3F6J

F17a-G lectin domain with bound GlcNAc(beta1-3)Gal


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Structural Sampling of Glycan Interaction Profiles Reveals Mucosal Receptors for Fimbrial Adhesins of Enterotoxigenic Escherichia coli

Lonardi, E.Moonens, K.Buts, L.de Boer, A.R.Olsson, J.D.M.Weiss, M.S.Fabre, E.Guerardel, Y.Deelder, A.M.Oscarson, S.Wuhrer, M.Bouckaert, J.

(2013) Biology 2: 894-917

  • DOI: 10.3390/biology2030894
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Fimbriae are long, proteinaceous adhesion organelles expressed on the bacterial envelope, evolutionarily adapted by Escherichia coli strains for the colonization of epithelial linings. Using glycan arrays of the Consortium for Functional Glycomics (C ...

    Fimbriae are long, proteinaceous adhesion organelles expressed on the bacterial envelope, evolutionarily adapted by Escherichia coli strains for the colonization of epithelial linings. Using glycan arrays of the Consortium for Functional Glycomics (CFG), the lectin domains were screened of the fimbrial adhesins F17G and FedF from enterotoxigenic E. coli (ETEC) and of the FimH adhesin from uropathogenic E. coli. This has led to the discovery of a more specific receptor for F17G, GlcNAcb1,3Gal. No significant differences emerged from the glycan binding profiles of the F17G lectin domains from five different E. coli strains. However, strain-dependent amino acid variations, predominantly towards the positively charged arginine, were indicated by sulfate binding in FedF and F17G crystal structures. For FedF, no significant binders could be observed on the CFG glycan array. Hence, a shotgun array was generated from microvilli scrapings of the distal jejunum of a 3-week old piglet about to be weaned. On this array, the blood group A type 1 hexasaccharide emerged as a receptor for the FedF lectin domain and remarkably also for F18-fimbriated E. coli. F17G was found to selectively recognize glycan species with a terminal GlcNAc, typifying intestinal mucins. In conclusion, F17G and FedF recognize long glycan sequences that could only be identified using the shotgun approach. Interestingly, ETEC strains display a large capacity to adapt their fimbrial adhesins to ecological niches via charge-driven interactions, congruent with binding to thick mucosal surfaces displaying an acidic gradient along the intestinal tract.


    Organizational Affiliation

    Center for Proteomics and Metabolomics, Leiden University Medical Center, P.O. Box 9600, RC Leiden 2300, The Netherlands. e.lonardi@lumc.nl.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
F17a-G
A
177Escherichia coliMutation(s): 0 
Gene Names: f17aG
Find proteins for Q99003 (Escherichia coli)
Go to UniProtKB:  Q99003
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MBG
Query on MBG

Download SDF File 
Download CCD File 
A
METHYL-BETA-GALACTOSE
C7 H14 O6
HOVAGTYPODGVJG-VOQCIKJUSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.191 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 42.801α = 90.00
b = 42.801β = 90.00
c = 284.628γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
DENZOdata reduction
PDB_EXTRACTdata extraction
MAR345data collection
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-11-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance
  • Version 1.2: 2013-08-28
    Type: Database references
  • Version 1.3: 2014-12-17
    Type: Atomic model, Derived calculations
  • Version 1.4: 2017-10-25
    Type: Advisory, Refinement description