1B9M

REGULATOR FROM ESCHERICHIA COLI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.234 

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: 1435-1436

  • DOI: 10.1093/emboj/18.6.1435
  • Primary Citation of Related Structures:  1B9N

  • 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
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.234 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 81.610α = 90.00
b = 127.240β = 90.00
c = 62.990γ = 90.00
Software Package:
Software NamePurpose
RANTANmodel building
RSPSphasing
DENZOdata reduction
RANTANphasing
CCP4data scaling
SCALEPACKdata scaling
RSPSmodel building
REVISEmodel building
MLPHAREphasing
REVISEphasing
REFMACrefinement

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