Vaccinia virus(VV) is a double-stranded DNA virus that replicates and multipli es in the cytoplasm of infected cells using both virally encoded proteins and resourc es of the host *** causes relatively mild symptoms i...
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Vaccinia virus(VV) is a double-stranded DNA virus that replicates and multipli es in the cytoplasm of infected cells using both virally encoded proteins and resourc es of the host *** causes relatively mild symptoms in humans infected natural ***,it has been reported that VV results in several serious side effects,inc luding encephalitis,eczema after vaccination,generalized and progressive poxvirus in fections,as well as some less severe *** complications were recently
目的:构建猪β2-微球蛋白(Sβ2m)基因的原核表达载体,使其能在大肠杆菌中得到高效表达并能纯化,为构建猪MHC-Ⅰ类分子肽四聚体奠定基础。方法:采用RT-PCR技术从猪外周血单核细胞(PBMC)中扩增出去信号肽的S2m基因,克隆至pET-28a(+)高效表达载体后进行化学诱导表达,利用Ni2+NTA鏊合物树脂柱对表达产物进行了纯化,用SDS-PAGE和 Western blotting法对表达产物进行鉴定。结果:成功构建了pET-SD2m表达载体,表达产物以包涵体的形式存在,分别占全菌和不溶性蛋白的40.4%和91.7%,并在变性条件下对包涵体中的重组Sβ2m进行了纯化,获得了高纯度的Sβ2m,结论:成功表达、纯化了Sβ2m,为进一步利用亲和素在体外构建猪MHC-Ⅰ类分子肽四聚体奠定基础。
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