資源描述:
《抗Ⅰ型鴨肝炎病毒RdRp蛋白噬菌體單鏈抗體庫構(gòu)建及單鏈抗體的淘選.pdf》由會員上傳分享,免費在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、第37卷第5期中國預防獸醫(yī)學報VO1.37.No.52015年5月ChineseJournalofPreventiveVeterinaryMedicineMay.2015doi:10.3969~.issn.1008-0589.2015.05.03抗I型鴨肝炎病毒RdRp蛋白噬茵體單鏈抗體庫構(gòu)建及單鏈抗體的淘選王永娟,一,李碧春,沈明君,洪偉鳴,左偉勇’(1.揚州大學動物科學與技術(shù)學院,江蘇揚州225009;2.江蘇農(nóng)牧科技職業(yè)學院江蘇省獸用生物制藥高技術(shù)研究重點實驗室,江蘇泰州225300)摘要:為構(gòu)建抗1型鴨肝炎病毒(DH
2、V.1)RdRp蛋白的單鏈抗體(scFv)庫,并淘選特異性scFv,本研究采用RT.PCR方法從DHV.1基因組中擴增RdRp基因,將其克隆于pET.32a載體中進行重組RdRp蛋白原核表達。將純化的重組蛋白免疫小鼠,以提取的免疫鼠脾臟總RNA為模板,利用抗體輕鏈可變區(qū)(VL)和重鏈可變區(qū)(VH)簡并引物,經(jīng)RT.PCR擴增抗體的VL和VH編碼序列,由Linker序列連接,通過重疊延伸PCR(SOE.PCR1擴增完整的scFv基因(VI_-Linker-V.)。將擴增的seFv基因克隆于pCANTAB5E載體中構(gòu)建噬菌體sc
3、Fv文庫,利用純化的重組RdRp蛋白開展4輪吸附.洗脫.富集以淘選抗RdRp的ScFv;最后對淘選到的陽性ScFv進行可溶性表達,以ELISA方法檢測其免疫結(jié)合活性。結(jié)果顯示,獲得了7株具有良好抗原結(jié)合活性的ScFv。淘選到的DHV.1RdRp特異的基因工程ScFv,為鴨病毒性肝炎防制新策略研究奠定了基礎(chǔ)。關(guān)鍵詞:1型鴨肝炎病毒;RdRp;噬菌體抗體庫;單鏈抗體中圖分類號:$852.65文獻標識碼:A文章編號:1008.0589(2015)05.0334.05ConstructionoOftphagesingle.一chai
4、nantibody(scFl-v)1IibraryforRdRPproteinofduckhepatitisvirustype1andthespecificscFvpanningwANGYong-juan,一,LIBi-chun,SHENMing-jun,HONGWei—ming2,ZUOWei—yonf(1CollegeofAnimalScienceandTechnology,YangzhouUniversity,Yangzhou225009,China;2.JiangsuProvincialKeyLaboratoryof
5、VeterinaryBio-pharmaceuticalHighTechResearch,JiangsuAgri—animalHusbandryVocationalCollege,Taizhou225300,China)Abstract:Toconstructphagedisplaymurinesingle—chainantibodyvariablefragment(scFv)libraryforRdRpproteinofduckhepatitisvirustype1(DHV一1)andscreenthespecificsc
6、FvagainstRdRp,theRdRpgenewasamplifiedfromthegenomicRNAofDHV-1byRT—PCRmethodandclonedintopET一32avectorforexpressioninE.coil.Then,micewereimmunizedwiththeexpressedrecombinantRdRp,andtotalRNAwasextractedfromthespleenofimmunizedmicetoamplifythevariableregionsencodingse
7、quencesoftheheavy(VH)andlightchains(V0withdegenerateprimersbyRT—PCR.Inaddition,thecompletesequenceofscFvwasamplifiedwithalinkersequencebySOE—PCR.Furthermore,scFvsequenceswereclonedintopCANTAB5EvectortoconstructthescFvphagedisplaylibrary.Eventually,usingpurifiedreco
8、mbinantproteinRdRpaspanningantigen,sevenScFvswiththebindingafinitytoRdRpwereidentifiedafter4roundsofprocedurebinding-elution—enrichmentbyELISA.In