4XOA

Crystal structure of a FimH*DsG complex from E.coli K12 in space group P1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.54 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.241 

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:  
    4XOC, 4XOD, 4XOE, 4XOA, 4XOB, 4XO8, 4XO9

  • 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 LengthOrganismDetailsImage
FimGBDFH14Escherichia coli K-12Mutation(s): 0 
Gene Names: fimGb4319JW4282
Find proteins for P08190 (Escherichia coli (strain K12))
Explore P08190 
Go to UniProtKB:  P08190
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Protein FimHACEG279Escherichia coli K-12Mutation(s): 0 
Gene Names: fimHb4320JW4283
Find proteins for P08191 (Escherichia coli (strain K12))
Explore P08191 
Go to UniProtKB:  P08191
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.54 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.241 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.53α = 101.54
b = 77.624β = 111.13
c = 78.107γ = 96.29
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

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