2FBV

WRN exonuclease, Mn complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.237 

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:  

  • 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, bioche ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Werner syndrome helicase
A
205Homo sapiensMutation(s): 0 
Gene Names: WRN (RECQ3, RECQL2)
EC: 3.6.4.12
Find proteins for Q14191 (Homo sapiens)
Go to Gene View: WRN
Go to UniProtKB:  Q14191
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.237 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 80.971α = 90.00
b = 80.971β = 90.00
c = 93.184γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
HKL-2000data collection
AMoREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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

Revision History 

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