Crystal structure of M26V human DJ-1

Experimental Data Snapshot

  • Resolution: 1.45 Å
  • R-Value Free: 0.132 
  • R-Value Work: 0.110 
  • R-Value Observed: 0.111 

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Transient sampling of aggregation-prone conformations causes pathogenic instability of a parkinsonian mutant of DJ-1 at physiological temperature.

Milkovic, N.M.Catazaro, J.Lin, J.Halouska, S.Kizziah, J.L.Basiaga, S.Cerny, R.L.Powers, R.Wilson, M.A.

(2015) Protein Sci 24: 1671-1685

  • DOI: https://doi.org/10.1002/pro.2762
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Various missense mutations in the cytoprotective protein DJ-1 cause rare forms of inherited parkinsonism. One mutation, M26I, diminishes DJ-1 protein levels in the cell but does not result in large changes in the three-dimensional structure or thermal stability of the protein. Therefore, the molecular defect that results in loss of M26I DJ-1 protective function is unclear. Using NMR spectroscopy near physiological temperature, we found that the picosecond-nanosecond dynamics of wild-type and M26I DJ-1 are similar. In contrast, elevated amide hydrogen/deuterium exchange rates indicate that M26I DJ-1 is more flexible than the wild-type protein on longer timescales and that hydrophobic regions of M26I DJ-1 are transiently exposed to solvent. Tryptophan fluorescence spectroscopy and thiol crosslinking analyzed by mass spectrometry also demonstrate that M26I DJ-1 samples conformations that differ from the wild-type protein at 37°C. These transiently sampled conformations are unstable and cause M26I DJ-1 to aggregate in vitro at physiological temperature but not at lower temperatures. M26I DJ-1 aggregation is correlated with pathogenicity, as the structurally similar but non-pathogenic M26L mutation does not aggregate at 37°C. The onset of dynamically driven M26I DJ-1 instability at physiological temperature resolves conflicting literature reports about the behavior of this disease-associated mutant and illustrates the pitfalls of characterizing proteins exclusively at room temperature or below, as key aspects of their behavior may not be apparent.

  • Organizational Affiliation

    Department of Biochemistry and the Redox Biology Center, University of Nebraska-Lincoln, Lincoln, Nebraska, 68588.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein DJ-1192Homo sapiensMutation(s): 1 
Gene Names: PARK7
EC: 3.4
UniProt & NIH Common Fund Data Resources
Find proteins for Q99497 (Homo sapiens)
Explore Q99497 
Go to UniProtKB:  Q99497
PHAROS:  Q99497
GTEx:  ENSG00000116288 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ99497
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.45 Å
  • R-Value Free: 0.132 
  • R-Value Work: 0.110 
  • R-Value Observed: 0.111 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.039α = 90
b = 75.039β = 90
c = 75.269γ = 120
Software Package:
Software NamePurpose
CrystalCleardata collection
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-08-05
    Type: Initial release
  • Version 1.1: 2015-10-14
    Changes: Database references
  • Version 1.2: 2023-09-20
    Changes: Data collection, Database references, Derived calculations, Refinement description