Structure of 2A protein from Theilers murine encephalomyelitis virus (TMEV)

Experimental Data Snapshot

  • Resolution: 1.87 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 

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Investigating molecular mechanisms of 2A-stimulated ribosomal pausing and frameshifting in Theilovirus.

Hill, C.H.Cook, G.M.Napthine, S.Kibe, A.Brown, K.Caliskan, N.Firth, A.E.Graham, S.C.Brierley, I.

(2021) Nucleic Acids Res 49: 11938-11958

  • DOI: https://doi.org/10.1093/nar/gkab969
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The 2A protein of Theiler's murine encephalomyelitis virus (TMEV) acts as a switch to stimulate programmed -1 ribosomal frameshifting (PRF) during infection. Here, we present the X-ray crystal structure of TMEV 2A and define how it recognises the stimulatory RNA element. We demonstrate a critical role for bases upstream of the originally predicted stem-loop, providing evidence for a pseudoknot-like conformation and suggesting that the recognition of this pseudoknot by beta-shell proteins is a conserved feature in cardioviruses. Through examination of PRF in TMEV-infected cells by ribosome profiling, we identify a series of ribosomal pauses around the site of PRF induced by the 2A-pseudoknot complex. Careful normalisation of ribosomal profiling data with a 2A knockout virus facilitated the identification, through disome analysis, of ribosome stacking at the TMEV frameshifting signal. These experiments provide unparalleled detail of the molecular mechanisms underpinning Theilovirus protein-stimulated frameshifting.

  • Organizational Affiliation

    Division of Virology, Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QP, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Capsid protein VP0138Theiler's murine encephalomyeltits virus GDVIIMutation(s): 0 
EC: (PDB Primary Data), (PDB Primary Data)
Find proteins for P08545 (Theiler's murine encephalomyelitis virus (strain GDVII))
Explore P08545 
Go to UniProtKB:  P08545
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08545
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on BR

Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 1.87 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 
  • Space Group: P 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.788α = 90
b = 73.788β = 90
c = 73.788γ = 90
Software Package:
Software NamePurpose
Cootmodel building
ARP/wARPmodel building
Aimlessdata scaling
DIALSdata reduction
XDSdata reduction
xia2data reduction
GDAdata collection

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom202797/Z/16/Z
Wellcome TrustUnited Kingdom098406/Z/12/B

Revision History  (Full details and data files)

  • Version 1.0: 2021-12-08
    Type: Initial release