›› 2009, Vol. 36 ›› Issue (7): 63-66.

• 生物技术 • 上一篇    下一篇

AsiaⅠ型口蹄疫病毒VP1基因在昆虫细胞/杆状病毒中的表达

丁银巧1,2,张文杰2,张云霞2,赵铁柱2,孙明2,遇秀玲2,赵德明1,田克恭2   

  1. (1.中国农业大学动物医学院, 北京 100193; 2.中国动物疫病预防控制中心兽医诊断室, 北京 100193)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-07-20 发布日期:2009-07-20
  • 通讯作者: 田克恭

Expression of Foot-and-mouth Disease Virus AsiaⅠVP1 Gene in Insect Cell/Baculovirus

DING Yin-qiao1,2, ZHANG Wen-jie2, ZHANG Yun-xia2, ZHAO Tie-zhu2, 
SUN Ming2, YU Xiu-ling2, ZHAO De-ming1, TIAN Ke-gong2
  

  1. (1.College of Veterinary Medicine, China Agricultural University, Beijing 100193, China;2.Veterinary Diagnostic Lab of China Animal Disease Prevent and Control Center, Beijing 100193, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-07-20 Published:2009-07-20
  • Contact: TIAN Ke-gong

摘要: 利用杆状病毒表达系统对AsiaⅠ型口蹄疫病毒(foot-and-mouth disease virus,FMDV)VP1基因在Sf9昆虫细胞中进行表达,为研究AsiaⅠ型FMDV VP1蛋白功能及建立AsiaⅠ型FMDV血清学诊断方法奠定基础。采用PCR方法从pGEM-T-Easy-AsiaⅠ型VP1质粒中扩增VP1基因,将其插入杆状病毒转座载体pFastBacHTA,构建的重组质粒pFastBacHTA-VP1再转入DH10Bac感受态细胞,经三重抗性与蓝白斑筛选,获得杆状病毒重组质粒Bacmid-VP 1,然后转染Sf9昆虫细胞。PCR鉴定证实VP1基因正确地插入到Bacmid中,成功构建了杆状病毒重组质粒Bacmid-VP1,SDS-PAGE和Western-blotting检测结果表明,VP1基因在Sf9昆虫细胞中表达出约26.5 ku的VP1蛋白。将可溶性表达的融合蛋白用Ni-NTA亲和层析方法进行纯化,通过ELISA分析,能特异性地检测出AsiaⅠ型口蹄疫病毒阳性血清。AsiaⅠ型FMDV VP1基因在杆状病毒表达系统中的成功表达为AsiaⅠ型FMDV VP1蛋白的抗原性及血清学抗体水平检测研究奠定了基础。

关键词: AsiaⅠ型口蹄疫病毒; VP1基因; 杆状病毒; 真核表达

Abstract: VP1 gene of foot-and-mouth virus (FMDV) AsiaⅠ was expressed in insect cell/Baculovirus expression system to lay a foundation for research of FMDV AsiaⅠ VP1 protein function and serology diagnostic method. The gene VP1 was amplified from the recombinant plasmid of FMDV AsiaⅠ by PCR and inserted into Baculovirus vector pFastBacHTA to get recombinant plasmid pFastBacHTA-VP1. The recombinant plasmid pFastBacHTA-VP1 was transformed into DH10Bac and the VP1 gene was integrated into Bacmid by site-specific transposition. Subsequently, the recombinant Bacmid-VP1 was transfected into Sf9 insect cells. The expressed product was identified by SDS-PAGE and Western blotting. The soluble fusion protein was purified by Ni-NTA affinity chromatography. ELISA analysis showed that the protein purified was reactive with the positive serum against FMDV AsiaⅠ. The successful expression of FMDV AsiaⅠ VP1 gene in insect cell/Baculovirus expression system provide material for research of antigenicity of AsiaⅠ VP1 protein as well as the surveillance of serology antibody.

Key words: foot-and-mouth disease virus AsiaⅠ; VP1 gene; Baculovirus; eukaryotic expression

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