Venezuelan equine encephalitis virus structural polyprotein (VEEV structural proteins) (VEEV structural proteins)

The Venezuelan equine encephalitis virus (VEEV) structural polyprotein is a precursor protein that is post-translationally cleaved into five individual proteins: Capsid (C), E3, E2, 6K, and E1 (UniProt: P03316). The E2 and E1 glycoproteins are the most critical components for therapeutic intervention, as they form heterodimeric spikes on the virion surface that facilitate host cell entry. Specifically, E2 mediates attachment to host cell receptors, while E1 facilitates pH-dependent membrane fusion within endosomes (PubMed: 22114335). These proteins serve as the primary antigens for the host's protective immune response, making them the focal point for vaccine development and neutralizing monoclonal antibody therapies (PubMed: 25609801). VEEV is a highly infectious alphavirus that causes severe febrile illness and can progress to potentially fatal encephalitis in both humans and equines (NIH: NIAID). Medical countermeasures targeting these structural proteins, such as the TC-83 and C-84 vaccines, aim to prevent viral attachment or fusion, thereby neutralizing the virus's ability to infect the central nervous system (PubMed: 28468879).

Other names

VEEV structural polyproteinVEEV E1/E2 glycoproteinsVEEV virion antigensVEEV envelope proteinsVEEV C-E3-E2-6K-E1 polyprotein

Induction of neutralizing antibodies to block viral attachment and fusion; direct neutralization of virions by exogenous antibodies to prevent CNS entry.