Rotavirus A outer capsid proteins VP7 and VP4 (G1P genotype) (VP7/VP4 (G1P))

Rotavirus G1P antigens are the primary outer capsid proteins, VP7 (G-protein) and VP4 (P-protein), of the Rotavirus A species, specifically belonging to the G1 and P (typically P[8]) genotypes. VP7 is a 37-kDa glycoprotein that forms the smooth surface of the virus, while VP4 is an 88-kDa protease-sensitive protein that forms spikes extending from the surface [UniProt P04502, P12473]. These proteins are critical for viral pathogenesis; VP4 mediates attachment to host cell receptors, and VP7 facilitates membrane penetration and uncoating [Crawford et al., 2017]. In the context of human disease, the G1P[8] combination is the most prevalent genotype globally, responsible for a significant burden of severe dehydrating gastroenteritis in infants [Bányai et al., 2012]. These antigens are the principal targets of the host's protective immune response, particularly the production of neutralizing IgA and IgG antibodies that prevent viral entry into enterocytes [Angel et al., 2007]. Consequently, they serve as the basis for major live-attenuated vaccines, such as Rotarix (a monovalent G1P[8] human strain) and RotaTeq (a pentavalent bovine-human reassortant). These vaccines utilize the G1P antigens to induce long-term immunological memory, drastically reducing rotavirus-related hospitalizations and mortality worldwide [Burny et al., 2014].

Other names

Rotavirus G1P antigenVP7 glycoproteinVP4 protease-sensitive proteinG1P[8] antigenRotavirus surface proteinsRotavirus A outer capsid proteins

Induction of active immunity through the production of neutralizing antibodies (IgA and IgG) that target VP7 and VP4 to block viral attachment and entry into intestinal epithelial cells [Angel et al., 2007].