啤酒酵母鲨烯合酶基因的克隆及其基因表达载体的构建

目的] 克隆啤酒酵母鲨烯合酶基因及构建其基因表达载体,为在微生物体内重建青蒿素合成途径打下基础.方法]采用聚合酶链反应(PCR)扩增、扩增片段与T-载体连接和克隆片段的序列分析;酶切并回收目的基因,反向插入酵母表达载体pGAPZαA,双酶切鉴定重组子.结果] 通过PCR扩增获得1 335 bp片段,克隆后经PCR和酶切反应进行了鉴定.初步测序结果与GenBank上已登录的酵母鲨烯合酶基因序列基本吻合,相差仅数个碱基对;将此片段反向插入酵母表达载体pGAPZαA,构建了反义酵母表达载体,并通过双酶切加以鉴定.结论] 成功克隆了啤酒酵母鲨烯合酶基因并进行了测序,同时构建了反义酵母表达载体.

Cloning of Squalene Synthase Gene from Saccharomyces cerevisiae and Construction of Yeast Expression Vector

Objective To lay the foundation for studying the synthesis of artemisinin in microorganism,squalene synthase(SS) gene,a key enzyme gene from Saccharomyces cerevisiae,was cloned and a yeast expression vector was constructed.Methods After amplification of SS gene by polymerase chain reaction(PCR),ligation to T-vector and analysis of the cloned sequence,enzyme digestion and reconfirmation of the target gene,the antisense yeast expression vector was constructed by inverted insertion of the target gene into a ye...