Citation: Yixin Hu, Zehui Li, Chenlin Hao, Hao Lu, Yunfei Xing, Kexin Liu, Xiaohui Jin, Zhanyong Wei. Identification of an immunodominant neutralizing epitope of porcine astrovirus type 5 capsid protein .VIROLOGICA SINICA, 2025, 40(2) : 296-299.  http://dx.doi.org/10.1016/j.virs.2025.03.003

Identification of an immunodominant neutralizing epitope of porcine astrovirus type 5 capsid protein

  • Highlights
    1. A neutralizing monoclonal antibody against the capsid protein of PAstV5 was prepared for the first time.
    2. The B cell epitope of PAstV5 capsid protein was identified for the first time.
    3. The monoclonal antibody 6c6 had strong neutralizing activity against PAstV5.
    4. The identified epitope formed an alpha spiral structure and located outside the three-dimensional structure of the protein.

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  • 10.1016j.virs.2025.03.003-ESM.docx
    1. Arias, C.F., DuBois, R.M., 2017. The astrovirus capsid: a review. Viruses 9, 15.

    2. Bridger, J.C., 1980. Detection by electron microscopy of caliciviruses, astroviruses and rotavirus-like particles in the faeces of piglets with diarrhoea. Vet. Rec. 107, 532-533.

    3. Cai, Y.H., Yin, W.Q., Zhou, Y.C., Li, B., Ai, L., Pan, M., Guo, W.Z., 2016. Molecular detection of porcine astrovirus in Sichuan Province, China. Virol. J. 13, 6.

    4. Fang, Q.L., Wang, C., Liu, H., Wu, Q.P., Liang, S.Y., Cen, M.L., Dong, Q.T., Wei, Y.Y., Chen, Y., Ouyang, K. et al., 2019. Pathogenic characteristics of a porcine astrovirus strain isolated in China. Viruses 11, 1156.

    5. Hao, C.L., Ren, H.J., Wu, X.Y., Shu, X.L., Li, Z.H., Hu, Y.T., Zeng, Q., Zhang, Y.C., Zu, S.P., Yuan, J. et al., 2022. Preparation of monoclonal antibody and identification of two novel b cell epitopes to vp1 protein of porcine sapelovirus. Vet. Microbiol. 275, 109593.

    6. Jin, X.H., Zhang, Y.F., Yuan, Y.X., Han, L., Zhang, G.P., Hu, H., 2021. Isolation, characterization and transcriptome analysis of porcine deltacoronavirus strain hnzk-02 from Henan Province, China. Mol. Immunol. 134, 86-99.

    7. Lee, S.Y., Kim, J.H., Kim, Y.J., Kim, Y.S., Roh, S.G., Lee, K.H., Kim, H.J., Shin, J.H., Oem, J.K., 2021. Astrovirus infection in cattle with nonsuppurative meningoencephalitis in South Korea. Viruses 13, 1941.

    8. Li, Z.H., Wu, X.Y., Zhang, Y.F., Li, Q.Q., Gao, J.L., Hu, Y.X., Yuan, J., Hu, H., Jin, X.H., Wei, Z.Y., 2024. Isolation and pathogenicity of a Chinese porcine astrovirus type 5 strain HNPDS-01 and its influence on cecum microbiota in piglets. Transbound. Emerg. Dis. 2024, 5777097.

    9. Mi, S.J., Guo, S.B., Xing, C.N., Xiao, C.N., He, B., Wu, B., Xia, X.Z., Tu, C.C., Gong, W.J., 2020. Isolation and characterization of porcine astrovirus 5 from a classical swine fever virus-infected specimen. J. Virol. 95, e01513-20.

    10. Ren, K.Q., Wang, R., Liu, X., Liu, Y.H., Zhang, J.T., Bi, J.Y., Zhao, L.F., Guo, Z.G., Liu, J.P., Yin, G.F., 2022. Epidemiological investigation and genetic characterization of porcine astrovirus genotypes 2 and 5 in Yunnan province, China. Arch. Virol. 167, 355-366.

    11. Ricemeyer, L., Aguilar-Hernandez, N., Lopez, T., Espinosa, R., Lanning, S., Mukherjee, S., Cuellar, C., Lopez, S., Arias, C.F., DuBois, R.M., 2022. Structures of two human astrovirus capsid/neutralizing antibody complexes reveal distinct epitopes and inhibition of virus attachment to cells. J. Virol. 96, e0141521.

    12. Su, M.J., Qi, S.S., Yang, D., Guo, D.H., Yin, B.S., Sun, D.B., 2020. Coinfection and genetic characterization of porcine astrovirus in diarrheic piglets in China from 2015 to 2018. Front. Vet. Sci. 7, 462.

    13. Xiao, C.T., Luo, Z., Lv, S.L., Opriessnig, T., Li, R.C., Yu, X.L., 2017. Identification and characterization of multiple porcine astrovirus genotypes in Hunan province, China. Arch. Virol. 162: 943-952.

    14. Ykema, M., Tao, Y.Z., 2021. Structural insights into the human astrovirus capsid. Viruses. 13, 821.

    15. Zhang, Y.F., Li, Q.Q., Si, L.L., Gao, J.L., Yuan, J., Xia, L., Hu, H., 2023. Isolation and characterization of porcine sapelovirus from the pdcov-positive sample and its molecular epidemiology in Henan province, China. Transbound. Emerg. Dis. 2023, 9943040.

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    Identification of an immunodominant neutralizing epitope of porcine astrovirus type 5 capsid protein

      Corresponding author: Xiaohui Jin, jinxiaohui2020@126.com
      Corresponding author: Zhanyong Wei, weizhanyong@henau.edu.cn
    • a. College of Veterinary Medicine, Henan Agriculture University, Zhengzhou, 450046, China;
    • b. Ministry of Education Key Laboratory for Animal Pathogens and Biosafety, Zhengzhou, 450046, China;
    • c. Henan Province Key Laboratory of Animal Food Pathogens Surveillance, Zhengzhou, 450046, China

    Abstract: Highlights
    1. A neutralizing monoclonal antibody against the capsid protein of PAstV5 was prepared for the first time.
    2. The B cell epitope of PAstV5 capsid protein was identified for the first time.
    3. The monoclonal antibody 6c6 had strong neutralizing activity against PAstV5.
    4. The identified epitope formed an alpha spiral structure and located outside the three-dimensional structure of the protein.

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