吉林大学学报(理学版)

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嗜热菌Thermaerobacter subterraneus DSM13965磷酸三酯酶的原核表达、 ]纯化及性质表征

林禹欣1, 刘惠麟1,  韩葳葳2, 詹冬玲1, 刘景圣1   

  1. 1. 吉林农业大学 食品科学与工程学院, 长春 130118;2. 吉林大学 分子酶学工程教育部重点实验室, 长春 130012
  • 收稿日期:2013-02-18 出版日期:2013-11-26 发布日期:2013-11-21
  • 通讯作者: 刘景圣,詹冬玲 E-mail:liujs1007@vip.sina.com.cn; zdlgale@126.com

Prokaryotic Expression, Purification and Properties of Phosphotriesterase from Thermophilic Archaeon Thermaerobacter subterraneus DSM13965

LIN Yuxin1, LIU Huilin1, HAN Weiwei2, ZHAN Dongling1, LIU Jingsheng1   

  1. 1. College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China; 2. Key Laboratoryfor Molecular Enzymology and Engineering of the Ministry of Education, Jilin University, Changchun 130012, China
  • Received:2013-02-18 Online:2013-11-26 Published:2013-11-21
  • Contact: LIU Jingsheng,ZHAN Dongling E-mail:liujs1007@vip.sina.com.cn; zdlgale@126.com

摘要:

将来源于嗜热菌Thermaerobacter subterraneus DSM13965的磷酸三酯酶基因在大肠杆菌BL21中高效表达, 并采用超声、 热失活和组氨酸标签
镍柱对产物进行分离纯化, 通过SDSPAGE和Westernblot对表达产物进行鉴定. 结果表明: 该重组酶以二聚体的寡聚体形式存在; 其最适温度为70 ℃, 最适pH=10.0, 具有良好的热稳定性.

关键词: 嗜热菌Thermaerobacter subterraneus DSM13965, 磷酸三酯酶, 原核表达, 性质

Abstract:

Gene phosphotriesterase from archeaon Thermaerobacter subterraneus DSM13965 was cloned and expressed at high levels in E.coli BL21. The recombinant enzyme was purified to homogeneity via ultrasonic, heating and histag in Nisepharose chromatography. With the help of SDSPAGE and Westernblotting, the phosphotriesterase was identified as a homooligomer existed in dimer form. The enzyme was characterized with ethylparaoxon, its optimum temperature and pH were 70 ℃ and 10.0, respectively. The enzyme has a favourable heat resistance.

Key words: Thermaerobacter subterraneus DSM13965, phosphotriesterase, prokaryotic expression, property

中图分类号: 

  • Q786