1QVE

Crystal structure of the truncated K122-4 pilin from Pseudomonas aeruginosa


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.139 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystallographic Analysis of the Pseudomonas aeruginosa Strain K122-4 Monomeric Pilin Reveals a Conserved Receptor-Binding Architecture

Audette, G.F.Irvin, R.T.Hazes, B.

(2004) Biochemistry 43: 11427-11435

  • DOI: 10.1021/bi048957s
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Adherence of pathogens to host cells is critical for the initiation of infection and is thus an attractive target for anti-infective therapeutics and vaccines. In the opportunistic human pathogen Pseudomonas aeruginosa, host-cell adherence is achieve ...

    Adherence of pathogens to host cells is critical for the initiation of infection and is thus an attractive target for anti-infective therapeutics and vaccines. In the opportunistic human pathogen Pseudomonas aeruginosa, host-cell adherence is achieved predominantly by type IV pili. Analysis of several clinical strains of P. aeruginosa reveals poor sequence conservation between pilin genes, including the residues in the receptor-binding site. Interestingly, the receptor-binding sites appear to retain a conserved surface epitope because all Pseudomonas type IV pili recognize the same receptor on the host cell and cross-reactive antibodies specific for the receptor-binding site exist. Here, we present the crystallographic analysis of two crystal forms of truncated pilin from P. aeruginosa strain K122-4 (DeltaK122-4) at 1.54 and 1.8 A resolution, respectively. The DeltaK122-4 structure is compared to other crystallographically determined type IV pilin structures and an NMR structure of DeltaK122-4 pilin. A comparison with the structure of the highly divergent P. aeruginosa strain K (DeltaPAK) pilin indicates that the receptor-binding loop in both pilins forms a shallow depression with a surface that is formed by main-chain atoms. Conservation of this putative binding site is independent of the sequence as long as the main-chain conformation is conserved and could therefore explain the shared receptor specificity and antibody cross reactivity of highly divergent Pseudomonas type IV pilins.


    Related Citations: 
    • Purification, crystallization and preliminary diffraction studies of the Pseudomonas aeruginosa strain K122-4 monomeric pilin
      Audette, G.F.,Irvin, R.T.,Hazes, B.
      (2003) Acta Crystallogr.,Sect.D 59: 1665


    Organizational Affiliation

    Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, Alberta, Canada, T6G 2H7.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fimbrial protein
A, B
126Pseudomonas aeruginosaMutation(s): 0 
Gene Names: pilA (fimA)
Find proteins for P17838 (Pseudomonas aeruginosa)
Go to UniProtKB:  P17838
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.139 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 40.184α = 66.39
b = 38.930β = 111.11
c = 37.228γ = 93.74
Software Package:
Software NamePurpose
MOSFLMdata reduction
REFMACrefinement
AMoREphasing
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-09-07
    Type: Initial release
  • Version 1.1: 2007-10-16
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance