2G9W

Crystal Structure of Rv1846c, a Putative Transcriptional Regulatory Protein of Mycobacterium Tuberculosis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Genome-wide regulon and crystal structure of BlaI (Rv1846c) from Mycobacterium tuberculosis

Sala, C.Haouz, A.Saul, F.A.Miras, I.Rosenkrands, I.Alzari, P.M.Cole, S.T.

(2009) Mol.Microbiol. 71: 1102-1116

  • DOI: 10.1111/j.1365-2958.2008.06583.x

  • PubMed Abstract: 
  • Comparative genomics with Staphylococcus aureus suggested the existence of a regulatory system governing beta-lactamase (BlaC) production in Mycobacterium tuberculosis. The crystal structure of Rv1846c, a winged helix regulator of previously unknown ...

    Comparative genomics with Staphylococcus aureus suggested the existence of a regulatory system governing beta-lactamase (BlaC) production in Mycobacterium tuberculosis. The crystal structure of Rv1846c, a winged helix regulator of previously unknown function, was solved thus revealing strong similarity to the BlaI and MecI repressors of S. aureus, which both respond to beta-lactam treatment. Using chromatin immunoprecipitation and hybridization to microarrays (ChIP-on-chip), the Rv1846c regulon was shown to comprise five separate genomic loci. Two of these mediate responses and resistance to beta-lactam antibiotics (rv1845c, rv1846c-rv1847; blaC-sigC); two encode membrane proteins of unknown function (rv1456c, rv3921c) while the last codes for ATP synthase (rv1303-atpBEFHAGDC-rv1312). The ChIP-on-chip findings were confirmed independently using electrophoretic mobility shift assays, DNAse footprinting and transcript analysis leading to Rv1846c being renamed BlaI. When cells were treated with beta-lactams, BlaI was released from its operator sites causing derepression of the regulon and upregulation of ATP synthase transcription. The existence of a potential regulatory loop between cell wall integrity and ATP production was previously unknown.


    Organizational Affiliation

    Global Health Institute, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
conserved hypothetical protein
A, B
138Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 1 
Gene Names: blaI
Find proteins for P9WMJ5 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WMJ5
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 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: 1.8 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.202 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 60.580α = 90.00
b = 64.330β = 90.00
c = 75.750γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
CCP4data scaling
REFMACrefinement
SOLVEphasing
DMphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-03-13
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Source and taxonomy, Version format compliance