The solution NMR structure of the C-terminal effector domain of BfmR from Acinetobacter baumannii

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

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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 430: 806-821

  • DOI: https://doi.org/10.1016/j.jmb.2018.02.002
  • Primary Citation of Related Structures:  
    2NAZ, 5HM6, 6BR7

  • 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 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 Discovery Sciences, RTI International, 3040 E. Cornwallis Road, Research Triangle Park, NC 27709, USA. Electronic address: jcavanagh@RTI.org.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transcriptional regulatory protein RstA118Acinetobacter baumannii ATCC 19606 = CIP 70.34 = JCM 6841Mutation(s): 0 
Gene Names: rstAF911_03224HMPREF0010_01249HTZ92_2727
Find proteins for D0C9D6 (Acinetobacter baumannii (strain ATCC 19606 / DSM 30007 / JCM 6841 / CCUG 19606 / CIP 70.34 / NBRC 109757 / NCIMB 12457 / NCTC 12156 / 81))
Explore D0C9D6 
Go to UniProtKB:  D0C9D6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD0C9D6
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-01-18
    Type: Initial release
  • Version 1.1: 2018-02-28
    Changes: Database references
  • Version 1.2: 2022-08-24
    Changes: Data collection, Database references
  • Version 1.3: 2023-06-14
    Changes: Other