Target intelligence / Profile preview

SARS-CoV-2 Virus Antigen (SARS-CoV-2 Antigen)

Target
SARS-CoV-2 Antigen
Molecular classification
Glycoprotein, Phosphoprotein
01

Overview

SARS-CoV-2 virus antigens, primarily the Spike (S) glycoprotein and Nucleocapsid (N) phosphoprotein, are viral proteins recognized by the host immune system. The S protein mediates viral entry via ACE2 receptor binding and is the main target for neutralizing antibodies and vaccines. The N protein packages the viral RNA and is useful in diagnostics. Both elicit strong antibody responses, but only S protein antibodies confer direct neutralization.

Other names
SARS-CoV-2 Spike (S) glycoproteinSARS-CoV-2 Nucleocapsid (N) phosphoproteinS proteinN protein
02

Mechanism of action

Neutralization of viral entry (Spike antibodies), Induction of adaptive immunity (Spike vaccines)

03

Biological functions

Viral entryImmune recognitionRNA packagingStabilization of viral RNA genome
04

Disease associations

COVID-19Infection
05

Safety considerations

Antibody-dependent enhancement (ADE)Efficacy against variantsPotential for immune evasion
06

Interacting drugs

Monoclonal antibodies (targeting Spike)

1 more in the full profile.

07

Biomarkers

Anti-Spike antibody titersAnti-RBD antibody titersAnti-Nucleocapsid antibody titers

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