9AU1

SARS-CoV-2 XBB.1.5 RBD bound to the VIR-7229 and the S309 Fab fragments

Summary for 9AU1

• Entry DOI: 10.2210/pdb9au1/pdb
• Descriptor: S309 Fab heavy chain, 2-acetamido-2-deoxy-beta-D-glucopyranose, S309 Fab light chain, ... (11 entities in total)
• Functional Keywords: sarbecoviruses, spike glycoprotein, fusion protein, neutralizing antibodies, inhibitor, viral protein, structural genomics, structural genomics consortium, sgc
• Biological source: Homo sapiens (human); More
• Total number of polymer chains: 5
• Total formula weight: 124038.39

Authors

Rietz, T.,Park, Y.J.,Errico, J.,Czudnochowski, N.,Nix, J.C.,Corti, D.,Snell, G.,Marco, A.D.,Pinto, D.,Cameroni, E.,Seattle Structural Genomics Center for Infectious Disease (SSGCID),Veesler, D.,Structural Genomics Consortium (SGC) (deposition date: 2024-02-27, release date: 2024-10-16, Last modification date: 2024-12-25)

Primary citation

Rosen, L.E.,Tortorici, M.A.,De Marco, A.,Pinto, D.,Foreman, W.B.,Taylor, A.L.,Park, Y.J.,Bohan, D.,Rietz, T.,Errico, J.M.,Hauser, K.,Dang, H.V.,Chartron, J.W.,Giurdanella, M.,Cusumano, G.,Saliba, C.,Zatta, F.,Sprouse, K.R.,Addetia, A.,Zepeda, S.K.,Brown, J.,Lee, J.,Dellota Jr., E.,Rajesh, A.,Noack, J.,Tao, Q.,DaCosta, Y.,Tsu, B.,Acosta, R.,Subramanian, S.,de Melo, G.D.,Kergoat, L.,Zhang, I.,Liu, Z.,Guarino, B.,Schmid, M.A.,Schnell, G.,Miller, J.L.,Lempp, F.A.,Czudnochowski, N.,Cameroni, E.,Whelan, S.P.J.,Bourhy, H.,Purcell, L.A.,Benigni, F.,di Iulio, J.,Pizzuto, M.S.,Lanzavecchia, A.,Telenti, A.,Snell, G.,Corti, D.,Veesler, D.,Starr, T.N.
A potent pan-sarbecovirus neutralizing antibody resilient to epitope diversification.
Cell, 187:7196-, 2024

PubMed Abstract: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) evolution has resulted in viral escape from clinically authorized monoclonal antibodies (mAbs), creating a need for mAbs that are resilient to epitope diversification. Broadly neutralizing coronavirus mAbs that are sufficiently potent for clinical development and retain activity despite viral evolution remain elusive. We identified a human mAb, designated VIR-7229, which targets the viral receptor-binding motif (RBM) with unprecedented cross-reactivity to all sarbecovirus clades, including non-ACE2-utilizing bat sarbecoviruses, while potently neutralizing SARS-CoV-2 variants since 2019, including the recent EG.5, BA.2.86, and JN.1. VIR-7229 tolerates extraordinary epitope variability, partly attributed to its high binding affinity, receptor molecular mimicry, and interactions with RBM backbone atoms. Consequently, VIR-7229 features a high barrier for selection of escape mutants, which are rare and associated with reduced viral fitness, underscoring its potential to be resilient to future viral evolution. VIR-7229 is a strong candidate to become a next-generation medicine.

PubMed: 39383863
DOI: 10.1016/j.cell.2024.09.026

Experimental method

X-RAY DIFFRACTION (2.41 Å)