1O9Z

F17-aG lectin domain from Escherichia coli (ligand free)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The Fimbrial Adhesin F17-G of Enterotoxigenic Escherichia Coli Has an Immunoglobulin-Like Lectin Domain that Binds N-Acetylglucosamine

Buts, L.Bouckaert, J.De Genst, E.Loris, R.Oscarson, S.Lahmann, M.Messens, J.Brosens, E.Wyns, L.De Greve, H.

(2003) Mol Microbiol 49: 705

  • DOI: 10.1046/j.1365-2958.2003.03600.x
  • Primary Citation of Related Structures:  
    1O9Z, 1O9W, 1O9V

  • PubMed Abstract: 
  • The F17-G adhesin at the tip of flexible F17 fimbriae of enterotoxigenic Escherichia coli mediates binding to N-acetyl-beta-D-glucosamine-presenting receptors on the microvilli of the intestinal epithelium of ruminants. We report the 1.7 A resolution ...

    The F17-G adhesin at the tip of flexible F17 fimbriae of enterotoxigenic Escherichia coli mediates binding to N-acetyl-beta-D-glucosamine-presenting receptors on the microvilli of the intestinal epithelium of ruminants. We report the 1.7 A resolution crystal structure of the lectin domain of F17-G, both free and in complex with N-acetylglucosamine. The monosaccharide is bound on the side of the ellipsoid-shaped protein in a conserved site around which all natural variations of F17-G are clustered. A model is proposed for the interaction between F17-fimbriated E. coli and microvilli with enhanced affinity compared with the binding constant we determined for F17-G binding to N-acetylglucosamine (0.85 mM-1). Unexpectedly, the F17-G structure reveals that the lectin domains of the F17-G, PapGII and FimH fimbrial adhesins all share the immunoglobulin-like fold of the structural components (pilins) of their fimbriae, despite lack of any sequence identity. Fold comparisons with pilin and chaperone structures of the chaperone/usher pathway highlight the central role of the C-terminal beta-strand G of the immunoglobulin-like fold and provides new insights into pilus assembly, function and adhesion.


    Related Citations: 
    • Solving the Phase Problem for Carbohydrate -Binding Proteins Using Selenium Derivatives of Their Ligands: A Case Study Involving the Bacterial F17-G Adhesin
      Buts, L., Loris, R., De Genst, E., Oscarson, S., Lahmann, M., Messens, J., Brosens, E., Wyns, L., De Greve, H., Bouckaert, J.
      (2003) Acta Crystallogr D Biol Crystallogr 59: 1012
    • Identification, Characterization and Nucleotide Sequence of the F17G Gene, which Determines Receptor Binding of Escherichia Coli F17 Fimbriae
      Lintermans, P.F., Bertels, A., Schlicker, C., Deboeck, F., Charlier, G., Pohl, P., Norgren, M., Normark, S., Van Montagu, M., De Greve, H.
      (1991) J Bacteriol 173: 3366

    Organizational Affiliation

    Department of Ultrastructure, Institute for Molecular Biology, Vrije Universiteit Brussel, Vlaams Interuniversitair Instituut voor Biotechnologie, Brussels, Belgium.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
F17-AG LECTIN DOMAINA177Escherichia coliMutation(s): 0 
Gene Names: f17aG
Find proteins for Q99003 (Escherichia coli)
Explore Q99003 
Go to UniProtKB:  Q99003
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.211 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.862α = 90
b = 42.862β = 90
c = 285.702γ = 120
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-05-29
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-07-24
    Changes: Data collection