2XWX

Vibrio cholerae colonization factor GbpA crystal structure


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Vibrio Cholerae Colonization Factor Gbpa Possesses a Modular Structure that Governs Binding to Different Host Surfaces.

Wong, E.Vaaje-Kolstad, G.Ghosh, A.Hurtado-Guerrero, R.Konarev, P.V.Ibrahim, A.F.M.Svergun, D.I.Eijsink, V.G.H.Chatterjee, N.S.Van Aalten, D.M.F.

(2012) Plos Pathog. 8: 2373

  • DOI: 10.1371/journal.ppat.1002373

  • PubMed Abstract: 
  • Vibrio cholerae is a bacterial pathogen that colonizes the chitinous exoskeleton of zooplankton as well as the human gastrointestinal tract. Colonization of these different niches involves an N-acetylglucosamine binding protein (GbpA) that has been r ...

    Vibrio cholerae is a bacterial pathogen that colonizes the chitinous exoskeleton of zooplankton as well as the human gastrointestinal tract. Colonization of these different niches involves an N-acetylglucosamine binding protein (GbpA) that has been reported to mediate bacterial attachment to both marine chitin and mammalian intestinal mucin through an unknown molecular mechanism. We report structural studies that reveal that GbpA possesses an unusual, elongated, four-domain structure, with domains 1 and 4 showing structural homology to chitin binding domains. A glycan screen revealed that GbpA binds to GlcNAc oligosaccharides. Structure-guided GbpA truncation mutants show that domains 1 and 4 of GbpA interact with chitin in vitro, whereas in vivo complementation studies reveal that domain 1 is also crucial for mucin binding and intestinal colonization. Bacterial binding studies show that domains 2 and 3 bind to the V. cholerae surface. Finally, mouse virulence assays show that only the first three domains of GbpA are required for colonization. These results explain how GbpA provides structural/functional modular interactions between V. cholerae, intestinal epithelium and chitinous exoskeletons.


    Organizational Affiliation

    Division of Molecular Microbiology, College of Life Sciences, University of Dundee, Dundee, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLCNAC-BINDING PROTEIN A
A, B
391Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)Gene Names: gbpA
Find proteins for Q9KLD5 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Go to UniProtKB:  Q9KLD5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.207 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 55.955α = 90.00
b = 120.182β = 108.41
c = 67.177γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
PHENIXrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-11-16
    Type: Initial release
  • Version 1.1: 2012-08-29
    Type: Database references, Structure summary
  • Version 1.2: 2015-04-15
    Type: Source and taxonomy, Structure summary