1TR7

FimH adhesin receptor binding domain from uropathogenic E. coli


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.170 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Receptor binding studies disclose a novel class of high-affinity inhibitors of the Escherichia coli FimH adhesin

Bouckaert, J.Berglund, J.Schembri, M.De Genst, E.Cools, L.Wuhrer, M.Hung, C.S.Pinkner, J.Slattegard, R.Zavialov, A.Choudhury, D.Langermann, S.Hultgren, S.J.Wyns, L.Klemm, P.Oscarson, S.Knight, S.D.De Greve, H.

(2005) Mol.Microbiol. 55: 441-455

  • DOI: 10.1111/j.1365-2958.2004.04415.x
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Mannose-binding type 1 pili are important virulence factors for the establishment of Escherichia coli urinary tract infections (UTIs). These infections are initiated by adhesion of uropathogenic E. coli to uroplakin receptors in the uroepithelium via ...

    Mannose-binding type 1 pili are important virulence factors for the establishment of Escherichia coli urinary tract infections (UTIs). These infections are initiated by adhesion of uropathogenic E. coli to uroplakin receptors in the uroepithelium via the FimH adhesin located at the tips of type 1 pili. Blocking of bacterial adhesion is able to prevent infection. Here, we provide for the first time binding data of the molecular events underlying type 1 fimbrial adherence, by crystallographic analyses of the FimH receptor binding domains from a uropathogenic and a K-12 strain, and affinity measurements with mannose, common mono- and disaccharides, and a series of alkyl and aryl mannosides. Our results illustrate that the lectin domain of the FimH adhesin is a stable and functional entity and that an exogenous butyl alpha-D-mannoside, bound in the crystal structures, exhibits a significantly better affinity for FimH (Kd = 0.15 microM) than mannose (Kd = 2.3 microM). Exploration of the binding affinities of alpha- d-mannosides with longer alkyl tails revealed affinities up to 5 nM. Aryl mannosides and fructose can also bind with high affinities to the FimH lectin domain, with a 100-fold improvement and 15-fold reduction in affinity, respectively, compared with mannose. Taken together, these relative FimH affinities correlate exceptionally well with the relative concentrations of the same glycans needed for the inhibition of adherence of type 1 piliated E. coli. We foresee that our findings will spark new ideas and initiatives for the development of UTI vaccines and anti-adhesive drugs to prevent anticipated and recurrent UTIs.


    Organizational Affiliation

    Laboratorium voor Ultrastructuur, Vrije Universiteit Brussel and Vlaams Interuniversitair Instituut voor Biotechnologie, Building E, Pleinlaan 2, 1050 Brussels, Belgium.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FimH protein
B, A
164Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fimH
Find proteins for P08191 (Escherichia coli (strain K12))
Go to UniProtKB:  P08191
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DEG
Query on DEG

Download SDF File 
Download CCD File 
A, B
BUTYL ALPHA-D-MANNOPYRANOSIDE
BUTYL-A-D-MANNOSE
C10 H20 O6
BZANQLIRVMZFOS-ZJDVBMNYSA-N
 Ligand Interaction
CAC
Query on CAC

Download SDF File 
Download CCD File 
A
CACODYLATE ION
dimethylarsinate
C2 H6 As O2
OGGXGZAMXPVRFZ-UHFFFAOYSA-M
 Ligand Interaction
MPD
Query on MPD

Download SDF File 
Download CCD File 
A
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
DEGKd: 150 nM BINDINGMOAD
DEGKd: 150 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.170 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 134.100α = 90.00
b = 29.200β = 92.20
c = 93.300γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
MOSFLMdata reduction
REFMACrefinement
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2005-05-03
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance