一株表达延胡索酸水合酶的基因工程菌的构建
The Construction of an E.coli Strain with Expression of Fumarate Hydratase
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摘要: 应用ＰＣＲ技术从大肠杆菌染色体ＤＮＡ中扩增出了长约１．８ｋｂ的ｆｕｍＡ基因片段，将其插入到ｐＵＣ１９载体中，转化大肠杆菌ＪＭ１０５，最后筛选出一株延胡索酸水合酶高产菌，命名为ＣＰＵ－Ｗ－９２１１，该菌的延胡索酸水合酶活力比ＪＭ１０５提高约６倍。从ＣＰＵ－Ｗ－９２１１里提取的质粒ｐＵＦ５２作为ＰＣＲ扩增的模板，以合成的ｆｕｍＡ基因两侧各长２４个核苷酸的片段为引物，可以扩增出１．８ｋｂ的ｆｕｍＡ片段；用限制性内切酶也可以从ｐＵＦ５２中切出一个接近１．８ｋｂ的插入片段。Abstract: An 1.8 kb fumA fragment,amplified out from E.coli chromosome DNA by PCR technology,was inserted into plasmid pUC19.The recombinant plasmid was used to transform E.coli JM105.From the transformants,a strain, named CPU-W-9211 was obtained,whose activity of
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