SARS-CoV-2 structural proteins (Nucleocapsid, Membrane, and Envelope) (N, M, E)

The Other SARS-CoV-2 structural antigens refer to the Nucleocapsid (N), Membrane (M), and Envelope (E) proteins, which are essential components of the SARS-CoV-2 virion alongside the Spike protein. The Nucleocapsid protein (N) is a highly immunogenic phosphoprotein that binds to the viral RNA genome, ensuring its stability and packaging into the viral particle (UniProt: P0DTC9). The Membrane protein (M) is the most prevalent structural protein, acting as the central organizer of viral assembly by interacting with all other structural proteins (UniProt: P0DTC5). The Envelope protein (E) is a small integral membrane protein that functions as an ion channel (viroporin) and is crucial for viral budding and pathogenesis (UniProt: P0DTC4). While the Spike protein is the primary target for neutralizing antibodies, N, M, and E are vital targets for T-cell-mediated immunity and are extensively utilized in diagnostic assays to identify SARS-CoV-2 infection. Therapeutic development involving these antigens includes multi-epitope vaccines designed to provide broader protection against variants and experimental small molecules aimed at inhibiting the E protein's ion-channel activity.

Other names

SARS-CoV-2 N proteinSARS-CoV-2 M proteinSARS-CoV-2 E proteinNucleocapsid proteinMembrane proteinEnvelope proteinNon-spike structural proteins

Induction of T-cell-mediated immune response, diagnostic antigen detection, and experimental inhibition of viral ion channels.