3AAF

Structure of WRN RQC domain bound to double-stranded DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.213 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural basis for DNA strand separation by the unconventional winged-helix domain of RecQ helicase WRN

Kitano, K.Kim, S.Y.Hakoshima, T.

(2010) Structure 18: 177-187

  • DOI: https://doi.org/10.1016/j.str.2009.12.011
  • Primary Citation of Related Structures:  
    3AAF

  • PubMed Abstract: 

    The RecQ family of DNA helicases including WRN (Werner syndrome protein) and BLM (Bloom syndrome protein) protects the genome against deleterious changes. Here we report the cocrystal structure of the RecQ C-terminal (RQC) domain of human WRN bound to a DNA duplex. In the complex, the RQC domain specifically interacted with a blunt end of the duplex and, surprisingly, unpaired a Watson-Crick base pair in the absence of an ATPase domain. The beta wing, an extended hairpin motif that is characteristic of winged-helix motifs, was used as a "separating knife" to wedge between the first and second base pairs, whereas the recognition helix, a principal component of helix-turn-helix motifs that are usually embedded within DNA grooves, was unprecedentedly excluded from the interaction. Our results demonstrate a function of the winged-helix motif central to the helicase reaction, establishing the first structural paradigm concerning the DNA structure-specific activities of the RecQ helicases.


  • Organizational Affiliation

    Structural Biology Laboratory, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan. kkitano@is.naist.jp


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Werner syndrome ATP-dependent helicase
A, B
134Homo sapiensMutation(s): 0 
EC: 3.6.1
UniProt & NIH Common Fund Data Resources
Find proteins for Q14191 (Homo sapiens)
Explore Q14191 
Go to UniProtKB:  Q14191
GTEx:  ENSG00000165392 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ14191
Sequence Annotations
Expand
  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains LengthOrganismImage
DNA (5'-D(*AP*CP*CP*CP*TP*AP*AP*TP*TP*AP*GP*GP*GP*T)-3')
C, D
14N/A
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.213 
  • Space Group: P 43 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.077α = 90
b = 84.077β = 90
c = 145.291γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SHARPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-02-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Refinement description, Version format compliance