Rotavirus outer capsid proteins VP7 and VP4 (G4P genotype) (Rotavirus G4P antigen)

The Rotavirus G4P antigen refers to the specific combination of the outer capsid proteins VP7 (G-type) and VP4 (P-type) found on the surface of Rotavirus particles, specifically the G4 and P[8] genotypes. VP7 is a glycoprotein that forms the smooth outer shell of the virus, while VP4 forms the spikes required for attachment to host cell receptors and subsequent membrane penetration. These proteins are the primary targets of the host's neutralizing antibody response and are critical components in the design of both monovalent and multivalent live-attenuated vaccines. In clinical practice, targeting these antigens through vaccination has significantly reduced the global burden of severe pediatric gastroenteritis and dehydration. The G4P[8] combination is one of the most common strains circulating globally, making it a vital target for ensuring broad vaccine efficacy and monitoring through molecular epidemiology.

Other names

Rotavirus G4P[8] antigenVP7 G4 typeVP4 P typeRotavirus surface antigensG4P[8] genotype

Vaccines containing these antigens induce active immunity by stimulating the production of neutralizing antibodies (IgA and IgG) that target the VP7 and VP4 proteins, thereby preventing viral attachment and entry into intestinal epithelial cells.