RPS-BLAST 2.2.26 [Sep-21-2011]
Database: CDD.v3.10
44,354 sequences; 10,937,602 total letters
Searching..................................................done
Query= psy3487
(538 letters)
>gnl|CDD|216381 pfam01237, Oxysterol_BP, Oxysterol-binding protein.
Length = 335
Score = 232 bits (594), Expect = 7e-72
Identities = 102/276 (36%), Positives = 135/276 (48%), Gaps = 49/276 (17%)
Query: 113 ALVAAFSTSAYSTT-AVRTGKPFNPLLGETYECDRTADAGWKAFSEQVSHHPPIAAQYVE 171
VAAF+ S YS+T RT KPFNPLLGET+E R D G++ SEQVSHHPPI+A + E
Sbjct: 38 LYVAAFAVSTYSSTRKRRTKKPFNPLLGETFELVRE-DGGFRFISEQVSHHPPISAYHAE 96
Query: 172 GKAWKAWQDLAVHSKFRGKYIQVTPAGRFNLVFTKSNQHYTWNRVQSTVHNVIVGNLWVD 231
K W W A SKF GK I+V P G +L K+ +HYTW + + +HN+I G +V+
Sbjct: 97 SKGWTLWGSSAPKSKFWGKSIEVKPEGHAHLTLKKTGEHYTWTKPTTHIHNIIFGKPYVE 156
Query: 232 QHGESDVINVTTGSTCRLTFYPYSYFSRQTQRRVLPWKPNTPRRSIIPEKPPGSMQIWSI 291
+GE + N TTG + F +FS + N ++
Sbjct: 157 LYGEMYIKNSTTGYKAVIEFKKKGWFSG---------RKN---------------EVEGK 192
Query: 292 LKNSIGKDLSTIPMPLNFSEPLSMLQRLTEDFEYAHVLDEAAATDDVFRA-------PQY 344
+ + GK L TI + E V +++A +
Sbjct: 193 VYDKKGKVLYTI------------SGKWNESLYIKKVKSSTGEKKLLWKANPLPPNSEKV 240
Query: 345 YCFTKFACQLNEL----EEGVAPTDSRLRPDQRLLE 376
Y FTKFA LNEL +E + PTDSRLRPDQR LE
Sbjct: 241 YGFTKFAIPLNELTPELKEELPPTDSRLRPDQRALE 276
Score = 100 bits (252), Expect = 2e-23
Identities = 54/143 (37%), Positives = 67/143 (46%), Gaps = 34/143 (23%)
Query: 306 PLNFSEPLSMLQRLTEDFEYAHVLDEAAATDDVF-RAPQYYCF-TKFACQ---------- 353
P+ F+EPLS+LQRL ED EY +LD+AA DD R + FA
Sbjct: 1 PVFFNEPLSLLQRLAEDLEYPDLLDKAAKEDDPLERM----LYVAAFAVSTYSSTRKRRT 56
Query: 354 -------LNELEEGVAPTDSRLRPDQ--RLL--EVSHHPPIAAQYVEGKAWKAWQDLAVH 402
L E E V R D R + +VSHHPPI+A + E K W W A
Sbjct: 57 KKPFNPLLGETFELV-------REDGGFRFISEQVSHHPPISAYHAESKGWTLWGSSAPK 109
Query: 403 SKFRGKYIQVTPAGRFNLVFTKS 425
SKF GK I+V P G +L K+
Sbjct: 110 SKFWGKSIEVKPEGHAHLTLKKT 132
>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 = 197 bits (503), Expect = 9e-62
Identities = 78/93 (83%), Positives = 86/93 (92%), Gaps = 1/93 (1%)
Query: 18 MKGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTEDSCTFI 77
KGWL KWTNYLKGYQ+RWFVLSNGLLSYYRNQAEM+HTCRGTI+L GA+I TEDSC F+
Sbjct: 1 FKGWLLKWTNYLKGYQRRWFVLSNGLLSYYRNQAEMAHTCRGTINLAGALIHTEDSCNFV 60
Query: 78 ISNG-VQTFHIKASNEVERQRWVTALELAKSKA 109
ISNG QTFH+KAS+EVERQRWVTALELAK+KA
Sbjct: 61 ISNGGTQTFHLKASSEVERQRWVTALELAKAKA 93
>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 = 115 bits (290), Expect = 6e-31
Identities = 43/92 (46%), Positives = 63/92 (68%), Gaps = 2/92 (2%)
Query: 18 MKGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTE--DSCT 75
++G L KWTNY+ G+Q R+FVL +G LSYY+++ E + CRG+ISLR A+I+ D C
Sbjct: 1 LRGVLSKWTNYIHGWQDRYFVLKDGTLSYYKSEDETQYGCRGSISLRKAVIKPHEFDECR 60
Query: 76 FIISNGVQTFHIKASNEVERQRWVTALELAKS 107
F +S ++++A + ERQRWV ALE K+
Sbjct: 61 FDVSVNDSVWYLRAESPEERQRWVDALEAHKA 92
>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 = 106 bits (266), Expect = 1e-27
Identities = 41/100 (41%), Positives = 64/100 (64%), Gaps = 5/100 (5%)
Query: 17 EMKGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQT--EDSC 74
MKG+L KWTNY KGY+ RWFVL +G+LSYYR+Q + CRG+I+++ A + + +
Sbjct: 3 TMKGYLKKWTNYAKGYKTRWFVLEDGVLSYYRHQDDEGSACRGSINMKNARLVSDPSEKL 62
Query: 75 TFIISNGVQT---FHIKASNEVERQRWVTALELAKSKARQ 111
F +S+ +++KA++ VE RW+ AL+ A A+
Sbjct: 63 RFEVSSKTSGSPKWYLKANHPVEAARWIQALQKAIEWAKD 102
>gnl|CDD|241444 cd13290, PH_ORP9, Human Oxysterol binding protein related protein 9
Pleckstrin homology (PH) domain. Human ORP9 is proposed
to function in regulation of Akt phosphorylation. ORP9
has 2 forms, a long (ORP9L) and a short (ORP9S). ORP9L
contains an N-terminal PH domain, a FFAT motif (two
phenylalanines in an acidic tract), and a C-terminal
OSBP-related domain. ORP1S is truncated and contains a
FFAT motif and an OSBP-related domain. 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 = 102
Score = 97.5 bits (243), Expect = 2e-24
Identities = 45/105 (42%), Positives = 63/105 (60%), Gaps = 8/105 (7%)
Query: 18 MKGWLFKWTNYLKGYQKRWFVLSN--GLLSYYRNQAEMSHTC-RGTISLRGAI--IQTED 72
M+G L KWTN +KG+Q RWFVL + GLLSYY ++ +M RG + L+GA+ I ED
Sbjct: 1 MEGPLSKWTNVMKGWQYRWFVLDDNAGLLSYYTSKEKMMRGSRRGCVRLKGAVIGIDDED 60
Query: 73 SCTFIISNGVQTFHIKASNEVERQRWVTALELAKSKARQHALVAA 117
TF I+ +TFH +A + ER+RW+ ALE +H+
Sbjct: 61 DSTFTITVDQKTFHFQARDAEERERWIRALEDTI---LRHSQQYQ 102
>gnl|CDD|241278 cd01247, PH_FAPP1_FAPP2, Four phosphate adaptor protein 1 and 2
Pleckstrin homology (PH) domain. Human FAPP1 (also
called PLEKHA3/Pleckstrin homology domain-containing,
family A member 3) regulates secretory transport from
the trans-Golgi network to the plasma membrane. It is
recruited through binding of PH domain to
phosphatidylinositol 4-phosphate (PtdIns(4)P) and a
small GTPase ADP-ribosylation factor 1 (ARF1). These two
binding sites have little overlap the FAPP1 PH domain to
associate with both ligands simultaneously and
independently. FAPP1 has a N-terminal PH domain followed
by a short proline-rich region. FAPP1 is a member of the
oxysterol binding protein (OSBP) family which includes
OSBP, OSBP-related proteins (ORP), and Goodpasture
antigen binding protein (GPBP). 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.
FAPP2 (also called PLEKHA8/Pleckstrin homology
domain-containing, family A member 8), a member of the
Glycolipid lipid transfer protein(GLTP) family has an
N-terminal PH domain that targets the TGN and C-terminal
GLTP domain. FAPP2 functions to traffic glucosylceramide
(GlcCer) which is made in the Golgi. It's interaction
with vesicle-associated membrane protein-associated
protein (VAP) could be a means of regulation. Some
FAPP2s share the FFAT-like motifs found in GLTP. 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 = 96.3 bits (240), Expect = 4e-24
Identities = 44/94 (46%), Positives = 62/94 (65%), Gaps = 3/94 (3%)
Query: 18 MKGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTE--DSCT 75
M+G L+KWTNYL G+Q RWFVL +G+LSYY++Q E+ C+G+I + I D+
Sbjct: 1 MEGVLYKWTNYLSGWQPRWFVLDDGVLSYYKSQEEVDQGCKGSIKMSVCEIIVHPTDNTR 60
Query: 76 F-IISNGVQTFHIKASNEVERQRWVTALELAKSK 108
+I G Q F++KAS+ ERQRW+ AL AK+
Sbjct: 61 MDLIIPGEQHFYLKASSAAERQRWLVALGSAKAC 94
>gnl|CDD|241445 cd13291, PH_ORP10_ORP11, Human Oxysterol binding protein (OSBP)
related proteins 10 and 11 (ORP10 and ORP11) Pleckstrin
homology (PH) domain. Human ORP10 is involvedt in
intracellular transport or organelle positioning and is
proposed to function as a regulator of cellular lipid
metabolism. Human ORP11 localizes at the Golgi-late
endosome interface and is thought to form a dimer with
ORP9 functioning as an intracellular lipid sensor or
transporter. Both ORP10 and ORP11 contain a N-terminal
PH domain, a FFAT motif (two phenylalanines in an acidic
tract), and a C-terminal OSBP-related domain. 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 = 107
Score = 80.8 bits (200), Expect = 2e-18
Identities = 36/91 (39%), Positives = 56/91 (61%), Gaps = 7/91 (7%)
Query: 18 MKGWLFKWTNYLKGYQKRWFVLSN--GLLSYYRNQAEMSHTCRGTISLRGAII--QTEDS 73
++G L K+TN +KG+Q RWFVL G L Y+ ++ + RG++ L GA+I EDS
Sbjct: 1 LEGQLSKYTNVVKGWQNRWFVLDPEAGSLEYFVSEESKNQKPRGSLPLAGAVISPSDEDS 60
Query: 74 CTFII--SNGVQTFHIKASNEVERQRWVTAL 102
TF + +NG + + ++A++ ERQ WV L
Sbjct: 61 HTFTVNAANG-EMYKLRAADAKERQEWVNRL 90
>gnl|CDD|215766 pfam00169, PH, PH domain. PH stands for pleckstrin homology.
Length = 101
Score = 79.4 bits (196), Expect = 4e-18
Identities = 31/100 (31%), Positives = 50/100 (50%), Gaps = 9/100 (9%)
Query: 17 EMKGWLFKWT-NYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTEDS-- 73
+GWL K K ++KR+FVL +G+L YY++ + S +G+I L G +
Sbjct: 2 IKEGWLLKKGSGGRKSWKKRYFVLFDGVLLYYKDSKKSSSRPKGSIPLSGCQVTKVPDSE 61
Query: 74 -----CTF-IISNGVQTFHIKASNEVERQRWVTALELAKS 107
F I + +TF ++A +E ER+ WV A+ A
Sbjct: 62 DGKRKNCFEIRTGDRETFLLQAESEEERKEWVKAIRSAIR 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 = 77.2 bits (190), Expect = 2e-17
Identities = 31/100 (31%), Positives = 56/100 (56%), Gaps = 10/100 (10%)
Query: 18 MKGWLFKWT-NYLKGYQKRWFVLSNGLLSYYRN-QAEMSHTCRGTISLRGAIIQT----- 70
+GWL+K + K ++KR+FVL N L YY++ + + S+ +G+I L G ++
Sbjct: 3 KEGWLYKKSGGGKKSWKKRYFVLFNSTLLYYKSKKDKKSYKPKGSIDLSGCTVREAPDPD 62
Query: 71 --EDSCTF-IISNGVQTFHIKASNEVERQRWVTALELAKS 107
+ F I ++ +T ++A +E ER++WV AL A +
Sbjct: 63 SSKKPHCFEIKTSDRKTLLLQAESEEEREKWVEALRKAIA 102
>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 = 69.3 bits (169), Expect = 1e-14
Identities = 27/92 (29%), Positives = 49/92 (53%), Gaps = 8/92 (8%)
Query: 18 MKGWLFKWTNY-LKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAI-----IQTE 71
+GWL K LK ++KRWFVL + +L YY+++ + S +G I L + +
Sbjct: 1 KEGWLKKRGGKGLKSWKKRWFVLFDDVLLYYKSKKDSSKKPKGLIPLSDGLEVELVSSSG 60
Query: 72 DSCTFII--SNGVQTFHIKASNEVERQRWVTA 101
F + + +T++++A +E ER+ W+ A
Sbjct: 61 KPNCFELVTPDRGRTYYLQAESEEEREEWLEA 92
>gnl|CDD|241447 cd13293, PH_CpORP2-like, Cryptosporidium-like Oxysterol binding
protein related protein 2 Pleckstrin homology (PH)
domain. There are 2 types of ORPs found in
Cryptosporidium: CpORP1 and CpORP2. Cryptosporium
differs from other apicomplexans like Plasmodium,
Toxoplasma, and Eimeria which possess only a single
long-type ORP consisting of an N-terminal PH domain
followed by a C-terminal ligand binding (LB) domain.
CpORP2 is like this, but CpORP1 differs and has a
truncated N-terminus resulting in only having a LB
domain present. The exact functions of these proteins
are largely unknown though CpORP1 is thought to be
involved in lipid transport across the parasitophorous
vacuole membrane. 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 = 88
Score = 65.0 bits (159), Expect = 3e-13
Identities = 29/90 (32%), Positives = 49/90 (54%), Gaps = 5/90 (5%)
Query: 18 MKGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGA--IIQTEDSCT 75
M+G+L KWTN ++ R+F+L G+L Y + + +GTI L+ + +D
Sbjct: 1 MEGYLKKWTNIFNSWKPRYFILYPGILCYSKQKGGPK---KGTIHLKICDIRLVPDDPLR 57
Query: 76 FIISNGVQTFHIKASNEVERQRWVTALELA 105
II+ G H++AS+ E+ +W AL+ A
Sbjct: 58 IIINTGTNQLHLRASSVEEKLKWYNALKYA 87
>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 = 65.5 bits (160), Expect = 4e-13
Identities = 31/96 (32%), Positives = 52/96 (54%), Gaps = 7/96 (7%)
Query: 13 HSDAEMKGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRG--AIIQT 70
SD E GWL K +K +++RWFVL G L Y++++ S RG I L +
Sbjct: 4 WSDPEKAGWLTKQGGSIKTWRRRWFVLKQGKLFYFKDEDPDSEP-RGVIDLSDCLTVKSA 62
Query: 71 EDSC----TFIISNGVQTFHIKASNEVERQRWVTAL 102
E++ F +S +TF++ A +E E++ W++A+
Sbjct: 63 EEATNKEFAFEVSTPERTFYLIADSEKEKEEWISAI 98
>gnl|CDD|241448 cd13294, PH_ORP_plant, Plant Oxysterol binding protein related
protein Pleckstrin homology (PH) domain. Plant ORPs
contain a N-terminal PH domain and a C-terminal
OSBP-related domain. Not much is known about its
specific function in plants to date. Members here
include: Arabidopsis, spruce, and petunia. 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 = 100
Score = 64.8 bits (158), Expect = 5e-13
Identities = 34/89 (38%), Positives = 51/89 (57%), Gaps = 2/89 (2%)
Query: 20 GWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQ--TEDSCTFI 77
G L+KW NY KG++ RWFVL +G+LSYY+ G + L+ + I+ D F
Sbjct: 3 GILYKWVNYGKGWRSRWFVLQDGVLSYYKVHGPDKVKPSGEVHLKVSSIRESRSDDKKFY 62
Query: 78 ISNGVQTFHIKASNEVERQRWVTALELAK 106
I G +T H++A + +R W+ AL+ AK
Sbjct: 63 IFTGTKTLHLRAESREDRAAWLEALQAAK 91
>gnl|CDD|241443 cd13289, PH_Osh3p_yeast, Yeast oxysterol binding protein homolog 3
Pleckstrin homology (PH) domain. Yeast Osh3p is
proposed to function in sterol transport and regulation
of nuclear fusion during mating and of pseudohyphal
growth as well as sphingolipid metabolism. Osh3 contains
a N-GOLD (Golgi dynamics) domain, a PH domain, a FFAT
motif (two phenylalanines in an acidic tract), and a
C-terminal OSBP-related domain. GOLD domains are thought
to mediate protein-protein interactions, but their role
in ORPs are unknown. 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 = 90
Score = 64.2 bits (157), Expect = 6e-13
Identities = 33/88 (37%), Positives = 46/88 (52%), Gaps = 7/88 (7%)
Query: 20 GWLFKWT-NYLKGYQKRWFVL--SNGLLSYYRNQAEMSHTCRGTISLRGAIIQT-EDSCT 75
GWL K ++G+ +R+FVL G LSYY N + RG I LR A I T
Sbjct: 4 GWLLKKRRKKMQGFARRYFVLNFKYGTLSYYFNP---NSPVRGQIPLRLASISASPRRRT 60
Query: 76 FIISNGVQTFHIKASNEVERQRWVTALE 103
I +G + +H+KA N+ + Q W+ AL
Sbjct: 61 IHIDSGSEVWHLKALNDEDFQAWMKALR 88
>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 = 63.5 bits (155), Expect = 1e-12
Identities = 27/86 (31%), Positives = 50/86 (58%), Gaps = 2/86 (2%)
Query: 20 GWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGA--IIQTEDSCTFI 77
G+L K +K +++RWFVL NG L YY++ ++ +G I+L G+ I + E + TF
Sbjct: 3 GYLTKLGGKVKTWKRRWFVLKNGELFYYKSPNDVIRKPQGQIALDGSCEIARAEGAQTFE 62
Query: 78 ISNGVQTFHIKASNEVERQRWVTALE 103
I +T+++ A +E + W+ ++
Sbjct: 63 IVTEKRTYYLTADSENDLDEWIRVIQ 88
>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 = 59.2 bits (144), Expect = 6e-11
Identities = 30/103 (29%), Positives = 46/103 (44%), Gaps = 11/103 (10%)
Query: 12 SHSDAEMKGWLFKWTNY-LKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQT 70
++ GWL K LK ++KRWFVL + L YY++ E G+I L I
Sbjct: 3 PNAPVVFSGWLHKQGGSGLKNWKKRWFVLKDNCLYYYKDPEEEK--ALGSILLPSYTISP 60
Query: 71 EDSC-------TFIIS-NGVQTFHIKASNEVERQRWVTALELA 105
F G++T++ A + E ++W+ AL LA
Sbjct: 61 ASPSDEINRKFAFKAEHAGMRTYYFAADTQEEMEQWMKALSLA 103
>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 = 56.5 bits (137), Expect = 6e-10
Identities = 27/98 (27%), Positives = 47/98 (47%), Gaps = 8/98 (8%)
Query: 11 ASHSDAEMKGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQ- 69
+ +S + +G+L+K YQKRWFVL LL Y+ + G I L G ++
Sbjct: 3 SCNSPVDKEGYLWKKGERNTSYQKRWFVLKGNLLFYFEKKG--DREPLGVIVLEGCTVEL 60
Query: 70 --TEDSCTFII---SNGVQTFHIKASNEVERQRWVTAL 102
E+ F I G +++ + A ++ + + W+ AL
Sbjct: 61 SEDEEPYAFAIRFDGPGSRSYVLAAESQEDMESWMKAL 98
>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 = 53.4 bits (129), Expect = 5e-09
Identities = 27/89 (30%), Positives = 41/89 (46%), Gaps = 10/89 (11%)
Query: 29 LKGYQKRWFVLSNG--LLSYYRNQAEMSHTCRGTISLRGAIIQ---TEDSCTFIISNGVQ 83
LK ++ RWFV L YYR+ + T G+I L GA + TF I +
Sbjct: 15 LKTWKSRWFVFDERKCQLYYYRSPQD--ITPLGSIDLSGAAFSYDPEAEKGTFEIHTPGR 72
Query: 84 TFHIKASNEVERQRWVTALELAKSKARQH 112
+ +KAS+ W+ L +SK R++
Sbjct: 73 VYILKASDRQAMLYWLQEL---QSKRREY 98
>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 = 52.4 bits (126), Expect = 1e-08
Identities = 31/104 (29%), Positives = 50/104 (48%), Gaps = 17/104 (16%)
Query: 20 GWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMS----------HTCRGTISLRGAIIQ 69
G+L K K ++KRWFVL L+YY+N E HTC + L+
Sbjct: 10 GYLEKKGERRKTWKKRWFVLRPTKLAYYKNDKEYRLLRLIDLTDIHTC-TEVQLK----- 63
Query: 70 TEDSCTFIISNGVQTFHIKASNEVERQRWVTALELAKSKARQHA 113
+ TF I +TF+++A ++ E + W++A+ LA+ R
Sbjct: 64 -KHDNTFGIVTPARTFYVQADSKAEMESWISAINLARQALRATI 106
>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 = 51.8 bits (125), Expect = 1e-08
Identities = 24/101 (23%), Positives = 51/101 (50%), Gaps = 14/101 (13%)
Query: 18 MKGWLFKWTNYL-KGYQKRWFVLSNGLLSYYRNQAEMS---HTCRGTISLRGAIIQTEDS 73
+G+LFK ++ K +++RWF + NG L Y + + + LR ++ +
Sbjct: 1 KEGYLFKRSSNAFKTWKRRWFSIQNGQLVYQKRFKKDTPTVVVED----LRLCTVKPCED 56
Query: 74 -----CTFIISNGVQTFHIKASNEVERQRWVTALELAKSKA 109
C ++S +++ ++A +E +RQ W+ A++ A + A
Sbjct: 57 IDRRFCFEVVSPT-KSYMLQAESEEDRQAWIQAIQAAIASA 96
>gnl|CDD|241439 cd13285, PH_ORP1, Human Oxysterol binding protein related protein 1
Pleckstrin homology (PH) domain. Human ORP1 has 2
forms, a long (ORP1L) and a short (ORP1S). ORP1L
contains 3 N-terminal ankyrin repeats, followed by a PH
domain, a FFAT motif (two phenylalanines in an acidic
tract), and a C-terminal OSBP-related domain. ORP1S is
truncated and contains only an OSBP-related domain.
ORP1L is proposed to function in motility and
distribution of late endosomes, autophagy, and
macrophage lipid metabolism. ORP1S is proposed to
function in vesicle transport from Golgi. 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 = 125
Score = 51.6 bits (124), Expect = 4e-08
Identities = 37/115 (32%), Positives = 53/115 (46%), Gaps = 25/115 (21%)
Query: 20 GWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCR--GTISLRGAIIQT--EDSCT 75
G L+K + + G++ W VL G+LS+Y QA+ + + G L A EDSC
Sbjct: 12 GPLWKSSRFF-GWRSHWVVLERGVLSWYHKQADAASGLKRQGCKYLTHAKCTVKEEDSCF 70
Query: 76 FIISNGVQTFHI-----KASNEVERQRWVTALELAKSKARQHALVAAFSTSAYST 125
F I + H K + +V RQ+W+ ALE +H SAYST
Sbjct: 71 FTIRCFDDSVHHFKVPPKNNPQVTRQKWLNALE-------EH--------SAYST 110
>gnl|CDD|241441 cd13287, PH_ORP3_ORP6_ORP7, Human Oxysterol binding protein related
proteins 3, 6, and 7 Pleckstrin homology (PH) domain.
Human ORP3 is proposed to function in regulating the
cell-matrix and cell-cell adhesion. A proposed specific
function for Human ORP6 was not found at present. Human
ORP7is proposed to function in negatively regulating the
Golgi soluble NSF attachment protein receptor (SNARE) of
28kDa (GS28) protein stability via sequestration of
Golgi-associated ATPase enhancer of 16 kDa (GATE-16).
ORP3 has 2 isoforms: the longer ORP3(1) and the shorter
ORP3(2). ORP3(1), ORP6, and ORP7 all contain a
N-terminal PH domain, a FFAT motif (two phenylalanines
in an acidic tract), and a C-terminal OSBP-related
domain. The shorter ORP3(2) is missing the C-terminal
portion of its OSBP-related domain. 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 = 123
Score = 51.2 bits (123), Expect = 5e-08
Identities = 26/101 (25%), Positives = 49/101 (48%), Gaps = 8/101 (7%)
Query: 20 GWLFK---WTNYLKGYQKRWFVLSNGLLSYYRNQAEMSH-TCRGTISLRGAIIQT-EDSC 74
G+L K W LKG+ KR+FVL G+L Y ++ +++ G+I + +++ + +
Sbjct: 26 GYLLKKRKWP--LKGWHKRFFVLEKGILKYAKSPLDIAKGKLHGSIDVGLSVMSIKKKAR 83
Query: 75 TFIISNGVQTFHIKASNEVERQRWVTALELAKSKARQHALV 115
+ +H+KA ++ WV L A RQ+ +
Sbjct: 84 RIDLDTEEFIYHLKAKSQDLFDSWVAKLR-AHRLYRQNEIA 123
>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 = 50.3 bits (121), Expect = 1e-07
Identities = 29/91 (31%), Positives = 44/91 (48%), Gaps = 6/91 (6%)
Query: 18 MKGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAI-IQTEDSC-- 74
G+L K Y + WFVL +LS+YR+ ++ + GTI LR I + D
Sbjct: 31 KSGYLSKRGKRTPRYNRYWFVLKGDVLSWYRSSTDL-YFPHGTIDLRYGISAEITDKDKE 89
Query: 75 --TFIISNGVQTFHIKASNEVERQRWVTALE 103
F I+ +T+ KA +E + WV AL+
Sbjct: 90 TTHFKITTNSRTYTFKADSEPSAKEWVKALQ 120
>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 = 48.4 bits (116), Expect = 3e-07
Identities = 29/95 (30%), Positives = 46/95 (48%), Gaps = 7/95 (7%)
Query: 18 MKGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRG----AIIQTE-D 72
GWL K + K ++KRWFVL LSYY+++ E + R I+L A ++ +
Sbjct: 8 KSGWLLKRSRKTKTWKKRWFVLRPCQLSYYKDEKE--YKLRRVINLSELTAVAPLKDKKR 65
Query: 73 SCTFIISNGVQTFHIKASNEVERQRWVTALELAKS 107
F I + +H +AS+E + WV A+
Sbjct: 66 KNVFAIYTPSKNYHFQASSEKDANEWVEAIREESR 100
>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 = 48.1 bits (115), Expect = 4e-07
Identities = 26/99 (26%), Positives = 43/99 (43%), Gaps = 18/99 (18%)
Query: 20 GWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAII-------QTED 72
GWL K +K +Q+RWFVL L YY+++ E +G I L G + +
Sbjct: 7 GWLKKQGGIVKNWQRRWFVLRGDQLYYYKDEDESKP--QGCIPLPGNTVKELPFNPEEPG 64
Query: 73 SCTFIISNGV---------QTFHIKASNEVERQRWVTAL 102
F I G ++ + A+++ E + WV +
Sbjct: 65 KFLFEIIPGDGGTRRSANHDSYLLMANSQAEMEEWVKVI 103
>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 = 47.8 bits (114), Expect = 7e-07
Identities = 29/91 (31%), Positives = 45/91 (49%), Gaps = 9/91 (9%)
Query: 20 GWLFK---WTNYL--KGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGA---IIQTE 71
GWL+K ++ L K ++ RWFVL + +L YY N E GTI +R A + T
Sbjct: 11 GWLYKKGGGSSTLSRKNWKSRWFVLRDTVLKYYENDQE-GAKALGTIDIRSAKEIVDNTP 69
Query: 72 DSCTFIISNGVQTFHIKASNEVERQRWVTAL 102
F I+ +T+H A + + +W + L
Sbjct: 70 KENGFDITTPSRTYHFVAESPEDASQWFSVL 100
>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 = 47.3 bits (113), Expect = 1e-06
Identities = 27/111 (24%), Positives = 47/111 (42%), Gaps = 26/111 (23%)
Query: 17 EMKGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRG-AIIQTEDS-- 73
+ +GWL K +K +++RWF+L++ L Y+ RG I L ++ + EDS
Sbjct: 4 DREGWLLKLGGRVKSWKRRWFILTDNCLYYFEYTT--DKEPRGIIPLENLSVREVEDSKK 61
Query: 74 --C--TFIISNGV-----------------QTFHIKASNEVERQRWVTALE 103
C + SN V + I A+ E E W+ +++
Sbjct: 62 PFCFELYSPSNEVIKACKTDSDGKVVEGNHTVYRISAATEEEMDEWIKSIK 112
>gnl|CDD|241268 cd01235, PH_Sbf1_hMTMR5, Set binding factor 1 (also called Human
MTMR5) Pleckstrin Homology (PH) domain. Sbf1 is a
myotubularin-related pseudo-phosphatase. Both Sbf1 and
myotubularin interact with the SET domains of Hrx and
other epigenetic regulatory proteins, but Sbf1 lacks
phosphatase activity due to several amino acid changes
in its structurally preserved catalytic pocket. It
contains pleckstrin (PH), GEF, and myotubularin
homology domains that are thought to be responsible for
signaling and growth control. Sbf1 functions as an
inhibitor of cellular growth. The N-terminal GEF
homology domain serves to inhibit the transforming
effects of Sbf1. 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 = 46.9 bits (112), Expect = 1e-06
Identities = 18/53 (33%), Positives = 30/53 (56%), Gaps = 4/53 (7%)
Query: 14 SDAEMKGWLFKWTNYLKGYQKRWFVL--SNGLLSYYRNQAEMSHTCRGTISLR 64
+G+L+K LKG+++RWFVL + L YY ++ + C+G I L+
Sbjct: 1 ESRTCEGYLYKRGALLKGWKQRWFVLDLTKHQLRYYESKEDTK--CKGVIDLQ 51
>gnl|CDD|241255 cd01220, PH1_FARP1-like, FERM, RhoGEF and pleckstrin
domain-containing protein 1 and related proteins
Pleckstrin Homology (PH) domain, repeat 1. Members here
include FARP1 (also called Chondrocyte-derived
ezrin-like protein; PH domain-containing family C member
2), FARP2 (also called FIR/FERM domain including RhoGEF;
FGD1-related Cdc42-GEF/FRG), and FARP6 (also called Zinc
finger FYVE domain-containing protein 24). They are
members of the Dbl family guanine nucleotide exchange
factors (GEFs) which are upstream positive regulators of
Rho GTPases. Little is known about FARP1 and FARP6,
though FARP1 has increased expression in differentiated
chondrocytes. FARP2 is thought to regulate neurite
remodeling by mediating the signaling pathways from
membrane proteins to Rac. It is found in brain, lung,
and testis, as well as embryonic hippocampal and
cortical neurons. FARP1 and FARP2 are composed of a
N-terminal FERM domain, a proline-rich (PR) domain,
Dbl-homology (DH), and two C-terminal PH domains. FARP6
is composed of Dbl-homology (DH), and two C-terminal PH
domains separated by a FYVE domain. This hierarchy
contains 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 = 123
Score = 47.3 bits (113), Expect = 1e-06
Identities = 29/104 (27%), Positives = 48/104 (46%), Gaps = 17/104 (16%)
Query: 20 GWLFKWTNYLKGYQKRWFVLSNGLLSYY------RNQAEMSHTCRGTISLRGAIIQ-TED 72
G L K + KG Q+R F L + +L Y Q ++ G + LRG +++ +E
Sbjct: 26 GCLLKLS--KKGLQQRMFFLFSDVLIYTSRGPTSTLQFKV----HGQLPLRGLMVEESEP 79
Query: 73 SC----TFIISNGVQTFHIKASNEVERQRWVTALELAKSKARQH 112
F I G + + AS+E E++RW+ L A A++
Sbjct: 80 EMGVPHCFTIYGGNRALTVAASSEEEKERWLEDLSRAIDAAKKS 123
>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 = 45.7 bits (109), Expect = 3e-06
Identities = 27/93 (29%), Positives = 48/93 (51%), Gaps = 8/93 (8%)
Query: 19 KGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISL----RGAIIQTEDS- 73
KG+L+K + L +++RWFVL LSYY+++ +G I+L + +
Sbjct: 11 KGYLWKKGHLLPTWRERWFVLKPNSLSYYKSEDLKEK--KGEIALDSNCCVESLPDREGK 68
Query: 74 -CTFIISNGVQTFHIKASNEVERQRWVTALELA 105
C F + +T+ + AS+ RQ W+ A++ A
Sbjct: 69 KCRFCVKTPDKTYELSASDHKTRQEWIQAIQTA 101
>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 = 45.0 bits (107), Expect = 4e-06
Identities = 31/96 (32%), Positives = 47/96 (48%), Gaps = 12/96 (12%)
Query: 19 KGWLFKWT---NYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQ---TED 72
GWL K + NY +QKRW V L Y+ ++ EM +G I L +I D
Sbjct: 3 SGWLDKLSPQGNY--VFQKRWVVFDGDSLRYFNSEKEM--YSKGIIPL-SSIKTVRSVGD 57
Query: 73 SCTFIISNGVQTFHIKASNEVERQRWVTALELAKSK 108
+ +++ +TF +A +E ER WV+ L A S+
Sbjct: 58 NKFEVVTGN-RTFVFRAESEDERNLWVSTLMAAISE 92
>gnl|CDD|241425 cd13271, PH2_TAPP1_2, Tandem PH-domain-containing proteins 1 and 2
Pleckstrin homology (PH) domain, C-terminal repeat. The
binding of TAPP1 (also called PLEKHA1/pleckstrin
homology domain containing, family A (phosphoinositide
binding specific) member 1) and 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). TAPP1 and TAPP2 contain 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. 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 = 45.0 bits (107), Expect = 7e-06
Identities = 19/92 (20%), Positives = 44/92 (47%), Gaps = 10/92 (10%)
Query: 20 GWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAE--------MSHTCRGTISLRGAIIQTE 71
G+ K K +++R+F+L + +SYY+++ + + + L G ++ +
Sbjct: 12 GYCVKQGAVRKNWKRRYFILDDNTISYYKSETDKEPLRTIPLKEVLKVHECLSGDLLMRD 71
Query: 72 DSCTFIISNGVQTFHIKASNEVERQRWVTALE 103
+ F I +TF+I+A + + W+ A+
Sbjct: 72 N--LFEIITTSRTFYIQADSPEDMHSWIKAIS 101
>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 = 44.9 bits (107), Expect = 1e-05
Identities = 22/79 (27%), Positives = 35/79 (44%), Gaps = 8/79 (10%)
Query: 32 YQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAII----QTEDSCT----FIISNGVQ 83
Y++RWFVL+ LSYY +G+I L + + S F +
Sbjct: 20 YKERWFVLTKSSLSYYEGDGGKRGKEKGSIDLSKIKCVEEVKDDASFERKYPFQVVYDDY 79
Query: 84 TFHIKASNEVERQRWVTAL 102
T ++ A +E +R W+ AL
Sbjct: 80 TLYVFAPSEEDRDEWILAL 98
>gnl|CDD|241531 cd13380, PH_Skap1, Src kinase-associated phosphoprotein 1
Pleckstrin homology (PH) domain. Adaptor protein Skap1
(also called Skap55/Src kinase-associated
phosphoprotein of 55 kDa) and its partner, ADAP
(adhesion and degranulation promoting adapter protein)
help reorganize the cytoskeleton and/or promote
integrin-mediated adhesion upon immunoreceptor
activation. Skap1 is also involved in T Cell Receptor
(TCR)-induced RapL-Rap1 complex formation and LFA-1
activation. Skap1 has an N-terminal coiled-coil
conformation which is proposed to be involved in
homodimer formation, a central PH domain and a
C-terminal SH3 domain that associates with ADAP. The
Skap1 PH domain plays a role in controlling integrin
function via recruitment of ADAP-SKAP complexes to
integrins as well as in controlling the ability of ADAP
to interact with the CBM signalosome and regulate
NF-kappaB. SKAP1 is necessary for RapL binding to
membranes in a PH domain-dependent manner and the PI3K
pathway. Skap adaptor proteins couple receptors to
cytoskeletal rearrangements. Skap55/Skap1, Skap2, and
Skap-homology (Skap-hom) have an N-terminal coiled-coil
conformation, a central PH domain and a C-terminal SH3
domain. Their PH domains bind 3'-phosphoinositides as
well as directly affecting targets such as in Skap55
where it directly affecting integrin regulation by ADAP
and NF-kappaB activation or in Skap-hom where the
dimerization and PH domains comprise a
3'-phosphoinositide-gated molecular switch that
controls ruffle formation. 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 = 43.4 bits (102), Expect = 2e-05
Identities = 21/77 (27%), Positives = 35/77 (45%), Gaps = 11/77 (14%)
Query: 32 YQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQT---------EDSCTFIISNGV 82
+QKRW VL+ YY N E S +G ++ ++ Q DSC + +
Sbjct: 21 WQKRWCVLTTRAFYYYAN--EKSKQPKGGFLIKDSLAQMAPHLRKDSRRDSCFELTTPNQ 78
Query: 83 QTFHIKASNEVERQRWV 99
+T+ A++ E + WV
Sbjct: 79 RTYEFTAASPSEARDWV 95
>gnl|CDD|241270 cd01237, PH_fermitin, Fermitin family pleckstrin homology (PH)
domain. Fermitin functions as a mediator of integrin
inside-out signalling. The recruitment of Fermitin
proteins and Talin to the membrane mediates the terminal
event of integrin signalling, via interaction with
integrin beta subunits. Fermatin has FERM domain
interrupted with a pleckstrin homology (PH) domain.
Fermitin family homologs (Fermt1, 2, and 3, also known
as Kindlins) are each encoded by a different gene. In
mammalian studies, Fermt1 is generally expressed in
epithelial cells, Fermt2 is expressed inmuscle tissues,
and Fermt3 is expressed in hematopoietic lineages.
Specifically Fermt2 is expressed in smooth and striated
muscle tissues in mice and in the somites (a trunk
muscle precursor) and neural crest in Xenopus embryos.
As such it has been proposed that Fermt2 plays a role in
cardiomyocyte and neural crest differentiation.
Expression of mammalian Fermt3 is associated with
hematopoietic lineages: the anterior ventral blood
islands, vitelline veins, and early myeloid cells. In
Xenopus embryos this expression, also include the
notochord and cement gland. 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 = 41.2 bits (97), Expect = 1e-04
Identities = 29/109 (26%), Positives = 54/109 (49%), Gaps = 13/109 (11%)
Query: 17 EMKGWL--FKWTNY-LKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTEDS 73
E+ +L FK + LKG+++ WFV + LSYY+++ E + I+L+G + + +
Sbjct: 2 ELADYLKYFKPKKFTLKGFKRYWFVFKDTHLSYYKSKEESNGAPIQQINLKGCEVTPDVN 61
Query: 74 CT---FII------SNGVQTFHIKASNEVERQRWVTALELAKSKARQHA 113
+ F I G+ ++ +E + +W+ A LA SK + A
Sbjct: 62 VSQGKFGIKLLIPSPEGMNEVWLRCDSEEQYAKWMAACRLA-SKGKTMA 109
>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 = 40.8 bits (96), Expect = 2e-04
Identities = 25/95 (26%), Positives = 42/95 (44%), Gaps = 13/95 (13%)
Query: 20 GWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTEDSCT---- 75
G+L K + + ++ RWFVL L YY+ + + S +G I L+G I + C
Sbjct: 7 GFLVKKGHVVNNWKARWFVLLEDKLEYYKKKTDSSP--KGMILLKGCTITS--PCLEYEK 62
Query: 76 ----FIISNGVQTFH-IKASNEVERQRWVTALELA 105
F ++ H ++A + ER W + A
Sbjct: 63 RPLVFKLTTAKGQDHFLQACSREERDAWAKDITKA 97
>gnl|CDD|241478 cd13324, PH_Gab-like, Grb2-associated binding protein family
Pleckstrin homology (PH) domain. Gab proteins 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. There are
3 families: Gab1, Gab2, and Gab3. 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 = 40.5 bits (95), Expect = 2e-04
Identities = 26/103 (25%), Positives = 39/103 (37%), Gaps = 26/103 (25%)
Query: 14 SDAEMKGWLFKWTNYLKGYQKRWFVLSNG-------LLSYYRNQAEMSHTCRGTISLR-- 64
S E K W +KRWFVL +G +L YY++ G I L
Sbjct: 8 SPPEKKIKRAAW-------KKRWFVLRSGRLSGDPDVLEYYKDDH--CKKPIGAIDLDEC 58
Query: 65 -----GAIIQTED---SCTFIISNGVQTFHIKASNEVERQRWV 99
G + ++ F I +T+++ A E E +WV
Sbjct: 59 EQVDAGLTFEYKEFKNQFIFDIVTPKRTYYLVAETEEEMNKWV 101
>gnl|CDD|241420 cd13266, PH_Skap_family, Src kinase-associated phosphoprotein
family Pleckstrin homology (PH) domain. Skap adaptor
proteins couple receptors to cytoskeletal
rearrangements. Src kinase-associated phosphoprotein of
55 kDa (Skap55)/Src kinase-associated phosphoprotein 1
(Skap1), Skap2, and Skap-homology (Skap-hom) have an
N-terminal coiled-coil conformation, a central PH
domain and a C-terminal SH3 domain. Their PH domains
bind 3'-phosphoinositides as well as directly affecting
targets such as in Skap55 where it directly affecting
integrin regulation by ADAP and NF-kappaB activation or
in Skap-hom where the dimerization and PH domains
comprise a 3'-phosphoinositide-gated molecular switch
that controls ruffle formation. 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 = 106
Score = 40.5 bits (95), Expect = 2e-04
Identities = 20/77 (25%), Positives = 33/77 (42%), Gaps = 11/77 (14%)
Query: 32 YQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQ---------TEDSCTFIISNGV 82
+QKRW VLSN YY + E +G ++ G + +D C I +
Sbjct: 21 WQKRWCVLSNTAFYYYGS--EKDKQQKGEFAIDGYRARMNPTLRKDSKKDCCFEISAPDK 78
Query: 83 QTFHIKASNEVERQRWV 99
+ + A++ E + WV
Sbjct: 79 RVYQFTAASPKEAREWV 95
>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 = 40.7 bits (95), Expect = 2e-04
Identities = 20/46 (43%), Positives = 29/46 (63%), Gaps = 2/46 (4%)
Query: 20 GWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRG 65
GWL K + +K +Q+RWFVL L YY+++ E +G ISL+G
Sbjct: 7 GWLKKQRSIMKNWQQRWFVLRGDQLFYYKDEEETKP--QGCISLQG 50
>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 = 40.0 bits (94), Expect = 3e-04
Identities = 27/104 (25%), Positives = 44/104 (42%), Gaps = 19/104 (18%)
Query: 20 GWLFKWTNYLKGYQKRWFVL-SNGLLSYYRNQAEMSHTCRGTISLRGAII---------- 68
GWL + + LK ++K WFVL S+G LSYY + E G I++
Sbjct: 7 GWLLRQSTILKRWKKNWFVLYSDGELSYY--EDESRRDVEGRINMPIECRNIRVGLECRD 64
Query: 69 ------QTEDSCTFIISNGVQTFHIKASNEVERQRWVTALELAK 106
++ D I++ + + A + + W ALE A+
Sbjct: 65 VQPPEGRSRDCLLQIVTRDGKRLILCAESADDALAWKLALEDAR 108
>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 = 40.3 bits (94), Expect = 4e-04
Identities = 35/108 (32%), Positives = 46/108 (42%), Gaps = 20/108 (18%)
Query: 12 SHSDAEMKGWLFKW--TNYLKGY--QKRWFVLSNG-------LLSYYRNQAEMS------ 54
S D GWL K LK Y +KRWFVL G +L YYRN+
Sbjct: 2 SAGDVVCTGWLIKSPPEKKLKRYAWRKRWFVLRRGRMSGNPDVLEYYRNKHSKKPIRVID 61
Query: 55 -HTCRGTISLRGAIIQTE--DSCTFIISNGVQTFHIKASNEVERQRWV 99
+ C T I+ E ++ FI+ +TF++ A E E Q WV
Sbjct: 62 LNECEVTKHAGVNFIKKEFQNNFVFIVKTTTRTFYLVAKTEEEMQDWV 109
>gnl|CDD|241535 cd13384, PH_Gab2_2, Grb2-associated binding protein family
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.
Members here include insect, nematodes, and crustacean
Gab2s. 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 = 115
Score = 39.0 bits (91), Expect = 0.001
Identities = 28/107 (26%), Positives = 43/107 (40%), Gaps = 29/107 (27%)
Query: 20 GWLFK----WTNYLKGYQKRWFVLSNG------LLSYYRNQAEMSHTCR---GTISLR-- 64
GWL K + +++R+FVL L YY + TCR G+I L
Sbjct: 7 GWLTKSPPEKRIWRAKWRRRYFVLRQSEIPGQYFLEYYTD-----RTCRKLKGSIDLDQC 61
Query: 65 -----GAIIQTE----DSCTFIISNGVQTFHIKASNEVERQRWVTAL 102
G +T+ D F I +T+++ A E E +WV +
Sbjct: 62 EQVDAGLTFETKNKLKDQHIFDIRTPKRTYYLVADTEDEMNKWVNCI 108
>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 = 38.1 bits (89), Expect = 0.001
Identities = 19/47 (40%), Positives = 24/47 (51%), Gaps = 2/47 (4%)
Query: 19 KGWLFKWTNYLKGYQKRWFVLSNGLLSYYRN-QAEMSHTCRGTISLR 64
KGWL K ++K WFVL + L YYR+ AE + G I L
Sbjct: 2 KGWLMKQDED-GEWKKHWFVLRDASLRYYRDSVAEEAGELDGVIDLS 47
>gnl|CDD|241281 cd01250, PH_AGAP, Arf-GAP with GTPase, ANK repeat and PH
domain-containing protein Pleckstrin homology (PH)
domain. AGAP (also called centaurin gamma;
PIKE/Phosphatidylinositol-3-kinase enhancer) reside
mainly in the nucleus and are known to activate
phosphoinositide 3-kinase, a key regulator of cell
proliferation, motility and vesicular trafficking. There
are 3 isoforms of AGAP (PIKE-A, PIKE-L, and PIKE-S) the
longest of which PIKE-L consists of N-terminal proline
rich domains (PRDs), followed by a GTPase domain, a
split PH domain (PHN and PHC), an ArfGAP domain and two
ankyrin repeats. PIKE-S terminates after the PHN domain
and PIKE-A is missing the PRD region. Centaurin binds
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 = 114
Score = 38.5 bits (90), Expect = 0.001
Identities = 21/99 (21%), Positives = 40/99 (40%), Gaps = 15/99 (15%)
Query: 20 GWLFKW-TNYLK--GYQKRWFVLSNGLLSYYRNQAE-MSHTCRGTISLRGAII------- 68
G+L+K + L +K + +G L+Y+ + + M + I L +
Sbjct: 8 GYLYKRSSKSLNKEWKKKYVTLCDDGRLTYHPSLHDYMENVHGKEIDLLRTTVKVPGKRP 67
Query: 69 ----QTEDSCTFIISNGVQTFHIKASNEVERQRWVTALE 103
I+S + +H +A++ ER WV A+E
Sbjct: 68 PRASSKSAFEFIIVSLDGKQWHFEAASSEERDEWVQAIE 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 = 38.1 bits (89), Expect = 0.001
Identities = 21/95 (22%), Positives = 41/95 (43%), Gaps = 14/95 (14%)
Query: 20 GWLFKWTNYLKG---YQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGA-IIQTEDSCT 75
G+L K K + R+ ++ G + Y++N S +G SL G E++ +
Sbjct: 13 GYLTKKGGSQKQLLKWPLRYVIIHKGCVYYFKNS--QSAKPKGVFSLNGYNRRAAEETTS 70
Query: 76 FI--------ISNGVQTFHIKASNEVERQRWVTAL 102
+S +T++ A +E E + W+ +L
Sbjct: 71 KKKFVFKIIHLSKDHRTWYFSAKSEDEMKEWMESL 105
>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 = 38.1 bits (89), Expect = 0.002
Identities = 28/99 (28%), Positives = 44/99 (44%), Gaps = 13/99 (13%)
Query: 20 GWLFKWTNYLKGY-----QKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTEDSC 74
GWL+K KG+ ++ WFVL L +Y N G I+L I+ C
Sbjct: 17 GWLWKKKEA-KGFFGQKWKRYWFVLKGSSLYWYNNP--QDEKAEGFINLPDFKIERASEC 73
Query: 75 ----TFIISN-GVQTFHIKASNEVERQRWVTALELAKSK 108
F S+ ++TF+ A N + +W++ L A +K
Sbjct: 74 KKKYAFKASHPKIKTFYFAAENLDDMNKWLSKLITAINK 112
>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 = 37.2 bits (87), Expect = 0.003
Identities = 26/105 (24%), Positives = 47/105 (44%), Gaps = 17/105 (16%)
Query: 18 MKGWLFKWTNYLK--GYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISL----------RG 65
+G+L K T + G++KRWF L + L Y+++ + +G I + G
Sbjct: 4 KEGYLEK-TGPKQTDGFRKRWFTLDDRRLMYFKDP--LDAFPKGEIFIGSKEEGYSVREG 60
Query: 66 AI--IQTEDSCTFIISNGVQTFHIKASNEVERQRWVTALELAKSK 108
I+ F + +TF + A E ER+ W+TA++ +
Sbjct: 61 LPAGIKGHWGFGFTLVTPDRTFVLSAETEEERREWITAIQKVLER 105
>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 = 36.8 bits (86), Expect = 0.004
Identities = 21/86 (24%), Positives = 35/86 (40%), Gaps = 16/86 (18%)
Query: 30 KGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTEDSCTFIISNGVQTFHI-- 87
+ +++RWF L LL Y+++ E G I L +Q E+ G F +
Sbjct: 13 EVFKERWFKLRGNLLFYFKSN-EPGSEPAGVIVLENCRVQREEP-----DPGGFAFSLVF 66
Query: 88 --------KASNEVERQRWVTALELA 105
+E ER W+ A++ A
Sbjct: 67 KDEKKYRFSCRSEEERDEWIEAIKQA 92
>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 = 36.1 bits (84), Expect = 0.005
Identities = 23/85 (27%), Positives = 37/85 (43%), Gaps = 7/85 (8%)
Query: 20 GWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTEDSCT---- 75
G+L K +K ++ RWFVL L Y++ + + + R T+ L D
Sbjct: 7 GYLTKQGGIVKNWKTRWFVLRKNELKYFKTRTD-TKPIR-TLDLTECSSVQADYSQGKPN 64
Query: 76 -FIISNGVQTFHIKASNEVERQRWV 99
F + +TF++ A E E WV
Sbjct: 65 CFRLVFPDRTFYMYAKTEEEADEWV 89
>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 = 36.2 bits (84), Expect = 0.009
Identities = 26/109 (23%), Positives = 47/109 (43%), Gaps = 13/109 (11%)
Query: 14 SDAEMKGWLFKWTNYLKG--YQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRG--AIIQ 69
+ KGWL K +KRWFVL+ L YY++ + G++ L +++
Sbjct: 11 QEVIEKGWLLKEGGKGGNLTKKKRWFVLTPNSLDYYKSSERNALKL-GSLVLNSLCSVVP 69
Query: 70 TEDSC-------TFIISNGVQTFHIKASNEVERQRWVTAL-ELAKSKAR 110
++ TF + ++++ + E RWV A+ E+ SK
Sbjct: 70 PDEKVYKETGYWTFTVHGRKHSYYLYTKLQEEANRWVNAIQEVIDSKPP 118
>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 = 35.7 bits (82), Expect = 0.012
Identities = 18/46 (39%), Positives = 25/46 (54%), Gaps = 2/46 (4%)
Query: 20 GWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRG 65
GWL K ++K + RWFVL L Y++++ E GTI L G
Sbjct: 7 GWLRKQGGFVKTWHTRWFVLKGDQLYYFKDEDETKPL--GTIFLPG 50
>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 = 35.4 bits (82), Expect = 0.016
Identities = 25/113 (22%), Positives = 45/113 (39%), Gaps = 38/113 (33%)
Query: 20 GWLFKWTNYL---------KGYQKRWFVLSNG-----LLSYYRNQAEMSHTCRGTISLRG 65
G+L+K K +++R+F L +L +Y++ E S +GTI L
Sbjct: 10 GYLYK-GPENSSMFISLAMKSFKRRFFHLKQLVDGSYILEFYKD--EKSKEAKGTIYL-- 64
Query: 66 AIIQTEDSCTFIISN-------------GVQTFHIKASNEVERQRWVTALELA 105
DSCT ++ N +++ + A +E E W++ L
Sbjct: 65 ------DSCTGVVQNSKRRKFCFELRMQDGKSYVLAAESESEMDDWISKLNKI 111
>gnl|CDD|241405 cd13251, PH_ASAP, ArfGAP with SH3 domain, ankyrin repeat and PH
domain Pleckstrin homology (PH) domain. ASAPs (ASAP1,
ASAP2, and ASAP3) function as an Arf-specific GAPs,
participates in rhodopsin trafficking, is associated
with tumor cell metastasis, modulates phagocytosis,
promotes cell proliferation, facilitates vesicle
budding, Golgi exocytosis, and regulates vesicle coat
assembly via a Bin/Amphiphysin/Rvs domain. ASAPs contain
an NH2-terminal BAR domain, a tandem PH domain/GAP
domain, three ankyrin repeats, two proline-rich regions,
and a COOH-terminal Src homology 3 (SH3) 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 = 108
Score = 34.6 bits (80), Expect = 0.024
Identities = 28/111 (25%), Positives = 48/111 (43%), Gaps = 17/111 (15%)
Query: 12 SHSDAEMKGWLFKWTNYL--KGYQKRWFVLSNGLLSYYRNQAEMSH------TCRGTISL 63
E G+L K + K +QKR + NG L+ + TC+ +
Sbjct: 6 KEHGTEKSGYLLKKSEGKLRKVWQKRRCSIRNGFLTISHSDENKPPVKLNLLTCQ--VKP 63
Query: 64 RGAIIQTEDSCTF-IISNGVQTFHIKASNEVERQRWVTALELAKSKARQHA 113
ED F +IS+ +T+H +A +E E + W++ L+ +K +A A
Sbjct: 64 NP-----EDKKCFDLISHN-RTYHFQAEDEQEAEAWISVLQNSKEEALNKA 108
>gnl|CDD|241391 cd13237, PH2_FGD5_FGD6, FYVE, RhoGEF and PH domain
containing/faciogenital dysplasia proteins 5 and 6
pleckstrin homology (PH) domain, C-terminus. 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 = 90
Score = 33.5 bits (77), Expect = 0.046
Identities = 21/92 (22%), Positives = 38/92 (41%), Gaps = 10/92 (10%)
Query: 18 MKGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTEDSCTFI 77
M G+L++ K +++ WFVL + +L Y+ ++ +I L G +
Sbjct: 1 MSGYLYRRKRKKKSWKRLWFVLKDKVLYTYKASEDVVAL--ESIPLLGYTVVPAKEGFEG 58
Query: 78 ISNGV-QTFH-------IKASNEVERQRWVTA 101
+ V Q H +A + QRW+ A
Sbjct: 59 DESLVFQLLHKGQLPYIFRADDAETAQRWIEA 90
>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 = 34.3 bits (79), Expect = 0.053
Identities = 27/108 (25%), Positives = 44/108 (40%), Gaps = 22/108 (20%)
Query: 14 SDAEMKGWLFKWTN--YLKGYQKRWFVLSNGLLSYY---------RNQAEMSHTCRGTIS 62
+ ++ G L+K + KR+FVL L YY + + H +G I
Sbjct: 10 TKVQLSGVLWKRPFGRQSAKWSKRFFVLKECFLLYYAESEKKDFEKTRRFNIHP-KGVIP 68
Query: 63 LRGAIIQ-TEDS---CTFIISNGVQTFH----IKASNEVERQRWVTAL 102
L G I+ D F+IS+ F + A +E E++ W+ L
Sbjct: 69 LGGCSIEAGRDPGRPYCFLISH--PDFKGSIILAADSEEEQESWLDML 114
>gnl|CDD|241521 cd13370, PH_GAP1m_mammal-like, GTPase activating protein 1 m
pleckstrin homology (PH) domain. GAP1(m) (also called
RASA2/RAS p21 protein activator (GTPase activating
protein) 2) is a member of the GAP1 family of
GTPase-activating proteins, along with RASAL1,
GAP1(IP4BP), and CAPRI. With the notable exception of
GAP1(m), they all possess an arginine finger-dependent
GAP activity on the Ras-related protein Rap1. GAP1(m)
contains two C2 domains, a PH domain, a RasGAP domain,
and a BTK domain. Its C2 domains, like those of
GAP1IP4BP, do not contain the C2 motif that is known to
be required for calcium-dependent phospholipid binding.
GAP1(m) is regulated by the binding of its PH domains to
phophoinositides, PIP3 (phosphatidylinositol
3,4,5-trisphosphate). It suppresses RAS, enhancing the
weak intrinsic GTPase activity of RAS proteins resulting
in the inactive GDP-bound form of RAS, allowing control
of cellular proliferation and differentiation. GAP1(m)
binds inositol tetrakisphosphate (IP4). 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 = 133
Score = 34.1 bits (78), Expect = 0.061
Identities = 21/80 (26%), Positives = 38/80 (47%), Gaps = 10/80 (12%)
Query: 30 KGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAI-IQTEDSCTFIISNGVQTFH-- 86
K ++KRWF L++ L+Y++ Q TI ++ + ++ + F N Q H
Sbjct: 35 KNFKKRWFCLTSRELTYHK-QKGKEAIF--TIPVKNILAVEKLEESAFNKKNMFQVIHSE 91
Query: 87 ----IKASNEVERQRWVTAL 102
++A+N VE W+ L
Sbjct: 92 KPLYVQANNCVEANEWIEVL 111
>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 = 33.4 bits (77), Expect = 0.077
Identities = 23/91 (25%), Positives = 34/91 (37%), Gaps = 8/91 (8%)
Query: 30 KGYQKRWFVLSNGLLSYYRNQAEMSHTCR--GTISLRG----AIIQTEDSCTFIISNGVQ 83
K Q R+ L N +L Y + + L G E S F I + +
Sbjct: 26 KEMQPRYLFLFNDVLLYTTPVQSGVGKYKLKNELPLSGMKVSLPEDEEYSNEFQIESTKR 85
Query: 84 TFHIKASNEVERQRWVTALELAK--SKARQH 112
+F + AS+ ER WV AL A ++
Sbjct: 86 SFTLSASSAEERDEWVKALSRAIEDYTKKRR 116
>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 = 33.5 bits (77), Expect = 0.080
Identities = 26/116 (22%), Positives = 45/116 (38%), Gaps = 31/116 (26%)
Query: 18 MKGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGA-IIQ---TEDS 73
+ WL K LK + K W VL G+L Y++ GT+ L +I+ +D
Sbjct: 10 LSDWL-KIRGTLKSWTKLWCVLKPGVLLLYKSPKH--GQWVGTVLLNACEVIERPSKKDG 66
Query: 74 CTFIISNGV-QTFH-----------------------IKASNEVERQRWVTALELA 105
F + + + Q+ +A+ E + + W+ ALEL+
Sbjct: 67 FCFKLYHPLDQSIWATRGPKGESVGAITQPLPSSHLIFRAATESDGRCWMDALELS 122
>gnl|CDD|241410 cd13256, PH3_ARAP, ArfGAP with RhoGAP domain, ankyrin repeat and
PH domain Pleckstrin homology (PH) domain, repeat 3.
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 third 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 = 110
Score = 33.1 bits (76), Expect = 0.083
Identities = 13/30 (43%), Positives = 18/30 (60%), Gaps = 2/30 (6%)
Query: 32 YQKRWFVLSNGLLSYYRNQAEMSHTCRGTI 61
+ +RW VL +G LSYY + + S T G I
Sbjct: 27 FSRRWCVLEDGFLSYYES--DKSTTPNGEI 54
>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 = 32.9 bits (76), Expect = 0.085
Identities = 22/92 (23%), Positives = 41/92 (44%), Gaps = 10/92 (10%)
Query: 19 KGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQ-TED----- 72
KG+L + G+ +RW VL L Y ++ + RG I+L A ++ + D
Sbjct: 17 KGYLLFLEDATDGWVRRWVVLRRPYLHIYSSEKDGDE--RGVINLSTARVEYSPDQEALL 74
Query: 73 --SCTFIISNGVQTFHIKASNEVERQRWVTAL 102
F + ++ ++A +E E W+ A+
Sbjct: 75 GRPNVFAVYTPTNSYLLQARSEKEMHDWLYAI 106
>gnl|CDD|241277 cd01244, PH_GAP1-like, RAS p21 protein activator (GTPase activating
protein) family pleckstrin homology (PH) domain.
RASAL1, GAP1(m), GAP1(IP4BP), and CAPRI are all members
of the GAP1 family of GTPase-activating proteins. They
contain N-terminal SH2-SH3-SH2 domains, followed by two
C2 domains, a PH domain, a RasGAP domain, and a BTK
domain. With the notable exception of GAP1(m), they all
possess an arginine finger-dependent GAP activity on the
Ras-related protein Rap1. They act as a suppressor of
RAS enhancing the weak intrinsic GTPase activity of RAS
proteins resulting in the inactive GDP-bound form of
RAS, allowing control of cellular proliferation and
differentiation. PH domains 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 = 107
Score = 32.6 bits (75), Expect = 0.10
Identities = 23/82 (28%), Positives = 42/82 (51%), Gaps = 12/82 (14%)
Query: 29 LKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRG--AIIQTEDSCTFIISNGVQ--- 83
K ++KR+F L+N LSY +++ +I L+ A+ + ++ F + N Q
Sbjct: 18 RKNFKKRYFRLTNEALSYSKSKGSQP---LCSIPLQDILAVERVDEKS-FKMKNMFQVVQ 73
Query: 84 ---TFHIKASNEVERQRWVTAL 102
T +++A N VE W++AL
Sbjct: 74 PDRTLYLQAKNVVELNEWLSAL 95
>gnl|CDD|197394 cd10159, CsoR-like_DUF156_2, Uncharacterized family 2; belongs to a
superfamily containing transcriptional regulators CsoR
(copper-sensitive operon repressor), RcnR, and FrmR, and
related domains; this family was previously known as
part of DUF156. Uncharacterized family 2, belonging to
a larger superfamily that contains various
transcriptional regulators that respond to different
stressors such as Cu(I), Ni(I), sulfite, and
formaldehyde, and includes CsoRs (copper-sensitive
operon repressors). CsoRs form homotetramers (dimer of
dimers). In Mycobacterium tuberculosis CsoR, within each
dimer, two Cys residues on opposite subunits, along with
a His residue, bind the Cu(I) ion (forming a triagonal
S2N coordination complex, C-H-C). These residues are
conserved in the majority of members of this
superfamily, including this family, and a conserved Tyr
and a Glu residue that facilitate allosteric regulation
of DNA binding for CsoRs are also conserved.
Length = 82
Score = 31.4 bits (72), Expect = 0.19
Identities = 18/57 (31%), Positives = 27/57 (47%), Gaps = 8/57 (14%)
Query: 451 KSTNKQDLKTIRGDQITWI-----DGRETYCSNIGRLISEVDAIIMRANRMVNNGRM 502
K + LKT RG QI I + R YC +I I A++ +AN+ + + M
Sbjct: 2 KKKALRLLKTARG-QIDGIIKMIEEDR--YCIDISNQILATQALLKKANKEILSAHM 55
>gnl|CDD|241522 cd13371, PH_GAP1_mammal-like, GAP1(IP4BP) pleckstrin homology (PH)
domain. GAP1 (also called IP4BP, RASA3/Ras
GTPase-activating protein 3, and RAS p21 protein
activator (GTPase activating protein)
3/GAPIII/MGC46517/MGC47588)) is a member of the GAP1
family of GTPase-activating proteins, along with RASAL1,
GAP1(m), and CAPRI. With the notable exception of
GAP1(m), they all possess an arginine finger-dependent
GAP activity on the Ras-related protein Rap1.
GAP1(IP4BP) contains two C2 domains, a PH domain, a
RasGAP domain, and a BTK domain. Its C2 domains, like
those of GAP1M, do not contain the C2 motif that is
known to be required for calcium-dependent phospholipid
binding. GAP1(IP4BP) is regulated by the binding of its
PH domains to phophoinositides, PIP3
(phosphatidylinositol 3,4,5-trisphosphate) and PIP2
(phosphatidylinositol 4,5-bisphosphate). It suppresses
RAS, enhancing the weak intrinsic GTPase activity of RAS
proteins resulting in the inactive GDP-bound form of
RAS, allowing control of cellular proliferation and
differentiation. GAP1(IP4BP) binds tyrosine-protein
kinase, HCK. Members here include humans, chickens,
frogs, and fish. 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 = 32.3 bits (73), Expect = 0.19
Identities = 22/80 (27%), Positives = 42/80 (52%), Gaps = 8/80 (10%)
Query: 29 LKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTEDSCTFIISNGVQ----- 83
+K ++KRWF L+N +Y++++ + C I A+ + E+ +F + N Q
Sbjct: 34 MKNFKKRWFRLTNHEFTYHKSKGDHP-LCSIPIENILAVERLEEE-SFKMKNMFQVIQPE 91
Query: 84 -TFHIKASNEVERQRWVTAL 102
+I+A+N VE + W+ L
Sbjct: 92 RALYIQANNCVEAKDWIDIL 111
>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 = 32.2 bits (74), Expect = 0.27
Identities = 17/80 (21%), Positives = 32/80 (40%), Gaps = 8/80 (10%)
Query: 32 YQKRWFVLSNGLLSYYRNQAEMSHTC------RGTISLRGAIIQTEDSCTFIISNGVQTF 85
+ KRWF++ + L+Y + +S +T I+N +T
Sbjct: 57 WSKRWFIVKDSFLAYVDDPDSGKILDVFLFDKEFKVSRGK--KETGSRHGLKITNLSRTL 114
Query: 86 HIKASNEVERQRWVTALELA 105
IK + + + WV ++E A
Sbjct: 115 KIKCKSYRKAKEWVESIEEA 134
>gnl|CDD|241532 cd13381, PH_Skap-hom_Skap2, Src kinase-associated phosphoprotein
homolog and Skap 2 Pleckstrin homology (PH) domain.
Adaptor protein Skap-hom, a homolog of Skap55, which
interacts with actin and with ADAP (adhesion and
degranulation promoting adapter protein) undergoes
tyrosine phosphorylation in response to plating of bone
marrow-derived macrophages on fibronectin. Skap-hom has
an N-terminal coiled-coil conformation that is involved
in homodimer formation, a central PH domain and a
C-terminal SH3 domain that associates with ADAP. The
Skap-hom PH domain regulates intracellular targeting;
its interaction with the DM domain inhibits Skap-hom
actin-based ruffles in macrophages and its binding to
3'-phosphoinositides reverses this autoinhibition. The
Skap-hom PH domain binds PI[3,4]P2 and PI[3,4,5]P3, but
not to PI[3]P, PI[5]P, or PI[4,5]P2. Skap2 is a
downstream target of Heat shock transcription factor 4
(HSF4) and functions in the regulation of actin
reorganization during lens differentiation. It is
thought that SKAP2 anchors the complex of tyrosine
kinase adaptor protein 2 (NCK20/focal adhesion to
fibroblast growth factor receptors at the lamellipodium
in lens epithelial cells. Skap2 has an N-terminal
coiled-coil conformation which interacts with the SH2
domain of NCK2, a central PH domain and a C-terminal SH3
domain that associates with ADAP (adhesion and
degranulation promoting adapter protein)/FYB (the Fyn
binding protein). Skap2 PH domain binds to membrane
lipids. Skap adaptor proteins couple receptors to
cytoskeletal rearrangements. Src kinase-associated
phosphoprotein of 55 kDa (Skap55)/Src kinase-associated
phosphoprotein 1 (Skap1), Skap2, and Skap-hom have an
N-terminal coiled-coil conformation, a central PH domain
and a C-terminal SH3 domain. Their PH domains bind
3'-phosphoinositides as well as directly affecting
targets such as in Skap55 where it directly affecting
integrin regulation by ADAP and NF-kappaB activation or
in Skap-hom where the dimerization and PH domains
comprise a 3'-phosphoinositide-gated molecular switch
that controls ruffle formation. 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 = 31.4 bits (71), Expect = 0.32
Identities = 17/83 (20%), Positives = 36/83 (43%), Gaps = 11/83 (13%)
Query: 32 YQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTEDS--------CTF-IISNGV 82
+QKRW LS + YY + + +G ++ G ++ ++ C F I +
Sbjct: 21 WQKRWCALSKTVFYYYGSDKDKQQ--KGEFAIDGYTVRMNNTLRKDAKKDCCFEISAPDK 78
Query: 83 QTFHIKASNEVERQRWVTALELA 105
+ + A++ E + WV ++
Sbjct: 79 RIYQFTAASPKEAEEWVQQIKFI 101
>gnl|CDD|241461 cd13307, PH2_AFAP, Actin filament associated protein family
Pleckstrin homology (PH) domain, repeat 2. There are 3
members of the AFAP family of adaptor proteins: AFAP1,
AFAP1L1, and AFAP1L2/XB130. AFAP1 is a cSrc binding
partner and actin cross-linking protein. AFAP1L1 is
thought to play a similar role to AFAP1 in terms of
being an actin cross-linking protein, but it
preferentially binds to cortactin and not cSrc, thereby
playing a role in invadosome formation. AFAP1L2 is a
cSrc binding protein, but does not bind to actin
filaments. AFAP1L2 acts as an intermediary between the
RET/PTC kinase and PI-3kinase pathway in the thyroid.
The AFAPs share a similar structure of a SH3 binding
motif, 3 SH2 binding motifs, 2 PH domains, a coiled-coil
region corresponding to the AFAP1 leucine zipper, and an
actin binding domain. This cd is the second PH domain of
AFAP. 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 = 31.2 bits (71), Expect = 0.37
Identities = 17/76 (22%), Positives = 38/76 (50%), Gaps = 6/76 (7%)
Query: 32 YQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTEDSC----TF-IISNGVQTFH 86
++ RW + +G L +Y+++ + + + + LRG + +F I+ NG +
Sbjct: 16 WRSRWCCVKDGQLHFYQDRNK-LKSPQQPLPLRGCEVIPGPDPKHPYSFRILRNGEEVAV 74
Query: 87 IKASNEVERQRWVTAL 102
++AS+ + RW+ L
Sbjct: 75 LEASSSEDMGRWLGLL 90
>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 = 30.7 bits (70), Expect = 0.53
Identities = 23/89 (25%), Positives = 36/89 (40%), Gaps = 21/89 (23%)
Query: 31 GYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAII--QT---EDSC----TFII--- 78
G++ R+ VL +L Y +I LR A I Q +D F+I
Sbjct: 22 GWKLRYGVLDGNILELY-ESRGGQLL--ESIKLRNAQIERQPNLPDDKYGTRHGFLINEH 78
Query: 79 -----SNGVQTFHIKASNEVERQRWVTAL 102
S+ + + + A + ER WV+AL
Sbjct: 79 KKSGLSSTTKYY-LCAETDKERDEWVSAL 106
>gnl|CDD|241415 cd13261, PH_RasGRF1_2, Ras-specific guanine nucleotide-releasing
factors 1 and 2 Pleckstrin homology (PH) domain.
RasGRF1 (also called GRF1; CDC25Mm/Ras-specific
nucleotide exchange factor CDC25; GNRP/Guanine
nucleotide-releasing protein) and RasGRF2 (also called
GRF2; Ras guanine nucleotide exchange factor 2) are a
family of guanine nucleotide exchange factors (GEFs).
They both promote the exchange of Ras-bound GDP by GTP,
thereby regulating the RAS signaling pathway. RasGRF1
and RasGRF2 form homooligomers and heterooligomers. GRF1
has 3 isoforms and GRF2 has 2 isoforms. The longest
isoforms of RasGRF1 and RasGRF2 contain the following
domains: a Rho-GEF domain sandwiched between 2 PH
domains, IQ domains, a REM (Ras exchanger motif) domain,
and a Ras-GEF domainwhich gives them the capacity to
activate both Ras and Rac GTPases in response to signals
from a variety of neurotransmitter receptors. Their IQ
domains allow them to act as calcium sensors to mediate
the actions of NMDA-type and calcium-permeable AMPA-type
glutamate receptors. GRF1 also mediates the action of
dopamine receptors that signal through cAMP. GRF1 and
GRF2 play strikingly different roles in regulating MAP
kinase family members, neuronal synaptic plasticity,
specific forms of learning and memory, and behavioral
responses to psychoactive drugs. 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 = 136
Score = 31.2 bits (71), Expect = 0.56
Identities = 24/112 (21%), Positives = 41/112 (36%), Gaps = 23/112 (20%)
Query: 13 HSDAEMKGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCR--GTISLRGAI--- 67
D +G+L K ++ + +WF L LL Y+ N++ + R G L G
Sbjct: 2 RKDGTRRGYLSKKSSDNSKWHTKWFALYQNLLFYFENES----SSRPSGLYLLEGCYCER 57
Query: 68 -----------IQTEDSCTFIIS---NGVQTFHIKASNEVERQRWVTALELA 105
E F IS + + ++ E + WV A++ A
Sbjct: 58 APSPKRAGKGKDHLEKQHYFTISFRHENQRQYELRTETETDCDTWVEAIKQA 109
>gnl|CDD|241288 cd01257, PH_IRS, Insulin receptor substrate (IRS) pleckstrin
homology (PH) domain. Insulin receptor substrate (IRS)
molecules are mediators in insulin signaling and play a
role in maintaining basic cellular functions such as
growth and metabolism. They act as docking proteins
between the insulin receptor and a complex network of
intracellular signaling molecules containing Src
homology 2 (SH2) domains. Four members (IRS-1, IRS-2,
IRS-3, IRS-4) of this family have been identified that
differ as to tissue distribution, subcellular
localization, developmental expression, binding to the
insulin receptor, and interaction with SH2
domain-containing proteins. IRS molecules have an
N-terminal PH domain, followed by an IRS-like PTB domain
which has a PH-like fold. 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.cytoskeletal
associated molecules, and in lipid associated enzymes.
Length = 106
Score = 30.3 bits (69), Expect = 0.65
Identities = 31/120 (25%), Positives = 45/120 (37%), Gaps = 37/120 (30%)
Query: 14 SDAEMKGWLFKWTNYLKGYQKRWFVL---SNGL---LSYYRNQAEMSHTC--RGTISLRG 65
+D G+L K LK +KR+FVL S+G L YY N+ + + I L
Sbjct: 1 TDVRKSGYLKK----LKTMRKRYFVLRAESHGGPARLEYYENEKKFRRNAEPKRVIPLSS 56
Query: 66 A---------------IIQTEDSCTFIISNGVQTFHIKASNEVERQRWVTALELAKSKAR 110
+ T+D C F + A +E E+ W AL + AR
Sbjct: 57 CFNINKRADAKHKHLIALYTKDEC----------FGLVAESEEEQDEWYQALLELQRPAR 106
>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 = 30.0 bits (68), Expect = 0.86
Identities = 22/96 (22%), Positives = 39/96 (40%), Gaps = 10/96 (10%)
Query: 19 KGWLFKWTNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTEDS----- 73
GW+ K ++ R+FVL L Y +++ + +G I L G + +DS
Sbjct: 2 SGWMKKRGERYGTWKTRYFVLKGTRLYYLKSENDSKE--KGLIDLTGHRVTVDDSNSKPG 59
Query: 74 --CTFIISNGVQTFHIKAS-NEVERQRWVTALELAK 106
++ V+ H A + + W+ AL A
Sbjct: 60 RYGFKLVPPAVEKVHYFAVDEKEVLREWMKALMKAT 95
>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 = 29.5 bits (67), Expect = 1.0
Identities = 15/73 (20%), Positives = 31/73 (42%), Gaps = 7/73 (9%)
Query: 32 YQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAI-IQTEDSCTFII----SNGVQTFH 86
+ KR+ VL L +Y+N E S + +I L+ + D + + ++ +
Sbjct: 19 WSKRYLVLREQSLDFYKN--ESSSSASLSIPLKDISNVSRTDLKPYCFEIVRKSSTKSIY 76
Query: 87 IKASNEVERQRWV 99
I ++ E W+
Sbjct: 77 ISVKSDDELYDWM 89
>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 = 29.9 bits (68), Expect = 1.1
Identities = 23/94 (24%), Positives = 40/94 (42%), Gaps = 12/94 (12%)
Query: 18 MKGWLFKW-TNYLKGYQKRWFVLSNGLLSYYRNQAEMSHTCRGTISLRGAIIQTE----- 71
+G+L + ++K W VL N LS+Y++Q+E ++ I + I E
Sbjct: 8 EQGYLQVLKKKGVNQWKKYWLVLRNRSLSFYKDQSE--YSPVKIIPIDDIIDVVELDPLS 65
Query: 72 ---DSCTFIISNGVQTFHIKASNEVERQRWVTAL 102
C II+ + A +E +W+ AL
Sbjct: 66 KSKKWCLQIITPE-KRIRFCADDEESLIKWLGAL 98
>gnl|CDD|241253 cd01218, PH_Phafin2-like, Phafin2 (also called EAPF, FLJ13187,
ZFYVE18 or PLEKHF2) Pleckstrin Homology (PH) domain.
Phafin2 is differentially expressed in the liver cancer
cell and regulates the structure and function of the
endosomes through Rab5-dependent processes. Phafin2
modulates the cell's response to extracellular
stimulation by modulating the receptor density on the
cell surface. Phafin2 contains a PH domain and a FYVE
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 = 123
Score = 30.3 bits (69), Expect = 1.1
Identities = 19/90 (21%), Positives = 32/90 (35%), Gaps = 22/90 (24%)
Query: 30 KGYQKRWFVLSNGLLSY---------YRNQAEMSHTCRGTISLRGAIIQT-EDSCT---- 75
K + R F L N +L Y Y Q I L I+ ED+
Sbjct: 42 KKPKPRQFFLFNDILVYGSIVINKKKYNKQR--------IIPLEDVKIEDLEDTGELKNG 93
Query: 76 FIISNGVQTFHIKASNEVERQRWVTALELA 105
+ I + ++F + A+ E+ W+ +
Sbjct: 94 WQIISPKKSFVVYAATATEKSEWMDHINKC 123
>gnl|CDD|241276 cd01243, PH_MRCK, MRCK (myotonic dystrophy-related Cdc42-binding
kinase) pleckstrin homology (PH) domain. MRCK is
thought to be coincidence detector of signaling by Cdc42
and phosphoinositides. It has been shown to promote
cytoskeletal reorganization, which affects many
biological processes. There are 2 members of this
family: MRCKalpha and MRCKbeta. MRCK consists of a
serine/threonine kinase domain, a cysteine rich (C1)
region, a PH domain and a p21 binding motif. The MRCK PH
domain is responsible for its targeting to cell to cell
junctions. 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 = 136
Score = 30.0 bits (68), Expect = 1.4
Identities = 10/37 (27%), Positives = 20/37 (54%), Gaps = 3/37 (8%)
Query: 73 SCTFIISNGVQTFH--IKASNEVERQRWVTAL-ELAK 106
+ + + + + + A +E E+Q+WV AL EL +
Sbjct: 95 TASQLHAPLLLKSSQLLLADSEAEKQKWVGALKELHR 131
>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 = 29.2 bits (66), Expect = 2.0
Identities = 22/94 (23%), Positives = 34/94 (36%), Gaps = 21/94 (22%)
Query: 33 QKRWFVLSNGLLSYYRNQAEMSHTC-RGTISLRGAI---IQT--EDSC----TFIISNGV 82
+RW VL G LS+++ + G+I LR I ++ + C TF +
Sbjct: 21 HRRWCVLRGGYLSFWKYPEDEEKKKPIGSIDLRKCINEKVEPASRELCARPNTFELETLR 80
Query: 83 QTFHIKASNEV-----------ERQRWVTALELA 105
+NE ER W+ AL
Sbjct: 81 PAEDSDGTNEKKRVLLSADTKEERIEWLDALNQT 114
>gnl|CDD|241424 cd13270, PH1_TAPP1_2, Tandem PH-domain-containing proteins 1 and 2
Pleckstrin homology (PH) domain, N-terminal repeat. The
binding of TAPP1 (also called PLEKHA1/pleckstrin
homology domain containing, family A (phosphoinositide
binding specific) member 1) and 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). TAPP1 and TAPP2 contain two sequential PH
domains in which the C-terminal PH domain binds
PtdIns(3,4)P2. 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. 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 = 29.0 bits (65), Expect = 2.4
Identities = 20/88 (22%), Positives = 43/88 (48%), Gaps = 16/88 (18%)
Query: 32 YQKRWFVL--SNGLLSYYRNQ---AEMSHTCRGTISLRGAIIQTEDS---------CTFI 77
+ +R+F+L + GLL +Y + G+++L I + D+ C F+
Sbjct: 25 FLRRYFILDTAAGLLLWYMDNPQNLPDGAAPVGSLNL-TYISKVSDAPKQKPKAEFC-FV 82
Query: 78 ISNGVQTFHIKASNEVERQRWVTALELA 105
I+ + + ++A+++ + + WV AL A
Sbjct: 83 INALSRRYFLQANDQQDLEEWVEALNDA 110
>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 = 28.5 bits (64), Expect = 3.7
Identities = 23/95 (24%), Positives = 44/95 (46%), Gaps = 12/95 (12%)
Query: 30 KGYQKRWFVLSNGLLSYY----RNQAEMSHTCRGTISLRGAIIQT-----EDSCTFIISN 80
+ ++K W L L +Y R + + T + + + G+I Q + F +SN
Sbjct: 29 RKWKKYWVTLKGCTLLFYECDERTGIDDNSTPKHALFVEGSIAQAVPEHPKKDNVFCLSN 88
Query: 81 GV-QTFHIKASNEVERQRWVTALELAKSK--ARQH 112
+ +A+++ E + W+TA+ A + ARQH
Sbjct: 89 SFGDAYLFQATSQTELENWITAIHSACASAFARQH 123
>gnl|CDD|205278 pfam13097, CENP-U, CENP-A nucleosome associated complex (NAC)
subunit. CENP-U is one of the components that assembles
onto the CENP-A-nucleosome associated complex (NAC). The
centromere, which is the basic element of chromosome
inheritance, is epigenetically determined in mammals.
CENP-A, the centromere-specific histone H3 variant,
assembles an array of nucleosomes and it is this that
seems to be the prime candidate for specifying
centromere identity. CENP-A nucleosomes directly recruit
a proximal CENP-A nucleosome associated complex (NAC)
comprised of CENP-M, CENP-N and CENP-T, CENP-U(50),
CENP-C and CENP-H. Assembly of the CENP-A NAC at
centromeres is dependent on CENP-M, CENP-N and CENP-T.
Additionally, there are seven other subunits which make
up the CENP-A-nucleosome distal (CAD) centromere,
CENP-K, CENP-L, CENP-O, CENP-P, CENP-Q, CENP-R and
CENP-S, also assembling on the CENP-A NAC. FTA4 is the
equivalent component of the fission yeast Sim4 complex.
Length = 174
Score = 29.1 bits (65), Expect = 3.8
Identities = 8/31 (25%), Positives = 15/31 (48%)
Query: 259 RQTQRRVLPWKPNTPRRSIIPEKPPGSMQIW 289
+TQ+++ P + PR S S+ +W
Sbjct: 62 SETQKKLSPGRRKKPRSSHSGSDSSDSVHVW 92
>gnl|CDD|241414 cd13260, PH_RASA1, RAS p21 protein activator (GTPase activating
protein) 1 Pleckstrin homology (PH) domain. RASA1 (also
called RasGap1 or p120) is a member of the RasGAP family
of GTPase-activating proteins. RASA1 contains N-terminal
SH2-SH3-SH2 domains, followed by two C2 domains, a PH
domain, a RasGAP domain, and a BTK domain. Splice
variants lack the N-terminal domains. It is a cytosolic
vertebrate protein that acts as a suppressor of RAS via
its C-terminal GAP domain function, enhancing the weak
intrinsic GTPase activity of RAS proteins resulting in
the inactive GDP-bound form of RAS, allowing control of
cellular proliferation and differentiation.
Additionally, it is involved in mitogenic signal
transmission towards downstream interacting partners
through its N-terminal SH2-SH3-SH2 domains. RASA1
interacts with a number of proteins including: G3BP1,
SOCS3, ANXA6, Huntingtin, KHDRBS1, Src, EPHB3, EPH
receptor B2, Insulin-like growth factor 1 receptor,
PTK2B, DOK1, PDGFRB, HCK, Caveolin 2, DNAJA3, HRAS,
GNB2L1 and NCK1. 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 = 28.1 bits (63), Expect = 4.0
Identities = 24/97 (24%), Positives = 39/97 (40%), Gaps = 14/97 (14%)
Query: 18 MKGWLFKWTNYLKGYQKRWFVLSNG--LLSYYRNQAEMSHTCRGTISLR-GAIIQTEDS- 73
KG+L K + K ++ +FVL L ++ N E +G I L ++ DS
Sbjct: 5 KKGYLLKKSGKNKKWKNLYFVLEGAEQHLYFFEN--EKRTKPKGLIDLSYSSVYPVHDSL 62
Query: 74 -----CTFIIS---NGVQTFHIKASNEVERQRWVTAL 102
C I+ N +++ A Q W+ AL
Sbjct: 63 FGRPNCFQIVVRALNESTIYYLCADTAELAQDWMKAL 99
>gnl|CDD|219267 pfam07007, DUF1311, Protein of unknown function (DUF1311). This
family consists of several bacterial proteins of around
120 residues in length. Members of this family contain
four highly conserved cysteine residues. The function of
this family is unknown.
Length = 84
Score = 27.4 bits (61), Expect = 4.6
Identities = 9/41 (21%), Positives = 14/41 (34%)
Query: 455 KQDLKTIRGDQITWIDGRETYCSNIGRLISEVDAIIMRANR 495
+R Q W+ R+ C+ L A + R R
Sbjct: 38 PDAKAALRKAQRAWLKYRDAECAFEASLYEGYAACLARLTR 78
>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 = 27.9 bits (62), Expect = 4.7
Identities = 25/101 (24%), Positives = 44/101 (43%), Gaps = 16/101 (15%)
Query: 19 KGWLFKWTNYLKGYQKRWFVLSN--GLLSYYRNQAEMSHTCRGTISLRGAII-------- 68
+G L K + K ++ R FVL + L YY G I LRG ++
Sbjct: 10 QGCLLKQGHRRKNWKVRKFVLRDDPAYLHYYDPAKG--EDPLGAIHLRGCVVTAVEDNSN 67
Query: 69 ---QTEDSCTF-IISNGVQTFHIKASNEVERQRWVTALELA 105
+ + F II+ ++++A+ ER W+ A+++A
Sbjct: 68 PAKGSVEGNLFEIITADEVHYYLQAATPAERTEWIKAIQMA 108
>gnl|CDD|241254 cd01219, PH1_FGD1, FYVE, RhoGEF and PH domain
containing/faciogenital dysplasia protein 1 pleckstrin
homology (PH), N-terminal domain. In general, FGDs have
a RhoGEF (DH) domain, followed by an N-terminal PH
domain, a FYVE domain and a C-terminal PH domain. All
FGDs are guanine nucleotide exchange factors that
activates the Rho GTPase Cdc42, an important regulator
of membrane trafficking. The RhoGEF domain is
responsible for GEF catalytic activity, while the
N-terminal PH domain is involved in intracellular
targeting of the DH domain. Mutations in the FGD1 gene
are responsible for the X-linked disorder known as
faciogenital dysplasia (FGDY). Both FGD1 and FGD3 are
targeted by the ubiquitin ligase SCF(FWD1/beta-TrCP)
upon phosphorylation of two serine residues in its
DSGIDS motif and subsequently degraded by the
proteasome. However, FGD1 and FGD3 induced significantly
different morphological changes in HeLa Tet-Off cells
and while FGD1 induced long finger-like protrusions,
FGD3 induced broad sheet-like protrusions when the level
of GTP-bound Cdc42 was significantly increased by the
inducible expression of FGD3. They also reciprocally
regulated cell motility in inducibly expressed in HeLa
Tet-Off cells, FGD1 stimulated cell migration while FGD3
inhibited it. FGD1 and FGD3 therefore play different
roles to regulate cellular functions, even though their
intracellular levels are tightly controlled by the same
destruction pathway through SCF(FWD1/beta-TrCP). 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 = 107
Score = 28.1 bits (62), Expect = 5.3
Identities = 20/86 (23%), Positives = 40/86 (46%), Gaps = 7/86 (8%)
Query: 33 QKRWFVLSNGLLSYYRNQAEM---SHTCRGTISLRGAIIQTEDSC----TFIISNGVQTF 85
Q R+ +L N L Y + + + R I + G ++ S TF++S ++
Sbjct: 17 QDRYLILFNDRLLYCVPKLRLIGQKFSVRARIDVDGMELKESSSPNLPRTFLVSGKQRSL 76
Query: 86 HIKASNEVERQRWVTALELAKSKARQ 111
++A E E++ W+ A+E ++ Q
Sbjct: 77 ELQARTEEEKKDWIQAIEATINRHEQ 102
>gnl|CDD|241408 cd13254, PH2_ARAP, ArfGAP with RhoGAP domain, ankyrin repeat and PH
domain Pleckstrin homology (PH) domain, repeat 2. 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
second 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 = 90
Score = 27.3 bits (61), Expect = 5.5
Identities = 20/76 (26%), Positives = 38/76 (50%), Gaps = 2/76 (2%)
Query: 29 LKGYQKRWFVLSNGLLSY-YRNQAEMSHTCRGT-ISLRGAIIQTEDSCTFIISNGVQTFH 86
L+G++ + + +G + Y+N+ E T I + A ++ D +F ++ + F
Sbjct: 14 LRGHKSKVYTALSGDKVWLYKNEQEFRLGIGITVIDMNVANVKDVDKRSFDLTTPYRIFS 73
Query: 87 IKASNEVERQRWVTAL 102
A +E E+Q WV AL
Sbjct: 74 FTAESEREKQEWVEAL 89
>gnl|CDD|237272 PRK13017, PRK13017, dihydroxy-acid dehydratase; Provisional.
Length = 596
Score = 29.5 bits (67), Expect = 5.5
Identities = 15/49 (30%), Positives = 24/49 (48%), Gaps = 5/49 (10%)
Query: 393 WKAWQDLAVHSKFRGKYIQVTPA-----GRFNLVFTKSSMAVLHEVLGM 436
WKA + LA +++++ + G N + T S+M L E LGM
Sbjct: 173 WKARELLAAGEIDYEEFMELVASSAPSVGHCNTMGTASTMNALAEALGM 221
>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 = 27.7 bits (62), Expect = 6.2
Identities = 11/20 (55%), Positives = 14/20 (70%)
Query: 20 GWLFKWTNYLKGYQKRWFVL 39
GWL K Y+K ++ RWFVL
Sbjct: 7 GWLTKRGEYIKTWRPRWFVL 26
>gnl|CDD|234522 TIGR04249, SCM_chp_ScmC, SynChlorMet cassette protein ScmC. A
biosynthesis cassette found in Syntrophobacter
fumaroxidans MPOB, Chlorobium limicola DSM 245,
Methanocella paludicola SANAE, and delta proteobacterium
NaphS2 contains two PqqE-like radical SAM/SPASM domain
proteins, a PqqD homolog, and a conserved hypothetical
protein. These components suggest modification of a
ribosomally produced peptide precursor, but the
precursor has not been identified. Members of this
family are designated ScmC.
Length = 292
Score = 28.3 bits (63), Expect = 9.0
Identities = 18/67 (26%), Positives = 27/67 (40%), Gaps = 8/67 (11%)
Query: 114 LVAAFSTSAYSTTAVRTGKPFNPLLGETYECDRTADAGWKAFSEQVSHHP-PIAAQYVEG 172
L+AA + ST R G P+ + D G++A HP P + ++ G
Sbjct: 141 LLAASGGTGKSTCCRRIGDPWRCHCDDESLVVPDTDKGYRA-------HPFPTWSNFLFG 193
Query: 173 KAWKAWQ 179
K WQ
Sbjct: 194 SEEKTWQ 200
Database: CDD.v3.10
Posted date: Mar 20, 2013 7:55 AM
Number of letters in database: 10,937,602
Number of sequences in database: 44,354
Lambda K H
0.319 0.132 0.408
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: 27,216,953
Number of extensions: 2586654
Number of successful extensions: 2168
Number of sequences better than 10.0: 1
Number of HSP's gapped: 2105
Number of HSP's successfully gapped: 94
Length of query: 538
Length of database: 10,937,602
Length adjustment: 102
Effective length of query: 436
Effective length of database: 6,413,494
Effective search space: 2796283384
Effective search space used: 2796283384
Neighboring words threshold: 11
Window for multiple hits: 40
X1: 16 ( 7.4 bits)
X2: 38 (14.6 bits)
X3: 64 (24.7 bits)
S1: 41 (21.8 bits)
S2: 61 (27.5 bits)