›› 2001, Vol. 44 ›› Issue (2): 155-160.

• 研究论文 • 上一篇    下一篇

粉纹夜蛾颗粒体病毒增效基因3'端2.5 kb片段在大肠杆菌中的表达

袁哲明1*, 孟小林2**, 刘树生1   

  • 出版日期:2001-05-20 发布日期:2001-05-20

Cloning and expression of 2.5 kb enhancin gene from Trichoplusia nigranulosis virus in Escherichia coli

YUAN Zhe-ming1, MENG Xiao-lin2*, LIU Shu-sheng1   

  • Online:2001-05-20 Published:2001-05-20

摘要: 将粉纹夜蛾Trichoplusia ni颗粒体病毒增效基因3'端2.5 kb片段插入pQE-31中构建了重组表达载体pQE/enhancin,转化大肠杆菌M15(pREP4)在IPTG诱导下成功表达出分子量约为96 kD的融合蛋白并命名为P96。初步纯化的P96显示了明显的增效活性,可提高棉铃虫核型多角体病毒对棉铃虫3龄幼虫感染死亡率27.40%~34.50%,缩短LT50 1.9天以上。

关键词: 粉纹夜蛾颗粒体病毒, 增效基因, 克隆, 表达, 生物测定

Abstract: The 2.5 kb fragment of enhancin gene in 3' terminal from Trichoplusia ni granulosis virus was inserted into vector pQE-31 and expressed successfully in Escherichia coli M15 (pREP4). The synergy of the expression product (P96) on Helicoverpa armigera nuclear polyhedrosis virus (HaNPV) against the 3rd instar larvae of H. armigera was also studied. The results indicated that the percentage of accumulated mortality of the larvae increased by 27.40%~34.50% on the 11th day postinfection and the median lethal time decreased at least by 1.9 days in HaNPV+P96 treated compared with those in HaNPV treated.

Key words: Trichoplusia ni granulosis virus, enhancin gene, cloning, expression, bioassay