Viral envelope glycoprotein (None (the abbreviation is often virus-specific, e.g., "gp120" for HIV, "E" for flaviviruses, "S" for coronaviruses[1][3][4][6]))

Viral envelope glycoproteins are transmembrane proteins found in the lipid envelopes of many viruses, responsible for mediating virus binding and entry into host cells via interaction with host receptors and induction of membrane fusion[1][2][3][4][5][6][7]. These proteins are highly glycosylated, contributing to immune evasion and determining host range, cell tropism, and pathogenesis. They are structurally diverse and can be classified by their fusion mechanism (Class I, II, or III), and are critical targets for prophylactic vaccines, therapeutic monoclonal antibodies, and small molecule antivirals[1][3][4][6][7]. These glycoproteins play dual roles in both virion assembly/disassembly and immune modulation, and their structure and glycosylation patterns are closely tied to their biological functions and evolution[1][2][3][5].

Other names

Envelope proteinSpike proteinSurface glycoproteinMembrane fusion proteinExamples: gp120 (HIV-1)E protein (flaviviruses)S protein (coronaviruses)Gn/Gc (phleboviruses)HA (Influenza)

Inhibition of viral attachment/binding to host receptors; Blockade of membrane fusion; Neutralization of viral infectivity by antibody binding to glycoprotein epitopes; Preventing viral uptake or egress through interference with glycoprotein interactions