中国媒介生物学及控制杂志

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苏云金芽孢杆菌杀蚊蛋白基因cry11 Aa的克隆与表达

孙建光1,3;高俊莲2,3;Soberon Mario3   

  1. 1中国农业科学院农业资源与农业区划研究所微生物资源与利用研究室 北京100081;2北京市农林科学院北京农业生物技术研究中心;3Institutode Biotecnologia Universidad Nacional Autonomade Mexico;Cuernavaca62250;Mexico
  • 出版日期:2006-08-20 发布日期:2006-08-20

Clone and Expression of Mosquitocidal Toxin Gene cry11Aa of Bacillus thuringiensis

SUN Jian-guang*; GAO Jun-lian; Soberon Mario   

  1. Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Online:2006-08-20 Published:2006-08-20

摘要: 目的 克隆苏云金芽孢杆菌以色列亚种的杀蚊毒素蛋白基因cry11Aa,并使其在酵母双杂交系统受体菌Saccharomyces cerevisiaeL40中获得表达。方法 应用聚合酶链反应扩增获得cry11Aa基因,构建表达载体pHybLex/Zeo-cry11Aa,转化到酵母菌Saccharomyces cerevisiaeL40。结果 用Cry11Aa抗体和LexA抗体进行的Western blot免疫杂交表明cry11Aa基因在酵母菌L40中成功表达,生成了Cry11Aa-LexA融合蛋白。结论 成功地克隆、表达了cry11Aa基因,为进一步利用酵母双杂交系统寻找与毒素蛋白Cry11Aa特异性结合的蚊幼中肠受体蛋白,揭示苏云金芽孢杆菌毒杀蚊虫的分子生物学机制奠定了基础。

关键词: 苏云金芽孢杆菌, cry11Aa基因, 杀蚊毒素蛋白, 克隆, 表达

Abstract: Objective Clone of the mosquitocidal toxin gene cry11Aa from Bacillus thuringiensis subsp.israelensi and expression of this gene in the Yeast Two-Hybrid System Saccharomyces cerevisiae L40. Methods Gene cry11Aa was produced by PCR amplification. Expression vector pHybLex/Zeo-cry11Aa was constructed and transferred into Saccharomyces cerevisiae L40. Results Western blotting with Cry11Aa and LexA antibodies showed that gene cry11Aa was expressed in Saccharomyces cerevisiae L40 and a Cry11Aa-LexA fusion protein was produced. Conclusion Gene cry11Aa was successfully cloned and expressed. This work lay a foundation for searching the receptor in mosquito larvae midgut which can interact with Cry11Aa and knowing more about the molecular biological mosquitocidal mechanism of Bacillus thuringiensis subsp. israelensis.