摘要目的 构建结核分枝杆菌(MTB)早期分泌蛋白CFP-10原核表达载体并进行诱导表达.方法 通过PCR技术从结核分枝杆菌H37 Rv基因组中扩增出lhp基因片段,目的基因片段克隆至表达载体pET-32a(+),构建pET-32a-CFP-10重组表达质粒,将其转化E.coli BL21(DE3),经IPTG诱导表达.结果 成功地构建原核表达载体pET-32a-CFP-10,以重组体转化E.coli BL21(DE3),成功进行诱导表达.结论 成功构建CFP10的原核表达质粒,高效表达目的蛋白CFP-10,为进一步研究其免疫学功能奠定了基础.

abstractsObjective To construct recombinant plasmid containing CFP-10 gene of Mycobacterium tuberculosis(MTB).Methods The gene fragment of CFP-10 was amplified by PCR from Mycobacterium tuberculosis H37Rv genomic DNA and cloned to pET-32a(+) vector.The recombinant plasmid pET-32a-CFP-10 was transformed into E.coli BL21 (DE3) and induced by IPTG.Results CFP-10 gene fragment was amplified from genomic DNA of Mycobacterium tuberculosis H37Rv strain,and thepET-32a(+) prokaryotic recombinant plasmid was constructed successfully.The recombinant protein was expressed with the induction of IPTG.Conclusions The prokaryotic expression vector for CFP-10 was successfully constructed and the recombinant protein was highly expressed in E.coli BL21 (DE3),which lays a foundation for its subsequent immunological function study.