中国畜牧兽医

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猪繁殖与呼吸综合征病毒核衣壳蛋白与糖蛋白的表达纯化及鉴定

张辉,崔焕忠,兰海楠,杨艳红,付志玲,郑鑫   

  1. (吉林农业大学动物科学技术学院,吉林长春 130118)
  • 收稿日期:2013-08-22 出版日期:2014-03-20 发布日期:2014-05-15
  • 通讯作者: 郑鑫(1965—),女,博士,教授。E-mail:zhengxin_3@yahoo.com.cn
  • 作者简介:张辉(1973—),女,吉林人,博士后,高级实验师,研究方向:动物疫病检测。
  • 基金资助:

    吉林省世行贷款农产品质量安全项目(2011-Y28);科技部农业科技成果转化资金(2012GB2B100106);吉林农业大学启动基金(201221);吉林省科技发展计划项目(20100230);吉林省科技发展计划项目(20110230)。

Expression,Purification and Identification of Nucleocapsid Protein and Glycoprotein of Porcine Reproductive and Respiratory Syndrome Virus

ZHANG Hui, CUI Huan-zhong, LAN Hai-nan, YANG Yan-hong, FU Zhi-ling, ZHENG Xin   

  1. (College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China)
  • Received:2013-08-22 Online:2014-03-20 Published:2014-05-15

摘要: 为获得猪繁殖与呼吸综合征病毒(porcine reproductive and respiratory syndrome virus,PRRSV)核衣壳蛋白(N)和糖蛋白(E),试验通过RT-PCR反应获得ORF7和ORF5基因片段,分别克隆至原核表达载体 pET-28a(+),转化至大肠杆菌 BL21(DE3)中诱导表达,SDS-PAGE分析目的蛋白表达情况,Western blotting 检测表达蛋白的免疫活性,采用亲和层析对表达蛋白进行纯化。结果表明,成功表达N和E融合蛋白,Western blotting结果表明表达蛋白具有良好的反应原性,纯化蛋白的纯度分别为89%和90%。融化蛋白的表达为PRRSV的分子生物学功能研究和测定抗体检测方法的建立奠定了基础。

关键词: 猪繁殖与呼吸综合征病毒; 核衣壳蛋白; 糖蛋白; 表达

Abstract: In order to gain nucleocapsid protein (N) and glycoprotein (E) of porcine reproductive and respiratory syndrome virus (PRRSV), the total RNA was extracted,ORF7 and ORF5 genes were obtained by RT-PCR, inserted into pET-28a(+) vector, and then transformed into Escherichia coli BL21(DE3),respectively. The expressed products were identified by SDS-PAGE and Western blotting, and purified by affinity chromatography. The results showed that N and E fusion protein were successfully expressed and the proteins had good reactionogenicities by Western blotting analysis. The purities of the purified proteins were 89% and 90%, respectively. This study could lay foundations for molecular biological function research and establishment of test methods for detection antibodies of PRRSV.

Key words: porcine reproductive and respiratory syndrome virus; nucleocapsid protein; glycoprotein; expression