Characterization of Function of Three Domains in Dishevelled-l： DEP Domain is Responsible for Membrane Translocation of Dishevelled-1-中国期刊网

摘要 Wntsignalingplaysanimportantroleinembryogenesisandtumorgenesis.AlthoughthemechanismabouthowWntstransducetheirsignalingfromreceptorfrizzled(Fz)tocytosolhasnotbeenunderstood,dishevelled(Dvl)proteinwasconsideredastheintersectionofWntsignaltraffic.Inthisstudy,wecharacterizedthefunctionofthreedomains(DIX,PDZandDEP)ofDvl-1incanonicalWntsignaltransductionandDvl-1membranetranslocation.ItwasfoundbothDIXandDEPdomainweresufficienttoblockWnt-3a-inducedLEF-1transcriptionalactivityandfreecytosolβ-cateninaccumulation;whereasPDZdomainandafunctionalmutantformofDEPdomain(DEP-KM)hadnoeffectoncanonicalWntsignaling.Inaddition,whencotransfectedwithFz-7,DEPdomain,butnotDIX,PDZorDEP-KM,translocatedandco-localizedwithFz-7totheplasmamembrane,whichwassimilartoDvl-1.Furthermore,itwasDEPdomainthatcouldblockFz-7-inducedmembranetranslocationofDvl-1viaapossiblecompetitivemechanism.TheseresultsstronglysuggestthatDEPdomainisresponsibleforthemembranetranslocationofDvl-1proteinuponWntsignalstimulation.

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Characterization of Function of Three Domains in Dishevelled-l： DEP Domain is Responsible for Membrane Translocation of Dishevelled-1

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Characterization of Function of Three Domains in Dishevelled-l： DEP Domain is Responsible for Membrane Translocation of Dishevelled-1

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