农业生物技术学报JournalofAgriculturalBiotechnology2008,16(5):891-897利用免疫共沉淀技术研究RSVCP、SP和NSvc4蛋白的互作术·研究论文·鹿连明,秦梅玲,王萍,兰汉红,牛晓庆,谢荔岩,吴祖建料,谢联辉料(福建农林大学植物病毒研究所,福建省植物病毒学重点实验室,福州350002)摘要:为了检测水稻条纹病毒(Ricestr~evirus,RSV)外壳蛋I~(coatprotein,CP)、病害特异蛋l~(disease—specialprotein,SP)和可能的运动蛋白NSvc4自身和两两之间的互作关系,首先通过PCR扩增获得了分别融合有HA或c.Myc标签的RSVCP、SP和NSvc4基因,并将其插入到植物表达载体pEGAD或pKYLX71:355"2中。重组质粒转化根癌农杆菌(Agrobacteriumtume.faciens)EHA105后,将含有不同重组质粒的根癌农杆菌菌液混合后注射烟草(Nicotianabenthamiana)n-~片。提取烟草中瞬时表达的蛋白,以HA或c—Myc抗体进行免疫共沉淀试验,最后免疫混合物通过c—Myc抗体或HA抗体进行Westernblot检测,确定蛋白的互作情况。结果表明,RSVCP蛋白自身能够发生互作,而CP与SP,CP与NSvc4,SP与sP,sP与NSvc4,及NSvc4与NSvc4蛋向之问均未有检测到互作现象。关键词:水稻条纹病毒;免疫共沉淀;蛋白互作中图分类号:SI88文献标识码:A文章编号:1006.1304(2008)05—0891.07StudiesontheInteractionsbetweenRSVCP.SPandNSvc4ProteinsUsingCo—immunoprecipitationTechnologyLULian—ruing,QMei-ling,WANGPing,LANHan—hong,NIUXiao—qing,X1ELi—yan,、VuZu-jian,XIELian—hui(InstituteofPlantVirology,KeyLaboratoryofPlantVirologyofFujianProvince,FujianAgricultureandForestryUniversity,Fuzhou350002.cbina)Al,BtraⅨ:InordertodetecttheinteractionbetweenRicesfrevirus(RSV)coatprotein(CP),disease—specialprotein(SP)andNSvc4,theHA—taggedorc—Myc—taggedCP,SPandNSvc4ofRSVwereamplifiedbyPCR,andtheninsertedintoplantexpressionvectorpEGADorpKYLX71:35S2.TherecombinantplasmidsweretransformedintoAgrobacteriumtumefaciensEHA105,andtheEHA105containingdifferentrecombinantwasinjectedintoNicotianabenthamiana.ThetotalproteinswereisolatedfromAgrobacterium—infiltratedMbenthamianaleaves.andCO—immunoprecipitatedwithHAorc—Mycantibody.TheimmunocomplexesweredetectedbyWesternblotwithC-MycorHAantibodytoidentifytheinteractionbetwe...