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- PDB-7ch5: Crystal structure of the SARS-CoV-2 S RBD in complex with BD-629 Fab -

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Basic information

Entry
Database: PDB / ID: 7ch5
TitleCrystal structure of the SARS-CoV-2 S RBD in complex with BD-629 Fab
Components
  • BD-629 Fab H
  • BD-629 Fab L
  • Spike protein S1
KeywordsPROTEIN BINDING/IMMUNE SYSTEM / Complex / PROTEIN BINDING-IMMUNE SYSTEM complex
Function / homology
Function and homology information


Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell ...Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell / membrane fusion / Attachment and Entry / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / receptor ligand activity / endocytosis involved in viral entry into host cell / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / SARS-CoV-2 activates/modulates innate and adaptive immune responses / host cell plasma membrane / virion membrane / identical protein binding / membrane / plasma membrane
Similarity search - Function
Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal / Spike glycoprotein, betacoronavirus / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus ...Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal / Spike glycoprotein, betacoronavirus / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / Spike glycoprotein S2, coronavirus, heptad repeat 1 / Spike glycoprotein S2, coronavirus, heptad repeat 2 / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 1 (HR1) region profile. / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 2 (HR2) region profile. / Spike glycoprotein S2 superfamily, coronavirus / Spike glycoprotein S2, coronavirus / Coronavirus spike glycoprotein S2 / Immunoglobulins / Immunoglobulin-like / Sandwich / Mainly Beta
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
Severe acute respiratory syndrome coronavirus 2
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.7 Å
AuthorsDu, S. / Xiao, J.Y.
CitationJournal: Cell / Year: 2020
Title: Structurally Resolved SARS-CoV-2 Antibody Shows High Efficacy in Severely Infected Hamsters and Provides a Potent Cocktail Pairing Strategy.
Authors: Shuo Du / Yunlong Cao / Qinyu Zhu / Pin Yu / Feifei Qi / Guopeng Wang / Xiaoxia Du / Linlin Bao / Wei Deng / Hua Zhu / Jiangning Liu / Jianhui Nie / Yinghui Zheng / Haoyu Liang / Ruixue Liu ...Authors: Shuo Du / Yunlong Cao / Qinyu Zhu / Pin Yu / Feifei Qi / Guopeng Wang / Xiaoxia Du / Linlin Bao / Wei Deng / Hua Zhu / Jiangning Liu / Jianhui Nie / Yinghui Zheng / Haoyu Liang / Ruixue Liu / Shuran Gong / Hua Xu / Ayijiang Yisimayi / Qi Lv / Bo Wang / Runsheng He / Yunlin Han / Wenjie Zhao / Yali Bai / Yajin Qu / Xiang Gao / Chenggong Ji / Qisheng Wang / Ning Gao / Weijin Huang / Youchun Wang / X Sunney Xie / Xiao-Dong Su / Junyu Xiao / Chuan Qin /
Abstract: Understanding how potent neutralizing antibodies (NAbs) inhibit SARS-CoV-2 is critical for effective therapeutic development. We previously described BD-368-2, a SARS-CoV-2 NAb with high potency; ...Understanding how potent neutralizing antibodies (NAbs) inhibit SARS-CoV-2 is critical for effective therapeutic development. We previously described BD-368-2, a SARS-CoV-2 NAb with high potency; however, its neutralization mechanism is largely unknown. Here, we report the 3.5-Å cryo-EM structure of BD-368-2/trimeric-spike complex, revealing that BD-368-2 fully blocks ACE2 recognition by occupying all three receptor-binding domains (RBDs) simultaneously, regardless of their "up" or "down" conformations. Also, BD-368-2 treats infected adult hamsters at low dosages and at various administering windows, in contrast to placebo hamsters that manifested severe interstitial pneumonia. Moreover, BD-368-2's epitope completely avoids the common binding site of VH3-53/VH3-66 recurrent NAbs, evidenced by tripartite co-crystal structures with RBDs. Pairing BD-368-2 with a potent recurrent NAb neutralizes SARS-CoV-2 pseudovirus at pM level and rescues mutation-induced neutralization escapes. Together, our results rationalized a new RBD epitope that leads to high neutralization potency and demonstrated BD-368-2's therapeutic potential in treating COVID-19.
History
DepositionJul 5, 2020Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Sep 16, 2020Provider: repository / Type: Initial release
Revision 1.1Oct 7, 2020Group: Database references / Category: citation / citation_author
Item: _citation.journal_abbrev / _citation.journal_id_CSD ..._citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year
Revision 1.2Nov 25, 2020Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.3Mar 10, 2021Group: Structure summary / Category: entity / entity_name_com / Item: _entity.pdbx_description / _entity_name_com.name
Revision 1.4Nov 29, 2023Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 1.5Nov 6, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
H: BD-629 Fab H
L: BD-629 Fab L
R: Spike protein S1


Theoretical massNumber of molelcules
Total (without water)72,1713
Polymers72,1713
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area5190 Å2
ΔGint-21 kcal/mol
Surface area27040 Å2
MethodPISA
Unit cell
Length a, b, c (Å)56.049, 102.347, 164.822
Angle α, β, γ (deg.)90.000, 90.000, 90.000
Int Tables number19
Space group name H-MP212121

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Components

#1: Antibody BD-629 Fab H


Mass: 23774.537 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Cell line (production host): 293F / Production host: Homo sapiens (human)
#2: Antibody BD-629 Fab L


Mass: 23273.830 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Cell line (production host): 293F / Production host: Homo sapiens (human)
#3: Protein Spike protein S1 / S glycoprotein / E2 / Peplomer protein / Spike glycoprotein


Mass: 25122.336 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Severe acute respiratory syndrome coronavirus 2
Gene: S, 2 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P0DTC2
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 3.28 Å3/Da / Density % sol: 62.44 %
Crystal growTemperature: 293.15 K / Method: vapor diffusion, sitting drop
Details: 0.1 M Sodium citrate tribasic dihydrate pH 5.0 and 18% w/v Polyethylene glycol 20000

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Data collection

DiffractionMean temperature: 80 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: SSRF / Beamline: BL17U1 / Wavelength: 1 Å
DetectorType: ADSC QUANTUM 315 / Detector: CCD / Date: Jun 25, 2020
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 2.7→50 Å / Num. obs: 26831 / % possible obs: 100 % / Redundancy: 12.2 % / CC1/2: 0.993 / Net I/σ(I): 13.78
Reflection shellResolution: 2.7→2.75 Å / Num. unique obs: 1283 / CC1/2: 0.906

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Processing

Software
NameVersionClassification
PHENIX1.18.2_3874refinement
PDB_EXTRACT3.25data extraction
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 6M0J

6m0j


Resolution: 2.7→49.16 Å / SU ML: 0.34 / Cross valid method: THROUGHOUT / σ(F): 1.36 / Phase error: 27.5 / Stereochemistry target values: ML
RfactorNum. reflection% reflection
Rfree0.2598 1337 5.01 %
Rwork0.2269 25376 -
obs0.2285 26713 99.55 %
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL
Displacement parametersBiso max: 99.7 Å2 / Biso mean: 44.8019 Å2 / Biso min: 20.49 Å2
Refinement stepCycle: final / Resolution: 2.7→49.16 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4687 0 0 0 4687
Num. residues----607
LS refinement shell

Refine-ID: X-RAY DIFFRACTION / Rfactor Rfree error: 0 / Total num. of bins used: 10

Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkNum. reflection all% reflection obs (%)
2.7-2.80.37321280.29592428255696
2.8-2.910.31741310.288824892620100
2.91-3.040.3841310.294924852616100
3.04-3.20.31021330.278425212654100
3.2-3.40.32841320.257425112643100
3.4-3.660.26451340.241125432677100
3.66-4.030.22531340.221825442678100
4.03-4.620.20671340.178825462680100
4.62-5.810.20291370.174225912728100
5.82-49.160.23681430.211627182861100

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