生物技术通报 ›› 2017, Vol. 33 ›› Issue (11): 188-193.doi: 10.13560/j.cnki.biotech.bull.1985.2017-0379

• 研究报告 • 上一篇    下一篇

人GPC3基因的原核表达及多克隆抗体的制备

腾桥, 夏丽洁, 张富春   

  1. 新疆大学生命科学与技术学院 生物资源基因工程重点实验室,乌鲁木齐 830046
  • 收稿日期:2017-05-12 出版日期:2017-11-26 发布日期:2017-11-22
  • 作者简介:腾桥,女,硕士研究生,研究方向:分子免疫学;E-mail:851566931@qq.com
  • 基金资助:
    国家自然科学基金资助项目(31500752),新疆大学博士启动基金资助项目(BS150241)

Prokaryotic Expression of Human GPC3 and Preparation of Polyclonal Antibody

TENG Qiao, XIA Li-jie, ZHANG Fu-chun   

  1. Key Laboratory of Biological Resources and Genetic Engineering,College of Life Science and Technology,Xinjiang University,Urumqi 830046
  • Received:2017-05-12 Published:2017-11-26 Online:2017-11-22

摘要: 旨在构建人磷酯酰肌醇蛋白聚糖3(Glypican3,GPC3)原核蛋白,制备小鼠GPC3抗血清。扩增人 GPC3基因cDNA的完整的开放阅读框,克隆至pET28a原核表达载体,在大肠杆菌BL21表达菌株中诱导表达磷酯酰肌醇蛋白聚糖融合蛋白,利用亲和层析的方法纯化his-融合蛋白,通过SDS-PAGE电泳检测蛋白的纯度,并测定蛋白含量;免疫Balb/c小鼠,制备抗血清。结果显示,成功制备了小鼠抗GPC3多克隆抗体,抗体滴度为1∶51 200,经Western blot检查特异性良好。原核表达的重组人GPC3蛋白具有较好的免疫原性。

关键词: 磷酯酰肌醇蛋白聚糖3, 融合蛋白, 多克隆抗体

Abstract: This work aims to construct the prokaryotic protein of glypican3(GPC3)and to prepare its anti-serum to mouse. The complete open reading frame(ORF)of human GPC3’s cDNA was amplified by PCR,and then cloned into prokaryotic expression vector of pET28a. Further,the GPC3 fusion protein was expressed in Escherichia coli BL21,the fusion his-protein was purified by affinity chromatography and the fusion protein of purity was measured by SDS-PAGE electrophoresis. Finally,the protein content was also measured. The Balb/c mice were immunized by the purified protein for preparing the anti-serum,and the anti-serum was identified with ELISA analysis. Results showed that the polyclonal antibody against GPC3 protein was successfully prepared and the titer of antisera was 1:51200;moreover,the specificity was validated to be fine by Western blot. Conclusively,recombinant human GPC3 protein expressed in the prokaryotic system has strong immunogenicity.

Key words: glypican3, fusion protein, polyclonal antibody