Structure of the RecQ Catalytic Core bound to ATP-gamma-S

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.230 

wwPDB Validation   3D Report Full Report

Ligand Structure Quality Assessment 

This is version 1.5 of the entry. See complete history


High-resolution structure of the E. coli RecQ helicase catalytic core

Bernstein, D.A.Zittel, M.C.Keck, J.L.

(2003) EMBO J 22: 4910-4921

  • DOI: https://doi.org/10.1093/emboj/cdg500
  • Primary Citation of Related Structures:  
    1OYW, 1OYY

  • PubMed Abstract: 

    RecQ family helicases catalyze critical genome maintenance reactions in bacterial and eukaryotic cells, playing key roles in several DNA metabolic processes. Mutations in recQ genes are linked to genome instability and human disease. To define the physical basis of RecQ enzyme function, we have determined a 1.8 A resolution crystal structure of the catalytic core of Escherichia coli RecQ in its unbound form and a 2.5 A resolution structure of the core bound to the ATP analog ATPgammaS. The RecQ core comprises four conserved subdomains; two of these combine to form its helicase region, while the others form unexpected Zn(2+)-binding and winged-helix motifs. The structures reveal the molecular basis of missense mutations that cause Bloom's syndrome, a human RecQ-associated disease. Finally, based on findings from the structures, we propose a mechanism for RecQ activity that could explain its functional coordination with topoisomerase III.

  • Organizational Affiliation

    Department of Biomolecular Chemistry, 550 Medical Science Center, 1300 University Avenue, University of Wisconsin Medical School, Madison, WI 53706-1532, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ATP-dependent DNA helicase523Escherichia coliMutation(s): 0 
Gene Names: recQ
EC: 3.6.1
Find proteins for P15043 (Escherichia coli (strain K12))
Explore P15043 
Go to UniProtKB:  P15043
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP15043
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.230 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.591α = 90
b = 54.534β = 110.78
c = 78.686γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
CCP4data scaling

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-10-07
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-31
    Changes: Experimental preparation
  • Version 1.4: 2022-12-21
    Changes: Database references, Derived calculations
  • Version 1.5: 2023-09-20
    Changes: Data collection, Refinement description