Target intelligence / Profile preview

SARS-CoV-2 Antigen

Target: SARS-CoV-2 Antigen
Molecular classification: Viral Protein, Glycoprotein, Phosphoprotein, Structural Protein

Overview

SARS-CoV-2 antigens are viral proteins produced by the SARS-CoV-2 virus, which causes COVID-19. These antigens, primarily the Spike (S) glycoprotein and Nucleocapsid (N) phosphoprotein, are key targets for diagnostic tests and immune responses. Antigen tests detect these proteins to diagnose current infection. Vaccines use the spike protein to elicit neutralizing antibodies, preventing viral entry into host cells. The presence of antibodies against these antigens can also be used to determine prior exposure to the virus.

Other names: SARS-CoV-2 Spike GlycoproteinSARS-CoV-2 Nucleocapsid PhosphoproteinSARS-CoV-2 Membrane ProteinSARS-CoV-2 Envelope ProteinS proteinN proteinM proteinE proteinCOVID-19 Antigen

Mechanism of action

Monoclonal antibodies: Neutralize the virus by binding to antigens, preventing cell entry. Vaccines: Stimulate the production of antibodies and T cells that target viral antigens. Antiviral agents: Inhibit the function of viral proteins essential for replication.

Biological functions

Viral EntryViral ReplicationImmune Response InductionAntibody BindingT cell activation

Disease associations

COVID-19InfectionImmune Response

Safety considerations

Cross-reactivity with other coronavirusesPotential for false-negative antigen test results (especially in early or late infection)Antibody-dependent enhancement (ADE) (theoretical risk, primarily for specific antibody profiles)Vaccine-related adverse events (e.g., allergic reactions, myocarditis -rare- with mRNA vaccines)

Interacting drugs

Monoclonal Antibodies (e.g., against Spike protein)

2 more in the full profile.

Biomarkers

Antigen levels in diagnostic tests (nasal swab, saliva)Antibody titers against specific antigens (e.g., Spike, Nucleocapsid)T cell responses to viral antigens

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