1DPR

STRUCTURES OF THE APO-AND METAL ION ACTIVATED FORMS OF THE DIPHTHERIA TOX REPRESSOR FROM CORYNEBACTERIUM DIPHTHERIAE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.417 
  • R-Value Work: 0.241 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structures of the apo- and the metal ion-activated forms of the diphtheria tox repressor from Corynebacterium diphtheriae.

Schiering, N.Tao, X.Zeng, H.Murphy, J.R.Petsko, G.A.Ringe, D.

(1995) Proc.Natl.Acad.Sci.USA 92: 9843-9850


  • PubMed Abstract: 
  • The diphtheria tox repressor (DtxR) of Corynebacterium diphtheriae plays a critical role in the regulation of diphtheria toxin expression and the control of other iron-sensitive genes. The crystal structures of apo-DtxR and of the metal ion-activated ...

    The diphtheria tox repressor (DtxR) of Corynebacterium diphtheriae plays a critical role in the regulation of diphtheria toxin expression and the control of other iron-sensitive genes. The crystal structures of apo-DtxR and of the metal ion-activated form of the repressor have been solved and used to identify motifs involved in DNA and metal ion binding. Residues involved in binding of the activated repressor to the diphtheria tox operator, glutamine 43, arginine 47, and arginine 50, were located and confirmed by site-directed mutagenesis. Previous biochemical and genetic data can be explained in terms of these structures. Conformational differences between apo- and Ni-DtxR are discussed with regard to the mechanism of action of this repressor.


    Related Citations: 
    • Crystallization and Preliminary X-Ray Studies of the Diphtheria Tox Repressor from Corynebacterium Diphtheriae
      Schiering, N.,Tao, X.,Murphy, J.,Petsko, G.,Ringe, D.
      (1994) J.Mol.Biol. 244: 654
    • Iron, Dtxr, and the Regulation of Diphtheria Toxin Expression
      Tao, X.,Schiering, N.,Zeng, H.,Ringe, D.,Murphy, J.
      (1994) Mol.Microbiol. 14: 191


    Organizational Affiliation

    Department of Chemistry, Brandeis University, Waltham, MA 02154, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DIPHTHERIA TOX REPRESSOR
A, B
226Corynebacterium diphtheriae (strain ATCC 700971 / NCTC 13129 / Biotype gravis)Gene Names: dtxR
Find proteins for P0DJL7 (Corynebacterium diphtheriae (strain ATCC 700971 / NCTC 13129 / Biotype gravis))
Go to UniProtKB:  P0DJL7
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.417 
  • R-Value Work: 0.241 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 64.000α = 90.00
b = 64.000β = 90.00
c = 220.400γ = 120.00
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORrefinement
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-09-15
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance