4QN0

Crystal structure of the CPS-6 mutant Q130K


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.74 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Oxidative Stress Impairs Cell Death by Repressing the Nuclease Activity of Mitochondrial Endonuclease G

Lin, J.L.J.Nakagawa, A.Skeen-Gaar, R.Yang, W.Z.Zhao, P.Zhang, Z.Ge, X.Mitani, S.Xue, D.Yuan, H.S.

(2016) Cell Rep 16: 279-287

  • DOI: 10.1016/j.celrep.2016.05.090

  • PubMed Abstract: 
  • Endonuclease G (EndoG) is a mitochondrial protein that is released from mitochondria and relocated into the nucleus to promote chromosomal DNA fragmentation during apoptosis. Here, we show that oxidative stress causes cell-death defects in C. elegans ...

    Endonuclease G (EndoG) is a mitochondrial protein that is released from mitochondria and relocated into the nucleus to promote chromosomal DNA fragmentation during apoptosis. Here, we show that oxidative stress causes cell-death defects in C. elegans through an EndoG-mediated cell-death pathway. In response to high reactive oxygen species (ROS) levels, homodimeric CPS-6-the C. elegans homolog of EndoG-is dissociated into monomers with diminished nuclease activity. Conversely, the nuclease activity of CPS-6 is enhanced, and its dimeric structure is stabilized by its interaction with the worm AIF homolog, WAH-1, which shifts to disulfide cross-linked dimers under high ROS levels. CPS-6 thus acts as a ROS sensor to regulate the life and death of cells. Modulation of the EndoG dimer conformation could present an avenue for prevention and treatment of diseases resulting from oxidative stress.


    Related Citations: 
    • Structural Insights into Apoptotic DNA Degradation by CED-3 Protease Suppressor-6 (CPS-6) from Caenorhabditis elegans
      Lin, J.L.J.,Nakagawa, A.,Hsiao, Y.Y.,Yang, W.Z.,Wang, Y.T.,Doudeva, L.G.,Skeen-Gaar, R.R.,Xui, D.,Yuan, H.S.
      (2012) J.Biol.Chem. 287: 7110


    Organizational Affiliation

    Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan 11529, ROC.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Endonuclease G, mitochondrial
A, B, C, D
239Caenorhabditis elegansGene Names: cps-6
EC: 3.1.30.-
Find proteins for Q95NM6 (Caenorhabditis elegans)
Go to UniProtKB:  Q95NM6
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A, B, C, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.74 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.185 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 67.550α = 90.00
b = 122.442β = 96.02
c = 73.522γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
PHENIXmodel building
HKL-2000data reduction
PHENIXrefinement
HKL-2000data collection
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-06-17
    Type: Initial release
  • Version 1.1: 2016-07-27
    Type: Database references