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粟弯孢霉叶斑病菌G蛋白β亚基基因克隆及表达

DOI: 10.7668/hbnxb.2014.04.002, PP. 7-12

Keywords: 粟弯孢病菌,G蛋白β亚基,qRT-PCR,原核表达

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Abstract:

旨在获得粟弯孢霉叶斑病菌G蛋白β亚基基因,明确其表达模式,为阐明该基因对粟弯孢霉叶斑病菌致病性的调控机制奠定基础。运用SMARTRACERT-PCR技术,克隆粟弯孢霉叶斑病菌G蛋白β亚基基因ClGβ全长cDNA序列,以qRT-PCR技术,对该基因在粟弯孢霉叶斑病菌不同生长时间的表达特征进行分析。结果表明,ClGβ基因cDNA编码区为1056bp,DNA包含4个内含子和5个外显子,编码351个氨基酸。该基因的cDNA序列在GenBank中注册的登录号为JQ768316。qRT-PCR结果表明,Gβ基因在菌株生长过程中表现出前期表达量较低而后期表达量明显升高的趋势。构建了pET28(a)-ClGβ原核表达载体,经IPTG诱导,目的蛋白在宿主菌E.coliBL21中获得表达,表达产物分子量与ClGβ蛋白计算分子量一致。

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