A shark-derived broadly neutralizing nanobody targeting a highly conserved epitope on the S2 domain of sarbecoviruses.

ABSTRACT: The continuously evolving Omicron subvariants has diminished the effectiveness of almost all RBD-targeted antibodies in neutralizing these subvariants. The development of broad-spectrum neutralizing antibodies is desired for addressing both current and future variants. Here, we identified a shark-derived nanobody, 79C11, that can neutralize all Omicron subvariants tested so far, including BA.1 to JN.1 and KP.2, and exhibits comparable neutralizing potency against SARS-CoV-1 and pangolin coronavirus. Intranasal instillation of 79C11 can effectively prevent the infection of Omicron subvariant XBB in vivo. The designs of multivalent forms of 79C11 further enhance binding and neutralizing activity. Epitope mapping and structure simulation reveal that this nanobody binds to a highly conserved H

SUBMITTER: Feng B 

PROVIDER: S-EPMC11829523 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature