3II6

Structure of human Xrcc4 in complex with the tandem BRCT domains of DNA LigaseIV.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.240 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and functional interaction between the human DNA repair proteins DNA ligase IV and XRCC4

Wu, P.Y.Frit, P.Meesala, S.Dauvillier, S.Modesti, M.Andres, S.N.Huang, Y.Sekiguchi, J.Calsou, P.Salles, B.Junop, M.S.

(2009) MOL.CELL.BIOL. 11: 3163-3172

  • DOI: 10.1128/MCB.01895-08

  • PubMed Abstract: 
  • Nonhomologous end-joining represents the major pathway used by human cells to repair DNA double-strand breaks. It relies on the XRCC4/DNA ligase IV complex to reseal DNA strands. Here we report the high-resolution crystal structure of human XRCC4 bou ...

    Nonhomologous end-joining represents the major pathway used by human cells to repair DNA double-strand breaks. It relies on the XRCC4/DNA ligase IV complex to reseal DNA strands. Here we report the high-resolution crystal structure of human XRCC4 bound to the carboxy-terminal tandem BRCT repeat of DNA ligase IV. The structure differs from the homologous Saccharomyces cerevisiae complex and reveals an extensive DNA ligase IV binding interface formed by a helix-loop-helix structure within the inter-BRCT linker region, as well as significant interactions involving the second BRCT domain, which induces a kink in the tail region of XRCC4. We further demonstrate that interaction with the second BRCT domain of DNA ligase IV is necessary for stable binding to XRCC4 in cells, as well as to achieve efficient dominant-negative effects resulting in radiosensitization after ectopic overexpression of DNA ligase IV fragments in human fibroblasts. Together our findings provide unanticipated insight for understanding the physical and functional architecture of the nonhomologous end-joining ligation complex.


    Organizational Affiliation

    CNRS, IPBS (Institut de Pharmacologie et de Biologie Structurale), Toulouse, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA repair protein XRCC4
A, B, C, D
203Homo sapiensMutation(s): 2 
Gene Names: XRCC4
Find proteins for Q13426 (Homo sapiens)
Go to Gene View: XRCC4
Go to UniProtKB:  Q13426
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
DNA ligase 4
X, Y
263Homo sapiensMutation(s): 0 
Gene Names: LIG4
EC: 6.5.1.1
Find proteins for P49917 (Homo sapiens)
Go to Gene View: LIG4
Go to UniProtKB:  P49917
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
Y
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.240 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 67.243α = 67.34
b = 85.982β = 82.86
c = 111.608γ = 74.52
Software Package:
Software NamePurpose
CNSphasing
d*TREKdata scaling
CNSrefinement
CrystalCleardata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2009-07-31 
  • Released Date: 2009-08-11 
  • Deposition Author(s): Meesala, S., Junop, M.

Revision History 

  • Version 1.0: 2009-08-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance