RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy9839
(197 letters)
>gnl|CDD|176501 cd08558, PI-PLCc_eukaryota, Catalytic domain of eukaryotic
phosphoinositide-specific phospholipase C and similar
proteins. This family corresponds to the catalytic
domain present in eukaryotic phosphoinositide-specific
phospholipase C (PI-PLC, EC 3.1.4.11) and similar
proteins. The higher eukaryotic PI-PLCs play a critical
role in most signal transduction pathways, controlling
numerous cellular events such as cell growth,
proliferation, excitation and secretion. They strictly
require Ca2+ for the catalytic activity. They display a
clear preference towards the hydrolysis of the more
highly phosphorylated membrane phospholipids
PI-analogues, phosphatidylinositol 4,5-bisphosphate
(PIP2) and phosphatidylinositol-4-phosphate (PIP), to
generate two important second messengers in eukaryotic
signal transduction cascades, inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. The
eukaryotic PI-PLCs have a multidomain organization that
consists of a PLC catalytic core domain, and various
regulatory domains, such as the pleckstrin homology (PH)
domain, EF-hand motif, and C2 domain. The catalytic core
domain is a TIM barrel with two highly conserved regions
(X and Y) split by a linker region. The catalytic
mechanism of eukaryotic PI-PLCs is based on general base
and acid catalysis utilizing two well conserved
histidines and consists of two steps, a phosphotransfer
and a phosphodiesterase reaction. The mammalian PI-PLCs
consist of 13 isozymes, which are classified into
six-subfamilies, PI-PLC-delta (1,3 and 4), -beta(1-4),
-gamma(1,2), -epsilon, -zeta, and -eta (1,2). Ca2+ is
required for the activation of all forms of mammalian
PI-PLCs, and the concentration of calcium influences
substrate specificity. This family also includes
metazoan phospholipase C related but catalytically
inactive proteins (PRIP), which belong to a group of
novel inositol trisphosphate binding proteins. Due to
the replacement of critical catalytic residues, PRIP
does not have PLC enzymatic activity.
Length = 226
Score = 78.6 bits (195), Expect = 4e-18
Identities = 26/35 (74%), Positives = 29/35 (82%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLYSQ 130
DM PLSHYFI+SSHNTYLTG QL GESSV+ Y +
Sbjct: 3 DMTQPLSHYFISSSHNTYLTGDQLTGESSVEAYIR 37
>gnl|CDD|176538 cd08596, PI-PLCc_epsilon, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-epsilon. This
family corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-epsilon isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-epsilon represents
a class of mammalian PI-PLC that has an N-terminal CDC25
homology domain with a guanyl-nucleotide exchange factor
(GFF) activity, a pleckstrin homology (PH) domain, an
array of EF hands, a PLC catalytic core domain, a C2
domain, and two predicted RA (Ras association) domains
that are implicated in the binding of small GTPases,
such as Ras or Rap, from the Ras family. The PLC
catalytic core domain is a TIM barrel with two highly
conserved regions (X and Y) split by a highly degenerate
linker sequence. There is one PI-PLC-epsilon isozyme
(1). PI-PLC-epsilon is activated by G alpha(12/13), G
beta gamma, and activated members of Ras and Rho small
GTPases. Aside from PI-PLC-epsilon identified in
mammals, its eukaryotic homologs have been classified
with this family.
Length = 254
Score = 74.9 bits (184), Expect = 2e-16
Identities = 28/35 (80%), Positives = 33/35 (94%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLYSQ 130
D++ PLS+Y+I SSHNTYLTGHQLKGESSV+LYSQ
Sbjct: 3 DLQYPLSYYYIESSHNTYLTGHQLKGESSVELYSQ 37
>gnl|CDD|176533 cd08591, PI-PLCc_beta, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-beta. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-beta isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-beta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal coiled-coil (CT) domain necessary for
homodimerization. The PLC catalytic core domain is a TIM
barrel with two highly conserved regions (X and Y) split
by a highly degenerate linker sequence. There are four
PLC-beta isozymes (1-4). They are activated by the
heterotrimeric G protein alpha q subunits through their
C2 domain and long C-terminal extension. The beta-gamma
subunits of heterotrimeric G proteins are known to
activate the PLC-beta2 and -beta3 isozymes only. Aside
from four PLC-beta isozymes identified in mammals, some
eukaryotic PLC-beta homologs have been classified into
this subfamily, such as NorpA and PLC-21 from Drosophila
and PLC-beta from turkey, Xenopus, sponge, and hydra.
Length = 257
Score = 72.4 bits (178), Expect = 1e-15
Identities = 25/35 (71%), Positives = 29/35 (82%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLYSQ 130
DM+ PLSHYFI SSHNTYLTG Q G+SSV++Y Q
Sbjct: 3 DMDQPLSHYFINSSHNTYLTGRQFGGKSSVEMYRQ 37
>gnl|CDD|215892 pfam00388, PI-PLC-X, Phosphatidylinositol-specific phospholipase C,
X domain. This associates with pfam00387 to form a
single structural unit.
Length = 145
Score = 68.3 bits (168), Expect = 6e-15
Identities = 25/34 (73%), Positives = 28/34 (82%)
Query: 97 MEMPLSHYFIASSHNTYLTGHQLKGESSVDLYSQ 130
M PLSHYFI+SSHNTYLTG QL G+SSV+ Y Q
Sbjct: 1 MSQPLSHYFISSSHNTYLTGDQLTGKSSVEAYIQ 34
>gnl|CDD|176535 cd08593, PI-PLCc_delta, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-delta. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-delta isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-delta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C-terminal C2 domain.
This CD corresponds to the catalytic domain which is a
TIM barrel with two highly conserved regions (X and Y)
split by a highly degenerate linker sequence. There are
three PI-PLC-delta isozymes (1,3 and 4). PI-PLC-delta1
is relatively well characterized. It is activated by
high calcium levels generated by other PI-PLC family
members, and therefore functions as a calcium amplifier
within the cell. Different PI-PLC-delta isozymes have
different tissue distribution and different subcellular
locations. PI-PLC-delta1 is mostly a cytoplasmic
protein, PI-PLC-delta3 is located in the membrane, and
PI-PLC-delta4 is predominantly detected in the cell
nucleus. Aside from three PI-PLC-delta isozymes
identified in mammals, some eukaryotic PI-PLC-delta
homologs have been classified to this CD.
Length = 257
Score = 68.9 bits (169), Expect = 2e-14
Identities = 24/33 (72%), Positives = 25/33 (75%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLY 128
DM PLSHYFIASSHNTYL QLKG SS + Y
Sbjct: 3 DMTQPLSHYFIASSHNTYLLEDQLKGPSSTEAY 35
>gnl|CDD|176540 cd08598, PI-PLC1c_yeast, Catalytic domain of putative yeast
phosphatidylinositide-specific phospholipases C. This
family corresponds to the catalytic domain present in a
group of putative phosphoinositide-specific
phospholipase C (PI-PLC, EC 3.1.4.11) encoded by PLC1
genes from yeasts, which are homologs of the delta
isoforms of mammalian PI-PLC in terms of overall
sequence similarity and domain organization. Mammalian
PI-PLC is a signaling enzyme that hydrolyzes the
membrane phospholipids
phosphatidylinositol-4,5-bisphosphate (PIP2) to
generate two important second messengers in eukaryotic
signal transduction cascades, inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. The prototype of this CD
is protein Plc1p encoded by PLC1 genes from
Saccharomyces cerevisiae. Plc1p contains both highly
conserved X- and Y- regions of PLC catalytic core
domain, as well as a presumptive EF-hand like calcium
binding motif. Experiments show that Plc1p displays
calcium dependent catalytic properties with high
similarity to those of the mammalian PLCs, and plays
multiple roles in modulating the membrane/protein
interactions in filamentation control. CaPlc1p encoded
by CAPLC1 from the closely related yeast Candida
albicans, an orthologue of S. cerevisiae Plc1p, is also
included in this group. Like Plc1p, CaPlc1p has
conserved presumptive catalytic domain, shows PLC
activity when expressed in E. coli, and is involved in
multiple cellular processes. There are two other gene
copies of CAPLC1 in C. albicans, CAPLC2 (also named as
PIPLC) and CAPLC3. Experiments show CaPlc1p is the only
enzyme in C. albicans which functions as PLC. The
biological functions of CAPLC2 and CAPLC3 gene products
must be clearly different from CaPlc1p, but their exact
roles remain unclear. Moreover, CAPLC2 and CAPLC3 gene
products are more similar to extracellular bacterial
PI-PLC than to the eukaryotic PI-PLC, and they are not
included in this subfamily.
Length = 231
Score = 66.9 bits (164), Expect = 9e-14
Identities = 21/33 (63%), Positives = 26/33 (78%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLY 128
D+ PL+ YFI+SSHNTYL G QL G+SSV+ Y
Sbjct: 3 DLSRPLNEYFISSSHNTYLLGRQLAGDSSVEGY 35
>gnl|CDD|176563 cd08626, PI-PLCc_beta4, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-beta4. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-beta isozyme 4. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-beta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal coiled-coil (CT) domain necessary for
homodimerization. The PLC catalytic core domain is a TIM
barrel with two highly conserved regions (X and Y) split
by a highly degenerate linker sequence. PI-PLC-beta4 is
expressed in high concentrations in cerebellar Purkinje
and granule cells, the median geniculate body, and the
lateral geniculate nucleus. It is activated by the
heterotrimeric G protein alpha q subunits through their
C2 domain and long C-terminal extension.
Length = 257
Score = 65.6 bits (160), Expect = 4e-13
Identities = 24/35 (68%), Positives = 29/35 (82%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLYSQ 130
DM+ PL+HYFI SSHNTYLTG Q G+SSV++Y Q
Sbjct: 3 DMDQPLAHYFINSSHNTYLTGRQFGGKSSVEMYRQ 37
>gnl|CDD|176536 cd08594, PI-PLCc_eta, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-eta. This
family corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-eta isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-eta represents a
class of neuron-speific PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal tail that terminates with a PDZ-binding
motif, a potential interaction site for other signaling
proteins. The PLC catalytic core domain is a TIM barrel
with two highly conserved regions (X and Y) split by a
highly degenerate linker sequence. There are two
PI-PLC-eta isozymes (1-2), both neuron-specific enzymes.
They function as calcium sensors that are activated by
small increases in intracellular calcium concentrations.
The PI-PLC-eta isozymes are also activated through GPCR
stimulation. Aside from the PI-PLC-eta isozymes
identified in mammals, their eukaryotic homologs are
also present in this family.
Length = 227
Score = 63.3 bits (154), Expect = 2e-12
Identities = 25/33 (75%), Positives = 27/33 (81%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLY 128
DM PLSHYFIASSHNTYLTG QL +S VD+Y
Sbjct: 3 DMTQPLSHYFIASSHNTYLTGDQLLSQSRVDMY 35
>gnl|CDD|176534 cd08592, PI-PLCc_gamma, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-gamma. This
family corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-gamma isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-gamma represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C2 domain.The PLC
catalytic core domain is a TIM barrel with two highly
conserved regions (X and Y) split by a highly degenerate
linker sequence. Unique to PI-PLC-gamma, a second PH
domain, two SH2 (Src homology 2) regions, and one SH3
(Src homology 3) region is present within this linker
region. There are two PI-PLC-gamma isozymes (1-2). They
are activated by receptor and non-receptor tyrosine
kinases due to the presence of two SH2 and a single SH3
domain within the linker region. Aside from the two
PI-PLC-gamma isozymes identified in mammals, some
eukaryotic PI-PLC-gamma homologs have been classified
with this subfamily.
Length = 229
Score = 62.4 bits (152), Expect = 3e-12
Identities = 24/35 (68%), Positives = 29/35 (82%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLYSQ 130
DM PLSHY+IASSHNTYLTG QL ESS++ Y++
Sbjct: 3 DMNNPLSHYWIASSHNTYLTGDQLSSESSLEAYAR 37
>gnl|CDD|197543 smart00148, PLCXc, Phospholipase C, catalytic domain (part); domain
X. Phosphoinositide-specific phospholipases C. These
enzymes contain 2 regions (X and Y) which together form
a TIM barrel-like structure containing the active site
residues. Phospholipase C enzymes (PI-PLC) act as signal
transducers that generate two second messengers,
inositol-1,4,5-trisphosphate and diacylglycerol. The
bacterial enzyme appears to be a homologue of the
mammalian PLCs.
Length = 143
Score = 58.8 bits (143), Expect = 2e-11
Identities = 26/34 (76%), Positives = 28/34 (82%)
Query: 97 MEMPLSHYFIASSHNTYLTGHQLKGESSVDLYSQ 130
M+ PLSHYFI SSHNTYLTG QL GESSV+ Y Q
Sbjct: 1 MDKPLSHYFIPSSHNTYLTGKQLWGESSVEGYIQ 34
>gnl|CDD|176539 cd08597, PI-PLCc_PRIP_metazoa, Catalytic domain of metazoan
phospholipase C related, but catalytically inactive
protein. This family corresponds to the catalytic
domain present in metazoan phospholipase C related, but
catalytically inactive proteins (PRIP), which belong to
a group of novel Inositol 1,4,5-trisphosphate (InsP3)
binding protein. PRIP has a primary structure and domain
architecture, incorporating a pleckstrin homology (PH)
domain, an array of EF hands, a PLC catalytic core
domain with highly conserved X- and Y-regions split by a
linker sequence, and a C-terminal C2 domain, similar to
phosphoinositide-specific phospholipases C (PI-PLC, EC
3.1.4.11)-delta isoforms. Due to replacement of critical
catalytic residues, PRIP do not have PLC enzymatic
activity. PRIP consists of two subfamilies,
PRIP-1(previously known as p130 or PLC-1), which is
predominantly expressed in the brain, and PRIP-2
(previously known as PLC-2), which exhibits a relatively
ubiquitous expression. Experiments show both, PRIP-1 and
PRIP-2, are involved in InsP3-mediated calcium signaling
pathway and GABA(A)receptor-mediated signaling pathway.
In addition, PRIP-2 acts as a negative regulator of
B-cell receptor signaling and immune responses.
Length = 260
Score = 59.0 bits (143), Expect = 9e-11
Identities = 24/33 (72%), Positives = 26/33 (78%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLY 128
DM PLSHYFIASSHNTYL QL+G SSV+ Y
Sbjct: 3 DMTQPLSHYFIASSHNTYLIEDQLRGPSSVEGY 35
>gnl|CDD|176560 cd08623, PI-PLCc_beta1, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-beta1. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-beta isozyme 1. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-beta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal coiled-coil (CT) domain necessary for
homodimerization. The PLC catalytic core domain is a TIM
barrel with two highly conserved regions (X and Y) split
by a highly degenerate linker sequence. PI-PLC-beta1 is
expressed at highest levels in specific regions of the
brain. It is activated by the heterotrimeric G protein
alpha q subunits through their C2 domain and long
C-terminal extension.
Length = 258
Score = 58.2 bits (140), Expect = 2e-10
Identities = 25/37 (67%), Positives = 28/37 (75%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLYSQFI 132
DM PLSHYFI SSHNTYLT QL G SSV++Y Q +
Sbjct: 3 DMSQPLSHYFINSSHNTYLTAGQLAGNSSVEMYRQVL 39
>gnl|CDD|176562 cd08625, PI-PLCc_beta3, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-beta3. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-beta isozyme 3. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-beta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal coiled-coil (CT) domain necessary for
homodimerization. The PLC catalytic core domain is a TIM
barrel with two highly conserved regions (X and Y) split
by a highly degenerate linker sequence. PI-PLC-beta3 is
widely expressed at highest levels in brain, liver, and
parotid gland. It is activated by the heterotrimeric G
protein alpha q subunits through their C2 domain and
long C-terminal extension. It is also activated by the
beta-gamma subunits of heterotrimeric G proteins.
Length = 258
Score = 57.8 bits (139), Expect = 3e-10
Identities = 25/35 (71%), Positives = 27/35 (77%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLYSQ 130
DM PLSHYFI SSHNTYLT QL G SSV++Y Q
Sbjct: 3 DMNQPLSHYFINSSHNTYLTAGQLTGLSSVEMYRQ 37
>gnl|CDD|176565 cd08628, PI-PLCc_gamma2, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-gamma2. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-gamma isozyme 2. PI-PLC is a
signaling enzyme that hydrolyze the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-gamma represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C2 domain. The PLC
catalytic core domain is a TIM barrel with two highly
conserved regions (X and Y) split by a highly degenerate
linker sequence. Unique to PI-PLC-gamma2, a second PH
domain, two SH2 (Src homology 2) regions, and one SH3
(Src homology 3) region is present within this linker
region. PI-PLC-gamma2 is highly expressed in cells of
hematopoietic origin. It is activated by receptor and
non-receptor tyrosine kinases due to the presence of two
SH2 and a single SH3 domain within the linker region.
Unlike PI-PLC-gamma1, the activation of PI-PLC-gamma2
may require concurrent stimulation of PI 3-kinase.
Length = 254
Score = 56.2 bits (135), Expect = 9e-10
Identities = 23/34 (67%), Positives = 27/34 (79%)
Query: 95 LDMEMPLSHYFIASSHNTYLTGHQLKGESSVDLY 128
DM PLSHY+I+SSHNTYLTG QL+ ESS + Y
Sbjct: 2 QDMNNPLSHYWISSSHNTYLTGDQLRSESSTEAY 35
>gnl|CDD|176570 cd08633, PI-PLCc_eta2, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-eta2. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-eta isozyme 2. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-eta represents a
class of neuron-speific PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal tail that terminates with a PDZ-binding
motif, a potential interaction site for other signaling
proteins. The PLC catalytic core domain is a TIM barrel
with two highly conserved regions (X and Y) split by a
highly degenerate linker sequence. PI-PLC-eta2 is a
neuron-specific enzyme and expressed in the brain. It
may in part function downstream of G-protein-coupled
receptors and play an important role in the formation
and maintenance of the neuronal network in the postnatal
brain.
Length = 254
Score = 55.8 bits (134), Expect = 1e-09
Identities = 23/34 (67%), Positives = 27/34 (79%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLYS 129
DM PLSHYFI SSHNTYL+G QL +S VD+Y+
Sbjct: 3 DMTQPLSHYFITSSHNTYLSGDQLMSQSRVDMYA 36
>gnl|CDD|176569 cd08632, PI-PLCc_eta1, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-eta1. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-eta isozyme 1. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-eta represents a
class of neuron-speific PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal tail that terminates with a PDZ-binding
motif, a potential interaction site for other signaling
proteins. The PLC catalytic core domain is a TIM barrel
with two highly conserved regions (X and Y) split by a
highly degenerate linker sequence. PI-PLC-eta1 is a
neuron-specific enzyme and expressed in only nerve
tissues such as the brain and spinal cord. It may
perform a fundamental role in the brain.
Length = 253
Score = 55.4 bits (133), Expect = 1e-09
Identities = 23/39 (58%), Positives = 30/39 (76%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLYSQFISD 134
DM+ PL +YFIASSHNTYLTG QL +S VD+Y++ +
Sbjct: 3 DMDQPLCNYFIASSHNTYLTGDQLLSQSKVDMYARVLQA 41
>gnl|CDD|176541 cd08599, PI-PLCc_plant, Catalytic domain of plant
phosphatidylinositide-specific phospholipases C. This
family corresponds to the catalytic domain present in a
group of phosphoinositide-specific phospholipases C
(PI-PLC, EC 3.1.4.11) encoded by PLC genes from higher
plants, which are homologs of mammalian PI-PLC in terms
of overall sequence similarity and domain organization.
Mammalian PI-PLC is a signaling enzyme that hydrolyzes
the membrane phospholipids
phosphatidylinositol-4,5-bisphosphate (PIP2) to
generate two important second messengers in eukaryotic
signal transduction cascades, inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. The domain arrangement of
plant PI-PLCs is structurally similar to the mammalian
PLC-zeta isoform, which lacks the N-terminal pleckstrin
homology (PH) domain, but contains EF-hand like motifs
(which are absent in a few plant PLCs), a PLC catalytic
core domain with X- and Y- highly conserved regions
split by a linker sequence, and a C2 domain. However, at
the sequence level, the plant PI-PLCs are closely
related to the mammalian PLC-delta isoform. Experiments
show that plant PLCs display calcium dependent PLC
catalytic properties, although they lack some of the
N-terminal motifs found in their mammalian counterparts.
A putative calcium binding site may be located at the
region spanning the X- and Y- domains.
Length = 228
Score = 54.7 bits (132), Expect = 2e-09
Identities = 21/30 (70%), Positives = 23/30 (76%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSV 125
DM PLSHYFI SSHN+YLTG+QL SS
Sbjct: 3 DMTAPLSHYFIFSSHNSYLTGNQLSSRSST 32
>gnl|CDD|176568 cd08631, PI-PLCc_delta4, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-delta4. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-delta4 isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-delta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C-terminal C2 domain.
This CD corresponds to the catalytic domain which is a
TIM barrel with two highly conserved regions (X and Y)
split by a highly degenerate linker sequence. There are
three PI-PLC-delta isozymes (1,3 and 4). Unlike
PI-PLC-delta 1 and 3, a putative nuclear export sequence
(NES) located in the EF-hand domain, which may be
responsible transporting PI-PLC-delta1 and 3 from the
cell nucleus, is not present in PI-PLC-delta4.
Experiments show PI-PLC-delta4 is required for the
acrosome reaction in fertilization.
Length = 258
Score = 54.2 bits (130), Expect = 5e-09
Identities = 22/33 (66%), Positives = 25/33 (75%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLY 128
DM PL HYFI SSHNTYL QL+G+SSV+ Y
Sbjct: 3 DMTQPLCHYFICSSHNTYLMEDQLRGQSSVEGY 35
>gnl|CDD|176561 cd08624, PI-PLCc_beta2, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-beta2. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-beta isozyme 2. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-beta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, a C2 domain, and a unique
C-terminal coiled-coil (CT) domain necessary for
homodimerization. The PLC catalytic core domain is a TIM
barrel with two highly conserved regions (X and Y) split
by a highly degenerate linker sequence. PI-PLC-beta2 is
expressed at highest levels in cells of hematopoietic
origin. It is activated by the heterotrimeric G protein
alpha q subunits through their C2 domain and long
C-terminal extension. It is also activated by the
beta-gamma subunits of heterotrimeric G proteins.
Length = 261
Score = 53.1 bits (127), Expect = 1e-08
Identities = 22/35 (62%), Positives = 25/35 (71%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLYSQ 130
DM PL+HYFI SSHNTYLT Q G SS ++Y Q
Sbjct: 3 DMTQPLNHYFINSSHNTYLTAGQFSGLSSPEMYRQ 37
>gnl|CDD|176566 cd08629, PI-PLCc_delta1, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-delta1. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-delta1 isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-delta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C-terminal C2 domain.
This subfamily corresponds to the catalytic domain which
is a TIM barrel with two highly conserved regions (X and
Y) split by a highly degenerate linker sequence. There
are three PI-PLC-delta isozymes (1,3 and 4).
PI-PLC-delta1 is relatively well characterized. It is
activated by high calcium levels generated by other
PI-PLC family members, and therefore functions as a
calcium amplifier within the cell. Unlike PI-PLC-delta
4, PI-PLC-delta1 and 3 possess a putative nuclear export
sequence (NES) located in the EF-hand domain, which may
be responsible transporting PI-PLC-delta1and 3 from the
cell nucleus. Experiments show PI-PLC-delta1 is
essential for normal hair formation.
Length = 258
Score = 52.7 bits (126), Expect = 2e-08
Identities = 20/33 (60%), Positives = 24/33 (72%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLY 128
DM+ PLSHY ++SSHNTYL QL G SS + Y
Sbjct: 3 DMDQPLSHYLVSSSHNTYLLEDQLTGPSSTEAY 35
>gnl|CDD|176564 cd08627, PI-PLCc_gamma1, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-gamma1. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-gamma isozyme 1. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which goes on to phosphorylate other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-gamma represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C2 domain. The PLC
catalytic core domain is a TIM barrel with two highly
conserved regions (X and Y) split by a highly degenerate
linker sequence. Unique to PI-PLC-gamma1, a second PH
domain, two SH2 (Src homology 2) regions, and one SH3
(Src homology 3) region is present within this linker
region. PI-PLC-gamma1 is ubiquitously expressed. It is
activated by receptor and non-receptor tyrosine kinases
due to the presence of two SH2 and a single SH3 domain
within the linker region.
Length = 229
Score = 51.6 bits (123), Expect = 3e-08
Identities = 21/35 (60%), Positives = 28/35 (80%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLYSQ 130
+M PLSHY+I+SSHNTYLTG Q ESS++ Y++
Sbjct: 3 EMNNPLSHYWISSSHNTYLTGDQFSSESSLEAYAR 37
>gnl|CDD|177873 PLN02228, PLN02228, Phosphoinositide phospholipase C.
Length = 567
Score = 52.0 bits (124), Expect = 4e-08
Identities = 23/57 (40%), Positives = 30/57 (52%), Gaps = 2/57 (3%)
Query: 70 FEGFARYLMDKDNFAFASERMCPDDLDMEMPLSHYFIASSHNTYLTGHQLKGESSVD 126
F RYL N D M+ PLSHYF+ + HN+YLTG+Q+ SSV+
Sbjct: 83 LNAFYRYLFSDTNSPLPMSGQVHHD--MKAPLSHYFVYTGHNSYLTGNQVNSRSSVE 137
>gnl|CDD|177868 PLN02222, PLN02222, phosphoinositide phospholipase C 2.
Length = 581
Score = 52.0 bits (124), Expect = 4e-08
Identities = 37/120 (30%), Positives = 55/120 (45%), Gaps = 23/120 (19%)
Query: 60 SGLRSQHCLSFEGFARYLMDKDNFAFASERMCPDDLDMEMPLSHYFIASSHNTYLTGHQL 119
S L ++ L + F +YL +N A + DM+ P+SHYFI + HN+YLTG+QL
Sbjct: 71 SSLLHRNGLHLDAFFKYLFGDNNPPLALHEV---HHDMDAPISHYFIFTGHNSYLTGNQL 127
Query: 120 KGESS----------------VDLYSQFISDYNGED--HYFTRIGPGGLLNLDKIYKTHA 161
+ S +D++ SD + D H T P GL+ K + HA
Sbjct: 128 SSDCSEVPIIDALKKGVRVIELDIWPN--SDKDDIDVLHGMTLTTPVGLIKCLKAIRAHA 185
>gnl|CDD|176537 cd08595, PI-PLCc_zeta, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-zeta. This
family corresponds to the catalytic domain presenting in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-zeta isozyme. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PI-PLC-zeta represents a
class of sperm-specific PI-PLC that has an N-terminal
EF-hand domain, a PLC catalytic core domain, and a
C-terminal C2 domain. The PLC catalytic core domain is a
TIM barrel with two highly conserved regions (X and Y)
split by a highly degenerate linker sequence. There is
one PLC-zeta isozyme (1). PLC-zeta plays a fundamental
role in vertebrate fertilization by initiating
intracellular calcium oscillations that trigger the
embryo development. However, the mechanism of its
activation still remains unclear. Aside from PI-PLC-zeta
identified in mammals, its eukaryotic homologs have been
classified with this family.
Length = 257
Score = 50.3 bits (120), Expect = 9e-08
Identities = 21/33 (63%), Positives = 24/33 (72%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLY 128
DM+ PLS YFI+SSHNTYL QL G S +D Y
Sbjct: 3 DMDHPLSDYFISSSHNTYLVSDQLVGPSDLDGY 35
>gnl|CDD|176567 cd08630, PI-PLCc_delta3, Catalytic domain of metazoan
phosphoinositide-specific phospholipase C-delta3. This
subfamily corresponds to the catalytic domain present in
metazoan phosphoinositide-specific phospholipase C
(PI-PLC, EC 3.1.4.11)-delta3 isozymes. PI-PLC is a
signaling enzyme that hydrolyzes the membrane
phospholipids phosphatidylinositol-4,5-bisphosphate
(PIP2) to generate two important second messengers in
eukaryotic signal transduction cascades, Inositol
1,4,5-trisphosphate (InsP3) and diacylglycerol (DAG).
InsP3 triggers inflow of calcium from intracellular
stores, while DAG, together with calcium, activates
protein kinase C, which then phosphorylates other
molecules, leading to altered cellular activity. Calcium
is required for the catalysis. PLC-delta represents a
class of mammalian PI-PLC that has an N-terminal
pleckstrin homology (PH) domain, an array of EF hands, a
PLC catalytic core domain, and a C-terminal C2 domain.
This family corresponds to the catalytic domain which is
a TIM barrel with two highly conserved regions (X and Y)
split by a highly degenerate linker sequence. There are
three PI-PLC-delta isozymes (1,3 and 4). Unlike
PI-PLC-delta 4, PI-PLC-delta1 and 3 possess a putative
nuclear export sequence (NES) located in the EF-hand
domain, which may be responsible transporting
PI-PLC-delta1 and 3 from the cell nucleus.
Length = 258
Score = 50.4 bits (120), Expect = 9e-08
Identities = 21/33 (63%), Positives = 25/33 (75%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGESSVDLY 128
DM PL+HYFI+SSHNTYLT Q+ G SS + Y
Sbjct: 3 DMSQPLAHYFISSSHNTYLTDSQIGGPSSTEAY 35
>gnl|CDD|178538 PLN02952, PLN02952, phosphoinositide phospholipase C.
Length = 599
Score = 45.4 bits (107), Expect = 6e-06
Identities = 24/62 (38%), Positives = 34/62 (54%), Gaps = 13/62 (20%)
Query: 73 FARYLMDKDNFAFASERMCPDDL----------DMEMPLSHYFIASSHNTYLTGHQLKGE 122
+ R+ ++ D+F + DDL DM PLSHYFI + HN+YLTG+QL +
Sbjct: 94 YTRHGLNLDDFF---HFLLYDDLNGPITPQVHHDMTAPLSHYFIYTGHNSYLTGNQLSSD 150
Query: 123 SS 124
S
Sbjct: 151 CS 152
>gnl|CDD|177875 PLN02230, PLN02230, phosphoinositide phospholipase C 4.
Length = 598
Score = 43.2 bits (101), Expect = 4e-05
Identities = 26/71 (36%), Positives = 36/71 (50%), Gaps = 5/71 (7%)
Query: 59 DSGLRSQHCLSFEGFARYLMDKDNFAFASERMCPDDLD-----MEMPLSHYFIASSHNTY 113
D LR +H ++ +D N+ S + P D M+ PLSHYFI + HN+Y
Sbjct: 74 DEVLRRKHHIAKFTRRNLTLDDFNYYLFSTDLNPPIADQVHQNMDAPLSHYFIFTGHNSY 133
Query: 114 LTGHQLKGESS 124
LTG+QL S
Sbjct: 134 LTGNQLSSNCS 144
>gnl|CDD|150071 pfam09279, efhand_like, Phosphoinositide-specific phospholipase
C, efhand-like. Members of this family are
predominantly found in phosphoinositide-specific
phospholipase C. They adopt a structure consisting of a
core of four alpha helices, in an EF like fold, and are
required for functioning of the enzyme.
Length = 83
Score = 40.2 bits (95), Expect = 4e-05
Identities = 12/36 (33%), Positives = 20/36 (55%)
Query: 54 QRHEPDSGLRSQHCLSFEGFARYLMDKDNFAFASER 89
+++EP+ + + LS +GF RYL +N F E
Sbjct: 44 EKYEPNEEAKKRGQLSLDGFTRYLFSDENSIFNPEH 79
>gnl|CDD|176497 cd00137, PI-PLCc, Catalytic domain of prokaryotic and eukaryotic
phosphoinositide-specific phospholipase C. This
subfamily corresponds to the catalytic domain present in
prokaryotic and eukaryotic phosphoinositide-specific
phospholipase C (PI-PLC), which is a ubiquitous enzyme
catalyzing the cleavage of the sn3-phosphodiester bond
in the membrane phosphoinositides (phosphatidylinositol,
PI; Phosphatidylinositol-4-phosphate, PIP;
phosphatidylinositol 4,5-bisphosphate, PIP2) to yield
inositol phosphates (inositol monosphosphate, InsP;
inositol diphosphate, InsP2; inositol trisphosphate,
InsP3) and diacylglycerol (DAG). The higher eukaryotic
PI-PLCs (EC 3.1.4.11) have a multidomain organization
that consists of a PLC catalytic core domain, and
various regulatory domains. They play a critical role in
most signal transduction pathways, controlling numerous
cellular events, such as cell growth, proliferation,
excitation and secretion. These PI-PLCs strictly require
Ca2+ for their catalytic activity. They display a clear
preference towards the hydrolysis of the more highly
phosphorylated PI-analogues, PIP2 and PIP, to generate
two important second messengers, InsP3 and DAG. InsP3
triggers inflow of calcium from intracellular stores,
while DAG, together with calcium, activates protein
kinase C, which then phosphorylates other molecules,
leading to altered cellular activity. In contrast,
bacterial PI-PLCs contain a single catalytic domain.
Although their precise physiological function remains
unclear, bacterial PI-PLCs may function as virulence
factors in some pathogenic bacteria. They participate in
Ca2+-independent PI metabolism. They are characterized
as phosphatidylinositol-specific phospholipase C (EC
4.6.1.13) that selectively hydrolyze PI, not PIP or
PIP2. The TIM-barrel type catalytic domain in bacterial
PI-PLCs is very similar to the one in eukaryotic
PI-PLCs, in which the catalytic domain is assembled from
two highly conserved X- and Y-regions split by a
divergent linker sequence. The catalytic mechanism of
both prokaryotic and eukaryotic PI-PLCs is based on
general base and acid catalysis utilizing two well
conserved histidines, and consists of two steps, a
phosphotransfer and a phosphodiesterase reaction. This
superfamily also includes a distinctly different type of
eukaryotic PLC, glycosylphosphatidylinositol-specific
phospholipase C (GPI-PLC), an integral membrane protein
characterized in the protozoan parasite Trypanosoma
brucei. T. brucei GPI-PLC hydrolyzes the GPI-anchor on
the variant specific glycoprotein (VSG), releasing
dimyristyl glycerol (DMG), which may facilitate the
evasion of the protozoan to the host#s immune system. It
does not require Ca2+ for its activity and is more
closely related to bacterial PI-PLCs, but not mammalian
PI-PLCs.
Length = 274
Score = 38.0 bits (88), Expect = 0.002
Identities = 11/25 (44%), Positives = 14/25 (56%)
Query: 95 LDMEMPLSHYFIASSHNTYLTGHQL 119
PL+HY I +H+TYLT Q
Sbjct: 2 HPDTQPLAHYSIPGTHDTYLTAGQF 26
>gnl|CDD|165867 PLN02223, PLN02223, phosphoinositide phospholipase C.
Length = 537
Score = 36.9 bits (85), Expect = 0.004
Identities = 14/27 (51%), Positives = 19/27 (70%)
Query: 96 DMEMPLSHYFIASSHNTYLTGHQLKGE 122
DM PLSHYFI +S +Y TG+ + G+
Sbjct: 107 DMHAPLSHYFIHTSLKSYFTGNNVFGK 133
>gnl|CDD|188618 cd09898, H3TH_53EXO, H3TH domain of the 5'-3' exonuclease of Taq
DNA polymerase I and homologs. H3TH
(helix-3-turn-helix) domains of the 5'-3' exonuclease
(53EXO) of mutli-domain DNA polymerase I and single
domain protein homologs are included in this family.
Taq DNA polymerase I contains a polymerase domain for
synthesizing a new DNA strand and a 53EXO domain for
cleaving RNA primers or damaged DNA strands. Taq's
53EXO recognizes and endonucleolytically cleaves a
structure-specific DNA substrate that has a bifurcated
downstream duplex and an upstream template-primer
duplex that overlaps the downstream duplex by 1 bp. The
53EXO cleaves the unpaired 5'-arm of the overlap flap
DNA substrate. 5'-3' exonucleases are members of the
structure-specific, 5' nuclease family that catalyzes
hydrolysis of DNA duplex-containing nucleic acid
structures during DNA replication, repair, and
recombination. These nucleases contain a PIN (PilT N
terminus) domain with a helical arch/clamp region/I
domain (not included here) and inserted within the PIN
domain is an atypical helix-hairpin-helix-2 (HhH2)-like
region. This atypical HhH2 region, the H3TH domain, has
an extended loop with at least three turns between the
first two helices, and only three of the four helices
appear to be conserved. Both the H3TH domain and the
helical arch/clamp region are involved in DNA binding.
Studies suggest that a glycine-rich loop in the H3TH
domain contacts the phosphate backbone of the template
strand in the downstream DNA duplex. The nucleases
within this family have a carboxylate rich active site
that is involved in binding essential divalent metal
ion cofactors (i. e., Mg2+ or Mn2+ or Zn2+) required
for nuclease activity. The first metal binding site is
composed entirely of Asp/Glu residues from the PIN
domain, whereas, the second metal binding site is
composed generally of two Asp residues from the PIN
domain and two Asp residues from the H3TH domain.
Together with the helical arch and network of amino
acids interacting with metal binding ions, the H3TH
region defines a positively charged active-site
DNA-binding groove in structure-specific 5' nucleases.
Length = 73
Score = 27.0 bits (61), Expect = 1.8
Identities = 8/10 (80%), Positives = 9/10 (90%)
Query: 8 LMGDSSDNHP 17
L+GDSSDN P
Sbjct: 10 LVGDSSDNIP 19
>gnl|CDD|216458 pfam01367, 5_3_exonuc, 5'-3' exonuclease, C-terminal SAM fold.
Length = 100
Score = 27.5 bits (62), Expect = 1.9
Identities = 10/15 (66%), Positives = 11/15 (73%), Gaps = 1/15 (6%)
Query: 8 LMGDSSDNHPACVRG 22
L+GDSSDN P V G
Sbjct: 12 LVGDSSDNIPG-VPG 25
>gnl|CDD|233038 TIGR00593, pola, DNA polymerase I. All proteins in this family for
which functions are known are DNA polymerases Many also
have an exonuclease motif. This family is based on the
phylogenomic analysis of JA Eisen (1999, Ph.D. Thesis,
Stanford University) [DNA metabolism, DNA replication,
recombination, and repair].
Length = 887
Score = 28.8 bits (65), Expect = 2.0
Identities = 20/67 (29%), Positives = 27/67 (40%), Gaps = 16/67 (23%)
Query: 8 LMGDSSDNHPACVRGQEMCPILYTTGCIELL-EYGQL--------QFRHGNHRRTQRHEP 58
L+GDSSDN P V+G I T +LL E+G L Q + R
Sbjct: 179 LVGDSSDNIPG-VKG-----IGEKTA-AKLLQEFGSLENIYENLDQIKSAKMREKLIAHK 231
Query: 59 DSGLRSQ 65
+ S+
Sbjct: 232 EDAFLSK 238
>gnl|CDD|131799 TIGR02752, MenG_heptapren, demethylmenaquinone methyltransferase.
MenG is a generic term for a methyltransferase that
catalyzes the last step in menaquinone biosynthesis; the
exact enzymatic activity differs for different MenG
because the menaquinone differ in their prenoid side
chains in different species. Members of this MenG
protein family are 2-heptaprenyl-1,4-naphthoquinone
methyltransferase, and are found together in operons
with the two subunits of the heptaprenyl diphosphate
synthase in Bacillus subtilis and related species
[Biosynthesis of cofactors, prosthetic groups, and
carriers, Menaquinone and ubiquinone].
Length = 231
Score = 27.5 bits (61), Expect = 3.8
Identities = 11/38 (28%), Positives = 19/38 (50%), Gaps = 7/38 (18%)
Query: 154 DKIYKTHAVMDRIASFHLHYHQREHDTNPVRETMRQAR 191
+KIYK + M+ + SF H R+ +TM++
Sbjct: 12 EKIYKKYDRMNSVISFQRHKKWRK-------DTMKRMN 42
>gnl|CDD|226837 COG4403, LcnDR2, Lantibiotic modifying enzyme [Defense mechanisms].
Length = 963
Score = 27.4 bits (61), Expect = 6.2
Identities = 16/59 (27%), Positives = 25/59 (42%), Gaps = 9/59 (15%)
Query: 99 MPLSHYFIASSHNTYLTGHQLKGESSVDLYSQFISDYNGEDHYFTRIGPGGLLNLDKIY 157
PL H + N + QL+GE+ + Y FI+ + E+ G+LN Y
Sbjct: 103 YPLIHKTLVLEINIFRETGQLEGETPQERYKYFITKFLKEE---------GILNFFNEY 152
>gnl|CDD|235591 PRK05755, PRK05755, DNA polymerase I; Provisional.
Length = 880
Score = 27.4 bits (62), Expect = 6.3
Identities = 9/10 (90%), Positives = 9/10 (90%)
Query: 8 LMGDSSDNHP 17
LMGDSSDN P
Sbjct: 181 LMGDSSDNIP 190
>gnl|CDD|239796 cd04268, ZnMc_MMP_like, Zinc-dependent metalloprotease, MMP_like
subfamily. This group contains matrix metalloproteinases
(MMPs), serralysins, and the astacin_like family of
proteases.
Length = 165
Score = 26.7 bits (59), Expect = 6.8
Identities = 17/58 (29%), Positives = 23/58 (39%), Gaps = 1/58 (1%)
Query: 101 LSHYFIASSHNTYLTGHQLKG-ESSVDLYSQFISDYNGEDHYFTRIGPGGLLNLDKIY 157
L H F AS + + KG SSV Y+ D IGP + + K+Y
Sbjct: 108 LRHNFAASDRDDNVDLLAEKGDTSSVMDYAPSNFSIQLGDGQKYTIGPYDIAAIKKLY 165
Database: CDD.v3.10
Posted date: Mar 20, 2013 7:55 AM
Number of letters in database: 10,937,602
Number of sequences in database: 44,354
Lambda K H
0.322 0.137 0.423
Gapped
Lambda K H
0.267 0.0782 0.140
Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 44354
Number of Hits to DB: 10,005,774
Number of extensions: 903795
Number of successful extensions: 607
Number of sequences better than 10.0: 1
Number of HSP's gapped: 607
Number of HSP's successfully gapped: 42
Length of query: 197
Length of database: 10,937,602
Length adjustment: 92
Effective length of query: 105
Effective length of database: 6,857,034
Effective search space: 719988570
Effective search space used: 719988570
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.4 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.9 bits)
S2: 56 (25.2 bits)