Thomson, Emma C; Rosen, Laura E; Shepherd, James G; Spreafico, Roberto; da Silva Filipe, Ana; Wojcechowskyj, Jason A; Davis, Chris; Piccoli, Luca; Pascall, David J; Dillen, Josh; +48 more... Lytras, Spyros; Czudnochowski, Nadine; Shah, Rajiv; Meury, Marcel; Jesudason, Natasha; De Marco, Anna; Li, Kathy; Bassi, Jessica; O’Toole, Aine; Pinto, Dora; Colquhoun, Rachel M; Culap, Katja; Jackson, Ben; Zatta, Fabrizia; Rambaut, Andrew; Jaconi, Stefano; Sreenu, Vattipally B; Nix, Jay; Jarrett, Ruth F; Beltramello, Martina; Nomikou, Kyriaki; Pizzuto, Matteo; Tong, Lily; Cameroni, Elisabetta; Johnson, Natasha; Wickenhagen, Arthur; Ceschi, Alessandro; Mair, Daniel; Ferrari, Paolo; Smollett, Katherine; Sallusto, Federica; Carmichael, Stephen; Garzoni, Christian; Nichols, Jenna; Galli, Massimo; Hughes, Joseph; Riva, Agostino; Ho, Antonia; Semple, Malcolm G; Openshaw, Peter JM; Baillie, J Kenneth; Rihn, Suzannah J; Lycett, Samantha J; Virgin, Herbert W; Telenti, Amalio; Corti, Davide; Robertson, David L; Snell, Gyorgy; (2020) The circulating SARS-CoV-2 spike variant N439K maintains fitness while evading antibody-mediated immunity. bioRXiv preprints. DOI: https://doi.org/10.1101/2020.11.04.355842
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Abstract
SARS-CoV-2 can mutate to evade immunity, with consequences for the efficacy of emerging vaccines and antibody therapeutics. Herein we demonstrate that the immunodominant SARS-CoV-2 spike (S) receptor binding motif (RBM) is the most divergent region of S, and provide epidemiological, clinical, and molecular characterization of a prevalent RBM variant, N439K. We demonstrate that N439K S protein has enhanced binding affinity to the hACE2 receptor, and that N439K virus has similar clinical outcomes and in vitro replication fitness as compared to wild- type. We observed that the N439K mutation resulted in immune escape from a panel of neutralizing monoclonal antibodies, including one in clinical trials, as well as from polyclonal sera from a sizeable fraction of persons recovered from infection. Immune evasion mutations that maintain virulence and fitness such as N439K can emerge within SARS-CoV-2 S, highlighting the need for ongoing molecular surveillance to guide development and usage of vaccines and therapeutics.
Item Type | Article |
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Faculty and Department | Faculty of Infectious and Tropical Diseases > Dept of Clinical Research |
Research Centre | Covid-19 Research |
Elements ID | 154616 |