8C6D

Production of antigenically stable enterovirus A71 virus-like particles in Pichia pastoris as a vaccine candidate.


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.40 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

Production of antigenically stable enterovirus A71 virus-like particles in Pichia pastoris as a vaccine candidate.

Kingston, N.J.Snowden, J.S.Martyna, A.Shegdar, M.Grehan, K.Tedcastle, A.Pegg, E.Fox, H.Macadam, A.J.Martin, J.Hogle, J.M.Rowlands, D.J.Stonehouse, N.J.

(2023) bioRxiv 

  • DOI: https://doi.org/10.1101/2023.01.30.526315
  • Primary Citation of Related Structures:  
    8C6D

  • PubMed Abstract: 

    Enterovirus A71 (EVA71) causes widespread disease in young children with occasional fatal consequences. In common with other picornaviruses, both empty capsids (ECs) and infectious virions are produced during the viral lifecycle. While initially antigenically indistinguishable from virions, ECs readily convert to an expanded conformation at moderate temperatures. In the closely related poliovirus, these conformational changes result in loss of antigenic sites required to elicit protective immune responses. Whether this is true for EVA71 remains to be determined and is the subject of this investigation. We previously reported the selection of a thermally resistant EVA71 genogroup B2 population using successive rounds of heating and passage. The mutations found in the structural protein-coding region of the selected population conferred increased thermal stability to both virions and naturally produced ECs. Here, we introduced these mutations into a recombinant expression system to produce stabilised virus-like particles (VLPs) in Pichia pastoris . The stabilised VLPs retain the native virion-like antigenic conformation as determined by reactivity with a specific antibody. Structural studies suggest multiple potential mechanisms of antigenic stabilisation, however, unlike poliovirus, both native and expanded EVA71 particles elicited antibodies able to directly neutralise virus in vitro . Therefore, the anti-EVA71 neutralising antibodies are elicited by sites which are not canonically associated with the native conformation, but whether antigenic sites specific to the native conformation provide additional protective responses in vivo remains unclear. VLPs are likely to provide cheaper and safer alternatives for vaccine production and these data show that VLP vaccines are comparable with inactivated virus vaccines at inducing neutralising antibodies.


  • Organizational Affiliation

    Astbury Centre for Structural Molecular Biology, School of Molecular & Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Genome polyprotein297Enterovirus A71Mutation(s): 0 
EC: 3.4.22.29 (PDB Primary Data), 3.6.1.15 (PDB Primary Data), 3.4.22.28 (PDB Primary Data), 2.7.7.48 (PDB Primary Data)
UniProt
Find proteins for Q66479 (Human enterovirus 71 (strain 7423/MS/87))
Explore Q66479 
Go to UniProtKB:  Q66479
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ66479
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Genome polyprotein (Fragment)323Enterovirus A71Mutation(s): 0 
UniProt
Find proteins for Q66479 (Human enterovirus 71 (strain 7423/MS/87))
Explore Q66479 
Go to UniProtKB:  Q66479
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ66479
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Genome polyprotein242Enterovirus A71Mutation(s): 0 
UniProt
Find proteins for Q66479 (Human enterovirus 71 (strain 7423/MS/87))
Explore Q66479 
Go to UniProtKB:  Q66479
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ66479
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
SQS (Subject of Investigation/LOI)
Query on SQS

Download Ideal Coordinates CCD File 
D [auth A](2S,3R,4E)-2-aminooctadec-4-ene-1,3-diol
C18 H37 N O2
WWUZIQQURGPMPG-KRWOKUGFSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.40 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (MRC, United Kingdom)United KingdomMR/P022626/1
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI 169457-0
Leverhulme TrustUnited Kingdom--
Wellcome TrustUnited Kingdom204825/Z/16/Z
Wellcome TrustUnited Kingdom102174/B/13/Z

Revision History  (Full details and data files)

  • Version 1.0: 2023-02-22
    Type: Initial release
  • Version 1.1: 2024-07-24
    Changes: Data collection