Crystal Structure of Bordetella pertussis BvgS periplasmic VFT2 domain

Experimental Data Snapshot

  • Resolution: 2.04 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.178 

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Periplasmic domain of the sensor-kinase BvgS reveals a new paradigm for the Venus flytrap mechanism.

Herrou, J.Bompard, C.Wintjens, R.Dupre, E.Willery, E.Villeret, V.Locht, C.Antoine, R.Jacob-Dubuisson, F.

(2010) Proc Natl Acad Sci U S A 107: 17351-17355

  • DOI: https://doi.org/10.1073/pnas.1006267107
  • Primary Citation of Related Structures:  
    3MPK, 3MPL

  • PubMed Abstract: 

    Two-component sensory transduction systems control important bacterial programs. In Bordetella pertussis, expression of the virulence regulon is controlled by the unorthodox BvgAS two-component system. BvgS is the prototype of a family of sensor-kinases that harbor periplasmic domains homologous to bacterial solute-binding proteins. Although BvgAS is active under laboratory conditions, no activating signal has been identified, only negative modulators. Here we show that the second periplasmic domain of BvgS interacts with modulators and adopts a Venus flytrap (VFT) fold. X-ray crystallography reveals that the two lobes of VFT2 delimitate a ligand-binding cavity enclosing fortuitous ligands. Most substitutions of putative ligand-binding residues in the VFT2 cavity keep BvgS active, and alteration of the cavity's electrostatic potential affects responsiveness to modulation. The crystal structure of this VFT2 variant conferring constitutive kinase activity to BvgS shows a closed cavity with another nonspecific ligand. Thus, VFT2 is closed and active without a specific agonist ligand, in contrast to typical VFTs. Modulators are antagonists of VFT2 that interrupt signaling. BvgAS is active for most of the B. pertussis infectious cycle, consistent with the proposed mechanism.

  • Organizational Affiliation

    Institut National de la Santé et de la Recherche Médicale, Center for Infection and Immunity of Lille, F-59019 Lille, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Virulence sensor protein bvgS267Bordetella pertussis Tohama IMutation(s): 0 
Gene Names: BP1877bvgS
Find proteins for P16575 (Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251))
Explore P16575 
Go to UniProtKB:  P16575
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP16575
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.04 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.178 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.95α = 90
b = 95.41β = 90
c = 64.02γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-10-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2024-02-21
    Changes: Data collection, Database references, Derived calculations