ArticleNature communications2026
Cryo-EM structure of African horse sickness virus VP2 receptor-binding protein enables nanoparticle vaccine design.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
African horse sickness virus (AHSV) is a lethal equine pathogen with no licensed vaccine other than vaccines containing attenuated virus, which pose safety risks. Endemic to sub-Saharan Africa, AHSV has caused epizootics in Spain and Portugal, Cyprus, Morocco, the Middle East, India and Pakistan and, most recently, Thailand. Here, we resolve the 3.11 Å cryo-EM structure of full-length VP2 from AHSV serotype 4, adopting its native triskelion architecture and shedding light on an α-helical domain anchoring the triskelion core, which is absent in other structurally characterized orbiviruses. Structure-guided mapping identified a subdomain of VP2 as a key target of neutralizing antibodies. Displayed on nanoparticles using the SpyCatcher/SpyTag technology, the domain conferred complete protection from clinical disease after viral challenge infection in mice and elicited robust and long-lasting immune responses in horses, the target species of AHSV. These findings provide a structural blueprint for the next generation of recombinant vaccines against AHSV and related orbiviruses.
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