J4 ›› 2012, Vol. 38 ›› Issue (2): 202-206.

• 基础研究 • 上一篇    下一篇

Smad2/3/4真核表达质粒的构建及重组蛋白表达

张红艳1|王春玉1|姚远2|李彦姝1|王迪1|李丰1   

  1. 1.中国医科大学细胞生物学教研室 卫生部细胞生物学重点实验室 教育部医学细胞生物学重点实验室 辽宁 沈阳 110001;2.辽宁省人民医院消化内科|辽宁 沈阳 110016)
  • 收稿日期:2011-12-01 出版日期:2012-03-28 发布日期:2012-03-28
  • 通讯作者: 李丰 E-mail:(Tel:024-23256666-5347,E-mail:fli@mail.cmu.edu.cn)
  • 作者简介:张红艳(1981-)|女|内蒙古自治区通辽市人|实验师|医学硕士|主要从事肿瘤信号转导通路的研究。
  • 基金资助:

    国家自然科学基金资助课题(31171360,30900752,30800415);教育部博士点基金资助课题(20102104110016)

Construction of |recombinant plasmid pcDNA3.1myc-HisA-Smad2/3/4  and its protein expression

ZHANG Hong-yan1,WANG Chun-yu1,YAO Yuan2,LI Yan-shu1,WANG Di1,LI Feng1   

  1. (1.Department of Cell Biology,Key Laboratory of Cell Biology,Ministry of Public Health,Key Laboratory of Cell Biology,Ministry of Education,China Medical University,Shenyang 110001,China;2. Department of Gastroenterology|People’s Hospital of Liaoning Province,Shenyang 110016,China)
  • Received:2011-12-01 Online:2012-03-28 Published:2012-03-28

摘要:

目的:构建pcDNA3.1myc-HisA-Smad2/3/4真核表达质粒,证实融合蛋白在细胞内表达。方法:以pcDNA3.1-Smad2/3和pGEX2T-Smad4质粒为模板,设计特异性引物,PCR扩增Smad2/3/4全长编码基因,亚克隆至含有pcDNA3.1myc-HisA 标签的真核表达载体中。将构建的重组质粒测序并转染到人胚胎肾细胞HEK293 中,提取细胞蛋白进行 Western blotting 检测。结果:Smad2/3/4 全长基因序列克隆到真核表达载体pcDNA3.1myc-HisA中,酶切鉴定片段为1 401、1 275和1 656 bp。Western blotting检测到融合蛋白pcDNA3.1myc-HisA- Smad2/3/4的表达。结论:成功构建pcDNA3.1myc-HisA-Smad2/3/4真核表达质粒,同时鉴定其融合蛋白的表达。

关键词: Smad;蛋白免疫印记;融合蛋白

Abstract:

To construct the expression plasmid of pcDNA3.1myc-HisA-Smad2/3/4 and identify its fusion  protein expression.Methods pcDNA3.1- Smad2/3 and pGEX2T-Smad4 were used as templates,and the special primers were designed.The Smad2/3/4 coding sequence was amplified by polymerase chain reaction (PCR) method and subcloned into pcDNA3.1myc-HisA vector. After the target region was sequenced,the plasmid was transfected into HEK293 cell line. The expression of the recombinant plasmid in HEK293 cells was detected by Western blotting.Results Smad2/3/4 was constructed into expression vector pcDNA3.1myc-HisA successfully.The lengthes of the fragments were 1 401,1 275 and 1 656 bp,and they were identified by restriction enzymes digestion.The expression of pcDNA3.1myc-HisA-Smad2/3/4 fusion protein was proved by Western blotting.Conclusion The eukaryotic expression plasmid  pcDNA3.1myc-HisA-Smad2/3/4 is successfully constructed,and the expression of pcDNA3.1myc-HisA-Smad2/3/4 fusion protein is identified.

Key words: Smad;Western blotting;fusion protein

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