UniProtSummary | FUNCTION:Functionsasareceptorformembrane-boundligandsJagged1,Jagged2andDelta1toregulatecell-fatedetermination.Uponligandactivationthroughthereleasednotchintracellulardomain(NICD)itformsatranscriptionalactivatorcomplexwithRBP-Jkappaandactivatesgenesoftheenhancerofsplitlocus.Affectstheimplementationofdifferentiation,proliferationandapoptoticprograms.MaybeimportantforfolliculardifferentiationandpossIBLycellfateselectionwithinthefollicle.Duringcerebellardevelopment,mayfunctionasareceptorforneuronalDNERandmaybeinvolvedinthedifferentiationofBergmannglia(Bysimilarity).ActsinstructivelytocontrolthecellfatedeterminationofCNSmultipotentProgenitorcells,resultinginastroglialinductionandneuron/oligodendrocytesuppression.
SUBUNITSTRUCTURE:HeterodimerofaC-terminalfragmentN(TM)andanN-terminalfragmentN(EC)whichareprobablylinkedbydisulfidebonds.InteractswithDNER,DTX1,DTX2andRBPSUH.AlsointeractswithMAML1,MAML2andMAML3whichactastranscriptionalcoactivatorsforNOTCH1(Bysimilarity).
SUBCELLULARLOCATION:Cellmembrane;Single-passtypeImembraneprotein(Bysimilarity).
Notch1intracellulardomain:Nucleus(Bysimilarity).Note:FollowingproteolyticalprocessingNICDistranslocatedtothenucleus(Bysimilarity).
TISSUESPECIFICITY:Expressedinthebrain,kidneyandspleen.Expressedinpostnatalcentralnervoussystem(CNS)germinalzonesand,inearlypostnatallife,withinnumerouscellsthroughouttheCNS.Foundinbothsubventricularandventriculargerminalzones.
DEVELOPMENTALSTAGE:Intheembryo,highestlevelsoccurbetweendays12and14anddecreaserapidlytomuchlowerlevelsintheadult.
PTM:Synthesizedintheendoplasmicreticulumasaninactiveformwhichisproteolyticallycleavedbyafurin-likeconvertaseinthetrans-Golginetworkbeforeitreachestheplasmamembranetoyieldanactive,ligand-accessibleform.CleavageresultsinaC-terminalfragmentN(TM)andaN-terminalfragmentN(EC).Followingligandbinding,itiscleavedbyTNF-alphaconvertingenzyme(TACE)toyieldamembrane-associatedintermediatefragmentcallednotchextracellulartruncation(NEXT).Thisfragmentisthencleavedbypresenilindependentgamma-secretasetoreleaseanotch-derivedpeptidecontainingtheintracellulardomain(NICD)fromthemembrane(Bysimilarity).
Phosphorylated(Bysimilarity).
O-glycosylatedontheEGF-likedomains.ContainsbothO-linkedfucoseandO-linkedglucose(Bysimilarity).
SEQUENCESIMILARITIES:BelongstotheNOTCHfamily.
Contains5ANKrepeats.
Contains36EGF-likedomains.
Contains3LNR(Lin/Notch)repeats. |