Crystal structure of the KIX domain of human RECQL5 (domain-swapped dimer)

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Structural Mimicry in Transcription Regulation of Human RNA Polymerase II by the DNA Helicase Recql5

Kassube, S.A.Jinek, M.Fang, J.Tsutakawa, S.Nogales, E.

(2013) Nat Struct Mol Biol 20: 892

  • DOI: https://doi.org/10.1038/nsmb.2596
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    RECQL5 is a member of the highly conserved RecQ family of DNA helicases involved in DNA repair. RECQL5 interacts with RNA polymerase II (Pol II) and inhibits transcription of protein-encoding genes by an unknown mechanism. We show that RECQL5 contacts the Rpb1 jaw domain of Pol II at a site that overlaps with the binding site for the transcription elongation factor TFIIS. Our cryo-EM structure of elongating Pol II arrested in complex with RECQL5 shows that the RECQL5 helicase domain is positioned to sterically block elongation. The crystal structure of the RECQL5 KIX domain reveals similarities with TFIIS, and binding of RECQL5 to Pol II interferes with the ability of TFIIS to promote transcriptional read-through in vitro. Together, our findings reveal a dual mode of transcriptional repression by RECQL5 that includes structural mimicry of the Pol II-TFIIS interaction.

  • Organizational Affiliation

    Biophysics Graduate Group, University of California, Berkeley, California, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
111Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for O94762 (Homo sapiens)
Explore O94762 
Go to UniProtKB:  O94762
GTEx:  ENSG00000108469 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO94762
Sequence Annotations
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.67α = 90
b = 61.21β = 90
c = 81.65γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-06-12
    Type: Initial release
  • Version 1.1: 2013-06-19
    Changes: Atomic model, Database references
  • Version 1.2: 2013-07-17
    Changes: Database references
  • Version 1.3: 2019-11-13
    Changes: Data collection, Database references, Other