 1/50 (2%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGEARFPLN 49
+ +NP ++E F L + L++ VLD D++ +D +GE PLN
Sbjct: 60 KNLNPHWNETFLFEGFPYEKLQQRVLYLQVLDYDRFSRNDPIGEVSLPLN 109
>gnl|CDD|175997 cd04031, C2A_RIM1alpha, C2 domain first repeat contained in
Rab3-interacting molecule (RIM) proteins. RIMs are
believed to organize specialized sites of the plasma
membrane called active zones. They also play a role in
controlling neurotransmitter release, plasticity
processes, as well as memory and learning. RIM contains
an N-terminal zinc finger domain, a PDZ domain, and two
C-terminal C2 domains (C2A, C2B). C2 domains fold into
an 8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members here have a type-I
topology and do not bind Ca2+.
Length = 125
Score = 70.7 bits (174), Expect = 8e-16
Identities = 40/105 (38%), Positives = 59/105 (56%), Gaps = 6/105 (5%)
Query: 84 HGKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDL---HKRKYKTGV 140
G+I + L + LIV +++ +L P D +P++K+YL PD KR+ KT V
Sbjct: 2 TGRIQIQLWYDKVTSQLIVTVLQARDLPPRDDGSLRNPYVKVYLLPDRSEKSKRRTKT-V 60
Query: 141 KWKTLNPIFNEEFAI-ETKITELSKQTLVITVWDKDYGKSNDYLG 184
K KTLNP +N+ F + L ++TL +TVWD D ND+LG
Sbjct: 61 K-KTLNPEWNQTFEYSNVRRETLKERTLEVTVWDYDRDGENDFLG 104
Score = 32.6 bits (75), Expect = 0.051
Identities = 16/44 (36%), Positives = 28/44 (63%), Gaps = 1/44 (2%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGE 43
+T+NPE+++ + +V L ++L + V D D+ G +DFLGE
Sbjct: 62 KTLNPEWNQTFEYSNVRRETLKERTLEVTVWDYDRDGENDFLGE 105
>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 = 69.2 bits (170), Expect = 2e-15
Identities = 36/86 (41%), Positives = 51/86 (59%), Gaps = 8/86 (9%)
Query: 101 IVN--LIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETK 158
+V L++ NL PMD NG SDP++K L KYK+ V KTLNP + E+F +
Sbjct: 1 VVTIVLVEGKNLPPMDDNGLSDPYVKFRLG----NEKYKSKVCSKTLNPQWLEQF--DLH 54
Query: 159 ITELSKQTLVITVWDKDYGKSNDYLG 184
+ + Q L I VWDKD GK ++++G
Sbjct: 55 LFDDQSQILEIEVWDKDTGKKDEFIG 80
>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 = 69.3 bits (170), Expect = 6e-15
Identities = 41/117 (35%), Positives = 59/117 (50%), Gaps = 15/117 (12%)
Query: 107 CTNLIPMDSNGFSDPFIKLYLKPDLHKR-KYKTGVKWKTLNPIFNEEFAIE-TKITELSK 164
NL + S G SD F+K YL PD K+ K KT V K++NP++N F + +LS+
Sbjct: 36 AKNLPALKSGGTSDSFVKCYLLPDKSKKSKQKTPVVKKSVNPVWNHTFVYDGVSPEDLSQ 95
Query: 165 QTLVITVWDKDYGKSNDYLGCLELCC-------------NSKGDRLRHWVDMMKYPD 208
L +TVWD D SND+LG + L +S G+ + W M+ P+
Sbjct: 96 ACLELTVWDHDKLSSNDFLGGVRLGLGTGKSYGQAVDWMDSTGEEILLWQKMLDNPN 152
Score = 31.9 bits (73), Expect = 0.12
Identities = 17/47 (36%), Positives = 25/47 (53%), Gaps = 1/47 (2%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGEARF 46
+++NP ++ + VS DLS L + V D DK +DFLG R
Sbjct: 73 KSVNPVWNHTFVYDGVSPEDLSQACLELTVWDHDKLSSNDFLGGVRL 119
>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 = 67.5 bits (165), Expect = 2e-14
Identities = 38/121 (31%), Positives = 56/121 (46%), Gaps = 1/121 (0%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHK-RKYKTGVKWK 143
G+I L+L + L V ++K NL+ + +DPF+K+YL D K K KT VK
Sbjct: 2 GEILLSLSYLPTAERLTVVVVKARNLVWDNGKTTADPFVKVYLLQDGRKISKKKTSVKRD 61
Query: 144 TLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLELCCNSKGDRLRHWVDM 203
NPIFNE L +L +TV + +G + + + G L HW M
Sbjct: 62 DTNPIFNEAMIFSVPAIVLQDLSLRVTVAESTEDGKTPNVGHVIIGPAASGMGLSHWNQM 121
Query: 204 M 204
+
Sbjct: 122 L 122
>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 = 66.1 bits (162), Expect = 3e-14
Identities = 35/91 (38%), Positives = 49/91 (53%), Gaps = 6/91 (6%)
Query: 90 TLCFSTKKRA----LIVNLIKCTNLIP-MDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKT 144
L FS + L V+LIK NL P DPF+K+ L PD +R ++ VK KT
Sbjct: 2 RLWFSVQYDLEEEQLTVSLIKARNLPPRTKDVAHCDPFVKVCLLPD-ERRSLQSKVKRKT 60
Query: 145 LNPIFNEEFAIETKITELSKQTLVITVWDKD 175
NP F+E F + EL ++TL ++V+D D
Sbjct: 61 QNPNFDETFVFQVSFKELQRRTLRLSVYDVD 91
Score = 35.7 bits (83), Expect = 0.005
Identities = 22/64 (34%), Positives = 31/64 (48%), Gaps = 6/64 (9%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGEARFPLNRLRP----HI 55
+T NP F E F VS +L ++L + V D D++ H +G FPL L +
Sbjct: 59 KTQNPNFDETFVF-QVSFKELQRRTLRLSVYDVDRFSRHCIIGHVLFPLKDLDLVKGGVV 117
Query: 56 SRDL 59
RDL
Sbjct: 118 WRDL 121
>gnl|CDD|227371 COG5038, COG5038, Ca2+-dependent lipid-binding protein, contains C2
domain [General function prediction only].
Length = 1227
Score = 69.8 bits (171), Expect = 8e-14
Identities = 42/93 (45%), Positives = 52/93 (55%), Gaps = 5/93 (5%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKI 159
L + L NL D NG+SDPF+KL+L K YKT V KTLNP++NEEF IE +
Sbjct: 1042 LTIMLRSGENLPSSDENGYSDPFVKLFLN---EKSVYKTKVVKKTLNPVWNEEFTIE--V 1096
Query: 160 TELSKQTLVITVWDKDYGKSNDYLGCLELCCNS 192
K L I V D D G+ ND LG E+ +
Sbjct: 1097 LNRVKDVLTINVNDWDSGEKNDLLGTAEIDLSK 1129
Score = 36.7 bits (85), Expect = 0.008
Identities = 24/74 (32%), Positives = 37/74 (50%), Gaps = 8/74 (10%)
Query: 116 NGFSDPFIKLYLKPDLHKR-KYKTGVKWKTLNPIFNEEFAIETKITELSKQTLVITVWDK 174
NG DP+I + R KT VK TLNP++NE F I + L ++++D
Sbjct: 456 NGTVDPYITV----TFSDRVIGKTRVKKNTLNPVWNETFYI---LLNSFTDPLNLSLYDF 508
Query: 175 DYGKSNDYLGCLEL 188
+ KS+ +G +L
Sbjct: 509 NSFKSDKVVGSTQL 522
Score = 30.9 bits (70), Expect = 0.62
Identities = 26/92 (28%), Positives = 40/92 (43%), Gaps = 14/92 (15%)
Query: 93 FSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKR-KYKTGVKWKTLNPIFNE 151
+ T A+ V++ K +L G SDP Y ++ KY+T TLNPI+NE
Sbjct: 706 YDTPIGAIRVSVRKANDLRNEIPGGKSDP----YATVLVNNLVKYRTIYGSSTLNPIWNE 761
Query: 152 EF--AIETKITELSKQTLVITVWDKDYGKSND 181
+ +K +T+ DY +S D
Sbjct: 762 ILYVPVTSKNQ-------RLTLECMDYEESGD 786
>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 = 64.6 bits (158), Expect = 2e-13
Identities = 40/122 (32%), Positives = 61/122 (50%), Gaps = 10/122 (8%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHK-RKYKTGVKWK 143
G++ L++ S K L V ++ NL +D + DP++K YL PD K K KT V K
Sbjct: 2 GQVKLSI--SYKNGTLFVMVMHAKNLPLLDGSD-PDPYVKTYLLPDPQKTTKRKTKVVRK 58
Query: 144 TLNPIFNEEFAIE-TKITELSKQTLVITVWDKDYGKSNDYLG--CLELCCNSKGDRLRHW 200
T NP FNE + + +L ++ L ++VW D N++LG C+ L K D +
Sbjct: 59 TRNPTFNEMLVYDGLPVEDLQQRVLQVSVWSHDSLVENEFLGGVCIPL---KKLDLSQET 115
Query: 201 VD 202
Sbjct: 116 EK 117
Score = 30.0 bits (68), Expect = 0.41
Identities = 22/69 (31%), Positives = 31/69 (44%), Gaps = 7/69 (10%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGEARFPLNRLRPHISRDL 59
+T NP F+E L + + DL + L + V D ++FLG PL +L DL
Sbjct: 58 KTRNPTFNEMLVYDGLPVEDLQQRVLQVSVWSHDSLVENEFLGGVCIPLKKL------DL 111
Query: 60 CLNLCKHYP 68
K YP
Sbjct: 112 SQETEKWYP 120
>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 = 64.5 bits (157), Expect = 2e-13
Identities = 38/122 (31%), Positives = 62/122 (50%), Gaps = 2/122 (1%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYK-TGVKWK 143
G++ L+L + L V++I+ L+ D + SDPF+K+ L L K K T
Sbjct: 1 GELLLSLNYLPSAGRLNVDIIRAKQLLQTDMSQGSDPFVKIQLVHGLKLIKTKKTSCMRG 60
Query: 144 TLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLELCCNSKG-DRLRHWVD 202
T++P +NE F+ + EL +LV TV+ + SND++G + + S G HW
Sbjct: 61 TIDPFYNESFSFKVPQEELENVSLVFTVYGHNVKSSNDFIGRIVIGQYSSGPSETNHWRR 120
Query: 203 MM 204
M+
Sbjct: 121 ML 122
>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 = 64.3 bits (157), Expect = 2e-13
Identities = 31/71 (43%), Positives = 50/71 (70%), Gaps = 2/71 (2%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMD-SNGFSDPFIKLYLKPDLHKRKYKTGVKWK 143
G +F +L ++++K+AL+VN+I+C +L MD +G SDP++KL L P+ + K KT V K
Sbjct: 3 GTLFFSLRYNSEKKALLVNIIECRDLPAMDEQSGTSDPYVKLQLLPE-KEHKVKTRVLRK 61
Query: 144 TLNPIFNEEFA 154
T NP+++E F
Sbjct: 62 TRNPVYDETFT 72
Score = 42.7 bits (101), Expect = 2e-05
Identities = 21/65 (32%), Positives = 29/65 (44%), Gaps = 1/65 (1%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYGHD-FLGEARFPLNRLRPHISRDL 59
+T NP + E TFY + L SLH VL D+Y D +GE PL +L
Sbjct: 61 KTRNPVYDETFTFYGIPYNQLQDLSLHFAVLSFDRYSRDDVIGEVVCPLAGADLLNEGEL 120
Query: 60 CLNLC 64
++
Sbjct: 121 LVSRE 125
>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 = 62.4 bits (152), Expect = 1e-12
Identities = 37/104 (35%), Positives = 58/104 (55%), Gaps = 1/104 (0%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKT 144
G++ +L + L V LI+ NL P D +G +DP+ K+ L PD K ++ + KT
Sbjct: 3 GELHFSLEYDKDMGILNVKLIQARNLQPRDFSGTADPYCKVRLLPDRSNTK-QSKIHKKT 61
Query: 145 LNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLEL 188
LNP F+E F E EL K+TL + ++D D ++ +G +EL
Sbjct: 62 LNPEFDESFVFEVPPQELPKRTLEVLLYDFDQFSRDECIGVVEL 105
Score = 37.0 bits (86), Expect = 0.002
Identities = 16/49 (32%), Positives = 27/49 (55%), Gaps = 2/49 (4%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYG-HDFLGEARFPL 48
+T+NPEF E F V +L ++L +L+ D D++ + +G PL
Sbjct: 60 KTLNPEFDESFVF-EVPPQELPKRTLEVLLYDFDQFSRDECIGVVELPL 107
>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 = 61.3 bits (149), Expect = 2e-12
Identities = 37/110 (33%), Positives = 63/110 (57%), Gaps = 2/110 (1%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMD-SNGFSDPFIKLYLKPDLHKR-KYKTGVKW 142
G+I +L + K ++L V++ +C NL D + S+P++K YL PD ++ K KT +K
Sbjct: 2 GEILFSLSYDYKTQSLNVHVKECRNLAYGDEAKKRSNPYVKTYLLPDKSRQSKRKTSIKR 61
Query: 143 KTLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLELCCNS 192
T NP++NE ++L +TL ++VW D N +LG +E+ +S
Sbjct: 62 NTTNPVYNETLKYSISHSQLETRTLQLSVWHYDRFGRNTFLGEVEIPLDS 111
Score = 40.1 bits (94), Expect = 1e-04
Identities = 19/49 (38%), Positives = 30/49 (61%), Gaps = 2/49 (4%)
Query: 2 TINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYGHD-FLGEARFPLN 49
T NP ++E L YS+S + L ++L + V D++G + FLGE PL+
Sbjct: 63 TTNPVYNETLK-YSISHSQLETRTLQLSVWHYDRFGRNTFLGEVEIPLD 110
>gnl|CDD|176058 cd08676, C2A_Munc13-like, C2 domain first repeat in Munc13
(mammalian uncoordinated)-like proteins. C2-like
domains are thought to be involved in phospholipid
binding in a Ca2+ independent manner in both Unc13 and
Munc13. Caenorabditis elegans Unc13 has a central domain
with sequence similarity to PKC, which includes C1 and
C2-related domains. Unc13 binds phorbol esters and DAG
with high affinity in a phospholipid manner. Mutations
in Unc13 results in abnormal neuronal connections and
impairment in cholinergic neurotransmission in the
nematode. Munc13 is the mammalian homolog which are
expressed in the brain. There are 3 isoforms (Munc13-1,
-2, -3) and are thought to play a role in
neurotransmitter release and are hypothesized to be
high-affinity receptors for phorbol esters. Unc13 and
Munc13 contain both C1 and C2 domains. There are two C2
related domains present, one central and one at the
carboxyl end. Munc13-1 contains a third C2-like domain.
Munc13 interacts with syntaxin, synaptobrevin, and
synaptotagmin suggesting a role for these as scaffolding
proteins. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 153
Score = 60.5 bits (147), Expect = 1e-11
Identities = 35/118 (29%), Positives = 53/118 (44%), Gaps = 31/118 (26%)
Query: 96 KKRALIVNLIKCTNLIPMDSNGFSDPFIKL-------------YLKPDLHKRK------- 135
L V +I+ L+ D NGFSDP+ L K H++K
Sbjct: 26 PIFVLKVTVIEAKGLLAKDVNGFSDPYCMLGIVPASRERNSEKSKKRKSHRKKAVLKDTV 85
Query: 136 -----YKTGVKWKTLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLEL 188
T VK +TLNP++NE F E + ++S L + +WD D +D+LGC+ +
Sbjct: 86 PAKSIKVTEVKPQTLNPVWNETFRFE--VEDVSNDQLHLDIWDHD----DDFLGCVNI 137
>gnl|CDD|176007 cd04042, C2A_MCTP_PRT, C2 domain first repeat found in Multiple C2
domain and Transmembrane region Proteins (MCTP). MCTPs
are involved in Ca2+ signaling at the membrane. MCTP is
composed of a variable N-terminal sequence, three C2
domains, two transmembrane regions (TMRs), and a short
C-terminal sequence. It is one of four protein classes
that are anchored to membranes via a transmembrane
region; the others being synaptotagmins, extended
synaptotagmins, and ferlins. MCTPs are the only
membrane-bound C2 domain proteins that contain two
functional TMRs. MCTPs are unique in that they bind Ca2+
but not phospholipids. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-II topology.
Length = 121
Score = 56.9 bits (138), Expect = 9e-11
Identities = 29/85 (34%), Positives = 46/85 (54%), Gaps = 6/85 (7%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKI 159
L ++L + NL D G SDP++K K YK+ +K LNP+++E+F +
Sbjct: 2 LDIHLKEGRNLAARDRGGTSDPYVKFKYG---GKTVYKSKTIYKNLNPVWDEKFTL---P 55
Query: 160 TELSKQTLVITVWDKDYGKSNDYLG 184
E Q L I V+D D G ++D++G
Sbjct: 56 IEDVTQPLYIKVFDYDRGLTDDFMG 80
>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 = 57.0 bits (138), Expect = 2e-10
Identities = 34/126 (26%), Positives = 59/126 (46%), Gaps = 3/126 (2%)
Query: 87 IFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHK--RKYKTGVKWKT 144
+ L L ++ L V +IK +N + N D ++KL L + K KT ++
Sbjct: 4 LLLGLEYNALTGRLSVEVIKGSNFKNLAMNKAPDTYVKLTLLNSDGQEISKSKTSIRRGQ 63
Query: 145 LNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLELCCNSKG-DRLRHWVDM 203
+P F E F + + +LS+ TL+ +V++K K + +G L NS G + HW +M
Sbjct: 64 PDPEFKETFVFQVALFQLSEVTLMFSVYNKRKMKRKEMIGWFSLGLNSSGEEEEEHWNEM 123
Query: 204 MKYPDH 209
+
Sbjct: 124 KESKGQ 129
>gnl|CDD|176037 cd08391, C2A_C2C_Synaptotagmin_like, C2 domain first and third
repeat in Synaptotagmin-like proteins. Synaptotagmin is
a membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Previously all synaptotagmins
were thought to be calcium sensors in the regulation of
neurotransmitter release and hormone secretion, but it
has been shown that not all of them bind calcium. Of
the 17 identified synaptotagmins only 8 bind calcium
(1-3, 5-7, 9, 10). The function of the two C2 domains
that bind calcium are: regulating the fusion step of
synaptic vesicle exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains either the
first or third repeat in Synaptotagmin-like proteins
with a type-I topology.
Length = 121
Score = 55.0 bits (133), Expect = 5e-10
Identities = 26/93 (27%), Positives = 49/93 (52%), Gaps = 13/93 (13%)
Query: 102 VNLIKCTNLIPMDSN------GFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAI 155
+++I+ +L+ D G SDP++ + + + +K+ V + LNP +NE +
Sbjct: 5 IHVIEAQDLVAKDKFVGGLVKGKSDPYVIVRVGA----QTFKSKVIKENLNPKWNEVY-- 58
Query: 156 ETKITELSKQTLVITVWDKDYGKSNDYLGCLEL 188
E + E+ Q L I ++D+D K D+LG L +
Sbjct: 59 EAVVDEVPGQELEIELFDEDPDKD-DFLGRLSI 90
>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 = 54.1 bits (131), Expect = 1e-09
Identities = 31/83 (37%), Positives = 42/83 (50%), Gaps = 10/83 (12%)
Query: 105 IKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKY---KTGVKWKTLNPIFNEEFAIETKITE 161
++ NL P D NG SDP YLK L K+K + TLNP+F + F +E +
Sbjct: 7 VRARNLQPKDPNGKSDP----YLKIKLGKKKINDRDNYIP-NTLNPVFGKMFELEATLPG 61
Query: 162 LSKQTLVITVWDKDYGKSNDYLG 184
S L I+V D D S+D +G
Sbjct: 62 NS--ILKISVMDYDLLGSDDLIG 82
>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 = 53.3 bits (129), Expect = 2e-09
Identities = 28/90 (31%), Positives = 39/90 (43%), Gaps = 9/90 (10%)
Query: 105 IKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTG---VKWKTLNPIFNEEFAIETKITE 161
I C NL+ D SDPF+ +Y+K + + G V LNP F F ++ E
Sbjct: 7 ISCRNLLDKDVLSKSDPFVVVYVKTGGSGQWVEIGRTEVIKNNLNPDFVTTFTVDYYFEE 66
Query: 162 LSKQTLVITVWDKD----YGKSNDYLGCLE 187
Q L V+D D +D+LG E
Sbjct: 67 --VQKLRFEVYDVDSKSKDLSDHDFLGEAE 94
Score = 33.3 bits (77), Expect = 0.030
Identities = 18/52 (34%), Positives = 21/52 (40%), Gaps = 8/52 (15%)
Query: 2 TINPEFHEKLTFYSVSETDLSLQSLHILVLDDDK-----YGHDFLGEARFPL 48
+NP+F T E +Q L V D D HDFLGEA L
Sbjct: 49 NLNPDFVTTFTVDYYFEE---VQKLRFEVYDVDSKSKDLSDHDFLGEAECTL 97
>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 = 50.8 bits (122), Expect = 2e-08
Identities = 30/98 (30%), Positives = 44/98 (44%), Gaps = 14/98 (14%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFA----- 154
L V +++C +L + SNG DPF ++ L +T VK KT NP F+E F
Sbjct: 1 LSVRVLECRDL-ALKSNGTCDPFARVTLNYSSKTDTKRTKVKKKTNNPRFDEAFYFELTI 59
Query: 155 ---IETKIT-----ELSKQTLVITVWDKDYGKSNDYLG 184
E K +L K L + +W +D+LG
Sbjct: 60 GFSYEKKSFKVEEEDLEKSELRVELWHASMVSGDDFLG 97
Score = 34.3 bits (79), Expect = 0.017
Identities = 20/65 (30%), Positives = 25/65 (38%), Gaps = 13/65 (20%)
Query: 1 RTINPEFHEKLTF------------YSVSETDLSLQSLHILVLDDDKYGHD-FLGEARFP 47
+T NP F E F + V E DL L + + D FLGE R P
Sbjct: 43 KTNNPRFDEAFYFELTIGFSYEKKSFKVEEEDLEKSELRVELWHASMVSGDDFLGEVRIP 102
Query: 48 LNRLR 52
L L+
Sbjct: 103 LQGLQ 107
>gnl|CDD|176021 cd08375, C2_Intersectin, C2 domain present in Intersectin. A
single instance of the C2 domain is located C terminally
in the intersectin protein. Intersectin functions as a
scaffolding protein, providing a link between the actin
cytoskeleton and the components of endocytosis and plays
a role in signal transduction. In addition to C2,
intersectin contains several additional domains
including: Eps15 homology domains, SH3 domains, a RhoGEF
domain, and a PH domain. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. The members here have topology
I.
Length = 136
Score = 50.1 bits (120), Expect = 4e-08
Identities = 28/85 (32%), Positives = 53/85 (62%), Gaps = 6/85 (7%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKI 159
L+V +++ +L P +SNG SDP+ ++ + +++KT V TLNP +N +++ +
Sbjct: 17 LMVVIVEGRDLKPCNSNGKSDPYCEV----SMGSQEHKTKVVSDTLNPKWN--SSMQFFV 70
Query: 160 TELSKQTLVITVWDKDYGKSNDYLG 184
+L + L ITV+D+D+ +D+LG
Sbjct: 71 KDLEQDVLCITVFDRDFFSPDDFLG 95
>gnl|CDD|175984 cd04017, C2D_Ferlin, C2 domain fourth repeat in Ferlin. Ferlins
are involved in vesicle fusion events. Ferlins and
other proteins, such as Synaptotagmins, are implicated
in facilitating the fusion process when cell membranes
fuse together. There are six known human Ferlins:
Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin
(Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these
genes can lead to a wide range of diseases including
muscular dystrophy (dysferlin), deafness (otoferlin),
and infertility (fer-1, fertilization factor-1).
Structurally they have 6 tandem C2 domains, designated
as (C2A-C2F) and a single C-terminal transmembrane
domain, though there is a new study that disputes this
and claims that there are actually 7 tandem C2 domains
with another C2 domain inserted between C2D and C2E.
In a subset of them (Dysferlin, Myoferlin, and Fer1)
there is an additional conserved domain called DysF. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the fourth C2
repeat, C2D, and has a type-II topology.
Length = 135
Score = 49.1 bits (118), Expect = 9e-08
Identities = 20/83 (24%), Positives = 46/83 (55%), Gaps = 11/83 (13%)
Query: 109 NLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNE-----EFAIETKITELS 163
+L+ D +G SDPF ++ L++ + +T V +TL+P +++ E + E++
Sbjct: 12 DLLAADKSGLSDPFARVSF---LNQSQ-ETEVIKETLSPTWDQTLIFDEVELYGSPEEIA 67
Query: 164 KQ--TLVITVWDKDYGKSNDYLG 184
+ +V+ ++D+D +++LG
Sbjct: 68 QNPPLVVVELFDQDSVGKDEFLG 90
>gnl|CDD|176023 cd08377, C2C_MCTP_PRT, C2 domain third repeat found in Multiple C2
domain and Transmembrane region Proteins (MCTP). MCTPs
are involved in Ca2+ signaling at the membrane. The cds
in this family contain multiple C2 domains as well as a
C-terminal PRT domain. It is one of four protein
classes that are anchored to membranes via a
transmembrane region; the others being synaptotagmins,
extended synaptotagmins, and ferlins. MCTPs are the only
membrane-bound C2 domain proteins that contain two
functional TMRs. MCTPs are unique in that they bind Ca2+
but not phospholipids. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the third C2
repeat, C2C, and has a type-II topology.
Length = 119
Score = 48.4 bits (116), Expect = 1e-07
Identities = 30/89 (33%), Positives = 45/89 (50%), Gaps = 9/89 (10%)
Query: 99 ALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETK 158
L V +I+ + L D G SDPF L +L + +T +KTLNP +N+ F K
Sbjct: 2 FLQVKVIRASGLAAADIGGKSDPFCVL----ELVNARLQTHTIYKTLNPEWNKIFTFPIK 57
Query: 159 -ITELSKQTLVITVWDKDYGKSNDYLGCL 186
I L +TV+D+D K ++LG +
Sbjct: 58 DIH----DVLEVTVYDEDKDKKPEFLGKV 82
>gnl|CDD|176070 cd08688, C2_KIAA0528-like, C2 domain found in the Human KIAA0528
cDNA clone. The members of this CD are named after the
Human KIAA0528 cDNA clone. All members here contain a
single C2 repeat. No other information on this protein
is currently known. The C2 domain was first identified
in PKC. C2 domains fold into an 8-standed beta-sandwich
that can adopt 2 structural arrangements: Type I and
Type II, distinguished by a circular permutation
involving their N- and C-terminal beta strands. Many C2
domains are Ca2+-dependent membrane-targeting modules
that bind a wide variety of substances including bind
phospholipids, inositol polyphosphates, and
intracellular proteins. Most C2 domain proteins are
either signal transduction enzymes that contain a single
C2 domain, such as protein kinase C, or membrane
trafficking proteins which contain at least two C2
domains, such as synaptotagmin 1. However, there are a
few exceptions to this including RIM isoforms and some
splice variants of piccolo/aczonin and intersectin which
only have a single C2 domain. C2 domains with a calcium
binding region have negatively charged residues,
primarily aspartates, that serve as ligands for calcium
ions.
Length = 110
Score = 47.7 bits (114), Expect = 2e-07
Identities = 30/93 (32%), Positives = 46/93 (49%), Gaps = 6/93 (6%)
Query: 102 VNLIKCTNLIPMD-SNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFN-EEFAIETKI 159
V ++ +L MD S+ +D F+++ YKT V K+LNP++N E F E
Sbjct: 3 VRVVAARDLPVMDRSSDLTDAFVEVKFG----STTYKTDVVKKSLNPVWNSEWFRFEVDD 58
Query: 160 TELSKQTLVITVWDKDYGKSNDYLGCLELCCNS 192
EL + L I V D D +ND +G + + N
Sbjct: 59 EELQDEPLQIRVMDHDTYSANDAIGKVYIDLNP 91
>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 = 47.3 bits (113), Expect = 4e-07
Identities = 27/76 (35%), Positives = 40/76 (52%), Gaps = 3/76 (3%)
Query: 109 NLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKITELSKQTLV 168
NL SNG SDP++ L + + +R KT + TLNP ++EEF +E E +
Sbjct: 12 NLKADSSNGLSDPYVTL-VDTNGKRRIAKTRTIYDTLNPRWDEEFELEVPAGE--PLWIS 68
Query: 169 ITVWDKDYGKSNDYLG 184
TVWD+ + +D G
Sbjct: 69 ATVWDRSFVGKHDLCG 84
>gnl|CDD|175990 cd04024, C2A_Synaptotagmin-like, C2 domain first repeat present in
Synaptotagmin-like proteins. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Previously all synaptotagmins
were thought to be calcium sensors in the regulation of
neurotransmitter release and hormone secretion, but it
has been shown that not all of them bind calcium. Of
the 17 identified synaptotagmins only 8 bind calcium
(1-3, 5-7, 9, 10). The function of the two C2 domains
that bind calcium are: regulating the fusion step of
synaptic vesicle exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 128
Score = 46.6 bits (111), Expect = 6e-07
Identities = 29/95 (30%), Positives = 44/95 (46%), Gaps = 10/95 (10%)
Query: 99 ALIVNLIKCTNLIPMD--SNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIE 156
L V++++ +L D G SDP+ L + +++KT TLNP +N + E
Sbjct: 2 VLRVHVVEAKDLAAKDRSGKGKSDPYAILSVG----AQRFKTQTIPNTLNPKWN--YWCE 55
Query: 157 TKITELSKQTLVITVWDKDYGKSNDYLG--CLELC 189
I Q L + +WDKD DYLG + L
Sbjct: 56 FPIFSAQNQLLKLILWDKDRFAGKDYLGEFDIALE 90
Score = 27.0 bits (60), Expect = 4.7
Identities = 15/48 (31%), Positives = 26/48 (54%), Gaps = 4/48 (8%)
Query: 2 TINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKY-GHDFLGEARFPL 48
T+NP+++ F S + Q L +++ D D++ G D+LGE L
Sbjct: 45 TLNPKWNYWCEFPIFSAQN---QLLKLILWDKDRFAGKDYLGEFDIAL 89
>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 = 46.4 bits (110), Expect = 8e-07
Identities = 33/102 (32%), Positives = 49/102 (48%), Gaps = 2/102 (1%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFS-DPFIKLYLKPD-LHKRKYKTGVKW 142
G+I L ++ + L + + C NL D P++K+ L PD H K KT VK
Sbjct: 2 GEIEFALHYNFRTSCLEITIKACRNLAYGDEKKKKCHPYVKVCLLPDKSHNSKRKTAVKK 61
Query: 143 KTLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLG 184
T+NP+FNE + LS + L ++VW K +LG
Sbjct: 62 GTVNPVFNETLKYVVEADLLSSRQLQVSVWHSRTLKRRVFLG 103
>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 = 45.7 bits (109), Expect = 8e-07
Identities = 28/89 (31%), Positives = 42/89 (47%), Gaps = 9/89 (10%)
Query: 100 LIVNLIKCTNLIP---MDSNGFS-DPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAI 155
+ + + T+L P M GF DPF+ + +R ++T + TLNP+FNE A
Sbjct: 3 VFMEIKSITDLPPLKNMTRTGFDMDPFVII----SFGRRVFRTSWRRHTLNPVFNERLAF 58
Query: 156 ETKITELSKQTLVITVWDKDYGKSNDYLG 184
E E + + V DKD NDY+
Sbjct: 59 EVYPHEKNFD-IQFKVLDKDKFSFNDYVA 86
Score = 38.0 bits (89), Expect = 5e-04
Identities = 15/51 (29%), Positives = 26/51 (50%), Gaps = 3/51 (5%)
Query: 2 TINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKY-GHDFLGEARFPLNRL 51
T+NP F+E+L F V + + + VLD DK+ +D++ + L
Sbjct: 47 TLNPVFNERLAF-EVYPHEKNF-DIQFKVLDKDKFSFNDYVATGSLSVQEL 95
>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 = 45.6 bits (109), Expect = 1e-06
Identities = 30/101 (29%), Positives = 48/101 (47%), Gaps = 10/101 (9%)
Query: 97 KRALIVNLIKCTNLIPMDSNGFS--DPFIKLYLK--PDLHKRKYKTG-VKWKTLNPIFNE 151
L + +I L + S DP++++ + P K+KT VK NP++NE
Sbjct: 1 PLTLTIKIISGQQLPKPKGDKGSIVDPYVEVEIHGLPADDSAKFKTKVVKNNGFNPVWNE 60
Query: 152 EFAIETKITELSKQTLVITVWDKDYGKSNDYLG--CLELCC 190
F + + EL+ L V+D+D G +D+LG CL L
Sbjct: 61 TFEFDVTVPELA--FLRFVVYDEDSGD-DDFLGQACLPLDS 98
Score = 45.2 bits (108), Expect = 2e-06
Identities = 19/50 (38%), Positives = 28/50 (56%), Gaps = 3/50 (6%)
Query: 4 NPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYGHDFLGEARFPLNRLRP 53
NP ++E F V+ +L+ L +V D+D DFLG+A PL+ LR
Sbjct: 55 NPVWNETFEF-DVTVPELAF--LRFVVYDEDSGDDDFLGQACLPLDSLRQ 101
>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 = 45.8 bits (109), Expect = 1e-06
Identities = 32/127 (25%), Positives = 58/127 (45%), Gaps = 6/127 (4%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLK--PDLHKRKYKTGVKW 142
G I ++L ++ L V +++ L +D + ++K+ L + K K KT V
Sbjct: 2 GDIQISLTYNPTLNRLTVVVLRARGLRQLDHAH-TSVYVKVSLMIHNKVVKTK-KTEVVD 59
Query: 143 KTLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLEL--CCNSKGDRLRHW 200
+P FNE F+ + +L +L ++V + + LG + L ++G L HW
Sbjct: 60 GAASPSFNESFSFKVTSRQLDTASLSLSVMQSGGVRKSKLLGRVVLGPFMYARGKELEHW 119
Query: 201 VDMMKYP 207
DM+ P
Sbjct: 120 NDMLSKP 126
>gnl|CDD|175991 cd04025, C2B_RasA1_RasA4, C2 domain second repeat present in RasA1
and RasA4. RasA1 and RasA4 are GAP1s (GTPase activating
protein 1s ), Ras-specific GAP members, which suppresses
Ras function by enhancing the GTPase activity of Ras
proteins resulting in the inactive GDP-bound form of
Ras. In this way it can control cellular proliferation
and differentiation. Both proteins contain two C2
domains, a Ras-GAP domain, a plextrin homology
(PH)-like domain, and a Bruton's Tyrosine Kinase (BTK)
zinc binding domain. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 123
Score = 45.2 bits (107), Expect = 2e-06
Identities = 27/76 (35%), Positives = 41/76 (53%), Gaps = 6/76 (7%)
Query: 109 NLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKITELSKQTLV 168
+L P D NG SDPF++++ + +T V K+ P +NE F E ++ E + L
Sbjct: 11 DLAPKDRNGTSDPFVRVFYN----GQTLETSVVKKSCYPRWNEVF--EFELMEGADSPLS 64
Query: 169 ITVWDKDYGKSNDYLG 184
+ VWD D ND+LG
Sbjct: 65 VEVWDWDLVSKNDFLG 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 = 44.6 bits (106), Expect = 5e-06
Identities = 29/85 (34%), Positives = 43/85 (50%), Gaps = 8/85 (9%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKI 159
L V +++ TNL D SDP++ L L +K KT V K LNP++NEE + +
Sbjct: 4 LKVRVVRGTNLAVRDFTS-SDPYVVLTLG----NQKVKTRVIKKNLNPVWNEELTL--SV 56
Query: 160 TELSKQTLVITVWDKDYGKSNDYLG 184
L + V+DKD +D +G
Sbjct: 57 PNPMAP-LKLEVFDKDTFSKDDSMG 80
Score = 33.1 bits (76), Expect = 0.049
Identities = 15/49 (30%), Positives = 24/49 (48%), Gaps = 5/49 (10%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKY-GHDFLGEARFPL 48
+ +NP ++E+LT S + L + V D D + D +GEA L
Sbjct: 42 KNLNPVWNEELTL---SVPNPMAP-LKLEVFDKDTFSKDDSMGEAEIDL 86
>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 = 43.9 bits (104), Expect = 6e-06
Identities = 27/88 (30%), Positives = 47/88 (53%), Gaps = 8/88 (9%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNE--EFAIET 157
L+V ++ +L+P D G S +++L D +K +T K K LNP++NE F + +
Sbjct: 2 LVVEVVDAQDLMPKDGQGSSSAYVEL----DFDGQKKRTRTKPKDLNPVWNEKLVFNV-S 56
Query: 158 KITELSKQTLVITVW-DKDYGKSNDYLG 184
+ LS L + V+ D+ G+ +LG
Sbjct: 57 DPSRLSNLVLEVYVYNDRRSGRRRSFLG 84
Score = 29.6 bits (67), Expect = 0.68
Identities = 18/57 (31%), Positives = 26/57 (45%), Gaps = 4/57 (7%)
Query: 1 RTINPEFHEKLTFYSVSET-DLSLQSLHILVLDD--DKYGHDFLGEARFPLNRLRPH 54
+ +NP ++EKL F +VS+ LS L + V +D FLG R P
Sbjct: 41 KDLNPVWNEKLVF-NVSDPSRLSNLVLEVYVYNDRRSGRRRSFLGRVRISGTSFVPP 96
>gnl|CDD|176006 cd04041, C2A_fungal, C2 domain first repeat; fungal group. C2
domains were first identified in Protein Kinase C (PKC).
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 111
Score = 43.4 bits (103), Expect = 7e-06
Identities = 25/91 (27%), Positives = 44/91 (48%), Gaps = 3/91 (3%)
Query: 100 LIVNLIKCTNLIPMDSNGF-SDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETK 158
L+V + + T+L D SDP++ K Y T + K LNP++ E + +
Sbjct: 3 LVVTIHRATDLPKADFGTGSSDPYVTASFAKF-GKPLYSTRIIRKDLNPVWEETWFVLVT 61
Query: 159 ITEL-SKQTLVITVWDKDYGKSNDYLGCLEL 188
E+ + + L +WD D ++D LG +E+
Sbjct: 62 PDEVKAGERLSCRLWDSDRFTADDRLGRVEI 92
>gnl|CDD|175999 cd04033, C2_NEDD4_NEDD4L, C2 domain present in the Human neural
precursor cell-expressed, developmentally down-regulated
4 (NEDD4) and NEDD4-like (NEDD4L/NEDD42). Nedd4 and
Nedd4-2 are two of the nine members of the Human Nedd4
family. All vertebrates appear to have both Nedd4 and
Nedd4-2 genes. They are thought to participate in the
regulation of epithelial Na+ channel (ENaC) activity.
They also have identical specificity for ubiquitin
conjugating enzymes (E2). Nedd4 and Nedd4-2 are
composed of a C2 domain, 2-4 WW domains, and a ubiquitin
ligase Hect domain. Their WW domains can bind PPxY (PY)
or LPSY motifs, and in vitro studies suggest that WW3
and WW4 of both proteins bind PY motifs in the key
substrates, with WW3 generally exhibiting higher
affinity. Most Nedd4 family members, especially Nedd4-2,
also have multiple splice variants, which might play
different roles in regulating their substrates. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 133
Score = 39.6 bits (93), Expect = 2e-04
Identities = 29/92 (31%), Positives = 47/92 (51%), Gaps = 6/92 (6%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYL-KPDLHKR--KYKTGVKWKTLNPIFNEEFAIE 156
L V ++ +L D G SDP++K+ L PD + +T KTLNP +NEEF
Sbjct: 2 LRVKVLAGIDLAKKDIFGASDPYVKISLYDPDGNGEIDSVQTKTIKKTLNPKWNEEFFFR 61
Query: 157 TKITELSKQTLVITVWDKDYGKSNDYLGCLEL 188
+ L+ V+D++ +D+LG +E+
Sbjct: 62 VNP---REHRLLFEVFDENRLTRDDFLGQVEV 90
>gnl|CDD|176020 cd08374, C2F_Ferlin, C2 domain sixth 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 sixth C2
repeat, C2E, and has a type-II topology.
Length = 133
Score = 40.0 bits (94), Expect = 2e-04
Identities = 30/110 (27%), Positives = 47/110 (42%), Gaps = 28/110 (25%)
Query: 106 KCTNLIPMDSN----GFSDPFIKLYLKPDLHKRKYKTGVKWKTLN--PIFNEEF------ 153
+++ D+N SD ++K +L L + K KT V +++L+ FN F
Sbjct: 8 NTRDVLNDDTNITGEKMSDIYVKGWLDG-LEEDKQKTDVHYRSLDGEGNFNWRFVFPFDY 66
Query: 154 -AIETKITELSKQT--------------LVITVWDKDYGKSNDYLGCLEL 188
E KI + K+ L + VWD D +D+LG LEL
Sbjct: 67 LPAEKKIVVIKKEHFWSLDETEYKIPPKLTLQVWDNDKFSPDDFLGSLEL 116
>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 = 39.2 bits (91), Expect = 3e-04
Identities = 32/127 (25%), Positives = 57/127 (44%), Gaps = 3/127 (2%)
Query: 84 HGKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGF--SDPFIKLYLKPDLHKRKYKTGVK 141
G++ L++ + L+V +IK NL D +K+ LK K K K +
Sbjct: 1 TGEVLLSISYLPAANRLLVVVIKAKNLHSDQLKLLLGIDVSVKVTLKHQNAKLKKKQTKR 60
Query: 142 WK-TLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLELCCNSKGDRLRHW 200
K +NP++NE E L+ ++ + V ++D + LG L ++ G +HW
Sbjct: 61 AKHKINPVWNEMIMFELPSELLAASSVELEVLNQDSPGQSLPLGRCSLGLHTSGTERQHW 120
Query: 201 VDMMKYP 207
+M+ P
Sbjct: 121 EEMLDNP 127
>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 = 38.3 bits (90), Expect = 4e-04
Identities = 21/86 (24%), Positives = 36/86 (41%), Gaps = 9/86 (10%)
Query: 105 IKCTNLIPMDSNGFSDPFIKLYLKPDLHKRK--YKTGVKWKTLNPIFNEEFAIETKITEL 162
L D G SDPF+++ + + Y+T V TLNP++ + +L
Sbjct: 7 FSGKKLDKKDFFGKSDPFLEISRQSEDGTWVLVYRTEVIKNTLNPVWKP---FTIPLQKL 63
Query: 163 SK----QTLVITVWDKDYGKSNDYLG 184
+ + I V+D D +D +G
Sbjct: 64 CNGDYDRPIKIEVYDYDSSGKHDLIG 89
>gnl|CDD|175993 cd04027, C2B_Munc13, C2 domain second repeat in Munc13 (mammalian
uncoordinated) proteins. C2-like domains are thought to
be involved in phospholipid binding in a Ca2+
independent manner in both Unc13 and Munc13.
Caenorabditis elegans Unc13 has a central domain with
sequence similarity to PKC, which includes C1 and
C2-related domains. Unc13 binds phorbol esters and DAG
with high affinity in a phospholipid manner. Mutations
in Unc13 results in abnormal neuronal connections and
impairment in cholinergic neurotransmission in the
nematode. Munc13 is the mammalian homolog which are
expressed in the brain. There are 3 isoforms (Munc13-1,
-2, -3) and are thought to play a role in
neurotransmitter release and are hypothesized to be
high-affinity receptors for phorbol esters. Unc13 and
Munc13 contain both C1 and C2 domains. There are two C2
related domains present, one central and one at the
carboxyl end. Munc13-1 contains a third C2-like domain.
Munc13 interacts with syntaxin, synaptobrevin, and
synaptotagmin suggesting a role for these as scaffolding
proteins. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 127
Score = 37.9 bits (88), Expect = 8e-04
Identities = 27/96 (28%), Positives = 44/96 (45%), Gaps = 18/96 (18%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKI 159
+ + ++ LI D G SDP Y+ + K K +T + LNP++NE+F E
Sbjct: 3 ISITVVCAQGLIAKDKTGTSDP----YVTVQVGKTKKRTKTIPQNLNPVWNEKFHFE--- 55
Query: 160 TELSKQTLVITVWDKDYG-----------KSNDYLG 184
S + + VWD+D +S+D+LG
Sbjct: 56 CHNSSDRIKVRVWDEDDDIKSRLKQKFTRESDDFLG 91
>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 = 37.4 bits (87), Expect = 0.001
Identities = 28/111 (25%), Positives = 53/111 (47%), Gaps = 9/111 (8%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLH-KRKYKTGVKWK 143
G++ L++ R L +++++ L +S + ++K+ L PD + + KT
Sbjct: 1 GQLKLSIEGQN--RKLTLHVLEAKGLRSTNSGT-CNSYVKISLSPDKEVRFRQKTSTVPD 57
Query: 144 TLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGCLELCCNSKG 194
+ NP+F+E F+ + + K+ LV TVW+ K + L C S G
Sbjct: 58 SANPLFHETFSFDVNERDYQKRLLV-TVWN----KLSKSRDSGLLGCMSFG 103
>gnl|CDD|176024 cd08378, C2B_MCTP_PRT_plant, C2 domain second repeat found in
Multiple C2 domain and Transmembrane region Proteins
(MCTP); plant subset. MCTPs are involved in Ca2+
signaling at the membrane. Plant-MCTPs are composed of
a variable N-terminal sequence, four C2 domains, two
transmembrane regions (TMRs), and a short C-terminal
sequence. It is one of four protein classes that are
anchored to membranes via a transmembrane region; the
others being synaptotagmins, extended synaptotagmins,
and ferlins. MCTPs are the only membrane-bound C2 domain
proteins that contain two functional TMRs. MCTPs are
unique in that they bind Ca2+ but not phospholipids. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 121
Score = 36.9 bits (86), Expect = 0.002
Identities = 27/87 (31%), Positives = 41/87 (47%), Gaps = 11/87 (12%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKI 159
L V ++K L +DP +++ L K T +T NP +N+ FA
Sbjct: 2 LYVRVVKARGL----PANSNDPVVEVKLGN----YKGSTKAIERTSNPEWNQVFAFSK-- 51
Query: 160 TELSKQTLVITVWDKDYGKSNDYLGCL 186
L TL ++VWDKD K +D+LG +
Sbjct: 52 DRLQGSTLEVSVWDKDKAK-DDFLGGV 77
Score = 27.3 bits (61), Expect = 3.0
Identities = 19/49 (38%), Positives = 26/49 (53%), Gaps = 3/49 (6%)
Query: 1 RTINPEFHEKLTFYSVSETDLSLQSLHILVLDDDKYGHDFLGEARFPLN 49
RT NPE+++ F S+ L +L + V D DK DFLG F L+
Sbjct: 37 RTSNPEWNQVFAF---SKDRLQGSTLEVSVWDKDKAKDDFLGGVCFDLS 82
>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 = 36.6 bits (85), Expect = 0.003
Identities = 29/99 (29%), Positives = 43/99 (43%), Gaps = 16/99 (16%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLK-PDLHKRKYKTGVKWKTLNPIFNEEFA---- 154
L V +I+C++L NG DP+ + L + + +T VK KT NP F+E F
Sbjct: 2 LSVRVIECSDLAL--KNGTCDPYASVTLIYSNKKQDTKRTKVKKKTNNPQFDEAFYFDVT 59
Query: 155 ----IETKITE-----LSKQTLVITVWDKDYGKSNDYLG 184
E K E K L + +W G + +LG
Sbjct: 60 IDSSPEKKQFEMPEEDAEKLELRVDLWHASMGGGDVFLG 98
Score = 26.6 bits (59), Expect = 8.4
Identities = 19/65 (29%), Positives = 25/65 (38%), Gaps = 13/65 (20%)
Query: 1 RTINPEFHEKLTF------------YSVSETDLSLQSLHILVLDDDKYGHD-FLGEARFP 47
+T NP+F E F + + E D L + + G D FLGE R P
Sbjct: 44 KTNNPQFDEAFYFDVTIDSSPEKKQFEMPEEDAEKLELRVDLWHASMGGGDVFLGEVRIP 103
Query: 48 LNRLR 52
L L
Sbjct: 104 LRGLD 108
>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 = 35.7 bits (83), Expect = 0.004
Identities = 21/69 (30%), Positives = 33/69 (47%), Gaps = 2/69 (2%)
Query: 85 GKIFLTLCFSTKKRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKT 144
G + + + R L V +I+ ++ D G S + L L P +R KT V+ +
Sbjct: 3 GDLDVAFEYDPSARKLTVTVIRAQDIPTKDRGGASSWQVHLVLLPSKKQR-AKTKVQ-RG 60
Query: 145 LNPIFNEEF 153
NP+FNE F
Sbjct: 61 PNPVFNETF 69
>gnl|CDD|176018 cd04054, C2A_Rasal1_RasA4, C2 domain first repeat present in RasA1
and RasA4. Rasal1 and RasA4 are both members of GAP1
(GTPase activating protein 1). Rasal1 responds to
repetitive Ca2+ signals by associating with the plasma
membrane and deactivating Ras. RasA4 suppresses Ras
function by enhancing the GTPase activity of Ras
proteins resulting in the inactive GDP-bound form of
Ras. In this way it can control cellular proliferation
and differentiation. Both of these proteins contains
two C2 domains, a Ras-GAP domain, a plextrin homology
(PH)-like domain, and a Bruton's Tyrosine Kinase (BTK)
zinc binding domain. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-I topology.
Length = 121
Score = 35.2 bits (81), Expect = 0.006
Identities = 24/86 (27%), Positives = 41/86 (47%), Gaps = 6/86 (6%)
Query: 99 ALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETK 158
+L + +++ NL D G SDP+ + + ++ R T WKTLNP + EE+ +
Sbjct: 1 SLYIRIVEGKNLPAKDITGSSDPYCIVKVDNEVIIR---TATVWKTLNPFWGEEYTVHLP 57
Query: 159 ITELSKQTLVITVWDKDYGKSNDYLG 184
T+ V D+D +D +G
Sbjct: 58 ---PGFHTVSFYVLDEDTLSRDDVIG 80
>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 = 34.9 bits (81), Expect = 0.008
Identities = 19/76 (25%), Positives = 31/76 (40%), Gaps = 7/76 (9%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKI 159
L + +++ NL G DP+ + L +T K LNP + EEF +
Sbjct: 2 LRLRILEAKNLPS---KGTRDPYCTVSLD---QVEVARTKTVEK-LNPFWGEEFVFDDPP 54
Query: 160 TELSKQTLVITVWDKD 175
+++ TL DK
Sbjct: 55 PDVTFFTLSFYNKDKR 70
>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 = 34.3 bits (79), Expect = 0.014
Identities = 25/87 (28%), Positives = 43/87 (49%), Gaps = 11/87 (12%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKI 159
L+V IK L ++ G S+P+ L + D +KY++ + T NP ++E F +
Sbjct: 1 LLVKNIKANGL--SEAAGSSNPYCVLEM--DEPPQKYQSSTQKNTSNPFWDEHF-----L 51
Query: 160 TELSKQT--LVITVWDKDYGKSNDYLG 184
ELS + L+ V+D + +LG
Sbjct: 52 FELSPNSKELLFEVYDNGKKSDSKFLG 78
>gnl|CDD|176010 cd04045, C2C_Tricalbin-like, C2 domain third repeat present in
Tricalbin-like proteins. 5 to 6 copies of the C2 domain
are present in Tricalbin, a yeast homolog of
Synaptotagmin, which is involved in membrane trafficking
and sorting. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the third C2
repeat, C2C, and has a type-II topology.
Length = 120
Score = 33.3 bits (77), Expect = 0.025
Identities = 13/54 (24%), Positives = 29/54 (53%), Gaps = 5/54 (9%)
Query: 99 ALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKR-KYKTGVKWKTLNPIFNE 151
L +++ K +L ++ G DP++++ + + K +T TLNP+++E
Sbjct: 2 VLRLHIRKANDLKNLEGVGKIDPYVRVLV----NGIVKGRTVTISNTLNPVWDE 51
>gnl|CDD|176064 cd08682, C2_Rab11-FIP_classI, C2 domain found in Rab11-family
interacting proteins (FIP) class I. Rab GTPases recruit
various effector proteins to organelles and vesicles.
Rab11-family interacting proteins (FIPs) are involved in
mediating the role of Rab11. FIPs can be divided into
three classes: class I FIPs (Rip11a, Rip11b, RCP, and
FIP2) which contain a C2 domain after N-terminus of the
protein, class II FIPs (FIP3 and FIP4) which contain two
EF-hands and a proline rich region, and class III FIPs
(FIP1) which exhibits no homology to known protein
domains. All FIP proteins contain a highly conserved,
20-amino acid motif at the C-terminus of the protein,
known as Rab11/25 binding domain (RBD). Class I FIPs
are thought to bind to endocytic membranes via their C2
domain, which interacts directly with phospholipids.
Class II FIPs do not have any membrane binding domains
leaving much to speculate about the mechanism involving
FIP3 and FIP4 interactions with endocytic membranes. The
members in this CD are class I FIPs. The exact function
of the Rab11 and FIP interaction is unknown, but there
is speculation that it involves the role of forming a
targeting complex that recruits a group of proteins
involved in membrane transport to organelles. The C2
domain was first identified in PKC. C2 domains fold into
an 8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 126
Score = 33.2 bits (76), Expect = 0.033
Identities = 28/106 (26%), Positives = 51/106 (48%), Gaps = 11/106 (10%)
Query: 102 VNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEE--FAIETKI 159
V +++ L+ +G +D ++ + L K KY T VK KT +P++ EE F + +
Sbjct: 3 VTVLQARGLLCKGKSGTNDAYVII----QLGKEKYSTSVKEKTTSPVWKEECSFELPGLL 58
Query: 160 TELSKQ-TLVITVWDKDYGKSNDYLGCLELCCNS----KGDRLRHW 200
+ + TL +TV ++ + +LG + + N KG R W
Sbjct: 59 SGNGNRATLQLTVMHRNLLGLDKFLGQVSIPLNDLDEDKGRRRTRW 104
>gnl|CDD|176017 cd04052, C2B_Tricalbin-like, C2 domain second repeat present in
Tricalbin-like proteins. 5 to 6 copies of the C2 domain
are present in Tricalbin, a yeast homolog of
Synaptotagmin, which is involved in membrane trafficking
and sorting. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 111
Score = 33.0 bits (76), Expect = 0.036
Identities = 20/58 (34%), Positives = 28/58 (48%), Gaps = 5/58 (8%)
Query: 117 GFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKITELSKQTLVITVWDK 174
G P+ +LYL L Y T VK KT NP +N + E +T+ K + + V D
Sbjct: 11 GLLSPYAELYLNGKL---VYTTRVKKKTNNPSWNA--STEFLVTDRRKSRVTVVVKDD 63
>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 = 33.4 bits (77), Expect = 0.042
Identities = 17/71 (23%), Positives = 32/71 (45%), Gaps = 5/71 (7%)
Query: 114 DSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKITELSKQTLVITVWD 173
+ DP++++ +K KT VK + NP +NE+ L + + I + D
Sbjct: 30 EKKELVDPYVEV----SFAGQKVKTSVKKNSYNPEWNEQIVFPEMFPPLC-ERIKIQIRD 84
Query: 174 KDYGKSNDYLG 184
D ++D +G
Sbjct: 85 WDRVGNDDVIG 95
>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 = 32.6 bits (75), Expect = 0.047
Identities = 15/59 (25%), Positives = 25/59 (42%), Gaps = 5/59 (8%)
Query: 146 NPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLGC----LELCCNSKGDRLRHW 200
P+FNE F + T+L ++TL + V + + LG L +S + W
Sbjct: 64 KPVFNEVFRVPISSTKLYQKTLQVDVCSVGPDQQEECLGGAQISLADFESS-EEMSTKW 121
>gnl|CDD|176011 cd04046, C2_Calpain, C2 domain present in Calpain proteins. A
single C2 domain is found in calpains (EC 3.4.22.52, EC
3.4.22.53), calcium-dependent, non-lysosomal cysteine
proteases. Caplains are classified as belonging to Clan
CA by MEROPS and include six families: C1, C2, C10, C12,
C28, and C47. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 126
Score = 32.6 bits (75), Expect = 0.048
Identities = 16/79 (20%), Positives = 34/79 (43%), Gaps = 7/79 (8%)
Query: 97 KRALIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIE 156
+ V++ L DS G +DP++ + + ++ V+ TL+P F+ +
Sbjct: 2 QVVTQVHVHSAEGLSKQDSGGGADPYVIIKCE----GESVRSPVQKDTLSPEFDTQAIFY 57
Query: 157 TKITELSKQTLVITVWDKD 175
K + + I VW+ +
Sbjct: 58 RK---KPRSPIKIQVWNSN 73
>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 = 32.3 bits (74), Expect = 0.066
Identities = 21/68 (30%), Positives = 33/68 (48%), Gaps = 9/68 (13%)
Query: 120 DPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKITELSKQTLVITVWD-KDYGK 178
DPF + + + + T V KTL+P +NE F +T + I V+D K + K
Sbjct: 22 DPFAVITVDGG---QTHSTDVAKKTLDPKWNEHF----DLTVGPSSIITIQVFDQKKFKK 74
Query: 179 SND-YLGC 185
+ +LGC
Sbjct: 75 KDQGFLGC 82
>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 = 31.5 bits (72), Expect = 0.15
Identities = 14/52 (26%), Positives = 25/52 (48%), Gaps = 3/52 (5%)
Query: 102 VNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEF 153
V +I+ +L+P D N + F+K L + + + + NP +NEE
Sbjct: 4 VTVIEAQDLVPSDKNRVPEVFVKAQLGNQVLRTRPSQT---RNGNPSWNEEL 52
>gnl|CDD|175981 cd04014, C2_PKC_epsilon, C2 domain in Protein Kinase C (PKC)
epsilon. A single C2 domain is found in PKC epsilon.
The PKC family of serine/threonine kinases regulates
apoptosis, proliferation, migration, motility,
chemo-resistance, and differentiation. There are 3
groups: group 1 (alpha, betaI, beta II, gamma) which
require phospholipids and calcium, group 2 (delta,
epsilon, theta, eta) which do not require calcium for
activation, and group 3 (xi, iota/lambda) which are
atypical and can be activated in the absence of
diacylglycerol and calcium. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members here have a type-II
topology.
Length = 132
Score = 31.5 bits (72), Expect = 0.16
Identities = 13/37 (35%), Positives = 20/37 (54%), Gaps = 3/37 (8%)
Query: 120 DPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIE 156
DP++ + + KT K KT +P++NEEF E
Sbjct: 36 DPYVSIDVD---DTHIGKTSTKPKTNSPVWNEEFTTE 69
>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 = 31.1 bits (71), Expect = 0.19
Identities = 19/49 (38%), Positives = 24/49 (48%), Gaps = 4/49 (8%)
Query: 136 YKTGVKWKTLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLG 184
KT V KT NP +NE F + +T S TL VW K++ LG
Sbjct: 36 KKTEVSKKTSNPKWNEHFTV--LVTPQS--TLEFKVWSHHTLKADVLLG 80
>gnl|CDD|176068 cd08686, C2_ABR, C2 domain in the Active BCR (Breakpoint cluster
region) Related protein. The ABR protein is similar to
the breakpoint cluster region protein. It has homology
to guanine nucleotide exchange proteins and
GTPase-activating proteins (GAPs). ABR is expressed
primarily in the brain, but also includes non-neuronal
tissues such as the heart. It has been associated with
human diseases such as Miller-Dieker syndrome in which
mental retardation and malformations of the heart are
present. ABR contains a RhoGEF domain and a PH-like
domain upstream of its C2 domain and a RhoGAP domain
downstream of this domain. A few members also contain a
Bcr-Abl oncoprotein oligomerization domain at the very
N-terminal end. Splice variants of ABR have been
identified. ABR is found in a wide variety of organisms
including chimpanzee, dog, mouse, rat, fruit fly, and
mosquito. The C2 domain was first identified in PKC. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 118
Score = 30.6 bits (69), Expect = 0.23
Identities = 19/45 (42%), Positives = 23/45 (51%), Gaps = 4/45 (8%)
Query: 135 KYKTGVKWKTLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKS 179
K KT V T P +NEEF IE + QTL I ++K Y K
Sbjct: 32 KAKTRVCRDTTEPNWNEEFEIELE----GSQTLRILCYEKCYSKV 72
>gnl|CDD|176041 cd08395, C2C_Munc13, C2 domain third repeat in Munc13 (mammalian
uncoordinated) proteins. C2-like domains are thought to
be involved in phospholipid binding in a Ca2+
independent manner in both Unc13 and Munc13.
Caenorabditis elegans Unc13 has a central domain with
sequence similarity to PKC, which includes C1 and
C2-related domains. Unc13 binds phorbol esters and DAG
with high affinity in a phospholipid manner. Mutations
in Unc13 results in abnormal neuronal connections and
impairment in cholinergic neurotransmission in the
nematode. Munc13 is the mammalian homolog which are
expressed in the brain. There are 3 isoforms (Munc13-1,
-2, -3) and are thought to play a role in
neurotransmitter release and are hypothesized to be
high-affinity receptors for phorbol esters. Unc13 and
Munc13 contain both C1 and C2 domains. There are two C2
related domains present, one central and one at the
carboxyl end. Munc13-1 contains a third C2-like domain.
Munc13 interacts with syntaxin, synaptobrevin, and
synaptotagmin suggesting a role for these as scaffolding
proteins.C2 domains fold into an 8-standed beta-sandwich
that can adopt 2 structural arrangements: Type I and
Type II, distinguished by a circular permutation
involving their N- and C-terminal beta strands. Many C2
domains are Ca2+-dependent membrane-targeting modules
that bind a wide variety of substances including bind
phospholipids, inositol polyphosphates, and
intracellular proteins. Most C2 domain proteins are
either signal transduction enzymes that contain a single
C2 domain, such as protein kinase C, or membrane
trafficking proteins which contain at least two C2
domains, such as synaptotagmin 1. However, there are a
few exceptions to this including RIM isoforms and some
splice variants of piccolo/aczonin and intersectin which
only have a single C2 domain. C2 domains with a calcium
binding region have negatively charged residues,
primarily aspartates, that serve as ligands for calcium
ions. This cd contains the third C2 repeat, C2C, and
has a type-II topology.
Length = 120
Score = 30.4 bits (69), Expect = 0.33
Identities = 17/55 (30%), Positives = 27/55 (49%), Gaps = 4/55 (7%)
Query: 102 VNLIKCTNLIPMDSNGFSDPFIKLYL-KPDLH--KRKYKTGVKWKTLNPIFNEEF 153
V ++ +L + F PF+++ L P L KRK+ T K +P +NE F
Sbjct: 4 VKVVAANDLKWQTTGMFR-PFVEVNLIGPHLSDKKRKFATKSKNNNWSPKYNETF 57
>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 = 30.3 bits (69), Expect = 0.35
Identities = 26/91 (28%), Positives = 37/91 (40%), Gaps = 17/91 (18%)
Query: 100 LIVNLIKCTNLIPMDSNGFSDPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNE--EFAIET 157
L+V+L L G D K+ + K KT V LNP++NE E+ +
Sbjct: 1 LVVSLKNLPGL-----KGKGDRIAKVTFRGV----KKKTRVLENELNPVWNETFEWPLAG 51
Query: 158 KITELSKQTLVITVWDKDYGK--SNDYLGCL 186
++L I V KDY K N +G
Sbjct: 52 SP--DPDESLEIVV--KDYEKVGRNRLIGSA 78
>gnl|CDD|226861 COG4454, COG4454, Uncharacterized copper-binding protein [Inorganic
ion transport and metabolism].
Length = 158
Score = 30.5 bits (69), Expect = 0.38
Identities = 6/25 (24%), Positives = 13/25 (52%)
Query: 197 LRHWVDMMKYPDHKHEGIHNLSIKP 221
L H M+ D +H+ + +++ P
Sbjct: 96 LEHVTHMILADDMEHDDPNTVTLAP 120
>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 = 29.5 bits (67), Expect = 0.56
Identities = 16/53 (30%), Positives = 26/53 (49%), Gaps = 2/53 (3%)
Query: 134 RKYKTGVKWKTLNPIFNEEFAIETKIT--ELSKQTLVITVWDKDYGKSNDYLG 184
+K T VK T P +NE F + EL + + I+V+D +S+ +G
Sbjct: 32 QKKYTSVKKGTNCPFYNEYFFFNFHESPDELFDKIIKISVYDSRSLRSDTLIG 84
>gnl|CDD|175998 cd04032, C2_Perforin, C2 domain of Perforin. Perforin contains a
single copy of a C2 domain in its C-terminus and plays a
role in lymphocyte-mediated cytotoxicity. Mutations in
perforin leads to familial hemophagocytic
lymphohistiocytosis type 2. The function of perforin is
calcium dependent and the C2 domain is thought to confer
this binding to target cell membranes. C2 domains fold
into an 8-standed beta-sandwich that can adopt 2
structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 127
Score = 29.2 bits (66), Expect = 0.92
Identities = 19/48 (39%), Positives = 23/48 (47%), Gaps = 3/48 (6%)
Query: 138 TGVKWKTLNPIFNEEFAIETKITELSK-QTLVITVWDKDYGKSNDYLG 184
T V W NP +N F + ELS L VWD+D G +D LG
Sbjct: 63 TEVIWNNNNPRWNATFDFGS--VELSPGGKLRFEVWDRDNGWDDDLLG 108
>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 = 28.9 bits (65), Expect = 1.1
Identities = 13/49 (26%), Positives = 24/49 (48%), Gaps = 3/49 (6%)
Query: 136 YKTGVKWKTLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLG 184
++T K+L P F E+F E T + L ++D+D + + +G
Sbjct: 36 FRTKTVEKSLCPFFGEDFYFEIPRT---FRHLSFYIYDRDVLRRDSVIG 81
>gnl|CDD|223311 COG0233, Frr, Ribosome recycling factor [Translation, ribosomal
structure and biogenesis].
Length = 187
Score = 29.1 bits (66), Expect = 1.4
Identities = 11/36 (30%), Positives = 18/36 (50%), Gaps = 6/36 (16%)
Query: 145 LNPIFNEEFAIETKITELS------KQTLVITVWDK 174
L+ I E + T + +L+ +TLVI +DK
Sbjct: 39 LDRITVEYYGSPTPLNQLASISVPEARTLVIKPFDK 74
>gnl|CDD|176015 cd04050, C2B_Synaptotagmin-like, C2 domain second repeat present in
Synaptotagmin-like proteins. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Previously all synaptotagmins
were thought to be calcium sensors in the regulation of
neurotransmitter release and hormone secretion, but it
has been shown that not all of them bind calcium. Of
the 17 identified synaptotagmins only 8 bind calcium
(1-3, 5-7, 9, 10). The function of the two C2 domains
that bind calcium are: regulating the fusion step of
synaptic vesicle exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 105
Score = 27.9 bits (63), Expect = 1.5
Identities = 19/60 (31%), Positives = 28/60 (46%), Gaps = 6/60 (10%)
Query: 120 DPFIKLYLKPDLHKRKYKTGVKWKTLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKS 179
P+++L + K K+ VK +T NP++ E F + Q L I V D GKS
Sbjct: 22 SPYVELTVG----KTTQKSKVKERTNNPVWEEGFTF--LVRNPENQELEIEVKDDKTGKS 75
>gnl|CDD|215193 PLN02337, PLN02337, lipoxygenase.
Length = 866
Score = 29.3 bits (66), Expect = 1.7
Identities = 15/32 (46%), Positives = 20/32 (62%), Gaps = 4/32 (12%)
Query: 17 SETDLSLQSLHILVLDDDKYGH----DFLGEA 44
SE+ L L SL+I V D+++GH DFL A
Sbjct: 247 SESRLPLLSLNIYVPRDERFGHLKMSDFLAYA 278
>gnl|CDD|239789 cd04256, AAK_P5CS_ProBA, AAK_P5CS_ProBA: Glutamate-5-kinase (G5K)
domain of the bifunctional delta
1-pyrroline-5-carboxylate synthetase (P5CS), composed of
an N-terminal G5K (ProB) and a C-terminal glutamyl 5-
phosphate reductase (G5PR, ProA), the first and second
enzyme catalyzing proline (and, in mammals, ornithine)
biosynthesis. G5K transfers the terminal phosphoryl
group of ATP to the gamma-carboxyl group of glutamate,
and is subject to feedback allosteric inhibition by
proline or ornithine. In plants, proline plays an
important role as an osmoprotectant and, in mammals,
ornithine biosynthesis is crucial for proper ammonia
detoxification, since a G5K mutation has been shown to
cause human hyperammonaemia.
Length = 284
Score = 28.6 bits (64), Expect = 2.3
Identities = 16/62 (25%), Positives = 21/62 (33%), Gaps = 15/62 (24%)
Query: 125 LYLKPDLH---KRKYKTGVKWKTLN--------PIFNEEFAIETKITELSKQTLVITVWD 173
L KPD + R+ G TL PI N A+ VI++ D
Sbjct: 124 LVTKPDFYDEQTRRNLNG----TLEELLRLNIIPIINTNDAVSPPPEPDEDLQGVISIKD 179
Query: 174 KD 175
D
Sbjct: 180 ND 181
>gnl|CDD|177875 PLN02230, PLN02230, phosphoinositide phospholipase C 4.
Length = 598
Score = 28.9 bits (64), Expect = 2.5
Identities = 17/52 (32%), Positives = 29/52 (55%), Gaps = 4/52 (7%)
Query: 137 KTGVKWKTLNPIFNEEFAIETKITELSKQTLVITVWDKDYGKSNDYLG--CL 186
KT +++ T PI+N+EF + EL+ L + V + D + +D+ G CL
Sbjct: 515 KTKIEYDTWTPIWNKEFIFPLAVPELA--LLRVEVHEHDINEKDDFGGQTCL 564
>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 = 27.7 bits (62), Expect = 2.9
Identities = 13/57 (22%), Positives = 26/57 (45%), Gaps = 7/57 (12%)
Query: 135 KYKTGVKWKTL------NPIFNEEFAIETKITELSKQT-LVITVWDKDYGKSNDYLG 184
+ +T + + NP +NE+F + T L++ + DKD +D++G
Sbjct: 29 QCRTQERKSKVAKGDGRNPEWNEKFKFTVEYPGWGGDTKLILRIMDKDNFSDDDFIG 85
>gnl|CDD|178538 PLN02952, PLN02952, phosphoinositide phospholipase C.
Length = 599
Score = 28.8 bits (64), Expect = 3.0
Identities = 26/82 (31%), Positives = 36/82 (43%), Gaps = 15/82 (18%)
Query: 118 FSDPFIKLYLKPDLHKRKYKTGV-----KWKT------LNPIFNEEFAIETKITELSKQT 166
FS Y PD + + Y GV K KT P +NEEF+ + EL+
Sbjct: 486 FSHTHFDSYSPPDFYTKMYIVGVPADNAKKKTKIIEDNWYPAWNEEFSFPLTVPELA--L 543
Query: 167 LVITVWDKDYGKSNDYLG--CL 186
L I V + D + +D+ G CL
Sbjct: 544 LRIEVREYDMSEKDDFGGQTCL 565
>gnl|CDD|215567 PLN03087, PLN03087, BODYGUARD 1 domain containing hydrolase;
Provisional.
Length = 481
Score = 27.9 bits (62), Expect = 5.1
Identities = 8/14 (57%), Positives = 12/14 (85%)
Query: 54 HISRDLCLNLCKHY 67
HISR +CL +CK++
Sbjct: 347 HISRTICLVICKNH 360
>gnl|CDD|109180 pfam00113, Enolase_C, Enolase, C-terminal TIM barrel domain.
Length = 296
Score = 27.8 bits (62), Expect = 5.2
Identities = 18/58 (31%), Positives = 22/58 (37%), Gaps = 8/58 (13%)
Query: 32 DDDKYGHDFLGEARFPLNRLRPHISRDLCLNLCKHYPV-----PREEEVWGEEECWQH 84
D KY DF P L DL L K YP+ P +E+ W E W+
Sbjct: 114 KDGKYDLDFKNPKSDPSKWLTSDQLADLYKELIKKYPIVSIEDPFDEDDW---EAWKK 168
>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 = 26.7 bits (60), Expect = 5.5
Identities = 23/81 (28%), Positives = 34/81 (41%), Gaps = 14/81 (17%)
Query: 99 ALIVNLIKCTNLIPMDS-NGFSDPFIKLYL-KPDLHKRKYKTGVKWKTLNPIFNEEFAIE 156
L V + L D G DP++ + R T VK T NP++N E
Sbjct: 3 VLAVTIKSARGLKGSDIIGGTVDPYVTFSISNRRELAR---TKVKKDTSNPVWN-----E 54
Query: 157 TK---ITELSKQTLVITVWDK 174
TK + L+ + L +TV+D
Sbjct: 55 TKYILVNSLT-EPLNLTVYDF 74
>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 = 26.8 bits (60), Expect = 5.6
Identities = 17/56 (30%), Positives = 27/56 (48%), Gaps = 13/56 (23%)
Query: 3 INPEFHEKLTFYSVSETDLSLQS-----LHILVLDDDKYGHDFLGEARFPLNRLRP 53
INP ++E TF +QS L + V+D+D D LG F +++L+
Sbjct: 46 INPVWNE--TFE------FRIQSQVKNVLELTVMDEDYVMDDHLGTVLFDVSKLKL 93
>gnl|CDD|212130 cd11665, LamB_like, Aspergillus nidulans lactam utilization protein
LamB and similar proteins. This eukaryotic and
bacterial subfamily of the LamB/YbgL family, includes
Aspergillus nidulans protein LamB. The lamb gene locates
at the lam locus of Aspergillus nidulans, consisting of
two divergently transcribed genes, lamA and lamB, needed
for the utilization of lactams such as 2-pyrrolidinone.
Both genes are under the control of the positive
regulatory gene amdR and are subject to carbon and
nitrogen metabolite repression. Although the exact
molecular function of lamb encoding protein LamB is
unknown, it might be required for conversion of
exogenous 2-pyrrolidinone to endogenous GABA.
Length = 238
Score = 26.9 bits (60), Expect = 8.2
Identities = 15/58 (25%), Positives = 21/58 (36%), Gaps = 18/58 (31%)
Query: 40 FLGEARFPLNRLRPH------ISRDLCLNL-----CKHYPVP-------REEEVWGEE 79
FL PLN ++PH +RD + K + VP E+V E
Sbjct: 95 FLDAEGVPLNHIKPHGALYGMAARDEEVARAVADAAKVFGVPVFGLPGTLHEKVAKEL 152
Database: CDD.v3.10
Posted date: Mar 20, 2013 7:55 AM
Number of letters in database: 10,937,602
Number of sequences in database: 44,354
Lambda K H
0.322 0.140 0.448
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: 11,432,545
Number of extensions: 1055303
Number of successful extensions: 909
Number of sequences better than 10.0: 1
Number of HSP's gapped: 824
Number of HSP's successfully gapped: 132
Length of query: 224
Length of database: 10,937,602
Length adjustment: 93
Effective length of query: 131
Effective length of database: 6,812,680
Effective search space: 892461080
Effective search space used: 892461080
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.4 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.9 bits)
S2: 57 (25.9 bits)