1LUZ

Crystal Structure of the K3L Protein From Vaccinia Virus (Wisconsin Strain)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.232 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

X-ray crystal structure and functional analysis of vaccinia virus K3L reveals molecular determinants for PKR subversion and substrate recognition.

Dar, A.C.Sicheri, F.

(2002) Mol.Cell 10: 295-305


  • PubMed Abstract: 
  • The vaccinia virus protein K3L subverts the mammalian antiviral defense mechanism by inhibiting the RNA-dependent protein kinase PKR. K3L is a structural mimic of PKR's natural substrate, the translation initiation factor eIF2alpha. To further our un ...

    The vaccinia virus protein K3L subverts the mammalian antiviral defense mechanism by inhibiting the RNA-dependent protein kinase PKR. K3L is a structural mimic of PKR's natural substrate, the translation initiation factor eIF2alpha. To further our understanding of K3L inhibitory function and PKR substrate recognition, we have solved the 1.8 A X-ray crystal structure of K3L. The structure consists of a five-strand beta barrel with an intervening helix insert region similar in topology to the functionally divergent S1 domain. Mutational analysis identifies two proximal regions of the K3L structure as possessing specialized PKR binding and inhibitory function. Further analysis reveals that PKR dimerization composes a key switch that regulates both its catalytic activation and its molecular recognition of K3L and eIF2alpha.


    Organizational Affiliation

    Program in Molecular Biology and Cancer, Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein K3
A, B
88Vaccinia virus (strain Western Reserve)N/A
Find proteins for P18378 (Vaccinia virus (strain Western Reserve))
Go to UniProtKB:  P18378
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.232 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 73.119α = 90.00
b = 49.580β = 100.69
c = 59.938γ = 90.00
Software Package:
Software NamePurpose
SHARPphasing
HKL-2000data reduction
SCALEPACKdata scaling
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2002-05-23 
  • Released Date: 2002-08-28 
  • Deposition Author(s): Dar, A.C., Sicheri, F.

Revision History 

  • Version 1.0: 2002-08-28
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance