1I6A

CRYSTAL STRUCTURE OF THE OXIDIZED FORM OF OXYR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Structural basis of the redox switch in the OxyR transcription factor.

Choi, H.Kim, S.Mukhopadhyay, P.Cho, S.Woo, J.Storz, G.Ryu, S.

(2001) Cell 105: 103-113

  • Primary Citation of Related Structures:  1I69

  • PubMed Abstract: 
  • The Escherichia coli OxyR transcription factor senses H2O2 and is activated through the formation of an intramolecular disulfide bond. Here we present the crystal structures of the regulatory domain of OxyR in its reduced and oxidized forms, determin ...

    The Escherichia coli OxyR transcription factor senses H2O2 and is activated through the formation of an intramolecular disulfide bond. Here we present the crystal structures of the regulatory domain of OxyR in its reduced and oxidized forms, determined at 2.7 A and 2.3 A resolutions, respectively. In the reduced form, the two redox-active cysteines are separated by approximately 17 A. Disulfide bond formation in the oxidized form results in a significant structural change in the regulatory domain. The structural remodeling, which leads to different oligomeric associations, accounts for the redox-dependent switch in OxyR and provides a novel example of protein regulation by "fold editing" through a reversible disulfide bond formation within a folded domain.


    Organizational Affiliation

    Center for Cellular Switch Protein Structure, Korea Research Institute of Bioscience and, Biotechnology, P.O. Box 115, Yusong, 305-600, Taejon, South Korea




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HYDROGEN PEROXIDE-INDUCIBLE GENES ACTIVATOR
A
219Escherichia coli (strain K12)Gene Names: oxyR (momR, mor)
Find proteins for P0ACQ4 (Escherichia coli (strain K12))
Go to UniProtKB:  P0ACQ4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.169 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 96.830α = 90.00
b = 45.850β = 117.90
c = 53.420γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
SCALEPACKdata scaling
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-09-02
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-02-01
    Type: Structure summary
  • Version 1.4: 2017-10-04
    Type: Refinement description