RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy8929
(160 letters)
>gnl|CDD|241429 cd13275, PH_M-RIP, Myosin phosphatase-RhoA Interacting Protein
Pleckstrin homology (PH) domain. M-RIP is proposed to
play a role in myosin phosphatase regulation by RhoA.
M-RIP contains 2 PH domains followed by a Rho binding
domain (Rho-BD), and a C-terminal myosin binding subunit
(MBS) binding domain (MBS-BD). The amino terminus of
M-RIP with its adjacent PH domains and polyproline
motifs mediates binding to both actin and Galpha. M-RIP
brings RhoA and MBS into close proximity where M-RIP can
target RhoA to the myosin phosphatase complex to
regulate the myosin phosphorylation state. M-RIP does
this via its C-terminal coiled-coil domain which
interacts with the MBS leucine zipper domain of myosin
phosphatase, while its Rho-BD, directly binds RhoA in a
nucleotide-independent manner. PH domains have diverse
functions, but in general are involved in targeting
proteins to the appropriate cellular location or in the
interaction with a binding partner. They share little
sequence conservation, but all have a common fold, which
is electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 103
Score = 142 bits (361), Expect = 6e-45
Identities = 51/88 (57%), Positives = 66/88 (75%)
Query: 62 WTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITTWDSKRT 121
W KHWFVLR SL YYRD AEE+G LDGV+ L+ T+++E+PV RN+GFQI TWD KR
Sbjct: 14 WKKHWFVLRDASLRYYRDSVAEEAGELDGVIDLSTCTNVTELPVQRNYGFQIKTWDGKRY 73
Query: 122 ILSAVTAGIRNNWMSAIKRTAAMSLLDD 149
+LSA+T+GIR NW+ AI++ A + D
Sbjct: 74 VLSAMTSGIRRNWIQAIRKAAGLPSTPD 101
>gnl|CDD|214574 smart00233, PH, Pleckstrin homology domain. Domain commonly found
in eukaryotic signalling proteins. The domain family
possesses multiple functions including the abilities to
bind inositol phosphates, and various proteins. PH
domains have been found to possess inserted domains
(such as in PLC gamma, syntrophins) and to be inserted
within other domains. Mutations in Brutons tyrosine
kinase (Btk) within its PH domain cause X-linked
agammaglobulinaemia (XLA) in patients. Point mutations
cluster into the positively charged end of the molecule
around the predicted binding site for
phosphatidylinositol lipids.
Length = 102
Score = 64.1 bits (156), Expect = 4e-14
Identities = 25/86 (29%), Positives = 42/86 (48%), Gaps = 3/86 (3%)
Query: 61 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVT---SLSEVPVARNFGFQITTWD 117
+W K +FVL +LLYY+ K ++S G + L+ T + + F+I T D
Sbjct: 17 SWKKRYFVLFNSTLLYYKSKKDKKSYKPKGSIDLSGCTVREAPDPDSSKKPHCFEIKTSD 76
Query: 118 SKRTILSAVTAGIRNNWMSAIKRTAA 143
K +L A + R W+ A+++ A
Sbjct: 77 RKTLLLQAESEEEREKWVEALRKAIA 102
Score = 53.3 bits (128), Expect = 4e-10
Identities = 19/71 (26%), Positives = 33/71 (46%), Gaps = 3/71 (4%)
Query: 3 NKKHTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVT---SLSEVPVARNFGFQI 59
K +W K +FVL +LLYY+ K ++S G + L+ T + + F+I
Sbjct: 13 GGKKSWKKRYFVLFNSTLLYYKSKKDKKSYKPKGSIDLSGCTVREAPDPDSSKKPHCFEI 72
Query: 60 TTWTKHWFVLR 70
T + +L+
Sbjct: 73 KTSDRKTLLLQ 83
>gnl|CDD|241231 cd00821, PH, Pleckstrin homology (PH) domain. PH domains have
diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They share
little sequence conservation, but all have a common
fold, which is electrostatically polarized. Less than
10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 92
Score = 53.5 bits (128), Expect = 3e-10
Identities = 23/84 (27%), Positives = 38/84 (45%), Gaps = 3/84 (3%)
Query: 56 GFQITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPV-ARNFGFQIT 114
G + +W K WFVL LLYY+ K + S G++ L++ + V + F++
Sbjct: 10 GKGLKSWKKRWFVLFDDVLLYYKSKK-DSSKKPKGLIPLSDGLEVELVSSSGKPNCFELV 68
Query: 115 T-WDSKRTILSAVTAGIRNNWMSA 137
T + L A + R W+ A
Sbjct: 69 TPDRGRTYYLQAESEEEREEWLEA 92
Score = 42.7 bits (100), Expect = 4e-06
Identities = 17/60 (28%), Positives = 28/60 (46%), Gaps = 2/60 (3%)
Query: 3 NKKHTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPV-ARNFGFQITT 61
+W K WFVL LLYY+ K + S G++ L++ + V + F++ T
Sbjct: 11 KGLKSWKKRWFVLFDDVLLYYKSKK-DSSKKPKGLIPLSDGLEVELVSSSGKPNCFELVT 69
>gnl|CDD|215766 pfam00169, PH, PH domain. PH stands for pleckstrin homology.
Length = 101
Score = 53.6 bits (129), Expect = 4e-10
Identities = 25/86 (29%), Positives = 37/86 (43%), Gaps = 4/86 (4%)
Query: 61 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVT---SLSEVPVARNFGFQITTWD 117
+W K +FVL LLYY+D K + S G + L+ R F+I T D
Sbjct: 17 SWKKRYFVLFDGVLLYYKDSK-KSSSRPKGSIPLSGCQVTKVPDSEDGKRKNCFEIRTGD 75
Query: 118 SKRTILSAVTAGIRNNWMSAIKRTAA 143
+ +L A + R W+ AI+
Sbjct: 76 RETFLLQAESEEERKEWVKAIRSAIR 101
Score = 41.7 bits (98), Expect = 1e-05
Identities = 18/70 (25%), Positives = 26/70 (37%), Gaps = 6/70 (8%)
Query: 3 NKKHTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVT---SLSEVPVARNFGFQI 59
+ +W K +FVL LLYY+D K + S G + L+ R F+I
Sbjct: 13 GGRKSWKKRYFVLFDGVLLYYKDSK-KSSSRPKGSIPLSGCQVTKVPDSEDGKRKNCFEI 71
Query: 60 TT--WTKHWF 67
T
Sbjct: 72 RTGDRETFLL 81
>gnl|CDD|241369 cd13215, PH-GRAM1_AGT26, Autophagy-related protein 26/Sterol
3-beta-glucosyltransferase Pleckstrin homology (PH)
domain, repeat 1. ATG26 (also called
UGT51/UDP-glycosyltransferase 51), a member of the
glycosyltransferase 28 family, resulting in the
biosynthesis of sterol glucoside. ATG26 in decane
metabolism and autophagy. There are 32 known
autophagy-related (ATG) proteins, 17 are components of
the core autophagic machinery essential for all
autophagy-related pathways and 15 are the additional
components required only for certain pathways or
species. The core autophagic machinery includes 1) the
ATG9 cycling system (ATG1, ATG2, ATG9, ATG13, ATG18, and
ATG27), 2) the phosphatidylinositol 3-kinase complex
(ATG6/VPS30, ATG14, VPS15, and ATG34), and 3) the
ubiquitin-like protein system (ATG3, ATG4, ATG5, ATG7,
ATG8, ATG10, ATG12, and ATG16). Less is known about how
the core machinery is adapted or modulated with
additional components to accommodate the nonselective
sequestration of bulk cytosol (autophagosome formation)
or selective sequestration of specific cargos (Cvt
vesicle, pexophagosome, or bacteria-containing
autophagosome formation). The pexophagosome-specific
additions include the ATG30-ATG11-ATG17
receptor-adaptors complex, the coiled-coil protein
ATG25, and the sterol glucosyltransferase ATG26. ATG26
is necessary for the degradation of medium peroxisomes.
It contains 2 GRAM domains and a single PH domain. PH
domains are only found in eukaryotes. They share little
sequence conservation, but all have a common fold, which
is electrostatically polarized. PH domains also have
diverse functions. They are often involved in targeting
proteins to the plasma membrane, but few display strong
specificity in lipid binding. Any specificity is usually
determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 130
Score = 50.6 bits (122), Expect = 9e-09
Identities = 20/86 (23%), Positives = 35/86 (40%), Gaps = 14/86 (16%)
Query: 62 WTKHWFVLRGCSLLYYRDPKAEESGVLD-----GVVALNNVTSLSEVPVARN-FGFQITT 115
+ ++WFVL+G L +YR D G + L S + F+ITT
Sbjct: 45 YNRYWFVLKGDVLSWYRSST-------DLYFPHGTIDLRYGISAEITDKDKETTHFKITT 97
Query: 116 WDSKRTILSAVTAGIRNNWMSAIKRT 141
+S+ A + W+ A+++
Sbjct: 98 -NSRTYTFKADSEPSAKEWVKALQKV 122
Score = 41.8 bits (99), Expect = 1e-05
Identities = 18/70 (25%), Positives = 28/70 (40%), Gaps = 17/70 (24%)
Query: 2 LNKKHT----WTKHWFVLRGCSLLYYRDPKAEESGVLD-----GVVALNNVTSLSEVPVA 52
L+K+ + ++WFVL+G L +YR D G + L S
Sbjct: 35 LSKRGKRTPRYNRYWFVLKGDVLSWYRSST-------DLYFPHGTIDLRYGISAEITDKD 87
Query: 53 RN-FGFQITT 61
+ F+ITT
Sbjct: 88 KETTHFKITT 97
>gnl|CDD|241402 cd13248, PH_PEPP1_2_3, Phosphoinositol 3-phosphate binding proteins
1, 2, and 3 pleckstrin homology (PH) domain. PEPP1
(also called PLEKHA4/PH domain-containing family A
member 4 and RHOXF1/Rhox homeobox family member 1), and
related homologs PEPP2 (also called PLEKHA5/PH
domain-containing family A member 5) and PEPP3 (also
called PLEKHA6/PH domain-containing family A member 6),
have PH domains that interact specifically with
PtdIns(3,4)P3. Other proteins that bind PtdIns(3,4)P3
specifically are: TAPP1 (tandem PH-domain-containing
protein-1) and TAPP2], PtdIns3P AtPH1, and Ptd-
Ins(3,5)P2 (centaurin-beta2). All of these proteins
contain at least 5 of the 6 conserved amino acids that
make up the putative phosphatidylinositol 3,4,5-
trisphosphate-binding motif (PPBM) located at their
N-terminus. PH domains have diverse functions, but in
general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 104
Score = 47.6 bits (114), Expect = 6e-08
Identities = 25/84 (29%), Positives = 37/84 (44%), Gaps = 6/84 (7%)
Query: 62 WTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVT---SLSEVPVARNFGFQITTWDS 118
W K WFVL+ L YY+DP+ E+ L G + L + T + + R F F+
Sbjct: 24 WKKRWFVLKDNCLYYYKDPEEEK--AL-GSILLPSYTISPASPSDEINRKFAFKAEHAGM 80
Query: 119 KRTILSAVTAGIRNNWMSAIKRTA 142
+ +A T WM A+ A
Sbjct: 81 RTYYFAADTQEEMEQWMKALSLAA 104
Score = 41.1 bits (97), Expect = 2e-05
Identities = 19/56 (33%), Positives = 28/56 (50%), Gaps = 6/56 (10%)
Query: 8 WTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVT---SLSEVPVARNFGFQIT 60
W K WFVL+ L YY+DP+ E+ L G + L + T + + R F F+
Sbjct: 24 WKKRWFVLKDNCLYYYKDPEEEK--AL-GSILLPSYTISPASPSDEINRKFAFKAE 76
>gnl|CDD|241426 cd13272, PH_INPP4A_INPP4B, Type I inositol 3,4-bisphosphate
4-phosphatase and Type II inositol 3,4-bisphosphate
4-phosphatase Pleckstrin homology (PH) domain. INPP4A
(also called Inositol polyphosphate 4-phosphatase type
I) and INPP4B (also called Inositol polyphosphate
4-phosphatase type II) both catalyze the hydrolysis of
the 4-position phosphate of phosphatidylinositol
3,4-bisphosphate and inositol 1,3,4-trisphosphate. They
differ in that INPP4A additionally catalyzes the
hydrolysis of the 4-position phosphate of inositol
3,4-bisphosphate, while INPP4B catalyzes the hydrolysis
of the 4-position phosphate of inositol
1,4-bisphosphate. They both have a single PH domain
followed by a C2 domain. PH domains have diverse
functions, but in general are involved in targeting
proteins to the appropriate cellular location or in the
interaction with a binding partner. They share little
sequence conservation, but all have a common fold, which
is electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 116
Score = 47.6 bits (114), Expect = 8e-08
Identities = 24/78 (30%), Positives = 34/78 (43%), Gaps = 2/78 (2%)
Query: 63 TKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITTWDSKRTI 122
+ WF LRG L Y++ S GV+ L N E P F F + D K+
Sbjct: 16 KERWFKLRGNLLFYFKS-NEPGSEPA-GVIVLENCRVQREEPDPGGFAFSLVFKDEKKYR 73
Query: 123 LSAVTAGIRNNWMSAIKR 140
S + R+ W+ AIK+
Sbjct: 74 FSCRSEEERDEWIEAIKQ 91
Score = 28.4 bits (64), Expect = 0.75
Identities = 16/52 (30%), Positives = 21/52 (40%), Gaps = 2/52 (3%)
Query: 9 TKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQIT 60
+ WF LRG L Y++ S GV+ L N E P F F +
Sbjct: 16 KERWFKLRGNLLFYFKS-NEPGSEPA-GVIVLENCRVQREEPDPGGFAFSLV 65
>gnl|CDD|241436 cd13282, PH1_PLEKHH1_PLEKHH2, Pleckstrin homology (PH) domain
containing, family H (with MyTH4 domain) members 1 and 2
(PLEKHH1) PH domain, repeat 1. PLEKHH1 and PLEKHH2
(also called PLEKHH1L) are thought to function in
phospholipid binding and signal transduction. There are
3 Human PLEKHH genes: PLEKHH1, PLEKHH2, and PLEKHH3.
There are many isoforms, the longest of which contain a
FERM domain, a MyTH4 domain, two PH domains, a peroximal
domain, a vacuolar domain, and a coiled coil stretch.
The FERM domain has a cloverleaf tripart structure
(FERM_N, FERM_M, FERM_C/N, alpha-, and C-lobe/A-lobe,
B-lobe, C-lobe/F1, F2, F3). The C-lobe/F3 within the
FERM domain is part of the PH domain family. PH domains
have diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They share
little sequence conservation, but all have a common
fold, which is electrostatically polarized. Less than
10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 96
Score = 46.5 bits (111), Expect = 2e-07
Identities = 25/84 (29%), Positives = 37/84 (44%), Gaps = 6/84 (7%)
Query: 56 GFQITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITT 115
G ++ TW + WFVL+ L YY+ P G +AL+ S F+I T
Sbjct: 9 GGKVKTWKRRWFVLKNGELFYYKSPNDVIRKPQ-GQIALD--GSCEIARAEGAQTFEIVT 65
Query: 116 WDSKRT-ILSAVTAGIRNNWMSAI 138
KRT L+A + + W+ I
Sbjct: 66 --EKRTYYLTADSENDLDEWIRVI 87
Score = 37.3 bits (87), Expect = 4e-04
Identities = 19/63 (30%), Positives = 26/63 (41%), Gaps = 4/63 (6%)
Query: 7 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITTWTKHW 66
TW + WFVL+ L YY+ P G +AL+ S F+I T K
Sbjct: 14 TWKRRWFVLKNGELFYYKSPNDVIRKPQ-GQIALD--GSCEIARAEGAQTFEIVT-EKRT 69
Query: 67 FVL 69
+ L
Sbjct: 70 YYL 72
>gnl|CDD|241427 cd13273, PH_SWAP-70, Switch-associated protein-70 Pleckstrin
homology (PH) domain. SWAP-70 (also called
Differentially expressed in FDCP 6/DEF-6 or IRF4-binding
protein) functions in cellular signal transduction
pathways (in conjunction with Rac), regulates cell
motility through actin rearrangement, and contributes to
the transformation and invasion activity of mouse embryo
fibroblasts. Metazoan SWAP-70 is found in B lymphocytes,
mast cells, and in a variety of organs. Metazoan SWAP-70
contains an N-terminal EF-hand motif, a centrally
located PH domain, and a C-terminal coiled-coil domain.
The PH domain of Metazoan SWAP-70 contains a
phosphoinositide-binding site and a nuclear localization
signal (NLS), which localize SWAP-70 to the plasma
membrane and nucleus, respectively. The NLS is a
sequence of four Lys residues located at the N-terminus
of the C-terminal a-helix; this is a unique
characteristic of the Metazoan SWAP-70 PH domain. The
SWAP-70 PH domain binds PtdIns(3,4,5)P3 and
PtdIns(4,5)P2 embedded in lipid bilayer vesicles. There
are additional plant SWAP70 proteins, but these are not
included in this hierarchy. Rice SWAP70 (OsSWAP70)
exhibits GEF activity toward the its Rho GTPase, OsRac1,
and regulates chitin-induced production of reactive
oxygen species and defense gene expression in rice.
Arabidopsis SWAP70 (AtSWAP70) plays a role in both PAMP-
and effector-triggered immunity. Plant SWAP70 contains
both DH and PH domains, but their arrangement is the
reverse of that in typical DH-PH-type Rho GEFs, wherein
the DH domain is flanked by a C-terminal PH domain. PH
domains have diverse functions, but in general are
involved in targeting proteins to the appropriate
cellular location or in the interaction with a binding
partner. They share little sequence conservation, but
all have a common fold, which is electrostatically
polarized. Less than 10% of PH domains bind
phosphoinositide phosphates (PIPs) with high affinity
and specificity. PH domains are distinguished from other
PIP-binding domains by their specific high-affinity
binding to PIPs with two vicinal phosphate groups:
PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which
results in targeting some PH domain proteins to the
plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 110
Score = 44.6 bits (106), Expect = 1e-06
Identities = 29/94 (30%), Positives = 44/94 (46%), Gaps = 10/94 (10%)
Query: 56 GFQITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNN---VTSLSEVPVARNFGFQ 112
G + TW + WFVL+ SL YY+ +E G +AL++ V SL + + F
Sbjct: 18 GHLLPTWRERWFVLKPNSLSYYKSEDLKEK---KGEIALDSNCCVESLPDREGKKCR-FC 73
Query: 113 ITTWDSKRTI-LSAVTAGIRNNWMSAIKRTAAMS 145
+ T +T LSA R W+ AI+ +S
Sbjct: 74 VKT--PDKTYELSASDHKTRQEWIQAIQTAIRLS 105
Score = 35.0 bits (81), Expect = 0.004
Identities = 12/29 (41%), Positives = 16/29 (55%), Gaps = 3/29 (10%)
Query: 1 MLNKKH---TWTKHWFVLRGCSLLYYRDP 26
+ K H TW + WFVL+ SL YY+
Sbjct: 14 LWKKGHLLPTWRERWFVLKPNSLSYYKSE 42
>gnl|CDD|241435 cd13281, PH_PLEKHD1, Pleckstrin homology (PH) domain containing,
family D (with coiled-coil domains) member 1 PH domain.
Human PLEKHD1 (also called UPF0639, pleckstrin homology
domain containing, family D (with M protein repeats)
member 1) is a single transcript and contains a single
PH domain. PLEKHD1 is conserved in human, chimpanzee, ,
dog, cow, mouse, chicken, zebrafish, and Caenorhabditis
elegans. PH domains have diverse functions, but in
general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 139
Score = 45.0 bits (107), Expect = 1e-06
Identities = 30/103 (29%), Positives = 51/103 (49%), Gaps = 8/103 (7%)
Query: 45 SLSEVPVARNFGFQITTWTKHWFVLRGCSLLYYRDPKA---EESGVLD----GVVALNNV 97
LS V R FG Q W+K +FVL+ C LLYY + + E++ + GV+ L
Sbjct: 13 QLSGVLWKRPFGRQSAKWSKRFFVLKECFLLYYAESEKKDFEKTRRFNIHPKGVIPLGGC 72
Query: 98 TSLSEVPVARNFGFQITTWDSKRTI-LSAVTAGIRNNWMSAIK 139
+ + R + F I+ D K +I L+A + + +W+ ++
Sbjct: 73 SIEAGRDPGRPYCFLISHPDFKGSIILAADSEEEQESWLDMLR 115
Score = 33.9 bits (78), Expect = 0.013
Identities = 17/61 (27%), Positives = 30/61 (49%), Gaps = 7/61 (11%)
Query: 7 TWTKHWFVLRGCSLLYYRDPKA---EESGVLD----GVVALNNVTSLSEVPVARNFGFQI 59
W+K +FVL+ C LLYY + + E++ + GV+ L + + R + F I
Sbjct: 29 KWSKRFFVLKECFLLYYAESEKKDFEKTRRFNIHPKGVIPLGGCSIEAGRDPGRPYCFLI 88
Query: 60 T 60
+
Sbjct: 89 S 89
>gnl|CDD|241409 cd13255, PH_TAAP2-like, Tandem PH-domain-containing protein 2
Pleckstrin homology (PH) domain. The binding of TAPP2
(also called PLEKHA2) adaptors to PtdIns(3,4)P(2), but
not PI(3,4, 5)P3, function as negative regulators of
insulin and PI3K signalling pathways (i.e.
TAPP/utrophin/syntrophin complex). TAPP2 contains two
sequential PH domains in which the C-terminal PH domain
specifically binds PtdIns(3,4)P2 with high affinity. The
N-terminal PH domain does not interact with any
phosphoinositide tested. They also contain a C-terminal
PDZ-binding motif that interacts with several
PDZ-binding proteins, including PTPN13 (known previously
as PTPL1 or FAP-1) as well as the scaffolding proteins
MUPP1 (multiple PDZ-domain-containing protein 1),
syntrophin and utrophin. The members here are most
sequence similar to TAPP2 proteins, but may not be
actual TAPP2 proteins. PH domains have diverse
functions, but in general are involved in targeting
proteins to the appropriate cellular location or in the
interaction with a binding partner. They share little
sequence conservation, but all have a common fold, which
is electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 110
Score = 43.2 bits (102), Expect = 3e-06
Identities = 30/97 (30%), Positives = 49/97 (50%), Gaps = 9/97 (9%)
Query: 61 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARN-FGFQITTWDSK 119
TW K WFVLR L YY++ K E +L ++ L ++ + +EV + ++ F I T
Sbjct: 21 TWKKRWFVLRPTKLAYYKNDK--EYRLLR-LIDLTDIHTCTEVQLKKHDNTFGIVT--PA 75
Query: 120 RTI-LSAVTAGIRNNWMSAIKRTAAMSLLDDKASPSS 155
RT + A + +W+SAI A L +P++
Sbjct: 76 RTFYVQADSKAEMESWISAINL--ARQALRATITPNT 110
Score = 34.7 bits (80), Expect = 0.005
Identities = 12/24 (50%), Positives = 16/24 (66%)
Query: 4 KKHTWTKHWFVLRGCSLLYYRDPK 27
++ TW K WFVLR L YY++ K
Sbjct: 18 RRKTWKKRWFVLRPTKLAYYKNDK 41
>gnl|CDD|241452 cd13298, PH1_PH_fungal, Fungal proteins Pleckstrin homology (PH)
domain, repeat 1. The functions of these fungal
proteins are unknown, but they all contain 2 PH domains.
This cd represents the first PH repeat. PH domains have
diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They share
little sequence conservation, but all have a common
fold, which is electrostatically polarized. Less than
10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 106
Score = 43.0 bits (102), Expect = 4e-06
Identities = 22/85 (25%), Positives = 39/85 (45%), Gaps = 5/85 (5%)
Query: 61 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITTWDSKR 120
TW K WFVLR C L YY+D +E + V+ L+ +T+++ + + + +
Sbjct: 21 TWKKRWFVLRPCQLSYYKD--EKEYKLRR-VINLSELTAVAPLKDKK-RKNVFAIYTPSK 76
Query: 121 TI-LSAVTAGIRNNWMSAIKRTAAM 144
A + N W+ AI+ +
Sbjct: 77 NYHFQASSEKDANEWVEAIREESRS 101
Score = 42.2 bits (100), Expect = 7e-06
Identities = 22/68 (32%), Positives = 36/68 (52%), Gaps = 4/68 (5%)
Query: 4 KKHTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVAR-NFGFQITTW 62
K TW K WFVLR C L YY+D +E + V+ L+ +T+++ + + F I T
Sbjct: 18 KTKTWKKRWFVLRPCQLSYYKD--EKEYKLRR-VINLSELTAVAPLKDKKRKNVFAIYTP 74
Query: 63 TKHWFVLR 70
+K++
Sbjct: 75 SKNYHFQA 82
>gnl|CDD|241433 cd13279, PH_Cla4_Ste20, Pleckstrin homology (PH) domain. Budding
yeast contain two main p21-activated kinases (PAKs),
Cla4 and Ste20. The yeast Ste20 protein kinase is
involved in pheromone response, though the function of
Ste20 mammalian homologs is unknown. Cla4 is involved in
budding and cytokinesis and interacts with Cdc42, a
GTPase required for polarized cell growth as is Pak.
Cla4 and Ste20 kinases share a function in localizing
cell growth with respect to the septin ring. They both
contain a PH domain, a Cdc42/Rac interactive binding
(CRIB) domain, and a C-terminal Protein Kinase catalytic
(PKc) domain. PH domains have diverse functions, but in
general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 91
Score = 42.2 bits (100), Expect = 5e-06
Identities = 19/71 (26%), Positives = 34/71 (47%), Gaps = 4/71 (5%)
Query: 56 GFQITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITT 115
G W+K + VLR SL +Y K E S + L +++++S + + F+I
Sbjct: 13 GLLSFRWSKRYLVLREQSLDFY---KNESSSSASLSIPLKDISNVSRTD-LKPYCFEIVR 68
Query: 116 WDSKRTILSAV 126
S ++I +V
Sbjct: 69 KSSTKSIYISV 79
Score = 36.8 bits (86), Expect = 5e-04
Identities = 17/64 (26%), Positives = 31/64 (48%), Gaps = 6/64 (9%)
Query: 7 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITT--WTK 64
W+K + VLR SL +Y K E S + L +++++S + + F+I TK
Sbjct: 18 RWSKRYLVLREQSLDFY---KNESSSSASLSIPLKDISNVSRTD-LKPYCFEIVRKSSTK 73
Query: 65 HWFV 68
++
Sbjct: 74 SIYI 77
>gnl|CDD|241430 cd13276, PH_AtPH1, Arabidopsis thaliana Pleckstrin homolog (PH) 1
(AtPH1) PH domain. AtPH1 is expressed in all plant
tissue and is proposed to be the plant homolog of human
pleckstrin. Pleckstrin consists of two PH domains
separated by a linker region, while AtPH has a single PH
domain with a short N-terminal extension. AtPH1 binds
PtdIns3P specifically and is thought to be an adaptor
molecule since it has no obvious catalytic functions. PH
domains have diverse functions, but in general are
involved in targeting proteins to the appropriate
cellular location or in the interaction with a binding
partner. They share little sequence conservation, but
all have a common fold, which is electrostatically
polarized. Less than 10% of PH domains bind
phosphoinositide phosphates (PIPs) with high affinity
and specificity. PH domains are distinguished from other
PIP-binding domains by their specific high-affinity
binding to PIPs with two vicinal phosphate groups:
PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which
results in targeting some PH domain proteins to the
plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 117
Score = 42.3 bits (100), Expect = 9e-06
Identities = 24/84 (28%), Positives = 41/84 (48%), Gaps = 5/84 (5%)
Query: 59 ITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLS--EVPVARNFGFQITTW 116
I TW + WFVL+ L Y++D GV+ L++ ++ E + F F+++T
Sbjct: 20 IKTWRRRWFVLKQGKLFYFKDED--PDSEPRGVIDLSDCLTVKSAEEATNKEFAFEVSTP 77
Query: 117 DSKRTILSAVTAGIRNNWMSAIKR 140
+ L A + + W+SAI R
Sbjct: 78 ERTF-YLIADSEKEKEEWISAIGR 100
Score = 38.1 bits (89), Expect = 3e-04
Identities = 16/63 (25%), Positives = 32/63 (50%), Gaps = 4/63 (6%)
Query: 7 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLS--EVPVARNFGFQITTWTK 64
TW + WFVL+ L Y++D GV+ L++ ++ E + F F+++T +
Sbjct: 22 TWRRRWFVLKQGKLFYFKDED--PDSEPRGVIDLSDCLTVKSAEEATNKEFAFEVSTPER 79
Query: 65 HWF 67
++
Sbjct: 80 TFY 82
>gnl|CDD|241294 cd01263, PH_anillin, Anillin Pleckstrin homology (PH) domain.
Anillin (Rhotekin/RTKN; also called PLEKHK/Pleckstrin
homology domain-containing family K) is an actin binding
protein involved in cytokinesis. It interacts with
GTP-bound Rho proteins and results in the inhibition of
their GTPase activity. Dysregulation of the Rho signal
transduction pathway has been implicated in many forms
of cancer. Anillin proteins have a N-terminal HRI
domain/ACC (anti-parallel coiled-coil) finger domain or
Rho-binding domain binds small GTPases from the Rho
family. The C-terminal PH domain helps target anillin to
ectopic septin containing foci. PH domains have diverse
functions, but in general are involved in targeting
proteins to the appropriate cellular location or in the
interaction with a binding partner. They share little
sequence conservation, but all have a common fold, which
is electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 119
Score = 41.9 bits (99), Expect = 1e-05
Identities = 28/99 (28%), Positives = 42/99 (42%), Gaps = 15/99 (15%)
Query: 60 TTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPV-----ARNFGFQIT 114
W + W VLRG L +++ P+ EE G + L + P AR F++
Sbjct: 18 GAWHRRWCVLRGGYLSFWKYPEDEEKKKPIGSIDLRKCINEKVEPASRELCARPNTFELE 77
Query: 115 TW----------DSKRTILSAVTAGIRNNWMSAIKRTAA 143
T + KR +LSA T R W+ A+ +T A
Sbjct: 78 TLRPAEDSDGTNEKKRVLLSADTKEERIEWLDALNQTLA 116
Score = 32.3 bits (74), Expect = 0.040
Identities = 14/50 (28%), Positives = 22/50 (44%)
Query: 6 HTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNF 55
W + W VLRG L +++ P+ EE G + L + P +R
Sbjct: 18 GAWHRRWCVLRGGYLSFWKYPEDEEKKKPIGSIDLRKCINEKVEPASREL 67
>gnl|CDD|241417 cd13263, PH_RhoGap25-like, Rho GTPase activating protein 25 and
related proteins Pleckstrin homology (PH) domain.
RhoGAP25 (also called ArhGap25) like other RhoGaps are
involved in cell polarity, cell morphology and
cytoskeletal organization. They act as GTPase activators
for the Rac-type GTPases by converting them to an
inactive GDP-bound state and control actin remodeling by
inactivating Rac downstream of Rho leading to suppress
leading edge protrusion and promotes cell retraction to
achieve cellular polarity and are able to suppress RAC1
and CDC42 activity in vitro. Overexpression of these
proteins induces cell rounding with partial or complete
disruption of actin stress fibers and formation of
membrane ruffles, lamellipodia, and filopodia. This
hierarchy contains RhoGAP22, RhoGAP24, and RhoGAP25.
Members here contain an N-terminal PH domain followed by
a RhoGAP domain and either a BAR or TATA Binding Protein
(TBP) Associated Factor 4 (TAF4) domain. PH domains have
diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They share
little sequence conservation, but all have a common
fold, which is electrostatically polarized. Less than
10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 114
Score = 41.2 bits (97), Expect = 2e-05
Identities = 27/92 (29%), Positives = 41/92 (44%), Gaps = 16/92 (17%)
Query: 61 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPV----ARNFGFQIT-- 114
W + WFVLRG L YY+D +ES G + L T + E+P F F+I
Sbjct: 18 NWQRRWFVLRGDQLYYYKDE--DESKPQ-GCIPLPGNT-VKELPFNPEEPGKFLFEIIPG 73
Query: 115 TWDSKRT------ILSAVTAGIRNNWMSAIKR 140
++R+ +L A + W+ I+R
Sbjct: 74 DGGTRRSANHDSYLLMANSQAEMEEWVKVIRR 105
Score = 35.0 bits (81), Expect = 0.004
Identities = 18/44 (40%), Positives = 24/44 (54%), Gaps = 4/44 (9%)
Query: 7 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVP 50
W + WFVLRG L YY+D +ES G + L T + E+P
Sbjct: 18 NWQRRWFVLRGDQLYYYKDE--DESKPQ-GCIPLPGNT-VKELP 57
>gnl|CDD|241296 cd01265, PH_TBC1D2A, TBC1 domain family member 2A pleckstrin
homology (PH) domain. TBC1D2A (also called
PARIS-1/Prostate antigen recognized and identified by
SEREX 1 and ARMUS) contains a PH domain and a TBC-type
GTPase catalytic domain. TBC1D2A integrates signaling
between Arf6, Rac1, and Rab7 during junction
disassembly. Activated Rac1 recruits TBC1D2A to locally
inactivate Rab7 via its C-terminal TBC/RabGAP domain and
facilitate E-cadherin degradation in lysosomes. The
TBC1D2A PH domain mediates localization at cell-cell
contacts and coprecipitates with cadherin complexes. PH
domains have diverse functions, but in general are
involved in targeting proteins to the appropriate
cellular location or in the interaction with a binding
partner. They share little sequence conservation, but
all have a common fold, which is electrostatically
polarized. Less than 10% of PH domains bind
phosphoinositide phosphates (PIPs) with high affinity
and specificity. PH domains are distinguished from other
PIP-binding domains by their specific high-affinity
binding to PIPs with two vicinal phosphate groups:
PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which
results in targeting some PH domain proteins to the
plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 101
Score = 40.7 bits (96), Expect = 2e-05
Identities = 25/86 (29%), Positives = 34/86 (39%), Gaps = 9/86 (10%)
Query: 59 ITTWTKHWFVL--RGCSLLYYRDPK-AEESGVLDGVVALNNVTSLSEVPVARNFGFQITT 115
+ TW WFV R C L YYR P+ G +D A + S P A F+I T
Sbjct: 15 LKTWKSRWFVFDERKCQLYYYRSPQDITPLGSIDLSGA-----AFSYDPEAEKGTFEIHT 69
Query: 116 WDSKRTILSAVTAGIRNNWMSAIKRT 141
+ IL A W+ ++
Sbjct: 70 -PGRVYILKASDRQAMLYWLQELQSK 94
Score = 34.9 bits (81), Expect = 0.003
Identities = 21/58 (36%), Positives = 25/58 (43%), Gaps = 8/58 (13%)
Query: 7 TWTKHWFVL--RGCSLLYYRDPK-AEESGVLDGVVALNNVTSLSEVPVARNFGFQITT 61
TW WFV R C L YYR P+ G +D A + S P A F+I T
Sbjct: 17 TWKSRWFVFDERKCQLYYYRSPQDITPLGSIDLSGA-----AFSYDPEAEKGTFEIHT 69
>gnl|CDD|241404 cd13250, PH_ACAP, ArfGAP with coiled-coil, ankyrin repeat and PH
domains Pleckstrin homology (PH) domain. ACAP (also
called centaurin beta) functions both as a Rab35
effector and as an Arf6-GTPase-activating protein (GAP)
by which it controls actin remodeling and membrane
trafficking. ACAP contain an NH2-terminal
bin/amphiphysin/Rvs (BAR) domain, a phospholipid-binding
domain, a PH domain, a GAP domain, and four ankyrin
repeats. The AZAPs constitute a family of Arf GAPs that
are characterized by an NH2-terminal pleckstrin homology
(PH) domain and a central Arf GAP domain followed by two
or more ankyrin repeats. On the basis of sequence and
domain organization, the AZAP family is further
subdivided into four subfamilies: 1) the ACAPs contain
an NH2-terminal bin/amphiphysin/Rvs (BAR) domain (a
phospholipid-binding domain that is thought to sense
membrane curvature), a single PH domain followed by the
GAP domain, and four ankyrin repeats; 2) the ASAPs also
contain an NH2-terminal BAR domain, the tandem PH
domain/GAP domain, three ankyrin repeats, two
proline-rich regions, and a COOH-terminal Src homology 3
domain; 3) the AGAPs contain an NH2-terminal GTPase-like
domain (GLD), a split PH domain, and the GAP domain
followed by four ankyrin repeats; and 4) the ARAPs
contain both an Arf GAP domain and a Rho GAP domain, as
well as an NH2-terminal sterile-a motif (SAM), a
proline-rich region, a GTPase-binding domain, and five
PH domains. PMID 18003747 and 19055940 Centaurin can
bind to phosphatidlyinositol (3,4,5)P3. PH domains have
diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They share
little sequence conservation, but all have a common
fold, which is electrostatically polarized. Less than
10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 98
Score = 40.7 bits (96), Expect = 2e-05
Identities = 22/86 (25%), Positives = 41/86 (47%), Gaps = 3/86 (3%)
Query: 61 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITTWDSKR 120
TW + WF ++ L+Y + K + V+ + L V + + R F F++ + +K
Sbjct: 15 TWKRRWFSIQNGQLVYQKRFKKDTPTVVVEDLRLCTVKPCED--IDRRFCFEVVS-PTKS 71
Query: 121 TILSAVTAGIRNNWMSAIKRTAAMSL 146
+L A + R W+ AI+ A +L
Sbjct: 72 YMLQAESEEDRQAWIQAIQAAIASAL 97
Score = 31.0 bits (71), Expect = 0.081
Identities = 18/71 (25%), Positives = 34/71 (47%), Gaps = 3/71 (4%)
Query: 3 NKKHTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITTW 62
N TW + WF ++ L+Y + K + V+ + L V + + R F F++ +
Sbjct: 11 NAFKTWKRRWFSIQNGQLVYQKRFKKDTPTVVVEDLRLCTVKPCED--IDRRFCFEVVSP 68
Query: 63 TKHWFVLRGCS 73
TK ++L+ S
Sbjct: 69 TKS-YMLQAES 78
>gnl|CDD|241283 cd01252, PH_GRP1-like, General Receptor for
Phosphoinositides-1-like Pleckstrin homology (PH)
domain. GRP1/cytohesin3 and the related proteins ARNO
(ARF nucleotide-binding site opener)/cytohesin-2 and
cytohesin-1 are ARF exchange factors that contain a
pleckstrin homology (PH) domain thought to target these
proteins to cell membranes through binding
polyphosphoinositides. The PH domains of all three
proteins exhibit relatively high affinity for
PtdIns(3,4,5)P3. Within the Grp1 family, diglycine (2G)
and triglycine (3G) splice variants, differing only in
the number of glycine residues in the PH domain,
strongly influence the affinity and specificity for
phosphoinositides. The 2G variants selectively bind
PtdIns(3,4,5)P3 with high affinity,the 3G variants bind
PtdIns(3,4,5)P3 with about 30-fold lower affinity and
require the polybasic region for plasma membrane
targeting. These ARF-GEFs share a common, tripartite
structure consisting of an N-terminal coiled-coil
domain, a central domain with homology to the yeast
protein Sec7, a PH domain, and a C-terminal polybasic
region. The Sec7 domain is autoinhibited by conserved
elements proximal to the PH domain. GRP1 binds to the
DNA binding domain of certain nuclear receptors
(TRalpha, TRbeta, AR, ER, but not RXR), and can repress
thyroid hormone receptor (TR)-mediated transactivation
by decreasing TR-complex formation on thyroid hormone
response elements. ARNO promotes sequential activation
of Arf6, Cdc42 and Rac1 and insulin secretion. Cytohesin
acts as a PI 3-kinase effector mediating biological
responses including cell spreading and adhesion,
chemotaxis, protein trafficking, and cytoskeletal
rearrangements, only some of which appear to depend on
their ability to activate ARFs. PH domains have diverse
functions, but in general are involved in targeting
proteins to the appropriate cellular location or in the
interaction with a binding partner. They share little
sequence conservation, but all have a common fold, which
is electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 118
Score = 41.1 bits (97), Expect = 2e-05
Identities = 26/105 (24%), Positives = 45/105 (42%), Gaps = 24/105 (22%)
Query: 56 GFQITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPV-ARNFGFQI- 113
G ++ +W + WF+L L Y+ +E G++ L N+ S+ EV + F F++
Sbjct: 13 GGRVKSWKRRWFILTDNCLYYFEYTTDKE---PRGIIPLENL-SVREVEDSKKPFCFELY 68
Query: 114 -----------TTWDSK-----RTI--LSAVTAGIRNNWMSAIKR 140
T D K T+ +SA T + W+ +IK
Sbjct: 69 SPSNEVIKACKTDSDGKVVEGNHTVYRISAATEEEMDEWIKSIKA 113
Score = 36.9 bits (86), Expect = 0.001
Identities = 15/54 (27%), Positives = 27/54 (50%), Gaps = 5/54 (9%)
Query: 7 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPV-ARNFGFQI 59
+W + WF+L L Y+ +E G++ L N+ S+ EV + F F++
Sbjct: 18 SWKRRWFILTDNCLYYFEYTTDKE---PRGIIPLENL-SVREVEDSKKPFCFEL 67
>gnl|CDD|241442 cd13288, PH_Ses, Sesquipedalian family Pleckstrin homology (PH)
domain. The sesquipedalian family has 2 mammalian
members: Ses1 and Ses2, which are also callled 7 kDa
inositol polyphosphate phosphatase-interacting protein 1
and 2. They play a role in endocytic trafficking and are
required for receptor recycling from endosomes, both to
the trans-Golgi network and the plasma membrane. Members
of this family form homodimers and heterodimers.
Sesquipedalian interacts with inositol polyphosphate
5-phosphatase OCRL-1 (INPP5F) also known as Lowe
oculocerebrorenal syndrome protein, a phosphatase enzyme
that is involved in actin polymerization and is found in
the trans-Golgi network and INPP5B. Sesquipedalian
contains a single PH domain. PH domains have diverse
functions, but in general are involved in targeting
proteins to the appropriate cellular location or in the
interaction with a binding partner. They share little
sequence conservation, but all have a common fold, which
is electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 120
Score = 39.9 bits (94), Expect = 7e-05
Identities = 28/92 (30%), Positives = 39/92 (42%), Gaps = 13/92 (14%)
Query: 53 RNFGFQITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVT-SLSEVPVARNFGF 111
RN +Q K WFVL+G L Y+ E GV+ L T LSE + F
Sbjct: 20 RNTSYQ-----KRWFVLKGNLLFYFEKKGDRE---PLGVIVLEGCTVELSEDEE--PYAF 69
Query: 112 QITTWDSK-RT-ILSAVTAGIRNNWMSAIKRT 141
I R+ +L+A + +WM A+ R
Sbjct: 70 AIRFDGPGSRSYVLAAESQEDMESWMKALSRA 101
Score = 34.1 bits (79), Expect = 0.009
Identities = 21/64 (32%), Positives = 27/64 (42%), Gaps = 10/64 (15%)
Query: 2 LNKK----HTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVT-SLSEVPVARNFG 56
L KK ++ K WFVL+G L Y+ E GV+ L T LSE +
Sbjct: 14 LWKKGERNTSYQKRWFVLKGNLLFYFEKKGDRE---PLGVIVLEGCTVELSEDEE--PYA 68
Query: 57 FQIT 60
F I
Sbjct: 69 FAIR 72
>gnl|CDD|241291 cd01260, PH_CNK_mammalian-like, Connector enhancer of KSR (Kinase
suppressor of ras) (CNK) pleckstrin homology (PH)
domain. CNK family members function as protein
scaffolds, regulating the activity and the subcellular
localization of RAS activated RAF. There is a single CNK
protein present in Drosophila and Caenorhabditis elegans
in contrast to mammals which have 3 CNK proteins (CNK1,
CNK2, and CNK3). All of the CNK members contain a
sterile a motif (SAM), a conserved region in CNK (CRIC)
domain, and a PSD-95/DLG-1/ZO-1 (PDZ) domain, and, with
the exception of CNK3, a PH domain. A CNK2 splice
variant CNK2A also has a PDZ domain-binding motif at its
C terminus and Drosophila CNK (D-CNK) also has a domain
known as the Raf-interacting region (RIR) that mediates
binding of the Drosophila Raf kinase. This cd contains
CNKs from mammals, chickens, amphibians, fish, and
crustacea. PH domains have diverse functions, but in
general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 114
Score = 39.7 bits (93), Expect = 8e-05
Identities = 21/81 (25%), Positives = 38/81 (46%), Gaps = 3/81 (3%)
Query: 56 GFQITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITT 115
GF W ++WFVL+G SL +Y +P+ E++ +G + L + + + F+ +
Sbjct: 27 GFFGQKWKRYWFVLKGSSLYWYNNPQDEKA---EGFINLPDFKIERASECKKKYAFKASH 83
Query: 116 WDSKRTILSAVTAGIRNNWMS 136
K +A N W+S
Sbjct: 84 PKIKTFYFAAENLDDMNKWLS 104
Score = 38.1 bits (89), Expect = 3e-04
Identities = 14/53 (26%), Positives = 29/53 (54%), Gaps = 3/53 (5%)
Query: 8 WTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQIT 60
W ++WFVL+G SL +Y +P+ E++ +G + L + + + F+ +
Sbjct: 33 WKRYWFVLKGSSLYWYNNPQDEKA---EGFINLPDFKIERASECKKKYAFKAS 82
>gnl|CDD|241401 cd13247, BAR-PH_APPL, Adaptor protein containing PH domain, PTB
domain, and Leucine zipper motif Bin1/amphiphysin/Rvs167
(BAR)-Pleckstrin homology (PH) domain. APPL (also
called DCC-interacting protein (DIP)-13alpha) interacts
with oncoprotein serine/threonine kinase AKT2, tumor
suppressor protein DCC (deleted in colorectal cancer),
Rab5, GIPC (GAIP-interacting protein, C terminus), human
follicle-stimulating hormone receptor (FSHR), and the
adiponectin receptors AdipoR1 and AdipoR2. There are two
isoforms of human APPL: APPL1 and APPL2, which share
about 50% sequence identity. APPL has a BAR and a PH
domain near its N terminus, and the two domains are
thought to function as a unit (BAR-PH domain).
C-terminal to this is a PTB domain. Lipid binding assays
show that the BAR, PH, and PTB domains can bind
phospholipids. PH domains have diverse functions, but in
general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 125
Score = 38.5 bits (90), Expect = 2e-04
Identities = 24/85 (28%), Positives = 42/85 (49%), Gaps = 5/85 (5%)
Query: 60 TTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITTWDSK 119
W + +F +G +L+ P+ E +G L V+ L+N + + R F FQIT+ D K
Sbjct: 44 NRWDRVYFFTQGGNLMS--QPRDEVAGSL--VLDLDNTSVQAADCEDRRFVFQITSPDGK 99
Query: 120 RT-ILSAVTAGIRNNWMSAIKRTAA 143
+ +L A + R W++ I +
Sbjct: 100 KAIVLQAESEKDREEWIATINNISQ 124
Score = 28.1 bits (63), Expect = 1.2
Identities = 20/66 (30%), Positives = 33/66 (50%), Gaps = 5/66 (7%)
Query: 7 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITTWT-KH 65
W + +F +G +L+ P+ E +G L V+ L+N + + R F FQIT+ K
Sbjct: 45 RWDRVYFFTQGGNLMS--QPRDEVAGSL--VLDLDNTSVQAADCEDRRFVFQITSPDGKK 100
Query: 66 WFVLRG 71
VL+
Sbjct: 101 AIVLQA 106
>gnl|CDD|241462 cd13308, PH_3BP2, SH3 domain-binding protein 2 Pleckstrin homology
(PH) domain. SH3BP2 (the gene that encodes the adaptor
protein 3BP2), HD, ITU, IT10C3, and ADD1 are located
near the Huntington's Disease Gene on Human Chromosome
4pl6.3. SH3BP2 lies in a region that is often missing in
individuals with Wolf-Hirschhorn syndrome (WHS). Gain of
function mutations in SH3BP2 causes enhanced B-cell
antigen receptor (BCR)-mediated activation of nuclear
factor of activated T cells (NFAT), resulting in a rare,
genetic disorder called cherubism. This results in an
increase in the signaling complex formation with Syk,
phospholipase C-gamma2 (PLC-gamma2), and Vav1. It was
recently discovered that Tankyrase regulates 3BP2
stability through ADP-ribosylation and ubiquitylation by
the E3-ubiquitin ligase. Cherubism mutations uncouple
3BP2 from Tankyrase-mediated protein destruction, which
results in its stabilization and subsequent
hyperactivation of the Src, Syk, and Vav signaling
pathways. SH3BP2 is also a potential negative regulator
of the abl oncogene. PH domains have diverse functions,
but in general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 113
Score = 37.8 bits (88), Expect = 4e-04
Identities = 18/88 (20%), Positives = 38/88 (43%), Gaps = 7/88 (7%)
Query: 57 FQITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALN--NVTSLSEVPVARNFGFQIT 114
Q+ W + ++ + Y+++ ++ + GV +LN N + E + F F+I
Sbjct: 23 KQLLKWPLRYVIIHKGCVYYFKNSQSAKP---KGVFSLNGYNRRAAEETTSKKKFVFKII 79
Query: 115 -TWDSKRT-ILSAVTAGIRNNWMSAIKR 140
RT SA + WM ++++
Sbjct: 80 HLSKDHRTWYFSAKSEDEMKEWMESLRK 107
Score = 27.7 bits (62), Expect = 1.2
Identities = 15/81 (18%), Positives = 32/81 (39%), Gaps = 12/81 (14%)
Query: 7 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALN--NVTSLSEVPVARNFGFQITTWTK 64
W + ++ + Y+++ ++ + GV +LN N + E + F F+I
Sbjct: 27 KWPLRYVIIHKGCVYYFKNSQSAKP---KGVFSLNGYNRRAAEETTSKKKFVFKIIH--- 80
Query: 65 HWFVLRGCSLLYYRDPKAEES 85
L +Y K+E+
Sbjct: 81 ----LSKDHRTWYFSAKSEDE 97
>gnl|CDD|241456 cd13302, PH2_Pleckstrin_2, Pleckstrin 2 Pleckstrin homology (PH)
domain, repeat 2. Pleckstrin is a protein found in
platelets. This name is derived from platelet and
leukocyte C kinase substrate and the KSTR string of
amino acids. Pleckstrin 2 contains two PH domains and a
DEP (dishvelled, egl-10, and pleckstrin) domain. Unlike
pleckstrin 1, pleckstrin 2 does not contain obvious
sites of PKC phosphorylation. Pleckstrin 2 plays a role
in actin rearrangement, large lamellipodia and
peripheral ruffle formation, and may help orchestrate
cytoskeletal arrangement. The PH domains of pleckstrin 2
are thought to contribute to lamellipodia formation.
This cd contains the second PH domain repeat. PH domains
have diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They share
little sequence conservation, but all have a common
fold, which is electrostatically polarized. Less than
10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 109
Score = 37.5 bits (87), Expect = 4e-04
Identities = 26/95 (27%), Positives = 38/95 (40%), Gaps = 10/95 (10%)
Query: 56 GFQITTWTKHWFVLRGC-SLLYYRDPKAEESGVLDGVVALNN--VTSLSEVPVARNFG-- 110
G + W FVLR + L+Y DP E + G + L VT++ +
Sbjct: 17 GHRRKNWKVRKFVLRDDPAYLHYYDPAKGEDPL--GAIHLRGCVVTAVEDNSNPAKGSVE 74
Query: 111 ---FQITTWDSKRTILSAVTAGIRNNWMSAIKRTA 142
F+I T D L A T R W+ AI+ +
Sbjct: 75 GNLFEIITADEVHYYLQAATPAERTEWIKAIQMAS 109
>gnl|CDD|241282 cd01251, PH2_ADAP, ArfGAP with dual PH domains Pleckstrin homology
(PH) domain, repeat 2. ADAP (also called centaurin
alpha) is a phophatidlyinositide binding protein
consisting of an N-terminal ArfGAP domain and two PH
domains. In response to growth factor activation, PI3K
phosphorylates phosphatidylinositol 4,5-bisphosphate to
phosphatidylinositol 3,4,5-trisphosphate. Centaurin
alpha 1 is recruited to the plasma membrane following
growth factor stimulation by specific binding of its PH
domain to phosphatidylinositol 3,4,5-trisphosphate.
Centaurin alpha 2 is constitutively bound to the plasma
membrane since it binds phosphatidylinositol
4,5-bisphosphate and phosphatidylinositol
3,4,5-trisphosphate with equal affinity. This cd
contains the second PH domain repeat. PH domains have
diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They share
little sequence conservation, but all have a common
fold, which is electrostatically polarized. Less than
10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 105
Score = 36.8 bits (86), Expect = 6e-04
Identities = 27/97 (27%), Positives = 41/97 (42%), Gaps = 22/97 (22%)
Query: 58 QITTWTKHWFVLRGCSLLYYRDP-------------KAEESGVLDGVVALNNVTSLSEVP 104
Q + K WF L L+Y++DP K E V +G+ A +
Sbjct: 15 QTDGFRKRWFTLDDRRLMYFKDPLDAFPKGEIFIGSKEEGYSVREGLPA--------GIK 66
Query: 105 VARNFGFQITTWDSKRTILSAVTAGIRNNWMSAIKRT 141
FGF + T D + +LSA T R W++AI++
Sbjct: 67 GHWGFGFTLVTPD-RTFVLSAETEEERREWITAIQKV 102
Score = 26.8 bits (60), Expect = 3.0
Identities = 17/72 (23%), Positives = 26/72 (36%), Gaps = 21/72 (29%)
Query: 3 NKKHTWTKHWFVLRGCSLLYYRDP-------------KAEESGVLDGVVALNNVTSLSEV 49
+ + K WF L L+Y++DP K E V +G+ A +
Sbjct: 14 KQTDGFRKRWFTLDDRRLMYFKDPLDAFPKGEIFIGSKEEGYSVREGLPA--------GI 65
Query: 50 PVARNFGFQITT 61
FGF + T
Sbjct: 66 KGHWGFGFTLVT 77
>gnl|CDD|241455 cd13301, PH1_Pleckstrin_2, Pleckstrin 2 Pleckstrin homology (PH)
domain, repeat 1. Pleckstrin is a protein found in
platelets. This name is derived from platelet and
leukocyte C kinase substrate and the KSTR string of
amino acids. Pleckstrin 2 contains two PH domains and a
DEP (dishvelled, egl-10, and pleckstrin) domain. Unlike
pleckstrin 1, pleckstrin 2 does not contain obvious
sites of PKC phosphorylation. Pleckstrin 2 plays a role
in actin rearrangement, large lamellipodia and
peripheral ruffle formation, and may help orchestrate
cytoskeletal arrangement. The PH domains of pleckstrin 2
are thought to contribute to lamellipodia formation.
This cd contains the first PH domain repeat. PH domains
have diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They share
little sequence conservation, but all have a common
fold, which is electrostatically polarized. Less than
10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 108
Score = 34.3 bits (79), Expect = 0.007
Identities = 25/94 (26%), Positives = 34/94 (36%), Gaps = 19/94 (20%)
Query: 56 GFQITTWTKHWFVLRGCSLLYY-----RDPKAEESGVLDGVVALNNVTSLSEVPVA---- 106
G + W WFVL L YY PK G++ L T S P
Sbjct: 13 GHVVNNWKARWFVLLEDKLEYYKKKTDSSPK--------GMILLKGCTITS--PCLEYEK 62
Query: 107 RNFGFQITTWDSKRTILSAVTAGIRNNWMSAIKR 140
R F++TT + L A + R+ W I +
Sbjct: 63 RPLVFKLTTAKGQDHFLQACSREERDAWAKDITK 96
Score = 30.4 bits (69), Expect = 0.14
Identities = 22/78 (28%), Positives = 28/78 (35%), Gaps = 19/78 (24%)
Query: 6 HTWTKHWFVLRGCSLLYY-----RDPKAEESGVLDGVVALNNVTSLSEVPVA----RNFG 56
+ W WFVL L YY PK G++ L T S P R
Sbjct: 17 NNWKARWFVLLEDKLEYYKKKTDSSPK--------GMILLKGCTITS--PCLEYEKRPLV 66
Query: 57 FQITTWTKHWFVLRGCSL 74
F++TT L+ CS
Sbjct: 67 FKLTTAKGQDHFLQACSR 84
>gnl|CDD|241292 cd01261, PH_SOS, Son of Sevenless (SOS) Pleckstrin homology (PH)
domain. SOS is a Ras guanine nucleotide exchange
factor. SOS is thought to transmit signals from
activated receptor tyrosine kinases to the Ras signaling
pathway. SOS contains a histone domain, Dbl-homology
(DH), a PH domain, Rem domain, Cdc25 domain, and a Grb2
binding domain. The SOS PH domain binds to
phosphatidylinositol-4,5-bisphosphate (PIP2) and
phosphatidic acid (PA). SOS is dependent on Ras binding
to the allosteric site via its histone domain for both a
lower level of activity (Ras GDP) and maximal activity
(Ras GTP). The DH domain blocks the allosteric Ras
binding site in SOS. The PH domain is closely associated
with the DH domain and the action of the DH-PH unit
gates a reciprocal interaction between Ras and SOS. The
C-terminal proline-rich domain of SOS binds to the
adapter protein Grb2 which localizes the Sos protein to
the plasma membrane and diminishes the negative effect
of the C-terminal domain on the guanine nucleotide
exchange activity of the CDC25-homology domain of SOS.
PH domains have diverse functions, but in general are
involved in targeting proteins to the appropriate
cellular location or in the interaction with a binding
partner. They share little sequence conservation, but
all have a common fold, which is electrostatically
polarized. Less than 10% of PH domains bind
phosphoinositide phosphates (PIPs) with high affinity
and specificity. PH domains are distinguished from other
PIP-binding domains by their specific high-affinity
binding to PIPs with two vicinal phosphate groups:
PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which
results in targeting some PH domain proteins to the
plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 109
Score = 33.8 bits (78), Expect = 0.009
Identities = 12/32 (37%), Positives = 17/32 (53%)
Query: 109 FGFQITTWDSKRTILSAVTAGIRNNWMSAIKR 140
F+I D IL A +A +NNWM+A+
Sbjct: 76 NAFEIVPRDEPSYILFAKSAEEKNNWMAALVT 107
>gnl|CDD|241470 cd13316, PH_Boi, Boi family Pleckstrin homology domain. Yeast Boi
proteins Boi1 and Boi2 are functionally redundant and
important for cell growth with Boi mutants displaying
defects in bud formation and in the maintenance of cell
polarity.They appear to be linked to Rho-type GTPase,
Cdc42 and Rho3. Boi1 and Boi2 display two-hybrid
interactions with the GTP-bound ("active") form of
Cdc42, while Rho3 can suppress of the lethality caused
by deletion of Boi1 and Boi2. These findings suggest
that Boi1 and Boi2 are targets of Cdc42 that promote
cell growth in a manner that is regulated by Rho3. Boi
proteins contain a N-terminal SH3 domain, followed by a
SAM (sterile alpha motif) domain, a proline-rich region,
which mediates binding to the second SH3 domain of Bem1,
and C-terminal PH domain. The PH domain is essential for
its function in cell growth and is important for
localization to the bud, while the SH3 domain is needed
for localization to the neck. PH domains have diverse
functions, but in general are involved in targeting
proteins to the appropriate cellular location or in the
interaction with a binding partner. They share little
sequence conservation, but all have a common fold, which
is electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 95
Score = 33.5 bits (77), Expect = 0.011
Identities = 19/82 (23%), Positives = 32/82 (39%), Gaps = 6/82 (7%)
Query: 60 TTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNN--VTSLSEVPVARNFGFQITTWD 117
TW +FVL+G L Y K+E G++ L VT +GF++
Sbjct: 13 GTWKTRYFVLKGTRLYYL---KSENDSKEKGLIDLTGHRVTVDDSNSKPGRYGFKLVPPA 69
Query: 118 SKRT-ILSAVTAGIRNNWMSAI 138
++ + + WM A+
Sbjct: 70 VEKVHYFAVDEKEVLREWMKAL 91
Score = 31.2 bits (71), Expect = 0.074
Identities = 16/58 (27%), Positives = 25/58 (43%), Gaps = 5/58 (8%)
Query: 4 KKHTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNN--VTSLSEVPVARNFGFQI 59
+ TW +FVL+G L Y K+E G++ L VT +GF++
Sbjct: 11 RYGTWKTRYFVLKGTRLYYL---KSENDSKEKGLIDLTGHRVTVDDSNSKPGRYGFKL 65
>gnl|CDD|241407 cd13253, PH1_ARAP, ArfGAP with RhoGAP domain, ankyrin repeat and PH
domain Pleckstrin homology (PH) domain, repeat 1. ARAP
proteins (also called centaurin delta) are
phosphatidylinositol 3,4,5-trisphosphate-dependent
GTPase-activating proteins that modulate actin
cytoskeleton remodeling by regulating ARF and RHO family
members. They bind phosphatidylinositol
3,4,5-trisphosphate (PtdIns(3,4,5)P3) and
phosphatidylinositol 3,4-bisphosphate (PtdIns(3,4,5)P2)
binding. There are 3 mammalian ARAP proteins: ARAP1,
ARAP2, and ARAP3. All ARAP proteins contain a N-terminal
SAM (sterile alpha motif) domain, 5 PH domains, an
ArfGAP domain, 2 ankyrin domain, A RhoGap domain, and a
Ras-associating domain. This hierarchy contains the
first PH domain in ARAP. PH domains have diverse
functions, but in general are involved in targeting
proteins to the appropriate cellular location or in the
interaction with a binding partner. They share little
sequence conservation, but all have a common fold, which
is electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 93
Score = 33.4 bits (77), Expect = 0.011
Identities = 24/87 (27%), Positives = 39/87 (44%), Gaps = 14/87 (16%)
Query: 53 RNFGFQITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQ 112
N+ FQ K W V G SL Y+ +E+ G++ L +S+ V + F+
Sbjct: 13 GNYVFQ-----KRWVVFDGDSLRYF---NSEKEMYSKGIIPL---SSIKTVRSVGDNKFE 61
Query: 113 ITTWDSKRT-ILSAVTAGIRNNWMSAI 138
+ T RT + A + RN W+S +
Sbjct: 62 VVT--GNRTFVFRAESEDERNLWVSTL 86
Score = 27.3 bits (61), Expect = 1.8
Identities = 17/63 (26%), Positives = 28/63 (44%), Gaps = 7/63 (11%)
Query: 8 WTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITTWTKHWF 67
+ K W V G SL Y+ +E+ G++ L +S+ V + F++ T F
Sbjct: 17 FQKRWVVFDGDSLRYF---NSEKEMYSKGIIPL---SSIKTVRSVGDNKFEVVT-GNRTF 69
Query: 68 VLR 70
V R
Sbjct: 70 VFR 72
>gnl|CDD|241480 cd13326, PH_CNK_insect-like, Connector enhancer of KSR (Kinase
suppressor of ras) (CNK) pleckstrin homology (PH)
domain. CNK family members function as protein
scaffolds, regulating the activity and the subcellular
localization of RAS activated RAF. There is a single CNK
protein present in Drosophila and Caenorhabditis elegans
in contrast to mammals which have 3 CNK proteins (CNK1,
CNK2, and CNK3). All of the CNK members contain a
sterile a motif (SAM), a conserved region in CNK (CRIC)
domain, and a PSD-95/DLG-1/ZO-1 (PDZ) domain, and a PH
domain. A CNK2 splice variant CNK2A also has a PDZ
domain-binding motif at its C terminus and Drosophila
CNK (D-CNK) also has a domain known as the
Raf-interacting region (RIR) that mediates binding of
the Drosophila Raf kinase. This cd contains CNKs from
insects, spiders, mollusks, and nematodes. PH domains
have diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They share
little sequence conservation, but all have a common
fold, which is electrostatically polarized. Less than
10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 90
Score = 33.1 bits (76), Expect = 0.013
Identities = 18/60 (30%), Positives = 31/60 (51%), Gaps = 6/60 (10%)
Query: 56 GFQITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALN--NVTSLSEVPVARNFGFQI 113
G W K WFVL+G +L +R ++ ++ D V+ L V+ EV +R + F++
Sbjct: 12 GKGGGKWAKRWFVLKGSNLYGFRSQESTKA---DCVIFLPGFTVSPAPEVK-SRKYAFKV 67
Score = 30.8 bits (70), Expect = 0.099
Identities = 17/54 (31%), Positives = 30/54 (55%), Gaps = 6/54 (11%)
Query: 8 WTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALN--NVTSLSEVPVARNFGFQI 59
W K WFVL+G +L +R ++ ++ D V+ L V+ EV +R + F++
Sbjct: 18 WAKRWFVLKGSNLYGFRSQESTKA---DCVIFLPGFTVSPAPEVK-SRKYAFKV 67
>gnl|CDD|241529 cd13378, PH_RhoGAP2, Rho GTPase activating protein 2 Pleckstrin
homology (PH) domain. RhoGAP2 (also called RhoGap22 or
ArhGap22) are involved in cell polarity, cell
morphology and cytoskeletal organization. They activate
a GTPase belonging to the RAS superfamily of small
GTP-binding proteins. The encoded protein is
insulin-responsive, is dependent on the kinase Akt, and
requires the Akt-dependent 14-3-3 binding protein which
binds sequentially to two serine residues resulting in
regulation of cell motility. Members here contain an
N-terminal PH domain followed by a RhoGAP domain and
either a BAR or TATA Binding Protein (TBP) Associated
Factor 4 (TAF4) domain. PH domains have diverse
functions, but in general are involved in targeting
proteins to the appropriate cellular location or in the
interaction with a binding partner. They share little
sequence conservation, but all have a common fold,
which is electrostatically polarized. Less than 10% of
PH domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved
across all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 116
Score = 33.4 bits (76), Expect = 0.016
Identities = 18/45 (40%), Positives = 23/45 (51%), Gaps = 5/45 (11%)
Query: 8 WTKHWFVLRGCSLLYYRDPKAEESGVLDGVVAL--NNVTSLSEVP 50
W + WFVLRG L YY+D EE G ++L + V L P
Sbjct: 19 WQQRWFVLRGDQLFYYKD---EEETKPQGCISLQGSQVNELPPNP 60
Score = 33.4 bits (76), Expect = 0.016
Identities = 18/45 (40%), Positives = 23/45 (51%), Gaps = 5/45 (11%)
Query: 62 WTKHWFVLRGCSLLYYRDPKAEESGVLDGVVAL--NNVTSLSEVP 104
W + WFVLRG L YY+D EE G ++L + V L P
Sbjct: 19 WQQRWFVLRGDQLFYYKD---EEETKPQGCISLQGSQVNELPPNP 60
>gnl|CDD|241309 cd10573, PH_DAPP1, Dual Adaptor for Phosphotyrosine and
3-Phosphoinositides Pleckstrin homology (PH) domain.
DAPP1 (also known as PHISH/3'
phosphoinositide-interacting SH2 domain-containing
protein or Bam32) plays a role in B-cell activation and
has potential roles in T-cell and mast cell function.
DAPP1 promotes B cell receptor (BCR) induced activation
of Rho GTPases Rac1 and Cdc42, which feed into
mitogen-activated protein kinases (MAPK) activation
pathways and affect cytoskeletal rearrangement. DAPP1can
also regulate BCR-induced activation of extracellular
signal-regulated kinase (ERK), and c-jun NH2-terminal
kinase (JNK). DAPP1 contains an N-terminal SH2 domain
and a C-terminal pleckstrin homology (PH) domain with a
single tyrosine phosphorylation site located centrally.
DAPP1 binds strongly to both PtdIns(3,4,5)P3 and
PtdIns(3,4)P2. The PH domain is essential for plasma
membrane recruitment of PI3K upon cell activation. PH
domains have diverse functions, but in general are
involved in targeting proteins to the appropriate
cellular location or in the interaction with a binding
partner. They share little sequence conservation, but
all have a common fold, which is electrostatically
polarized. Less than 10% of PH domains bind
phosphoinositide phosphates (PIPs) with high affinity
and specificity. PH domains are distinguished from other
PIP-binding domains by their specific high-affinity
binding to PIPs with two vicinal phosphate groups:
PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which
results in targeting some PH domain proteins to the
plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 96
Score = 31.9 bits (73), Expect = 0.040
Identities = 20/87 (22%), Positives = 33/87 (37%), Gaps = 9/87 (10%)
Query: 56 GFQITTWTKHWFVLRGCSLLYYRDPKAEES-GVLDGVVALNNVTSLSEVPV-ARNFGFQI 113
G + W WFVLR L Y++ + LD L +S+ + F++
Sbjct: 13 GGIVKNWKTRWFVLRKNELKYFKTRTDTKPIRTLD----LTECSSVQADYSQGKPNCFRL 68
Query: 114 TTWDSKRT-ILSAVTAGIRNNWMSAIK 139
RT + A T + W+ +K
Sbjct: 69 VF--PDRTFYMYAKTEEEADEWVKLLK 93
Score = 28.0 bits (63), Expect = 1.0
Identities = 8/24 (33%), Positives = 11/24 (45%)
Query: 7 TWTKHWFVLRGCSLLYYRDPKAEE 30
W WFVLR L Y++ +
Sbjct: 18 NWKTRWFVLRKNELKYFKTRTDTK 41
>gnl|CDD|241450 cd13296, PH2_MyoX, Myosin X Pleckstrin homology (PH) domain, repeat
2. MyoX, a MyTH-FERM myosin, is a molecular motor that
has crucial functions in the transport and/or tethering
of integrins in the actin-based extensions known as
filopodia, microtubule binding, and in netrin-mediated
axon guidance. It functions as a dimer. MyoX walks on
bundles of actin, rather than single filaments, unlike
the other unconventional myosins. MyoX is present in
organisms ranging from humans to choanoflagellates, but
not in Drosophila and Caenorhabditis elegans.MyoX
consists of a N-terminal motor/head region, a neck made
of 3 IQ motifs, and a tail consisting of a coiled-coil
domain, a PEST region, 3 PH domains, a myosin tail
homology 4 (MyTH4), and a FERM domain at its very
C-terminus. The first PH domain in the MyoX tail is a
split-PH domain, interupted by the second PH domain such
that PH 1a and PH 1b flanks PH 2. The third PH domain
(PH 3) follows the PH 1b domain. This cd contains the
second PH repeat. PH domains have diverse functions, but
in general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 111
Score = 32.0 bits (73), Expect = 0.042
Identities = 22/79 (27%), Positives = 32/79 (40%), Gaps = 4/79 (5%)
Query: 62 WTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITTWDSKRT 121
W WFVLR L YY +E G + + + + + N GF ITT S+
Sbjct: 28 WKSRWFVLRDTVLKYY--ENDQEGAKALGTIDIRSAKEIVDNTPKEN-GFDITT-PSRTY 83
Query: 122 ILSAVTAGIRNNWMSAIKR 140
A + + W S + R
Sbjct: 84 HFVAESPEDASQWFSVLTR 102
Score = 27.4 bits (61), Expect = 1.7
Identities = 17/54 (31%), Positives = 23/54 (42%), Gaps = 3/54 (5%)
Query: 8 WTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITT 61
W WFVLR L YY +E G + + + + + N GF ITT
Sbjct: 28 WKSRWFVLRDTVLKYY--ENDQEGAKALGTIDIRSAKEIVDNTPKEN-GFDITT 78
>gnl|CDD|241530 cd13379, PH_RhoGap24, Rho GTPase activating protein 24 Pleckstrin
homology (PH) domain. RhoGap24 (also called ARHGAP24,
p73RhoGAp, and Filamin-A-associated RhoGAP) like other
RhoGAPs are involved in cell polarity, cell morphology
and cytoskeletal organization. They act as GTPase
activators for the Rac-type GTPases by converting them
to an inactive GDP-bound state and control actin
remodeling by inactivating Rac downstream of Rho
leading to suppress leading edge protrusion and
promotes cell retraction to achieve cellular polarity
and are able to suppress RAC1 and CDC42 activity in
vitro. Overexpression of these proteins induces cell
rounding with partial or complete disruption of actin
stress fibers and formation of membrane ruffles,
lamellipodia, and filopodia. Members here contain an
N-terminal PH domain followed by a RhoGAP domain and
either a BAR or TATA Binding Protein (TBP) Associated
Factor 4 (TAF4) domain. PH domains have diverse
functions, but in general are involved in targeting
proteins to the appropriate cellular location or in the
interaction with a binding partner. They share little
sequence conservation, but all have a common fold,
which is electrostatically polarized. Less than 10% of
PH domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved
across all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 114
Score = 32.3 bits (73), Expect = 0.043
Identities = 12/27 (44%), Positives = 16/27 (59%)
Query: 53 RNFGFQITTWTKHWFVLRGCSLLYYRD 79
R G + TW WFVL+G L Y++D
Sbjct: 10 RKQGGFVKTWHTRWFVLKGDQLYYFKD 36
Score = 31.1 bits (70), Expect = 0.11
Identities = 10/19 (52%), Positives = 13/19 (68%)
Query: 7 TWTKHWFVLRGCSLLYYRD 25
TW WFVL+G L Y++D
Sbjct: 18 TWHTRWFVLKGDQLYYFKD 36
>gnl|CDD|241440 cd13286, PH_OPR5_ORP8, Human Oxysterol binding protein related
proteins 5 and 8 Pleckstrin homology (PH) domain.
Human ORP5 is proposed to function in efficient
nonvesicular transfer of low-density
lipoproteins-derived cholesterol (LDL-C) from late
endosomes/lysosomes to the endoplasmic reticulum (ER).
Human ORP8 is proposed to modulate lipid homeostasis
and sterol regulatory element binding proteins (SREBP)
activity. Both ORP5 and ORP8 contain a N-terminal PH
domain, a C-terminal OSBP-related domain, followed by a
transmembrane domain that localizes ORP5 to the ER.
Unlike all the other human OSBP/ORPs they lack a FFAT
motif (two phenylalanines in an acidic tract).
Oxysterol binding proteins are a multigene family that
is conserved in yeast, flies, worms, mammals and
plants. In general OSBPs and ORPs have been found to be
involved in the transport and metabolism of cholesterol
and related lipids in eukaryotes. They all contain a
C-terminal oxysterol binding domain, and most contain
an N-terminal PH domain. OSBP PH domains bind to
membrane phosphoinositides and thus likely play an
important role in intracellular targeting. They are
members of the oxysterol binding protein (OSBP) family
which includes OSBP, OSBP-related proteins (ORP),
Goodpasture antigen binding protein (GPBP), and Four
phosphate adaptor protein 1 (FAPP1). They have a wide
range of purported functions including sterol
transport, cell cycle control, pollen development and
vessicle transport from Golgi recognize both PI lipids
and ARF proteins. PH domains have diverse functions,
but in general are involved in targeting proteins to
the appropriate cellular location or in the interaction
with a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved
across all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 130
Score = 32.3 bits (74), Expect = 0.046
Identities = 16/35 (45%), Positives = 19/35 (54%), Gaps = 3/35 (8%)
Query: 7 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALN 41
+WTK W VL+ LL Y+ PK G G V LN
Sbjct: 22 SWTKLWCVLKPGVLLLYKSPK---HGQWVGTVLLN 53
Score = 32.3 bits (74), Expect = 0.046
Identities = 16/35 (45%), Positives = 19/35 (54%), Gaps = 3/35 (8%)
Query: 61 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALN 95
+WTK W VL+ LL Y+ PK G G V LN
Sbjct: 22 SWTKLWCVLKPGVLLLYKSPK---HGQWVGTVLLN 53
>gnl|CDD|241274 cd01241, PH_PKB, Protein Kinase B-like pleckstrin homology (PH)
domain. PKB (also called Akt), a member of the AGC
kinase family, is a phosphatidylinositol 3'-kinase
(PI3K)-dependent Ser/Thr kinase which alters the
activity of the targeted protein. The name AGC is based
on the three proteins that it is most similar to
cAMP-dependent protein kinase 1 (PKA; also known as
PKAC), cGMP-dependent protein kinase (PKG; also known as
CGK1) and protein kinase C (PKC). Human Akt has three
isoforms derived for distinct genes: Akt1/PKBalpha,
Akt2/PKBbeta, and Akt3/PKBgamma. All Akts have an
N-terminal PH domain with an activating Thr
phosphorylation site, a kinase domain, and a short
C-terminal regulatory tail with an activating Ser
phosphorylation site. The PH domain recruits Akt to the
plasma membrane by binding to phosphoinositides
(PtdIns-3,4-P2) and is required for activation. The
phosphorylation of Akt at its Thr and Ser
phosphorylation sites leads to increased Akt activity
toward forkhead transcription factors, the mammalian
target of rapamycin (mTOR), and the
Bcl-xL/Bcl-2-associated death promoter (BAD), all of
which possess a consensus motif R-X-R-XX-ST-B (X = amino
acid, B = bulky hydrophobic residue) for Akt
phosphorylation. PH domains have diverse functions, but
in general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 121
Score = 32.0 bits (73), Expect = 0.055
Identities = 26/107 (24%), Positives = 35/107 (32%), Gaps = 22/107 (20%)
Query: 59 ITTWTKHWFVLRGC--SLLYYRDPKAEESGVLDGVVALNNVT----------SLSEVPVA 106
I TW WFVL+ Y++ K ++ V LNN + + V
Sbjct: 16 IKTWRPRWFVLKSDDGKFKGYKE-KPQDKDVDPTPKPLNNFSVAIKRTYLIKTEKPKEVI 74
Query: 107 RNF----GFQITTWDSK----RTILSAVTAGIRNNWMSAIKRTAAMS 145
N Q TT D RT R W +AI + S
Sbjct: 75 ENTFIIRCLQWTTPDELKVIERTFHVKSQ-LEREEWTNAIYAVKSRS 120
Score = 28.9 bits (65), Expect = 0.59
Identities = 18/82 (21%), Positives = 27/82 (32%), Gaps = 17/82 (20%)
Query: 6 HTWTKHWFVLRGC--SLLYYRDPKAEESGVLDGVVALNNVT----------SLSEVPVAR 53
TW WFVL+ Y++ K ++ V LNN + + V
Sbjct: 17 KTWRPRWFVLKSDDGKFKGYKE-KPQDKDVDPTPKPLNNFSVAIKRTYLIKTEKPKEVIE 75
Query: 54 NF----GFQITTWTKHWFVLRG 71
N Q TT + + R
Sbjct: 76 NTFIIRCLQWTTPDELKVIERT 97
>gnl|CDD|241540 cd13389, PH1_FGD5_FGD6, FYVE, RhoGEF and PH domain
containing/faciogenital dysplasia proteins 5 and 6
Pleckstrin Homology (PH) domain. FGD5 regulates
promotes angiogenesis of vascular endothelial growth
factor (VEGF) in vascular endothelial cells, including
network formation, permeability, directional movement,
and proliferation. The specific function of FGD6 is
unknown. In general, FGDs have a RhoGEF (DH) domain,
followed by a PH domain, a FYVE domain and a C-terminal
PH domain. All FGDs are guanine nucleotide exchange
factors that activate the Rho GTPase Cdc42, an important
regulator of membrane trafficking. The RhoGEF domain is
responsible for GEF catalytic activity, while the PH
domain is involved in intracellular targeting of the DH
domain. PH domains have diverse functions, but in
general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 125
Score = 31.5 bits (72), Expect = 0.070
Identities = 23/85 (27%), Positives = 32/85 (37%), Gaps = 14/85 (16%)
Query: 67 FVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARN------FGFQITTWDSKR 120
L LLY G L N LS + V+ FQI + +KR
Sbjct: 33 LFLFNDVLLY-----TTPVQSGVGKYKLKNELPLSGMKVSLPEDEEYSNEFQIES--TKR 85
Query: 121 T-ILSAVTAGIRNNWMSAIKRTAAM 144
+ LSA +A R+ W+ A+ R
Sbjct: 86 SFTLSASSAEERDEWVKALSRAIED 110
>gnl|CDD|241271 cd01238, PH_Btk, Bruton's tyrosine kinase pleckstrin homology
(PH) domain. Btk is a member of the Tec family of
cytoplasmic protein tyrosine kinases that includes BMX,
IL2-inducible T-cell kinase (Itk) and Tec. Btk plays a
role in the maturation of B cells. Tec proteins general
have an N-terminal PH domain, followed by a Tek
homology (TH) domain, a SH3 domain, a SH2 domain and a
kinase domain. The Btk PH domain binds
phosphatidylinositol 3,4,5-trisphosphate and responds
to signalling via phosphatidylinositol 3-kinase. The PH
domain is also involved in membrane anchoring which is
confirmed by the discovery of a mutation of a critical
arginine residue in the BTK PH domain. This results in
severe human immunodeficiency known as X-linked
agammaglobulinemia (XLA) in humans and a related
disorder is mice.PH domains have diverse functions, but
in general are involved in targeting proteins to the
appropriate cellular location or in the interaction
with a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved
across all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 140
Score = 31.8 bits (73), Expect = 0.072
Identities = 23/90 (25%), Positives = 34/90 (37%), Gaps = 18/90 (20%)
Query: 3 NKKHT----WTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEV----PVARN 54
KK + + WFVL SL YY + + G G + L+ + + EV R
Sbjct: 11 GKKRFGPVNYKERWFVLTKSSLSYY-EGDGGKRGKEKGSIDLSKIKCVEEVKDDASFERK 69
Query: 55 FGFQITTWTKHWFVLRGCSLLYYRDPKAEE 84
+ FQ V+ LY P E+
Sbjct: 70 YPFQ---------VVYDDYTLYVFAPSEED 90
>gnl|CDD|241387 cd13233, PH_ARHGAP9-like, Beta-spectrin pleckstrin homology (PH)
domain. ARHGAP family genes encode Rho/Rac/Cdc42-like
GTPase activating proteins with RhoGAP domain. The
ARHGAP members here all have a PH domain upstream of
their C-terminal RhoGAP domain. Some have additional
N-terminal SH3 and WW domains. The members here include:
ARHGAP9, ARHGAP12, ARHGAP15, and ARHGAP27. ARHGAP27 and
ARHGAP12 shared the common-domain structure, consisting
of SH3, WW, PH, and RhoGAP domains. The PH domain of
ArhGAP9 employs a non-canonical phosphoinositide binding
mechanism, a variation of the spectrin-
Ins(4,5)P2-binding mode, that gives rise to a unique PI
binding profile, namely a preference for both PI(4,5)P2
and the PI 3-kinase products PI(3,4,5)P3 and PI(3,4)P2.
This lipid binding mechanism is also employed by the PH
domain of Tiam1 and Slm1. PH domains have diverse
functions, but in general are involved in targeting
proteins to the appropriate cellular location or in the
interaction with a binding partner. They share little
sequence conservation, but all have a common fold, which
is electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 110
Score = 31.1 bits (71), Expect = 0.081
Identities = 23/87 (26%), Positives = 36/87 (41%), Gaps = 8/87 (9%)
Query: 62 WTKHWFVLRGCSLLYYRDPKAEESGVL-----DGVVALN--NVTSLSEVPVARNFGFQIT 114
W+ W VL G LL+Y+D K+ + + V L ++ E +N FQ++
Sbjct: 22 WSTSWVVLTGSHLLFYKDQKSAAASGGPQSKPESSVDLRGASIEWAKEKSSRKNV-FQLS 80
Query: 115 TWDSKRTILSAVTAGIRNNWMSAIKRT 141
T +L + W AIKR
Sbjct: 81 TVTGTEYLLQSDNDTEIQEWFDAIKRV 107
Score = 27.2 bits (61), Expect = 1.9
Identities = 20/74 (27%), Positives = 36/74 (48%), Gaps = 9/74 (12%)
Query: 4 KKHTWTKHWFVLRGCSLLYYRDPKAEESGVL-----DGVVALN--NVTSLSEVPVARNFG 56
+K+ W+ W VL G LL+Y+D K+ + + V L ++ E +N
Sbjct: 19 RKN-WSTSWVVLTGSHLLFYKDQKSAAASGGPQSKPESSVDLRGASIEWAKEKSSRKNV- 76
Query: 57 FQITTWTKHWFVLR 70
FQ++T T ++L+
Sbjct: 77 FQLSTVTGTEYLLQ 90
>gnl|CDD|241432 cd13278, PH_Bud4, Bud4 Pleckstrin homology (PH) domain. Bud4 is an
anillin-like yeast protein involved in the formation and
the disassembly of the double ring structure formed by
the septins during cytokinesis. Bud4 acts with Bud3 and
and in parallel with septin phosphorylation by the
p21-activated kinase Cla4 and the septin-dependent
kinase Gin4. Bud4 is regulated by the cyclin-dependent
protein kinase Cdk1, the master regulator of cell cycle
progression. Bud4 contains an anillin-like domain
followed by a PH domain. In addition there are two
consensus Cdk phosphorylation sites: one at the
N-terminus and one right before the C-terminal PH
domain. Anillins also have C-terminal PH domains. PH
domains have diverse functions, but in general are
involved in targeting proteins to the appropriate
cellular location or in the interaction with a binding
partner. They share little sequence conservation, but
all have a common fold, which is electrostatically
polarized. Less than 10% of PH domains bind
phosphoinositide phosphates (PIPs) with high affinity
and specificity. PH domains are distinguished from other
PIP-binding domains by their specific high-affinity
binding to PIPs with two vicinal phosphate groups:
PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which
results in targeting some PH domain proteins to the
plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 139
Score = 31.0 bits (71), Expect = 0.14
Identities = 23/109 (21%), Positives = 41/109 (37%), Gaps = 19/109 (17%)
Query: 59 ITTWTKHWFVLRGCSLLYY----RDPKAE--ESGVLDGVVALNNVTSLSEVPVARNF--- 109
W + +F L+G L+ Y R P+A V+D VV ++ + RNF
Sbjct: 32 CEYWRRRFFKLQGTKLVAYHEVTRKPRATINLLKVVD-VVDDDDARERTSS-FKRNFTDL 89
Query: 110 -----GFQITTWDSKRTILSAVTAGIRNNWMSAIKRTAAMSLLDDKASP 153
F++ + + A + + +W S +K L+ P
Sbjct: 90 VLFEECFRLVFANGEVIDFYADSKEEKADWYSKLKEVVE---LNRFHQP 135
>gnl|CDD|241453 cd13299, PH2_PH_fungal, Fungal proteins Pleckstrin homology (PH)
domain, repeat 2. The functions of these fungal
proteins are unknown, but they all contain 2 PH domains.
This cd represents the second PH repeat. PH domains have
diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They share
little sequence conservation, but all have a common
fold, which is electrostatically polarized. Less than
10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 102
Score = 30.3 bits (69), Expect = 0.17
Identities = 24/81 (29%), Positives = 44/81 (54%), Gaps = 7/81 (8%)
Query: 62 WTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEV-PVARN--FGFQITTWDS 118
W K+W VLR SL +Y+D ++E S V ++ ++++ + E+ P++++ + QI T
Sbjct: 23 WKKYWLVLRNRSLSFYKD-QSEYSPVK--IIPIDDIIDVVELDPLSKSKKWCLQIIT-PE 78
Query: 119 KRTILSAVTAGIRNNWMSAIK 139
KR A W+ A+K
Sbjct: 79 KRIRFCADDEESLIKWLGALK 99
Score = 29.1 bits (66), Expect = 0.39
Identities = 22/69 (31%), Positives = 42/69 (60%), Gaps = 8/69 (11%)
Query: 1 MLNKK--HTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEV-PVARN--F 55
+L KK + W K+W VLR SL +Y+D ++E S V ++ ++++ + E+ P++++ +
Sbjct: 14 VLKKKGVNQWKKYWLVLRNRSLSFYKD-QSEYSPVK--IIPIDDIIDVVELDPLSKSKKW 70
Query: 56 GFQITTWTK 64
QI T K
Sbjct: 71 CLQIITPEK 79
>gnl|CDD|241266 cd01233, PH_KIFIA_KIFIB, KIFIA and KIFIB protein pleckstrin
homology (PH) domain. The kinesin-3 family motors KIFIA
(Caenorhabditis elegans homolog unc-104) and KIFIB
transport synaptic vesicle precursors that contain
synaptic vesicle proteins, such as synaptophysin,
synaptotagmin and the small GTPase RAB3A, but they do
not transport organelles that contain plasma membrane
proteins. They have a N-terminal motor domain, followed
by a coiled-coil domain, and a C-terminal PH domain.
KIF1A adopts a monomeric form in vitro, but acts as a
processive dimer in vivo. KIF1B has alternatively
spliced isoforms distinguished by the presence or
absence of insertion sequences in the conserved
amino-terminal region of the protein; this results in
their different motor activities. KIF1A and KIF1B bind
to RAB3 proteins through the adaptor protein
mitogen-activated protein kinase (MAPK) -activating
death domain (MADD; also calledDENN), which was first
identified as a RAB3 guanine nucleotide exchange factor
(GEF). PH domains have diverse functions, but in general
are involved in targeting proteins to the appropriate
cellular location or in the interaction with a binding
partner. They share little sequence conservation, but
all have a common fold, which is electrostatically
polarized. Less than 10% of PH domains bind
phosphoinositide phosphates (PIPs) with high affinity
and specificity. PH domains are distinguished from other
PIP-binding domains by their specific high-affinity
binding to PIPs with two vicinal phosphate groups:
PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which
results in targeting some PH domain proteins to the
plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 111
Score = 29.9 bits (68), Expect = 0.21
Identities = 22/92 (23%), Positives = 36/92 (39%), Gaps = 18/92 (19%)
Query: 61 TWTKHWFVLRGCSLLYYRDPK-AEESGVLDGVVALNNVTSLS-------EVPVARNFGFQ 112
W + W VLR L Y K +E GV+ N+++ E + R F
Sbjct: 29 GWVRRWVVLRRPYLHIYSSEKDGDERGVI-------NLSTARVEYSPDQEALLGRPNVFA 81
Query: 113 ITTWDSKRT-ILSAVTAGIRNNWMSAIKRTAA 143
+ T + +L A + ++W+ AI A
Sbjct: 82 VYT--PTNSYLLQARSEKEMHDWLYAIDPLLA 111
Score = 29.1 bits (66), Expect = 0.39
Identities = 11/35 (31%), Positives = 16/35 (45%), Gaps = 1/35 (2%)
Query: 1 MLNKKHTWTKHWFVLRGCSLLYYRDPK-AEESGVL 34
+ + W + W VLR L Y K +E GV+
Sbjct: 23 LEDATDGWVRRWVVLRRPYLHIYSSEKDGDERGVI 57
>gnl|CDD|241431 cd13277, PH_Bem3, Bud emergence protein 3 (Bem3) Pleckstrin
homology (PH) domain. Bud emergence in Saccharomyces
cerevisiae involves cell cycle-regulated reorganizations
of cortical cytoskeletal elements and requires the
action of the Rho-type GTPase Cdc42. Bem3 contains a
RhoGAP domain and a PH domain. Though Bem3 and Bem2 both
contain a RhoGAP, but only Bem3 is able to stimulate the
hydrolysis of GTP on Cdc42. Bem3 is thought to be the
GAP for Cdc42. PH domains have diverse functions, but in
general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 111
Score = 29.9 bits (68), Expect = 0.26
Identities = 21/99 (21%), Positives = 31/99 (31%), Gaps = 15/99 (15%)
Query: 53 RNFGFQITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVT-----SLSEVPVAR 107
+ W + VL G L Y G L + L N +L +
Sbjct: 14 KKTLGSTGGWKLRYGVLDGNILELYESRG----GQLLESIKLRNAQIERQPNLPDDKYGT 69
Query: 108 NFGFQIT------TWDSKRTILSAVTAGIRNNWMSAIKR 140
GF I + + L A T R+ W+SA+
Sbjct: 70 RHGFLINEHKKSGLSSTTKYYLCAETDKERDEWVSALSE 108
>gnl|CDD|241419 cd13265, PH_evt, Evectin Pleckstrin homology (PH) domain. There
are 2 members of the evectin family (also called
pleckstrin homology domain containing, family B): evt-1
(also called PLEKHB1) and evt-2 (also called PLEKHB2).
evt-1 is specific to the nervous system, where it is
expressed in photoreceptors and myelinating glia. evt-2
is widely expressed in both neural and nonneural
tissues. Evectins possess a single N-terminal PH domain
and a C-terminal hydrophobic region. evt-1 is thought to
function as a mediator of post-Golgi trafficking in
cells that produce large membrane-rich organelles. It is
a candidate gene for the inherited human retinopathy
autosomal dominant familial exudative vitreoretinopathy
and a susceptibility gene for multiple sclerosis. evt-2
is essential for retrograde endosomal membrane transport
from the plasma membrane (PM) to the Golgi. Two membrane
trafficking pathways pass through recycling endosomes: a
recycling pathway and a retrograde pathway that links
the PM to the Golgi/ER. Its PH domain that is unique in
that it specifically recognizes phosphatidylserine (PS),
but not polyphosphoinositides. PS is an anionic
phospholipid class in eukaryotic biomembranes, is highly
enriched in the PM, and plays key roles in various
physiological processes such as the coagulation cascade,
recruitment and activation of signaling molecules, and
clearance of apoptotic cells. PH domains are only found
in eukaryotes. They share little sequence conservation,
but all have a common fold, which is electrostatically
polarized. PH domains have diverse functions, but in
general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 108
Score = 28.8 bits (65), Expect = 0.59
Identities = 24/77 (31%), Positives = 32/77 (41%), Gaps = 15/77 (19%)
Query: 61 TWTKHWFVLRG-CSLLYYRDPKAEESGVLDGVVALN----NVTSLSEV-----PVARNFG 110
W K+WFVL L YY D + ++G + + N+ E P R+
Sbjct: 18 RWKKNWFVLYSDGELSYYEDESRRD---VEGRINMPIECRNIRVGLECRDVQPPEGRSRD 74
Query: 111 --FQITTWDSKRTILSA 125
QI T D KR IL A
Sbjct: 75 CLLQIVTRDGKRLILCA 91
Score = 28.0 bits (63), Expect = 1.2
Identities = 10/25 (40%), Positives = 12/25 (48%), Gaps = 1/25 (4%)
Query: 7 TWTKHWFVLRG-CSLLYYRDPKAEE 30
W K+WFVL L YY D +
Sbjct: 18 RWKKNWFVLYSDGELSYYEDESRRD 42
>gnl|CDD|241290 cd01259, PH_APBB1IP, Amyloid beta (A4) Precursor protein-Binding,
family B, member 1 Interacting Protein pleckstrin
homology (PH) domain. APBB1IP consists of a
Ras-associated (RA) domain, a PH domain, a
family-specific BPS region, and a C-terminal SH2
domain. Grb7, Grb10 and Grb14 are paralogs that are
also present in this hierarchy. These adapter proteins
bind a variety of receptor tyrosine kinases, including
the insulin and insulin-like growth factor-1 (IGF1)
receptors. Grb10 and Grb14 are important
tissue-specific negative regulators of insulin and IGF1
signaling based and may contribute to type 2
(non-insulin-dependent) diabetes in humans. RA-PH
function as a single structural unit and is dimerized
via a helical extension of the PH domain. The PH domain
here are proposed to bind phosphoinositides
non-cannonically ahd are unlikely to bind an activated
GTPase. The tandem RA-PH domains are present in a
second adapter-protein family, MRL proteins,
Caenorhabditis elegans protein MIG-1012, the mammalian
proteins RIAM and lamellipodin and the Drosophila
melanogaster protein Pico12, all of which are
Ena/VASP-binding proteins involved in
actin-cytoskeleton rearrangement. PH domains have
diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They
share little sequence conservation, but all have a
common fold, which is electrostatically polarized. Less
than 10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved
across all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 124
Score = 28.7 bits (65), Expect = 0.60
Identities = 12/21 (57%), Positives = 13/21 (61%), Gaps = 2/21 (9%)
Query: 3 NKKHTWTKHWFVLRGCSLLYY 23
KK W K +FVLR S LYY
Sbjct: 18 GKKS-WKKRYFVLRA-SGLYY 36
Score = 28.0 bits (63), Expect = 1.1
Identities = 10/16 (62%), Positives = 11/16 (68%), Gaps = 1/16 (6%)
Query: 62 WTKHWFVLRGCSLLYY 77
W K +FVLR S LYY
Sbjct: 22 WKKRYFVLRA-SGLYY 36
>gnl|CDD|241264 cd01230, PH1_Tiam1_2, T-lymphoma invasion and metastasis 1 and 2
Pleckstrin Homology (PH) domain, N-terminal domain.
Tiam1 activates Rac GTPases to induce membrane ruffling
and cell motility while Tiam2 (also called STEF (SIF
(still life) and Tiam1 like-exchange factor)
contributes to neurite growth. Tiam1/2 are Dbl-family
of GEFs that possess a Dbl(DH) domain with a PH domain
in tandem. DH-PH domain catalyzes the GDP/GTP exchange
reaction in the GTPase cycle and facillitating the
switch between inactive GDP-bound and active GTP-bound
states. Tiam1/2 possess two PH domains, which are often
referred to as PHn and PHc domains. The DH-PH tandem
domain is made up of the PHc domain while the PHn is
part of a novel N-terminal PHCCEx domain which is made
up of the PHn domain, a coiled coil region(CC), and an
extra region (Ex). PHCCEx mediates binding to plasma
membranes and signalling proteins in the activation of
Rac GTPases. The PH domain resembles the beta-spectrin
PH domain, suggesting non-canonical
phosphatidylinositol binding. CC and Ex form a
positively charged surface for protein binding. There
are 2 motifs in Tiam1/2-interacting proteins that bind
to the PHCCEx domain: Motif-I in CD44, ephrinBs, and
the NMDA receptor and Motif-II in Par3 and JIP2.Neither
of these fall in the PHn domain. PH domains have
diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They
share little sequence conservation, but all have a
common fold, which is electrostatically polarized. Less
than 10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved
across all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 127
Score = 28.9 bits (65), Expect = 0.71
Identities = 10/22 (45%), Positives = 15/22 (68%)
Query: 2 LNKKHTWTKHWFVLRGCSLLYY 23
L + W K+W L+GC+LL+Y
Sbjct: 25 LASRRKWKKYWVTLKGCTLLFY 46
Score = 28.2 bits (63), Expect = 1.0
Identities = 9/16 (56%), Positives = 13/16 (81%)
Query: 62 WTKHWFVLRGCSLLYY 77
W K+W L+GC+LL+Y
Sbjct: 31 WKKYWVTLKGCTLLFY 46
>gnl|CDD|241464 cd13310, PH_RalGPS1_2, Ral GEF with PH domain and SH3 binding
motif 1 and 2 Pleckstrin homology (PH) domain. RalGPS1
(also called Ral GEF with PH domain and SH3 binding
motif 1;RALGEF2/ Ral guanine nucleotide exchange factor
2; RalA exchange factor RalGPS1; Ral guanine nucleotide
exchange factor RalGPS1A2; ras-specific guanine
nucleotide-releasing factor RalGPS1) and RalGPS2 (also
called Ral GEF with PH domain and SH3 binding motif 2;
Ral-A exchange factor RalGPS2; ras-specific guanine
nucleotide-releasing factor RalGPS22). They activate
small GTPase Ral proteins such as RalA and RalB by
stimulating the exchange of Ral bound GDP to GTP,
thereby regulating various downstream cellular
processes. Structurally they contain an N-terminal
Cdc25-like catalytic domain, followed by a PXXP motif
and a C-terminal PH domain. The Cdc25-like catalytic
domain interacts with Ral and its PH domain ensures the
correct membrane localization. Its PXXP motif is
thought to interact with the SH3 domain of Grb2. PH
domains have diverse functions, but in general are
involved in targeting proteins to the appropriate
cellular location or in the interaction with a binding
partner. They share little sequence conservation, but
all have a common fold, which is electrostatically
polarized. Less than 10% of PH domains bind
phosphoinositide phosphates (PIPs) with high affinity
and specificity. PH domains are distinguished from
other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved
across all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 116
Score = 28.4 bits (64), Expect = 0.74
Identities = 8/19 (42%), Positives = 14/19 (73%)
Query: 59 ITTWTKHWFVLRGCSLLYY 77
+++W ++W L G SL+YY
Sbjct: 20 VSSWQRYWVQLWGTSLVYY 38
Score = 27.2 bits (61), Expect = 2.4
Identities = 8/17 (47%), Positives = 12/17 (70%)
Query: 7 TWTKHWFVLRGCSLLYY 23
+W ++W L G SL+YY
Sbjct: 22 SWQRYWVQLWGTSLVYY 38
>gnl|CDD|241451 cd13297, PH3_MyoX-like, Myosin X-like Pleckstrin homology (PH)
domain, repeat 3. MyoX, a MyTH-FERM myosin, is a
molecular motor that has crucial functions in the
transport and/or tethering of integrins in the
actin-based extensions known as filopodia, microtubule
binding, and in netrin-mediated axon guidance. It
functions as a dimer. MyoX walks on bundles of actin,
rather than single filaments, unlike the other
unconventional myosins. MyoX is present in organisms
ranging from humans to choanoflagellates, but not in
Drosophila and Caenorhabditis elegans.MyoX consists of a
N-terminal motor/head region, a neck made of 3 IQ
motifs, and a tail consisting of a coiled-coil domain, a
PEST region, 3 PH domains, a myosin tail homology 4
(MyTH4), and a FERM domain at its very C-terminus. The
first PH domain in the MyoX tail is a split-PH domain,
interupted by the second PH domain such that PH 1a and
PH 1b flanks PH 2. The third PH domain (PH 3) follows
the PH 1b domain. This cd contains the third MyoX PH
repeat. PLEKHH3/Pleckstrin homology (PH) domain
containing, family H (with MyTH4 domain) member 3 is
also part of this CD and like MyoX contains a FERM
domain, a MyTH4 domain, and a single PH domain. Not much
is known about the function of PLEKHH3. PH domains have
diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They share
little sequence conservation, but all have a common
fold, which is electrostatically polarized. Less than
10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 123
Score = 28.5 bits (64), Expect = 0.88
Identities = 23/91 (25%), Positives = 37/91 (40%), Gaps = 6/91 (6%)
Query: 54 NFGFQITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSL--SEVPVARNFGF 111
T K WFVL SL YY+ + + G + LN++ S+ + V + G+
Sbjct: 23 GGKGGNLTKKKRWFVLTPNSLDYYKSSERNALKL--GSLVLNSLCSVVPPDEKVYKETGY 80
Query: 112 -QITTWDSKRT-ILSAVTAGIRNNWMSAIKR 140
T K + L N W++AI+
Sbjct: 81 WTFTVHGRKHSYYLYTKLQEEANRWVNAIQE 111
Score = 28.1 bits (63), Expect = 1.2
Identities = 9/17 (52%), Positives = 10/17 (58%)
Query: 10 KHWFVLRGCSLLYYRDP 26
K WFVL SL YY+
Sbjct: 33 KRWFVLTPNSLDYYKSS 49
>gnl|CDD|241446 cd13292, PH_Osh1p_Osh2p_yeast, Yeast oxysterol binding protein
homologs 1 and 2 Pleckstrin homology (PH) domain. Yeast
Osh1p is proposed to function in postsynthetic sterol
regulation, piecemeal microautophagy of the nucleus, and
cell polarity establishment. Yeast Osh2p is proposed to
function in sterol metabolism and cell polarity
establishment. Both Osh1p and Osh2p contain 3 N-terminal
ankyrin repeats, a PH domain, a FFAT motif (two
phenylalanines in an acidic tract), and a C-terminal
OSBP-related domain. OSBP andOsh1p PH domains
specifically localize to the Golgi apparatus in a
PtdIns4P-dependent manner. Oxysterol binding proteins
are a multigene family that is conserved in yeast,
flies, worms, mammals and plants. In general OSBPs and
ORPs have been found to be involved in the transport and
metabolism of cholesterol and related lipids in
eukaryotes. They all contain a C-terminal oxysterol
binding domain, and most contain an N-terminal PH
domain. OSBP PH domains bind to membrane
phosphoinositides and thus likely play an important role
in intracellular targeting. They are members of the
oxysterol binding protein (OSBP) family which includes
OSBP, OSBP-related proteins (ORP), Goodpasture antigen
binding protein (GPBP), and Four phosphate adaptor
protein 1 (FAPP1). They have a wide range of purported
functions including sterol transport, cell cycle
control, pollen development and vessicle transport from
Golgi recognize both PI lipids and ARF proteins. PH
domains have diverse functions, but in general are
involved in targeting proteins to the appropriate
cellular location or in the interaction with a binding
partner. They share little sequence conservation, but
all have a common fold, which is electrostatically
polarized. Less than 10% of PH domains bind
phosphoinositide phosphates (PIPs) with high affinity
and specificity. PH domains are distinguished from other
PIP-binding domains by their specific high-affinity
binding to PIPs with two vicinal phosphate groups:
PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which
results in targeting some PH domain proteins to the
plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 103
Score = 28.0 bits (63), Expect = 0.92
Identities = 20/76 (26%), Positives = 29/76 (38%), Gaps = 1/76 (1%)
Query: 66 WFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITTWDSKRTILSA 125
WFVL L YYR E S G + + N +S+ F T S + L A
Sbjct: 22 WFVLEDGVLSYYRHQDDEGSAC-RGSINMKNARLVSDPSEKLRFEVSSKTSGSPKWYLKA 80
Query: 126 VTAGIRNNWMSAIKRT 141
W+ A+++
Sbjct: 81 NHPVEAARWIQALQKA 96
Score = 27.7 bits (62), Expect = 1.5
Identities = 10/27 (37%), Positives = 11/27 (40%)
Query: 3 NKKHTWTKHWFVLRGCSLLYYRDPKAE 29
N + WFVL L YYR E
Sbjct: 13 NYAKGYKTRWFVLEDGVLSYYRHQDDE 39
>gnl|CDD|241438 cd13284, PH_OSBP_ORP4, Human Oxysterol binding protein and
OSBP-related protein 4 Pleckstrin homology (PH) domain.
Human OSBP is proposed to function is sterol-dependent
regulation of ERK dephosphorylation and sphingomyelin
synthesis as well as modulation of insulin signaling
and hepatic lipogenesis. It contains a N-terminal PH
domain, a FFAT motif (two phenylalanines in an acidic
tract), and a C-terminal OSBP-related domain. OSBPs and
Osh1p PH domains specifically localize to the Golgi
apparatus in a PtdIns4P-dependent manner. ORP4 is
proposed to function in Vimentin-dependent sterol
transport and/or signaling. Human ORP4 has 2 forms, a
long (ORP4L) and a short (ORP4S). ORP4L contains a
N-terminal PH domain, a FFAT motif (two phenylalanines
in an acidic tract), and a C-terminal OSBP-related
domain. ORP4S is truncated and contains only an
OSBP-related domain. Oxysterol binding proteins are a
multigene family that is conserved in yeast, flies,
worms, mammals and plants. They all contain a
C-terminal oxysterol binding domain, and most contain
an N-terminal PH domain. OSBP PH domains bind to
membrane phosphoinositides and thus likely play an
important role in intracellular targeting. They are
members of the oxysterol binding protein (OSBP) family
which includes OSBP, OSBP-related proteins (ORP),
Goodpasture antigen binding protein (GPBP), and Four
phosphate adaptor protein 1 (FAPP1). They have a wide
range of purported functions including sterol
transport, cell cycle control, pollen development and
vessicle transport from Golgi recognize both PI lipids
and ARF proteins. PH domains have diverse functions,
but in general are involved in targeting proteins to
the appropriate cellular location or in the interaction
with a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved
across all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 99
Score = 27.7 bits (62), Expect = 1.1
Identities = 8/19 (42%), Positives = 11/19 (57%)
Query: 8 WTKHWFVLRGCSLLYYRDP 26
+ + WFVL L YYR+
Sbjct: 15 YQRRWFVLSNGLLSYYRNQ 33
Score = 27.7 bits (62), Expect = 1.1
Identities = 8/19 (42%), Positives = 11/19 (57%)
Query: 62 WTKHWFVLRGCSLLYYRDP 80
+ + WFVL L YYR+
Sbjct: 15 YQRRWFVLSNGLLSYYRNQ 33
>gnl|CDD|185089 PRK15135, PRK15135, histidine/lysine/arginine/ornithine ABC
transporter permease HisQ; Provisional.
Length = 228
Score = 28.2 bits (63), Expect = 1.7
Identities = 18/51 (35%), Positives = 22/51 (43%), Gaps = 7/51 (13%)
Query: 102 EVPVARNFGFQITTWDSKRTIL-----SAVTAGIRNNWMSAIKRTAAMSLL 147
+ A FGF T R I+ GI NNW +K TA +SLL
Sbjct: 123 HIEAATAFGF--TRGQVFRRIMFPAMMRYALPGIGNNWQVILKATALVSLL 171
>gnl|CDD|241395 cd13241, PH2_Kalirin_Trio_p63RhoGEF, p63RhoGEF pleckstrin homology
(PH) domain, repeat 2. The guanine nucleotide exchange
factor p63RhoGEF is an effector of the heterotrimeric G
protein, Galphaq and linking Galphaq-coupled receptors
(GPCRs) to the activation of RhoA. The Dbl(DH) and PH
domains of p63RhoGEF interact with the effector-binding
site and the C-terminal region of Galphaq and appear to
relieve autoinhibition of the catalytic DH domain by the
PH domain. Trio, Duet, and p63RhoGEF are shown to
constitute a family of Galphaq effectors that appear to
activate RhoA both in vitro and in intact cells. Dbs is
a guanine nucleotide exchange factor (GEF), which
contains spectrin repeats, a rhoGEF (DH) domain and a PH
domain. The Dbs PH domain participates in binding to
both the Cdc42 and RhoA GTPases. Trio plays an essential
role in regulating the actin cytoskeleton during axonal
guidance and branching. Trio is a multidomain signaling
protein that contains two RhoGEF(DH)-PH domains in
tandem. PH domains have diverse functions, but in
general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 140
Score = 27.2 bits (61), Expect = 2.6
Identities = 12/50 (24%), Positives = 19/50 (38%), Gaps = 4/50 (8%)
Query: 95 NNVTSLSEVPVARNFGFQITTWDSKRT----ILSAVTAGIRNNWMSAIKR 140
N SL E F + + D + +L A + IR W+ I +
Sbjct: 73 VNKMSLEENVDGDPCRFALRSRDPNKPGESFVLQAPSPEIRQEWVDTINQ 122
>gnl|CDD|180610 PRK06539, PRK06539, ribonucleotide-diphosphate reductase subunit
alpha; Validated.
Length = 822
Score = 28.0 bits (62), Expect = 2.9
Identities = 22/71 (30%), Positives = 36/71 (50%), Gaps = 7/71 (9%)
Query: 80 PKAEESGVLDGVVALNNVTSLSE---VPVARNFGFQITTWDSKRTILSAVTAGIRNNWMS 136
P E S G+V ++++ L VPV N ++ WD+ R + V G+RN +
Sbjct: 565 PNFEGSRWSRGMVPVDSIALLEADRGVPVDVNRTTRLD-WDALR---AKVRGGMRNATLM 620
Query: 137 AIKRTAAMSLL 147
AI TA++ L+
Sbjct: 621 AIAPTASIGLV 631
>gnl|CDD|235386 PRK05279, PRK05279, N-acetylglutamate synthase; Validated.
Length = 441
Score = 27.4 bits (62), Expect = 3.3
Identities = 12/24 (50%), Positives = 14/24 (58%), Gaps = 4/24 (16%)
Query: 52 ARNFG----FQITTWTKHWFVLRG 71
AR G F +TT T HWF+ RG
Sbjct: 388 ARQLGLKRLFVLTTRTAHWFLERG 411
>gnl|CDD|241437 cd13283, PH_GPBP, Goodpasture antigen binding protein Pleckstrin
homology (PH) domain. The GPBP (also called Collagen
type IV alpha-3-binding protein/hCERT; START
domain-containing protein 11/StARD11; StAR-related
lipid transfer protein 11) is a kinase that
phosphorylates an N-terminal region of the alpha 3
chain of type IV collagen, which is commonly known as
the goodpasture antigen. Its splice variant the
ceramide transporter (CERT) mediates the cytosolic
transport of ceramide. There have been additional
splice variants identified, but all of them function as
ceramide transport proteins. GPBP and CERT both contain
an N-terminal PH domain, followed by a serine rich
domain, and a C-terminal START domain. However, GPBP
has an additional serine rich domain just upstream of
its START domain. They are members of the oxysterol
binding protein (OSBP) family which includes OSBP,
OSBP-related proteins (ORP), Goodpasture antigen
binding protein (GPBP), and Four phosphate adaptor
protein 1 (FAPP1). They have a wide range of purported
functions including sterol transport, cell cycle
control, pollen development and vessicle transport from
Golgi recognize both PI lipids and ARF proteins. PH
domains have diverse functions, but in general are
involved in targeting proteins to the appropriate
cellular location or in the interaction with a binding
partner. They share little sequence conservation, but
all have a common fold, which is electrostatically
polarized. Less than 10% of PH domains bind
phosphoinositide phosphates (PIPs) with high affinity
and specificity. PH domains are distinguished from
other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved
across all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 100
Score = 26.4 bits (59), Expect = 3.5
Identities = 8/19 (42%), Positives = 12/19 (63%)
Query: 6 HTWTKHWFVLRGCSLLYYR 24
H W +FVL+ +L YY+
Sbjct: 13 HGWQDRYFVLKDGTLSYYK 31
>gnl|CDD|241285 cd01254, PH_PLD, Phospholipase D pleckstrin homology (PH) domain.
PLD hydrolyzes phosphatidylcholine to phosphatidic
acid (PtdOH), which can bind target proteins. PLD
contains a PH domain, a PX domain and four conserved
PLD signature domains. The PLD PH domain is specific
for bisphosphorylated inositides. PH domains have
diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They
share little sequence conservation, but all have a
common fold, which is electrostatically polarized. Less
than 10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved
across all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 134
Score = 26.5 bits (59), Expect = 4.0
Identities = 11/33 (33%), Positives = 17/33 (51%), Gaps = 3/33 (9%)
Query: 5 KHTWTKHWFVLRGCSLLYYRDPKAEESGVLDGV 37
W+K WF+++ L Y DP +SG + V
Sbjct: 54 CSRWSKRWFIVKDSFLAYVDDP---DSGKILDV 83
Score = 26.1 bits (58), Expect = 5.5
Identities = 11/40 (27%), Positives = 18/40 (45%), Gaps = 3/40 (7%)
Query: 52 ARNFGFQITTWTKHWFVLRGCSLLYYRDPKAEESGVLDGV 91
+ W+K WF+++ L Y DP +SG + V
Sbjct: 47 CCCCKSMCSRWSKRWFIVKDSFLAYVDDP---DSGKILDV 83
>gnl|CDD|236264 PRK08432, PRK08432, flagellar motor switch protein FliY; Validated.
Length = 283
Score = 26.9 bits (60), Expect = 4.8
Identities = 13/32 (40%), Positives = 16/32 (50%), Gaps = 5/32 (15%)
Query: 89 DGVVALNNVTSLSEVPVARNFGFQITTWDSKR 120
D V+A V V V NFG QIT +K+
Sbjct: 249 DKVIAKGEV-----VIVDGNFGIQITEIGTKK 275
>gnl|CDD|241449 cd13295, PH_EFA6, Exchange Factor for ARF6 Pleckstrin homology (PH)
domain. EFA6 (also called PSD/pleckstrin and Sec7
domain containing) is an guanine nucleotide exchange
factor for ADP ribosylation factor 6 (ARF6), which is
involved in membrane recycling. EFA6 has four
structurally related polypeptides: EFA6A, EFA6B, EFA6C
and EFA6D. It consists of a N-terminal proline rich
region (PR), a SEC7 domain, a PH domain, a PR, a
coiled-coil region, and a C-terminal PR. The EFA6 PH
domain regulates its association with the plasma
membrane. EFA6 activates Arf6 through its Sec7 catalytic
domain and modulates this activity through its
C-terminal domain, which rearranges the actin
cytoskeleton in fibroblastic cell lines. PH domains have
diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They share
little sequence conservation, but all have a common
fold, which is electrostatically polarized. Less than
10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved across
all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 126
Score = 26.1 bits (58), Expect = 5.6
Identities = 19/91 (20%), Positives = 34/91 (37%), Gaps = 9/91 (9%)
Query: 61 TWTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVT----SLSEVPV---ARNFGFQI 113
W + L+G L ++D + + +L N SL+E + F++
Sbjct: 31 GWKMFYATLKGLVLYLHKDEYGCKKQLSY--ESLRNAISVHHSLAEKATDYTKKPHVFRL 88
Query: 114 TTWDSKRTILSAVTAGIRNNWMSAIKRTAAM 144
T D + + A +W+ AI AA
Sbjct: 89 QTADWREFLFQASDTEEMQSWIEAINLVAAA 119
>gnl|CDD|241422 cd13268, PH_Brdg1, BCR downstream signaling 1 Pleckstrin homology
(PH) domain. Brdg1 is thought to function as a docking
protein acting downstream of Tec, a protein tyrosine
kinases (PTK), in B-cell antigen receptor (BCR)
signaling. BRDG1 contains a proline-rich (PR) motif
which is thought to bind SH3 or WW domains, a PH
domain, and multiple tyrosine residues which are
potential target sites for SH2 domains. Since PH
domains bind phospholipids it is thought to be involved
in the tethering of Tec and BRDG1 to the cell
membrane.Tec and Pyk2, but not Btk, Bmx, Lyn, Syk, or
c-Abl, induces phosphorylation of BRDG1 on tyrosine
residues. Efficient phosphorylation requires both the
PH and SH2 domains of BRDG1 and the kinase domain of
Tec. The overexpression of BRDG1 increases
theBCR-mediated activation of cAMP-response element
binding protein (CREB). Phosphorylated BRDG1 is
hypothesized to recruit CREB either directly or through
its recruitment of downstream effectors which then
recruit CREB. PH domains have diverse functions, but in
general are involved in targeting proteins to the
appropriate cellular location or in the interaction
with a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH
domains bind phosphoinositide phosphates (PIPs) with
high affinity and specificity. PH domains are
distinguished from other PIP-binding domains by their
specific high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved
across all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 127
Score = 26.2 bits (58), Expect = 5.9
Identities = 9/27 (33%), Positives = 13/27 (48%)
Query: 56 GFQITTWTKHWFVLRGCSLLYYRDPKA 82
+ + K W LRG +L +Y D K
Sbjct: 22 RSKDREFRKLWTELRGTTLFFYNDKKD 48
Score = 25.5 bits (56), Expect = 9.3
Identities = 10/25 (40%), Positives = 13/25 (52%)
Query: 4 KKHTWTKHWFVLRGCSLLYYRDPKA 28
K + K W LRG +L +Y D K
Sbjct: 24 KDREFRKLWTELRGTTLFFYNDKKD 48
>gnl|CDD|241411 cd13257, PH4_ARAP, ArfGAP with RhoGAP domain, ankyrin repeat and
PH domain Pleckstrin homology (PH) domain, repeat 4.
ARAP proteins (also called centaurin delta) are
phosphatidylinositol 3,4,5-trisphosphate-dependent
GTPase-activating proteins that modulate actin
cytoskeleton remodeling by regulating ARF and RHO
family members. They bind phosphatidylinositol
3,4,5-trisphosphate (PtdIns(3,4,5)P3) and
phosphatidylinositol 3,4-bisphosphate (PtdIns(3,4,5)P2)
binding. There are 3 mammalian ARAP proteins: ARAP1,
ARAP2, and ARAP3. All ARAP proteins contain a
N-terminal SAM (sterile alpha motif) domain, 5 PH
domains, an ArfGAP domain, 2 ankyrin domain, A RhoGap
domain, and a Ras-associating domain. This hierarchy
contains the fourth PH domain in ARAP. PH domains have
diverse functions, but in general are involved in
targeting proteins to the appropriate cellular location
or in the interaction with a binding partner. They
share little sequence conservation, but all have a
common fold, which is electrostatically polarized. Less
than 10% of PH domains bind phosphoinositide phosphates
(PIPs) with high affinity and specificity. PH domains
are distinguished from other PIP-binding domains by
their specific high-affinity binding to PIPs with two
vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2
or PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved
across all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 95
Score = 25.6 bits (56), Expect = 6.6
Identities = 9/25 (36%), Positives = 13/25 (52%), Gaps = 1/25 (4%)
Query: 8 WTKHWFVLRGCSLLYY-RDPKAEES 31
W + WF L G SL ++ + EE
Sbjct: 18 WREGWFALEGSSLYFFLEGSEQEEL 42
Score = 25.6 bits (56), Expect = 6.6
Identities = 9/25 (36%), Positives = 13/25 (52%), Gaps = 1/25 (4%)
Query: 62 WTKHWFVLRGCSLLYY-RDPKAEES 85
W + WF L G SL ++ + EE
Sbjct: 18 WREGWFALEGSSLYFFLEGSEQEEL 42
>gnl|CDD|241421 cd13267, PH_DOCK-D, Dedicator of cytokinesis-D subfamily Pleckstrin
homology (PH) domain. DOCK-D subfamily (also called
Zizimin subfamily) consists of Dock9/Zizimin1,
Dock10/Zizimin3, and Dock11/Zizimin2. DOCK-D has a
N-terminal DUF3398 domain, a PH-like domain, a Dock
Homology Region 1, DHR1 (also called CZH1), a C2 domain,
and a C-terminal DHR2 domain (also called CZH2).
Zizimin1 is enriched in the brain, lung, and kidney;
zizimin2 is found in B and T lymphocytes, and zizimin3
is enriched in brain, lung, spleen and thymus. Zizimin1
functions in autoinhibition and membrane targeting.
Zizimin2 is an immune-related and age-regulated guanine
nucleotide exchange factor, which facilitates filopodial
formation through activation of Cdc42, which results in
activation of cell migration. No function has been
determined for Zizimin3 to date. The N-terminal half of
zizimin1 binds to the GEF domain through three distinct
areas, including CZH1, to inhibit the interaction with
Cdc42. In addition its PH domain binds phosphoinositides
and mediates zizimin1 membrane targeting. DOCK is a
family of proteins involved in intracellular signalling
networks. They act as guanine nucleotide exchange
factors for small G proteins of the Rho family, such as
Rac and Cdc42. There are 4 subfamilies of DOCK family
proteins based on their sequence homology: A-D. PH
domains have diverse functions, but in general are
involved in targeting proteins to the appropriate
cellular location or in the interaction with a binding
partner. They share little sequence conservation, but
all have a common fold, which is electrostatically
polarized. Less than 10% of PH domains bind
phosphoinositide phosphates (PIPs) with high affinity
and specificity. PH domains are distinguished from other
PIP-binding domains by their specific high-affinity
binding to PIPs with two vicinal phosphate groups:
PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which
results in targeting some PH domain proteins to the
plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 125
Score = 25.7 bits (57), Expect = 6.8
Identities = 19/82 (23%), Positives = 42/82 (51%), Gaps = 8/82 (9%)
Query: 64 KHWFVLRGCS-----LLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFGFQITTWDS 118
+ +F L+ L +Y+D K++E+ G + L++ T + + R F F++ D
Sbjct: 32 RRFFHLKQLVDGSYILEFYKDEKSKEA---KGTIYLDSCTGVVQNSKRRKFCFELRMQDG 88
Query: 119 KRTILSAVTAGIRNNWMSAIKR 140
K +L+A + ++W+S + +
Sbjct: 89 KSYVLAAESESEMDDWISKLNK 110
>gnl|CDD|241403 cd13249, PH_anillin_2, Anillin Pleckstrin homology (PH) domain.
Anillin is an actin binding protein involved in
cytokinesis. It has a C-terminal PH domain, which has
been shown to be necessary, but not sufficient for
targetting of anillin to ectopic septin containing
foci. PH domains have diverse functions, but in general
are involved in targeting proteins to the appropriate
cellular location or in the interaction with a binding
partner. They share little sequence conservation, but
all have a common fold, which is electrostatically
polarized. Less than 10% of PH domains bind
phosphoinositide phosphates (PIPs) with high affinity
and specificity. PH domains are distinguished from
other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal
phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or
PtdIns(3,4,5)P3 which results in targeting some PH
domain proteins to the plasma membrane. A few display
strong specificity in lipid binding. Any specificity is
usually determined by loop regions or insertions in the
N-terminus of the domain, which are not conserved
across all PH domains. PH domains are found in cellular
signaling proteins such as serine/threonine kinase,
tyrosine kinases, regulators of G-proteins, endocytotic
GTPases, adaptors, as well as cytoskeletal associated
molecules and in lipid associated enzymes.
Length = 111
Score = 25.8 bits (57), Expect = 7.2
Identities = 14/48 (29%), Positives = 25/48 (52%), Gaps = 5/48 (10%)
Query: 6 HTWTKHWFVLRGCSLLYYRDP---KAEESGVLDGVVALNNVTSLSEVP 50
+WT+ + VL+G +LL Y P +A+ +L + +N T + V
Sbjct: 18 QSWTRLYCVLKGGNLLCYYSPEEIEAKVEPLL--TIPINKDTRIRAVD 63
Score = 25.4 bits (56), Expect = 9.2
Identities = 14/49 (28%), Positives = 26/49 (53%), Gaps = 5/49 (10%)
Query: 59 ITTWTKHWFVLRGCSLLYYRDP---KAEESGVLDGVVALNNVTSLSEVP 104
+ +WT+ + VL+G +LL Y P +A+ +L + +N T + V
Sbjct: 17 LQSWTRLYCVLKGGNLLCYYSPEEIEAKVEPLL--TIPINKDTRIRAVD 63
>gnl|CDD|241428 cd13274, PH_DGK_type2, Type 2 Diacylglycerol kinase Pleckstrin
homology (PH) domain. DGK (also called DAGK) catalyzes
the conversion of diacylglycerol (DAG) to phosphatidic
acid (PA) utilizing ATP as a source of the phosphate. In
non-stimulated cells, DGK activity is low and DAG is
used for glycerophospholipid biosynthesis. Upon receptor
activation of the phosphoinositide pathway, DGK activity
increases which drives the conversion of DAG to PA. DGK
acts as a switch by terminating the signalling of one
lipid while simultaneously activating signalling by
another. There are 9 mammalian DGK isoforms all with
conserved catalytic domains and two cysteine rich
domains. These are further classified into 5 groups
according to the presence of additional functional
domains and substrate specificity: Type 1 - DGK-alpha,
DGK-beta, DGK-gamma - contain EF-hand motifs and a
recoverin homology domain; Type 2 - DGK-delta, DGK-eta,
and DGK-kappa- contain a pleckstrin homology domain, two
cysteine-rich zinc finger-like structures, and a
separated catalytic region; Type 3 - DGK-epsilon - has
specificity for arachidonate-containing DAG; Type 4 -
DGK-zeta, DGK-iota- contain a MARCKS homology domain,
ankyrin repeats, a C-terminal nuclear localization
signal, and a PDZ-binding motif; Type 5 - DGK-theta -
contains a third cysteine-rich domain, a pleckstrin
homology domain and a proline rich region. The type 2
DGKs are present as part of this Metazoan DGK hierarchy.
They have a N-terminal PH domain, two cysteine rich
domains, followed by bipartite catalytic domains, and a
C-terminal SAM domain. Their catalytic domains and
perhaps other DGK catalytic domains may function as two
independent units in a coordinated fashion. They may
also require other motifs for maximal activity because
several DGK catalytic domains have very little DAG
kinase activity when expressed as isolated subunits. PH
domains have diverse functions, but in general are
involved in targeting proteins to the appropriate
cellular location or in the interaction with a binding
partner. They share little sequence conservation, but
all have a common fold, which is electrostatically
polarized. Less than 10% of PH domains bind
phosphoinositide phosphates (PIPs) with high affinity
and specificity. PH domains are distinguished from other
PIP-binding domains by their specific high-affinity
binding to PIPs with two vicinal phosphate groups:
PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which
results in targeting some PH domain proteins to the
plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 97
Score = 25.4 bits (56), Expect = 8.3
Identities = 27/84 (32%), Positives = 38/84 (45%), Gaps = 17/84 (20%)
Query: 62 WTKHWFVLRGCSLLYYRDPKAEESGVLDGVVALNNVTSLSEVPVAR------NFGFQITT 115
W K +F LRG +L Y +D K S + D V LS+ VA N F + T
Sbjct: 16 WKKRYFKLRGRTLYYAKDSK---SLIFDEV-------DLSDASVAECSTKNVNHSFTVIT 65
Query: 116 WDSKRTILSAVTAGIRNNWMSAIK 139
++ IL A + W+SA+K
Sbjct: 66 -PFRKLILCAESRKEMEEWISALK 88
>gnl|CDD|241536 cd13385, PH_Gab3, Grb2-associated binding protein 3 pleckstrin
homology (PH) domain. The Gab subfamily includes
several Gab proteins, Drosophila DOS and C. elegans
SOC-1. They are scaffolding adaptor proteins, which
possess N-terminal PH domains and a C-terminus with
proline-rich regions and multiple phosphorylation sites.
Following activation of growth factor receptors, Gab
proteins are tyrosine phosphorylated and activate PI3K,
which generates 3-phosphoinositide lipids. By binding to
these lipids via the PH domain, Gab proteins remain in
proximity to the receptor, leading to further signaling.
While not all Gab proteins depend on the PH domain for
recruitment, it is required for Gab activity. The
members in this cd include the Gab1, Gab2, and Gab3
proteins. PH domains have diverse functions, but in
general are involved in targeting proteins to the
appropriate cellular location or in the interaction with
a binding partner. They share little sequence
conservation, but all have a common fold, which is
electrostatically polarized. Less than 10% of PH domains
bind phosphoinositide phosphates (PIPs) with high
affinity and specificity. PH domains are distinguished
from other PIP-binding domains by their specific
high-affinity binding to PIPs with two vicinal phosphate
groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3
which results in targeting some PH domain proteins to
the plasma membrane. A few display strong specificity in
lipid binding. Any specificity is usually determined by
loop regions or insertions in the N-terminus of the
domain, which are not conserved across all PH domains.
PH domains are found in cellular signaling proteins such
as serine/threonine kinase, tyrosine kinases, regulators
of G-proteins, endocytotic GTPases, adaptors, as well as
cytoskeletal associated molecules and in lipid
associated enzymes.
Length = 125
Score = 25.6 bits (56), Expect = 9.0
Identities = 22/91 (24%), Positives = 36/91 (39%), Gaps = 19/91 (20%)
Query: 4 KKHTWTKHWFVLRGCS-------LLYYRDPKAEESGVLDGVVALNNVTSLSEVPVARNFG 56
K++ W K WFVLR L YYR+ +++ V L+E V ++ G
Sbjct: 22 KRYAWRKRWFVLRRGRMSGNPDVLEYYRNKHSKKP---------IRVIDLNECEVTKHAG 72
Query: 57 FQITT---WTKHWFVLRGCSLLYYRDPKAEE 84
F+++ + +Y K EE
Sbjct: 73 VNFIKKEFQNNFVFIVKTTTRTFYLVAKTEE 103
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 0.130 0.401
Gapped
Lambda K H
0.267 0.0618 0.140
Matrix: BLOSUM62
Gap Penalties: Existence: 11, Extension: 1
Number of Sequences: 44354
Number of Hits to DB: 7,910,199
Number of extensions: 686591
Number of successful extensions: 645
Number of sequences better than 10.0: 1
Number of HSP's gapped: 627
Number of HSP's successfully gapped: 127
Length of query: 160
Length of database: 10,937,602
Length adjustment: 89
Effective length of query: 71
Effective length of database: 6,990,096
Effective search space: 496296816
Effective search space used: 496296816
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 (21.8 bits)
S2: 55 (25.2 bits)