文献类型： 外文期刊
第一作者： Liu, Qiuge
作者： Liu, Qiuge;Wu, Jianxiao;Gao, Na;Zhang, Xiaorong;Gao, Mingze;Zhang, Xin;Guo, Longjun;Wu, Yang;Shi, Da;Shi, Hongyan;Chen, Jianfei;Feng, Li;Gao, Na;Zhang, Xiaorong
作者机构：
关键词： PDCoV; Accessory protein; NS6; Peptide scanning; Epitope
期刊名称：VIRUS RESEARCH （ 影响因子：5.0； 五年影响因子：4.0 ）
ISSN： 0168-1702
年卷期： 2024 年 341 卷
页码：
收录情况： SCI
摘要： Porcine deltacoronavirus (PDCoV) is a novel enteric coronavirus that can cause vomiting, watery diarrhea in pigs and the death of piglets. The open reading frame (ORF) 5 is one of the accessory genes in PDCoV genome and encodes an accessory protein NS6. To date, the function of NS6 is still unclear. In this study, the recombinant NS6 was successfully expressed in prokaryotic expression system and purified. To prepare monoclonal antibody (mAb), six-week-old female BALB/c mice were primed subcutaneously with purified NS6. A novel mouse mAb against NS6 was obtained and designated as 3D5. The isotype of 3D5 is IgG2b with kappa (kappa) light chain. 3D5 can specifically recognizes the natural NS6 in swine testis (ST) cells infected with PDCoV and expressed NS6 in human embryonic kidney 293T (HEK 293T) cells transfected with mammalian vector. The minimal linear B cell epitope recognised by 3D5 on NS6 was 25VPELIDPLVK34 determined by peptide scanning and named EP-3D5. The sequence of EP-3D5 is completely conserved among PDCoV strains. Moreover, six to nine residues of EP3D5 were identified to be conserved in non-PDCoV strains. These results provide valuable insights into the antigenic structure and function of NS6 in virus pathogenesis, and aid for the development of PDCoV epitopeassociated diagnostics and vaccine design.
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