2M4G

Solution structure of the Core Domain (11-85) of the Murine Norovirus VPg protein


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structures of the Compact Helical Core Domains of Feline Calicivirus and Murine Norovirus VPg Proteins.

Leen, E.N.Kwok, K.Y.Birtley, J.R.Simpson, P.J.Subba-Reddy, C.V.Chaudhry, Y.Sosnovtsev, S.V.Green, K.Y.Prater, S.N.Tong, M.Young, J.C.Chung, L.M.Marchant, J.Roberts, L.O.Kao, C.C.Matthews, S.Goodfellow, I.G.Curry, S.

(2013) J.Virol. 87: 5318-5330

  • DOI: 10.1128/JVI.03151-12
  • Primary Citation of Related Structures:  2M4H

  • PubMed Abstract: 
  • We report the solution structures of the VPg proteins from feline calicivirus (FCV) and murine norovirus (MNV), which have been determined by nuclear magnetic resonance spectroscopy. In both cases, the core of the protein adopts a compact helical str ...

    We report the solution structures of the VPg proteins from feline calicivirus (FCV) and murine norovirus (MNV), which have been determined by nuclear magnetic resonance spectroscopy. In both cases, the core of the protein adopts a compact helical structure flanked by flexible N and C termini. Remarkably, while the core of FCV VPg contains a well-defined three-helix bundle, the MNV VPg core has just the first two of these secondary structure elements. In both cases, the VPg cores are stabilized by networks of hydrophobic and salt bridge interactions. The Tyr residue in VPg that is nucleotidylated by the viral NS7 polymerase (Y24 in FCV, Y26 in MNV) occurs in a conserved position within the first helix of the core. Intriguingly, given its structure, VPg would appear to be unable to bind to the viral polymerase so as to place this Tyr in the active site without a major conformation change to VPg or the polymerase. However, mutations that destabilized the VPg core either had no effect on or reduced both the ability of the protein to be nucleotidylated and virus infectivity and did not reveal a clear structure-activity relationship. The precise role of the calicivirus VPg core in virus replication remains to be determined, but knowledge of its structure will facilitate future investigations.


    Organizational Affiliation

    Division of Cell and Molecular Biology, Department of Life Sciences, Imperial College London, London, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Murine Norovirus VPg protein
A
75Murine norovirus 1N/A
Find proteins for Q80J95 (Murine norovirus 1)
Go to UniProtKB:  Q80J95
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2M4G Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-03-27
    Type: Initial release
  • Version 1.1: 2013-05-08
    Type: Database references