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结核分枝杆菌Mtb81蛋白的表达及应用研究

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Keywords: 结核分枝杆菌,Mtb81,克隆,表达

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Abstract:

目的克隆结核分枝杆菌Mtb81蛋白的编码基因Rv1837c,并在大肠杆菌中表达、纯化,获得重组蛋白Mtb81。方法以结核分枝杆菌H37Rv基因组为模板,PCR扩增Rv1837c基因序列,克隆入原核表达载体pET-28a,构建重组表达质粒,转化大肠杆菌后用IPTG诱导表达,纯化表达产物,获得重组Mtb81。ELISA检测重组Mtb81蛋白的敏感性和特异性。结果重组质粒pETRv1837c测序表明具有正确的编码序列,质粒构建成功,重组蛋白Mtb81在大肠杆菌中以包涵体和可溶性形式稳定表达。以Mtb81为抗原ELISA检测结核病患者血清抗体总敏感性为20.83%,特异性为95.83%。结论结核分枝杆菌Mtb81重组蛋白能在大肠杆菌工程菌种成功表达,为进一步的应用研究奠定基础。

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