›› 2006, Vol. 49 ›› Issue (3): 363-366.

• 研究论文 • 上一篇    下一篇

棉铃虫酚氧化酶原基因的克隆、序列分析和组织表达

张小玉, 徐晓宇, 张俊彦, 王国秀, 刘绪生   

  1. 华中师范大学生命科学学院,武汉430079
  • 出版日期:2006-07-10 发布日期:2006-06-20

cDNA cloning, sequence analysis and tissue expression of a prophenoloxidase gene in Helicoverpa armigera

ZHANG Xiao-Yu , XU Xiao-Yu, ZHANG Jun-Yan,WANG Guo-Xiu,LIU Xu-Sheng   

  1. College of Life Sciences, Central China Normal University
  • Online:2006-07-10 Published:2006-06-20

摘要:

利用RT-PCR和RACE方法,获得了棉铃虫Helicoverpa armigera酚氧化酶原(prophenoloxidase,PPO)基因一个亚型cDNA的完整序列。该序列全长2 405 bp,含有一个2 097 bp的开放阅读框,编码一个由698个氨基酸残基组成的蛋白质。推导的氨基酸序列与其他鳞翅目昆虫PPO2基因相应氨基酸序列有较高的同源性(76%~80%),同时该序列具有铜离子结合位点等PPO基因所具有的典型特征。组织特异性表达分析表明,该基因在棉铃虫血细胞、体壁和中肠中均有表达。

关键词: 棉铃虫, 酚氧化酶原基因, 克隆, 序列分析, 组织表达

Abstract:

The cDNA of Helicoverpa armigera prophenoloxidase (PPO) was cloned by means of RT-PCR and RACE. The cDNA was 2 405 bp in length and contained an open reading frame (ORF) of 2 097 bp which encoded 698 amino acid residues. The deduced amino acid sequence showed a high identity to the reported sequence of PPO2 from other insects and shared the typical structural features of PPO from other insects. The results of RT-PCR showed that PPO mRNA was expressed in integument,haemocyte and midgut of H. armigera.
 

Key words: Helicoverpa armigera, prophenoloxidase gene, clone, sequence analysis, tissue expression