2K36

Structure ensemble Backbone and side-chain 1H, 13C, and 15N Chemical Shift Assignments, 1H-15N RDCs and 1H-1H nOe restraints for protein K7 from the Vaccinia virus


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy (tangled structures excluded) 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Poxvirus K7 protein adopts a Bcl-2 fold: biochemical mapping of its interactions with human DEAD box RNA helicase DDX3.

Kalverda, A.P.Thompson, G.S.Vogel, A.Schroder, M.Bowie, A.G.Khan, A.R.Homans, S.W.

(2009) J.Mol.Biol. 385: 843-853

  • DOI: 10.1016/j.jmb.2008.09.048

  • PubMed Abstract: 
  • Poxviruses have evolved numerous strategies to evade host innate immunity. Vaccinia virus K7 is a 149-residue protein with previously unknown structure that is highly conserved in the orthopoxvirus family. K7 bears sequence and functional similaritie ...

    Poxviruses have evolved numerous strategies to evade host innate immunity. Vaccinia virus K7 is a 149-residue protein with previously unknown structure that is highly conserved in the orthopoxvirus family. K7 bears sequence and functional similarities to A52, which interacts with interleukin receptor-associated kinase 2 and tumor necrosis factor receptor-associated factor 6 to suppress nuclear factor kappaB activation and to stimulate the secretion of the anti-inflammatory cytokine interleukin-10. In contrast to A52, K7 forms a complex with DEAD box RNA helicase DDX3, thereby suppressing DDX3-mediated ifnb promoter induction. We determined the NMR solution structure of K7 to provide insight into the structural basis for poxvirus antagonism of innate immune signaling. The structure reveals an alpha-helical fold belonging to the Bcl-2 family despite an unrelated primary sequence. NMR chemical-shift mapping studies have localized the binding surface for DDX3 on a negatively charged face of K7. Furthermore, thermodynamic studies have mapped the K7-binding region to a 30-residue N-terminal fragment of DDX3, ahead of the core RNA helicase domains.


    Organizational Affiliation

    Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein K7
A
149Vaccinia virus (strain Western Reserve)N/A
Find proteins for P68466 (Vaccinia virus (strain Western Reserve))
Go to UniProtKB:  P68466
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy (tangled structures excluded) 
  • Olderado: 2K36 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-10-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance