Identification of three novel linear B-cell epitopes on the VP5 protein of BTV16

文献类型： 外文期刊

第一作者： Wang, Wen-Shi

作者： Wang, Wen-Shi;Sun, En-cheng;Liu, Ni-Hong;Yang, Tao;Xu, Qing-Yuan;Qin, Yong-Li;Zhao, Jing;Feng, Yu-Fei;Li, Jun-Ping;Wei, Peng;Zhang, Cui-Yun;Wu, Dong-lai

作者机构：

关键词： Bluetongue virus;VP5 protein;Epitopes;Monoclonal antibodies

期刊名称：VETERINARY MICROBIOLOGY （ 影响因子：3.293； 五年影响因子：3.599 ）

ISSN： 0378-1135

年卷期： 2013 年 162 卷 2-4 期

页码：

收录情况： SCI

摘要： Bluetongue virus (BTV) VP5 protein is an important antigenic protein which is centrally involved in serotype determination and the virus entry process. Very little is known about the B-cell epitopes on the BTV VP5 protein recognized by humoral immune responses. In this study, we generated five BTV16 VP5 protein-specific monoclonal antibodies (MAbs), named 3B11, 2B10, 1H7, 4A6 and 3G9, and defined the linear epitopes recognized by MAbs using a series of peptides expressed as maltose-binding protein (MBP)-fusion polypeptides. Three novel linear B-cell epitopes were identified: 3B11 and 3G9 recognized the motif ITANTREIQHIKEE; 2B10 recognized the motif LSGID; and 4A6 recognized the motif STMVKEYRQKIDALKA. Exact sequences corresponding to the three motifs identified were found in the BTV16 VP5 protein ((310)ITANTREIQHIKEE(323,265)LSGID(269) and (188)STMVKEYRQKIDALKA(203)). These motifs represent the minimal linear peptide sequence required for MAb reactivity, as binding of each MAb was abolished when additional amino acids were removed from the amino and carboxy termini of the peptide. Amino acid sequence alignment indicated that three epitopes were totally conserved among different BTV16 strains. The MAbs generated along with identified epitopes will be useful for examining VP5 protein function and the development of epitope-based marker vaccines against BTV. (C) 2012 Elsevier B.V. All rights reserved.

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