食品科学 ›› 2007, Vol. 28 ›› Issue (5): 199-202.

• 生物工程 • 上一篇    下一篇

纳豆激酶基因的克隆及其在大肠杆菌和枯草芽孢杆菌中的表达

 黄磊, 谢玉娟, 李申, 李丹, 梁凤来, 刘如林   

  1. 南开大学生命科学学院; 南开大学生命科学学院 天津300071; 天津300071;
  • 出版日期:2007-05-15 发布日期:2011-12-31

Molecular Clone and Expression of Nattokinase Gene in Escherichia coli and Bacillus subtilis

 HUANG  Lei, XIE  Yu-Juan, LI  Shen, LI  Dan, LIANG  Feng-Lai, LIU  Ru-Lin   

  1. School of Life Science,Nankai University,Tianjin 300071,China
  • Online:2007-05-15 Published:2011-12-31

摘要: 以纳豆芽孢杆菌HL-1全基因组DNA为模板,PCR分别扩增编码信号肽、前导肽及成熟肽的前纳豆激酶原基因序列(pre-pro-NK),编码前导肽、成熟肽的纳豆激酶原基因序列(pro-NK)和只编码成熟肽的纳豆激酶基因序列(NK),构建了大肠杆菌表达质粒pET28a-NK表达前纳豆激酶原基因及大肠杆菌-枯草杆菌穿梭质粒pHT315-NK表达纳豆激酶原基因和纳豆激酶基因,实现了纳豆激酶基因在大肠杆菌及枯草芽孢杆菌中的表达,并进行了活性分析。

关键词: 纳豆激酶基因, 大肠杆菌, 枯草芽孢杆菌, 表达

Abstract: Chromosome DNA was isolated from Bacillus subtilis(natto.var).Pre-pro-nk(encoding signal peptide,propeptide and mature peptide),pro-nk(encoding propeptide and mature peptide)and nk(encoding mature peptide)were then amplified from chromosome by PCR.The expression vector pET28a-nk and pHT315-nk was constructed and transformed into Escheri- chia coli and Bacillus subtilis to actively express nattokinase and be purified through ion-exchange chromatography.

Key words: nattokinase gene, Escherichia coli, Bacillus subtilis, active expression