4O2H

Crystal structure of BCAM1869 protein (RsaM homolog) from Burkholderia cenocepacia


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.257 
  • 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

RsaM: a transcriptional regulator of Burkholderia spp. with novel fold.

Michalska, K.Chhor, G.Clancy, S.Jedrzejczak, R.Babnigg, G.Winans, S.C.Joachimiak, A.

(2014) FEBS J 281: 4293-4306

  • DOI: 10.1111/febs.12868
  • Primary Citation of Related Structures:  
    4O2H

  • PubMed Abstract: 
  • Burkholderia cepacia complex is a set of closely related bacterial species that are notorious pathogens of cystic fibrosis patients, responsible for life-threatening lung infections. Expression of several virulence factors of Burkholderia cepacia complex is controlled by a mechanism known as quorum sensing (QS) ...

    Burkholderia cepacia complex is a set of closely related bacterial species that are notorious pathogens of cystic fibrosis patients, responsible for life-threatening lung infections. Expression of several virulence factors of Burkholderia cepacia complex is controlled by a mechanism known as quorum sensing (QS). QS is a means of bacterial communication used to coordinate gene expression in a cell-density-dependent manner. The system involves the production of diffusible signaling molecules (N-acyl-l-homoserine lactones, AHLs), that bind to cognate transcriptional regulators and influence their ability to regulate gene expression. One such system that is highly conserved in Burkholderia cepacia complex consists of CepI and CepR. CepI is AHL synthase, whereas CepR is an AHL-dependent transcription factor. In most members of the Burkholderia cepacia complex group, the cepI and cepR genes are divergently transcribed and separated by additional genes. One of them, bcam1869, encodes the BcRsaM protein, which was recently postulated to modulate the abundance or activity of CepI or CepR. Here, we show the crystal structure of BcRsaM from B. cenocepacia J2315. It is a single-domain protein with unique topology and presents a novel fold. The protein is a dimer in the crystal and in solution. This regulator has no known DNA-binding motifs and direct binding of BcRsaM to the cepI promoter could not be detected in in vitro assays. Therefore, we propose that the modulatory action of RsaM might result from interactions with other components of the QS machinery rather than from direct association with the DNA promoter.


    Organizational Affiliation

    Midwest Center for Structural Genomics, Argonne National Laboratory, IL, USA; Structural Biology Center, Biosciences Division, Argonne National Laboratory, IL, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
protein BCAM1869A, B150Burkholderia cenocepacia J2315Mutation(s): 0 
Gene Names: BCAM1869
UniProt
Find proteins for B4EMD1 (Burkholderia cenocepacia (strain ATCC BAA-245 / DSM 16553 / LMG 16656 / NCTC 13227 / J2315 / CF5610))
Explore B4EMD1 
Go to UniProtKB:  B4EMD1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB4EMD1
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
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: 2.30 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.146α = 90
b = 69.146β = 90
c = 216.772γ = 120
Software Package:
Software NamePurpose
SBC-Collectdata collection
SHARPphasing
PHASERphasing
BUSTERrefinement
HKL-3000data reduction
HKL-3000data scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-01-22
    Type: Initial release
  • Version 1.1: 2014-07-02
    Changes: Database references
  • Version 1.2: 2014-10-01
    Changes: Database references