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1、南方農(nóng)業(yè)學(xué)報(bào)JournalofSouthernAgriculture2014,45(10):1861—1865ISSN2095—1191;CODENNNXAABhttp://www.nfnyxb.cnDOI:10.3969/j:issn.2095—1191.2014.10.1861大鼠胰島素Ⅱ基因啟動(dòng)子克隆與功能驗(yàn)證韋玲靜,黃碉萌,嚴(yán)雪瑜,蔣欽楊+,蘭干球,郭亞芬(廣西大學(xué)動(dòng)物科學(xué)技術(shù)學(xué)院,南寧530005)摘要:【目的】克隆大鼠胰島素II基因啟動(dòng)子(PdP2)序列并對(duì)其功能進(jìn)行驗(yàn)證,為培育胰島特異性表達(dá)外源基因的轉(zhuǎn)基因動(dòng)物奠定基礎(chǔ)?!痉椒ā扛鶕?jù)Ge
2、nBank中已發(fā)表的R/P2序列(J00748.1)設(shè)計(jì)引物,以大鼠基因組DNA為模板,PCR擴(kuò)增R/P2序列,連接pMDl8.T載體后用H/ridIII和BamI-II進(jìn)行雙酶切,回收R/P2片段并連接至不含啟動(dòng)子的pEGFP.1載體上構(gòu)建真核表達(dá)載倒kpEGFP.1.R/P2。重組質(zhì)粒轉(zhuǎn)染PKl5細(xì)胞,24hA觀察細(xì)胞熒光蛋白表達(dá)情況?!窘Y(jié)果】克隆獲得的R/P2序列與參考序列(J00748.1)的同源性為99.9%,存在3處堿基差異,即從起始密碼子ATG(+I)上游.57處有一個(gè)G堿基缺失,.387處c突變?yōu)锳,.707處插入一個(gè)G堿基。mP2序
3、列存在一個(gè)TATA.box(.206---201位點(diǎn))和一個(gè)CAAT.box(.343~一339位點(diǎn))。以重組質(zhì)粒pEGFP.1.剮P2轉(zhuǎn)染PKl5細(xì)胞,24hA能觀察到綠色熒光?!窘Y(jié)論】克隆獲得的大鼠R/P2序歹IJ具有啟動(dòng)子功能,但活性較CMV啟動(dòng)子弱。關(guān)鍵詞:大鼠;胰島素Ⅱ基因啟動(dòng)子;克隆;功能驗(yàn)證;真核表達(dá)載體中圖分類(lèi)號(hào):Q785文獻(xiàn)標(biāo)志碼:A文章編號(hào):2095一1191(2014)10—1861—05Cloningandfunctionalverificationofrat-?·insulin2genepromoterWEILing-jin
4、g,HUANGYue-meng,LANGan-qiu.YANXue—yu,JIANGQin-yang+,GUOYa—fen(CollegeofAnimalAcienceandTechnology,GuangxiUniversity,Nanning530005,China)Abstract:【Objective】CloningandfunctionalverificationofRatinsulin2promoter(R艘)wereconductedtolaythefoundationforbreedingtransgenicanimalsofspec
5、ificexpressiontargetgenesofinsulin.【Method】AccordingtotheR胞sequence(No.J00748.1)waspublishedinGenBank,apairofprimerwasdesignedtoamplifytheRIP2sequencebyPCRmethod.TheRjP2sequencewasconnectedtothepMDl8一Tvector.therestructuringvectorwasdoublydigestedby/-//ndIIIandBamHI,andthenther
6、ecyclingRIP2sequencewasconnectedtopEGFP—lvectortoconstructthepEGFP—l—RIP2expressionvector.TheconstructingvectorwastransfectedintoPKl5cells.a(chǎn)ndfluorescentproteinexpressionincellswasobservedafter24houm.【Result】TheclonedRJP2sequencewas703bp(一87l一一169sites)inlengthandhad99.9%ofhomo
7、logyt}lereferencesequence(No.J00748.1).r11lereexisted3basemutations,frominitiationcodonATGupstream(+1).Gbasedeletionwasat一57site,C/Amutationat一387site,Gbaseinsertionat一707site.TheRJP2sequencecontained2promoterelements:TATA—box(一206一一201sites)andCAAT—box(一343N--339sites).Greenfl
8、uorescenceWasobservedfromthePKl5cellstransfectedpEGFP—