猪A组轮状病毒Vp7基因与乳酸菌非抗性表达载体的重组及在大肠杆菌中的表达  

Expression of Recombinant Vp7 Gene of Porcine Rotavirus A with Non-antibiotic Lactobacillus Vector in Escherichia coli

作　　者：王春凤[1] 王会岩[1] 于守平[1] 刘尚高[2] 

机构地区：[1]吉林农业大学动物科学与技术学院,长春130118 [2]中国农业大学动物医学院,北京100094

出　　处：《畜牧兽医学报》2005年第9期964-968,共5页ACTA VETERINARIA ET ZOOTECHNICA SINICA

基　　金：国家863计划(2003AA241121002);吉林省科技厅项目(20020220);国家自然科学基金项目(30200199);吉林省杰出青年基金(20030118);中国博士后科学基金项目(2002031156);吉林农业大学青年教师启动基金(2002-QQN-002)

摘　　要：The antigenic determinants of Vp7 gene of porcine rotavirus A were amplified from cells infected with rotavirus by the reverse transcription-polymerase chain reaction (RT-PCR), and a 981bp cDNA segment was acquived. Using T-A cloning technique, the PCR product was cloned into pGEM-T vector. Cloning plasmid pGEM-T-Vp7 and the prokaryotic expression shuttle vector between E.coli and Lactobacillus pW425t were digested by SacI and KpnI double enzymes, respectively. The purified Vp7 gene was subcloned into the expression vector pW425t. Thus,the recombinant pW425t-Vp7 was constructed, and then was transformed into the competence thyA gene-mutant E.coli X13. Treated lysates of bacterium were loaded directly onto SDS-PAGE, on which approximately 37.07 ku exogenous protein was observed and it was about 15% of the total protein . The protein was further analyzed using Western blot, which indicated that the protein was reactive with the antibody of rotavirus A. The results lay foundation for further studies on the Lactobacillus subunit vaccine and DNA vaccine of Vp7 gene in prevention of porcine rotavirus.The antigenic determinants of Vp7 gene of porcine rotavirus A were amplified from cells infected with rotavirus by the reverse transcription--polymerase chain reaction （RT-PCR）, and a 981bp eDNA segment was acquired. Using T-A cloning technique, the PCR product was cloned into pGEM-T vector. Cloning plasmid pGEM-T-Vp7 and the prokaryotic expression shuttle vector between E. coli and Lactobacillus pW425t were digested by SacI and KpnI double enzymes, respectively. The purified Vp7 gene was subcloned into the expression vector pW425t. Thus,the recombinant pW425t-Vp7 was constructed, and then was transformed into the competence thyA gene-mutant E. coli X13. Treated lysates of bacterium were loaded directly onto SDS-PAGE, on which approximately 37.07 ku exogenous protein was observed and it was about 15% of the total protein. The protein was further analyzed using Western blot, which indicated that the protein was reactive with the antibody of rotavirus A. The results lay foundation for further studies on the Lactobacillus subunit vaccine and DNA vaccine of Vp7 gene in prevention of porcine rotavirus.

关 键 词：轮状病毒 VP7基因 乳酸菌表达载体 大肠杆菌 表达 

分 类 号：S852.659.4[农业科学—基础兽医学] Q786[农业科学—兽医学]