1B9N

REGULATOR FROM ESCHERICHIA COLI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.09 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The high-resolution crystal structure of the molybdate-dependent transcriptional regulator (ModE) from Escherichia coli: a novel combination of domain folds.

Hall, D.R.Gourley, D.G.Leonard, G.A.Duke, E.M.Anderson, L.A.Boxer, D.H.Hunter, W.N.

(1999) EMBO J. 18: 1435-1446

  • DOI: 10.1093/emboj/18.6.1435
  • Primary Citation of Related Structures:  1B9M

  • PubMed Abstract: 
  • The molybdate-dependent transcriptional regulator (ModE) from Escherichia coli functions as a sensor of molybdate concentration and a regulator for transcription of operons involved in the uptake and utilization of the essential element, molybdenum. ...

    The molybdate-dependent transcriptional regulator (ModE) from Escherichia coli functions as a sensor of molybdate concentration and a regulator for transcription of operons involved in the uptake and utilization of the essential element, molybdenum. We have determined the structure of ModE using multi-wavelength anomalous dispersion. Selenomethionyl and native ModE models are refined to 1. 75 and 2.1 A, respectively and describe the architecture and structural detail of a complete transcriptional regulator. ModE is a homodimer and each subunit comprises N- and C-terminal domains. The N-terminal domain carries a winged helix-turn-helix motif for binding to DNA and is primarily responsible for ModE dimerization. The C-terminal domain contains the molybdate-binding site and residues implicated in binding the oxyanion are identified. This domain is divided into sub-domains a and b which have similar folds, although the organization of secondary structure elements varies. The sub-domain fold is related to the oligomer binding-fold and similar to that of the subunits of several toxins which are involved in extensive protein-protein interactions. This suggests a role for the C-terminal domain in the formation of the ModE-protein-DNA complexes necessary to regulate transcription. Modelling of ModE interacting with DNA suggests that a large distortion of DNA is not necessary for complex formation.


    Related Citations: 
    • Characterisation of the Molybdenum-Responsive ModE Regulatory Protein and its Binding to the Promoter Region of the ModABCD (Molybdenum Transport) Operon of Escherichia Coli
      Anderson, L.A.,Palmer, T.,Price, N.C.,Bornemann, S.,Boxer, D.H.,Pau, R.N.
      (1997) Eur.J.Biochem. 246: 119
    • Two Crystal Forms of ModE, the Molybdate Dependent Transcriptional Regulator from Escherichia Coli
      Hall, D.R.,Gourley, D.G.,Duke, E.M.H.,Leonard, G.A.,Anderson, L.A.,Pau, R.N.,Boxer, D.H.,Hunter, W.N.
      (1999) Acta Crystallogr.,Sect.D 55: 542


    Organizational Affiliation

    The Wellcome Trust Building, Department of Biochemistry, University of Dundee, Dundee DD1 5EH, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (MODE)
A, B
265Escherichia coli (strain K12)Gene Names: modE (modR)
Find proteins for P0A9G8 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A9G8
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NI
Query on NI

Download SDF File 
Download CCD File 
A
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.09 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.214 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 81.110α = 90.00
b = 127.360β = 90.00
c = 62.950γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-03-15
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance