RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy8342
(225 letters)
>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 = 160 bits (407), Expect = 1e-50
Identities = 67/115 (58%), Positives = 81/115 (70%), Gaps = 7/115 (6%)
Query: 117 IRLRIIAGHSLAKKDIFGA-----RIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFR 171
+R++++AG LAKKDIFGA +I L +G+ IDS TKT KKTLNP WNEEF FR
Sbjct: 2 LRVKVLAGIDLAKKDIFGASDPYVKISLYDPDGNGEIDSVQTKTIKKTLNPKWNEEFFFR 61
Query: 172 VKPSEHKLVFQVFDMNRLTRDDFLGMVELSLLNLPRESDG--CVIHNKKYILRPR 224
V P EH+L+F+VFD NRLTRDDFLG VE+ L NLP E+ G K Y+LRPR
Sbjct: 62 VNPREHRLLFEVFDENRLTRDDFLGQVEVPLNNLPTETPGNERRYTFKDYLLRPR 116
Score = 29.6 bits (67), Expect = 0.59
Identities = 10/16 (62%), Positives = 13/16 (81%)
Query: 1 ARSKVKGFLELYHAYL 16
++S+VKG L LY AYL
Sbjct: 118 SKSRVKGHLRLYMAYL 133
>gnl|CDD|215765 pfam00168, C2, C2 domain.
Length = 85
Score = 80.4 bits (199), Expect = 6e-20
Identities = 34/89 (38%), Positives = 49/89 (55%), Gaps = 10/89 (11%)
Query: 117 IRLRIIAGHSLAKKDIFG-----ARIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFR 171
+R+ +I+ +L KD+ G ++ L G Q D+ TK K TLNPVWNE F F
Sbjct: 1 LRVTVISAKNLPPKDLNGKSDPYVKVSL----GGQKKDTKKTKVVKNTLNPVWNETFTFE 56
Query: 172 V-KPSEHKLVFQVFDMNRLTRDDFLGMVE 199
V P +L +V+D +R +DDF+G V
Sbjct: 57 VTLPELAELRIEVYDYDRFGKDDFIGEVT 85
>gnl|CDD|214577 smart00239, C2, Protein kinase C conserved region 2 (CalB).
Ca2+-binding motif present in phospholipases, protein
kinases C, and synaptotagmins (among others). Some do
not appear to contain Ca2+-binding sites. Particular C2s
appear to bind phospholipids, inositol polyphosphates,
and intracellular proteins. Unusual occurrence in
perforin. Synaptotagmin and PLC C2s are permuted in
sequence with respect to N- and C-terminal beta strands.
SMART detects C2 domains using one or both of two
profiles.
Length = 101
Score = 75.2 bits (185), Expect = 7e-18
Identities = 35/99 (35%), Positives = 49/99 (49%), Gaps = 10/99 (10%)
Query: 116 QIRLRIIAGHSLAKKDIFG-----ARIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIF 170
+ ++II+ +L KD G ++ L + TK K TLNPVWNE F F
Sbjct: 1 TLTVKIISARNLPPKDKGGKSDPYVKVSL----DGDPKEKKKTKVVKNTLNPVWNETFEF 56
Query: 171 RVKPSEHK-LVFQVFDMNRLTRDDFLGMVELSLLNLPRE 208
V P E L +V+D +R RDDF+G V + L +L
Sbjct: 57 EVPPPELAELEIEVYDKDRFGRDDFIGQVTIPLSDLLLG 95
>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 = 71.3 bits (175), Expect = 3e-16
Identities = 36/99 (36%), Positives = 51/99 (51%), Gaps = 12/99 (12%)
Query: 117 IRLRIIAGHSLAKKDIFG-----ARIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFR 171
+R+ +I +L KD+ G ++ ++ G Q TK K TLNPVWNE F F
Sbjct: 1 LRVTVIEARNLPAKDLNGKSDPYVKV---SLGGKQK---FKTKVVKNTLNPVWNETFEFP 54
Query: 172 V-KPSEHKLVFQVFDMNRLTRDDFLGMVELSLLNLPRES 209
V P L +V+D +R ++DDFLG VE+ L L
Sbjct: 55 VLDPESDTLTVEVWDKDRFSKDDFLGEVEIPLSELLDSG 93
>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 = 63.4 bits (155), Expect = 6e-13
Identities = 26/46 (56%), Positives = 34/46 (73%), Gaps = 2/46 (4%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSEHK--LVFQVFDMNRLTRDDFLG 196
TKT KKTLNPVWNE F F +KP++ L +V+D +R TR+DF+G
Sbjct: 54 TKTIKKTLNPVWNETFTFDLKPADKDRRLSIEVWDWDRTTRNDFMG 99
>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 = 62.7 bits (153), Expect = 7e-13
Identities = 36/89 (40%), Positives = 46/89 (51%), Gaps = 14/89 (15%)
Query: 117 IRLRIIAGHSLAKKDIFG-----ARIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFR 171
+RL ++ LAK+D+F A I TV+G QT T KKTL+P WNE F
Sbjct: 2 VRLTVLCADGLAKRDLFRLPDPFAVI---TVDGGQTHS---TDVAKKTLDPKWNEHFDLT 55
Query: 172 VKPSEHKLVFQVFDMNRLTRDD--FLGMV 198
V PS + QVFD + + D FLG V
Sbjct: 56 VGPSS-IITIQVFDQKKFKKKDQGFLGCV 83
>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 = 62.3 bits (152), Expect = 1e-12
Identities = 26/54 (48%), Positives = 35/54 (64%), Gaps = 3/54 (5%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSE---HKLVFQVFDMNRLTRDDFLGMVELSLL 203
TK +KTLNPV+NE F F+V SE LVF V+D +R ++ D +G V + LL
Sbjct: 55 TKVHRKTLNPVFNETFTFKVPYSELGNKTLVFSVYDFDRFSKHDLIGEVRVPLL 108
>gnl|CDD|197736 smart00456, WW, Domain with 2 conserved Trp (W) residues. Also
known as the WWP or rsp5 domain. Binds proline-rich
polypeptides.
Length = 33
Score = 57.6 bits (140), Expect = 8e-12
Identities = 20/31 (64%), Positives = 23/31 (74%)
Query: 68 LPPGWEERTDANGRTYYVNHIARCTQWERPT 98
LPPGWEER D +GR YY NH + TQWE+P
Sbjct: 2 LPPGWEERKDPDGRPYYYNHETKETQWEKPR 32
>gnl|CDD|238122 cd00201, WW, Two conserved tryptophans domain; also known as the
WWP or rsp5 domain; around 40 amino acids; functions as
an interaction module in a diverse set of signalling
proteins; binds specific proline-rich sequences but at
low affinities compared to other peptide recognition
proteins such as antibodies and receptors; WW domains
have a single groove formed by a conserved Trp and Tyr
which recognizes a pair of residues of the sequence
X-Pro; variable loops and neighboring domains confer
specificity in this domain; there are five distinct
groups based on binding: 1) PPXY motifs 2) the PPLP
motif; 3) PGM motifs; 4) PSP or PTP motifs; 5) PR
motifs.
Length = 31
Score = 56.8 bits (138), Expect = 2e-11
Identities = 19/30 (63%), Positives = 21/30 (70%)
Query: 69 PPGWEERTDANGRTYYVNHIARCTQWERPT 98
PPGWEER D +GR YY NH + TQWE P
Sbjct: 1 PPGWEERWDPDGRVYYYNHNTKETQWEDPR 30
>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 = 59.3 bits (144), Expect = 2e-11
Identities = 31/91 (34%), Positives = 48/91 (52%), Gaps = 7/91 (7%)
Query: 117 IRLRIIAGHSLAKKDIFGARIDLNTV--NGDQTIDSALTKTRKKTLNPVWNEEFIFRVKP 174
+++R++ G +LA +D + D V G+Q + T+ KK LNPVWNEE V
Sbjct: 4 LKVRVVRGTNLAVRDFTSS--DPYVVLTLGNQKVK---TRVIKKNLNPVWNEELTLSVPN 58
Query: 175 SEHKLVFQVFDMNRLTRDDFLGMVELSLLNL 205
L +VFD + ++DD +G E+ L L
Sbjct: 59 PMAPLKLEVFDKDTFSKDDSMGEAEIDLEPL 89
>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 = 59.0 bits (143), Expect = 2e-11
Identities = 37/120 (30%), Positives = 62/120 (51%), Gaps = 11/120 (9%)
Query: 113 PTE-QIRLRIIAGHSLAKKDIFGAR---IDLNTVNGDQTIDSALTKTRKKTLNPVWNEEF 168
PT +I + II +L DI G + + + D+ ++ T +K+TLNPV+NE F
Sbjct: 12 PTANRITVNIIKARNLKAMDINGTSDPYVKVWLMYKDKRVEKKKTVIKKRTLNPVFNESF 71
Query: 169 IFRV---KPSEHKLVFQVFDMNRLTRDDFLGMVELSLLNLPRESDGCVIHNKKYILRPRR 225
IF + + E L+ V D +RL+R+D +G + L + E + H K + +PR+
Sbjct: 72 IFNIPLERLRETTLIITVMDKDRLSRNDLIGKIYLGWKSGGLE----LKHWKDMLSKPRQ 127
>gnl|CDD|215899 pfam00397, WW, WW domain. The WW domain is a protein module with
two highly conserved tryptophans that binds
proline-rich peptide motifs in vitro.
Length = 30
Score = 56.0 bits (136), Expect = 3e-11
Identities = 22/30 (73%), Positives = 23/30 (76%)
Query: 68 LPPGWEERTDANGRTYYVNHIARCTQWERP 97
LPPGWEERTD +GR YY NH TQWERP
Sbjct: 1 LPPGWEERTDTDGRPYYYNHNTGETQWERP 30
>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 = 56.8 bits (138), Expect = 1e-10
Identities = 26/52 (50%), Positives = 31/52 (59%), Gaps = 3/52 (5%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSEH--KLVFQVFDMNRLTRDDFLGMVELSL 202
TKT KKTLNPVWNE F V PS L +V+D +R +DD LG + L
Sbjct: 36 TKTIKKTLNPVWNESFEVPV-PSRVRAVLKVEVYDWDRGGKDDLLGSAYIDL 86
>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 = 55.6 bits (134), Expect = 3e-10
Identities = 32/83 (38%), Positives = 44/83 (53%), Gaps = 1/83 (1%)
Query: 119 LRIIAGHSLAKKDIFGARIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVKPSEHK 178
+RI+ G +L KDI G+ V D + T T KTLNP W EE+ + P H
Sbjct: 4 IRIVEGKNLPAKDITGSSDPYCIVKVDNEV-IIRTATVWKTLNPFWGEEYTVHLPPGFHT 62
Query: 179 LVFQVFDMNRLTRDDFLGMVELS 201
+ F V D + L+RDD +G V L+
Sbjct: 63 VSFYVLDEDTLSRDDVIGKVSLT 85
>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 = 55.3 bits (134), Expect = 5e-10
Identities = 23/70 (32%), Positives = 34/70 (48%), Gaps = 5/70 (7%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSEHK-----LVFQVFDMNRLTRDDFLGMVELSLLNLPR 207
T+ +KKTL P+++E F F V P + L+F V D + L +DF G L L ++P
Sbjct: 59 TQVKKKTLFPLFDESFEFNVPPEQCSVEGALLLFTVKDYDLLGSNDFEGEAFLPLNDIPG 118
Query: 208 ESDGCVIHNK 217
D
Sbjct: 119 VEDTSSAQGF 128
>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 = 55.0 bits (133), Expect = 6e-10
Identities = 29/97 (29%), Positives = 44/97 (45%), Gaps = 15/97 (15%)
Query: 116 QIRLRIIAGHSLAKKDIFGA-------RIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEF 168
Q+ + + G +LA +D G + TV +TI K LNPVW+E+F
Sbjct: 1 QLDIHLKEGRNLAARDRGGTSDPYVKFKYGGKTVYKSKTI--------YKNLNPVWDEKF 52
Query: 169 IFRVKPSEHKLVFQVFDMNRLTRDDFLGMVELSLLNL 205
++ L +VFD +R DDF+G + L L
Sbjct: 53 TLPIEDVTQPLYIKVFDYDRGLTDDFMGSAFVDLSTL 89
>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 = 54.6 bits (132), Expect = 7e-10
Identities = 24/54 (44%), Positives = 31/54 (57%), Gaps = 4/54 (7%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSE----HKLVFQVFDMNRLTRDDFLGMVELSL 202
TK ++K LNP WNE F+F P E L QV D +R +R+D +G V L L
Sbjct: 55 TKVKRKNLNPHWNETFLFEGFPYEKLQQRVLYLQVLDYDRFSRNDPIGEVSLPL 108
>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 = 54.3 bits (131), Expect = 1e-09
Identities = 35/129 (27%), Positives = 54/129 (41%), Gaps = 29/129 (22%)
Query: 117 IRLRIIAGHSLAKK-----DIFGARIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFR 171
+ +R++ LA K D F AR+ T+N D+ TK +KKT NP ++E F F
Sbjct: 1 LSVRVLECRDLALKSNGTCDPF-ARV---TLNYSSKTDTKRTKVKKKTNNPRFDEAFYFE 56
Query: 172 VKPSEHK----------------LVFQVFDMNRLTRDDFLGMVELSLLNLPRESDGCVIH 215
+ L +++ + ++ DDFLG V + L L H
Sbjct: 57 LTIGFSYEKKSFKVEEEDLEKSELRVELWHASMVSGDDFLGEVRIPLQGL----QQAGSH 112
Query: 216 NKKYILRPR 224
Y L+PR
Sbjct: 113 QAWYFLQPR 121
>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 = 52.2 bits (126), Expect = 7e-09
Identities = 31/119 (26%), Positives = 56/119 (47%), Gaps = 12/119 (10%)
Query: 114 TEQIRLRIIAGHSLAKKDIFGA---RIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIF 170
E++ + ++ +L D G + ++ + G + + T +K TLNPV+NE F F
Sbjct: 13 AERLTVVVLKARNLPPSDGKGLSDPYVKVSLLQGGKKLKKKKTSVKKGTLNPVFNEAFSF 72
Query: 171 RVKPSEH----KLVFQVFDMNRLTRDDFLGMVELSLLNLPRESDGCVIHNKKYILRPRR 225
V P+E LV V D + + R++ +G V L + E + H + + PR+
Sbjct: 73 DV-PAEQLEEVSLVITVVDKDSVGRNEVIGQVVLGPDSGGEELE----HWNEMLASPRK 126
>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 = 51.9 bits (125), Expect = 7e-09
Identities = 38/97 (39%), Positives = 49/97 (50%), Gaps = 8/97 (8%)
Query: 118 RLRIIAGHSLAKKDIFGARIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVKPSE- 176
RLRI+ +L K G R TV+ DQ ++ A TKT +K LNP W EEF+F P +
Sbjct: 3 RLRILEAKNLPSK---GTRDPYCTVSLDQ-VEVARTKTVEK-LNPFWGEEFVFDDPPPDV 57
Query: 177 --HKLVFQVFDMNRLTRDDFLGMVELSLLNLPRESDG 211
L F D RD +G V LS L+L + D
Sbjct: 58 TFFTLSFYNKDKRSKDRDIVIGKVALSKLDLGQGKDE 94
>gnl|CDD|176037 cd08391, C2A_C2C_Synaptotagmin_like, C2 domain first and third
repeat in Synaptotagmin-like proteins. Synaptotagmin is
a membrane-trafficking protein characterized by a
N-terminal transmembrane region, a linker, and 2
C-terminal C2 domains. Previously all synaptotagmins
were thought to be calcium sensors in the regulation of
neurotransmitter release and hormone secretion, but it
has been shown that not all of them bind calcium. Of
the 17 identified synaptotagmins only 8 bind calcium
(1-3, 5-7, 9, 10). The function of the two C2 domains
that bind calcium are: regulating the fusion step of
synaptic vesicle exocytosis (C2A) and binding to
phosphatidyl-inositol-3,4,5-triphosphate (PIP3) in the
absence of calcium ions and to phosphatidylinositol
bisphosphate (PIP2) in their presence (C2B). C2B also
regulates also the recycling step of synaptic vesicles.
C2 domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains either the
first or third repeat in Synaptotagmin-like proteins
with a type-I topology.
Length = 121
Score = 51.5 bits (124), Expect = 9e-09
Identities = 27/94 (28%), Positives = 42/94 (44%), Gaps = 12/94 (12%)
Query: 117 IRLRIIAGHSLAKKDIFGARIDLNTVN-------GDQTIDSALTKTRKKTLNPVWNEEFI 169
+R+ +I L KD F + + G QT +K K+ LNP WNE +
Sbjct: 3 LRIHVIEAQDLVAKDKFVGGLVKGKSDPYVIVRVGAQTFK---SKVIKENLNPKWNEVYE 59
Query: 170 FRVKPSE-HKLVFQVFDMNRLTRDDFLGMVELSL 202
V +L ++FD + +DDFLG + + L
Sbjct: 60 AVVDEVPGQELEIELFDEDP-DKDDFLGRLSIDL 92
>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 = 51.4 bits (124), Expect = 1e-08
Identities = 23/83 (27%), Positives = 35/83 (42%), Gaps = 5/83 (6%)
Query: 117 IRLRIIAGHSLAKKDIFGARID--LNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVK- 173
+R+ ++ +L KD G + D L G + I+ TLNPV+ + F
Sbjct: 2 VRVYVVRARNLQPKDPNG-KSDPYLKIKLGKKKINDR-DNYIPNTLNPVFGKMFELEATL 59
Query: 174 PSEHKLVFQVFDMNRLTRDDFLG 196
P L V D + L DD +G
Sbjct: 60 PGNSILKISVMDYDLLGSDDLIG 82
>gnl|CDD|176011 cd04046, C2_Calpain, C2 domain present in Calpain proteins. A
single C2 domain is found in calpains (EC 3.4.22.52, EC
3.4.22.53), calcium-dependent, non-lysosomal cysteine
proteases. Caplains are classified as belonging to Clan
CA by MEROPS and include six families: C1, C2, C10, C12,
C28, and C47. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 126
Score = 51.5 bits (124), Expect = 1e-08
Identities = 18/53 (33%), Positives = 29/53 (54%), Gaps = 1/53 (1%)
Query: 149 DSALTKTRKKTLNPVWNEEFIFRVKPSEHKLVFQVFDMNRLTRDDFLGMVELS 201
+S + +K TL+P ++ + IF K + QV++ N L D+FLG LS
Sbjct: 35 ESVRSPVQKDTLSPEFDTQAIFYRKKPRSPIKIQVWNSNLL-CDEFLGQATLS 86
>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 = 51.6 bits (124), Expect = 1e-08
Identities = 19/53 (35%), Positives = 33/53 (62%), Gaps = 3/53 (5%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSE---HKLVFQVFDMNRLTRDDFLGMVELSL 202
T+ +KKTLNP +NEEF + +K S+ L V+D + +D++G ++L +
Sbjct: 54 TQVKKKTLNPEFNEEFFYDIKHSDLAKKTLEITVWDKDIGKSNDYIGGLQLGI 106
>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 = 50.7 bits (121), Expect = 3e-08
Identities = 24/84 (28%), Positives = 41/84 (48%), Gaps = 6/84 (7%)
Query: 121 IIAGHSLAKKDIFGAR---IDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVKPSE- 176
II L + D+ + + V+G + I + T + T++P +NE F F+V E
Sbjct: 20 IIRAKQLLQTDMSQGSDPFVKIQLVHGLKLIKTKKTSCMRGTIDPFYNESFSFKVPQEEL 79
Query: 177 --HKLVFQVFDMNRLTRDDFLGMV 198
LVF V+ N + +DF+G +
Sbjct: 80 ENVSLVFTVYGHNVKSSNDFIGRI 103
>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 = 49.9 bits (120), Expect = 3e-08
Identities = 21/65 (32%), Positives = 33/65 (50%), Gaps = 1/65 (1%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSE-HKLVFQVFDMNRLTRDDFLGMVELSLLNLPRESDG 211
+K KTLNP W E+F + + L +V+D + +D+F+G E+ L LPRE
Sbjct: 36 SKVCSKTLNPQWLEQFDLHLFDDQSQILEIEVWDKDTGKKDEFIGRCEIDLSALPREQTH 95
Query: 212 CVIHN 216
+
Sbjct: 96 SLELE 100
>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 = 50.0 bits (120), Expect = 4e-08
Identities = 22/59 (37%), Positives = 30/59 (50%), Gaps = 1/59 (1%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSEHKLVFQVFDMNRLTRDDFLGMVELSLLNLPRESDG 211
T+ KKT NP WNE F V P L F+V+ + L D LG L L ++ + +G
Sbjct: 38 TEVSKKTSNPKWNEHFTVLVTPQST-LEFKVWSHHTLKADVLLGEASLDLSDILKNHNG 95
>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 = 48.8 bits (117), Expect = 7e-08
Identities = 20/59 (33%), Positives = 32/59 (54%), Gaps = 2/59 (3%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSE--HKLVFQVFDMNRLTRDDFLGMVELSLLNLPRES 209
T R+ TLNPV+NE F V P E + F+V D ++ + +D++ LS+ L +
Sbjct: 41 TSWRRHTLNPVFNERLAFEVYPHEKNFDIQFKVLDKDKFSFNDYVATGSLSVQELLNAA 99
>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 = 49.0 bits (117), Expect = 1e-07
Identities = 26/85 (30%), Positives = 43/85 (50%), Gaps = 9/85 (10%)
Query: 141 TVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVKPSEHKLVFQVFDMNRLTRDDFLGMVEL 200
TVN DQ + TKT +K+L P + E+F F + + L F ++D + L RD +G V +
Sbjct: 27 TVNLDQE-EVFRTKTVEKSLCPFFGEDFYFEIPRTFRHLSFYIYDRDVLRRDSVIGKVAI 85
Query: 201 SLLNLPRESDGCVIHNKK--YILRP 223
++ D + K + L+P
Sbjct: 86 ------KKEDLHKYYGKDTWFPLQP 104
>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 = 49.6 bits (119), Expect = 1e-07
Identities = 23/55 (41%), Positives = 33/55 (60%), Gaps = 6/55 (10%)
Query: 154 KTR--KKTLNPVWNEEFIFR-VKPSEHK---LVFQVFDMNRLTRDDFLGMVELSL 202
KT KK++NPVWN F++ V P + L V+D ++L+ +DFLG V L L
Sbjct: 67 KTPVVKKSVNPVWNHTFVYDGVSPEDLSQACLELTVWDHDKLSSNDFLGGVRLGL 121
>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 = 48.4 bits (116), Expect = 1e-07
Identities = 23/54 (42%), Positives = 31/54 (57%), Gaps = 4/54 (7%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSEHK----LVFQVFDMNRLTRDDFLGMVELSL 202
T+ +K LNPVW E + V P E K L +++D +R T DD LG VE+ L
Sbjct: 41 TRIIRKDLNPVWEETWFVLVTPDEVKAGERLSCRLWDSDRFTADDRLGRVEIDL 94
>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 = 49.3 bits (118), Expect = 1e-07
Identities = 24/57 (42%), Positives = 35/57 (61%), Gaps = 5/57 (8%)
Query: 151 ALTKTRKKTLNPVWNEEFIFRVKP-SEHKLVFQVFDMNRLTRDDFLGMVELSLLNLP 206
+T+ + +TLNPVWNE F F V+ S +L ++D + DDFLG V + L +LP
Sbjct: 91 KVTEVKPQTLNPVWNETFRFEVEDVSNDQLHLDIWDHD----DDFLGCVNIPLKDLP 143
>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 = 48.4 bits (116), Expect = 1e-07
Identities = 19/53 (35%), Positives = 28/53 (52%), Gaps = 3/53 (5%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSE---HKLVFQVFDMNRLTRDDFLGMVELSL 202
T +K T NPV+NE + + S+ L V+ +R R+ FLG VE+ L
Sbjct: 56 TSVKKNTTNPVFNETLKYHISKSQLETRTLQLSVWHHDRFGRNTFLGEVEIPL 108
>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 = 48.2 bits (115), Expect = 1e-07
Identities = 23/56 (41%), Positives = 36/56 (64%), Gaps = 3/56 (5%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSE-HKLVFQV--FDMNRLTRDDFLGMVELSLLNL 205
+K KKTLNP ++E F+F V P E K +V +D ++ +RD+ +G+VEL L +
Sbjct: 55 SKIHKKTLNPEFDESFVFEVPPQELPKRTLEVLLYDFDQFSRDECIGVVELPLAEV 110
>gnl|CDD|175989 cd04022, C2A_MCTP_PRT_plant, C2 domain first repeat found in
Multiple C2 domain and Transmembrane region Proteins
(MCTP); plant subset. MCTPs are involved in Ca2+
signaling at the membrane. Plant-MCTPs are composed of
a variable N-terminal sequence, four C2 domains, two
transmembrane regions (TMRs), and a short C-terminal
sequence. It is one of four protein classes that are
anchored to membranes via a transmembrane region; the
others being synaptotagmins, extended synaptotagmins,
and ferlins. MCTPs are the only membrane-bound C2 domain
proteins that contain two functional TMRs. MCTPs are
unique in that they bind Ca2+ but not phospholipids. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the first C2
repeat, C2A, and has a type-II topology.
Length = 127
Score = 47.7 bits (114), Expect = 2e-07
Identities = 25/68 (36%), Positives = 34/68 (50%), Gaps = 5/68 (7%)
Query: 153 TKTRKKTLNPVWNEEFIFRV-KPSEHK---LVFQVFDMNRLTR-DDFLGMVELSLLNLPR 207
T+T+ K LNPVWNE+ +F V PS L V++ R R FLG V +S +
Sbjct: 36 TRTKPKDLNPVWNEKLVFNVSDPSRLSNLVLEVYVYNDRRSGRRRSFLGRVRISGTSFVP 95
Query: 208 ESDGCVIH 215
S+ V
Sbjct: 96 PSEAVVQR 103
>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 = 47.7 bits (114), Expect = 2e-07
Identities = 17/46 (36%), Positives = 30/46 (65%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSEHKLVFQVFDMNRLTRDDFLGMV 198
+ T+K T NP W+E F+F + P+ +L+F+V+D + + FLG+
Sbjct: 35 SSTQKNTSNPFWDEHFLFELSPNSKELLFEVYDNGKKSDSKFLGLA 80
>gnl|CDD|175978 cd04011, C2B_Ferlin, C2 domain second repeat in Ferlin. Ferlins
are involved in vesicle fusion events. Ferlins and
other proteins, such as Synaptotagmins, are implicated
in facilitating the fusion process when cell membranes
fuse together. There are six known human Ferlins:
Dysferlin (Fer1L1), Otoferlin (Fer1L2), Myoferlin
(Fer1L3), Fer1L4, Fer1L5, and Fer1L6. Defects in these
genes can lead to a wide range of diseases including
muscular dystrophy (dysferlin), deafness (otoferlin),
and infertility (fer-1, fertilization factor-1).
Structurally they have 6 tandem C2 domains, designated
as (C2A-C2F) and a single C-terminal transmembrane
domain, though there is a new study that disputes this
and claims that there are actually 7 tandem C2 domains
with another C2 domain inserted between C2D and C2E.
In a subset of them (Dysferlin, Myoferlin, and Fer1)
there is an additional conserved domain called DysF. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 111
Score = 47.2 bits (113), Expect = 3e-07
Identities = 29/114 (25%), Positives = 45/114 (39%), Gaps = 17/114 (14%)
Query: 116 QIRLRIIAGHSLAKKDIFGARID-LNTVN-GDQTIDSALTKTRKKTLNPVWNEEFIFRVK 173
Q+R+R+I L G ID + V G Q T +K T P +NE F F
Sbjct: 5 QVRVRVIEARQLV-----GGNIDPVVKVEVGGQKKY---TSVKKGTNCPFYNEYFFFNFH 56
Query: 174 PSEH-----KLVFQVFDMNRLTRDDFLGMVELSLLNLPRESDGCVIHNKKYILR 222
S + V+D L D +G +L + + + D + K++L
Sbjct: 57 ESPDELFDKIIKISVYDSRSLRSDTLIGSFKLDVGTVYDQPDHAFLR--KWLLL 108
>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 = 47.5 bits (114), Expect = 3e-07
Identities = 19/50 (38%), Positives = 23/50 (46%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSEHKLVFQVFDMNRLTRDDFLGMVELSL 202
TK +K T NPVWNE V L V+D N +D +G E L
Sbjct: 41 TKVKKDTSNPVWNETKYILVNSLTEPLNLTVYDFNDKRKDKLIGTAEFDL 90
>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 = 47.4 bits (113), Expect = 3e-07
Identities = 20/60 (33%), Positives = 27/60 (45%), Gaps = 6/60 (10%)
Query: 152 LTKTRKKTLNPVWNEEFIFRV------KPSEHKLVFQVFDMNRLTRDDFLGMVELSLLNL 205
T ++KT +PVW EE F + + L V N L D FLG V + L +L
Sbjct: 34 STSVKEKTTSPVWKEECSFELPGLLSGNGNRATLQLTVMHRNLLGLDKFLGQVSIPLNDL 93
>gnl|CDD|227371 COG5038, COG5038, Ca2+-dependent lipid-binding protein, contains C2
domain [General function prediction only].
Length = 1227
Score = 49.8 bits (119), Expect = 4e-07
Identities = 25/60 (41%), Positives = 30/60 (50%), Gaps = 3/60 (5%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSEHK--LVFQVFDMNRLTRDDFLGMVELSLLNLPRESD 210
TK KKTLNPVWNEEF V + K L V D + ++D LG E+ L L
Sbjct: 1077 TKVVKKTLNPVWNEEFTIEV-LNRVKDVLTINVNDWDSGEKNDLLGTAEIDLSKLEPGGT 1135
Score = 42.1 bits (99), Expect = 2e-04
Identities = 27/107 (25%), Positives = 41/107 (38%), Gaps = 4/107 (3%)
Query: 117 IRLRIIAGHSLAKKDIF-GARIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVKPS 175
+ ++I + L K D +D T+ +K TLNPVWNE F +
Sbjct: 438 VEVKIKSAEGLKKSDSTINGTVDPYITVTFSDRVIGKTRVKKNTLNPVWNETFYILLNSF 497
Query: 176 EHKLVFQVFDMNRLTRDDFLGMVELSLLNLPRESDGCVIHNKKYILR 222
L ++D N D +G +L L L + V N+ Y
Sbjct: 498 TDPLNLSLYDFNSFKSDKVVGSTQLDLALLHQNP---VKKNELYEFL 541
Score = 27.0 bits (60), Expect = 9.7
Identities = 24/106 (22%), Positives = 43/106 (40%), Gaps = 11/106 (10%)
Query: 112 EPTEQIRLRIIAGHSLAKKDIFG-----ARIDLNTVNGDQTIDSALTKTRKKTLNPVWNE 166
P IR+ + + L + G A + +N + +TI + TLNP+WNE
Sbjct: 708 TPIGAIRVSVRKANDLRNEIPGGKSDPYATVLVNNLVKYRTIYGS------STLNPIWNE 761
Query: 167 EFIFRVKPSEHKLVFQVFDMNRLTRDDFLGMVELSLLNLPRESDGC 212
V +L + D D LG V +++ N+ ++ +
Sbjct: 762 ILYVPVTSKNQRLTLECMDYEESGDDRNLGEVNINVSNVSKKDEDS 807
>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 = 46.5 bits (111), Expect = 5e-07
Identities = 21/53 (39%), Positives = 31/53 (58%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSEHKLVFQVFDMNRLTRDDFLGMVELSLLNL 205
T T KTLNP WN+ F F +K L V+D ++ + +FLG V + LL++
Sbjct: 37 THTIYKTLNPEWNKIFTFPIKDIHDVLEVTVYDEDKDKKPEFLGKVAIPLLSI 89
>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 = 46.7 bits (111), Expect = 5e-07
Identities = 28/91 (30%), Positives = 43/91 (47%), Gaps = 5/91 (5%)
Query: 117 IRLRIIAGHSLAKKDIFGARIDLNTVN-GDQTIDSALTKTRKKTLNPVWNEEFIFRVKPS 175
+R ++ LA KD G V QT++ T KK+ P WNE F F +
Sbjct: 2 LRCHVLEARDLAPKDRNGTSDPFVRVFYNGQTLE---TSVVKKSCYPRWNEVFEFELMEG 58
Query: 176 E-HKLVFQVFDMNRLTRDDFLGMVELSLLNL 205
L +V+D + ++++DFLG V S+ L
Sbjct: 59 ADSPLSVEVWDWDLVSKNDFLGKVVFSIQTL 89
>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 = 46.1 bits (110), Expect = 8e-07
Identities = 19/57 (33%), Positives = 26/57 (45%), Gaps = 5/57 (8%)
Query: 153 TKTRKKTLNPVWNEEFIFR-VKPSE---HKLVFQVFDMNRLTRDDFLGMVELSLLNL 205
TKT KT NP +NE + + + L V D +R +DFLG + L L
Sbjct: 56 TKTVHKTRNPEFNETLTYYGITEEDIQRKTLRLLVLDEDRF-GNDFLGETRIPLKKL 111
>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 = 46.3 bits (110), Expect = 1e-06
Identities = 22/53 (41%), Positives = 31/53 (58%), Gaps = 3/53 (5%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSE---HKLVFQVFDMNRLTRDDFLGMVELSL 202
T +KKTLNPV+NE ++V+ E L V+ + L R+ FLG VE+ L
Sbjct: 57 TSVKKKTLNPVFNETLRYKVEREELPTRVLNLSVWHRDSLGRNSFLGEVEVDL 109
>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 = 45.7 bits (109), Expect = 1e-06
Identities = 22/57 (38%), Positives = 31/57 (54%), Gaps = 2/57 (3%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPS-EHKLVFQVFDMNRLTRDDFLGMVELSLLNLPRE 208
TKT K ++NPVWNE F FR++ ++ L V D + + DD LG V + L
Sbjct: 39 TKTIKNSINPVWNETFEFRIQSQVKNVLELTVMDEDYV-MDDHLGTVLFDVSKLKLG 94
>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 = 45.9 bits (109), Expect = 1e-06
Identities = 28/82 (34%), Positives = 44/82 (53%), Gaps = 8/82 (9%)
Query: 127 LAKKDIFGAR---IDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVKPSEH----KL 179
L K D+ G + +N G + I T +K TLNPV+NE F+F + PSE +
Sbjct: 27 LPKMDVSGLADPYVKVNLYYGKKRISKKKTHVKKCTLNPVFNESFVFDI-PSEELEDISV 85
Query: 180 VFQVFDMNRLTRDDFLGMVELS 201
F V D +R+T+++ +G + L
Sbjct: 86 EFLVLDSDRVTKNEVIGRLVLG 107
>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 = 45.1 bits (107), Expect = 3e-06
Identities = 25/77 (32%), Positives = 37/77 (48%), Gaps = 9/77 (11%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSEH----KLVFQVFDMNRLTRDDFLGMVELSLLNLPRE 208
T +K+TLNP +NE F F V P E L+ V D +R+ ++D +G V L
Sbjct: 56 TTIKKRTLNPYYNESFSFEV-PFEQIQKVHLIVTVLDYDRIGKNDPIGKVVLG----CNA 110
Query: 209 SDGCVIHNKKYILRPRR 225
+ + H + PRR
Sbjct: 111 TGAELRHWSDMLASPRR 127
>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 = 44.5 bits (106), Expect = 3e-06
Identities = 23/54 (42%), Positives = 29/54 (53%), Gaps = 4/54 (7%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSE----HKLVFQVFDMNRLTRDDFLGMVELSL 202
TKT KKTLNP WN+ F + E L V+D +R +DFLG V + L
Sbjct: 57 TKTVKKTLNPEWNQTFEYSNVRRETLKERTLEVTVWDYDRDGENDFLGEVVIDL 110
>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 = 43.8 bits (104), Expect = 6e-06
Identities = 19/56 (33%), Positives = 32/56 (57%), Gaps = 3/56 (5%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSE---HKLVFQVFDMNRLTRDDFLGMVELSLLNL 205
+K ++KT NP ++E F+F+V E L V+D++R +R +G V L +L
Sbjct: 54 SKVKRKTQNPNFDETFVFQVSFKELQRRTLRLSVYDVDRFSRHCIIGHVLFPLKDL 109
>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 = 43.3 bits (103), Expect = 1e-05
Identities = 34/98 (34%), Positives = 46/98 (46%), Gaps = 11/98 (11%)
Query: 117 IRLRIIAGHSLAKKDIFGARIDLNT-----VNGDQTIDSALTKTR---KKTLNPVWNEEF 168
+ ++II+G L K I ++ ++G DSA KT+ NPVWNE F
Sbjct: 4 LTIKIISGQQLPKPKGDKGSI-VDPYVEVEIHGLPADDSAKFKTKVVKNNGFNPVWNETF 62
Query: 169 IFRVK-PSEHKLVFQVFDMNRLTRDDFLGMVELSLLNL 205
F V P L F V+D + DDFLG L L +L
Sbjct: 63 EFDVTVPELAFLRFVVYDEDS-GDDDFLGQACLPLDSL 99
>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 = 43.3 bits (102), Expect = 1e-05
Identities = 33/106 (31%), Positives = 47/106 (44%), Gaps = 13/106 (12%)
Query: 116 QIRLRIIAGHSLAKKDIFGARIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVKPS 175
+I + ++ L KD G TV +T TKT + LNPVWNE+F F S
Sbjct: 2 KISITVVCAQGLIAKDKTGTSDPYVTVQVGKT--KKRTKTIPQNLNPVWNEKFHFECHNS 59
Query: 176 EHKLVFQVFD---------MNRLTR--DDFLGMVELSLLNLPRESD 210
++ +V+D + TR DDFLG + + L E D
Sbjct: 60 SDRIKVRVWDEDDDIKSRLKQKFTRESDDFLGQTIIEVRTLSGEMD 105
>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 = 42.3 bits (100), Expect = 2e-05
Identities = 18/54 (33%), Positives = 28/54 (51%), Gaps = 10/54 (18%)
Query: 153 TKTRKKTL------NPVWNEEFIFRVKPSE----HKLVFQVFDMNRLTRDDFLG 196
T+ RK + NP WNE+F F V+ KL+ ++ D + + DDF+G
Sbjct: 32 TQERKSKVAKGDGRNPEWNEKFKFTVEYPGWGGDTKLILRIMDKDNFSDDDFIG 85
>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 = 42.8 bits (101), Expect = 2e-05
Identities = 19/63 (30%), Positives = 36/63 (57%), Gaps = 1/63 (1%)
Query: 144 GDQTIDSALTKTRKKTLNPVWNEEFIFRVKPSEHKLVFQVF-DMNRLTRDDFLGMVELSL 202
G + I TK +KTL+P++ ++ +F V P+ L V+ D R+ + F+G+ ++ L
Sbjct: 62 GKKCIAKKKTKIARKTLDPLYQQQLVFDVSPTGKTLQVIVWGDYGRMDKKVFMGVAQILL 121
Query: 203 LNL 205
+L
Sbjct: 122 DDL 124
>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 = 42.4 bits (100), Expect = 2e-05
Identities = 25/92 (27%), Positives = 44/92 (47%), Gaps = 11/92 (11%)
Query: 117 IRLRIIAGHSLAKKDIFGA-----RIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFR 171
+R+ ++ LA KD G L+ G Q T+T TLNP WN F
Sbjct: 3 LRVHVVEAKDLAAKDRSGKGKSDPYAILSV--GAQRFK---TQTIPNTLNPKWNYWCEFP 57
Query: 172 VKPSEHKLV-FQVFDMNRLTRDDFLGMVELSL 202
+ ++++L+ ++D +R D+LG +++L
Sbjct: 58 IFSAQNQLLKLILWDKDRFAGKDYLGEFDIAL 89
>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 = 41.8 bits (99), Expect = 4e-05
Identities = 16/52 (30%), Positives = 27/52 (51%), Gaps = 2/52 (3%)
Query: 153 TKTRKKTLNPVWNEEFIFRVK-PSE-HKLVFQVFDMNRLTRDDFLGMVELSL 202
T +K + NP WNE+ +F P ++ Q+ D +R+ DD +G + L
Sbjct: 50 TSVKKNSYNPEWNEQIVFPEMFPPLCERIKIQIRDWDRVGNDDVIGTHFIDL 101
>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 = 41.4 bits (98), Expect = 4e-05
Identities = 25/98 (25%), Positives = 40/98 (40%), Gaps = 11/98 (11%)
Query: 115 EQIRLRIIAGHSLAKKDIFG-----ARIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFI 169
++ L I + +L KD+ + + T Q ++ T+ K LNP + F
Sbjct: 1 PKVELSI-SCRNLLDKDVLSKSDPFVVVYVKTGGSGQWVEIGRTEVIKNNLNPDFVTTFT 59
Query: 170 FRVK-PSEHKLVFQVFD----MNRLTRDDFLGMVELSL 202
KL F+V+D L+ DFLG E +L
Sbjct: 60 VDYYFEEVQKLRFEVYDVDSKSKDLSDHDFLGEAECTL 97
>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 = 41.6 bits (98), Expect = 6e-05
Identities = 37/130 (28%), Positives = 53/130 (40%), Gaps = 28/130 (21%)
Query: 116 QIRLRIIAGHSLAKK----DIFGARIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFR 171
++ +R+I LA K D + A + L N Q D+ TK +KKT NP ++E F F
Sbjct: 1 KLSVRVIECSDLALKNGTCDPY-ASVTLIYSNKKQ--DTKRTKVKKKTNNPQFDEAFYFD 57
Query: 172 VKPSEHKLVFQVFDM-----------------NRLTRDDFLGMVELSLLNLPRESDGCVI 214
V Q F+M + D FLG V + L L ++
Sbjct: 58 VTIDSSPEKKQ-FEMPEEDAEKLELRVDLWHASMGGGDVFLGEVRIPLRGLDLQA---GS 113
Query: 215 HNKKYILRPR 224
H Y L+PR
Sbjct: 114 HQAWYFLQPR 123
>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 = 39.9 bits (94), Expect = 2e-04
Identities = 21/62 (33%), Positives = 30/62 (48%), Gaps = 2/62 (3%)
Query: 141 TVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVKPSEHKLVFQVFDMNRLTRDDFLGMVEL 200
+++ D T T T+ KT +PVWNEEF V + L VF + DDF+ +
Sbjct: 40 SIDVDDTH-IGKTSTKPKTNSPVWNEEFTTEVH-NGRNLELTVFHDAAIGPDDFVANCTI 97
Query: 201 SL 202
S
Sbjct: 98 SF 99
>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 = 39.7 bits (93), Expect = 2e-04
Identities = 23/58 (39%), Positives = 31/58 (53%), Gaps = 1/58 (1%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSEHK-LVFQVFDMNRLTRDDFLGMVELSLLNLPRES 209
TK TLNP WN F VK E L VFD + + DDFLG E+ + ++ +E+
Sbjct: 51 TKVVSDTLNPKWNSSMQFFVKDLEQDVLCITVFDRDFFSPDDFLGRTEIRVADILKET 108
>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 = 39.3 bits (92), Expect = 3e-04
Identities = 22/71 (30%), Positives = 37/71 (52%), Gaps = 6/71 (8%)
Query: 154 KTR--KKTLNPVWNEEFIF----RVKPSEHKLVFQVFDMNRLTRDDFLGMVELSLLNLPR 207
KTR +KT NPV++E F F + + L F V +R +RDD +G V L
Sbjct: 55 KTRVLRKTRNPVYDETFTFYGIPYNQLQDLSLHFAVLSFDRYSRDDVIGEVVCPLAGADL 114
Query: 208 ESDGCVIHNKK 218
++G ++ +++
Sbjct: 115 LNEGELLVSRE 125
>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 = 39.2 bits (92), Expect = 3e-04
Identities = 20/55 (36%), Positives = 27/55 (49%), Gaps = 7/55 (12%)
Query: 154 KTRKKT--LNPVWNEEFIFRVK----PSEHKLVFQVFDMNRLTRDDFLGMVELSL 202
KTR LNPVWNE F + + P E L V D ++ R+ +G +SL
Sbjct: 29 KTRVLENELNPVWNETFEWPLAGSPDPDE-SLEIVVKDYEKVGRNRLIGSATVSL 82
>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 = 38.7 bits (91), Expect = 3e-04
Identities = 20/59 (33%), Positives = 35/59 (59%), Gaps = 2/59 (3%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSEH-KLVFQVFDMNRLTRDDFLGMVELSLLNLPRESD 210
T T TLNPVW+E V S + K+ +V D ++ +D LG VE+++ +L ++++
Sbjct: 38 TVTISNTLNPVWDEVLYVPVT-SPNQKITLEVMDYEKVGKDRSLGSVEINVSDLIKKNE 95
>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 = 38.8 bits (91), Expect = 4e-04
Identities = 18/42 (42%), Positives = 27/42 (64%), Gaps = 3/42 (7%)
Query: 166 EEFIFRVKPSEHKLVFQVFDMNRLTRDDFLGMVELSLLNLPR 207
+E +++ P KL QV+D ++ + DDFLG +EL L LPR
Sbjct: 85 DETEYKIPP---KLTLQVWDNDKFSPDDFLGSLELDLSILPR 123
>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 = 38.8 bits (91), Expect = 5e-04
Identities = 21/74 (28%), Positives = 35/74 (47%), Gaps = 4/74 (5%)
Query: 154 KTR---KKTLNPVWNEEFIFRV-KPSEHKLVFQVFDMNRLTRDDFLGMVELSLLNLPRES 209
+TR + NP WNEE +F +P E L+ V D +D+ LG + L ++ R
Sbjct: 35 RTRPSQTRNGNPSWNEELMFVAAEPFEDHLILSVEDRVGPNKDEPLGRAVIPLNDIERRV 94
Query: 210 DGCVIHNKKYILRP 223
D + ++ + L
Sbjct: 95 DDRPVPSRWFSLER 108
>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 = 38.4 bits (90), Expect = 5e-04
Identities = 25/82 (30%), Positives = 37/82 (45%), Gaps = 6/82 (7%)
Query: 119 LRIIAGHSLAKKDIFGAR---IDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVKPS 175
+RI+ +L G + L NG + I A T+T TLNP W+EEF V
Sbjct: 5 IRIVRAENLKADSSNGLSDPYVTLVDTNGKRRI--AKTRTIYDTLNPRWDEEFELEVPAG 62
Query: 176 EHK-LVFQVFDMNRLTRDDFLG 196
E + V+D + + + D G
Sbjct: 63 EPLWISATVWDRSFVGKHDLCG 84
>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 = 38.1 bits (89), Expect = 6e-04
Identities = 20/54 (37%), Positives = 28/54 (51%), Gaps = 4/54 (7%)
Query: 153 TKTRKKTLNPVWN-EEFIFRVKP---SEHKLVFQVFDMNRLTRDDFLGMVELSL 202
T KK+LNPVWN E F F V + L +V D + + +D +G V + L
Sbjct: 36 TDVVKKSLNPVWNSEWFRFEVDDEELQDEPLQIRVMDHDTYSANDAIGKVYIDL 89
>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 = 37.5 bits (87), Expect = 0.001
Identities = 23/88 (26%), Positives = 43/88 (48%), Gaps = 6/88 (6%)
Query: 119 LRIIAGHSLAKKDIFGAR---IDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVKPS 175
L II +L DI G + ++ + + + T +K TLNP +NE +F V P
Sbjct: 18 LTIIKARNLKAMDITGFSDPYVKVSLMCEGRRLKKKKTSVKKNTLNPTYNEALVFDVPPE 77
Query: 176 --EH-KLVFQVFDMNRLTRDDFLGMVEL 200
++ L+ V D +R+ ++ +G+ +
Sbjct: 78 NVDNVSLIIAVVDYDRVGHNELIGVCRV 105
>gnl|CDD|215520 PLN02964, PLN02964, phosphatidylserine decarboxylase.
Length = 644
Score = 39.1 bits (91), Expect = 0.001
Identities = 30/104 (28%), Positives = 44/104 (42%), Gaps = 8/104 (7%)
Query: 103 MSSNNSAPEEPTEQIRLRIIAGHSLAKKDIFGARIDLNTVNGDQTIDSALTKTRKKTLNP 162
S + E I L + G + KD + A + G+QT T+T T P
Sbjct: 41 SVSQRAVSAEDFSGIALLTLVGAEMKFKDKWLACVSF----GEQTFR---TETSDSTDKP 93
Query: 163 VWNEEFIFRV-KPSEHKLVFQVFDMNRLTRDDFLGMVELSLLNL 205
VWN E + K H VF+ NRL+++ +G EL L +
Sbjct: 94 VWNSEKKLLLEKNGPHLARISVFETNRLSKNTLVGYCELDLFDF 137
>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 = 36.4 bits (85), Expect = 0.002
Identities = 14/34 (41%), Positives = 20/34 (58%), Gaps = 1/34 (2%)
Query: 153 TKTRKKTLNPVWNEEFIFRV-KPSEHKLVFQVFD 185
+K +++T NPVW E F F V P +L +V D
Sbjct: 36 SKVKERTNNPVWEEGFTFLVRNPENQELEIEVKD 69
>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 = 36.1 bits (84), Expect = 0.004
Identities = 17/57 (29%), Positives = 23/57 (40%), Gaps = 9/57 (15%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSEHKLVF-------QVFDMNRLTRDDFLGMVELSL 202
T +K LNPV++E F F V E K ++R LG V + L
Sbjct: 57 TSVKKDNLNPVFDETFEFPVSLEELKRRTLDVAVKNSKSFLSR--EKKLLGQVLIDL 111
>gnl|CDD|227354 COG5021, HUL4, Ubiquitin-protein ligase [Posttranslational
modification, protein turnover, chaperones].
Length = 872
Score = 37.4 bits (87), Expect = 0.004
Identities = 16/63 (25%), Positives = 26/63 (41%), Gaps = 3/63 (4%)
Query: 64 QQGALPPGWEERTDANGRTYYVNHIARCTQWERPTVHHTMS---SNNSAPEEPTEQIRLR 120
L + R D+ GRTYY++H TQ+ RP + T+ S + + I+
Sbjct: 295 SLLRLNSLFSTRADSFGRTYYLDHDRILTQYSRPLLEETLGESTSFLVVNNDDSSSIKDL 354
Query: 121 IIA 123
Sbjct: 355 PHQ 357
Score = 27.8 bits (62), Expect = 6.2
Identities = 19/97 (19%), Positives = 30/97 (30%), Gaps = 10/97 (10%)
Query: 25 LEVSRHRES----ADPDSWIIVDASTESIVETPAQPLFIGGVEQQGALPPGWEERTDANG 80
S S D + S ES A + ++G L GW+ R +
Sbjct: 402 FLFSDFLTSSSTYEDLRREQLGRESDESFYV--ASNVQQQRASREGPLLSGWKTRLNNLY 459
Query: 81 RTYYVNHIARCTQWERPTVHHTMSSNNSAPEEPTEQI 117
R Y+V H + + S S + +I
Sbjct: 460 RFYFVEHRKKTLTKNDS----RLGSFISLNKLDIRRI 492
>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 = 35.6 bits (83), Expect = 0.004
Identities = 25/100 (25%), Positives = 38/100 (38%), Gaps = 24/100 (24%)
Query: 122 IAGHSLAKKDIFG--------ARIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVK 173
+G L KKD FG +R + T+ K TLNPVW F +
Sbjct: 7 FSGKKLDKKDFFGKSDPFLEISRQS----EDGTWVLVYRTEVIKNTLNPVWKP---FTI- 58
Query: 174 PSEH--------KLVFQVFDMNRLTRDDFLGMVELSLLNL 205
P + + +V+D + + D +G E +L L
Sbjct: 59 PLQKLCNGDYDRPIKIEVYDYDSSGKHDLIGEFETTLDEL 98
>gnl|CDD|176017 cd04052, C2B_Tricalbin-like, C2 domain second repeat present in
Tricalbin-like proteins. 5 to 6 copies of the C2 domain
are present in Tricalbin, a yeast homolog of
Synaptotagmin, which is involved in membrane trafficking
and sorting. C2 domains fold into an 8-standed
beta-sandwich that can adopt 2 structural arrangements:
Type I and Type II, distinguished by a circular
permutation involving their N- and C-terminal beta
strands. Many C2 domains are Ca2+-dependent
membrane-targeting modules that bind a wide variety of
substances including bind phospholipids, inositol
polyphosphates, and intracellular proteins. Most C2
domain proteins are either signal transduction enzymes
that contain a single C2 domain, such as protein kinase
C, or membrane trafficking proteins which contain at
least two C2 domains, such as synaptotagmin 1. However,
there are a few exceptions to this including RIM
isoforms and some splice variants of piccolo/aczonin and
intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions. This cd contains the second C2
repeat, C2B, and has a type-II topology.
Length = 111
Score = 35.3 bits (82), Expect = 0.006
Identities = 19/52 (36%), Positives = 28/52 (53%), Gaps = 4/52 (7%)
Query: 153 TKTRKKTLNPVWNE--EFIFRVKPSEHKLVFQVFDMNRLTRDDFLGMVELSL 202
T+ +KKT NP WN EF+ + + ++ V D +R D LG V +SL
Sbjct: 29 TRVKKKTNNPSWNASTEFLVTDR-RKSRVTVVVKD-DRDRHDPVLGSVSISL 78
>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 = 34.7 bits (80), Expect = 0.009
Identities = 18/53 (33%), Positives = 28/53 (52%), Gaps = 3/53 (5%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSE---HKLVFQVFDMNRLTRDDFLGMVELSL 202
T ++ T NPV+NE + + S+ L V+ +R R+ FLG VE+ L
Sbjct: 57 TSIKRNTTNPVYNETLKYSISHSQLETRTLQLSVWHYDRFGRNTFLGEVEIPL 109
>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 = 34.4 bits (80), Expect = 0.016
Identities = 16/57 (28%), Positives = 30/57 (52%), Gaps = 10/57 (17%)
Query: 150 SALTKTRKKTLNPVWNEEFIFR----------VKPSEHKLVFQVFDMNRLTRDDFLG 196
S T+ K+TL+P W++ IF + + +V ++FD + + +D+FLG
Sbjct: 34 SQETEVIKETLSPTWDQTLIFDEVELYGSPEEIAQNPPLVVVELFDQDSVGKDEFLG 90
>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 = 34.2 bits (79), Expect = 0.016
Identities = 20/65 (30%), Positives = 33/65 (50%), Gaps = 6/65 (9%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKP----SEHKLVFQVFDMNRLTRDDFLGMV--ELSLLNLP 206
TK +KT NP +NE ++ P + L V+ + L ++FLG V L L+L
Sbjct: 53 TKVVRKTRNPTFNEMLVYDGLPVEDLQQRVLQVSVWSHDSLVENEFLGGVCIPLKKLDLS 112
Query: 207 RESDG 211
+E++
Sbjct: 113 QETEK 117
>gnl|CDD|175998 cd04032, C2_Perforin, C2 domain of Perforin. Perforin contains a
single copy of a C2 domain in its C-terminus and plays a
role in lymphocyte-mediated cytotoxicity. Mutations in
perforin leads to familial hemophagocytic
lymphohistiocytosis type 2. The function of perforin is
calcium dependent and the C2 domain is thought to confer
this binding to target cell membranes. C2 domains fold
into an 8-standed beta-sandwich that can adopt 2
structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 127
Score = 33.4 bits (77), Expect = 0.033
Identities = 17/44 (38%), Positives = 22/44 (50%), Gaps = 2/44 (4%)
Query: 161 NPVWNEEFIF-RVKPSE-HKLVFQVFDMNRLTRDDFLGMVELSL 202
NP WN F F V+ S KL F+V+D + DD LG +
Sbjct: 71 NPRWNATFDFGSVELSPGGKLRFEVWDRDNGWDDDLLGTCSVVP 114
>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 = 32.3 bits (74), Expect = 0.067
Identities = 20/59 (33%), Positives = 29/59 (49%), Gaps = 2/59 (3%)
Query: 150 SALTKTRKKTLNPVWNEEFIF-RVKPSEHKLVFQVFDMNRLTRDDFLGMVELSLLNLPR 207
TK ++T NP WN+ F F + + L V+D ++ DDFLG V L +P
Sbjct: 29 KGSTKAIERTSNPEWNQVFAFSKDRLQGSTLEVSVWDKDKAK-DDFLGGVCFDLSEVPT 86
>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 = 32.3 bits (74), Expect = 0.074
Identities = 21/62 (33%), Positives = 30/62 (48%), Gaps = 9/62 (14%)
Query: 117 IRLRIIAGHSLAKKDIFGA--RIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVKP 174
++L ++ H L K + I LN V A TK R+ NPVW+EEF+F P
Sbjct: 6 LQLNVLEAHKLPVKHVPHPYCVISLNEVK------VARTKVRE-GPNPVWSEEFVFDDLP 58
Query: 175 SE 176
+
Sbjct: 59 PD 60
>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 = 32.3 bits (74), Expect = 0.084
Identities = 21/70 (30%), Positives = 37/70 (52%), Gaps = 4/70 (5%)
Query: 137 IDLNTVNGD-QTIDSALTKTRKKTLNPVWNEEFIFRV---KPSEHKLVFQVFDMNRLTRD 192
+ L +N D Q I + T R+ +P + E F+F+V + SE L+F V++ ++ R
Sbjct: 40 VKLTLLNSDGQEISKSKTSIRRGQPDPEFKETFVFQVALFQLSEVTLMFSVYNKRKMKRK 99
Query: 193 DFLGMVELSL 202
+ +G L L
Sbjct: 100 EMIGWFSLGL 109
>gnl|CDD|165867 PLN02223, PLN02223, phosphoinositide phospholipase C.
Length = 537
Score = 33.5 bits (76), Expect = 0.094
Identities = 25/80 (31%), Positives = 37/80 (46%), Gaps = 4/80 (5%)
Query: 127 LAKKDIFGARIDLNTVNGDQTIDSALTKTRKKTLNPVWNEEFIFRVKPSEHKLV-FQVFD 185
L+K D++ RI + V D+ I K + P W EEF F + + L+ F+V+D
Sbjct: 432 LSKPDLY-VRISIAGVPHDEKIMKTTVKNNEWK--PTWGEEFTFPLTYPDLALISFEVYD 488
Query: 186 MNRLTRDDFLGMVELSLLNL 205
T D F G L + L
Sbjct: 489 YEVSTADAFCGQTCLPVSEL 508
>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 = 31.8 bits (73), Expect = 0.11
Identities = 16/68 (23%), Positives = 24/68 (35%), Gaps = 6/68 (8%)
Query: 161 NPVWNEEFIFRVKPSEH-----KLVFQVFDMNRLTRDDFLGMVELSLLNLPRESD-GCVI 214
NP WNE F + L +V+ D +G V + L +L + +
Sbjct: 46 NPTWNETLRFPLDERLLQQGRLALTIEVYCERPSLGDKLIGEVRVPLKDLLDGASPAGEL 105
Query: 215 HNKKYILR 222
Y LR
Sbjct: 106 RFLSYQLR 113
>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 = 30.7 bits (70), Expect = 0.22
Identities = 23/59 (38%), Positives = 36/59 (61%), Gaps = 7/59 (11%)
Query: 153 TKTRKKTLNPVWNEEFIF-RVKPSE---HKLVFQVFDMNRLTRDDFLG--MVELSLLNL 205
TK ++ NPV+NE F F RV+P E L F+++ + R+ ++ +G +V LS LNL
Sbjct: 55 TKVQRGP-NPVFNETFTFSRVEPEELNNMALRFRLYGVERMRKERLIGEKVVPLSQLNL 112
>gnl|CDD|227435 COG5104, PRP40, Splicing factor [RNA processing and
modification].
Length = 590
Score = 32.0 bits (72), Expect = 0.24
Identities = 11/26 (42%), Positives = 14/26 (53%)
Query: 72 WEERTDANGRTYYVNHIARCTQWERP 97
WEE +GR YY N + WE+P
Sbjct: 17 WEELKAPDGRIYYYNKRTGKSSWEKP 42
Score = 31.6 bits (71), Expect = 0.32
Identities = 11/27 (40%), Positives = 17/27 (62%)
Query: 71 GWEERTDANGRTYYVNHIARCTQWERP 97
W+E A+G+ YY N I R ++W+ P
Sbjct: 57 PWKECRTADGKVYYYNSITRESRWKIP 83
>gnl|CDD|178538 PLN02952, PLN02952, phosphoinositide phospholipase C.
Length = 599
Score = 31.9 bits (72), Expect = 0.25
Identities = 24/75 (32%), Positives = 36/75 (48%), Gaps = 7/75 (9%)
Query: 149 DSALTKTR--KKTLNPVWNEEFIFRVKPSEHKLV---FQVFDMNRLTRDDFLGMVELSLL 203
D+A KT+ + P WNEEF F + E L+ + +DM+ +DDF G L +
Sbjct: 511 DNAKKKTKIIEDNWYPAWNEEFSFPLTVPELALLRIEVREYDMSE--KDDFGGQTCLPVS 568
Query: 204 NLPRESDGCVIHNKK 218
L +H+KK
Sbjct: 569 ELRPGIRSVPLHDKK 583
>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 = 30.3 bits (69), Expect = 0.30
Identities = 16/61 (26%), Positives = 26/61 (42%), Gaps = 9/61 (14%)
Query: 152 LTKTRKKTL-------NPVWNEEFIFRVKPS-EHKLVFQVFDMNRLTRDDFLGMVELSLL 203
+ KKT +P W+EE F + + L VFD ++ + D +G E+ L
Sbjct: 30 IGGVTKKTKTDFRGGQHPEWDEELRFEITEDKKPILKVAVFDDDK-RKPDLIGDTEVDLS 88
Query: 204 N 204
Sbjct: 89 P 89
>gnl|CDD|177875 PLN02230, PLN02230, phosphoinositide phospholipase C 4.
Length = 598
Score = 31.6 bits (71), Expect = 0.35
Identities = 21/74 (28%), Positives = 38/74 (51%), Gaps = 3/74 (4%)
Query: 148 IDSALTKTRKK--TLNPVWNEEFIFRVKPSEHKLV-FQVFDMNRLTRDDFLGMVELSLLN 204
+D + KT+ + T P+WN+EFIF + E L+ +V + + +DDF G L +
Sbjct: 509 VDEVMEKTKIEYDTWTPIWNKEFIFPLAVPELALLRVEVHEHDINEKDDFGGQTCLPVSE 568
Query: 205 LPRESDGCVIHNKK 218
+ + + N+K
Sbjct: 569 IRQGIHAVPLFNRK 582
>gnl|CDD|131102 TIGR02047, CadR-PbrR, Cd(II)/Pb(II)-responsive transcriptional
regulator. This model represents the cadmium(II)
and/or lead(II) responsive transcriptional activator of
the proteobacterial metal efflux system. This protein
is a member of the MerR family of transcriptional
activators (pfam00376) and contains a distinctive
pattern of cysteine residues in its metal binding loop,
Cys-X(6-9)-Cys, as well as a conserved and critical
cysteine at the N-terminal end of the dimerization
helix.
Length = 127
Score = 29.4 bits (66), Expect = 0.64
Identities = 15/30 (50%), Positives = 17/30 (56%), Gaps = 2/30 (6%)
Query: 63 EQQGALPPGWEERTDANGRTYYVNHIARCT 92
E+QG LPP RTD N R Y V H+ R
Sbjct: 21 EKQGLLPP--PARTDNNYRVYTVGHVERLA 48
>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 = 29.4 bits (66), Expect = 0.69
Identities = 18/53 (33%), Positives = 26/53 (49%), Gaps = 3/53 (5%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSE---HKLVFQVFDMNRLTRDDFLGMVELSL 202
T +K T+NPV+NE + V+ +L V+ L R FLG V + L
Sbjct: 57 TAVKKGTVNPVFNETLKYVVEADLLSSRQLQVSVWHSRTLKRRVFLGEVLIPL 109
>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 = 29.0 bits (65), Expect = 0.87
Identities = 10/26 (38%), Positives = 15/26 (57%)
Query: 151 ALTKTRKKTLNPVWNEEFIFRVKPSE 176
A T+ + T P WNEEF ++ S+
Sbjct: 33 AKTRVCRDTTEPNWNEEFEIELEGSQ 58
>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 = 28.4 bits (63), Expect = 1.7
Identities = 13/24 (54%), Positives = 16/24 (66%), Gaps = 1/24 (4%)
Query: 153 TKTRKKTLNPVWNEEFIFRVKPSE 176
TK K +NPVWNE +F + PSE
Sbjct: 58 TKRAKHKINPVWNEMIMFEL-PSE 80
>gnl|CDD|133378 cd00592, HTH_MerR-like, Helix-Turn-Helix DNA binding domain of
MerR-like transcription regulators. Helix-turn-helix
(HTH) MerR-like transcription regulator, N-terminal
domain. The MerR family transcription regulators have
been shown to mediate responses to stress including
exposure to heavy metals, drugs, or oxygen radicals in
eubacterial and some archaeal species. They regulate
transcription of multidrug/metal ion transporter genes
and oxidative stress regulons by reconfiguring the
spacer between the -35 and -10 promoter elements. A
typical MerR regulator is comprised of two distinct
domains that harbor the regulatory (effector-binding)
site and the active (DNA-binding) site. Their
N-terminal domains are homologous and contain a
DNA-binding winged HTH motif, while the C-terminal
domains are often dissimilar and bind specific
coactivator molecules such as metal ions, drugs, and
organic substrates.
Length = 100
Score = 27.6 bits (62), Expect = 1.9
Identities = 10/28 (35%), Positives = 15/28 (53%), Gaps = 3/28 (10%)
Query: 63 EQQGALPPGWEERTDANGRTYYVNHIAR 90
E++G LPP ER++ R Y + R
Sbjct: 21 EEKGLLPP---ERSENGYRLYSEEDLER 45
>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 = 27.7 bits (62), Expect = 2.1
Identities = 18/58 (31%), Positives = 27/58 (46%), Gaps = 6/58 (10%)
Query: 153 TKTRKKTLNPVWNEEFIF----RVKPSEHKLVFQVFDMNRLTRDDFL-GMVELSLLNL 205
TK++ +P +NE F F P ++L V D RDD L G+ L L ++
Sbjct: 42 TKSKNNNWSPKYNETFQFILGNEDDPESYELHICVKDYC-FARDDRLVGVTVLQLRDI 98
>gnl|CDD|176074 cd08692, C2B_Tac2-N, C2 domain second repeat found in Tac2-N
(Tandem C2 protein in Nucleus). Tac2-N contains two C2
domains and a short C-terminus including a WHXL motif,
which are key in stabilizing transport vesicles to the
plasma membrane by binding to a plasma membrane.
However unlike the usual carboxyl-terminal-type (C-type)
tandem C2 proteins, it lacks a transmembrane domain, a
Slp-homology domain, and a Munc13-1-interacting domain.
Homology search analysis indicate that no known protein
motifs are located in its N-terminus, making Tac2-N a
novel class of Ca2+-independent, C-type tandem C2
proteins. The C2 domain was first identified in PKC. C2
domains fold into an 8-standed beta-sandwich that can
adopt 2 structural arrangements: Type I and Type II,
distinguished by a circular permutation involving their
N- and C-terminal beta strands. Many C2 domains are
Ca2+-dependent membrane-targeting modules that bind a
wide variety of substances including bind phospholipids,
inositol polyphosphates, and intracellular proteins.
Most C2 domain proteins are either signal transduction
enzymes that contain a single C2 domain, such as protein
kinase C, or membrane trafficking proteins which contain
at least two C2 domains, such as synaptotagmin 1.
However, there are a few exceptions to this including
RIM isoforms and some splice variants of piccolo/aczonin
and intersectin which only have a single C2 domain. C2
domains with a calcium binding region have negatively
charged residues, primarily aspartates, that serve as
ligands for calcium ions.
Length = 135
Score = 27.6 bits (61), Expect = 2.9
Identities = 17/53 (32%), Positives = 25/53 (47%), Gaps = 3/53 (5%)
Query: 153 TKTRKKTLNPV-WNEEFIFRVKPSEHKLVFQV--FDMNRLTRDDFLGMVELSL 202
T+ K + V W E IF V EH + F + + + + R FLG V +S
Sbjct: 55 TRLVKSSNGQVKWGETMIFPVTQQEHGIQFLIKLYSRSSVRRKHFLGQVWISS 107
>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 = 27.4 bits (61), Expect = 3.3
Identities = 14/45 (31%), Positives = 23/45 (51%), Gaps = 2/45 (4%)
Query: 153 TKTRKKTLNPVWNEEFIFRV-KPSEHK-LVFQVFDMNRLTRDDFL 195
T T + NP+++E F F V + K L+ V++ +RD L
Sbjct: 52 TSTVPDSANPLFHETFSFDVNERDYQKRLLVTVWNKLSKSRDSGL 96
>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 = 27.3 bits (61), Expect = 3.8
Identities = 9/44 (20%), Positives = 17/44 (38%), Gaps = 3/44 (6%)
Query: 143 NGDQTIDSALTKTRKKTLNPVWNEEFIFRVKP---SEHKLVFQV 183
++ + + T+ +P +NE F F+V L V
Sbjct: 45 IHNKVVKTKKTEVVDGAASPSFNESFSFKVTSRQLDTASLSLSV 88
>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 = 27.2 bits (60), Expect = 4.0
Identities = 16/58 (27%), Positives = 26/58 (44%), Gaps = 3/58 (5%)
Query: 151 ALTKTRKKTLNPVWNEEFIFRVKPSEH---KLVFQVFDMNRLTRDDFLGMVELSLLNL 205
A T +K L+ W EE +F + E L + +R +R LG + L L ++
Sbjct: 49 AQTALKKLALHTQWEEELVFPLPEEESLDGTLTLTLRCCDRFSRHSTLGELRLKLADV 106
>gnl|CDD|176040 cd08394, C2A_Munc13, C2 domain first 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 first C2
repeat, C2A, and has a type-II topology.
Length = 127
Score = 27.0 bits (60), Expect = 5.1
Identities = 12/42 (28%), Positives = 22/42 (52%), Gaps = 3/42 (7%)
Query: 162 PVWNEEFIFRVKPSEHKLVFQVFDMNR-LTRDDFLGMVELSL 202
P W ++F+F + + LV ++ N+ L D +G V + L
Sbjct: 43 PCWEQDFMFEINRLDLGLVIEL--WNKGLIWDTLVGTVWIPL 82
>gnl|CDD|178712 PLN03168, PLN03168, chalcone synthase; Provisional.
Length = 389
Score = 27.3 bits (60), Expect = 7.0
Identities = 17/51 (33%), Positives = 26/51 (50%), Gaps = 1/51 (1%)
Query: 146 QTIDSALTKTRKKTLNPVWNEEFIFRVKPSEHKLVFQVFDMNRLTRDDFLG 196
+ I+ L + RK +P WNE F + V P ++ QV +LT+D G
Sbjct: 276 KNIEKFLNEARKCVGSPDWNEMF-WAVHPGGPAILDQVEAKLKLTKDKMQG 325
>gnl|CDD|179433 PRK02496, adk, adenylate kinase; Provisional.
Length = 184
Score = 27.0 bits (60), Expect = 7.0
Identities = 11/32 (34%), Positives = 19/32 (59%), Gaps = 1/32 (3%)
Query: 131 DIFGARIDLNTVNGDQTIDSALTKTRKKTLNP 162
D + R L T++G+Q+++ A+T K L P
Sbjct: 154 DYYRDRQKLLTIDGNQSVE-AVTTELKAALAP 184
>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 = 26.6 bits (59), Expect = 8.0
Identities = 17/48 (35%), Positives = 25/48 (52%), Gaps = 5/48 (10%)
Query: 153 TKTRKKTLNPVW-NEEFIFRVKPSEHKLVFQV---FDMNRLTRDDFLG 196
T + T+NPVW E+F+F P++ L +V F +R FLG
Sbjct: 49 TSIVENTINPVWHREQFVFVGLPTD-VLEIEVKDKFAKSRPIIRRFLG 95
>gnl|CDD|235653 PRK05952, PRK05952, 3-oxoacyl-(acyl carrier protein) synthase II;
Reviewed.
Length = 381
Score = 26.9 bits (60), Expect = 8.3
Identities = 10/21 (47%), Positives = 12/21 (57%)
Query: 50 VETPAQPLFIGGVEQQGALPP 70
VE P PL + G +Q GAL
Sbjct: 173 VEAPITPLTLAGFQQMGALAK 193
>gnl|CDD|222580 pfam14180, DOCK_C2, GTP-GDP exchange factor. Dock proteins are
atypical GTP-GDP exchange factors for the small GTPases
Pac and Cdc42, and are implicated in biological roles
related to cell-migration and phagocytosis.
Length = 178
Score = 26.6 bits (59), Expect = 8.9
Identities = 15/68 (22%), Positives = 28/68 (41%), Gaps = 12/68 (17%)
Query: 161 NPVWNEEFIFRV---KPSEHKLVFQVFD----MNRLTRDDFLGMVELSLLNLPRESDGCV 213
NP +N+EF ++ H L+F + + + +G L LL+ G
Sbjct: 70 NPQFNDEFKLQLPLDLTPGHHLLFTFYHVSVKKKKKKVETPIGYAFLPLLD-----KGGF 124
Query: 214 IHNKKYIL 221
I + ++ L
Sbjct: 125 IRDGEHTL 132
>gnl|CDD|131404 TIGR02351, thiH, thiazole biosynthesis protein ThiH. Members this
protein family are the ThiH protein of thiamine
biosynthesis, a homolog of the BioB protein of biotin
biosynthesis. Genes for the this protein generally are
found in operons with other thiamin biosynthesis genes
[Biosynthesis of cofactors, prosthetic groups, and
carriers, Thiamine].
Length = 366
Score = 26.9 bits (60), Expect = 10.0
Identities = 10/45 (22%), Positives = 20/45 (44%), Gaps = 5/45 (11%)
Query: 122 IAGHSLAKKDIFGARIDLNTVNGDQTIDSALTKTRKKTLNPVWNE 166
G+S KK + + ++ ++++ R K L PVW +
Sbjct: 323 PGGYSSEKKGL-----EQFEISDERSVAEVEEDLRSKGLQPVWKD 362
Database: CDD.v3.10
Posted date: Mar 20, 2013 7:55 AM
Number of letters in database: 10,937,602
Number of sequences in database: 44,354
Lambda K H
0.318 0.134 0.402
Gapped
Lambda K H
0.267 0.0779 0.140
Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 44354
Number of Hits to DB: 11,467,252
Number of extensions: 1044740
Number of successful extensions: 979
Number of sequences better than 10.0: 1
Number of HSP's gapped: 929
Number of HSP's successfully gapped: 116
Length of query: 225
Length of database: 10,937,602
Length adjustment: 93
Effective length of query: 132
Effective length of database: 6,812,680
Effective search space: 899273760
Effective search space used: 899273760
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.3 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.7 bits)
S2: 57 (25.6 bits)