Exchange Factor for ARF6 Pleckstrin homology (PH) domain; EFA6 (also called PSD/pleckstrin and Sec7 domain containing) is an guanine nucleotide exchange factor for ADP ribosylation factor 6 (ARF6), which is involved in membrane recycling. EFA6 has four structurally related polypeptides: EFA6A, EFA6B, EFA6C and EFA6D. It consists of a N-terminal proline rich region (PR), a SEC7 domain, a PH domain, a PR, a coiled-coil region, and a C-terminal PR. The EFA6 PH domain regulates its association with the plasma membrane. EFA6 activates Arf6 through its Sec7 catalytic domain and modulates this activity through its C-terminal domain, which rearranges the actin cytoskeleton in fibroblastic cell lines. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791 508 NATTYKHGVLTRKTHADMDGKRTPRGRRGWKKFYAVLKGTILYLQKDEYRLDKALSEGDLKNAIRVHHALATRASDYSKK 587
Cdd:cd13295     3 NAVEYKKGYLMRKCCADPDGKKTPFGKRGWKMFYATLKGLVLYLHKDEYGCKKALRYESLRNAISVHHSLATKATDYTKK 82

                          90       100       110       120
                  ....*....|....*....|....*....|....*....|....
gi 1907130791 588 SNVLKLKTADWRVFLFQAPSKEEMLSWILRINLVAAIFSAPAFP 631
Cdd:cd13295    83 PHVFRLRTADWREYLFQASDTKEMQSWIEAINLVAAAFSAPPLP 126

Exchange Factor for ARF6 Pleckstrin homology (PH) domain; EFA6 (also called PSD/pleckstrin and Sec7 domain containing) is an guanine nucleotide exchange factor for ADP ribosylation factor 6 (ARF6), which is involved in membrane recycling. EFA6 has four structurally related polypeptides: EFA6A, EFA6B, EFA6C and EFA6D. It consists of a N-terminal proline rich region (PR), a SEC7 domain, a PH domain, a PR, a coiled-coil region, and a C-terminal PR. The EFA6 PH domain regulates its association with the plasma membrane. EFA6 activates Arf6 through its Sec7 catalytic domain and modulates this activity through its C-terminal domain, which rearranges the actin cytoskeleton in fibroblastic cell lines. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791 508 NATTYKHGVLTRKTHADMDGKRTPRGRRGWKKFYAVLKGTILYLQKDEYRLDKALSEGDLKNAIRVHHALATRASDYSKK 587
Cdd:cd13295     3 NAVEYKKGYLMRKCCADPDGKKTPFGKRGWKMFYATLKGLVLYLHKDEYGCKKALRYESLRNAISVHHSLATKATDYTKK 82

                          90       100       110       120
                  ....*....|....*....|....*....|....*....|....
gi 1907130791 588 SNVLKLKTADWRVFLFQAPSKEEMLSWILRINLVAAIFSAPAFP 631
Cdd:cd13295    83 PHVFRLRTADWREYLFQASDTKEMQSWIEAINLVAAAFSAPPLP 126

Sec7 domain; The Sec7 domain is a guanine-nucleotide-exchange-factor (GEF) for the pfam00025 family.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791 304 CQGVSEAARRLARRLYHLEGFQRCDVARQLGKNNEFSRLVAGEYLSFFDFSGLTLDRALRTFLKAFPLMGETQERERVLT 383
Cdd:pfam01369  26 KGFIEDDPESIAKFLFETPGLDKKAIGEYLGKPDEFNIEVLKAFVDLFDFKGLRIDEALRLFLESFRLPGEAQKIDRIME 105

                          90       100       110       120       130       140       150
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 1907130791 384 HFSRRYCQCNPDDSTSEDGIHTLTCALMLLNTDLHgHVNIGKKMSCQQFIANLDQLNDGQDFAKDLLKTLYNSIKNEKL 462
Cdd:pfam01369 106 AFAERYYEQNPGVFANADAAYVLAYSIIMLNTDLH-NPNVKKKMTLEDFIRNLRGINDGKDFPDEYLEEIYDSIKKNEI 183

ARF guanine nucleotide exchange factor (ARF-GEF); Provisional

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791  307 VSEAARRLARRLYHLEGFQRCDVARQLGKNNEFSRLVAGEYLSFFDFSGLTLDRALRTFLKAFPLMGETQERERVLTHFS 386
Cdd:PLN03076   644 VGESPEEIAAFLKDASGLNKTLIGDYLGEREDLSLKVMHAYVDSFDFQGMEFDEAIRAFLQGFRLPGEAQKIDRIMEKFA 723

                           90       100       110       120       130       140       150       160
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791  387 RRYCQCNPDDSTSEDGIHTLTCALMLLNTDLHGHVnIGKKMSCQQFIANLDQLNDGQDFAKDLLKTLYNSIKneKLEWAI 466
Cdd:PLN03076   724 ERYCKCNPKAFSSADTAYVLAYSVIMLNTDAHNPM-VKNKMSADDFIRNNRGIDDGKDLPEEFMRSLYERIS--KNEIKM 800

                   ....*
gi 1907130791  467 DEDEL 471
Cdd:PLN03076   801 KEDDL 805

Exchange Factor for ARF6 Pleckstrin homology (PH) domain; EFA6 (also called PSD/pleckstrin and Sec7 domain containing) is an guanine nucleotide exchange factor for ADP ribosylation factor 6 (ARF6), which is involved in membrane recycling. EFA6 has four structurally related polypeptides: EFA6A, EFA6B, EFA6C and EFA6D. It consists of a N-terminal proline rich region (PR), a SEC7 domain, a PH domain, a PR, a coiled-coil region, and a C-terminal PR. The EFA6 PH domain regulates its association with the plasma membrane. EFA6 activates Arf6 through its Sec7 catalytic domain and modulates this activity through its C-terminal domain, which rearranges the actin cytoskeleton in fibroblastic cell lines. PH domains have diverse functions, but in general are involved in targeting proteins to the appropriate cellular location or in the interaction with a binding partner. They share little sequence conservation, but all have a common fold, which is electrostatically polarized. Less than 10% of PH domains bind phosphoinositide phosphates (PIPs) with high affinity and specificity. PH domains are distinguished from other PIP-binding domains by their specific high-affinity binding to PIPs with two vicinal phosphate groups: PtdIns(3,4)P2, PtdIns(4,5)P2 or PtdIns(3,4,5)P3 which results in targeting some PH domain proteins to the plasma membrane. A few display strong specificity in lipid binding. Any specificity is usually determined by loop regions or insertions in the N-terminus of the domain, which are not conserved across all PH domains. PH domains are found in cellular signaling proteins such as serine/threonine kinase, tyrosine kinases, regulators of G-proteins, endocytotic GTPases, adaptors, as well as cytoskeletal associated molecules and in lipid associated enzymes.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791 508 NATTYKHGVLTRKTHADMDGKRTPRGRRGWKKFYAVLKGTILYLQKDEYRLDKALSEGDLKNAIRVHHALATRASDYSKK 587
Cdd:cd13295     3 NAVEYKKGYLMRKCCADPDGKKTPFGKRGWKMFYATLKGLVLYLHKDEYGCKKALRYESLRNAISVHHSLATKATDYTKK 82

                          90       100       110       120
                  ....*....|....*....|....*....|....*....|....
gi 1907130791 588 SNVLKLKTADWRVFLFQAPSKEEMLSWILRINLVAAIFSAPAFP 631
Cdd:cd13295    83 PHVFRLRTADWREYLFQASDTKEMQSWIEAINLVAAAFSAPPLP 126

Sec7 domain; The Sec7 domain is a guanine-nucleotide-exchange-factor (GEF) for the pfam00025 family.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791 304 CQGVSEAARRLARRLYHLEGFQRCDVARQLGKNNEFSRLVAGEYLSFFDFSGLTLDRALRTFLKAFPLMGETQERERVLT 383
Cdd:pfam01369  26 KGFIEDDPESIAKFLFETPGLDKKAIGEYLGKPDEFNIEVLKAFVDLFDFKGLRIDEALRLFLESFRLPGEAQKIDRIME 105

                          90       100       110       120       130       140       150
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 1907130791 384 HFSRRYCQCNPDDSTSEDGIHTLTCALMLLNTDLHgHVNIGKKMSCQQFIANLDQLNDGQDFAKDLLKTLYNSIKNEKL 462
Cdd:pfam01369 106 AFAERYYEQNPGVFANADAAYVLAYSIIMLNTDLH-NPNVKKKMTLEDFIRNLRGINDGKDFPDEYLEEIYDSIKKNEI 183

ARF guanine nucleotide exchange factor (ARF-GEF); Provisional

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791  307 VSEAARRLARRLYHLEGFQRCDVARQLGKNNEFSRLVAGEYLSFFDFSGLTLDRALRTFLKAFPLMGETQERERVLTHFS 386
Cdd:PLN03076   644 VGESPEEIAAFLKDASGLNKTLIGDYLGEREDLSLKVMHAYVDSFDFQGMEFDEAIRAFLQGFRLPGEAQKIDRIMEKFA 723

                           90       100       110       120       130       140       150       160
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791  387 RRYCQCNPDDSTSEDGIHTLTCALMLLNTDLHGHVnIGKKMSCQQFIANLDQLNDGQDFAKDLLKTLYNSIKneKLEWAI 466
Cdd:PLN03076   724 ERYCKCNPKAFSSADTAYVLAYSVIMLNTDAHNPM-VKNKMSADDFIRNNRGIDDGKDLPEEFMRSLYERIS--KNEIKM 800

                   ....*
gi 1907130791  467 DEDEL 471
Cdd:PLN03076   801 KEDDL 805

ARHGAP21 and related proteins pleckstrin homology (PH) domain; ARHGAP family genes encode Rho/Rac/Cdc42-like GTPase activating proteins with a RhoGAP domain. These proteins functions as a GTPase-activating protein (GAP) for RHOA and CDC42. ARHGAP21 controls the Arp2/3 complex and F-actin dynamics at the Golgi complex by regulating the activity of the small GTPase Cdc42. It is recruited to the Golgi by to GTPase, ARF1, through its PH domain and its helical motif. It is also required for CTNNA1 recruitment to adherens junctions. ARHGAP21 and it related proteins all contains a PH domain and a RhoGAP domain. Some of the members have additional N-terminal domains including PDZ, SH3, and SPEC. The ARHGAP21 PH domain interacts with the GTPbound forms of both ARF1 and ARF6 ARF-binding domain/ArfBD. The members here include: ARHGAP15, ARHGAP21, and ARHGAP23. 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.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791 512 YKHGVLTRKTHADMDGKRTprGRRGWKKFYAVLKGTILYLQKDEYRLDKALS-EGDLKNAIRVHHALATRASDYSKKSNV 590
Cdd:cd01253     1 AREGWLHYKQIVTDKGKRV--SDRSWKQAWAVLRGHSLYLYKDKREQTPALSiELGSEQRISIRGCIVDIAYSYTKRKHV 78

                          90       100
                  ....*....|....*....|....*
gi 1907130791 591 LKLKTADWRVFLFQAPSKEEMLSWI 615
Cdd:cd01253    79 FRLTTSDFSEYLFQAEDRDDMLGWI 103

PH domain; PH stands for pleckstrin homology.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791 528 KRTPRGRRGWKKFYAVLKGTILYLQKDeyrlDKALSEGDLKNAIRVHHALATR--ASDYSKKSNVLKLKTADW---RVFL 602
Cdd:pfam00169   9 KKGGGKKKSWKKRYFVLFDGSLLYYKD----DKSGKSKEPKGSISLSGCEVVEvvASDSPKRKFCFELRTGERtgkRTYL 84

                          90       100
                  ....*....|....*....|.
gi 1907130791 603 FQAPSKEEMLSWILRINLVAA 623
Cdd:pfam00169  85 LQAESEEERKDWIKAIQSAIR 105

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.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791 516 VLTRKTHadmdGKRTPRGRRGWKKFYAVLKGTILYLQKDEYRlDKALSEGDLKNAIRVHHALATRASDYSKKSNVLKLKT 595
Cdd:cd01230    14 FLVHKKN----KKVELATRRKWKKYWVCLKGCTLLFYECDER-SGIDENSEPKHALFVEGSIVQAVPEHPKKDFVFCLSN 88

                          90       100       110
                  ....*....|....*....|....*....|....
gi 1907130791 596 ADWRVFLFQAPSKEEMLSWilrinlVAAIFSAPA 629
Cdd:cd01230    89 SFGDAYLFQATSQTELENW------VTAIHSACA 116

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.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791 528 KRTpRGRRGWKKFYAVLKGTILYLQKD--EYRLDKALSEGDLknairvhHALAtRASDySKKSNVLKLKTADwRVFLFQA 605
Cdd:cd13298    14 KRS-RKTKNWKKRWVVLRPCQLSYYKDekEYKLRRVINLSEL-------LAVA-PLKD-KKRKNVFGIYTPS-KNLHFRA 82

                          90
                  ....*....|....*....
gi 1907130791 606 PSKEEMLSWILRINLVAAI 624
Cdd:cd13298    83 TSEKDANEWVEALREEFRL 101

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.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791 522 HADMDG----KRTPRGRRG--WKKFYAVLKGTILYL---QKDEyrldKAlsEGdlknAIRVHHALATRASDySKKSNVLK 592
Cdd:cd01260    12 RGDCQGwlwkKKEAKSFFGqkWKKYWFVLKGSSLYWysnQQDE----KA--EG----FINLPDFKIERASE-CKKKYAFK 80

                          90       100       110
                  ....*....|....*....|....*....|..
gi 1907130791 593 LKTADWRVFLFQAPSKEEMLSWILRINLVAAI 624
Cdd:cd01260    81 ACHPKIKTFYFAAENLDDMNKWLSKLNMAINK 112

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.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791 532 RGRRGWKKFYAVLKGTILYLQKD--EYRLDKALSEGDLKNAIRVHhalatraSDYSKKSNVLKLKTADWRvFLFQAPSKE 609
Cdd:cd13299    18 KGVNQWKKYWLVLRNRSLSFYKDqsEYSPVKIIPIDDIIDVVELD-------PLSKSKKWCLQIITPEKR-IRFCADDEE 89

                  ....*.
gi 1907130791 610 EMLSWI 615
Cdd:cd13299    90 SLIKWL 95

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.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791 536 GWKKFYAVLKGTILYLqkdeYRLDKalsEGDLKNAIRVHHALAtrasDYS-------KKSNVLKLKTADwRVFLFQAPSK 608
Cdd:cd01233    21 GWVRRWVVLRRPYLHI----YSSEK---DGDERGVINLSTARV----EYSpdqeallGRPNVFAVYTPT-NSYLLQARSE 88

                          90
                  ....*....|.
gi 1907130791 609 EEMLSWILRIN 619
Cdd:cd01233    89 KEMQDWLYAID 99

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.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1907130791 534 RRGWKKFYAVLKGTILYLQKDeyRLD-KALSEGDLKNAIRVhhalatrASDYSK-KSNVLKLKTAdWRVFLFQAPSKEEM 611
Cdd:cd10573    16 VKNWKTRWFVLRRNELKYFKT--RGDtKPIRVLDLRECSSV-------QRDYSQgKVNCFCLVFP-ERTFYMYANTEEEA 85

                  ....
gi 1907130791 612 LSWI 615
Cdd:cd10573    86 DEWV 89