4J3O

Crystal structure of the FimD usher traversed by the pilus tip complex assembly composed of FimC:FimF:FimG:FimH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.8 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.248 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and energetic basis of folded-protein transport by the FimD usher.

Geibel, S.Procko, E.Hultgren, S.J.Baker, D.Waksman, G.

(2013) Nature 496: 243-246

  • DOI: 10.1038/nature12007

  • PubMed Abstract: 
  • Type 1 pili, produced by uropathogenic Escherichia coli, are multisubunit fibres crucial in recognition of and adhesion to host tissues. During pilus biogenesis, subunits are recruited to an outer membrane assembly platform, the FimD usher, which cat ...

    Type 1 pili, produced by uropathogenic Escherichia coli, are multisubunit fibres crucial in recognition of and adhesion to host tissues. During pilus biogenesis, subunits are recruited to an outer membrane assembly platform, the FimD usher, which catalyses their polymerization and mediates pilus secretion. The recent determination of the crystal structure of an initiation complex provided insight into the initiation step of pilus biogenesis resulting in pore activation, but very little is known about the elongation steps that follow. Here, to address this question, we determine the structure of an elongation complex in which the tip complex assembly composed of FimC, FimF, FimG and FimH passes through FimD. This structure demonstrates the conformational changes required to prevent backsliding of the nascent pilus through the FimD pore and also reveals unexpected properties of the usher pore. We show that the circular binding interface between the pore lumen and the folded substrate participates in transport by defining a low-energy pathway along which the nascent pilus polymer is guided during secretion.


    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
Protein FimG
G
144Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fimG
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 P08190 (Escherichia coli (strain K12))
Go to UniProtKB:  P08190
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Protein FimH
H
279Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fimH
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 P08191 (Escherichia coli (strain K12))
Go to UniProtKB:  P08191
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Chaperone protein FimC
C
211Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fimC
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 P31697 (Escherichia coli (strain K12))
Go to UniProtKB:  P31697
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Protein FimF
F
154Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fimF
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 P08189 (Escherichia coli (strain K12))
Go to UniProtKB:  P08189
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Outer membrane usher protein FimD
D
843Escherichia 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: 3.8 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.248 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 122.360α = 90.00
b = 122.360β = 90.00
c = 328.460γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata scaling
ADSCdata collection
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-04-10
    Type: Initial release
  • Version 1.1: 2013-04-24
    Type: Database references