1H9R

Tungstate bound complex Dimop domain of ModE from E.coli


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.170 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Oxyanion Binding Alters Conformational and Quaternary Structure of the C-Terminal Domain of the Transcriptional Regulator Mode; Implications for Molybdate-Dependant Regulation, Signalling, Storage and Transport

Gourley, D.G.Schuttelkopf, A.W.Anderson, L.A.Price, N.C.Boxer, D.H.Hunter, W.N.

(2001) J Biol Chem 276: 20641

  • DOI: 10.1074/jbc.M100919200
  • Primary Citation of Related Structures:  
    1H9S, 1H9R

  • PubMed Abstract: 
  • The molybdate-dependent transcriptional regulator ModE of Escherichia coli functions as a sensor of intracellular molybdate concentration and a regulator for the transcription of several operons that control the uptake and utilization of molybdenum. We present two high-resolution crystal structures of the C-terminal oxyanion-binding domain in complex with molybdate and tungstate ...

    The molybdate-dependent transcriptional regulator ModE of Escherichia coli functions as a sensor of intracellular molybdate concentration and a regulator for the transcription of several operons that control the uptake and utilization of molybdenum. We present two high-resolution crystal structures of the C-terminal oxyanion-binding domain in complex with molybdate and tungstate. The ligands bind between subunits at the dimerization interface, and analysis reveals that oxyanion selectivity is determined primarily by size. The relevance of the structures is indicated by fluorescence measurements, which show that the oxyanion binding properties of the C-terminal domain of ModE are similar to those of the full-length protein. Comparisons with the apoprotein structure have identified structural rearrangements that occur on binding oxyanion. This molybdate-dependent conformational switch promotes a change in shape and alterations to the surface of the protein and may provide the signal for recruitment of other proteins to construct the machinery for transcription. Sequence and structure-based comparisons lead to a classification of molybdate-binding proteins.


    Organizational Affiliation

    Wellcome Trust Biocentre, University of Dundee, Dundee, DD1 5EH, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MOLYBDENUM TRANSPORT PROTEIN MODE AB140Escherichia coliMutation(s): 1 
Find proteins for P0A9G8 (Escherichia coli (strain K12))
Explore P0A9G8 
Go to UniProtKB:  P0A9G8
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
WO4
Query on WO4

Download Ideal Coordinates CCD File 
A, B
TUNGSTATE(VI)ION
O4 W
PBYZMCDFOULPGH-UHFFFAOYSA-N
 Ligand Interaction
NI
Query on NI

Download Ideal Coordinates CCD File 
B
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.170 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.23α = 90
b = 73.23β = 90
c = 49.79γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-06-19
    Type: Initial release
  • Version 1.1: 2011-05-07
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance