Viral envelope glycoprotein N-glycan

Viral envelope glycoprotein N-glycans are carbohydrate moieties attached to asparagine residues of viral envelope proteins through host-cell N-linked glycosylation machinery[7][1]. N-glycans account for a substantial fraction of the envelope protein's mass and play critical roles in proper folding, trafficking, and function of the glycoprotein[7][9]. They contribute to viral infectivity and facilitate immune evasion by shielding viral epitopes ("glycan shield"), modulating receptor binding and cell fusion, and influencing transmissibility and virulence[1][7][9]. The structural diversity and density of these glycans, such as high-mannose or complex types, have profound effects on viral interactions with host cells and responses to antiviral therapies and vaccines[2][9][11]. Drugs and antibodies targeting these glycan structures are in development, but therapeutic use is complicated by the shared biosynthetic pathways between viral and host proteins and by high glycan diversity[7][9].

Other names

N-linked glycan of viral envelope glycoproteinviral N-glycanenvelope N-glycanviral glycoprotein N-glycanviral envelope N-glycan

Inhibitors/antibodies block access to or correct folding of viral glycoproteins, impeding viral fusion and entry. Some drugs prevent glycan biosynthesis or maturation, leading to noninfectious viral particles.