吉林大学学报(医学版) ›› 2013, Vol. 39 ›› Issue (3): 437-440.doi: 10.7694/jldxyxb20130303

• 基础研究 • 上一篇    下一篇

人p21活化激酶6基因截短区域的GST标签原核表达质粒的构建及其重组蛋白的表达

刘彤,李洋,李丹妮*,耿楠希,李丰   


  1. (中国医科大学基础医学院细胞生物学教研室 教育部医学细胞生物学重点实验室,辽宁 沈阳 110001)
  • 收稿日期:2013-03-12 出版日期:2013-05-28 发布日期:2013-05-28
  • 通讯作者: 李 丰 E-mail:(Tel: 024-23261056,E-mail:fli@mail.cmu.edu.cn)
  • 作者简介:刘 彤(1980-),女,辽宁省沈阳市人,讲师,医学博士,主要从事肿瘤信号转导方面的研究。
  • 基金资助:

    国家自然科学基金资助课题(31171360)

Construction of GST-tagged prokaryotic expression plasmids of human PAK6 gene and expressions of their recombinant proteins

LIU Tong,LI Yang,LI Dan-ni*,GENG Nan-xi,LI Feng   

  1.  (Department of Cell Biology,School of Basic Science,Key Laboratory of Medical Cell Biology,Ministry of Education,China Medical University,Shenyang 110001,China)
  • Received:2013-03-12 Online:2013-05-28 Published:2013-05-28

摘要: 目的:构建人p21活化激酶6(PAK6)的各个截短区域原核表达质粒,并诱导和鉴定其融合蛋白的表达,为探讨PAK6基因的生物学功能提供依据。方法:以真核表达质粒pcDNA3.1-GFP-PAK6 为模板,PCR扩增出 PAK6基因的各个截短片段。所获得的各截短片段经EcoRⅠ/XhoⅠ双酶切后克隆至GST标签的原核表达载体pGEX-5X-1中。将构建的PAK6各截短质粒转化入E.coli  BL21中,采用IPTG诱导PAK6基因截短融合蛋白表达, 采用Western blotting 法鉴定PAK6基因截短融合蛋白的表达。结果:EcoRⅠ/XhoⅠ双酶切后得到与预期大小相符的载体片段(5 000 bp)和PAK6 1-55(165 bp)、PAK6 56-210(465 bp)、PAK6 211-410(600 bp)及PAK6 385-681(891 bp) 4个片段。Western blotting检测, PAK6各截短区域质粒GST-PAK6截短融合蛋白相对分子质量分别为32 000、43 000、48 000和60 000。结论:成功构建PAK6基因各个截短区域GST标签原核表达质粒并表达其重组蛋白。

关键词: P21活化激酶, 截短区域, 原核表达质粒, GST融合蛋白

Abstract: Abstract:Objective
To construct the prokaryotic expression plasmids of   truncated regions of human  p21-activated kinase 6(PAK6) to induce and identify their recombinant proteins,and to provide basis for discussing the biological function of PAK6 gene.Methods The eukaryotic expression plasmid pcDNA3.1-GFP-PAK6  was used as the template,and the truncated segments  of PAK6 gene were amplified by PCR method. The truncated segments were cloned into GST-tagged prokaryotic expression vector pGEX-5X-1 after do uble enzyme digestion of  EcoRⅠ/XhoⅠ.The truncated plasmids were transfect
ed into E.coli BL21 and the  PAK6 gene truncated fusion proteins were induced by IPTG and verified by Western blotting method.Results The vector fragment (5 000 bp) and PAK6 1-55(165 bp),PAK6 56-210(465 bp),PAK6 211-410(600 bp),and PAK6 385-681(891 bp)  vector fragments being consistent with the expected fragments were obtained after  double enzyme digestion of EcoRⅠ/XhoⅠ.The Western blotting  results showed that the relative molecular mass of GST-PAK6 truncated fusion proteins of PAK6 truncated region plasmids were 32 000,43 000,48 000,and 60 000,respectively.
Conclusion GST-tagged prokaryotic expression plasmids of different truncated regions of  PAK6 gene are constructed and their recombinant proteins are expressed successfully.

Key words: p21-activated kinase 6, truncated region, prokaryotic expression plasmid, GST fusion protein

中图分类号: 

  • R736