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: 3.80 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.248 
  • R-Value Observed: 0.250 

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
  • Primary Citation of Related Structures:  
    4J3O

  • 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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein FimGG144Escherichia coli K-12Mutation(s): 0 
Gene Names: fimGb4319JW4282
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric
Protein: 
P pilus FimD usher in complex with FimC:FimF:FimG:FimH
Find proteins for P08190 (Escherichia coli (strain K12))
Explore P08190 
Go to UniProtKB:  P08190
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Protein FimHH279Escherichia coli K-12Mutation(s): 0 
Gene Names: fimHb4320JW4283
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric
Protein: 
P pilus FimD usher in complex with FimC:FimF:FimG:FimH
Find proteins for P08191 (Escherichia coli (strain K12))
Explore P08191 
Go to UniProtKB:  P08191
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Chaperone protein FimCC211Escherichia coli K-12Mutation(s): 0 
Gene Names: fimCb4316JW4279
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric
Protein: 
P pilus FimD usher in complex with FimC:FimF:FimG:FimH
Find proteins for P31697 (Escherichia coli (strain K12))
Explore P31697 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Protein FimFF154Escherichia coli K-12Mutation(s): 0 
Gene Names: fimFb4318JW4281
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric
Protein: 
P pilus FimD usher in complex with FimC:FimF:FimG:FimH
Find proteins for P08189 (Escherichia coli (strain K12))
Explore P08189 
Go to UniProtKB:  P08189
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Outer membrane usher protein FimDD843Escherichia coli K-12Mutation(s): 0 
Gene Names: fimDb4317JW5780
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric
Protein: 
P pilus FimD usher in complex with FimC:FimF:FimG:FimH
Find proteins for P30130 (Escherichia coli (strain K12))
Explore P30130 
Go to UniProtKB:  P30130
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.80 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.248 
  • R-Value Observed: 0.250 
  • Space Group: P 42 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 122.36α = 90
b = 122.36β = 90
c = 328.46γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
PHENIXrefinement
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

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