1DZO

Truncated PAK pilin from Pseudomonas aeruginosa


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.63 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.153 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of Pseudomonas Aeruginosa Pak Pilin Suggests a Main-Chain-Dominated Mode of Receptor Binding

Hazes, B.Sastry, P.A.Hayakawa, K.Read, R.J.Irvin, R.T.

(2000) J.Mol.Biol. 299: 1005

  • DOI: 10.1006/jmbi.2000.3801

  • PubMed Abstract: 
  • Fibers of pilin monomers (pili) form the dominant adhesin of Pseudomonas aeruginosa, and they play an important role in infections by this opportunistic bacterial pathogen. Blocking adhesion is therefore a target for vaccine development. The receptor ...

    Fibers of pilin monomers (pili) form the dominant adhesin of Pseudomonas aeruginosa, and they play an important role in infections by this opportunistic bacterial pathogen. Blocking adhesion is therefore a target for vaccine development. The receptor-binding site is located in a C-terminal disulphide-bonded loop of each pilin monomer, but functional binding sites are displayed only at the tip of the pilus. A factor complicating vaccination is that different bacterial strains produce distinct, and sometimes highly divergent, pilin variants. It is surprising that all strains still appear to bind a common receptor, asialo-GM1. Here, we present the 1.63 A crystal structure of pilin from P. aeruginosa strain PAK. The structure shows that the proposed receptor-binding site is formed by two beta-turns that create a surface dominated by main-chain atoms. Receptor specificity could therefore be maintained, whilst allowing side-chain variation, if the main-chain conformation is conserved. The location of the binding site relative to the proposed packing of the pilus fiber raises new issues and suggests that the current fiber model may have to be reconsidered. Finally, the structure of the C-terminal disulphide-bonded loop will provide the template for the structure-based design of a consensus sequence vaccine.


    Organizational Affiliation

    Department of Medical Microbiology and Immunology, Canadian Bacterial Diseases Network, University of Alberta, Edmonton, Alberta, T6G 2H7, Canada. bart.hazes@ualberta.ca




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TYPE IV PILIN
A
123Pseudomonas aeruginosaGene Names: pilA (fimA)
Find proteins for P02973 (Pseudomonas aeruginosa)
Go to UniProtKB:  P02973
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.63 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.153 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 38.114α = 90.00
b = 38.114β = 90.00
c = 149.775γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
DMphasing
MOSFLMdata reduction
REFMACrefinement
SOLVEphasing
ARP/wARPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2000-03-06 
  • Released Date: 2000-06-11 
  • Deposition Author(s): Hazes, B., Read, R.J.

Revision History 

  • Version 1.0: 2000-06-11
    Type: Initial release
  • Version 1.1: 2014-02-05
    Type: Derived calculations, Non-polymer description, Other, Source and taxonomy, Structure summary, Version format compliance
  • Version 1.2: 2017-06-28
    Type: Data collection