3SF8

Structural insights into thiol stabilization of DJ-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.56 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.172 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Identification of an artificial peptide motif that binds and stabilizes reduced human DJ-1.

Premkumar, L.Dobaczewska, M.K.Riedl, S.J.

(2011) J.Struct.Biol. 176: 414-418

  • DOI: 10.1016/j.jsb.2011.08.011

  • PubMed Abstract: 
  • Although the precise biochemical function of DJ-1 remains unclear, it has been found to exert cytoprotective activity against oxidative stress. Cys106 is central to this function since it has a distinctly low pK(a) rendering it extremely susceptible ...

    Although the precise biochemical function of DJ-1 remains unclear, it has been found to exert cytoprotective activity against oxidative stress. Cys106 is central to this function since it has a distinctly low pK(a) rendering it extremely susceptible for oxidation. This characteristic, however, also poses a severe hindrance to obtain reduced DJ-1 for in vitro investigation. We have developed an approach to produce recombinant human DJ-1 in its reduced form as a bona fide basis for exploring the redox capacities of the protein. We solved the crystal structure of this DJ-1 at 1.56Å resolution, allowing us to capture Cys106 in the reduced state for the first time. The dimeric structure reveals one molecule of DJ-1 in its reduced state while the other exhibits the characteristics of a mono-oxygenated cysteine. Comparison with previous structures indicates the absence of redox dependent global conformational changes in DJ-1. The capture of reduced Cys106 is facilitated by stabilization within the putative active site achieved through a glutamate side chain. This side chain is provided by a crystallographic neighbor as part of a 'Leu-Glu' motif, which was added to the C-terminus of DJ-1. In the structure this motif binds DJ-1 in close proximity to Cys106 through extended hydrophilic and hydrophobic interactions depicting a distinct binding pocket, which can serve as a basis for compound development targeting DJ-1.


    Organizational Affiliation

    Cancer Center, Sanford-Burnham Medical Research Institute, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein DJ-1
A
191Homo sapiensGene Names: PARK7
EC: 3.1.2.-, 3.5.1.-
Find proteins for Q99497 (Homo sapiens)
Go to Gene View: PARK7
Go to UniProtKB:  Q99497
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Protein DJ-1
B
191Homo sapiensGene Names: PARK7
EC: 3.1.2.-, 3.5.1.-
Find proteins for Q99497 (Homo sapiens)
Go to Gene View: PARK7
Go to UniProtKB:  Q99497
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSO
Query on CSO
A
L-PEPTIDE LINKINGC3 H7 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.56 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.172 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 141.880α = 90.00
b = 41.831β = 115.79
c = 63.344γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
CrystalCleardata collection
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-10-05
    Type: Initial release
  • Version 1.1: 2011-11-23
    Type: Database references