畜牧兽医学报 ›› 2013, Vol. 44 ›› Issue (11): 1832-1837.doi: 10.11843/j.issn.0366-6964.2013.11.019

• 预防兽医 • 上一篇    下一篇

非洲猪瘟病毒p54蛋白的高效表达及在ELISA中的应用

龚振华1,王丽萍1,2,臧京帅2,张康1,2,刘春菊1,吴晓东1,张启迪2,秦晓冰2,陈琳琳2,单虎2*,王树双1,王志亮1*   

  1. (1.中国动物卫生与流行病学中心,青岛266032;2.青岛农业大学动物科技学院,青岛266109)
  • 收稿日期:2013-09-04 出版日期:2013-11-23 发布日期:2013-11-23
  • 通讯作者: 王志亮,研究员,E-mail:zlwang111@163.com;单虎,教授,E-mail:shanhu67@163.com
  • 作者简介:龚振华(1968-),男,湖南岳阳人,副研究员,主要从事动物疫病诊断技术研究;王丽萍(1988-),女,山东青岛人,硕士生,主要从事动物传染病诊断与生物制品研究,E-mail: gzh1832@126.com,Tel: 0532-85652282。二人并列为第一作者
  • 基金资助:

    公益性行业科技专项-非洲猪瘟等重大外来动物疫病防控技术研究(200903037)

Studies on the Efficient Expression of African Swine Fever Virus p54 Protein and Its Antigenic Analysis in ELISA

GONG Zhen-hua1, WANG Li-ping1,2, ZANG Jing-shuai2, ZHANG Kang1,2, LIU Chun-ju1, WU Xiao-dong1, ZHANG Qi-di2, QIN Xiao-bing2, CHEN Lin-lin2, SHAN Hu2*, WANG Shu-shuang1, WANG Zhi-liang1*   

  1. (1. China Animal Health and Epidemiology Center, Qingdao 266032, China; 2.College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China)
  • Received:2013-09-04 Online:2013-11-23 Published:2013-11-23

摘要:

本研究旨在高效原核表达非洲猪瘟病毒(ASFVp54蛋白,并进一步将其用于ELISA试验研究。参考非洲猪瘟病毒 Con09/Bzz020 P54基因 (E183L)的核苷酸序列,通过序列优化后合成 P54基因,克隆至表达载体 pET-30c(+),构建重组质粒 pET-30c(+)-p54。结果显示,pET-30c(+)-p54有完整的阅读框架,可高效表达分子量约 20.7 kup54 蛋白,该蛋白表达稳定,具有可溶性,易于纯化,纯度高达900 μg·mL-1,所表达的p54蛋白的氨基酸序列与Con09/Bzz020 p54蛋白氨基酸序列相同;Western blot试验显示,表达的p54蛋白能与ASFV阳性血清发生特异性反应;ELISA试验显示,p54蛋白针对ASFV阳性血清和阴性血清的P/N值为4.67。研究结果证实p54蛋白表达产量高,易于纯化,具有较好的抗原性,可用于非洲猪瘟ELISA诊断。

关键词: 非洲猪瘟病毒, p54蛋白, ELISA

Abstract:

In this study, p54 protein of African swine fever virus (ASFV) was prokaryotically expressed efficiently, and the expressed p54 protein was tested to be specific to ASFV in ELISA. A sequence-optimized P54 gene was synthesized with reference of P54 gene (E183L) sequence of ASFV Con09/Bzz020 strain, the synthesized ASFV P54 gene was cloned into pET-30c(+) and the recombinant plasmid pET-30c(+)-p54 was obtained. Nucleotide sequence analysis of pET-30c(+)-p54 showed that the synthesized sequence-optimized P54 gene was cloned successfully into pET-30c(+) with the right reading frame. The p54 fusion protein with approximately 20.7 kDa was expressed efficiently, solubly and stably, and easily to be purified with the purity at 900 μg·mL-1, the expressed p54 protein had the same amino acid sequence as the p54 protein of Con09/Bzz020, the expressed p54 protein was tested to be specific to anti-ASFV serum in Western-blot and had a P/N value of ASFV at 4.67 in ELISA. The results suggested that the expressed p54 protein with high yield was easy to be purified and was specific to anti-ASFV sera, and it could be used for diagnosis of ASFV by ELISA.

Key words: African swine fever virus, p54 protein, ELISA

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