1XNT

NMR SOLUTION STRUCTURE OF THE SINGLE-STRAND BREAK REPAIR PROTEIN XRCC1-N-TERMINAL DOMAIN


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 23 
  • Selection Criteria: 30 OUT OF 60 STRUCTURES IN DYANA, CRITERION: TARGET FUNCTION. X-PLOR REFINEMENT: 23 OUT OF 30 STRUCTURES, CRITERIA: NO NOE RESTRAINT VIOLATIONS > 0.5 A AND NO DIHEDRAL ANGLE RESTRAINT VIOLATIONS > 5 DEG. 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of the single-strand break repair protein XRCC1 N-terminal domain.

Marintchev, A.Mullen, M.A.Maciejewski, M.W.Pan, B.Gryk, M.R.Mullen, G.P.

(1999) Nat.Struct.Mol.Biol. 6: 884-893

  • DOI: 10.1038/12347
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • XRCC1 functions in the repair of single-strand DNA breaks in mammalian cells and forms a repair complex with beta-Pol, ligase III and PARP. Here we describe the NMR solution structure of the XRCC1 N-terminal domain (XRCC1 NTD). The structural core is ...

    XRCC1 functions in the repair of single-strand DNA breaks in mammalian cells and forms a repair complex with beta-Pol, ligase III and PARP. Here we describe the NMR solution structure of the XRCC1 N-terminal domain (XRCC1 NTD). The structural core is a beta-sandwich with beta-strands connected by loops, three helices and two short two-stranded beta-sheets at each connection side. We show, for the first time, that the XRCC1 NTD specifically binds single-strand break DNA (gapped and nicked). We also show that the XRCC1 NTD binds a gapped DNA-beta-Pol complex. The DNA binding and beta-Pol binding surfaces were mapped by NMR and found to be well suited for interaction with single-strand gap DNA containing a 90 degrees bend, and for simultaneously making contacts with the palm-thumb of beta-Pol in a ternary complex. The findings suggest a mechanism for preferential binding of the XRCC1 NTD to flexible single-strand break DNA.


    Organizational Affiliation

    Department of Biochemistry, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, Connecticut 06032, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (DNA-REPAIR PROTEIN XRCC1)
A
183Homo sapiensMutation(s): 0 
Gene Names: XRCC1
Find proteins for P18887 (Homo sapiens)
Go to Gene View: XRCC1
Go to UniProtKB:  P18887
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 23 
  • Selection Criteria: 30 OUT OF 60 STRUCTURES IN DYANA, CRITERION: TARGET FUNCTION. X-PLOR REFINEMENT: 23 OUT OF 30 STRUCTURES, CRITERIA: NO NOE RESTRAINT VIOLATIONS > 0.5 A AND NO DIHEDRAL ANGLE RESTRAINT VIOLATIONS > 5 DEG. 
  • Olderado: 1XNT Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-09-01
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance