Journal: bioRxiv / Year: 2021 Title: Memory B cell repertoire for recognition of evolving SARS-CoV-2 spike. Authors: Pei Tong / Avneesh Gautam / Ian Windsor / Meghan Travers / Yuezhou Chen / Nicholas Garcia / Noah B Whiteman / Lindsay G A McKay / Felipe J N Lelis / Shaghayegh Habibi / Yongfei Cai / Linda J ...Authors: Pei Tong / Avneesh Gautam / Ian Windsor / Meghan Travers / Yuezhou Chen / Nicholas Garcia / Noah B Whiteman / Lindsay G A McKay / Felipe J N Lelis / Shaghayegh Habibi / Yongfei Cai / Linda J Rennick / W Paul Duprex / Kevin R McCarthy / Christy L Lavine / Teng Zuo / Junrui Lin / Adam Zuiani / Jared Feldman / Elizabeth A MacDonald / Blake M Hauser / Anthony Griffths / Michael S Seaman / Aaron G Schmidt / Bing Chen / Donna Neuberg / Goran Bajic / Stephen C Harrison / Duane R Wesemann / Abstract: Memory B cell reserves can generate protective antibodies against repeated SARS-CoV-2 infections, but with an unknown reach from original infection to antigenically drifted variants. We charted ...Memory B cell reserves can generate protective antibodies against repeated SARS-CoV-2 infections, but with an unknown reach from original infection to antigenically drifted variants. We charted memory B cell receptor-encoded monoclonal antibodies (mAbs) from 19 COVID-19 convalescent subjects against SARS-CoV-2 spike (S) and found 7 major mAb competition groups against epitopes recurrently targeted across individuals. Inclusion of published and newly determined structures of mAb-S complexes identified corresponding epitopic regions. Group assignment correlated with cross-CoV-reactivity breadth, neutralization potency, and convergent antibody signatures. mAbs that competed for binding the original S isolate bound differentially to S variants, suggesting the protective importance of otherwise-redundant recognition. The results furnish a global atlas of the S-specific memory B cell repertoire and illustrate properties conferring robustness against emerging SARS-CoV-2 variants.
Entire : SARS-CoV-2 spike (2P) in complex with C12A2 Fab
Entire
Name: SARS-CoV-2 spike (2P) in complex with C12A2 Fab
Components
Complex: SARS-CoV-2 spike (2P) in complex with C12A2 Fab
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Supramolecule #1: SARS-CoV-2 spike (2P) in complex with C12A2 Fab
Supramolecule
Name: SARS-CoV-2 spike (2P) in complex with C12A2 Fab / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3 Details: B cell receptor was sequenced from memory B cell of SARS-CoV-2 convalescent human patient and express as Fab. SARS-CoV2-2 surface protein (with 2P stabilizing mutations) was expressed as soluble ectodomain.
Source (natural)
Organism: Severe acute respiratory syndrome coronavirus 2
Recombinant expression
Organism: Homo sapiens (human) / Recombinant strain: expi293F / Recombinant cell: human embryonic kidney / Recombinant plasmid: pVRC
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Experimental details
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Structure determination
Method
cryo EM
Processing
single particle reconstruction
Aggregation state
particle
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Sample preparation
Buffer
pH: 7.5 / Component:
Concentration
Name
Formula
10.0 mM
Tris
150.0 mM
NaCl
Vitrification
Cryogen name: ETHANE / Chamber humidity: 88 % / Chamber temperature: 298 K / Instrument: FEI VITROBOT MARK IV
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Electron microscopy
Microscope
FEI TITAN KRIOS
Image recording
Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average exposure time: 2.0 sec. / Average electron dose: 54.01 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
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