4Q0C

3.1 A resolution crystal structure of the B. pertussis BvgS periplasmic domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Virulence Regulation with Venus Flytrap Domains: Structure and Function of the Periplasmic Moiety of the Sensor-Kinase BvgS.

Dupre, E.Herrou, J.Lensink, M.F.Wintjens, R.Vagin, A.Lebedev, A.Crosson, S.Villeret, V.Locht, C.Antoine, R.Jacob-Dubuisson, F.

(2015) PLoS Pathog 11: e1004700-e1004700

  • DOI: 10.1371/journal.ppat.1004700
  • Primary Citation of Related Structures:  
    4Q0C

  • PubMed Abstract: 
  • Two-component systems (TCS) represent major signal-transduction pathways for adaptation to environmental conditions, and regulate many aspects of bacterial physiology. In the whooping cough agent Bordetella pertussis, the TCS BvgAS controls the virulence regulon, and is therefore critical for pathogenicity ...

    Two-component systems (TCS) represent major signal-transduction pathways for adaptation to environmental conditions, and regulate many aspects of bacterial physiology. In the whooping cough agent Bordetella pertussis, the TCS BvgAS controls the virulence regulon, and is therefore critical for pathogenicity. BvgS is a prototypical TCS sensor-kinase with tandem periplasmic Venus flytrap (VFT) domains. VFT are bi-lobed domains that typically close around specific ligands using clamshell motions. We report the X-ray structure of the periplasmic moiety of BvgS, an intricate homodimer with a novel architecture. By combining site-directed mutagenesis, functional analyses and molecular modeling, we show that the conformation of the periplasmic moiety determines the state of BvgS activity. The intertwined structure of the periplasmic portion and the different conformation and dynamics of its mobile, membrane-distal VFT1 domains, and closed, membrane-proximal VFT2 domains, exert a conformational strain onto the transmembrane helices, which sets the cytoplasmic moiety in a kinase-on state by default corresponding to the virulent phase of the bacterium. Signaling the presence of negative signals perceived by the periplasmic domains implies a shift of BvgS to a distinct state of conformation and activity, corresponding to the avirulent phase. The response to negative modulation depends on the integrity of the periplasmic dimer, indicating that the shift to the kinase-off state implies a concerted conformational transition. This work lays the bases to understand virulence regulation in Bordetella. As homologous sensor-kinases control virulence features of diverse bacterial pathogens, the BvgS structure and mechanism may pave the way for new modes of targeted therapeutic interventions.


    Organizational Affiliation

    Center for Infection and Immunity (CIIL), Institut Pasteur de Lille, Lille, France; Center for Infection and Immunity (CIIL), University Lille North of France, Lille, France; UMR 8204, Centre National de la Recherche Scientifique (CNRS), Lille, France; U1019, Institut National de la Santé et de la Recherche Médicale (INSERM), Lille, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Virulence sensor protein BvgSA, B, C, D584Bordetella pertussis Tohama IMutation(s): 0 
Gene Names: BP1877bvgSbvgS (BP1877)
EC: 2.7.13.3
UniProt
Find proteins for P16575 (Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251))
Explore P16575 
Go to UniProtKB:  P16575
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.45α = 90
b = 285.82β = 90
c = 128.15γ = 90
Software Package:
Software NamePurpose
MAR345dtbdata collection
MOLREPphasing
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-02-11
    Type: Initial release
  • Version 1.1: 2015-03-25
    Changes: Database references