1JJG

Solution Structure of Myxoma Virus Protein M156R


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 20 
  • Selection Criteria: all calculated structures submitted 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Myxoma virus immunomodulatory protein M156R is a structural mimic of eukaryotic translation initiation factor eIF2alpha.

Ramelot, T.A.Cort, J.R.Yee, A.A.Liu, F.Goshe, M.B.Edwards, A.M.Smith, R.D.Arrowsmith, C.H.Dever, T.E.Kennedy, M.A.

(2002) J.Mol.Biol. 322: 943-954


  • PubMed Abstract: 
  • Phosphorylation of the translation initiation factor eIF2 on Ser51 of its alpha subunit is a key event for regulation of protein synthesis in all eukaryotes. M156R, the product of the myxoma virus M156R open reading frame, has sequence similarity to ...

    Phosphorylation of the translation initiation factor eIF2 on Ser51 of its alpha subunit is a key event for regulation of protein synthesis in all eukaryotes. M156R, the product of the myxoma virus M156R open reading frame, has sequence similarity to eIF2alpha as well as to a family of viral proteins that bind to the interferon-induced protein kinase PKR and inhibit phosphorylation of eIF2alpha. In this study, we demonstrate that, like eIF2alpha. M156R is an efficient substrate for phosphorylation by PKR and can compete with eIF2alpha. To gain insights into the substrate specificity of the eIF2alpha kinases, we have determined the nuclear magnetic resonance (NMR) structure of M156R, the first structure of a myxoma virus protein. The fold consists of a five-stranded antiparallel beta-barrel with two of the strands connected by a loop and an alpha-helix. The similarity between M156R and the beta-barrel structure in the N terminus of eIF2alpha suggests that the viral homologs mimic eIF2alpha structure in order to compete for binding to PKR. A homology-modeled structure of the well-studied vaccinia virus K3L was generated on the basis of alignment with M156R. Comparison of the structures of the K3L model, M156R, and human eIF2alpha indicated that residues important for binding to PKR are located at conserved positions on the surface of the beta-barrel and in the mobile loop, identifying the putative PKR recognition motif.


    Related Citations: 
    • An NMR Approach to Structural Proteomics
      Yee, A.,Chang, X.,Pineda-Lucena, A.,Wu, B.,Semesi, A.,Le, B.,Ramelot, T.,Lee, G.M.,Bhattacharyya, S.,Gutierrez, P.,Denisov, A.,Lee, C.-H.,Cort, J.R.,Kozlov, G.,Liao, J.,Finak, G.,Chen, L.,Wishart, D.,Lee, W.,McIntosh, L.P.,Kalle Gehring, K.,Kennedy, M.A.,Edwards, A.M.,Arrowsmith, C.H.
      (2002) Proc.Natl.Acad.Sci.USA 99: 1825


    Organizational Affiliation

    Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99352, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
M156R
A
102Myxoma virus (strain Lausanne)Gene Names: m156R
Find proteins for Q9Q8E9 (Myxoma virus (strain Lausanne))
Go to UniProtKB:  Q9Q8E9
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 20 
  • Selection Criteria: all calculated structures submitted 
  • Olderado: 1JJG Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-03-06
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance