1UTB

DntR from Burkholderia sp. strain DNT

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Development of a Bacterial Biosensor for Nitrotoluenes: The Crystal Structure of the Transcriptional Regulator Dntr

Smirnova, I.A., Dian, C., Leonard, G.A., Mcsweeney, S., Birse, D., Brzezinski, P.

(2004) J Mol Biol 340: 405

  • DOI: 10.1016/j.jmb.2004.04.071
  • Primary Citation of Related Structures:  
    1UTB, 1UTH

  • PubMed Abstract: 

    • The transcriptional regulator DntR, a member of the LysR family, is a central element in a prototype bacterial cell-based biosensor for the detection of hazardous contamination of soil and groundwater by dinitrotoluenes. To optimise the sensitivity of th ...

    The transcriptional regulator DntR, a member of the LysR family, is a central element in a prototype bacterial cell-based biosensor for the detection of hazardous contamination of soil and groundwater by dinitrotoluenes. To optimise the sensitivity of the biosensor for such compounds we have chosen a rational design of the inducer-binding cavity based on knowledge of the three-dimensional structure of DntR. We report two crystal structures of DntR with acetate (resolution 2.6 angstroms) and thiocyanate (resolution 2.3 angstroms), respectively, occupying the inducer-binding cavity. These structures allow for the construction of models of DntR in complex with salicylate (Kd approximately or = 4 microM) and 2,4-dinitrotoluene that provide a basis for the design of mutant DntR with enhanced specificity for dinitrotoluenes. In both crystal structures DntR crystallises as a homodimer with a "head-to-tail" arrangement of monomers in the asymmetric unit. Analysis of the crystal structure has allowed the building of a full-length model of DntR in its biologically active homotetrameric form consisting of two "head-to-head" dimers. The implications of this model for the mechanism of transcription regulation by LysR proteins are discussed.

    Organizational Affiliation: 

    Department of Biochemistry and Biophysics, Arrhenius Laboratories for Natural Sciences, Stockholm University, SE-106 91 Stockholm, Sweden.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
LYSR-TYPE REGULATORY PROTEIN A315Burkholderia sp. DNTMutation(s): 1 
Gene Names: dntR
Find proteins for Q7WT50 (Burkholderia sp. DNT)
Explore Q7WT50 
Go to UniProtKB:  Q7WT50
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
LYSR-TYPE REGULATORY PROTEIN B315Burkholderia sp. DNTMutation(s): 1 
Gene Names: dntR
Find proteins for Q7WT50 (Burkholderia sp. DNT)
Explore Q7WT50 
Go to UniProtKB:  Q7WT50
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.148α = 90
b = 107.148β = 90
c = 296.654γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-07-01
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance