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利用SUMO系统高效表达可溶性猪圆环病毒2型Cap蛋白

DOI: 10.7671/j.issn.1001-411X.2012.03.024, PP. 393-397

Keywords: 猪圆环病毒2型,Cap蛋白,原核表达

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Abstract:

利用pCold-SUMO可溶性原核表达载体,构建表达猪圆环病毒2型缺失核定位信号肽的Cap基因的重组表达载体pCold-SUMO-dCap,并将其转入Arctic-Express表达菌株中15℃低温诱导表达.表达产物经SDS-PAGE分析,结果表明SUMO-dCap融合蛋白获得了高效表达,可溶性SUMO-dCap融合蛋白约占总融合蛋白的50%;用NI-NTA树脂纯化可溶性的融合蛋白,然后利用SUMO蛋白酶特异性去除SUMO标签,从而得到不含任何标签的dCap蛋白,进一步的Western-blot分析表明,表达的dCap蛋白具有良好的反应原性.

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