猪繁殖与呼吸综合征病毒GP5蛋白在昆虫杆状病毒表达系统中的表达与鉴定  

Expression and Characterization of Porcine Reproductive and Respiratory Syndrome Virus GP5 Protein in Insect Baculovirus Expression System

作　　者：黄袁慧 马静 王乃迪 张昕 张莹 兰冰洁 刘玉良[2] 倪建强[2] 周智[2] 李义平 王传彬[2] HUANG Yuanhui;MA Jing;WANG Naidi;ZHANG Xin;ZHANG Ying;LAN Bingjie;LIU Yuliang;NI Jianqiang;ZHOU Zhi;LI Yiping;WANG Chuanbin(College of Animal Science and Technology,Guangxi University,Nanning 530005,China;China Animal Disease Control Center,Beijing 102618,China;Zhongshan School of Medicine,Sun Yet-sen University,Guangzhou 510080,China)

机构地区：[1]广西大学动物科技学院,南宁530005 [2]中国动物疫病预防控制中心,北京102618 [3]中山大学中山医学院,广州510080

出　　处：《中国动物传染病学报》2024年第4期195-200,共6页Chinese Journal of Animal Infectious Diseases

基　　金：现代农业产业体系北京市创新团队(BAIC02-2021)。

摘　　要：猪繁殖与呼吸综合征病毒(Porcine reproductive and respiratory syndrome virus,PRRSV)GP5蛋白是病毒主要囊膜结构蛋白和中和抗体主要靶蛋白,广泛应用于PRRS新型疫苗和诊断技术的研究。为获得具有与天然构象相近的PRRSV GP5蛋白,本研究根据草地贪夜蛾(Spdopterafrugiperda)密码子偏好性,优化PRRSV ORF5基因编码密码子,并克隆至杆状病毒载体后转染Sf9昆虫细胞,构建了重组杆状病毒rBac-PRRSV-GP5。经Western blot证实GP5蛋白在Sf9细胞中获得高效表达,且具有良好的免疫反应原性。经镍离子亲和层析纯化后,获得高纯度的重组GP5蛋白,为开展PRRSV诊断技术研发、生物学功能研究等奠定了抗原基础。Porcine reproductive and respiratory syndrome virus(PRRSV)GP5 protein is the main envelope structural protein of the virus and main target protein of neutralizing antibodies,which is widely used for the development of new vaccines and diagnostic approaches for PRRS.In order to maintain the natural structure of the PRRSV GP5 protein,the PRRSV ORF5 gene was optimized according to the codon preference of Spdopterafrugiperda,subsequently subcloned into the baculovirus vector and transfected into the Sf9 insect cells for expression of the recombinant rBac-PRRSV-ORF5.Western blot analysis showed that the GP5 protein was efficiently expressed in the Sf9 insect cells and exhibited high immunogenicity.The recombinant GP5 protein was further purified with nickel ion affinity chromatography.Our data laid a foundation for the biological study and development of diagnostic methods for PRRSV.

关 键 词：猪繁殖与呼吸综合征病毒 ORF5基因 GP5蛋白 表达 蛋白纯化 

分 类 号：S852.651[农业科学—基础兽医学]