1KIU

FimH adhesin Q133N mutant-FimC chaperone complex with methyl-alpha-D-mannose


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.236 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis of tropism of Escherichia coli to the bladder during urinary tract infection.

Hung, C.S.Bouckaert, J.Hung, D.Pinkner, J.Widberg, C.DeFusco, A.Auguste, C.G.Strouse, R.Langermann, S.Waksman, G.Hultgren, S.J.

(2002) Mol.Microbiol. 44: 903-915

  • Primary Citation of Related Structures:  1KLF

  • PubMed Abstract: 
  • The first step in the colonization of the human urinary tract by pathogenic Escherichia coli is the mannose-sensitive binding of FimH, the adhesin present at the tip of type 1 pili, to the bladder epithelium. We elucidated crystallographically the in ...

    The first step in the colonization of the human urinary tract by pathogenic Escherichia coli is the mannose-sensitive binding of FimH, the adhesin present at the tip of type 1 pili, to the bladder epithelium. We elucidated crystallographically the interactions of FimH with D-mannose. The unique site binding pocket occupied by D-mannose was probed using site-directed mutagenesis. All but one of the mutants examined had greatly diminished mannose-binding activity and had also lost the ability to bind human bladder cells. The binding activity of the mono-saccharide D-mannose was delineated from this of mannotriose (Man(alpha 1-3)[Man(alpha 1-6)]Man) by generating mutants that abolished D-mannose binding but retained mannotriose binding activity. Our structure/function analysis demonstrated that the binding of the monosaccharide alpha-D-mannose is the primary bladder cell receptor for uropathogenic E. coli and that this event requires a highly conserved FimH binding pocket. The residues in the FimH mannose-binding pocket were sequenced and found to be invariant in over 200 uropathogenic strains of E. coli. Only enterohaemorrhagic E. coli (EHEC) possess a sequence variation within the mannose-binding pocket of FimH, suggesting a naturally occurring mechanism of attenuation in EHEC bacteria that would prevent them from being targeted to the urinary tract.


    Organizational Affiliation

    Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO 63110, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CHAPERONE PROTEIN FimC
A, C, E, G, I, K, M, O
205Escherichia coli (strain K12)Gene Names: fimC
Find proteins for P31697 (Escherichia coli (strain K12))
Go to UniProtKB:  P31697
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
FimH PROTEIN
B, D, F, H, J, L, N, P
279Escherichia 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
MMA
Query on MMA

Download SDF File 
Download CCD File 
B, D, F, H, J, L, N, P
O1-METHYL-MANNOSE
C7 H14 O6
HOVAGTYPODGVJG-VEIUFWFVSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
MAMIC50: 1900 nM (99) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.236 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 138.349α = 90.00
b = 138.334β = 89.98
c = 213.212γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSphasing
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-06-05
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance