中国畜牧兽医

• 生物技术 • 上一篇    下一篇

鸡干扰素-α基因原核表达载体的构建及高效表达

刘成倩1,王静1,2,李红1,于宗幸1,2,易建中1,陈磊1,2   

  1. (1.上海市农业科学院畜牧兽医研究所,上海 201106;2.上海海洋大学水产与生命学院,上海 201106)
  • 出版日期:2014-04-20 发布日期:2014-05-27
  • 通讯作者: 易建中,研究员。E-mail:yijianzhong@yahoo.com

Construction and High Level Expression of Prokaryotic Expression Vector of Chicken Interferon-α Gene

LIU Cheng-qian1, WANG Jing1,2, LI Hong1, YU Zong-xing 1,2, YI Jian-zhong1, CHEN Lei1,2   

  1. (1. Animal Husbandry and Veterinary Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201106, China; 2. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201106, China)
  • Online:2014-04-20 Published:2014-05-27

摘要: 干扰素(IFN)-α因其具有很强的抗病毒活性而备受关注。本研究根据GenBank上公布的鸡IFN-α核酸序列设计1对引物,用PCR方法扩增出鸡IFN-α基因,并将其克隆到原核表达载体pET-32a及pET-30a-DsbA上,得到重组质粒pET-32a-IFN-α及pET-30a-DsbA-IFN-α。将重组质粒转化大肠杆菌Transetta(DE3)感受态细胞,经SDS-PAGE电泳及Western blotting分析,结果表明pET-30a-DsbA-IFN-α表达量较高,表达的融合蛋白分子质量约40.4 ku,表达产物主要以包涵体形式存在,且表达的融合蛋白能与His标签单克隆抗体发生特异性反应。

关键词: 鸡;干扰素-α ;原核表达

Abstract: Interferon (IFN)-α had received much more attention for its comprehensive antiviral activity. According to the relevant sequence from GenBank, a pair of specific primers was designed for amplifying chicken IFN-α gene with PCR method. The IFN-α gene was cloned into prokaryotic expression vector pET-32a and pET-30a-DsbA and the protein’s expression was identified by SDS-PAGE. Immunity characteristic of the protein was analyzed by Western blotting. The cloned pET-30a-DsbA-IFN-α/E.coli was found to produce a 40.4 ku protein at the high level. The expression products existed mainly in the form of inclusion body. These expression products could specificly react with His-tag monoclonal antibody.

Key words: chicken; interferon-α; prokaryotic expression