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弓形虫致密颗粒蛋白GRA7的全基因原核重组表达

, PP. 1045-1048

Keywords: 刚地弓形虫,致密颗粒蛋白GRA7,反转录基因克隆,原核重组表达

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Abstract:

目的克隆弓形虫RH株致密颗粒蛋白7(GRA7)的全长基因,在大肠杆菌工程菌中重组表达GST-His-GRA7融合蛋白。方法提取弓形虫总RNA,反转录获得cDNA,PCR扩增GRA7基因全长,与pET-41Ek/LIC载体通过基因重组直接连接,在大肠杆菌RosettaTM(DE3)pLysS工程菌中诱导表达重组融合蛋白,最后采用SDS-PAGE和Westernblotting鉴定重组蛋白产物。结果构建了弓形虫GRA7全基因的重组表达质粒,诱导表达了GST-His-GRA7融合重组蛋白,分子量为62kD,与预测结果相符。结论研究获得了弓形虫GRA7全基因的重组蛋白,为进一步研究弓形虫GRA7抗原性及其与宿主细胞的相互作用奠定了基础。

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