EntrezGeneSummary | Vascularendothelialgrowthfactor(VEGF)isamajorgrowthfactorforendothelialcells.ThisgeneencodesoneofthetworeceptorsoftheVEGF.Thisreceptor,knownaskinaseinsertdomainreceptor,isatypeIIIreceptortyrosinekinase.ItfunctionsasthemainmediatorofVEGF-inducedendothelialproliferation,survival,migration,tubularmorphogenesisandsprouting.Thesignallingandtraffickingofthisreceptorareregulatedbymultiplefactors,includingRabGTPase,P2Ypurinenucleotidereceptor,integrinalphaVbeta3,T-cellproteintyrosinephosphatase,etc..Mutationsofthisgeneareimplicatedininfantilecapillaryhemangiomas. |
UniProtSummary | FUNCTION:Tyrosine-proteinkinasethatactsasacell-surfacereceptorforVEGFA,VEGFCandVEGFD.Playsanessentialroleintheregulationofangiogenesis,vasculardevelopment,vascularpermeABIlity,andembryonichaematopoiesis.Promotesproliferation,survival,migrationanddifferentiationofendothelialcells.PromotesreorganizationoftheactinCytoskeleton.Isoformslackingatransmembranedomain,suchasisoform2andisoform3,mayfunctionasdecoyreceptorsforVEGFA,VEGFCand/orVEGFD.Isoform2playsanimportantroleasnegativeregulatorofVEGFA-andVEGFC-mediatedlymphangiogenesisbylimitingtheamountoffreeVEGFAand/orVEGFCandpreventingtheirbindingtoFLT4.ModulatesFLT1andFLT4signalingbyformingheterodimers.Bindingofvasculargrowthfactorstoisoform1leadstotheactivationofseveralsignalingcascades.ActivationofPLCG1leadstotheproductionofthecellularsignalingmoleculesdiacylglycerolandinositol-1,4,5-trisphosphateandtheactivationofproteinkinaseC.MediatesactivationofMAPK1/ERK2,MAPK3/ERK1andtheMAPkinasesignalingpathway,aswellasoftheAKT1signalingpathway.MediatesphosphorylationofPIK3R1,theregulatorysubunitofphosphatidylinositol3-kinase,reorganizationoftheactincytoskeletonandactivationofPTK2/FAK1.RequiredforVEGFA-mediatedinductionofNOS2andNOS3,leadingtotheproductionofthesignalingmoleculenitricoxide(NO)byendothelialcells.PhosphorylatesPLCG1.PromotesphosphorylationofFYN,NCK1,NOS3,PIK3R1,PTK2/FAKandSRC.
CATALYTICACTIVITY:ATP+a[protein]-L-tyrosine=ADP+a[protein]-L-tyrosinephosphate.
ENZYMEREGULATION:Presentinaninactiveconformationintheabsenceofboundligand.BindingofVEGFA,VEGFCorVEGFDleadstodimerizationandactivationbyautophosphorylationontyrosineresidues.InhibitedbythesmallmoleculePTKinhibitorSU5614((3Z)-5-Chloro-3-[(3,5-dimethyl-1H-pyrrol-2-yl)methylene]-1,3-dihydro-2H-indol-2-one).
SUBUNITSTRUCTURE:InteractswithMYOF.InteractswithVEGFA,VEGFCandVEGFD.MonomerintheabsenceofboundVEGFA,VEGFCorVEGFD.HomodimerinthepresenceofbounddimericVEGFA,VEGFCorVEGFD.CanalsoformheterodimerswithFLT1andFLT4.Interacts(tyrosinephosphorylated)withFYN,NCK1,PLCG1andSHB.InteractswithHIV-1Tat.InteractswithCBL.InteractswithSH2D2A/TSADandGRB2.
SUBCELLULARLOCATION:Isoform1:Cellmembrane;Single-passtypeImembraneprotein.Cytoplasm.Nucleus.Cytoplasmicvesicle.Earlyendosome.Note:Detectedoncaveolae-enrichedlipidraftsatthecellsurface.Isrecycledfromtheplasmamembranetoendosomesandbackagain.PhosphorylationtriggeredbyVEGFAbindingpromotesinternalizationandsubsequentdegradation.VEGFAbindingtriggersinternalizationandtranslocationtothenucleus.Isoforms2and3aresecreted.
TISSUESPECIFICITY:Detectedincornea(atproteinlevel).Widelyexpressed. |