2FBY

WRN exonuclease, Eu complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.221 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

WRN exonuclease structure and molecular mechanism imply an editing role in DNA end processing.

Perry, J.J., Yannone, S.M., Holden, L.G., Hitomi, C., Asaithamby, A., Han, S., Cooper, P.K., Chen, D.J., Tainer, J.A.

(2006) Nat Struct Mol Biol 13: 414-422

  • DOI: 10.1038/nsmb1088
  • Primary Citation of Related Structures:  
    2FBT, 2FC0, 2FBY, 2FBX, 2FBV

  • PubMed Abstract: 

    • WRN is unique among the five human RecQ DNA helicases in having a functional exonuclease domain (WRN-exo) and being defective in the premature aging and cancer-related disorder Werner syndrome. Here, we characterize WRN-exo crystal structures, biochemical activity and participation in DNA end joining ...

    WRN is unique among the five human RecQ DNA helicases in having a functional exonuclease domain (WRN-exo) and being defective in the premature aging and cancer-related disorder Werner syndrome. Here, we characterize WRN-exo crystal structures, biochemical activity and participation in DNA end joining. Metal-ion complex structures, active site mutations and activity assays reveal a nuclease mechanism mediated by two metal ions. The DNA end-binding Ku70/80 complex specifically stimulates WRN-exo activity, and structure-based mutational inactivation of WRN-exo alters DNA end joining in human cells. We furthermore establish structural and biochemical similarities of WRN-exo to DnaQ-family replicative proofreading exonucleases, describing WRN-specific adaptations consistent with double-stranded DNA specificity and functionally important conformational changes. These results indicate WRN-exo is a human DnaQ family member and support DnaQ-like proofreading activities stimulated by Ku70/80, with implications for WRN functions in age-related pathologies and maintenance of genomic integrity.

    Organizational Affiliation: 

    Department of Molecular Biology and Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California 92037, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Werner syndrome helicaseA205Homo sapiensMutation(s): 0 
Gene Names: WRN, RECQ3, RECQL2
EC: 2.7.7 (PDB Primary Data), 3.6.4.12 (UniProt), 3.1 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q14191 (Homo sapiens)
Explore Q14191 
Go to UniProtKB:  Q14191
PHAROS:  Q14191
GTEx:  ENSG00000165392
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EU3
Query on EU3
Download Ideal Coordinates CCD File 
 B [auth A], C [auth A]EUROPIUM (III) ION
Eu
LNBHUCHAFZUEGJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.221 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.089α = 90
b = 80.089β = 90
c = 92.97γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
AMoREphasing
CNSrefinement
HKL-2000data reduction

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2005-12-10 
  • Released Date: 2006-04-25 
    • Deposition Author(s): Perry, J.J.

Revision History  (Full details and data files)

  • Version 1.0: 2006-04-25
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance