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  • Title: Epitope mapping of African swine fever virus (ASFV) structural protein, p54.
    Author: Petrovan V, Murgia MV, Wu P, Lowe AD, Jia W, Rowland RRR.
    Journal: Virus Res; 2020 Apr 02; 279():197871. PubMed ID: 32004574.
    Abstract:
    In the absence of a vaccine for African swine fever virus (ASFV), diagnostic tools are critical for early detection and implementation of control measures. Along with other immunogenic proteins, p54 is a good serological target for conducting ASF detection and surveillance. In this study, a panel of 12 mouse monoclonal antibodies (mAbs) was prepared against a baculovirus-expressed p54(60-178) polypeptide. Further screening showed that five mAbs were positive for reactivity against ASFV-infected cells and recombinant p54 proteins. Mapping studies using five polypeptides and 12 oligopeptides, showed that mAb #154-1 recognized a conserved polypeptide sequence, p54(65-75), and was placed into Group 1. Mabs #143-1 and #7 recognized a region covered by p54(93-113) and were placed into Group 2. Group 3 consisted of mAbs #101 and #117, which recognized p54(118-127). Sera from pigs infected with the low virulent OURT 88/3 strain recognized the same p54 region covered by the Group 3 mAbs. When tested in a neutralization format, only mAb #143-1 showed neutralization activity above background. Together, the results identify important antigenic and immunogenic regions located on p54, which provide new tools for improving ASFV diagnostics.
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