›› 2002, Vol. 45 ›› Issue (6): 840-843.

• 研究论文 • 上一篇    下一篇

棉铃虫卵内半胱氨酸蛋白酶的分离纯化、氨基酸序列分析及蛋白酶鉴定

张志宏, 赵小凡, 王金星   

  • 出版日期:2002-12-20 发布日期:2002-12-20

Purification, partial amino acid sequencing and identification of a cysteine proteinase in eggs of the cotton bollworm, Helicoverpa armigera

ZHANG Zhi-Hong, ZHAO Xiao-Fan*, WANG Jin-Xing   

  • Online:2002-12-20 Published:2002-12-20

摘要: 采用阴离子交换层析法,从棉铃虫Helicoverpa armigera卵母细胞中分离纯化到一种半胱氨酸蛋白酶,SDS-PAGE电泳显示为一条带,分子量约为29 kD,原位水解电泳表明其具有蛋白水解活性。对其进行了部分氨基酸序列测定,初步确定这种蛋白酶属于半胱氨酸蛋白酶类中的组织蛋白酶B类。

关键词: 棉铃虫, 半胱氨酸蛋白酶, 分离纯化, 氨基酸序列, 鉴定

Abstract: A cysteine proteinase from cotton bollworm eggs was purified by anion-exchange chromatography based on previous work. The proteinase gave a single band after SDS-PAGE. The molecular mass of the purified proteinase was estimated to be 29 kD, which showed proteolytic activity in an in situ hydrolysis experiment. A partial amino acid sequence was compared with that of other typical proteinases. Similarities were appreciable between the composition of the egg proteinase and cysteine proteinases, particularly cathepsin B.

Key words: Helicoverpa armigera, cysteinase proteinase, purification, amino acid sequence, identification