4DWH

Structure of the major type 1 pilus subunit FIMA bound to the FIMC (2.5 A resolution)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.233 

wwPDB Validation 3D Report Full Report


This is version 1.3 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:  

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chaperone protein fimC
A, C
205Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fimC
Find proteins for P31697 (Escherichia coli (strain K12))
Go to UniProtKB:  P31697
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Type-1 fimbrial protein, A chain
B, D
143Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fimA (pilA)
Find proteins for P04128 (Escherichia coli (strain K12))
Go to UniProtKB:  P04128
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
PG4
Query on PG4

Download SDF File 
Download CCD File 
A, D
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
PGE
Query on PGE

Download SDF File 
Download CCD File 
C
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

Download SDF File 
Download CCD File 
A, B, C, D
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.233 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 122.370α = 90.00
b = 48.810β = 98.90
c = 113.480γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XSCALEdata scaling
PDB_EXTRACTdata extraction
RemDAqdata collection
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-30
    Type: Initial release
  • Version 1.1: 2012-08-01
    Type: Database references
  • Version 1.2: 2012-10-17
    Type: Database references
  • Version 1.3: 2017-10-11
    Type: Advisory, Data collection