2UYF

Single mutant F111L DntR from Burkholderia sp. strain DNT in complex with thiocyanate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

In Vivo and in Vitro Investigation of Transcriptional Regulation by Dntr.

Lonneborg, R.Smirova, I.Dian, C.Leonard, G.A.Brzezinski, P.

(2007) J.Mol.Biol. 372: 571

  • DOI: 10.1016/j.jmb.2007.06.076
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • DntR is a bacterial transcription factor that has been isolated from Burkholderia species that are able to degrade the nitro-aromatic compound 2,4-dinitrotoluene. We recently solved the X-ray crystal structure of DntR, which suggested a putative loca ...

    DntR is a bacterial transcription factor that has been isolated from Burkholderia species that are able to degrade the nitro-aromatic compound 2,4-dinitrotoluene. We recently solved the X-ray crystal structure of DntR, which suggested a putative location of an inducer-binding cavity (IBC). In this study, we constructed mutants of DntR in which residues lining the proposed IBC were modified in order to identify the structural elements involved in inducer binding, to modulate the inducer binding specificity, and to investigate the mechanism of transcriptional regulation by DntR. The transcriptional activation of the reporter gene gfp induced by the wild-type and mutant DntRs was monitored by analysing whole-cell fluorescence using flow-cytometry after addition of a number of potential inducer compounds. Three of the mutant proteins (F111L; F111V/H169V and Y110S/F111V) were purified and the binding constants for several of the potential inducers to these mutants were estimated. Furthermore, crystal structures of the F111L and Y110S/F111V mutant proteins were solved and used to explain changes in the inducer binding specificity at an atomic level. A comparison of the inducing capability in the whole-cell system and binding constants for a number of potential inducers suggests a mechanism where binding of an inducer molecule is not the sole requirement for transcriptional activation. In addition, specific interactions between DntR and the inducer molecule resulting in a conformational change of the protein are needed.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
REGULATORY PROTEIN
A, B
307Burkholderia cepaciaMutation(s): 1 
Find proteins for Q8VUD7 (Burkholderia cepacia)
Go to UniProtKB:  Q8VUD7
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SCN
Query on SCN

Download SDF File 
Download CCD File 
A, B
THIOCYANATE ION
C N S
ZMZDMBWJUHKJPS-UHFFFAOYSA-M
 Ligand Interaction
ACT
Query on ACT

Download SDF File 
Download CCD File 
B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.207 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 106.604α = 90.00
b = 106.604β = 90.00
c = 296.448γ = 120.00
Software Package:
Software NamePurpose
XDSdata scaling
XDSdata reduction
REFMACrefinement
REFMACphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-08-21
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance