机构地区: 华南农业大学兽医学院农业部动物疫病防控重点开放实验室
出 处: 《华南农业大学学报》 2010年第4期118-120,共3页
摘 要: 利用特异性引物从圆环病毒2型(PCV2)毒株克隆出Rep基因,并将其插入到原核表达载体pET28 a和杆状病毒转移载体pFastbacHT(B)上,利用大肠杆菌BL21(DE3)株原核系统以及Bac-to-Bac杆状病毒系统表达Rep蛋白.Western-blotting表明,原核和真核表达系统均能表达出圆环病毒2型Rep蛋白,电泳分析表明,不同系统表达得到的Rep蛋白有不同的电泳特性,揭示Rep蛋白存在翻译后修饰. Rep gene of PCV type 2 was amplified,and further inserted into the prokaryotic expression vector(pET28a) and the eukaryotic transfer vector(pFastbacHT(B)).Rep protein was expressed by both Escherichia coli BL21(DE3) and by baculovirus infected Sf9 cell line.Western-blotting indicated that prokaryotic and eukaryotic Rep proteins were successfully expressed with different electrophoretic characteristics,which revealed that there may be post-translational effects on Rep protein.