Rotavirus structural proteins VP4 and VP7 (VP4/VP7)

Rotavirus structural proteins VP4 and VP7 are the primary components of the virus's outer capsid and serve as the critical determinants of viral infectivity and host range. VP4 is a non-glycosylated, protease-sensitive spike protein that mediates attachment to host cell receptors, such as sialic acids or integrins, and undergoes trypsin cleavage to facilitate membrane penetration [1.2.2, 1.3.1]. VP7 is a calcium-dependent glycoprotein that forms the outer shell of the virion and is essential for stabilizing the capsid and mediating cell entry [1.3.3, 1.4.1]. Together, these proteins define the G (VP7) and P (VP4) serotypes, which are the basis for rotavirus classification and the primary targets for neutralizing antibodies [1.2.1, 1.2.5]. Therapeutic strategies primarily involve live-attenuated vaccines like Rotarix and RotaTeq, which induce protective immunity against these antigens to prevent severe gastroenteritis in infants [1.1.1, 1.1.2]. Emerging research also investigates monoclonal antibodies and small-molecule inhibitors designed to block the attachment and uncoating processes mediated by these proteins [1.3.1, 1.3.3].

Other names

Outer capsid proteinsVP4 spike proteinVP7 glycoproteinP proteinG proteinProtease-sensitive proteinGlycoprotein

Induction of neutralizing antibodies that bind to VP4 and VP7, preventing viral attachment to host receptors and inhibiting the uncoating process required for cell entry [1.1.1, 1.3.3].