3SQB

Structure of the major type 1 pilus subunit FimA bound to the FimC chaperone


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.300 
  • R-Value Work: 0.261 
  • R-Value Observed: 0.262 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Quality control of disulfide bond formation in pilus subunits by the chaperone FimC.

Crespo, M.D.Puorger, C.Scharer, M.A.Eidam, O.Grutter, M.G.Capitani, G.Glockshuber, R.

(2012) Nat Chem Biol 8: 707-713

  • DOI: 10.1038/nchembio.1019
  • Primary Citation of Related Structures:  
    3SQB, 4DWH

  • PubMed Abstract: 
  • Type 1 pili from uropathogenic Escherichia coli are filamentous, noncovalent protein complexes mediating bacterial adhesion to the host tissue. All structural pilus subunits are homologous proteins sharing an invariant disulfide bridge. Here we show ...

    Type 1 pili from uropathogenic Escherichia coli are filamentous, noncovalent protein complexes mediating bacterial adhesion to the host tissue. All structural pilus subunits are homologous proteins sharing an invariant disulfide bridge. Here we show that disulfide bond formation in the unfolded subunits, catalyzed by the periplasmic oxidoreductase DsbA, is required for subunit recognition by the assembly chaperone FimC and for FimC-catalyzed subunit folding. FimC thus guarantees quantitative disulfide bond formation in each of the up to 3,000 subunits of the pilus. The X-ray structure of the complex between FimC and the main pilus subunit FimA and the kinetics of FimC-catalyzed FimA folding indicate that FimC accelerates folding of pilus subunits by lowering their topological complexity. The kinetic data, together with the measured in vivo concentrations of DsbA and FimC, predict an in vivo half-life of 2 s for oxidative folding of FimA in the periplasm.


    Organizational Affiliation

    Department of Biology, Institute of Molecular Biology and Biophysics, Swiss Federal Institute of Technology Zurich, Zurich, Switzerland.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Chaperone protein fimCACEG211Escherichia coliMutation(s): 0 
Gene Names: b4316fimCJW4279
Find proteins for P31697 (Escherichia coli (strain K12))
Explore P31697 
Go to UniProtKB:  P31697
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Type-1 fimbrial protein, A chainBDFH152Escherichia coliMutation(s): 0 
Gene Names: b4314fimAJW4277pilA
Find proteins for P04128 (Escherichia coli (strain K12))
Explore P04128 
Go to UniProtKB:  P04128
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TRS
Query on TRS

Download CCD File 
C, D
2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
C4 H12 N O3
LENZDBCJOHFCAS-UHFFFAOYSA-O
 Ligand Interaction
PEG
Query on PEG

Download CCD File 
A, B
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download CCD File 
C, D
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.300 
  • R-Value Work: 0.261 
  • R-Value Observed: 0.262 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.62α = 90
b = 142.18β = 90
c = 171.75γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-30
    Type: Initial release
  • Version 1.1: 2012-08-01
    Changes: Database references
  • Version 1.2: 2012-10-17
    Changes: Database references