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Title | SARS-CoV-2 immune evasion by the B.1.427/B.1.429 variant of concern. |
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Journal, issue, pages | Science, Vol. 373, Issue 6555, Page 648-654, Year 2021 |
Publish date | Aug 6, 2021 |
Authors | Matthew McCallum / Jessica Bassi / Anna De Marco / Alex Chen / Alexandra C Walls / Julia Di Iulio / M Alejandra Tortorici / Mary-Jane Navarro / Chiara Silacci-Fregni / Christian Saliba / Kaitlin R Sprouse / Maria Agostini / Dora Pinto / Katja Culap / Siro Bianchi / Stefano Jaconi / Elisabetta Cameroni / John E Bowen / Sasha W Tilles / Matteo Samuele Pizzuto / Sonja Bernasconi Guastalla / Giovanni Bona / Alessandra Franzetti Pellanda / Christian Garzoni / Wesley C Van Voorhis / Laura E Rosen / Gyorgy Snell / Amalio Telenti / Herbert W Virgin / Luca Piccoli / Davide Corti / David Veesler / |
PubMed Abstract | A novel variant of concern (VOC) named CAL.20C (B.1.427/B.1.429), which was originally detected in California, carries spike glycoprotein mutations S13I in the signal peptide, W152C in the N-terminal ...A novel variant of concern (VOC) named CAL.20C (B.1.427/B.1.429), which was originally detected in California, carries spike glycoprotein mutations S13I in the signal peptide, W152C in the N-terminal domain (NTD), and L452R in the receptor-binding domain (RBD). Plasma from individuals vaccinated with a Wuhan-1 isolate-based messenger RNA vaccine or from convalescent individuals exhibited neutralizing titers that were reduced 2- to 3.5-fold against the B.1.427/B.1.429 variant relative to wild-type pseudoviruses. The L452R mutation reduced neutralizing activity in 14 of 34 RBD-specific monoclonal antibodies (mAbs). The S13I and W152C mutations resulted in total loss of neutralization for 10 of 10 NTD-specific mAbs because the NTD antigenic supersite was remodeled by a shift of the signal peptide cleavage site and the formation of a new disulfide bond, as revealed by mass spectrometry and structural studies. |
External links | Science / PubMed:34210893 / PubMed Central |
Methods | EM (single particle) |
Resolution | 2.3 - 3.0 Å |
Structure data | EMDB-24236, PDB-7n8h: EMDB-24237, PDB-7n8i: |
Chemicals | ChemComp-NAG: ChemComp-HOH: |
Source |
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Keywords | VIRAL PROTEIN/IMMUNE SYSTEM / coronavirus / antibody / california / Structural Genomics / Seattle Structural Genomics Center for Infectious Disease / SSGCID / VIRAL PROTEIN / VIRAL PROTEIN-IMMUNE SYSTEM complex |