J4

• 基础研究 • 上一篇    下一篇

2GPⅠ第一功能区基因单体和二串联体的克隆和表达

李明辉, 谭 岩*,姜艳芳,刘力华,方艳秋,许淑芬,段秀梅,付 嘉   

  1. 吉林大学第一医院中心实验室,吉林 长春130021
  • 收稿日期:2005-10-17 修回日期:1900-01-01 出版日期:2006-03-28 发布日期:2006-03-28
  • 通讯作者: 谭 岩*

Cloning and expression of monomer and dimmerof hβ2GPⅠ first domain gene

LI Ming-hui, TAN Yan*,JIANG Yan-fang, LIU Li-hua, FANG Yan-qiu, XU Shu-fen, DUAN Xiu-mei,FU Jia   

  1. Department of Central Laboratory, First Hospital, Jilin University, Changchun 130021, China
  • Received:2005-10-17 Revised:1900-01-01 Online:2006-03-28 Published:2006-03-28
  • Contact: TAN Yan*

摘要: 目的:构建hβ2GPⅠ(hβ2GPⅠ)第一功能区基因单体及二串联体的原核表达载体PQE30-β2GPⅠ-DI和PQE30-β2GPⅠ-DI2,并在大肠杆菌M15中进行高效表达。方法:应用PCR技术扩增hβ2GPⅠ第一功能区基因的单体β2GPⅠ-DI,并根据同尾酶特性构建hβ2GPⅠ第一功能区基因二串联体β2GPⅠ-DI2,将获得的单体和二串联体分别与PGEM-T easy载体连接测序,测序正确后分别克隆于原核表达载体PQE30中,构建成重组表达载体PQE30-β2GPⅠ-DI和PQE30-β2GPⅠ-DI2,在大肠杆菌M15中以l mmol·L-1 IPTG诱导蛋白表达,经Western blotting鉴定目的蛋白的抗原性。结果:表达了hβ2GPⅠ第一功能区基因的单体及二串联体的蛋白,相对分子质量约为9 000和17 000,其表达量均可达菌体总蛋白的25%,并具有hβ2GPⅠ的抗原性。结论:成功构建了hβ2GPⅠ第一功能区基因的单体及二串联体的原核表达载体,并诱导了蛋白的高效表达。

关键词: sub>GPⅠ, 遗传载体, 基因表达

Abstract: Objective To clone and express the genes of hβ2GPⅠ-DI and hβ2GPⅠ-DI2 in E.coli M15. Methods Target gene β2GPⅠ-DI was cloned by PCR,the PCR products were connected into dimmer,the monomer and dimmer were inserted into PGEM-T easy vector and sequenced. Then they were inserted into an expression vector PQE30 and expressed in E.coli M15. The recombinant proteins were identified by Western blotting. Results The expected protein of hβ2GPⅠ-DI and hβ2GPⅠ-DI2 recombinant protein were synthesized, their relative molecular mass were 9 000 and 17 000. The two proteins could be recognized by hβ2GPⅠ mAb with Western blotting. Conclusion The monomer and dimmer of hβ2GPⅠ first domain gene are constructed successfully.

Key words: sub>GPⅠ, genetic vectors, gene expression

中图分类号: 

  • Q78