3KT9

Aprataxin FHA Domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

CK2 phosphorylation-dependent interaction between aprataxin and MDC1 in the DNA damage response.

Becherel, O.J.Jakob, B.Cherry, A.L.Gueven, N.Fusser, M.Kijas, A.W.Peng, C.Katyal, S.McKinnon, P.J.Chen, J.Epe, B.Smerdon, S.J.Taucher-Scholz, G.Lavin, M.F.

(2010) Nucleic Acids Res. 38: 1489-1503

  • DOI: 10.1093/nar/gkp1149

  • PubMed Abstract: 
  • Aprataxin, defective in the neurodegenerative disorder ataxia oculomotor apraxia type 1, resolves abortive DNA ligation intermediates during DNA repair. Here, we demonstrate that aprataxin localizes at sites of DNA damage induced by high LET radiatio ...

    Aprataxin, defective in the neurodegenerative disorder ataxia oculomotor apraxia type 1, resolves abortive DNA ligation intermediates during DNA repair. Here, we demonstrate that aprataxin localizes at sites of DNA damage induced by high LET radiation and binds to mediator of DNA-damage checkpoint protein 1 (MDC1/NFBD1) through a phosphorylation-dependent interaction. This interaction is mediated via the aprataxin FHA domain and multiple casein kinase 2 di-phosphorylated S-D-T-D motifs in MDC1. X-ray structural and mutagenic analysis of aprataxin FHA domain, combined with modelling of the pSDpTD peptide interaction suggest an unusual FHA binding mechanism mediated by a cluster of basic residues at and around the canonical pT-docking site. Mutation of aprataxin FHA Arg29 prevented its interaction with MDC1 and recruitment to sites of DNA damage. These results indicate that aprataxin is involved not only in single strand break repair but also in the processing of a subset of double strand breaks presumably through its interaction with MDC1.


    Organizational Affiliation

    Queensland Institute of Medical Research, Radiation Biology and Oncology, Brisbane, QLD 4029, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aprataxin
A
102Homo sapiensMutation(s): 0 
Gene Names: APTX (AXA1)
EC: 3.1.11.7, 3.1.12.2
Find proteins for Q7Z2E3 (Homo sapiens)
Go to Gene View: APTX
Go to UniProtKB:  Q7Z2E3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.205 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 65.949α = 90.00
b = 40.554β = 110.24
c = 42.477γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement
PDB_EXTRACTdata extraction
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-01-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-01
    Type: Refinement description