8DTT

Crystal structure of SARS-CoV-2 spike stem helix peptide in complex with neutralizing antibody COV93-03


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.196 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Rare, convergent antibodies targeting the stem helix broadly neutralize diverse betacoronaviruses.

Dacon, C.Peng, L.Lin, T.H.Tucker, C.Lee, C.D.Cong, Y.Wang, L.Purser, L.Cooper, A.J.R.Williams, J.K.Pyo, C.W.Yuan, M.Kosik, I.Hu, Z.Zhao, M.Mohan, D.Peterson, M.Skinner, J.Dixit, S.Kollins, E.Huzella, L.Perry, D.Byrum, R.Lembirik, S.Murphy, M.Zhang, Y.Yang, E.S.Chen, M.Leung, K.Weinberg, R.S.Pegu, A.Geraghty, D.E.Davidson, E.Doranz, B.J.Douagi, I.Moir, S.Yewdell, J.W.Schmaljohn, C.Crompton, P.D.Mascola, J.R.Holbrook, M.R.Nemazee, D.Wilson, I.A.Tan, J.

(2023) Cell Host Microbe 31: 97

  • DOI: https://doi.org/10.1016/j.chom.2022.10.010
  • Primary Citation of Related Structures:  
    8DTR, 8DTT, 8DTX

  • PubMed Abstract: 

    Humanity has faced three recent outbreaks of novel betacoronaviruses, emphasizing the need to develop approaches that broadly target coronaviruses. Here, we identify 55 monoclonal antibodies from COVID-19 convalescent donors that bind diverse betacoronavirus spike proteins. Most antibodies targeted an S2 epitope that included the K814 residue and were non-neutralizing. However, 11 antibodies targeting the stem helix neutralized betacoronaviruses from different lineages. Eight antibodies in this group, including the six broadest and most potent neutralizers, were encoded by IGHV1-46 and IGKV3-20. Crystal structures of three antibodies of this class at 1.5-1.75-Å resolution revealed a conserved mode of binding. COV89-22 neutralized SARS-CoV-2 variants of concern including Omicron BA.4/5 and limited disease in Syrian hamsters. Collectively, these findings identify a class of IGHV1-46/IGKV3-20 antibodies that broadly neutralize betacoronaviruses by targeting the stem helix but indicate these antibodies constitute a small fraction of the broadly reactive antibody response to betacoronaviruses after SARS-CoV-2 infection.


  • Organizational Affiliation

    Antibody Biology Unit, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
COV93-03 heavy chainA,
D [auth E]
218Homo sapiensMutation(s): 0 
Entity Groups  
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Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
COV93-03 light chainB,
E [auth F]
217Homo sapiensMutation(s): 0 
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Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
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  • Reference Sequence

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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Spike protein S2' stem helix peptideC [auth G],
F [auth J]
15Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
UniProt
Find proteins for P0DTC2 (Severe acute respiratory syndrome coronavirus 2)
Explore P0DTC2 
Go to UniProtKB:  P0DTC2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DTC2
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.196 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.855α = 90
b = 65.973β = 90
c = 197.651γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United States--
Bill & Melinda Gates FoundationUnited States--

Revision History  (Full details and data files)

  • Version 1.0: 2022-11-23
    Type: Initial release
  • Version 1.1: 2023-01-25
    Changes: Database references
  • Version 1.2: 2023-10-25
    Changes: Data collection, Refinement description