Neuraminidase non-active site epitope (NA non-active site epitope)

Neuraminidase non-active site epitopes are regions on the surface of the neuraminidase enzyme of the influenza virus that lie outside the catalytic active site. While the classical drug target is the conserved active site responsible for sialic acid cleavage (and inhibited by drugs like oseltamivir and zanamivir), non-active site epitopes are increasingly being studied as targets for broadly neutralizing antibodies that may restrict viral spread, facilitate immune clearance, and reduce development of drug resistance. These surface-exposed regions differ among neuraminidase serotypes and strains, potentially allowing vaccines and antibody therapies to target conserved or strain-specific epitopes. Their relevance has increased due to resistance to active-site inhibitors and as part of universal influenza vaccine strategies.

Other names

Neuraminidase surface epitope (non-catalytic)NA non-catalytic epitopeInfluenza NA non-active site domain

Antibody binding to non-active site epitopes can neutralize virus by blocking neuraminidase function or preventing viral release, even if the active site is unoccupied. Potential inhibition of protein function via steric hindrance, aggregation, or immune-mediated clearance