›› 2011, Vol. 54 ›› Issue (7): 762-768.doi:

• 研究论文 • 上一篇    下一篇

斜纹夜蛾线粒体复合物ⅢFe-S蛋白基因克隆、序列分析及在不同发育阶段的表达特征

 陈永, 龚亮, 左洪亮, 钟国华   

  • 收稿日期:2010-12-19 出版日期:2011-07-20 发布日期:2011-07-20
  • 作者简介:陈永, 男, 1985年生, 硕士研究生, 研究方向为昆虫毒理与昆虫分子生物学, E-mail: 0209cy@163.com
  • 基金资助:

    教育部霍英东教育基金会高等院校青年教师基金资助项目(111027)

Cloning, sequence analysis and developmental expression profiling of the rieske ironsulfur protein of mitochondrial complex Ⅲ from the common cutworm, Spodoptera litura (Fab.) (Lepidoptera: Noctuidae)

CHEN Yong, GONG Liang, ZUO Hong-Liang, ZHONG Guo-Hua   

  • Received:2010-12-19 Online:2011-07-20 Published:2011-07-20
  • About author:0209cy@163.com

摘要: Fe-S蛋白(rieske iron-sulfur protein, RISP)是线粒体复合物Ⅲ的关键蛋白亚基之一, 在呼吸链电子传递中起着重要作用。本文利用RT-PCR技术和RACE方法获得了斜纹夜蛾Spodoptera litura (Fab.)线粒体复合物ⅢRISP基因, 该基因序列全长4 413 bp, 含有3个内含子; 开放阅读框长816 bp, 编码271个氨基酸。经氨基酸序列比对, 与鳞翅目家蚕Bombyx mori和小菜蛾Plutella xylostella的Fe-S蛋白一致性较高, 分别为83%和79%, 与其他目昆虫的RISP一致性较低。qRT-PCR分析结果表明, SlitRISP基因在斜纹夜蛾不同发育阶段的表达水平存在显著差异, 即幼虫期和成虫期的表达量显著高于卵期和蛹期, 其中幼虫期又以第4和5龄幼虫表达水平显著高于初孵幼虫以及第1, 2, 3和6龄幼虫。斜纹夜蛾SlitRISP基因的克隆成功为今后对其功能研究以及作为靶标设计新型高效杀虫剂提供了基础。

关键词: 斜纹夜蛾, Fe-S蛋白, 基因结构, 序列分析, 表达特征

Abstract: Rieske iron-sulfur protein (RISP) is one of key subunits in mitochondria complex Ⅲ that plays an important role in respiratory electron-transport chain. The full-length Spodoptera litura RISP cDNA (SlitRISP) of 4 413 bp was cloned and characterized by RT-PCR and RACE technique, which contains three introns. The open reading frame (ORF) of SlitRISP is 816 bp encoding 271 amino acid residues. The sequence analysis indicated that SlitRISP shares overall 83% and 79% amino acid sequence identity to the RISP sequences from Bombyx mori and Plutella xylostella, respectively. The qRT-PCR result revealed that the expression level of SlitRISP was significantly different in different stages of S. litura, which in larval and adult stages was significantly higher than that in egg and pupal stages, while the expression levels in 4th and 5th instars were clearly higher than that in the early instars and 6th instar. This study provides a foundation for understanding the SlitRISP function and its application as a new target for respiratory electron transport blocking agent in designing new and efficient insecticides.

Key words: Spodoptera litura, rieske iron-sulfur protein (RISP), gene structure, sequence analysis, expression profile