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 
  • R-Value Observed: 0.206 

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
  • Primary Citation of Related Structures:  
    3KT9

  • 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 radiation and binds to mediator of DNA-damage checkpoint protein 1 (MDC1/NFBD1) through a phosphorylation-dependent interaction ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
AprataxinA102Homo sapiensMutation(s): 0 
Gene Names: APTXAXA1
EC: 3 (PDB Primary Data), 3.6.1.71 (UniProt), 3.6.1.72 (UniProt)
Find proteins for Q7Z2E3 (Homo sapiens)
Explore Q7Z2E3 
Go to UniProtKB:  Q7Z2E3
NIH Common Fund Data Resources
PHAROS:  Q7Z2E3
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.206 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.949α = 90
b = 40.554β = 110.24
c = 42.477γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

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