Antigenic analysis monoclonal antibodies against different epitopes of sigma B protein of Muscovy duck reovirus
文献类型: 外文期刊
第一作者: Li, Yongfeng
作者: Li, Yongfeng;Yin, Xiuchen;Chen, Xiaodan;Li, Xiaojun;Li, Jinzhe;Liu, Chunguo;Liu, Ming;Zhang, Yun
作者机构:
关键词: Muscovy duck reovirus (DRV);sigma B protein;Pepscan;Epitope
期刊名称:VIRUS RESEARCH ( 影响因子:3.303; 五年影响因子:3.445 )
ISSN: 0168-1702
年卷期: 2012 年 163 卷 2 期
页码:
收录情况: SCI
摘要: sigma B is one of the major structural proteins of Muscovy duck reovirus (DRV), which is able to induce protective immune response in target birds. Four anti-DRV sigma B MAbs were identified belong to two distinct epitopes, designated A (1E5, 4E3, and 5D8) and B (2F7) (Liu et al., 2010). To understand antigenic determinants of the sigma B protein, a set of 20 (P1-P20), partially overlapping and consecutive peptides spanning sigma B were expressed and then screened by MAbs. With Western blot and enzyme-linked immunosorbent assay (ELISA), two minimal units of the linear epitopes, 19YIRAPACWD27 (epitope B) and 65TDGVCF-PHHK74 (epitope A), were identified within N-terminal region of the sigma B protein. The epitope B was highly conserved among DRV and avian reovirus (ARV) strains through sequence alignment analysis. Immunofluorescence assays (IFA) and ELISA, confirmed that epitope B is a broad group-specific epitope among DRV and ARV. Epitope A could only react with chicken embyonated fibroblast cells (CEF) infected with DRV, but not ARV. However, both peptides have good immunogenicity and could induce antibodies against DRV in BALB/c mice. This report documents the first identification of sigma B epitopes in the precise locations. The two probes would be useful in the development of discriminating diagnostic kits for DRV and ARV infection. (C) 2011 Published by Elsevier B.V.
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