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TitleSARS-CoV-2 immune evasion by the B.1.427/B.1.429 variant of concern.
Journal, issue, pagesScience, Vol. 373, Issue 6555, Page 648-654, Year 2021
Publish dateAug 6, 2021
AuthorsMatthew 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 AbstractA 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 linksScience / PubMed:34210893 / PubMed Central
MethodsEM (single particle)
Resolution2.3 - 3.0 Å
Structure data

24236

7n8h

EMDB-24236, PDB-7n8h:
SARS-CoV-2 S (B.1.429 / epsilon variant) + S2M11 + S2L20 Global Refinement
Method: EM (single particle) / Resolution: 2.3 Å

24237

7n8i

EMDB-24237, PDB-7n8i:
SARS-CoV-2 S (B.1.429 / epsilon variant) + S2M11 + S2L20 (Local Refinement of the NTD/S2L20)
Method: EM (single particle) / Resolution: 3.0 Å

Chemicals

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose / N-Acetylglucosamine

ChemComp-HOH:
WATER / Water

Source
  • homo sapiens (human)
  • severe acute respiratory syndrome coronavirus 2
KeywordsVIRAL PROTEIN/IMMUNE SYSTEM / coronavirus / antibody / california / Structural Genomics / Seattle Structural Genomics Center for Infectious Disease / SSGCID / VIRAL PROTEIN / VIRAL PROTEIN-IMMUNE SYSTEM complex

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