›› 2012, Vol. 39 ›› Issue (4): 42-46.

• 生物技术 • 上一篇    下一篇

J亚群禽白血病病毒gp85基因在毕赤酵母中的分泌表达

徐延伟, 高宏雷, 高玉龙, 李凯, 高立, 秦立廷, 祁小乐, 王永强, 王笑梅   

  1. 中国农业科学院哈尔滨兽医研究所禽传染病研究室,兽医生物技术国家重点实验室,黑龙江哈尔滨 150001
  • 收稿日期:2011-11-05 修回日期:1900-01-01 出版日期:2012-04-20 发布日期:2012-04-20
  • 通讯作者: 王笑梅

Secretory Expression of Avian Leukosis Virus Subgroup J gp85 Gene in Pichia pastoris

XU Yan-wei, GAO Hong-lei, GAO Yu-long, LI Kai, GAO Li, QIN Li-ting, QI Xiao-le, WANG Yong-qiang, WANG Xiao-mei   

  1. Division of Avian Infectious Diseases,State Key Laboratory of Veterinary Biotechnology,Harbin Veterinary Research Institute, Chinese Academy Agricultural Sciences,Harbin 150001,China
  • Received:2011-11-05 Revised:1900-01-01 Online:2012-04-20 Published:2012-04-20

摘要: 为获得J亚群禽白血病病毒gp85蛋白,将gp85基因克隆至毕赤酵母表达载体pPIC9K,构建了pPIC9K-gp85表达载体。将鉴定正确的表达载体经Sal Ⅰ酶切线性化后电转化毕赤酵母宿主菌GS115,经MD及G418抗性平板筛选后挑取阳性克隆进行PCR鉴定,获得重组酵母菌株GS115/pPIC9K-gp85。对阳性重组菌进行诱导表达,表达产物经SDS-PAGE、Western blotting和Dot-ELISA分析,结果表明,gp85基因在毕赤酵母中获得分泌表达,表达产物与J亚群禽白血病病毒多克隆抗体有良好的反应活性,分泌表达量达40 mg/L。本研究为J亚群禽白血病病毒诊断方法的建立及gp85蛋白的深入研究奠定了基础。

关键词: J亚群禽白血病; gp85基因; 毕赤酵母; 分泌表达

Abstract: To express recombinant gp85 protein of avian leukosis virus subgroup J (ALV-J) in P. pastoris, the gp85 gene was amplified and cloned into the pPIC9K vector. The recombinant plasmid pPIC9K-gp85 was identified, linearized with Sal Ⅰ and transformed into P.pastoris strain GS115 by electroporation. Transformants were selected on MD plates then on YPD plates containing G418 and confirmed by PCR. SDS-PAGE assay demonstrated that gp85 protein was expressed and secreted into the culture medium. The expression product amounted to 40 mg/L of culture under optimized condition. The recombinant gp85 protein showed good antigenicity in Western blotting and Dot-ELISA assays. This study laid the foundation for further study of the gp85 protein and the development of the diagnostic methods for ALV-J.

Key words: ALV-J; gp85 gene; Pichia pastoris; secretory expression

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