7SFW

CryoEM structure of Venezuelan Equine Encephalitis virus (VEEV) TC-83 strain VLP in complex with Fab hVEEV-63 (focus refine of the asymmetric unit)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Neutralizing antibodies protect mice against Venezuelan equine encephalitis virus aerosol challenge.

Kafai, N.M., Williamson, L.E., Binshtein, E., Sukupolvi-Petty, S., Gardner, C.L., Liu, J., Mackin, S., Kim, A.S., Kose, N., Carnahan, R.H., Jung, A., Droit, L., Reed, D.S., Handley, S.A., Klimstra, W.B., Crowe, J.E., Diamond, M.S.

(2022) J Exp Med 219

  • DOI: https://doi.org/10.1084/jem.20212532
  • Primary Citation of Related Structures:  
    7SFU, 7SFV, 7SFW

  • PubMed Abstract: 

    • Venezuelan equine encephalitis virus (VEEV) remains a risk for epidemic emergence or use as an aerosolized bioweapon. To develop possible countermeasures, we isolated VEEV-specific neutralizing monoclonal antibodies (mAbs) from mice and a human immunized with attenuated VEEV strains ...

    Venezuelan equine encephalitis virus (VEEV) remains a risk for epidemic emergence or use as an aerosolized bioweapon. To develop possible countermeasures, we isolated VEEV-specific neutralizing monoclonal antibodies (mAbs) from mice and a human immunized with attenuated VEEV strains. Functional assays and epitope mapping established that potently inhibitory anti-VEEV mAbs bind distinct antigenic sites in the A or B domains of the E2 glycoprotein and block multiple steps in the viral replication cycle including attachment, fusion, and egress. A 3.2-Å cryo-electron microscopy reconstruction of VEEV virus-like particles bound by a human Fab suggests that antibody engagement of the B domain may result in cross-linking of neighboring spikes to prevent conformational requirements for viral fusion. Prophylaxis or postexposure therapy with these mAbs protected mice against lethal aerosol challenge with VEEV. Our study defines functional and structural mechanisms of mAb protection and suggests that multiple antigenic determinants on VEEV can be targeted for vaccine or antibody-based therapeutic development.

    Organizational Affiliation: 

    The Andrew M. and Jane M. Bursky Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Spike glycoprotein E1
A, D, G, J
442Venezuelan equine encephalitis virus (strain TC-83)Mutation(s): 0 
EC: 3.4.21.90
Membrane Entity: Yes 
UniProt
Find proteins for P05674 (Venezuelan equine encephalitis virus (strain TC-83))
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Go to UniProtKB:  P05674
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05674
Protein Feature View
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Spike glycoprotein E2
B, E, H, K
423Venezuelan equine encephalitis virus (strain TC-83)Mutation(s): 0 
EC: 3.4.21.90
Membrane Entity: Yes 
UniProt
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Go to UniProtKB:  P05674
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UniProt GroupP05674
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Capsid protein
C, F, I, L
275Venezuelan equine encephalitis virus (strain TC-83)Mutation(s): 0 
EC: 3.4.21.90
Membrane Entity: Yes 
UniProt
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Go to UniProtKB:  P05674
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UniProt GroupP05674
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
hVEEV-63 Fab heavy chain
M, O, Q, S
122Homo sapiensMutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
hVEEV-63 Fab light chain
N, P, R, T
107Homo sapiensMutation(s): 0 
Entity Groups  
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX
RECONSTRUCTIONRELION3.1

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 StatesU19 AI142790

Revision History  (Full details and data files)

  • Version 1.0: 2022-03-16
    Type: Initial release
  • Version 1.1: 2022-07-06
    Changes: Database references