1I6A

CRYSTAL STRUCTURE OF THE OXIDIZED FORM OF OXYR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.169 

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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

  • DOI: 10.1016/s0092-8674(01)00300-2
  • Primary Citation of Related Structures:  
    1I69, 1I6A

  • 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, determined at 2 ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HYDROGEN PEROXIDE-INDUCIBLE GENES ACTIVATORA219Escherichia coliMutation(s): 3 
UniProt
Find proteins for P0ACQ4 (Escherichia coli (strain K12))
Explore P0ACQ4 
Go to UniProtKB:  P0ACQ4
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.169 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.83α = 90
b = 45.85β = 117.9
c = 53.42γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling
SOLVEphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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