Download MendeleyUpdate and reuse: Structure-guided nanobody evolution against SARS-CoV-2 escape.
Bu, F., Saxena, D., Turner-Hubbard, H., Delaney, A., Batra, L., Fricke, C., Moye, S., Verma, A., Perlman, S., Bhandari, J., Liu, B., Ye, G., Zheng, J., Li, F.(2026) PLoS Pathog 22: e1014223-e1014223
- PubMed: 42149970 Search on PubMedSearch on PubMed Central
- DOI: https://doi.org/10.1371/journal.ppat.1014223
- Primary Citation Related Structures:
9Z1M, 9Z1N - PubMed Abstract:
SARS-CoV-2 continues to accumulate spike mutations that erode the efficacy of antibody therapeutics. The Q493E mutation in the spike RBD, present in recent Omicron subvariants, enables escape from many antibodies and nanobodies, including our Nanosota-9A nanobody, which neutralizes Omicron JN.1 (Q493) but not KP.3 (E493). To address this, we applied a structure-guided in vitro evolution strategy to engineer Nanosota-9A, generating Nanosota-9B, which binds the KP.3 RBD with high affinity but shows reduced binding to JN.1 RBD. To regain breadth, we engineered a bispecific nanobody combining Nanosota-9A and -9B, which effectively neutralizes both JN.1 and KP.3 in infection assays. Our results provide proof of concept for an "update and reuse" strategy: applying structure-guided engineering to update and reuse validated nanobodies to overcome variant escape. This strategy offers a practical path to maintain therapeutic coverage as the virus evolves, supporting more efficient use of research resources and faster responses to emerging variants.
- Department of Pharmacology, University of Minnesota Medical School, Minneapolis, Minnesota, United States of America.
Organizational Affiliation:
