J4 ›› 2011, Vol. 37 ›› Issue (6): 1024-1027.

• 基础研究 • 上一篇    下一篇

GFP-SUMO-3融合蛋白的重组及其在LNCaP细胞中的表达和定位

伍贤军|缪璇|程秀|王妍青|辻一郎|李晓萌   

  1. 1.东北师范大学生命科学学院遗传与细胞研究所| 吉林 长春 130024;2.日本东北大学医学部公共卫生学院 |日本 仙台 980-8575
  • 收稿日期:2011-06-29 出版日期:2011-11-28 发布日期:2011-11-28
  • 通讯作者: 李晓萌 (Tel: 0431-85099285,E-mail:lixm441@nenu.edu.cn) E-mail:lixm441@nenu.edu.cn
  • 作者简介:伍贤军(1988-)|男|重庆市开县人|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(30871301,30700827);科技部国际合作项目资助课题(2010DFA31430);国家高校基本科研业务费专项基金资助课题(09SSXT035,10SSXT147,10JCXK004);吉林省科技厅科研基金资助课题(20080731,200905116);国家大学生创新性实验计划项目资助课题(101020031)

Recombination of GFP-SUMO-3 fusion protein and its expression and localization in LNCaP cells

WU Xian-jun,MIAO Xuan,CHENG Xiu,WANG Yan-qing,TSUJI Ichiro,LI Xiao-meng   

  1. 1.Institute of Genetics and Cytology,  |School of Life Sciences,Northeast Normal University,Changchun 130024,China;2. Department of Public Health,Tohoku University,Sendai 980-8575,Japan
  • Received:2011-06-29 Online:2011-11-28 Published:2011-11-28

摘要:

目的:构建以绿色荧光蛋白(GFP)为报告基因的重组真核表达载体pEGFP-N1-SUMO-3,观察GFP-SUMO-3融合蛋白在人前列腺癌细胞LNCaP中的表达与定位。方法:采用PCR扩增SUMO-3基因全长cDNA编码区序列,克隆入pEGFP-N1真核表达载体。重组质粒pEGFP-N1-SUMO-3通过酶切和测序鉴定正确后,脂质体法将重组质粒转染至LNCaP中,利用GFP抗体通过Western blotting检测 GFP-SUMO-3融合蛋白的表达,通过荧光显微镜观察其在细胞中的表达及分布。结果:重组质粒pEGFP-N1-SUMO-3经BamHⅠ和Xho Ⅰ双酶切鉴定,得到大小分别为4 700和312 bp的条带,与预期结果一致。测序结果显示,GFP在N端,是阅读框正确的SUMO-3的基因序列。在LNCaP细胞中过表达GFP-SUMO-3融合蛋白,Western blotting得到相对分子质量为39 000的蛋白表达条带,与GFP-SUMO-3大小相符。荧光显微镜观察,转染重组质粒pEGFP-N1-SUMO-3 的细胞中呈绿色荧光,主要在细胞核内表达,与DAPI重合。结论:成功构建重组质粒pEGFP-N1-SUMO-3,并表达代绿色荧光蛋白的SUMO-3融合蛋白,鉴定出SUMO-3在LNCaP细胞中的核定位性。

关键词: GFP-SUMO-3融合蛋白;重组蛋白质类;LNCaP细胞;基因表达

Abstract:

Abstract:Objective To construct the fusion gene eukaryotic expression vector pEGFP-N1-SUMO-3,and to study the expression and localization of GFP-SUMO-3 fusion protein in human prostate cancer cell line LNCaP.Methods The encoding region of SUMO-3 was obtained by PCR,and cloned into eukaryotic expression vector pEGFP-N1.Then the pEGFP-N1-SUMO-3 plasmid was transfected into LNCaP cells by liposome.The expression of the fusion protein was detected by Western blotting,and the subcellular localization  was observed by fluorescence microscope.Results The recombinant plasmid  pEGFP-N1-SUMO-3 was identified by BamHⅠ and XhoⅠ double digestion.As expected,it showed two bands of 4 700 and 312 bp.The recombinant plasmid also showed right sequence by the full length sequencing.The pEGFP-N1-SUMO-3 plasmid was transfected into prostate cancer LNCaP cells.A specific protein expression band at molecular weight of 39 000 was detected with  using GFP-antibody by Western blotting method.When observed by fluorescence micro
scope,the GFP-SUMO-3 fusion protein was mainly located in the nucleus of LNCaP cells.Conclusion The recombinant plasmid pEGFP-N1-SUMO-3 is successfully constructed,and GFP-SUMO-3 fusion protein is successfully expressed in mammalian cells and mainly located in the nucleus.

Key words: GFP-SUMO-3 fusion protein;recombinant protein;LNCaP cells;gene expression

中图分类号: 

  • Q78