5MCA

Crystal structure of FimH-LD R60P variant in the apo state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.604 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.147 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Conformational Switch of the Bacterial Adhesin FimH in the Absence of the Regulatory Domain - Engineering a Minimalistic Allosteric System.

Rabbani, S.Fiege, B.Eris, D.Silbermann, M.Jakob, R.P.Navarra, G.Maier, T.Ernst, B.

(2017) J. Biol. Chem. --: --

  • DOI: 10.1074/jbc.M117.802942

  • PubMed Abstract: 
  • For many biological processes such as ligand binding, enzymatic catalysis, or protein folding, allosteric regulation of protein conformation and dynamics is fundamentally important. One example is the bacterial adhesin FimH, where the C-terminal pili ...

    For many biological processes such as ligand binding, enzymatic catalysis, or protein folding, allosteric regulation of protein conformation and dynamics is fundamentally important. One example is the bacterial adhesin FimH, where the C-terminal pilin domain exerts negative allosteric control over binding of the N-terminal lectin domain to mannosylated ligands on host cells. When the lectin and pilin domains are separated under shear stress, the FimH-ligand interaction switches in a so-called catch-bond mechanism from low to high affinity state. So far, it has been assumed that the pilin domain is essential for the allosteric propagation within the lectin domain that would otherwise be conformationally rigid. To test this hypothesis, we generated mutants of the isolated FimH lectin domain and characterized their thermodynamic, kinetic, and structural properties using ITC, SPR, NMR and X-ray techniques. Intriguingly, some of the mutants mimicked the conformational and kinetic behaviors of the full-length protein and, even in absence of the pilin domain, conducted the crosstalk between allosteric sites and the mannoside binding pocket. Thus, these mutants represent a minimalistic allosteric system of FimH, useful for further mechanistic studies and antagonist design.


    Organizational Affiliation

    University of Basel, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein FimH
A
159Escherichia coli (strain K12)Gene Names: fimH
Find proteins for P08191 (Escherichia coli (strain K12))
Go to UniProtKB:  P08191
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.604 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.147 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 49.640α = 90.00
b = 57.193β = 90.00
c = 64.566γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
PHENIXrefinement
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-12-06
    Type: Initial release