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- EMDB-31250: Local map of S protein of SARS-CoV-2 in complex with GW01 Focused... -

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Entry
Database: EMDB / ID: EMD-31250
TitleLocal map of S protein of SARS-CoV-2 in complex with GW01 Focused on RND-GW01 sub_complex
Map data
Sample
  • Complex: Local map of S protein of SARS-CoV-2 in complex with GW01 Focused on RND-GW01 sub_complex
Biological speciesSevere acute respiratory syndrome coronavirus 2
Methodsingle particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsShen YP / Zhang YY
Funding support China, 3 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)31971123 China
National Natural Science Foundation of China (NSFC)81920108015 China
National Natural Science Foundation of China (NSFC)31930059 China
CitationJournal: Cell Discov / Year: 2022
Title: Novel sarbecovirus bispecific neutralizing antibodies with exceptional breadth and potency against currently circulating SARS-CoV-2 variants and sarbecoviruses.
Authors: Yingdan Wang / Meiqin Liu / Yaping Shen / Yunping Ma / Xiang Li / Yuanyuan Zhang / Mei Liu / Xing-Lou Yang / Jun Chen / Renhong Yan / Die Luan / Yanqun Wang / Ying Chen / Qimin Wang / ...Authors: Yingdan Wang / Meiqin Liu / Yaping Shen / Yunping Ma / Xiang Li / Yuanyuan Zhang / Mei Liu / Xing-Lou Yang / Jun Chen / Renhong Yan / Die Luan / Yanqun Wang / Ying Chen / Qimin Wang / Haofeng Lin / Yaning Li / Kaiyue Wu / Tongyu Zhu / Jincun Zhao / Hongzhou Lu / Yumei Wen / Shibo Jiang / Fan Wu / Qiang Zhou / Zheng-Li Shi / Jinghe Huang /
Abstract: The emergence of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) variants of concern, including Alpha (B.1.1.7), Beta (B.1.351), Gamma (P.1), Delta (B.1.617.2), and Omicron (B.1.1.529) ...The emergence of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) variants of concern, including Alpha (B.1.1.7), Beta (B.1.351), Gamma (P.1), Delta (B.1.617.2), and Omicron (B.1.1.529) has aroused concerns over their increased infectivity and transmissibility, as well as decreased sensitivity to SARS-CoV-2-neutralizing antibodies (NAbs) and the current coronavirus disease 2019 (COVID-19) vaccines. Such exigencies call for the development of pan-sarbecovirus vaccines or inhibitors to combat the circulating SARS-CoV-2 NAb-escape variants and other sarbecoviruses. In this study, we isolated a broadly NAb against sarbecoviruses named GW01 from a donor who recovered from COVID-19. Cryo-EM structure and competition assay revealed that GW01 targets a highly conserved epitope in a wide spectrum of different sarbecoviruses. However, we found that GW01, the well-known sarbecovirus NAb S309, and the potent SARS-CoV-2 NAbs CC12.1 and REGN10989 only neutralize about 90% of the 56 tested currently circulating variants of SARS-CoV-2 including Omicron. Therefore, to improve efficacy, we engineered an IgG-like bispecific antibody GW01-REGN10989 (G9) consisting of single-chain antibody fragments (scFv) of GW01 and REGN10989. We found that G9 could neutralize 100% of NAb-escape mutants (23 out of 23), including Omicron variant, with a geometric mean (GM) 50% inhibitory concentration of 8.8 ng/mL. G9 showed prophylactic and therapeutic effects against SARS-CoV-2 infection of both the lung and brain in hACE2-transgenic mice. Site-directed mutagenesis analyses revealed that GW01 and REGN10989 bind to the receptor-binding domain in different epitopes and from different directions. Since G9 targets the epitopes for both GW01 and REGN10989, it was effective against variants with resistance to GW01 or REGN10989 alone and other NAb-escape variants. Therefore, this novel bispecific antibody, G9, is a strong candidate for the treatment and prevention of infection by SARS-CoV-2, NAb-escape variants, and other sarbecoviruses that may cause future emerging or re-emerging coronavirus diseases.
History
DepositionApr 28, 2021-
Header (metadata) releaseMay 4, 2022-
Map releaseMay 4, 2022-
UpdateMay 11, 2022-
Current statusMay 11, 2022Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_31250.png

Downloads & links

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Map

FileDownload / File: emd_31250.map.gz / Format: CCP4 / Size: 91.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.087 Å
Density
Contour LevelBy AUTHOR: 0.025
Minimum - Maximum-0.04582652 - 0.08697805
Average (Standard dev.)0.00023983253 (±0.002082798)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions288288288
Spacing288288288
CellA=B=C: 313.056 Å
α=β=γ: 90.0 °

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Supplemental data

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Sample components

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Entire : Local map of S protein of SARS-CoV-2 in complex with GW01 Focused...

EntireName: Local map of S protein of SARS-CoV-2 in complex with GW01 Focused on RND-GW01 sub_complex
Components
  • Complex: Local map of S protein of SARS-CoV-2 in complex with GW01 Focused on RND-GW01 sub_complex

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Supramolecule #1: Local map of S protein of SARS-CoV-2 in complex with GW01 Focused...

SupramoleculeName: Local map of S protein of SARS-CoV-2 in complex with GW01 Focused on RND-GW01 sub_complex
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Recombinant expressionOrganism: Homo sapiens (human)

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 8
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0.6) / Number images used: 203736

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