2ADO

Crystal Structure Of The Brct Repeat Region From The Mediator of DNA damage checkpoint protein 1, MDC1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of the BRCT Repeat Domain of MDC1 and Its Specificity for the Free COOH-terminal End of the {gamma}-H2AX Histone Tail.

Lee, M.S.Edwards, R.A.Thede, G.L.Glover, J.N.

(2005) J.Biol.Chem. 280: 32053-32056

  • DOI: 10.1074/jbc.C500273200

  • PubMed Abstract: 
  • MDC1 (mediator of DNA damage checkpoint protein 1) regulates the recognition and repair of DNA double strand breaks in mammalian cells through its interactions with nuclear foci containing the COOH-terminally phosphorylated form of the histone varian ...

    MDC1 (mediator of DNA damage checkpoint protein 1) regulates the recognition and repair of DNA double strand breaks in mammalian cells through its interactions with nuclear foci containing the COOH-terminally phosphorylated form of the histone variant, H2AX. Here we demonstrate that the tandem BRCT repeats of MDC1 directly bind to the phosphorylated tail of H2AX-Ser(P)-Gln-Glu-Tyr, in a manner that is critically dependent on the free carboxylate group of the COOH-terminal Tyr residue. We have determined the x-ray crystal structure of the MDC1 BRCT repeats at 1.45 Angstroms resolution. By a comparison with the structure of the BRCA1 BRCT bound to a phosphopeptide, we suggest that two arginine residues in MDC1, Arg(1932) and Arg(1933) may recognize the COOH terminus of the peptide as well as the penultimate Glu of H2AX, while Gln(2013) may provide additional specificity for the COOH-terminal Tyr.


    Organizational Affiliation

    Department of Biochemistry, University of Alberta, Edmonton, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mediator of DNA damage checkpoint protein 1
A, B
196Homo sapiensMutation(s): 0 
Gene Names: MDC1 (KIAA0170, NFBD1)
Find proteins for Q14676 (Homo sapiens)
Go to Gene View: MDC1
Go to UniProtKB:  Q14676
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.195 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 42.051α = 72.95
b = 44.440β = 87.54
c = 61.942γ = 61.80
Software Package:
Software NamePurpose
CNSrefinement
SOLVEphasing
PDB_EXTRACTdata extraction
RESOLVEphasing
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-08-02
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description