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: 2.40 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.151 
  • R-Value Observed: 0.152 

wwPDB Validation   3D Report Full Report



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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FimH proteinA279Escherichia coli 536Mutation(s): 0 
Gene Names: ECP_4655
Find proteins for A0A454AB91 (Escherichia coli O6:K15:H31 (strain 536 / UPEC))
Explore A0A454AB91 
Go to UniProtKB:  A0A454AB91
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
FimG proteinB14Escherichia coli 536Mutation(s): 0 
Gene Names: ECP_4654
Find proteins for A0A140UH97 (Escherichia coli O6:K15:H31 (strain 536 / UPEC))
Explore A0A140UH97 
Go to UniProtKB:  A0A140UH97
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
KGM
Query on KGM

Download Ideal Coordinates CCD File 
A
heptyl alpha-D-mannopyranoside
C13 H26 O6
NIDYWHLDTIVRJT-BNDIWNMDSA-N
 Ligand Interaction
CAC
Query on CAC

Download Ideal Coordinates CCD File 
A
CACODYLATE ION
C2 H6 As O2
OGGXGZAMXPVRFZ-UHFFFAOYSA-M
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
KGMKd:  9900   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.151 
  • R-Value Observed: 0.152 
  • Space Group: P 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 128.36α = 90
b = 128.36β = 90
c = 128.36γ = 90
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
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Derived calculations, Structure summary