4XOE

Crystal structure of a FimH*DsG complex from E.coli F18 with bound heptyl alpha-D-mannopyrannoside


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.151 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Catch-bond mechanism of the bacterial adhesin FimH.

Sauer, M.M.Jakob, R.P.Eras, J.Baday, S.Eris, D.Navarra, G.Berneche, S.Ernst, B.Maier, T.Glockshuber, R.

(2016) Nat Commun 7: 10738-10738

  • DOI: 10.1038/ncomms10738
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Ligand-receptor interactions that are reinforced by mechanical stress, so-called catch-bonds, play a major role in cell-cell adhesion. They critically contribute to widespread urinary tract infections by pathogenic Escherichia coli strains. These pat ...

    Ligand-receptor interactions that are reinforced by mechanical stress, so-called catch-bonds, play a major role in cell-cell adhesion. They critically contribute to widespread urinary tract infections by pathogenic Escherichia coli strains. These pathogens attach to host epithelia via the adhesin FimH, a two-domain protein at the tip of type I pili recognizing terminal mannoses on epithelial glycoproteins. Here we establish peptide-complemented FimH as a model system for fimbrial FimH function. We reveal a three-state mechanism of FimH catch-bond formation based on crystal structures of all states, kinetic analysis of ligand interaction and molecular dynamics simulations. In the absence of tensile force, the FimH pilin domain allosterically accelerates spontaneous ligand dissociation from the FimH lectin domain by 100,000-fold, resulting in weak affinity. Separation of the FimH domains under stress abolishes allosteric interplay and increases the affinity of the lectin domain. Cell tracking demonstrates that rapid ligand dissociation from FimH supports motility of piliated E. coli on mannosylated surfaces in the absence of shear force.


    Organizational Affiliation

    Institute of Molecular Biology and Biophysics, Department of Biology, ETH, Zurich, Otto-Stern-Weg 5, 8093 Zurich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FimH protein
A
279N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
FimG protein
B
14Escherichia coli O6:K15:H31 (strain 536 / UPEC)Mutation(s): 0 
Find proteins for A0A140UH97 (Escherichia coli O6:K15:H31 (strain 536 / UPEC))
Go to UniProtKB:  A0A140UH97
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
KGM
Query on KGM

Download SDF File 
Download CCD File 
A
Heptyl Alpha-D-mannopyrannoside
C13 H26 O6
NIDYWHLDTIVRJT-BNDIWNMDSA-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
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
KGMKd: 9900 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.151 
  • Space Group: P 21 3
Unit Cell:
Length (Å)Angle (°)
a = 128.360α = 90.00
b = 128.360β = 90.00
c = 128.360γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
XDSdata reduction
XSCALEdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-01-27
    Type: Initial release
  • Version 1.1: 2016-03-16
    Type: Database references