5HM6

N-terminal domain of BfmR from Acinetobacter baumannii


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Structure of the Biofilm-controlling Response Regulator BfmR from Acinetobacter baumannii Reveals Details of Its DNA-binding Mechanism.

Draughn, G.L.Milton, M.E.Feldmann, E.A.Bobay, B.G.Roth, B.M.Olson, A.L.Thompson, R.J.Actis, L.A.Davies, C.Cavanagh, J.

(2018) J. Mol. Biol. --: --

  • DOI: 10.1016/j.jmb.2018.02.002
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The rise of drug-resistant bacterial infections coupled with decreasing antibiotic efficacy poses a significant challenge to global health care. Acinetobacter baumannii is an insidious, emerging bacterial pathogen responsible for severe nosocomial in ...

    The rise of drug-resistant bacterial infections coupled with decreasing antibiotic efficacy poses a significant challenge to global health care. Acinetobacter baumannii is an insidious, emerging bacterial pathogen responsible for severe nosocomial infections aided by its ability to form biofilms. The response regulator BfmR, from the BfmR/S two-component system, is the master regulator of biofilm initiation in A. baumannii and is a tractable therapeutic target. Here we present the structure of A. baumannii BfmR using a hybrid approach combining X-ray crystallography, nuclear magnetic resonance spectroscopy, chemical crosslinking mass spectrometry, and molecular modeling. We also show that BfmR binds the previously proposed bfmRS promoter sequence with moderate affinity. While BfmR shares many traits with other OmpR/PhoB family response regulators, some unusual properties were observed. Most importantly, we observe that when phosphorylated, BfmR binds this promoter sequence with a lower affinity than when not phosphorylated. All other OmpR/PhoB family members studied to date show an increase in DNA-binding affinity upon phosphorylation. Understanding the structural and biochemical mechanisms of BfmR will aid in the development of new antimicrobial therapies.


    Organizational Affiliation

    Department of Molecular and Structural Biochemistry, North Carolina State University, Raleigh, NC 27695, USA; Department of Discovery Sciences, RTI International, 3040 E. Cornwallis Road, Research Triangle Park, NC 27709, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BfmR
A, B
133Acinetobacter baumanniiMutation(s): 0 
Gene Names: bfmR (rstA, rstA_1, rstA_2, rstA_4)
Find proteins for Q2VSW6 (Acinetobacter baumannii)
Go to UniProtKB:  Q2VSW6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.201 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 51.800α = 90.00
b = 51.800β = 90.00
c = 197.600γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data scaling
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2016-01-15 
  • Released Date: 2017-01-18 
  • Deposition Author(s): Roth, B.R., Davies, C.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM055769

Revision History 

  • Version 1.0: 2017-01-18
    Type: Initial release
  • Version 1.1: 2017-09-27
    Type: Author supporting evidence
  • Version 1.2: 2018-03-07
    Type: Database references, Source and taxonomy