3LQC

X-ray crystal structure of oxidized XRCC1 bound to DNA pol beta Palm thumb domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.349 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.189 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Oxidation state of the XRCC1 N-terminal domain regulates DNA polymerase beta binding affinity.

Cuneo, M.J.London, R.E.

(2010) Proc.Natl.Acad.Sci.USA 107: 6805-6810

  • DOI: 10.1073/pnas.0914077107
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Formation of a complex between the XRCC1 N-terminal domain (NTD) and DNA polymerase beta (Pol beta) is central to base excision repair of damaged DNA. Two crystal forms of XRCC1-NTD complexed with Pol beta have been solved, revealing that the XRCC1-N ...

    Formation of a complex between the XRCC1 N-terminal domain (NTD) and DNA polymerase beta (Pol beta) is central to base excision repair of damaged DNA. Two crystal forms of XRCC1-NTD complexed with Pol beta have been solved, revealing that the XRCC1-NTD is able to adopt a redox-dependent alternate fold, characterized by a disulfide bond, and substantial variations of secondary structure, folding topology, and electrostatic surface. Although most of these structural changes occur distal to the interface, the oxidized XRCC1-NTD forms additional interactions with Pol beta, enhancing affinity by an order of magnitude. Transient disulfide bond formation is increasingly recognized as an important molecular regulatory mechanism. The results presented here suggest a paradigm in DNA repair in which the redox state of a scaffolding protein plays an active role in organizing the repair complex.


    Organizational Affiliation

    Laboratory of Structural Biology, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA repair protein XRCC1
A
189Homo sapiensMutation(s): 0 
Gene Names: XRCC1
Find proteins for P18887 (Homo sapiens)
Go to Gene View: XRCC1
Go to UniProtKB:  P18887
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
DNA polymerase beta
B
200Rattus norvegicusMutation(s): 0 
Gene Names: Polb
EC: 2.7.7.7, 4.2.99.-
Find proteins for P06766 (Rattus norvegicus)
Go to UniProtKB:  P06766
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

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Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CO3
Query on CO3

Download SDF File 
Download CCD File 
A
CARBONATE ION
C O3
BVKZGUZCCUSVTD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.349 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.189 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 75.240α = 90.00
b = 75.240β = 90.00
c = 126.160γ = 120.00
Software Package:
Software NamePurpose
XSCALEdata scaling
HKL-2000data collection
PHASERphasing
PDB_EXTRACTdata extraction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-04-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance