Download MendeleyStructure and Antigenicity of the Porcine Astrovirus 4 Capsid Spike.
Haley, D.J., Lanning, S., Henricson, K.E., Mardirossian, A.A., Cirillo, I., Rahe, M.C., DuBois, R.M.(2024) Viruses 16
- PubMed: 39459929 Search on PubMedSearch on PubMed Central
- DOI: https://doi.org/10.3390/v16101596
- Primary Citation Related Structures:
9CP0 - PubMed Abstract:
Porcine astrovirus 4 (PoAstV4) has been recently associated with respiratory disease in pigs. In order to understand the scope of PoAstV4 infections and to support the development of a vaccine to combat PoAstV4 disease in pigs, we designed and produced a recombinant PoAstV4 capsid spike protein for use as an antigen in serological assays and for potential future use as a vaccine antigen. Structural prediction of the full-length PoAstV4 capsid protein guided the design of the recombinant PoAstV4 capsid spike domain expression plasmid. The recombinant PoAstV4 capsid spike was expressed in Escherichia coli , purified by affinity and size-exclusion chromatography, and its crystal structure was determined at 1.85 Å resolution, enabling structural comparisons to other animal and human astrovirus capsid spike structures. The recombinant PoAstV4 capsid spike protein was also used as an antigen for the successful development of a serological assay to detect PoAstV4 antibodies, demonstrating that the recombinant PoAstV4 capsid spike retains antigenic epitopes found on the native PoAstV4 capsid. These studies lay a foundation for seroprevalence studies and the development of a PoAstV4 vaccine for swine.
- Department of Biomolecular Engineering, University of California Santa Cruz, Santa Cruz, CA 95064, USA.
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