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时间:2019-03-06
《巴西橡胶树磷脂酰肌醇转移蛋白cdna的克隆及其序列分析》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、基因组学与应用生物学,2010年,第29卷,第1期,第164—169页GenomicsandAppliedBiology,2010,go1.29,No.1,164—169数据分析AnAnalysis巴西橡胶树磷脂酰肌醇转移蛋白eDNA的克隆及其序列分析罗明武邓柳红1海南大学材料与化工学院,海口,570228;2中国热带农业科学院热带生物技术研究所,海口,5711O1通讯作者,dengliuhong168@163.com摘要本文从巴西橡胶树Heveabrasiliensis)差减eDNA文库中筛选到一个与磷脂酰肌醇转移蛋(~(phos.phatidylinositoltransferprot
2、ein)同源性较高的基因片段,并根据该基因片段序列信息,设计特异性引物,采用eDNA末端快速扩增技术RACE(rapidamplificationofeDNAends)进行差异片段的5’和3’端的扩增,并获得长度为1081bp的全长eDNA克隆R291(GenBank登陆号:AY589690)。序列分析表明,该基因包含702bp的开放阅读框,编码234个氨基酸,推测其蛋白质的分子量为26.8kD,等电点为6.51,有一个的跨膜螺旋区(氨基酸位点为83-103)。R291基因含有一个脂质结合保守区(Secl4p.1ikelipid—bindingdomain),具有CRAL—TRIO脂质结合
3、结构域,推测该基因是一个磷脂酰肌醇转移蛋白基因。该基因的克隆将为橡胶树磷脂酰肌醇代谢的研究奠定了基础,将有助于进一步了解磷脂酰肌醇代谢与胶乳再生之间的关系。关键词巴西橡胶树,胶乳,磷脂酰肌醇转移蛋白,RACE,序列分析CloningandSequenceAnalysisofPhosphatidylinositolTransferProteincD—NAfromHeyeabrasilensisLuoMingwuDengLiuhonglCollegeofMaterialsScienceandChemicalEngineering,HainanUniversity,Haikou,570228;2
4、InstituteofTropicalBioscienceandBiotechnologyChineseAcademyofTropicalAgriculturalSciences,Haikou,571101Correspondingauthor,dengliuhong168@163.comDOI:10.3969/gab.029.000164AbstractInthispaper,aeDNAclonewasisolatedrelatedtolipidtransportationandmetabolismbyscreeningofasubtractedlatexeDNAlibraryofHev
5、eabrasiliensis.Accordingtoitssequencesinformation,anovelfull—lengtheDNAtermedR291(GenBanknumber:AY589690)wasobtainedbyusingrapidamplificationofeDNAends(RACE).R291was1081bplongcontaininga702bpORF,encoding234aminoacidswithatheoreticalmolecularweightof26.8kDandanisoelectricpointof6.51.Inaddition,hydr
6、opathyandtransmembranemotifanalysisofde—ducedaminoacidsequencesindicatedthatR291possessedatransmembranespanningdomain(fromtheaminoacidsitefrom83to103).TheresultoftheconserveddomainsanalysisdemonstratedthatR291hadaSecl4p—likelipid—bindingdomainandaCRAL/TRIOregion.MultialignmentpresumedthatR291might
7、beaphosphatidylinos—itoltransferproteingene.ThecloningofthisgenewouldestablishthebasicformetabolisimofHeveabrasiliensisphosphatidylinositol,andwouldhelptofurtherunderstandrelationbetweenmetabolisimofphosphatidyli
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