SH3BP1 (基因名), SH3 domain-binding protein 1 (蛋白名), 3BP1_HUMAN.
Human SH3BP1/ SH3 domain-binding protein 1 Recombinant Protein
>90% by SDS-PAGE
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50mM NaH2PO4, 500mM NaCl Buffer with 500mM Imidazole, 10%glycerol(PH8.0)
Store at -20°C. (Avoid repeated freezing and thawing.)
Interacts with RAC1 (By similarity). Interacts with the exocyst via EXOC4 and EXOC8; required for the localization of both SH3BP1 and the exocyst to the leading edge of migrating cells (PubMed:21658605). Interacts with CD2AP and CGNL1; probably part of a complex at cell junctions (PubMed:22891260). Interacts with CAPZA1; recruits CAPZA1 to forming cell junctions (PubMed:22891260). May interact with AFDN (PubMed:22891260). Interacts with PLXND1; they dissociate upon SEMA3E binding to PLXND1 allowing SH3BP1 to transduce downstream signal through RAC1 inactivation (PubMed:24841563). Interacts with ABL1, GRB2 and SRC (via SH3 domain) (By similarity).
GTPase activating protein (GAP) which specifically converts GTP-bound Rho-type GTPases including RAC1 and CDC42 in their inactive GDP-bound form. By specifically inactivating RAC1 at the leading edge of migrating cells, it regulates the spatiotemporal organization of cell protrusions which is important for proper cell migration (PubMed:21658605). Also negatively regulates CDC42 in the process of actin remodeling and the formation of epithelial cell junctions (PubMed:22891260). Through its GAP activity toward RAC1 and/or CDC42 plays a specific role in phagocytosis of large particles. Specifically recruited by a PI3 kinase/PI3K-dependent mechanism to sites of large particles engagement, inactivates RAC1 and/or CDC42 allowing the reorganization of the underlying actin cytoskeleton required for engulfment (PubMed:26465210). It also plays a role in angiogenesis and the process of repulsive guidance as part of a semaphorin-plexin signaling pathway. Following the binding of PLXND1 to extracellular SEMA3E it dissociates from PLXND1 and inactivates RAC1, inducing the intracellular reorganization of the actin cytoskeleton and the collapse of cells (PubMed:24841563).
Cell projection Cell junction Tight junction Cell junction Adherens junction Cell projection Phagocytic cup Nucleus Cytoplasm Cytosol Localizes at the leading edge of migrating cells (PubMed:21658605, PubMed:24841563). Accumulation at forming phagocytic cups is PI3 kinase/PI3K-dependent and is specific for sites of large particles engagement and their phosphatidylinositol 3,4,5-triphosphate membrane content (PubMed:26465210).
MMKRQLHRMR | QLAQTGSLGR | TPETAEFLGE | DLLQVEQRLE | PAKRAAHNIH |
KRLQACLQGQ | SGADMDKRV | KKLPLMALST | TMAESFKELD | PDSSMGKALE |
MSCAIQNQLA | RILAEFEMTL | E RDVLQPLS | RLSEEELPAI | LKHKKSLQKL |
VSDWNTLKSR | LSQATKNSGS | SQGLGGSPGS | HS HTTMANK | VETLKEEEEE |
LKRKVEQCRD | EYLADLYHFV | TKEDSYANYF | IRLLEIQADY | HRR SLSSLD |
TALAELRENH | GQADHSPSMT | ATHFPRVYGV | SLATHLQELG | REIALPIEAC |
VMML LSEGM | KEEGLFRLAA | GASVLKRLKQ | TMASDPHSLE | EFCSDPHAVA |
GALKSYLREL | PEPLM TFDL | YDDWMRAASL | KEPGARLQAL | QEVCSRLPPE |
NLSNLRYLMK | FLARLAEEQE | VNKMTP SNI | AIVLGPNLLW | PPEKEGDQAQ |
LDAASVSSIQ | VVGVVEALIQ | SADTLFPGDI | NFNVSGL FS | AVTLQDTVSD |
RLASEELPST | AVPTPATTPA | PAPAPAPAPA | PALASAATKE | RTESEVPP R |
PASPKVTRSP | PETAAPVEDM | ARRTKRPAPA | RPTMPPPQVS | GSRSSPPAPP |
LPPGSGSPG | TPQALPRRLV | GSSLRAPTVP | PPLPPTPPQP | ARRQSRRSPA |
SPSPASPGPA | SPSPVSLSNP | AQVDLGAAT | AEGGAPEAIS | GVPTPPAIPP |
QPRPRSLASE | TN
"The DNA sequence of human chromosome 22."
"Phosphoinositide 3-kinase enables phagocytosis of large particles by terminating actin assembly through Rac/Cdc42 GTPase-activating proteins."
"An image-based RNAi screen identifies SH3BP1 as a key effector of Semaphorin 3E-PlexinD1 signaling."
"A novel Rac1 GAP splice variant relays poly-Ub accumulation signals to mediate Rac1 inactivation."
"Epithelial junction formation requires confinement of Cdc42 activity by a novel SH3BP1 complex."
"SH3BP1, an exocyst-associated RhoGAP, inactivates Rac1 at the front to drive cell motility."
"Complete sequencing and characterization of 21,243 full-length human cDNAs."
"A genome annotation-driven approach to cloning the human ORFeome."
"The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)."
"Identification of novel SH3 domain ligands for the Src family kinase Hck. Wiskott-Aldrich syndrome protein (WASP), WASP-interacting protein (WIP), and ELMO1."
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