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Development and characterization of monoclonal antibodies against p37 protein of African swine fever virus.
International Journal of Biological Macromolecules 2024 March 7
African Swine Fever Virus (ASFV) is a highly contagious pathogen posing a serious threat to the global swine industry. Despite this, there is currently no effective vaccine against this virus. Within ASFV's core shell structure, p37, a product of polyprotein pp220, shares sequence similarity with SUMO-1 proteases. Localization studies show p37 in various nuclear regions during early infection, shifting to the cytoplasm later on. Research indicates active export of p37 from the nucleus, mediated by CRM1-dependent and -independent pathways. Hydrophobic amino acids in p37 are crucial for these pathways, highlighting their importance throughout the ASFV replication cycle. Additionally, p37 serves as the first nucleocytoplasmic shuttle protein encoded by ASFV, participating in the intranuclear material transport process during ASFV infection of host cells. In this study, we successfully screened five murine monoclonal antibodies targeting p37. Through the truncated expression method, we identified four dominant antigenic epitopes of p37 for the first time. Furthermore, utilizing alanine scanning technology, we determined the key amino acid residues for each epitope. This research not only provides essential information for a deeper understanding of the protein's function but also establishes a significant theoretical foundation for the design and development of ASFV vaccines.
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