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Identification of a conserved conformational epitope in the VP2 protein of foot-and-mouth disease virus

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Abstract

Foot-and-mouth disease (FMD), caused by foot-and-mouth disease virus (FMDV), is a highly contagious infectious disease that affects domestic and wild cloven-hoofed animals worldwide. VP2 is a structural protein of FMDV. In this study, a potent FMDV serotype-independent monoclonal antibody (MAb) 3D9 was generated. Screening of a phage-displayed random 12-peptide library revealed that MAb 3D9 bound to phages displaying a consensus motif GVYxxAYxW that is highly homologous to the 89GVYxxxxxxxAYxxxxW105 motif in the FMDV VP2 protein. Importantly, this conformational epitope was highly conserved among all seven serotypes of FMDV analyzed in sequence alignments. To further verify the authentic epitope recognized by MAb 3D9, a FMDV O/YS/CHA/05 mutant virus V90A was generated using a reverse genetics system. The results revealed that Val90 was an important residue for MAb 3D9 binding within this conformational epitope. Thus, we finely mapped a conserved conformational epitope onto the FMDV VP2 protein. These results could be applied in the development of epitope-based vaccines and suitable MAb-based diagnostic methods for various FMDV serotype-independent tests.

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Acknowledgements

This work was supported by a grant from the Key Project of Heilongjiang Provincial Science and Technology Program (No. GA06B202).

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Authors and Affiliations

  1. State Key Laboratory of Veterinary Biotechnology, Division of Livestock Infectious Diseases, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, NO. 678 Haping Road Xiangfang District, Harbin, 150069, People’s Republic of China

    Wenming Liu, Baolin Yang, Mingxia Wang, Weifeng Liang, Haiwei Wang, Decheng Yang, Guohui Zhou & Li Yu

  2. Institute of Veterinary Medicine, Xinjiang Academy of Animal Science, 151 Eastern Kelamayi Street, Urumqi, 830000, People’s Republic of China

    Wenge Ma

Authors
  1. Wenming Liu
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  2. Baolin Yang
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  3. Mingxia Wang
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  4. Weifeng Liang
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  5. Haiwei Wang
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  6. Decheng Yang
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  7. Wenge Ma
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  8. Guohui Zhou
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  9. Li Yu
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Corresponding authors

Correspondence to Guohui Zhou or Li Yu.

Ethics declarations

Animal welfare and experimental procedures were carried out strictly according to the American Physiological Society’s Guiding Principles for the Care and Use of Animals and approved by the Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences. The animal ethics committee approval number is SYXK (Hei) 2012-2067.

Conflict of interest

The authors declare no conflict of interest.

Ethical approval

Mice were acclimatized for one week prior to the beginning of the experiment, and were bred in clean and spacious animal facilities, and handled humanely according to the rules described by the Animal Ethics Procedures and Guidelines of the People’s Republic of China and the Animal Ethics Committee of HVRI, Chinese Academy of Agricultural Sciences [SYXK (Hei) 2012-2067]. The mice were euthanized by exsanguination under deep anesthesia (intramuscular injection of chlorpromazine at 2-6 mg/kg) at the end of the experiment.

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Liu, W., Yang, B., Wang, M. et al. Identification of a conserved conformational epitope in the VP2 protein of foot-and-mouth disease virus. Arch Virol 162, 1877–1885 (2017). https://doi.org/10.1007/s00705-017-3304-6

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  • DOI: https://doi.org/10.1007/s00705-017-3304-6

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