3OHN

Crystal structure of the FimD translocation domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.011 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the FimD usher bound to its cognate FimC-FimH substrate.

Phan, G.Remaut, H.Wang, T.Allen, W.J.Pirker, K.F.Lebedev, A.Henderson, N.S.Geibel, S.Volkan, E.Yan, J.Kunze, M.B.Pinkner, J.S.Ford, B.Kay, C.W.Li, H.Hultgren, S.J.Thanassi, D.G.Waksman, G.

(2011) Nature 474: 49-53

  • DOI: 10.1038/nature10109
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Type 1 pili are the archetypal representative of a widespread class of adhesive multisubunit fibres in Gram-negative bacteria. During pilus assembly, subunits dock as chaperone-bound complexes to an usher, which catalyses their polymerization and med ...

    Type 1 pili are the archetypal representative of a widespread class of adhesive multisubunit fibres in Gram-negative bacteria. During pilus assembly, subunits dock as chaperone-bound complexes to an usher, which catalyses their polymerization and mediates pilus translocation across the outer membrane. Here we report the crystal structure of the full-length FimD usher bound to the FimC-FimH chaperone-adhesin complex and that of the unbound form of the FimD translocation domain. The FimD-FimC-FimH structure shows FimH inserted inside the FimD 24-stranded β-barrel translocation channel. FimC-FimH is held in place through interactions with the two carboxy-terminal periplasmic domains of FimD, a binding mode confirmed in solution by electron paramagnetic resonance spectroscopy. To accommodate FimH, the usher plug domain is displaced from the barrel lumen to the periplasm, concomitant with a marked conformational change in the β-barrel. The amino-terminal domain of FimD is observed in an ideal position to catalyse incorporation of a newly recruited chaperone-subunit complex. The FimD-FimC-FimH structure provides unique insights into the pilus subunit incorporation cycle, and captures the first view of a protein transporter in the act of secreting its cognate substrate.


    Organizational Affiliation

    Institute of Structural and Molecular Biology, University College London and Birkbeck College, Malet Street, London WC1E 7HX, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Outer membrane usher protein FimD
A, B
558Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fimD
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric
Protein: 
P pilus FimD usher bound to FimC:FimH substrate
Find proteins for P30130 (Escherichia coli (strain K12))
Go to UniProtKB:  P30130
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.011 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.230 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 50.022α = 63.92
b = 87.132β = 88.43
c = 95.883γ = 76.94
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data collection
PHASERphasing
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2010-08-17 
  • Released Date: 2011-06-01 
  • Deposition Author(s): Wang, T., Li, H.

Revision History 

  • Version 1.0: 2011-06-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2012-03-28
    Type: Database references