4XO9

Crystal structure of a FimH*DsG complex from E.coli K12 in space group C2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.14 Å
  • R-Value Free: 0.143 
  • R-Value Work: 0.125 

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
Protein FimH
A
279Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fimH
Find proteins for P08191 (Escherichia coli (strain K12))
Go to UniProtKB:  P08191
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Minor component of type 1 fimbriae
B
14Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fimG
Find proteins for P08190 (Escherichia coli (strain K12))
Go to UniProtKB:  P08190
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.14 Å
  • R-Value Free: 0.143 
  • R-Value Work: 0.125 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 99.490α = 90.00
b = 35.620β = 105.89
c = 72.890γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
XDSdata reduction
PHENIXrefinement
XSCALEdata scaling

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