生物技术通报 ›› 2014, Vol. 0 ›› Issue (7): 173-178.

• 研究报告 • 上一篇    下一篇

EB病毒融合蛋白Zta-P54在大肠杆菌中的表达、纯化及鉴定

王云龙1, 3, 张春艳1, 李玉林3, 程蕾3, 王继创3, 邓黎黎2, 米海3, 白晓静2   

  1. 1.郑州大学生物工程系, 郑州 450001;
    2.郑州职业技术学院, 郑州450046;
    3.河南省生物工程技术研究中心, 郑州 450001
  • 收稿日期:2013-12-24 出版日期:2014-07-15 发布日期:2014-07-16
  • 作者简介:王云龙, 男, 教授, 研究方向:生物制药;E-mail:biowyl@126.com
  • 基金资助:
    河南科技攻关资助项目(132201310001)

Expression, Purification and Identification of Zta-P54 Fusion Protein in Escherichia coli of Epstein-Barr Virus

Wang Yunlong1, 3, Zhang Chunyan1, Li Yulin3, Cheng Lei3, Wang Jichuang3, Deng Lili2, Mi Hai3, Bai Xiaojing2   

  1. 1. Bioengineering Department, Zhengzhou University, Zhengzhou 450001;2. Zhengzhou Technical College, Zhengzhou 450046;3. Henan Biotechnology Research Center, Zhengzhou 450001
  • Received:2013-12-24 Published:2014-07-15 Online:2014-07-16

摘要: 为获得能用于检测试剂盒的高纯度具有活性的EB病毒融合蛋白, 以pGEX5T-BZLF1-BMRF1质粒为模板进行PCR扩增得到BZLF1-BMRF1融合基因, 将其插入pET32a中, 构建表达质粒pET32a/BZLF1-BMRF1。将该质粒转入大肠杆菌培养, 经IPTG诱导获得Zta-P54融合蛋白。用DEAE-Sepharose CL-6B和Ni-NTA亲和层析纯化, 并通过SDS-PAGE和Western blot对Zta-P54融合蛋白进行鉴定。双酶切鉴定和测序结果显示成功构建pET32a/BZLF1-BMRF1质粒, SDS-PAGE显示该蛋白相对分子量约为60 kD, 与预期结果一致。纯化后获得纯度为96.5 %的Zta-P54融合蛋白。Western blot检测该蛋白有良好的生物活性和反应特异性。因此, 成功构建pET32a/BZLF1-BMRF1质粒, 在大肠杆菌中可溶性表达。最终获得纯度高、生物活性好的融合蛋白。

关键词: EB病毒, Zta-P54融合蛋白, 原核表达, 蛋白纯化

Abstract: It was to obtain high purity and active epstein-barr virus fusion protein and use for detection kit. The fragments of BZLF1-BMRF1 amplified by PCR from pGEX5T-BZLF1-BMRF1 was inserted into expression vector pET32a, and the recombinant plasmid pET32a-BZLF1-BMRF1 was transformed into E. coli, which was induced to express by IPTG. The expression protein Zta-P54 was purificated by DEAE Sepharose CL-6 B and Ni -NTA affinity chromatography then analysed by SDS-PAGE and immunoreactivity was proved by western blotting.Double endonuclease digestion and DNA sequencing results showed that sequencing results constructed successfully. SDS-PAGE showed that the protein was soluble expressing. The expression product Zta-P54 with the moleculor weight 60 kD was located in the cytoplasm and soluble.Expression Protein, s purity was 96.5%. Western blotting showed that frusion protein Zta-P54 possessed a well bioactivity and specificity.Therefore, It proved that the pET32a/BZLF1-BMRF1 plasmid can effectively express in E. coli.

Key words: EB virus, Zta-P54 fusion protein, Prokaryotic expression, Protein purification