2A1J

Crystal Structure of the Complex between the C-Terminal Domains of Human XPF and ERCC1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.241 

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This is version 1.2 of the entry. See complete history


Literature

Crystal structure and DNA binding functions of ERCC1, a subunit of the DNA structure-specific endonuclease XPF-ERCC1.

Tsodikov, O.V.Enzlin, J.H.Scharer, O.D.Ellenberger, T.

(2005) Proc Natl Acad Sci U S A 102: 11236-11241

  • DOI: 10.1073/pnas.0504341102
  • Primary Citation of Related Structures:  
    2A1I, 2A1J

  • PubMed Abstract: 
  • Human XPF-ERCC1 is a DNA endonuclease that incises a damaged DNA strand on the 5' side of a lesion during nucleotide excision repair and has additional role(s) in homologous recombination and DNA interstrand crosslink repair. We show that a truncated form of XPF lacking the N-terminal helicase-like domain in complex with ERCC1 exhibits a structure-specific endonuclease activity with similar specificity to that of full-length XPF-ERCC1 ...

    Human XPF-ERCC1 is a DNA endonuclease that incises a damaged DNA strand on the 5' side of a lesion during nucleotide excision repair and has additional role(s) in homologous recombination and DNA interstrand crosslink repair. We show that a truncated form of XPF lacking the N-terminal helicase-like domain in complex with ERCC1 exhibits a structure-specific endonuclease activity with similar specificity to that of full-length XPF-ERCC1. Two domains of ERCC1, a central domain and a C-terminal tandem helix-hairpin-helix (HhH2) dimerization domain, bind to ssDNA. The central domain of ERCC1 binds ssDNA/dsDNA junctions with a defined polarity, preferring a 5' single-stranded overhang. The XPF-ERCC1 HhH2 domain heterodimer contains two independent ssDNA-binding surfaces, which are revealed by a crystal structure of the protein complex. A crystal structure of the central domain of ERCC1 shows its fold is strikingly similar to that of the nuclease domains of the archaeal Mus81/XPF homologs, despite very low sequence homology. A groove lined with basic and aromatic residues on the surface of ERCC1 has apparently been adapted to interact with ssDNA. On the basis of these crystallographic and biochemical studies, we propose a model in which XPF-ERCC1 recognizes a branched DNA substrate by binding the two ssDNA arms with the two HhH2 domains of XPF and ERCC1 and by binding the 5'-ssDNA arm with the central domain of ERCC1.


    Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA repair endonuclease XPFA63Homo sapiensMutation(s): 0 
Gene Names: ERCC4ERCC11XPF
EC: 3.1
Find proteins for Q92889 (Homo sapiens)
Explore Q92889 
Go to UniProtKB:  Q92889
NIH Common Fund Data Resources
PHAROS:  Q92889
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DNA excision repair protein ERCC-1B91Homo sapiensMutation(s): 0 
Gene Names: ERCC1
Find proteins for P07992 (Homo sapiens)
Explore P07992 
Go to UniProtKB:  P07992
NIH Common Fund Data Resources
PHAROS:  P07992
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HG
Query on HG

Download Ideal Coordinates CCD File 
C [auth B]MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.241 
  • Space Group: P 32 1 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.848α = 90
b = 69.848β = 90
c = 104.109γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-08-02
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance