Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

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Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 34639.86 
• Atom Count: 2449 
• Residue Count: 316 
• Unique protein chains: 1

4AVH

Structure of the FimH lectin domain in the trigonal space group, in complex with a thioalkyl alpha-D-mannoside at 2.1 A resolution

• DOI: 10.2210/pdb4AVH/pdb

• Classification: CELL ADHESION
• Organism(s): Escherichia coli (strain K12)
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2012-05-26 Released: 2012-06-27 
• Deposition Author(s): Wellens, A., Lahmann, M., Touaibia, M., Vaucher, J., Oscarson, S., Roy, R., Remaut, H., Bouckaert, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.105 Å
• R-Value Free: 0.237 
• R-Value Work: 0.189 

Literature

The Tyrosine Gate as a Potential Entropic Lever in the Receptor-Binding Site of the Bacterial Adhesin Fimh.

Wellens, A., Lahmann, M., Touaibia, M., Vaucher, J., Oscarson, S., Roy, R., Remaut, H., Bouckaert, J.

(2012) Biochemistry 51: 4790

• PubMed: 22657089 
• DOI: 10.1021/bi300251r
• Primary Citation of Related Structures:  
  4AVK, 4AVJ, 4AVI, 4AV5, 4AV4, 4AV0, 4AUY, 4AUU


• PubMed Abstract: 
  

Uropathogenic Escherichia coli (UPEC) are the major causative agents of urinary tract infections. During infection, UPEC adhere to mannosylated glycoreceptors on the urothelium via the FimH adhesin located at the tip of type 1 pili. Synthetic FimH antiadhesives such as alkyl and phenyl α-D-mannopyranosides are thus ideal candidates for the chemical interception of this crucial step in pathogenesis. The crystal structures of the FimH lectin domain in its ligand-free form and in complexes with eight medium- and high-affinity mannopyranoside inhibitors are presented. The thermodynamic profiles of the FimH-inhibitor interactions indicate that the binding of FimH to α-D-mannopyranose is enthalpy-driven and has a negative entropic change. Addition of a hydrophobic aglycon influences the binding enthalpy and can induce a favorable entropic change. The alleviation of the entropic cost is at least in part explained by increased dynamics in the tyrosine gate (Tyr48 and Tyr137) of the FimH receptor-binding site upon binding of the ligand. Ligands with a phenyl group directly linked to the anomeric oxygen of α-D-mannose introduce the largest dynamics into the Tyr48 side chain, because conjugation with the anomeric oxygen of α-D-mannose forces the aromatic aglycon into a conformation that comes into close contact (≈2.65 Å) with Tyr48. A propargyl group in this position predetermines the orientation of the aglycon and significantly decreases affinity. FimH has the highest affinity for α-D-mannopyranosides substituted with hydrophobic aglycons that are compatible in shape and electrostatic properties to the tyrosine gate, such as heptyl α-D-mannose.

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Organizational Affiliation: 

Structural Molecular Microbiology, Vrije Universiteit Brussel, VIB, Brussels, Belgium.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
FIMH	A, B	158	Escherichia coli (strain K12)	Mutation(s): 0  Gene Names: fimH
Find proteins for P08191 (Escherichia coli (strain K12)) Go to UniProtKB:  P08191

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
FK9	A, B	PROPYL THIOPROPYL ALPHA-D-MANNOPYRANOSIDE C12 H24 O6 S VPHBOBPNUZWASC-GCHJQGSQSA-N
SO4	A	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
NI	A, B	NICKEL (II) ION Ni VEQPNABPJHWNSG-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
FK9	Kd: 59.5 nM BINDINGMOAD
FK9	Kd: 59.5 nM PDBBIND

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.105 Å
• R-Value Free: 0.237 
• R-Value Work: 0.189 
• Space Group: P 3₁ 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 91.310	α = 90.00
b = 91.310	β = 90.00
c = 80.300	γ = 120.00

Software Package:

Software Name	Purpose
XDS	data reduction
XSCALE	data scaling
PHENIX	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-05-26 
• Released Date: 2012-06-27 
• Deposition Author(s): Wellens, A., Lahmann, M., Touaibia, M., Vaucher, J., Oscarson, S., Roy, R., Remaut, H., Bouckaert, J.

Revision History 

• Version 1.0: 2012-06-27
  Type: Initial release
• Version 1.1: 2012-09-05
  Type: Database references