5UIC

Structure of the Francisella response regulator receiver domain, QseB

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history. 


Literature

Structure of the Francisella response regulator QseB receiver domain, and characterization of QseB inhibition by antibiofilm 2-aminoimidazole-based compounds.

Milton, M.E., Allen, C.L., Feldmann, E.A., Bobay, B.G., Jung, D.K., Stephens, M.D., Melander, R.J., Theisen, K.E., Zeng, D., Thompson, R.J., Melander, C., Cavanagh, J.

(2017) Mol Microbiol 106: 223-235

  • DOI: 10.1111/mmi.13759
  • Structures With Same Primary Citation

  • PubMed Abstract: 

    • With antibiotic resistance increasing at alarming rates, targets for new antimicrobial therapies must be identified. A particularly promising target is the bacterial two-component system. Two-component systems allow bacteria to detect, evaluate and p ...

    With antibiotic resistance increasing at alarming rates, targets for new antimicrobial therapies must be identified. A particularly promising target is the bacterial two-component system. Two-component systems allow bacteria to detect, evaluate and protect themselves against changes in the environment, such as exposure to antibiotics and also to trigger production of virulence factors. Drugs that target the response regulator portion of two-component systems represent a potent new approach so far unexploited. Here, we focus efforts on the highly virulent bacterium Francisella tularensis tularensis. Francisella contains only three response regulators, making it an ideal system to study. In this study, we initially present the structure of the N-terminal domain of QseB, the response regulator responsible for biofilm formation. Subsequently, using binding assays, computational docking and cellular studies, we show that QseB interacts with2-aminoimidazole based compounds that impede its function. This information will assist in tailoring compounds to act as adjuvants that will enhance the effect of antibiotics.

    Organizational Affiliation: 

    RTI International, 3040 Cornwallis Rd, RTP, NC 27709, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Two-component response regulator
A, B
144Francisella tularensis subsp. novicida U112Mutation(s): 0 
Gene Names: FTN_1465
Find proteins for A0Q7W8 (Francisella tularensis subsp. novicida (strain U112))
Go to UniProtKB:  A0Q7W8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.226 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.737α = 90
b = 47.737β = 90
c = 191.789γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

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View more in-depth experimental data

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesRO1 GM55769
Department of Health & Human Services (HHS)United StatesHHSN272201500010C

Revision History 

  • Version 1.0: 2017-08-16
    Type: Initial release
  • Version 1.1: 2017-08-23
    Changes: Data collection
  • Version 1.2: 2017-09-13
    Changes: Author supporting evidence
  • Version 1.3: 2017-10-18
    Changes: Database references
  • Version 1.4: 2020-01-01
    Changes: Author supporting evidence