Non-structural protein 13 helicase (SARS-CoV-2) (NSP13)

Non-structural protein 13 helicase (NSP13) is a multifunctional and highly conserved enzyme encoded by SARS-CoV-2 and related coronaviruses, essential for viral replication and transcription. It unwinds double-stranded RNA or DNA in a 5′ to 3′ direction using energy from ATP hydrolysis and cooperates with other viral non-structural proteins, including RNA-dependent RNA polymerase (nsp12), to facilitate viral genome synthesis and proofreading. NSP13 has a five-domain structure, including N-terminal zinc binding, stalk, beta-barrel, and two RecA-like helicase domains that provide nucleotide binding and catalytic functions. It is considered a high-priority antiviral drug target due to its essential role in the viral life cycle, high sequence conservation, and the identification of multiple druggable binding pockets. Mutations in NSP13 have been linked to antiviral drug resistance, particularly for remdesivir, underscoring its clinical relevance for surveillance and therapeutic development.

Other names

SARS-CoV-2 NSP13nsp13 helicaseNon-structural protein 13 (helicase)

Direct inhibition of NSP13 ATPase or helicase (e.g., SSYA10-001, chromone-4c, bananin); Steric or allosteric inhibition of nucleotide or RNA binding pocket; Indirect resistance when viral mutations interfere with drug efficacy.