2J2Z

X-Ray Structure of the Chaperone PapD in complex with the Pilus terminator subunit PapH at 2.3 Angstrom resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular Mechanism of P Pilus Termination in Uropathogenic Escherichia Coli.

Verger, D.Miller, E.Remaut, H.Waksman, G.Hultgren, S.

(2006) Embo Rep. 7: 1228

  • DOI: 10.1038/sj.embor.7400833

  • PubMed Abstract: 
  • P pili are important adhesive fibres that are assembled by the conserved chaperone-usher pathway. During pilus assembly, the subunits are incorporated into the growing fibre by the donor-strand exchange mechanism, whereby the beta-strand of the chape ...

    P pili are important adhesive fibres that are assembled by the conserved chaperone-usher pathway. During pilus assembly, the subunits are incorporated into the growing fibre by the donor-strand exchange mechanism, whereby the beta-strand of the chaperone, which complements the incomplete immunoglobulin fold of each subunit, is displaced by the amino-terminal extension of an incoming subunit in a zip-in-zip-out exchange process that is initiated at the P5 pocket, an exposed hydrophobic pocket in the groove of the subunit. In vivo, termination of P pilus growth requires a specialized subunit, PapH. Here, we show that PapH is incorporated at the base of the growing pilus, where it is unable to undergo donor-strand exchange. This inability is not due to a stronger PapD-PapH interaction, but to a lack of a P5 initiator pocket in the PapH structure, suggesting that PapH terminates pilus growth because it is lacking the initiation point by which donor-strand exchange proceeds.


    Organizational Affiliation

    Institute of Structural Molecular Biology, University College London, Birkbeck College, Malet Street, London WC1E 7HX, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CHAPERONE PROTEIN PAPD
A
218Escherichia coliMutation(s): 0 
Gene Names: prfD (papD, papD_1, papD_2, papD_3, papD_4)
Find proteins for Q7ATU9 (Escherichia coli)
Go to UniProtKB:  Q7ATU9
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PAP FIMBRIAL MINOR PILIN PROTEIN
B
173Escherichia coliMutation(s): 0 
Gene Names: papH
Find proteins for P07111 (Escherichia coli)
Go to UniProtKB:  P07111
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CO
Query on CO

Download SDF File 
Download CCD File 
B
COBALT (II) ION
Co
XLJKHNWPARRRJB-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.209 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 103.460α = 90.00
b = 149.300β = 90.00
c = 82.840γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
MOSFLMdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-11-08
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance