RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy12095
(128 letters)
>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 = 225 bits (577), Expect = 4e-78
Identities = 87/118 (73%), Positives = 101/118 (85%), Gaps = 1/118 (0%)
Query: 2 KLEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFN 61
L+YDF +N L+V +IQA DLPA+DMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFN
Sbjct: 8 SLDYDFQSNQLTVGIIQAADLPAMDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFN 67
Query: 62 ETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQS 119
ETF FK VPY++ NKTLVF+++DFDRFSKHD IGEV+V L +DL EEWR+L+S
Sbjct: 68 ETFTFK-VPYSELGNKTLVFSVYDFDRFSKHDLIGEVRVPLLTVDLGHVTEEWRDLES 124
>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 = 160 bits (406), Expect = 4e-52
Identities = 57/116 (49%), Positives = 83/116 (71%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNE 62
+ YDF ++L++ +++A +LPA D GTSDP+VK+YLLPDKK K ETKV RK LNP +NE
Sbjct: 9 VSYDFQESTLTLKILKAVELPAKDFSGTSDPFVKIYLLPDKKHKLETKVKRKNLNPHWNE 68
Query: 63 TFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQ 118
TF+F+G PY + L + D+DRFS++D IGEV + L ++DL + W++L+
Sbjct: 69 TFLFEGFPYEKLQQRVLYLQVLDYDRFSRNDPIGEVSLPLNKVDLTEEQTFWKDLK 124
>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 = 125 bits (315), Expect = 3e-38
Identities = 53/119 (44%), Positives = 82/119 (68%), Gaps = 1/119 (0%)
Query: 1 MKLEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVF 60
LEYD + L+V +IQA +L D GT+DPY KV LLPD+ ++K+H+KTLNP F
Sbjct: 7 FSLEYDKDMGILNVKLIQARNLQPRDFSGTADPYCKVRLLPDRSNTKQSKIHKKTLNPEF 66
Query: 61 NETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQS 119
+E+FVF VP + +TL ++DFD+FS+ + IG V++ L ++DL++ ++ WR++QS
Sbjct: 67 DESFVF-EVPPQELPKRTLEVLLYDFDQFSRDECIGVVELPLAEVDLSEKLDLWRKIQS 124
>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 = 125 bits (315), Expect = 3e-38
Identities = 56/121 (46%), Positives = 76/121 (62%), Gaps = 3/121 (2%)
Query: 2 KLEYDFNANSLSVTVIQAEDLPALD-MGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVF 60
L Y+ +L V +I+ DLPA+D GTSDPYVK+ LLP+K+ K +T+V RKT NPV+
Sbjct: 8 SLRYNSEKKALLVNIIECRDLPAMDEQSGTSDPYVKLQLLPEKEHKVKTRVLRKTRNPVY 67
Query: 61 NETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQ--TIEEWRELQ 118
+ETF F G+PY + +L FA+ FDR+S+ D IGEV L DL + RE+Q
Sbjct: 68 DETFTFYGIPYNQLQDLSLHFAVLSFDRYSRDDVIGEVVCPLAGADLLNEGELLVSREIQ 127
Query: 119 S 119
Sbjct: 128 P 128
>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 = 123 bits (311), Expect = 1e-37
Identities = 48/117 (41%), Positives = 74/117 (63%), Gaps = 2/117 (1%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMG-GTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFN 61
++YD L+V++I+A +LP DP+VKV LLPD+++ ++KV RKT NP F+
Sbjct: 7 VQYDLEEEQLTVSLIKARNLPPRTKDVAHCDPFVKVCLLPDERRSLQSKVKRKTQNPNFD 66
Query: 62 ETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQ 118
ETFVF+ V + + +TL +++D DRFS+H IG V L +DL + WR+L+
Sbjct: 67 ETFVFQ-VSFKELQRRTLRLSVYDVDRFSRHCIIGHVLFPLKDLDLVKGGVVWRDLE 122
>gnl|CDD|215765 pfam00168, C2, C2 domain.
Length = 85
Score = 110 bits (278), Expect = 4e-33
Identities = 45/88 (51%), Positives = 55/88 (62%), Gaps = 3/88 (3%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY 71
L VTVI A++LP D+ G SDPYVKV L KK +TKV + TLNPV+NETF F+
Sbjct: 1 LRVTVISAKNLPPKDLNGKSDPYVKVSLGGQKKDTKKTKVVKNTLNPVWNETFTFEVTLP 60
Query: 72 ADAMNKTLVFAIFDFDRFSKHDQIGEVK 99
A L ++D+DRF K D IGEV
Sbjct: 61 ELA---ELRIEVYDYDRFGKDDFIGEVT 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 = 111 bits (278), Expect = 7e-33
Identities = 54/107 (50%), Positives = 70/107 (65%), Gaps = 6/107 (5%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY 71
L VTVI+A +LPA D+ G SDPYVKV L K+KF+TKV + TLNPV+NETF F P
Sbjct: 1 LRVTVIEARNLPAKDLNGKSDPYVKVSL--GGKQKFKTKVVKNTLNPVWNETFEF---PV 55
Query: 72 ADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQI-DLAQTIEEWREL 117
D + TL ++D DRFSK D +GEV++ L ++ D + E W L
Sbjct: 56 LDPESDTLTVEVWDKDRFSKDDFLGEVEIPLSELLDSGKEGELWLPL 102
>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 = 110 bits (277), Expect = 8e-33
Identities = 47/104 (45%), Positives = 63/104 (60%), Gaps = 3/104 (2%)
Query: 11 SLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVP 70
+L+V +I A +LP D GG SDPYVKV L D K+K +TKV + TLNPV+NETF F+ P
Sbjct: 1 TLTVKIISARNLPPKDKGGKSDPYVKVSLDGDPKEKKKTKVVKNTLNPVWNETFEFEVPP 60
Query: 71 YADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEW 114
A L ++D DRF + D IG+V + L + L E+
Sbjct: 61 PELAE---LEIEVYDKDRFGRDDFIGQVTIPLSDLLLGGRHEKL 101
>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 = 108 bits (273), Expect = 7e-32
Identities = 51/124 (41%), Positives = 70/124 (56%), Gaps = 11/124 (8%)
Query: 1 MKLEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKF--ETKVHRKTLNP 58
++L YD + L VTV+QA DLP D G +PYVKVYLLPD+ +K TK +KTLNP
Sbjct: 7 IQLWYDKVTSQLIVTVLQARDLPPRDDGSLRNPYVKVYLLPDRSEKSKRRTKTVKKTLNP 66
Query: 59 VFNETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTI----EEW 114
+N+TF + V +TL ++D+DR ++D +GE IDLA + W
Sbjct: 67 EWNQTFEYSNVRRETLKERTLEVTVWDYDRDGENDFLGE-----VVIDLADALLDDEPHW 121
Query: 115 RELQ 118
LQ
Sbjct: 122 YPLQ 125
>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 = 105 bits (265), Expect = 1e-30
Identities = 47/110 (42%), Positives = 63/110 (57%), Gaps = 3/110 (2%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLP--DKKKKFETKVHRKTLNPVF 60
L YD ++L T+I+A+ L A+D G SDPYVK+ LLP K K TK KT NP F
Sbjct: 8 LLYDPANSALHCTIIRAKGLKAMDANGLSDPYVKLNLLPGASKATKLRTKTVHKTRNPEF 67
Query: 61 NETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQT 110
NET + G+ D KTL + D DRF +D +GE ++ L ++ QT
Sbjct: 68 NETLTYYGITEEDIQRKTLRLLVLDEDRFG-NDFLGETRIPLKKLKPNQT 116
>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 = 103 bits (258), Expect = 1e-29
Identities = 42/122 (34%), Positives = 64/122 (52%), Gaps = 5/122 (4%)
Query: 1 MKLEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKK--KFETKVHRKTLNP 58
+ + Y L VTV + +LP D DPYV++YLLPDK K + +T V + LNP
Sbjct: 7 LTIRYSSQRQKLIVTVHKCRNLPPCDSSDIPDPYVRLYLLPDKSKSTRRKTSVKKDNLNP 66
Query: 59 VFNETFVFKGVPYADAMNKTLVFAI-FDFDRFSKH-DQIGEVKVALCQIDLAQTIEEWRE 116
VF+ETF F V + +TL A+ S+ +G+V + L +DL++ +W +
Sbjct: 67 VFDETFEFP-VSLEELKRRTLDVAVKNSKSFLSREKKLLGQVLIDLSDLDLSKGFTQWYD 125
Query: 117 LQ 118
L
Sbjct: 126 LT 127
>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 = 102 bits (257), Expect = 3e-29
Identities = 44/98 (44%), Positives = 56/98 (57%), Gaps = 3/98 (3%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKK--KKFETKVHRKTLNPVF 60
L Y A L+V V++A +LP D G SDPYVKV LL K KK +T V + TLNPVF
Sbjct: 7 LSYLPTAERLTVVVLKARNLPPSDGKGLSDPYVKVSLLQGGKKLKKKKTSVKKGTLNPVF 66
Query: 61 NETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEV 98
NE F F VP +LV + D D +++ IG+V
Sbjct: 67 NEAFSFD-VPAEQLEEVSLVITVVDKDSVGRNEVIGQV 103
>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 = 100 bits (252), Expect = 9e-29
Identities = 44/115 (38%), Positives = 64/115 (55%), Gaps = 4/115 (3%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMG-GTSDPYVKVYLLPDKKK--KFETKVHRKTLNPV 59
L Y++ SL V + + +L D S+PYVKVYLLPDK K K +T V + T NPV
Sbjct: 7 LSYNYKTGSLEVHIKECRNLAYADEKKKRSNPYVKVYLLPDKSKQSKRKTSVKKNTTNPV 66
Query: 60 FNETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEW 114
FNET + + + +TL +++ DRF ++ +GEV++ L DL EW
Sbjct: 67 FNETLKYH-ISKSQLETRTLQLSVWHHDRFGRNTFLGEVEIPLDSWDLDSQQSEW 120
>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 = 98.5 bits (246), Expect = 2e-27
Identities = 46/112 (41%), Positives = 65/112 (58%), Gaps = 2/112 (1%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKK--KFETKVHRKTLNPVFNETFVFKGV 69
L V V +A++LPAL GGTSD +VK YLLPDK K K +T V +K++NPV+N TFV+ GV
Sbjct: 29 LHVWVKEAKNLPALKSGGTSDSFVKCYLLPDKSKKSKQKTPVVKKSVNPVWNHTFVYDGV 88
Query: 70 PYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQSVE 121
D L ++D D+ S +D +G V++ L +W + E
Sbjct: 89 SPEDLSQACLELTVWDHDKLSSNDFLGGVRLGLGTGKSYGQAVDWMDSTGEE 140
>gnl|CDD|176050 cd08405, C2B_Synaptotagmin-7, C2 domain second repeat present in
Synaptotagmin 7. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Synaptotagmin 7, a member of
class 2 synaptotagmins, is located in presynaptic plasma
membranes in neurons, dense-core vesicles in endocrine
cells, and lysosomes in fibroblasts. It has been shown
to play a role in regulation of Ca2+-dependent lysosomal
exocytosis in fibroblasts and may also function as a
vesicular Ca2+-sensor. It is distinguished from the
other synaptotagmins by having over 12 splice forms.
Previously all synaptotagmins were thought to be calcium
sensors in the regulation of neurotransmitter release
and hormone secretion, but it has been shown that not
all of them bind calcium. Of the 17 identified
synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10).
The function of the two C2 domains that bind calcium
are: regulating the fusion step of synaptic vesicle
exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-I topology.
Length = 136
Score = 95.9 bits (239), Expect = 1e-26
Identities = 44/98 (44%), Positives = 69/98 (70%), Gaps = 3/98 (3%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLL-PDKK-KKFETKVHRKTLNPVF 60
L Y+ AN ++V +I+A +L A+D+ GTSDPYVKV+L+ DK+ +K +T + ++TLNPVF
Sbjct: 8 LCYNPTANRITVNIIKARNLKAMDINGTSDPYVKVWLMYKDKRVEKKKTVIKKRTLNPVF 67
Query: 61 NETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEV 98
NE+F+F +P TL+ + D DR S++D IG++
Sbjct: 68 NESFIFN-IPLERLRETTLIITVMDKDRLSRNDLIGKI 104
>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 = 94.8 bits (236), Expect = 3e-26
Identities = 40/100 (40%), Positives = 66/100 (66%), Gaps = 3/100 (3%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKK--KKFETKVHRKTLNPVF 60
L Y A L+V +++A++L +D+GG SDPYVK++L+ + K KK +T + ++TLNP +
Sbjct: 8 LRYVPTAGKLTVVILEAKNLKKMDVGGLSDPYVKIHLMQNGKRLKKKKTTIKKRTLNPYY 67
Query: 61 NETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKV 100
NE+F F+ VP+ L+ + D+DR K+D IG+V +
Sbjct: 68 NESFSFE-VPFEQIQKVHLIVTVLDYDRIGKNDPIGKVVL 106
>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 = 94.0 bits (234), Expect = 6e-26
Identities = 51/119 (42%), Positives = 66/119 (55%), Gaps = 4/119 (3%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDM-GGTSDPYVKVYLLPDKKK--KFETKVHRKTLNPV 59
L+YD L V VIQ +DL A D SDPYVK YLLPDK K +T V +KTLNPV
Sbjct: 8 LDYDPKLRELHVHVIQCQDLAAADPKKQRSDPYVKTYLLPDKSNRGKRKTSVKKKTLNPV 67
Query: 60 FNETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQ 118
FNET +K V + + L +++ D ++ +GEV+V L D + T W LQ
Sbjct: 68 FNETLRYK-VEREELPTRVLNLSVWHRDSLGRNSFLGEVEVDLGSWDWSNTQPTWYPLQ 125
>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 = 94.3 bits (235), Expect = 6e-26
Identities = 46/125 (36%), Positives = 75/125 (60%), Gaps = 6/125 (4%)
Query: 2 KLEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPD--KKKKFETKVHRKTLNPV 59
L+ N L+V V +A++L +D G SDPYVK+ L+PD + K +TK +KTLNPV
Sbjct: 5 YLKISVKDNKLTVEVREAKNLIPMDPNGLSDPYVKLKLIPDPKNETKQKTKTIKKTLNPV 64
Query: 60 FNETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEW-RELQ 118
+NETF F P AD ++ L ++D+DR +++D +G + + ++ + ++ W + L
Sbjct: 65 WNETFTFDLKP-AD-KDRRLSIEVWDWDRTTRNDFMGSLSFGVSEL-IKMPVDGWYKLLN 121
Query: 119 SVEGE 123
EGE
Sbjct: 122 QEEGE 126
>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 = 90.7 bits (226), Expect = 7e-25
Identities = 46/114 (40%), Positives = 68/114 (59%), Gaps = 8/114 (7%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY 71
L+V VI AE+LP+ D G SDP+VK YL + +K F+TK +KTLNPV+NE+F VP
Sbjct: 1 LTVDVISAENLPSADRNGKSDPFVKFYL--NGEKVFKTKTIKKTLNPVWNESFE---VPV 55
Query: 72 ADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQSVEGEGG 125
+ L ++D+DR K D +G + L ++ +T E L ++G+GG
Sbjct: 56 PSRVRAVLKVEVYDWDRGGKDDLLGSAYIDLSDLEPEETTE--LTLP-LDGQGG 106
>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 = 91.1 bits (227), Expect = 9e-25
Identities = 40/111 (36%), Positives = 59/111 (53%), Gaps = 9/111 (8%)
Query: 2 KLEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKK----KKFETKVHRKTLN 57
K Y + SL V ++ A +L LD G+SDP+VKV LLP +T+V +KTL
Sbjct: 8 KAYYRASEQSLRVEILNARNLLPLDSNGSSDPFVKVELLPRHLFPDVPTPKTQVKKKTLF 67
Query: 58 PVFNETFVFKGVPYADAMNK---TLVFAIFDFDRFSKHDQIGEVKVALCQI 105
P+F+E+F F VP + + L+F + D+D +D GE + L I
Sbjct: 68 PLFDESFEFN-VP-PEQCSVEGALLLFTVKDYDLLGSNDFEGEAFLPLNDI 116
>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 = 91.3 bits (227), Expect = 9e-25
Identities = 45/117 (38%), Positives = 68/117 (58%), Gaps = 5/117 (4%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKK--KFETKVHRKTLNPVF 60
L Y N L+V V++A LP +D+ G +DPYVKV L KK+ K +T V + TLNPVF
Sbjct: 8 LCYQPTTNRLTVVVLKARHLPKMDVSGLADPYVKVNLYYGKKRISKKKTHVKKCTLNPVF 67
Query: 61 NETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWREL 117
NE+FVF +P + + ++ F + D DR +K++ IG ++ L W+E+
Sbjct: 68 NESFVFD-IPSEELEDISVEFLVLDSDRVTKNEVIG--RLVLGPKASGSGGHHWKEV 121
>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 = 89.7 bits (223), Expect = 3e-24
Identities = 41/98 (41%), Positives = 59/98 (60%), Gaps = 3/98 (3%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPD--KKKKFETKVHRKTLNPVF 60
L Y+ L V +I+ +L A+D G SDP+VK+YL PD KK K +T+V +KTLNP F
Sbjct: 6 LMYNTQRRGLIVGIIRCVNLAAMDANGYSDPFVKLYLKPDAGKKSKHKTQVKKKTLNPEF 65
Query: 61 NETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEV 98
NE F + + ++D KTL ++D D +D IG +
Sbjct: 66 NEEFFYD-IKHSDLAKKTLEITVWDKDIGKSNDYIGGL 102
>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 = 89.3 bits (222), Expect = 4e-24
Identities = 48/115 (41%), Positives = 69/115 (60%), Gaps = 3/115 (2%)
Query: 2 KLEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPD--KKKKFETKVHRKTLNPV 59
KL + +L V V+ A++LP LD G DPYVK YLLPD K K +TKV RKT NP
Sbjct: 5 KLSISYKNGTLFVMVMHAKNLPLLD-GSDPDPYVKTYLLPDPQKTTKRKTKVVRKTRNPT 63
Query: 60 FNETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEW 114
FNE V+ G+P D + L +++ D +++ +G V + L ++DL+Q E+W
Sbjct: 64 FNEMLVYDGLPVEDLQQRVLQVSVWSHDSLVENEFLGGVCIPLKKLDLSQETEKW 118
>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 = 88.1 bits (219), Expect = 1e-23
Identities = 50/116 (43%), Positives = 66/116 (56%), Gaps = 1/116 (0%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNE 62
EYD +A L+VTVI+A+D+P D GG S V + LLP KK++ +TKV R NPVFNE
Sbjct: 9 FEYDPSARKLTVTVIRAQDIPTKDRGGASSWQVHLVLLPSKKQRAKTKVQRGP-NPVFNE 67
Query: 63 TFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQ 118
TF F V + N L F ++ +R K IGE V L Q++L W L+
Sbjct: 68 TFTFSRVEPEELNNMALRFRLYGVERMRKERLIGEKVVPLSQLNLEGETTVWLTLE 123
>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 = 85.6 bits (212), Expect = 1e-22
Identities = 42/119 (35%), Positives = 66/119 (55%), Gaps = 4/119 (3%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGT-SDPYVKVYLLPDK--KKKFETKVHRKTLNPV 59
L YD+ SL+V V + +L D S+PYVK YLLPDK + K +T + R T NPV
Sbjct: 8 LSYDYKTQSLNVHVKECRNLAYGDEAKKRSNPYVKTYLLPDKSRQSKRKTSIKRNTTNPV 67
Query: 60 FNETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQ 118
+NET + + ++ +TL +++ +DRF ++ +GEV++ L + EE L
Sbjct: 68 YNETLKYS-ISHSQLETRTLQLSVWHYDRFGRNTFLGEVEIPLDSWNFDSQHEECLPLH 125
>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 = 81.4 bits (201), Expect = 6e-21
Identities = 40/94 (42%), Positives = 61/94 (64%), Gaps = 3/94 (3%)
Query: 9 ANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKK--KKFETKVHRKTLNPVFNETFVF 66
A L++T+I+A +L A+D+ G SDPYVKV L+ + + KK +T V + TLNP +NE VF
Sbjct: 13 AGRLTLTIIKARNLKAMDITGFSDPYVKVSLMCEGRRLKKKKTSVKKNTLNPTYNEALVF 72
Query: 67 KGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKV 100
VP + N +L+ A+ D+DR ++ IG +V
Sbjct: 73 D-VPPENVDNVSLIIAVVDYDRVGHNELIGVCRV 105
>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 = 71.0 bits (175), Expect = 5e-17
Identities = 34/97 (35%), Positives = 47/97 (48%), Gaps = 15/97 (15%)
Query: 14 VTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVH--RKTLNPVFNETFVFKG-VP 70
V V++A +L D G SDPY+K+ L KKK + + TLNPVF + F + +P
Sbjct: 4 VYVVRARNLQPKDPNGKSDPYLKIKLG---KKKINDRDNYIPNTLNPVFGKMFELEATLP 60
Query: 71 YADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDL 107
N L ++ D+D D IGE IDL
Sbjct: 61 ----GNSILKISVMDYDLLGSDDLIGETV-----IDL 88
>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 = 70.7 bits (173), Expect = 8e-17
Identities = 37/100 (37%), Positives = 58/100 (58%), Gaps = 3/100 (3%)
Query: 1 MKLEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKK--KKFETKVHRKTLNP 58
+ L Y +A L+V +I+A+ L DM SDP+VK+ L+ K K +T R T++P
Sbjct: 5 LSLNYLPSAGRLNVDIIRAKQLLQTDMSQGSDPFVKIQLVHGLKLIKTKKTSCMRGTIDP 64
Query: 59 VFNETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEV 98
+NE+F FK VP + N +LVF ++ + S +D IG +
Sbjct: 65 FYNESFSFK-VPQEELENVSLVFTVYGHNVKSSNDFIGRI 103
>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 = 69.6 bits (171), Expect = 2e-16
Identities = 35/102 (34%), Positives = 52/102 (50%), Gaps = 6/102 (5%)
Query: 11 SLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVP 70
L + + + +L A D GGTSDPYVK K +++K K LNPV++E F +P
Sbjct: 1 QLDIHLKEGRNLAARDRGGTSDPYVKFKY--GGKTVYKSKTIYKNLNPVWDEKFT---LP 55
Query: 71 YADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIE 112
D + L +FD+DR D +G V L ++L + E
Sbjct: 56 IEDV-TQPLYIKVFDYDRGLTDDFMGSAFVDLSTLELNKPTE 96
>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 = 67.4 bits (165), Expect = 2e-15
Identities = 40/129 (31%), Positives = 56/129 (43%), Gaps = 14/129 (10%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKV-YLLPDKKKKFETKVHRKTLNPVFNETFVFKG-- 68
LSV V++ DL AL GT DP+ +V K TKV +KT NP F+E F F+
Sbjct: 1 LSVRVLECRDL-ALKSNGTCDPFARVTLNYSSKTDTKRTKVKKKTNNPRFDEAFYFELTI 59
Query: 69 ----------VPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQ 118
V D L ++ S D +GEV++ L + A + + W LQ
Sbjct: 60 GFSYEKKSFKVEEEDLEKSELRVELWHASMVSGDDFLGEVRIPLQGLQQAGSHQAWYFLQ 119
Query: 119 SVEGEGGQL 127
E G +
Sbjct: 120 PREAPGTRS 128
>gnl|CDD|227371 COG5038, COG5038, Ca2+-dependent lipid-binding protein, contains C2
domain [General function prediction only].
Length = 1227
Score = 70.2 bits (172), Expect = 4e-15
Identities = 35/100 (35%), Positives = 58/100 (58%), Gaps = 10/100 (10%)
Query: 8 NANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFK 67
N+ L++ + E+LP+ D G SDP+VK++L ++K ++TKV +KTLNPV+NE F
Sbjct: 1038 NSGYLTIMLRSGENLPSSDENGYSDPFVKLFL--NEKSVYKTKVVKKTLNPVWNEEFT-- 1093
Query: 68 GVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDL 107
+ + + L + D+D K+D +G +IDL
Sbjct: 1094 -IEVLNRVKDVLTINVNDWDSGEKNDLLGT-----AEIDL 1127
Score = 45.1 bits (107), Expect = 2e-06
Identities = 28/93 (30%), Positives = 47/93 (50%), Gaps = 8/93 (8%)
Query: 12 LSVTVIQAEDLPALD--MGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGV 69
+ V + AE L D + GT DPY+ V + +T+V + TLNPV+NETF +
Sbjct: 438 VEVKIKSAEGLKKSDSTINGTVDPYITVTF--SDRVIGKTRVKKNTLNPVWNETFY---I 492
Query: 70 PYADAMNKTLVFAIFDFDRFSKHDQIGEVKVAL 102
++ L +++DF+ F +G ++ L
Sbjct: 493 L-LNSFTDPLNLSLYDFNSFKSDKVVGSTQLDL 524
Score = 44.0 bits (104), Expect = 4e-06
Identities = 26/92 (28%), Positives = 41/92 (44%), Gaps = 10/92 (10%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY 71
+ V+V +A DL GG SDPY V + + K+ T TLNP++NE + Y
Sbjct: 713 IRVSVRKANDLRNEIPGGKSDPYATVLV--NNLVKYRTIYGSSTLNPIWNE------ILY 764
Query: 72 ADAMNKTLVFAI--FDFDRFSKHDQIGEVKVA 101
+K + D++ +GEV +
Sbjct: 765 VPVTSKNQRLTLECMDYEESGDDRNLGEVNIN 796
>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 = 64.8 bits (158), Expect = 1e-14
Identities = 37/114 (32%), Positives = 57/114 (50%), Gaps = 11/114 (9%)
Query: 12 LSVTVIQAEDLPALDMG--GTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGV 69
L V V++A+DL A D G SDPY + + ++F+T+ TLNP +N F
Sbjct: 3 LRVHVVEAKDLAAKDRSGKGKSDPYAILSV---GAQRFKTQTIPNTLNPKWNYWCEF--- 56
Query: 70 PYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEE---WRELQSV 120
P A N+ L ++D DRF+ D +GE +AL ++ + W L+S
Sbjct: 57 PIFSAQNQLLKLILWDKDRFAGKDYLGEFDIALEEVFADGKTGQSDKWITLKST 110
>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 = 63.9 bits (156), Expect = 3e-14
Identities = 39/118 (33%), Positives = 60/118 (50%), Gaps = 17/118 (14%)
Query: 12 LSVTVIQAEDLPALDMG------GTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETF- 64
L + VI+A+DL A D G SDPYV V + + F++KV ++ LNP +NE +
Sbjct: 3 LRIHVIEAQDLVAKDKFVGGLVKGKSDPYVIVRVGA---QTFKSKVIKENLNPKWNEVYE 59
Query: 65 -VFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQSVE 121
V VP + L +FD D K D +G + + L ++ I+EW L+ V+
Sbjct: 60 AVVDEVP-----GQELEIELFDEDP-DKDDFLGRLSIDLGSVEKKGFIDEWLPLEDVK 111
>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 = 63.4 bits (155), Expect = 3e-14
Identities = 42/110 (38%), Positives = 56/110 (50%), Gaps = 9/110 (8%)
Query: 11 SLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVP 70
SL + +++A++LP+ GT DPY V L D+ + TK + LNP + E FVF P
Sbjct: 1 SLRLRILEAKNLPS---KGTRDPYCTVSL--DQVEVARTKT-VEKLNPFWGEEFVFD-DP 53
Query: 71 YADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQSV 120
D TL F D SK I KVAL ++DL Q +EW L V
Sbjct: 54 PPDVTFFTLSFYNKDKR--SKDRDIVIGKVALSKLDLGQGKDEWFPLTPV 101
>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 = 63.4 bits (155), Expect = 4e-14
Identities = 35/92 (38%), Positives = 51/92 (55%), Gaps = 1/92 (1%)
Query: 12 LSVTVIQAEDLPALDMG-GTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVP 70
L VT+ +A DLP D G G+SDPYV K + T++ RK LNPV+ ET+ P
Sbjct: 3 LVVTIHRATDLPKADFGTGSSDPYVTASFAKFGKPLYSTRIIRKDLNPVWEETWFVLVTP 62
Query: 71 YADAMNKTLVFAIFDFDRFSKHDQIGEVKVAL 102
+ L ++D DRF+ D++G V++ L
Sbjct: 63 DEVKAGERLSCRLWDSDRFTADDRLGRVEIDL 94
>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 = 63.0 bits (154), Expect = 5e-14
Identities = 30/110 (27%), Positives = 50/110 (45%), Gaps = 18/110 (16%)
Query: 14 VTVIQAEDLPAL--------DMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFV 65
+ + DLP L DM DP+V + ++ F T R TLNPVFNE
Sbjct: 5 MEIKSITDLPPLKNMTRTGFDM----DPFVIISF---GRRVFRTSWRRHTLNPVFNERLA 57
Query: 66 FKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQ-IDLAQTIEEW 114
F+ P+ N + F + D D+FS +D + +++ + ++ A +
Sbjct: 58 FEVYPH--EKNFDIQFKVLDKDKFSFNDYVATGSLSVQELLNAAPQPDPE 105
>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 = 61.7 bits (150), Expect = 2e-13
Identities = 36/107 (33%), Positives = 58/107 (54%), Gaps = 6/107 (5%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY 71
L V++A DL D GTSDP+V+V+ + ET V +K+ P +NE F F+ +
Sbjct: 2 LRCHVLEARDLAPKDRNGTSDPFVRVFY---NGQTLETSVVKKSCYPRWNEVFEFELMEG 58
Query: 72 ADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQ 118
AD+ L ++D+D SK+D +G+V ++ + A+ E W L
Sbjct: 59 ADSP---LSVEVWDWDLVSKNDFLGKVVFSIQTLQQAKQEEGWFRLL 102
>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 = 61.3 bits (149), Expect = 4e-13
Identities = 36/119 (30%), Positives = 58/119 (48%), Gaps = 5/119 (4%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKK--KFETKVHRKTLNPVF 60
L Y A L+V V++A +L + T+DP+VKVYLL D +K K +T V R NP+F
Sbjct: 8 LSYLPTAERLTVVVVKARNLVWDNGKTTADPFVKVYLLQDGRKISKKKTSVKRDDTNPIF 67
Query: 61 NETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQS 119
NE +F VP + +L + + K +G V + + + W ++ +
Sbjct: 68 NEAMIFS-VPAIVLQDLSLRVTVAESTEDGKTPNVGHVIIGPAASGMG--LSHWNQMLA 123
>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 = 61.6 bits (150), Expect = 4e-13
Identities = 35/91 (38%), Positives = 47/91 (51%), Gaps = 8/91 (8%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY 71
L V V++ +L D +SDPYV + L K K T+V +K LNPV+NE VP
Sbjct: 4 LKVRVVRGTNLAVRDFT-SSDPYVVLTLGNQKVK---TRVIKKNLNPVWNEELTL-SVP- 57
Query: 72 ADAMNKTLVFAIFDFDRFSKHDQIGEVKVAL 102
L +FD D FSK D +GE ++ L
Sbjct: 58 --NPMAPLKLEVFDKDTFSKDDSMGEAEIDL 86
>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 = 61.2 bits (149), Expect = 4e-13
Identities = 36/95 (37%), Positives = 51/95 (53%), Gaps = 8/95 (8%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKK----KKFETKVHRKTLNPVFNETFVFK 67
L V V+ DL D+ G SDPYVK+ L +TK +KTLNP +NE F F+
Sbjct: 2 LRVKVLAGIDLAKKDIFGASDPYVKISLYDPDGNGEIDSVQTKTIKKTLNPKWNEEFFFR 61
Query: 68 GVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVAL 102
P L+F +FD +R ++ D +G+V+V L
Sbjct: 62 VNP----REHRLLFEVFDENRLTRDDFLGQVEVPL 92
>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 = 60.0 bits (146), Expect = 8e-13
Identities = 33/94 (35%), Positives = 51/94 (54%), Gaps = 7/94 (7%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY 71
L V VI+A L A D+GG SDP+ + L+ + +T KTLNP +N+ F F P
Sbjct: 3 LQVKVIRASGLAAADIGGKSDPFCVLELVNA---RLQTHTIYKTLNPEWNKIFTF---PI 56
Query: 72 ADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQI 105
D ++ L ++D D+ K + +G+V + L I
Sbjct: 57 KD-IHDVLEVTVYDEDKDKKPEFLGKVAIPLLSI 89
>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 = 59.2 bits (144), Expect = 1e-12
Identities = 32/93 (34%), Positives = 51/93 (54%), Gaps = 6/93 (6%)
Query: 12 LSVTVIQAEDLPALD-MGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFN-ETFVFKGV 69
L V V+ A DLP +D +D +V+V ++T V +K+LNPV+N E F F+ V
Sbjct: 1 LKVRVVAARDLPVMDRSSDLTDAFVEVKFG---STTYKTDVVKKSLNPVWNSEWFRFE-V 56
Query: 70 PYADAMNKTLVFAIFDFDRFSKHDQIGEVKVAL 102
+ ++ L + D D +S +D IG+V + L
Sbjct: 57 DDEELQDEPLQIRVMDHDTYSANDAIGKVYIDL 89
>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 = 57.2 bits (139), Expect = 8e-12
Identities = 27/89 (30%), Positives = 38/89 (42%), Gaps = 8/89 (8%)
Query: 13 SVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFK-GVPY 71
V VI+A L GG DP VKV + KK T V + T P +NE F F
Sbjct: 7 RVRVIEARQLV----GGNIDPVVKVEVGGQKKY---TSVKKGTNCPFYNEYFFFNFHESP 59
Query: 72 ADAMNKTLVFAIFDFDRFSKHDQIGEVKV 100
+ +K + +++D IG K+
Sbjct: 60 DELFDKIIKISVYDSRSLRSDTLIGSFKL 88
>gnl|CDD|176022 cd08376, C2B_MCTP_PRT, C2 domain second repeat found in Multiple C2
domain and Transmembrane region Proteins (MCTP). MCTPs
are involved in Ca2+ signaling at the membrane. MCTP is
composed of a variable N-terminal sequence, three C2
domains, two transmembrane regions (TMRs), and a short
C-terminal sequence. It is one of four protein classes
that are anchored to membranes via a transmembrane
region; the others being synaptotagmins, extended
synaptotagmins, and ferlins. MCTPs are the only
membrane-bound C2 domain proteins that contain two
functional TMRs. MCTPs are unique in that they bind Ca2+
but not phospholipids. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 116
Score = 55.7 bits (135), Expect = 4e-11
Identities = 38/117 (32%), Positives = 62/117 (52%), Gaps = 8/117 (6%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY 71
+++ +++ ++LP +D G SDPYVK L +K+++KV KTLNP + E F
Sbjct: 2 VTIVLVEGKNLPPMDDNGLSDPYVKFRL---GNEKYKSKVCSKTLNPQWLEQFDLH---L 55
Query: 72 ADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQSVEGEGGQLL 128
D ++ L ++D D K + IG ++ L + QT EL+ +GEG LL
Sbjct: 56 FDDQSQILEIEVWDKDTGKKDEFIGRCEIDLSALPREQTHSLELELE--DGEGSLLL 110
>gnl|CDD|175984 cd04017, C2D_Ferlin, C2 domain fourth repeat in Ferlin. Ferlins
are involved in vesicle fusion events. Ferlins and
other proteins, such as Synaptotagmins, are implicated
in facilitating the fusion process when cell membranes
fuse together. There are six known human Ferlins:
Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin
(Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these
genes can lead to a wide range of diseases including
muscular dystrophy (dysferlin), deafness (otoferlin),
and infertility (fer-1, fertilization factor-1).
Structurally they have 6 tandem C2 domains, designated
as (C2A-C2F) and a single C-terminal transmembrane
domain, though there is a new study that disputes this
and claims that there are actually 7 tandem C2 domains
with another C2 domain inserted between C2D and C2E.
In a subset of them (Dysferlin, Myoferlin, and Fer1)
there is an additional conserved domain called DysF. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the fourth C2
repeat, C2D, and has a type-II topology.
Length = 135
Score = 54.9 bits (133), Expect = 1e-10
Identities = 34/123 (27%), Positives = 58/123 (47%), Gaps = 17/123 (13%)
Query: 18 QAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY---ADA 74
QA DL A D G SDP+ +V L + ET+V ++TL+P +++T +F V +
Sbjct: 9 QARDLLAADKSGLSDPFARVSFLNQSQ---ETEVIKETLSPTWDQTLIFDEVELYGSPEE 65
Query: 75 MNK---TLVFAIFDFDRFSKHDQIG------EVKVALCQIDLAQTIEEWRELQSVEGEGG 125
+ + +V +FD D K + +G VK+ L + + +W + G
Sbjct: 66 IAQNPPLVVVELFDQDSVGKDEFLGRSVAKPLVKLDLEEDFPPKL--QWFPIYKGGQSAG 123
Query: 126 QLL 128
+LL
Sbjct: 124 ELL 126
>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 = 54.9 bits (133), Expect = 1e-10
Identities = 33/93 (35%), Positives = 46/93 (49%), Gaps = 12/93 (12%)
Query: 11 SLSVTVIQAEDLP--ALDMGGTSDPYVKVYLL---PDKKKKFETK-VHRKTLNPVFNETF 64
+L++ +I + LP D G DPYV+V + D KF+TK V NPV+NETF
Sbjct: 3 TLTIKIISGQQLPKPKGDKGSIVDPYVEVEIHGLPADDSAKFKTKVVKNNGFNPVWNETF 62
Query: 65 VFKGVPYAD-AMNKTLVFAIFDFDRFSKHDQIG 96
F V + A L F ++D D D +G
Sbjct: 63 EFD-VTVPELAF---LRFVVYDEDSG-DDDFLG 90
>gnl|CDD|175994 cd04028, C2B_RIM1alpha, C2 domain second repeat contained in
Rab3-interacting molecule (RIM) proteins. RIMs are
believed to organize specialized sites of the plasma
membrane called active zones. They also play a role in
controlling neurotransmitter release, plasticity
processes, as well as memory and learning. RIM contains
an N-terminal zinc finger domain, a PDZ domain, and two
C-terminal C2 domains (C2A, C2B). C2 domains fold into
an 8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members here have a type-I
topology and do not bind Ca2+.
Length = 146
Score = 53.5 bits (129), Expect = 4e-10
Identities = 39/110 (35%), Positives = 56/110 (50%), Gaps = 8/110 (7%)
Query: 12 LSVTVIQAEDL-PALDMGGTSDPYVKVYLLPDKK--KKFETKVHRKTLNPVFNETFVFKG 68
L V VI+A L PYVKVYLL KK K +TK+ RKTL+P++ + VF
Sbjct: 31 LEVEVIRARGLVQKPGSKVLPAPYVKVYLLEGKKCIAKKKTKIARKTLDPLYQQQLVFDV 90
Query: 69 VPYADAMNKTLVFAIF-DFDRFSKHDQIGEVKVALCQIDLAQTIEEWREL 117
P KTL ++ D+ R K +G ++ L +DL+ + W +L
Sbjct: 91 SPT----GKTLQVIVWGDYGRMDKKVFMGVAQILLDDLDLSNLVIGWYKL 136
>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 = 52.7 bits (127), Expect = 7e-10
Identities = 18/54 (33%), Positives = 27/54 (50%), Gaps = 3/54 (5%)
Query: 13 SVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVF 66
V V AE L D GG +DPYV + + + + V + TL+P F+ +F
Sbjct: 6 QVHVHSAEGLSKQDSGGGADPYVIIK---CEGESVRSPVQKDTLSPEFDTQAIF 56
>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 = 51.8 bits (125), Expect = 1e-09
Identities = 27/105 (25%), Positives = 48/105 (45%), Gaps = 12/105 (11%)
Query: 17 IQAEDLPALDMGGTSDPYVKVY-LLPDKKKK--FETKVHRKTLNPVFNETFVFKGVPYAD 73
+ L D G SDP++++ D + T+V + TLNPV+ F +P
Sbjct: 7 FSGKKLDKKDFFGKSDPFLEISRQSEDGTWVLVYRTEVIKNTLNPVWKP---FT-IPLQK 62
Query: 74 A----MNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEW 114
++ + ++D+D KHD IGE + L ++ L + E+
Sbjct: 63 LCNGDYDRPIKIEVYDYDSSGKHDLIGEFETTLDEL-LKSSPLEF 106
>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 = 52.1 bits (125), Expect = 1e-09
Identities = 28/68 (41%), Positives = 37/68 (54%), Gaps = 3/68 (4%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGTS-DPYVKVYLLPDKKK--KFETKVHRKTLNPV 59
L Y+F + L +T+ +L D PYVKV LLPDK K +T V + T+NPV
Sbjct: 8 LHYNFRTSCLEITIKACRNLAYGDEKKKKCHPYVKVCLLPDKSHNSKRKTAVKKGTVNPV 67
Query: 60 FNETFVFK 67
FNET +
Sbjct: 68 FNETLKYV 75
>gnl|CDD|176001 cd04036, C2_cPLA2, C2 domain present in cytosolic PhosphoLipase
A2 (cPLA2). A single copy of the C2 domain is present
in cPLA2 which releases arachidonic acid from membranes
initiating the biosynthesis of potent inflammatory
mediators such as prostaglandins, leukotrienes, and
platelet-activating factor. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of
piccolo/aczonin and intersectin which only have a
single C2 domain. C2 domains with a calcium binding
region have negatively charged residues, primarily
aspartates, that serve as ligands for calcium ions.
Members of this cd have a type-II topology.
Length = 119
Score = 51.5 bits (124), Expect = 1e-09
Identities = 21/56 (37%), Positives = 36/56 (64%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFK 67
L+V V++A ++ D+ T D YV+++L +K TK + ++NPV+NETF F+
Sbjct: 2 LTVRVLRATNITKGDLLSTPDCYVELWLPTASDEKKRTKTIKNSINPVWNETFEFR 57
>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 = 51.5 bits (124), Expect = 2e-09
Identities = 29/81 (35%), Positives = 36/81 (44%), Gaps = 4/81 (4%)
Query: 2 KLEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLP---DKKKKFETKVHRKTLNP 58
L YD +SL ++V Q +L AL + S YV+V LLP F TK P
Sbjct: 6 GLRYDSGDSSLVISVEQLRNLSALSIPENSKVYVRVALLPCSSSTSCLFRTKALEDQDKP 65
Query: 59 VFNETFVFKGVPYADAMNKTL 79
VFNE F + KTL
Sbjct: 66 VFNEVFRVP-ISSTKLYQKTL 85
>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 = 51.5 bits (124), Expect = 2e-09
Identities = 27/87 (31%), Positives = 42/87 (48%), Gaps = 9/87 (10%)
Query: 13 SVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFE---TKVHRKTLNPVFNETFVFKGV 69
++ +++AE+L A G SDPYV L D K T+ TLNP ++E F + V
Sbjct: 4 TIRIVRAENLKADSSNGLSDPYV---TLVDTNGKRRIAKTRTIYDTLNPRWDEEFELE-V 59
Query: 70 PYADAMNKTLVFAIFDFDRFSKHDQIG 96
P + + + ++D KHD G
Sbjct: 60 PAGEPL--WISATVWDRSFVGKHDLCG 84
>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 = 51.2 bits (123), Expect = 3e-09
Identities = 28/58 (48%), Positives = 32/58 (55%), Gaps = 6/58 (10%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKK---KFETKVHRKTLNPVFNETFVF 66
LSV VI+ DL GT DPY V L+ KK K TKV +KT NP F+E F F
Sbjct: 2 LSVRVIECSDLAL--KNGTCDPYASVTLIYSNKKQDTKR-TKVKKKTNNPQFDEAFYF 56
>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 = 50.6 bits (121), Expect = 4e-09
Identities = 39/122 (31%), Positives = 59/122 (48%), Gaps = 17/122 (13%)
Query: 11 SLSVTVIQAEDLPALDMGGTSDPY--VKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKG 68
SL + +++ ++LPA D+ G+SDPY VKV D + T KTLNP + E +
Sbjct: 1 SLYIRIVEGKNLPAKDITGSSDPYCIVKV----DNEVIIRTATVWKTLNPFWGEEYTVHL 56
Query: 69 VPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDL-AQTIEEWREL------QSVE 121
P T+ F + D D S+ D IG+V + I + I+ W L + V+
Sbjct: 57 PPGF----HTVSFYVLDEDTLSRDDVIGKVSLTREVISAHPRGIDGWMNLTEVDPDEEVQ 112
Query: 122 GE 123
GE
Sbjct: 113 GE 114
>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 = 50.6 bits (122), Expect = 4e-09
Identities = 29/97 (29%), Positives = 43/97 (44%), Gaps = 11/97 (11%)
Query: 17 IQAEDLPALDMGGTSDPYVKVYLLPDKKKKFE----TKVHRKTLNPVFNETFVFKGVPYA 72
I +L D+ SDP+V VY+ ++ T+V + LNP F TF Y
Sbjct: 7 ISCRNLLDKDVLSKSDPFVVVYVKTGGSGQWVEIGRTEVIKNNLNPDFVTTFTV---DYY 63
Query: 73 DAMNKTLVFAIFDFD----RFSKHDQIGEVKVALCQI 105
+ L F ++D D S HD +GE + L +I
Sbjct: 64 FEEVQKLRFEVYDVDSKSKDLSDHDFLGEAECTLGEI 100
>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 = 50.4 bits (121), Expect = 4e-09
Identities = 28/95 (29%), Positives = 45/95 (47%), Gaps = 4/95 (4%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY 71
L V V+ A+DL D G+S YV++ KK+ T+ K LNPV+NE VF
Sbjct: 2 LVVEVVDAQDLMPKDGQGSSSAYVELDFDGQKKR---TRTKPKDLNPVWNEKLVFNVSDP 58
Query: 72 ADAMNKTLVFAIFDFDRFS-KHDQIGEVKVALCQI 105
+ N L +++ R + +G V+++
Sbjct: 59 SRLSNLVLEVYVYNDRRSGRRRSFLGRVRISGTSF 93
>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 = 50.1 bits (120), Expect = 5e-09
Identities = 24/68 (35%), Positives = 40/68 (58%), Gaps = 3/68 (4%)
Query: 1 MKLEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFE--TKVHRKTLNP 58
+KL + L++ V++A+ L + + GT + YVK+ L PDK+ +F T + NP
Sbjct: 3 LKLSIEGQNRKLTLHVLEAKGLRSTN-SGTCNSYVKISLSPDKEVRFRQKTSTVPDSANP 61
Query: 59 VFNETFVF 66
+F+ETF F
Sbjct: 62 LFHETFSF 69
>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 = 50.4 bits (121), Expect = 6e-09
Identities = 32/97 (32%), Positives = 49/97 (50%), Gaps = 4/97 (4%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKK---KFETKVHRKTLNPV 59
LEY+ LSV VI+ + L M D YVK+ LL + K +T + R +P
Sbjct: 8 LEYNALTGRLSVEVIKGSNFKNLAMNKAPDTYVKLTLLNSDGQEISKSKTSIRRGQPDPE 67
Query: 60 FNETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIG 96
F ETFVF+ V TL+F++++ + + + IG
Sbjct: 68 FKETFVFQ-VALFQLSEVTLMFSVYNKRKMKRKEMIG 103
>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 = 49.9 bits (119), Expect = 7e-09
Identities = 27/56 (48%), Positives = 36/56 (64%), Gaps = 3/56 (5%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFK 67
+S+TV+ A+ L A D GTSDPYV V + KK+ TK + LNPV+NE F F+
Sbjct: 3 ISITVVCAQGLIAKDKTGTSDPYVTVQVGKTKKR---TKTIPQNLNPVWNEKFHFE 55
>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 = 49.3 bits (118), Expect = 1e-08
Identities = 36/112 (32%), Positives = 45/112 (40%), Gaps = 21/112 (18%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTL------NPVFNETFV 65
L V +I A+ L D G DPYV + + T+ + + NP +NE F
Sbjct: 3 LEVLLISAKGLQDTDFLGKIDPYVII--------QCRTQERKSKVAKGDGRNPEWNEKFK 54
Query: 66 FKGVPYADAMNKT-LVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRE 116
F V Y T L+ I D D FS D IGE I L EE E
Sbjct: 55 FT-VEYPGWGGDTKLILRIMDKDNFSDDDFIGEAT-----IHLKGLFEEGVE 100
>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 = 48.7 bits (117), Expect = 2e-08
Identities = 28/96 (29%), Positives = 45/96 (46%), Gaps = 16/96 (16%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY 71
L + + +A DL L+ G DPYV+V L + K T TLNPV++E VP
Sbjct: 3 LRLHIRKANDLKNLEGVGKIDPYVRV--LVNGIVKGRTVTISNTLNPVWDEVLY---VPV 57
Query: 72 ADAMNKTLVFAIFDF-----DRFSKHDQIGEVKVAL 102
+ N+ + + D+ DR +G V++ +
Sbjct: 58 T-SPNQKITLEVMDYEKVGKDRS-----LGSVEINV 87
>gnl|CDD|176058 cd08676, C2A_Munc13-like, C2 domain first repeat in Munc13
(mammalian uncoordinated)-like proteins. C2-like
domains are thought to be involved in phospholipid
binding in a Ca2+ independent manner in both Unc13 and
Munc13. Caenorabditis elegans Unc13 has a central domain
with sequence similarity to PKC, which includes C1 and
C2-related domains. Unc13 binds phorbol esters and DAG
with high affinity in a phospholipid manner. Mutations
in Unc13 results in abnormal neuronal connections and
impairment in cholinergic neurotransmission in the
nematode. Munc13 is the mammalian homolog which are
expressed in the brain. There are 3 isoforms (Munc13-1,
-2, -3) and are thought to play a role in
neurotransmitter release and are hypothesized to be
high-affinity receptors for phorbol esters. Unc13 and
Munc13 contain both C1 and C2 domains. There are two C2
related domains present, one central and one at the
carboxyl end. Munc13-1 contains a third C2-like domain.
Munc13 interacts with syntaxin, synaptobrevin, and
synaptotagmin suggesting a role for these as scaffolding
proteins. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 153
Score = 48.9 bits (117), Expect = 3e-08
Identities = 29/81 (35%), Positives = 39/81 (48%), Gaps = 26/81 (32%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPD--------KKKKFE--------------- 48
L VTVI+A+ L A D+ G SDPY + ++P KK+
Sbjct: 30 LKVTVIEAKGLLAKDVNGFSDPYCMLGIVPASRERNSEKSKKRKSHRKKAVLKDTVPAKS 89
Query: 49 ---TKVHRKTLNPVFNETFVF 66
T+V +TLNPV+NETF F
Sbjct: 90 IKVTEVKPQTLNPVWNETFRF 110
>gnl|CDD|176045 cd08400, C2_Ras_p21A1, C2 domain present in RAS p21 protein
activator 1 (RasA1). RasA1 is a GAP1 (GTPase activating
protein 1), a Ras-specific GAP member, which suppresses
Ras function by enhancing the GTPase activity of Ras
proteins resulting in the inactive GDP-bound form of
Ras. In this way it can control cellular proliferation
and differentiation. RasA1 contains a C2 domain, a
Ras-GAP domain, a pleckstrin homology (PH)-like domain,
a SH3 domain, and 2 SH2 domains. C2 domains fold into an
8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. Members here have a type-I
topology.
Length = 126
Score = 47.0 bits (112), Expect = 9e-08
Identities = 36/109 (33%), Positives = 57/109 (52%), Gaps = 9/109 (8%)
Query: 11 SLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVP 70
SL + V++A LP + PY + L ++ K TKV R+ NPV++E FVF +P
Sbjct: 5 SLQLNVLEAHKLP---VKHVPHPYCVISL--NEVKVARTKV-REGPNPVWSEEFVFDDLP 58
Query: 71 YADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRELQS 119
D + T+ ++ + + SK +I EV V L ++ Q +EW L S
Sbjct: 59 -PDVNSFTI--SLSNKAKRSKDSEIAEVTVQLSKLQNGQETDEWYPLSS 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 = 45.7 bits (109), Expect = 2e-07
Identities = 26/101 (25%), Positives = 40/101 (39%), Gaps = 13/101 (12%)
Query: 26 DMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFN---ETFVFKGVPYADAMNKTLVFA 82
G PY ++YL + K + T+V +KT NP +N E V D +
Sbjct: 8 SKTGLLSPYAELYL--NGKLVYTTRVKKKTNNPSWNASTEFLVT------DRRKSRVTVV 59
Query: 83 IFDFDRFSKHDQIGEVKVALCQ-IDLAQTIEEWRELQSVEG 122
+ D DR +G V ++L ID ++W L
Sbjct: 60 VKD-DRDRHDPVLGSVSISLNDLIDATSVGQQWFPLSGNGQ 99
>gnl|CDD|176016 cd04051, C2_SRC2_like, C2 domain present in Soybean genes Regulated
by Cold 2 (SRC2)-like proteins. SRC2 production is a
response to pathogen infiltration. The initial response
of increased Ca2+ concentrations are coupled to
downstream signal transduction pathways via calcium
binding proteins. SRC2 contains a single C2 domain
which localizes to the plasma membrane and is involved
in Ca2+ dependent protein binding. C2 domains fold into
an 8-standed beta-sandwich that can adopt 2 structural
arrangements: Type I and Type II, distinguished by a
circular permutation involving their N- and C-terminal
beta strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 125
Score = 45.3 bits (108), Expect = 3e-07
Identities = 32/100 (32%), Positives = 49/100 (49%), Gaps = 10/100 (10%)
Query: 11 SLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRK--TLNPVFNETFVFKG 68
+L +T+I AEDL +++ G Y V++ P K+ T V R T NP +NET F
Sbjct: 1 TLEITIISAEDLKNVNLFGKMKVYAVVWIDPSHKQS--TPVDRDGGT-NPTWNETLRF-P 56
Query: 69 VP--YADAMNKTLVFAIFDFDRFSKHDQ-IGEVKVALCQI 105
+ L ++ +R S D+ IGEV+V L +
Sbjct: 57 LDERLLQQGRLALTIEVYC-ERPSLGDKLIGEVRVPLKDL 95
>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 = 45.5 bits (108), Expect = 3e-07
Identities = 33/114 (28%), Positives = 52/114 (45%), Gaps = 7/114 (6%)
Query: 13 SVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNE--TFVFKGVP 70
VTV+QA L GT+D YV + L K+K+ T V KT +PV+ E +F G+
Sbjct: 2 QVTVLQARGLLCKGKSGTNDAYVIIQL---GKEKYSTSVKEKTTSPVWKEECSFELPGLL 58
Query: 71 YADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIE--EWRELQSVEG 122
+ TL + + +G+V + L +D + W +L+S G
Sbjct: 59 SGNGNRATLQLTVMHRNLLGLDKFLGQVSIPLNDLDEDKGRRRTRWFKLESKPG 112
>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 = 45.2 bits (108), Expect = 4e-07
Identities = 31/100 (31%), Positives = 49/100 (49%), Gaps = 13/100 (13%)
Query: 12 LSVTVIQAEDLPALD-MGGTSDPYVKVYLLPDKKKKFE-TKVHRKTLNPVFNETFVFKGV 69
L+VT+ A L D +GGT DPYV + +++ TKV + T NPV+NET
Sbjct: 4 LAVTIKSARGLKGSDIIGGTVDPYVTFSI--SNRRELARTKVKKDTSNPVWNETKYI--- 58
Query: 70 PYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQ 109
+++ + L ++DF+ K IG + DL+
Sbjct: 59 -LVNSLTEPLNLTVYDFNDKRKDKLIGTA-----EFDLSS 92
>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 = 45.3 bits (108), Expect = 6e-07
Identities = 28/100 (28%), Positives = 41/100 (41%), Gaps = 19/100 (19%)
Query: 11 SLSVTVIQAEDLPALD---MGGT-----------SDPYVKVYLLPDKKKKFETKVHRKTL 56
+ +AEDLP +D M DPYV+V +K +T V + +
Sbjct: 1 RFIFKIYRAEDLPQMDSGIMANVKKAFLGEKKELVDPYVEVSFA---GQKVKTSVKKNSY 57
Query: 57 NPVFNETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIG 96
NP +NE VF + + + I D+DR D IG
Sbjct: 58 NPEWNEQIVFP--EMFPPLCERIKIQIRDWDRVGNDDVIG 95
>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 = 44.3 bits (105), Expect = 8e-07
Identities = 24/59 (40%), Positives = 32/59 (54%), Gaps = 5/59 (8%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYL----LPDKKKKFETKVHRKTLNPVFNETFVF 66
++V V+ A DL G P+V+V L L DKK+KF TK +P +NETF F
Sbjct: 2 VTVKVVAANDL-KWQTTGMFRPFVEVNLIGPHLSDKKRKFATKSKNNNWSPKYNETFQF 59
>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 = 43.7 bits (104), Expect = 9e-07
Identities = 25/110 (22%), Positives = 47/110 (42%), Gaps = 11/110 (10%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY 71
L V + A++LP PYV++ + +K +KV +T NPV+ E F F
Sbjct: 2 LFVYLDSAKNLPLAKSTKEPSPYVEL-TVGKTTQK--SKVKERTNNPVWEEGFTFL---V 55
Query: 72 ADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQ--TIEEWRELQS 119
+ N+ L + D +G + + L ++ T+++ L +
Sbjct: 56 RNPENQELEIEVKDDKTGK---SLGSLTLPLSELLKEPDLTLDQPFPLDN 102
>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 = 44.2 bits (105), Expect = 9e-07
Identities = 30/93 (32%), Positives = 44/93 (47%), Gaps = 10/93 (10%)
Query: 15 TVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVF--KGVPYA 72
V+ ++LP L G D KV KKK T+V LNPV+NETF + G P
Sbjct: 1 LVVSLKNLPGL--KGKGDRIAKVTFRGVKKK---TRVLENELNPVWNETFEWPLAGSPDP 55
Query: 73 DAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQI 105
D L + D+++ ++ IG V+L +
Sbjct: 56 DES---LEIVVKDYEKVGRNRLIGSATVSLQDL 85
>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 = 44.3 bits (105), Expect = 1e-06
Identities = 32/92 (34%), Positives = 45/92 (48%), Gaps = 8/92 (8%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY 71
L V +++ DL + G SDPY +V + + K TKV TLNP +N + F
Sbjct: 17 LMVVIVEGRDLKPCNSNGKSDPYCEVSMGSQEHK---TKVVSDTLNPKWNSSMQFF---V 70
Query: 72 ADAMNKTLVFAIFDFDRFSKHDQIG--EVKVA 101
D L +FD D FS D +G E++VA
Sbjct: 71 KDLEQDVLCITVFDRDFFSPDDFLGRTEIRVA 102
>gnl|CDD|176063 cd08681, C2_fungal_Inn1p-like, C2 domain found in fungal Ingression
1 (Inn1) proteins. Saccharomyces cerevisiae Inn1
associates with the contractile actomyosin ring at the
end of mitosis and is needed for cytokinesis. The C2
domain of Inn1, located at the N-terminus, is required
for ingression of the plasma membrane. The C-terminus is
relatively unstructured and contains eight PXXP motifs
that are thought to mediate interaction of Inn1 with
other proteins with SH3 domains in the cytokinesis
proteins Hof1 (an F-BAR protein) and Cyk3 (whose
overexpression can restore primary septum formation in
Inn1Delta cells) as well as recruiting Inn1 to the
bud-neck by binding to Cyk3. Inn1 and Cyk3 appear to
cooperate in activating chitin synthase Chs2 for primary
septum formation, which allows coordination of
actomyosin ring contraction with ingression of the
cleavage furrow. It is thought that the C2 domain of
Inn1 helps to preserve the link between the actomyosin
ring and the plasma membrane, contributing both to
membrane ingression, as well as to stability of the
contracting ring. Additionally, Inn1 might induce
curvature of the plasma membrane adjacent to the
contracting ring, thereby promoting ingression of the
membrane. It has been shown that the C2 domain of human
synaptotagmin induces curvature in target membranes and
thereby contributes to fusion of these membranes with
synaptic vesicles. The C2 domain was first identified in
PKC. C2 domains fold into an 8-standed beta-sandwich
that can adopt 2 structural arrangements: Type I and
Type II, distinguished by a circular permutation
involving their N- and C-terminal beta strands. Many C2
domains are Ca2+-dependent membrane-targeting modules
that bind a wide variety of substances including bind
phospholipids, inositol polyphosphates, and
intracellular proteins. Most C2 domain proteins are
either signal transduction enzymes that contain a single
C2 domain, such as protein kinase C, or membrane
trafficking proteins which contain at least two C2
domains, such as synaptotagmin1. However, there are a
few exceptions to this including RIM isoforms and some
splice variants of piccolo/aczonin and intersectin which
only have a single C2 domain. C2 domains with a calcium
binding region have negatively charged residues,
primarily aspartates, that serve as ligands for calcium
ions.
Length = 118
Score = 43.0 bits (102), Expect = 2e-06
Identities = 33/123 (26%), Positives = 51/123 (41%), Gaps = 18/123 (14%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKV-HRKTLNPVFNETFVFKGVP 70
L V V++A +LP DPY + + KK TK R +P ++E F
Sbjct: 3 LVVVVLKARNLPNKRKLDKQDPYCVLRIGGVTKK---TKTDFRGGQHPEWDEELRF---E 56
Query: 71 YADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEE-----WRELQSVEGEGG 125
+ L A+FD D K D IG+ ++DL+ ++E W EL G
Sbjct: 57 ITEDKKPILKVAVFD-DDKRKPDLIGD-----TEVDLSPALKEGEFDDWYELTLKGRYAG 110
Query: 126 QLL 128
++
Sbjct: 111 EVY 113
>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 = 43.1 bits (102), Expect = 3e-06
Identities = 32/100 (32%), Positives = 46/100 (46%), Gaps = 4/100 (4%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKK--KKFETKVHRKTLNPVF 60
L Y+ N L+V V++A L LD T YVKV L+ K K +T+V +P F
Sbjct: 8 LTYNPTLNRLTVVVLRARGLRQLDHAHT-SVYVKVSLMIHNKVVKTKKTEVVDGAASPSF 66
Query: 61 NETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKV 100
NE+F FK V +L ++ K +G V +
Sbjct: 67 NESFSFK-VTSRQLDTASLSLSVMQSGGVRKSKLLGRVVL 105
>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 = 42.0 bits (99), Expect = 6e-06
Identities = 37/114 (32%), Positives = 54/114 (47%), Gaps = 11/114 (9%)
Query: 11 SLSVTVIQAEDLPALD-MGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGV 69
SL + + +A++LP D Y V L D+++ F TK K+L P F E F F+ +
Sbjct: 1 SLKIKIGEAKNLPPRSGPNKMRDCYCTVNL--DQEEVFRTKTVEKSLCPFFGEDFYFE-I 57
Query: 70 PYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLA--QTIEEWRELQSVE 121
P L F I+D D + IG KVA+ + DL + W LQ V+
Sbjct: 58 PRTFRH---LSFYIYDRDVLRRDSVIG--KVAIKKEDLHKYYGKDTWFPLQPVD 106
>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 = 40.0 bits (94), Expect = 4e-05
Identities = 24/84 (28%), Positives = 40/84 (47%), Gaps = 7/84 (8%)
Query: 11 SLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVP 70
+ +TV+ A+ L D+ DP+ + + D + T V +KTL+P +NE F P
Sbjct: 1 KVRLTVLCADGLAKRDLFRLPDPFAVITV--DGGQTHSTDVAKKTLDPKWNEHFDLTVGP 58
Query: 71 YADAMNKTLVFAIFDFDRFSKHDQ 94
+ + +FD +F K DQ
Sbjct: 59 -----SSIITIQVFDQKKFKKKDQ 77
>gnl|CDD|175986 cd04019, C2C_MCTP_PRT_plant, C2 domain third repeat found in
Multiple C2 domain and Transmembrane region Proteins
(MCTP); plant subset. MCTPs are involved in Ca2+
signaling at the membrane. Plant-MCTPs are composed of
a variable N-terminal sequence, four C2 domains, two
transmembrane regions (TMRs), and a short C-terminal
sequence. It is one of four protein classes that are
anchored to membranes via a transmembrane region; the
others being synaptotagmins, extended synaptotagmins,
and ferlins. MCTPs are the only membrane-bound C2 domain
proteins that contain two functional TMRs. MCTPs are
unique in that they bind Ca2+ but not phospholipids. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the third C2
repeat, C2C, and has a type-II topology.
Length = 150
Score = 39.6 bits (93), Expect = 9e-05
Identities = 26/97 (26%), Positives = 44/97 (45%), Gaps = 9/97 (9%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKV-HRKTLNPVFNETFVFKGV- 69
L VTVI+A+DL D + +VK L + T+ + NP +NE +F
Sbjct: 2 LRVTVIEAQDLVPSDKNRVPEVFVKAQLGN---QVLRTRPSQTRNGNPSWNEELMFVAAE 58
Query: 70 PYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQID 106
P+ D L+ ++ D +K + +G + L I+
Sbjct: 59 PFED----HLILSVEDRVGPNKDEPLGRAVIPLNDIE 91
>gnl|CDD|176073 cd08691, C2_NEDL1-like, C2 domain present in NEDL1 (NEDD4-like
ubiquitin protein ligase-1). NEDL1 (AKA HECW1(HECT,
C2 and WW domain containing E3 ubiquitin protein ligase
1)) is a newly identified HECT-type E3 ubiquitin
protein ligase highly expressed in favorable
neuroblastomas. In vertebrates it is found primarily in
neuronal tissues, including the spinal cord. NEDL1 is
thought to normally function in the quality control of
cellular proteins by eliminating misfolded proteins.
This is thought to be accomplished via a mechanism
analogous to that of ER-associated degradation by
forming tight complexes and aggregating misfolded
proteins that have escaped ubiquitin-mediated
degradation. NEDL1, is composed of a C2 domain, two WW
domains, and a ubiquitin ligase Hect 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 = 137
Score = 38.9 bits (91), Expect = 1e-04
Identities = 25/71 (35%), Positives = 35/71 (49%), Gaps = 12/71 (16%)
Query: 11 SLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRK----------TLNPVF 60
S S++ +QA +L M DPYVK+ + P K+ F H T+NPV+
Sbjct: 2 SFSLSGLQARNLKK-GMFFNPDPYVKISIQPGKRHIFPALPHHGQECRTSIVENTINPVW 60
Query: 61 -NETFVFKGVP 70
E FVF G+P
Sbjct: 61 HREQFVFVGLP 71
>gnl|CDD|176059 cd08677, C2A_Synaptotagmin-13, C2 domain. Synaptotagmin is a
membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Synaptotagmin 13, a member of
class 6 synaptotagmins, is located in the brain. It
functions are unknown. It, like synaptotagmins 8 and 12,
does not have any consensus Ca2+ binding sites.
Previously all synaptotagmins were thought to be calcium
sensors in the regulation of neurotransmitter release
and hormone secretion, but it has been shown that not
all of them bind calcium. Of the 17 identified
synaptotagmins only 8 bind calcium (1-3, 5-7, 9, 10).
The function of the two C2 domains that bind calcium
are: regulating the fusion step of synaptic vesicle
exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This CD contains the first C2
repeat, C2A, and has a type-I topology.
Length = 118
Score = 38.7 bits (90), Expect = 1e-04
Identities = 27/116 (23%), Positives = 59/116 (50%), Gaps = 5/116 (4%)
Query: 3 LEYDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLL-PDKKKKFETKVHRKTLNPVFN 61
L YD L V +++AE++ + + Y+ + + +K+ +T + + L+ +
Sbjct: 7 LSYDKQKAELHVNILEAENI---SVDAGCECYISGCVSVSEGQKEAQTALKKLALHTQWE 63
Query: 62 ETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWREL 117
E VF +P ++++ TL + DRFS+H +GE+++ L + + +W +L
Sbjct: 64 EELVFP-LPEEESLDGTLTLTLRCCDRFSRHSTLGELRLKLADVSMMLGAAQWVDL 118
>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 = 35.0 bits (81), Expect = 0.003
Identities = 21/74 (28%), Positives = 40/74 (54%), Gaps = 7/74 (9%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVPY 71
L V I+A L + G+S+PY V + + +K+++ + T NP ++E F+F+
Sbjct: 1 LLVKNIKANGL--SEAAGSSNPYC-VLEMDEPPQKYQSSTQKNTSNPFWDEHFLFE---- 53
Query: 72 ADAMNKTLVFAIFD 85
+K L+F ++D
Sbjct: 54 LSPNSKELLFEVYD 67
>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 = 34.9 bits (81), Expect = 0.003
Identities = 27/95 (28%), Positives = 40/95 (42%), Gaps = 8/95 (8%)
Query: 11 SLSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVFKGVP 70
L +TV A+ DPYV+V D + +T+V +KT NP +NE F P
Sbjct: 3 QLQITVESAKLKSNSKSFKP-DPYVEV--TVDGQPPKKTEVSKKTSNPKWNEHFTVLVTP 59
Query: 71 YADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQI 105
+ TL F ++ +GE + L I
Sbjct: 60 QS-----TLEFKVWSHHTLKADVLLGEASLDLSDI 89
>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 = 34.2 bits (79), Expect = 0.004
Identities = 21/55 (38%), Positives = 29/55 (52%), Gaps = 7/55 (12%)
Query: 12 LSVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVF 66
L V V++A LPA ++DP V+V L K TK +T NP +N+ F F
Sbjct: 2 LYVRVVKARGLPA----NSNDPVVEVKLGNYKGS---TKAIERTSNPEWNQVFAF 49
>gnl|CDD|175982 cd04015, C2_plant_PLD, C2 domain present in plant phospholipase D
(PLD). PLD hydrolyzes terminal phosphodiester bonds in
diester glycerophospholipids resulting in the
degradation of phospholipids. In vitro PLD transfers
phosphatidic acid to primary alcohols. In plants PLD
plays a role in germination, seedling growth,
phosphatidylinositol metabolism, and changes in
phospholipid composition. There is a single
Ca(2+)/phospholipid-binding C2 domain in PLD. C2 domains
fold into an 8-standed beta-sandwich that can adopt 2
structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 158
Score = 33.8 bits (78), Expect = 0.010
Identities = 32/137 (23%), Positives = 51/137 (37%), Gaps = 37/137 (27%)
Query: 11 SLSVTVIQAEDLPALDM------------------------------GGTSDPYVKVYLL 40
+L VT+ +A++LP +DM TSDPY V L
Sbjct: 8 TLDVTIYEADNLPNMDMFSEKLRRFFSKLVGCSEPTLKRPSSHRHVGKITSDPYATVDL- 66
Query: 41 PDKKKKFETKVHRKTLNPVFNETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKV 100
+ T+V + NPV+NE+F YA + F + D D IG +
Sbjct: 67 -AGARVARTRVIENSENPVWNESFHIYCAHYASH----VEFTVKDNDVVGA-QLIGRAYI 120
Query: 101 ALCQIDLAQTIEEWREL 117
+ + + +E W +
Sbjct: 121 PVEDLLSGEPVEGWLPI 137
>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 = 32.2 bits (74), Expect = 0.026
Identities = 30/119 (25%), Positives = 43/119 (36%), Gaps = 28/119 (23%)
Query: 11 SLSVTVIQAEDLPALD------MGGTS----DPYVKVYLLPDKKKKFETKVHRKTLNPVF 60
+L + + +A DL D + DPYV + + D +T KT +PV+
Sbjct: 5 TLKIKICEAVDLKPTDWSTRHAVPKKGSQLLDPYVSIDV--DDTHIGKTSTKPKTNSPVW 62
Query: 61 NETFVFKGVPYADAMNKTL-VF--AIFDFDRFSKHDQIGEVKVALCQIDLAQTIEEWRE 116
NE F + + N L VF A D F VA C I I+
Sbjct: 63 NEEFTTEVH---NGRNLELTVFHDAAIGPDDF----------VANCTISFEDLIQRGSG 108
>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 = 31.9 bits (72), Expect = 0.047
Identities = 26/71 (36%), Positives = 39/71 (54%), Gaps = 4/71 (5%)
Query: 1 MKLEYDFNANSLSVTVIQAEDLPA--LDMGGTSDPYVKVYLLPD--KKKKFETKVHRKTL 56
+ + Y AN L V VI+A++L + L + D VKV L K KK +TK + +
Sbjct: 6 LSISYLPAANRLLVVVIKAKNLHSDQLKLLLGIDVSVKVTLKHQNAKLKKKQTKRAKHKI 65
Query: 57 NPVFNETFVFK 67
NPV+NE +F+
Sbjct: 66 NPVWNEMIMFE 76
>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 = 31.5 bits (72), Expect = 0.047
Identities = 25/94 (26%), Positives = 41/94 (43%), Gaps = 22/94 (23%)
Query: 31 SDPYVKVYLLPDKKKKFETKVHRKTLN--PVFNETFVF--------KGVPYADA------ 74
SD YVK +L ++ K +T VH ++L+ FN FVF K +
Sbjct: 25 SDIYVKGWLDGLEEDKQKTDVHYRSLDGEGNFNWRFVFPFDYLPAEKKIVVIKKEHFWSL 84
Query: 75 ------MNKTLVFAIFDFDRFSKHDQIGEVKVAL 102
+ L ++D D+FS D +G +++ L
Sbjct: 85 DETEYKIPPKLTLQVWDNDKFSPDDFLGSLELDL 118
>gnl|CDD|182589 PRK10614, PRK10614, multidrug efflux system subunit MdtC;
Provisional.
Length = 1025
Score = 30.5 bits (69), Expect = 0.25
Identities = 15/38 (39%), Positives = 24/38 (63%)
Query: 5 YDFNANSLSVTVIQAEDLPALDMGGTSDPYVKVYLLPD 42
YDF + L+ T+ Q + + +D+GG+S P V+V L P
Sbjct: 155 YDFASTQLAQTISQIDGVGDVDVGGSSLPAVRVGLNPQ 192
>gnl|CDD|226068 COG3538, COG3538, Uncharacterized conserved protein [Function
unknown].
Length = 434
Score = 30.1 bits (68), Expect = 0.25
Identities = 16/51 (31%), Positives = 22/51 (43%), Gaps = 6/51 (11%)
Query: 70 PYADAMNKTLVFAIFDFDRFSKHDQIGEVKV---ALCQ-IDLAQTIEEWRE 116
PYA+A N+T A D + + E K +LC I LA W+
Sbjct: 102 PYANAFNETANGAGHQTDHTEMNPWVWERKYEIDSLCYPIQLAYLY--WKA 150
>gnl|CDD|175980 cd04013, C2_SynGAP_like, C2 domain present in Ras GTPase activating
protein (GAP) family. SynGAP, GAP1, RasGAP, and
neurofibromin are all members of the Ras-specific GAP
(GTPase-activating protein) family. SynGAP regulates
the MAP kinase signaling pathway and is critical for
cognition and synapse function. Mutations in this gene
causes mental retardation in humans. SynGAP contains a
PH-like domain, a C2 domain, and a Ras-GAP 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 = 146
Score = 28.4 bits (64), Expect = 0.70
Identities = 29/112 (25%), Positives = 45/112 (40%), Gaps = 21/112 (18%)
Query: 10 NSLSVTVIQAEDLPALDMGGTSDPYVKVY---LLPDKKKKFETKVHRKTLNPVFNETFVF 66
NSL + +I+A+ LP K Y L DK T KT + E F F
Sbjct: 11 NSLKLWIIEAKGLPP----------KKRYYCELCLDKTLYARTTSKLKTDTLFWGEHFEF 60
Query: 67 KGVPYADAMNKTLVFAIF-DFDRFSKHDQ---IGEVKVALCQIDLAQTIEEW 114
+P + L + + D+ K D+ IG V + + + Q +E+W
Sbjct: 61 SNLPPVSVITVNL----YRESDKKKKKDKSQLIGTVNIPVTDVSSRQFVEKW 108
>gnl|CDD|176072 cd08690, C2_Freud-1, C2 domain found in 5' repressor element
under dual repression binding protein-1 (Freud-1).
Freud-1 is a novel calcium-regulated repressor that
negatively regulates basal 5-HT1A receptor expression
in neurons. It may also play a role in the altered
regulation of 5-HT1A receptors associated with anxiety
or major depression. Freud-1 contains two DM-14 basic
repeats, a helix-loop-helix DNA binding domain, and a
C2 domain. The Freud-1 C2 domain is thought to be
calcium insensitive and it lacks several acidic
residues that mediate calcium binding of the PKC C2
domain. In addition, it contains a poly-basic insert
that is not present in calcium-dependent C2 domains and
may function as a nuclear localization signal. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind
phospholipids, inositol polyphosphates, and
intracellular proteins. Most C2 domain proteins are
either signal transduction enzymes that contain a
single C2 domain, such as protein kinase C, or membrane
trafficking proteins which contain at least two C2
domains, such as synaptotagmin 1. However, there are a
few exceptions to this including RIM isoforms and some
splice variants of piccolo/aczonin and intersectin
which only have a single C2 domain. C2 domains with a
calcium binding region have negatively charged
residues, primarily aspartates, that serve as ligands
for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-II topology.
Length = 155
Score = 28.4 bits (64), Expect = 0.71
Identities = 14/62 (22%), Positives = 30/62 (48%), Gaps = 6/62 (9%)
Query: 10 NSLSVTVIQAEDLPALDMGGTSD--PYVKVYLLP---DKKKKFETKVHRKTLNPVFNETF 64
+S+ +T+++ +P D YVK + P ++ + +T + T +P +NE+F
Sbjct: 2 SSIELTIVRCIGIPLPSGWNPKDLDTYVK-FEFPYPNEEPQSGKTSTIKDTNSPEYNESF 60
Query: 65 VF 66
Sbjct: 61 KL 62
>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 = 27.5 bits (61), Expect = 1.3
Identities = 10/21 (47%), Positives = 13/21 (61%)
Query: 45 KKFETKVHRKTLNPVFNETFV 65
KK +T+V R T P +NE F
Sbjct: 31 KKAKTRVCRDTTEPNWNEEFE 51
>gnl|CDD|146285 pfam03566, Peptidase_A21, Peptidase family A21.
Length = 628
Score = 27.6 bits (61), Expect = 2.3
Identities = 16/44 (36%), Positives = 21/44 (47%), Gaps = 4/44 (9%)
Query: 22 LPALDMGGT--SDPYVKVYLLPDKKKKFETKVHRKTLNPVFNET 63
LP L G T + P + +LL + + VH K NPVF T
Sbjct: 429 LPPLTFGQTMQNTPKTEQFLLKETGGFY--LVHSKMRNPVFEMT 470
>gnl|CDD|222706 pfam14356, DUF4403, Domain of unknown function (DUF4403). This
family of proteins is functionally uncharacterized. This
family of proteins is found in bacteria. Proteins in
this family are typically between 455 and 518 amino
acids in length. There is a single completely conserved
residue W that may be functionally important.
Length = 425
Score = 26.8 bits (60), Expect = 3.1
Identities = 16/68 (23%), Positives = 23/68 (33%), Gaps = 11/68 (16%)
Query: 60 FNETFVFKGVPYADAMNKTLVFAIFDFDRFSK-----------HDQIGEVKVALCQIDLA 108
N T G P DA +TL DFD +K H + + DL
Sbjct: 307 LNGTVYLSGRPVYDAATQTLRLEDLDFDVDTKNALAGTAAWLLHPTLRKAIAEKLVFDLG 366
Query: 109 QTIEEWRE 116
+ E ++
Sbjct: 367 PQLAEAKK 374
>gnl|CDD|180286 PRK05848, PRK05848, nicotinate-nucleotide pyrophosphorylase;
Provisional.
Length = 273
Score = 26.9 bits (60), Expect = 3.3
Identities = 14/39 (35%), Positives = 20/39 (51%), Gaps = 4/39 (10%)
Query: 65 VFKGVPYADAMNKT----LVFAIFDFDRFSKHDQIGEVK 99
VF G YA + + VF I D +RF K D + E++
Sbjct: 42 VFSGEKYALELLEMTGIECVFTIKDGERFKKGDILMEIE 80
>gnl|CDD|165319 PHA03020, PHA03020, hypothetical protein; Provisional.
Length = 352
Score = 26.9 bits (59), Expect = 3.5
Identities = 10/38 (26%), Positives = 20/38 (52%), Gaps = 6/38 (15%)
Query: 33 PYVKVYLLPDKKKK------FETKVHRKTLNPVFNETF 64
P + ++L ++ K FE+ + + NPV++ TF
Sbjct: 107 PLIYKHILNNENGKCGFDILFESGIIQINFNPVYDLTF 144
>gnl|CDD|180949 PRK07370, PRK07370, enoyl-(acyl carrier protein) reductase;
Validated.
Length = 258
Score = 26.6 bits (59), Expect = 4.4
Identities = 12/24 (50%), Positives = 15/24 (62%), Gaps = 2/24 (8%)
Query: 37 VYLLPDKKKKFETKVHRKT--LNP 58
+ LPD+K +FE KV T LNP
Sbjct: 37 ITYLPDEKGRFEKKVRELTEPLNP 60
>gnl|CDD|171782 PRK12865, PRK12865, YciI-like protein; Reviewed.
Length = 97
Score = 25.6 bits (56), Expect = 4.8
Identities = 17/49 (34%), Positives = 23/49 (46%), Gaps = 8/49 (16%)
Query: 13 SVTVIQAEDLPALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFN 61
S+ +++AE A +DPY K L FE+ V K N VFN
Sbjct: 53 SLVIVKAETKEAAKALADADPYAKAGL-------FES-VEVKAYNWVFN 93
>gnl|CDD|176066 cd08684, C2A_Tac2-N, C2 domain first repeat found in Tac2-N
(Tandem C2 protein in Nucleus). Tac2-N contains two C2
domains and a short C-terminus including a WHXL motif,
which are key in stabilizing transport vesicles to the
plasma membrane by binding to a plasma membrane.
However unlike the usual carboxyl-terminal-type
(C-type) tandem C2 proteins, it lacks a transmembrane
domain, a Slp-homology domain, and a
Munc13-1-interacting domain. Homology search analysis
indicate that no known protein motifs are located in
its N-terminus, making Tac2-N a novel class of
Ca2+-independent, C-type tandem C2 proteins. The C2
domain was first identified in PKC. C2 domains fold
into an 8-standed beta-sandwich that can adopt 2
structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind
phospholipids, inositol polyphosphates, and
intracellular proteins. Most C2 domain proteins are
either signal transduction enzymes that contain a
single C2 domain, such as protein kinase C, or membrane
trafficking proteins which contain at least two C2
domains, such as synaptotagmin 1. However, there are a
few exceptions to this including RIM isoforms and some
splice variants of piccolo/aczonin and intersectin
which only have a single C2 domain. C2 domains with a
calcium binding region have negatively charged
residues, primarily aspartates, that serve as ligands
for calcium ions.
Length = 103
Score = 25.6 bits (56), Expect = 5.2
Identities = 16/54 (29%), Positives = 25/54 (46%), Gaps = 1/54 (1%)
Query: 14 VTVIQAEDLP-ALDMGGTSDPYVKVYLLPDKKKKFETKVHRKTLNPVFNETFVF 66
+TV++ +DL G Y+K L K F++ + + F ETFVF
Sbjct: 3 ITVLKCKDLSWPSSCGENPTIYIKGILTLPKPVHFKSSAKEGSNDIEFMETFVF 56
>gnl|CDD|236050 PRK07564, PRK07564, phosphoglucomutase; Validated.
Length = 543
Score = 26.3 bits (59), Expect = 5.3
Identities = 11/26 (42%), Positives = 14/26 (53%), Gaps = 1/26 (3%)
Query: 41 PDKKKKFETKVHRKT-LNPVFNETFV 65
P + KF T HR + L P FNE +
Sbjct: 34 PFQDVKFGTSGHRGSSLQPSFNENHI 59
>gnl|CDD|225736 COG3195, COG3195, Uncharacterized protein conserved in bacteria
[Function unknown].
Length = 176
Score = 25.4 bits (56), Expect = 7.5
Identities = 14/51 (27%), Positives = 21/51 (41%), Gaps = 2/51 (3%)
Query: 55 TLNPVFNETFVFKGVPYADAMNKTLVFAIFDFDRFSKHDQIGEVKVALCQI 105
LN + E F F + K + A F+R +D+ E AL +I
Sbjct: 111 ELNAAYVERFGFPFIIAVKGNTKDTILAA--FERRLDNDREQEFATALAEI 159
>gnl|CDD|178538 PLN02952, PLN02952, phosphoinositide phospholipase C.
Length = 599
Score = 25.7 bits (56), Expect = 8.9
Identities = 13/37 (35%), Positives = 19/37 (51%), Gaps = 2/37 (5%)
Query: 32 DPYVKVYLL--PDKKKKFETKVHRKTLNPVFNETFVF 66
D Y K+Y++ P K +TK+ P +NE F F
Sbjct: 498 DFYTKMYIVGVPADNAKKKTKIIEDNWYPAWNEEFSF 534
Database: CDD.v3.10
Posted date: Mar 20, 2013 7:55 AM
Number of letters in database: 10,937,602
Number of sequences in database: 44,354
Lambda K H
0.319 0.137 0.395
Gapped
Lambda K H
0.267 0.0645 0.140
Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 44354
Number of Hits to DB: 6,516,630
Number of extensions: 566757
Number of successful extensions: 617
Number of sequences better than 10.0: 1
Number of HSP's gapped: 505
Number of HSP's successfully gapped: 108
Length of query: 128
Length of database: 10,937,602
Length adjustment: 86
Effective length of query: 42
Effective length of database: 7,123,158
Effective search space: 299172636
Effective search space used: 299172636
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.4 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.7 bits)
S2: 53 (24.4 bits)