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: https://doi.org/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 catalyses their polymerization and mediates pilus secretion ...

    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 FimGA [auth G]144Escherichia coli K-12Mutation(s): 0 
Gene Names: fimGb4319JW4282
Membrane Entity: Yes 
UniProt
Find proteins for P08190 (Escherichia coli (strain K12))
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Go to UniProtKB:  P08190
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UniProt GroupP08190
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Protein FimHB [auth H]279Escherichia coli K-12Mutation(s): 0 
Gene Names: fimHb4320JW4283
Membrane Entity: Yes 
UniProt
Find proteins for P08191 (Escherichia coli (strain K12))
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Go to UniProtKB:  P08191
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UniProt GroupP08191
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Chaperone protein FimCC211Escherichia coli K-12Mutation(s): 0 
Gene Names: fimCb4316JW4279
Membrane Entity: Yes 
UniProt
Find proteins for P31697 (Escherichia coli (strain K12))
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UniProt GroupP31697
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Protein FimFD [auth F]154Escherichia coli K-12Mutation(s): 0 
Gene Names: fimFb4318JW4281
Membrane Entity: Yes 
UniProt
Find proteins for P08189 (Escherichia coli (strain K12))
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UniProt GroupP08189
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Outer membrane usher protein FimDE [auth D]843Escherichia coli K-12Mutation(s): 0 
Gene Names: fimDb4317JW5780
Membrane Entity: Yes 
UniProt
Find proteins for P30130 (Escherichia coli (strain K12))
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Go to UniProtKB:  P30130
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UniProt GroupP30130
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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  (Full details and data files)

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