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OverlapPCR克隆黄牛脂肪特异性磷脂酶A2基因(AdPLA)和其原核表达.pdf

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农业生物技术学报,2011年,第 19卷,第6期,第 1051~1055页 JournalofAgriculturalBiotechnology,2011,Vo1.19,No.6,1051-1055 研究报告 ALetter OverlapPCR克隆黄牛脂肪特异性磷脂酶A2基因(AdPLA)及其原核 表达 朱金龙 孙晓梅 张亚 蓝贤勇 雷初朝 陈宏 西北农林科技大学动物科技学院,陕西省农业分子生物学重点实验室,杨凌 712100 通讯作者,chenhong1212@263.net 摘 要 脂肪特异性磷脂酶A2基因(adipose.specificphospholipaseA2,AdPLA)在脂肪组织甘油三酯水解过 程中发挥着重要的调节作用,为了构建黄牛AdPLA基因原核表达系统,本研究通过OverlapPCR方法从黄 牛(Bosto2.zrl~)基因组DNA中得到了AdPLA基因编码区全长,将其克隆到pGM—T载体上,阳性克隆经测序 表明,与NCBI公布的序yjl(GenBankNo.NM 001075280)完全一致。阳性质粒经BamHI和HindIII双酶切 后,将其定向重组到pET28a(+)原核表达载体上,转化感受态大肠杆菌(Escherichiacoli)BL21(DE3)中,用 IPTG诱导融合蛋 白表达。SDS.PAGE电泳表明,融合蛋 白His—AdPLA在大肠杆菌中表达,证明成功构建了 AdPLA基因原核表达系统,为进一步研究黄牛AdPLA基因的功能和AdPLA蛋 白产品开发提供了依据。 关键词 黄牛,脂肪特异性磷脂酶A2基因 dPLA),原核表达,OverlapPCR CloningofCattleAdipose—specificphospholipaseA2Gene dPLA)by OverlapPCRandItsProkaryoticExpression ZhuJinlong SunXiaomei ZhangYa LanXianyong LeiChuzhao ChenHong’ CollegeofAnimalScienceandTechnology,NorthwestAgricuturalnadForestryUniversity,ShaanxiKeyLaboratory ofMolecularBioloyg for Agnculture,ynagling712100,China Correspondingauthor,chenhongl212@263.net DOI:10.3969~.issn.1674—7968.2011.06.010 Abstract Adipose—specificphospholipaseA2gene dPLA)isamajorregulatorofadipocytelipolysis,andin ordertoconstructtheprokaryoticexpressionsystem ofcattleAdPLA gene,thecodingsequenceofAdPLA gene wasobtainedbyOverlapPCRmethodfromcattle(Bostaurus)genomicDNAnadclonedintopGM—Tvector,the positiveclonesequencingresultwassameasthesequenceinGenBank (GenBankNo.NM_001075280).The positiveplasmidwasdigestedwithBamH IandHindlll,thenthefragmentwasligatedwiththeexpressionvector pET28a(+),therecombinedplasmidwastransformedintoEscherichiacoliBL21(DE3)andinducedwithIPTG. SDS—PAGE resultshowed thatthe fusion protein His-AdPLA wasexpressed in E.coli,which indicated the prokaryoticexpressionsystemofrecombinedvectorpET28a(+) dPLAwasconsturctedsuccessuflly.Thisstudy providesagoodfoundationforfurtherresearch ofcattleAdPLA geneand laysapathwayfordevelopinghte AdPLA proteinproducti
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