Circulating SARS-CoV-2 spike N439K variants maintain fitness while evading antibody-mediated immunity



Thomson, Emma C, Rosen, Laura E, Shepherd, James G, Spreafico, Roberto, Filipe, Ana da Silva, Wojcechowskyj, Jason A, Davis, Chris, Piccoli, Luca, Pascall, David J, Dillen, Josh
et al (show 56 more authors) (2021) Circulating SARS-CoV-2 spike N439K variants maintain fitness while evading antibody-mediated immunity. CELL, 184 (5). 1171-+.

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Abstract

SARS-CoV-2 can mutate and evade immunity, with consequences for efficacy of emerging vaccines and antibody therapeutics. Here, we demonstrate that the immunodominant SARS-CoV-2 spike (S) receptor binding motif (RBM) is a highly variable region of S and provide epidemiological, clinical, and molecular characterization of a prevalent, sentinel RBM mutation, N439K. We demonstrate N439K S protein has enhanced binding affinity to the hACE2 receptor, and N439K viruses have similar in vitro replication fitness and cause infections with similar clinical outcomes as compared to wild type. We show the N439K mutation confers resistance against several neutralizing monoclonal antibodies, including one authorized for emergency use by the US Food and Drug Administration (FDA), and reduces the activity of some polyclonal sera from 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
Uncontrolled Keywords: ISARIC4C Investigators, COVID-19 Genomics UK (COG-UK) Consortium, Humans, Antibodies, Viral, Phylogeny, Virulence, Mutation, Genetic Fitness, Immune Evasion, Antibodies, Neutralizing, Spike Glycoprotein, Coronavirus, COVID-19, Angiotensin-Converting Enzyme 2, SARS-CoV-2
Depositing User: Symplectic Admin
Date Deposited: 26 Feb 2021 16:58
Last Modified: 18 Jan 2023 22:58
DOI: 10.1016/j.cell.2021.01.037
Open Access URL: https://doi.org/10.1016/j.cell.2021.01.037
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3116128