1K4Q

Human Glutathione Reductase Inactivated by Peroxynitrite


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the antioxidant enzyme glutathione reductase inactivated by peroxynitrite.

Savvides, S.N.Scheiwein, M.Bohme, C.C.Arteel, G.E.Karplus, P.A.Becker, K.Schirmer, R.H.

(2002) J.Biol.Chem. 277: 2779-2784

  • DOI: 10.1074/jbc.M108190200

  • PubMed Abstract: 
  • As part of our studies on the nitric oxide-related pathology of cerebral malaria, we show that the antioxidative enzyme glutathione reductase (GR) is inactivated by peroxynitrite, with GR from the malarial parasite Plasmodium falciparum being more se ...

    As part of our studies on the nitric oxide-related pathology of cerebral malaria, we show that the antioxidative enzyme glutathione reductase (GR) is inactivated by peroxynitrite, with GR from the malarial parasite Plasmodium falciparum being more sensitive than human GR. The crystal structure of modified human GR at 1.9-A resolution provides the first picture of protein inactivation by peroxynitrite and reveals that this is due to the exclusive nitration of 2 Tyr residues (residues 106 and 114) at the glutathione disulfide-binding site. The selective nitration explains the impairment of binding the peptide substrate and thus the nearly 1000-fold decrease in catalytic efficiency (k(cat)/K(m)) of glutathione reductase observed at physiologic pH. By oxidizing the catalytic dithiol to a disulfide, peroxynitrite itself can act as a substrate of unmodified and bisnitrated P. falciparum glutathione reductase.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, Oregon State University, Corvallis, Oregon 97331-7305, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutathione Reductase
A
461Homo sapiensMutation(s): 0 
Gene Names: GSR (GLUR, GRD1)
EC: 1.8.1.7
Find proteins for P00390 (Homo sapiens)
Go to Gene View: GSR
Go to UniProtKB:  P00390
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download SDF File 
Download CCD File 
A
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NIY
Query on NIY
A
L-PEPTIDE LINKINGC9 H10 N2 O5TYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.166 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 119.750α = 90.00
b = 63.650β = 58.42
c = 84.710γ = 90.00
Software Package:
Software NamePurpose
R-AXISdata collection
X-PLORmodel building
SCALEPACKdata scaling
X-PLORrefinement
R-AXISdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-01-30
    Type: Initial release
  • Version 1.1: 2007-10-16
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Atomic model, Derived calculations, Version format compliance