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烟夜蛾幼虫中肠类钙粘蛋白基因cDNA片段的克隆与序列分析 被引量:1

cDNA Fragment Clone and Sequence Analysis of Cadherin-like Protein Gene in Tobacco Budworm(Helicoverpa assulta Guenée)
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摘要 类钙粘蛋白位于昆虫中肠刷状缘膜囊泡上,该蛋白作为Bt毒素的受体可以与其结合导致昆虫死亡,因此,昆虫对Bt毒素的抗性与类钙粘蛋白有密切关系。本研究以烟夜蛾五龄幼虫中肠的总RNA为模板,根据已经克隆的其他昆虫的类钙粘蛋白基因序列设计引物,利用RT-PCR技术扩增出了烟夜蛾类钙粘蛋白基因的cDNA片段,将其连接到pMD18-T载体,转化大肠杆菌后筛选阳性克隆并进行序列测定,测序得到的1 335 bp的片断编码444个氨基酸残基。序列分析表明,该氨基酸序列与棉铃虫和烟芽夜蛾类钙粘蛋白的一致性分别为95%和86%。研究结果对进一步研究昆虫对Bt毒素产生抗性的机制以及发展分子技术快速检测并监测田间昆虫抗性基因的产生奠定了基础。 Cadherin-like protein acts as a receptor of Bt toxin by binding with toxin in brush border membrane of insect. Insect resistance to Bt toxin is related with the variation of cadhefin-like protein gene. eDNA fragment of cadhefinlike protein gene in the fifth instar larva of oriental tobacco budworm was amplified using degeneracy primers and RT-PCR technique, and the target fragment was further sequenced after being cloned into pMD18-T vector plasmid. The sequence quence were 95 % and 86 %, respectively.
出处 《华北农学报》 CSCD 北大核心 2007年第1期152-155,共4页 Acta Agriculturae Boreali-Sinica
基金 河南农业大学博士基金
关键词 烟夜蛾 类钙粘蛋白 基因克隆 序列分析 Helicoverpa assulta Guenee Cadherin-like protein Gene cloning Sequence analysis
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参考文献14

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