The structure of a dimeric type II DAH7PS associated with pyocyanin biosynthesis in Pseudomonas aeruginosa

Experimental Data Snapshot

  • Resolution: 2.70 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.248 
  • R-Value Observed: 0.250 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Structural and functional characterisation of the entry point to pyocyanin biosynthesis inPseudomonas aeruginosadefines a new 3-deoxy-d-arabino-heptulosonate 7-phosphate synthase subclass.

Sterritt, O.W.Lang, E.J.M.Kessans, S.A.Ryan, T.M.Demeler, B.Jameson, G.B.Parker, E.J.

(2018) Biosci Rep 38

  • DOI: https://doi.org/10.1042/BSR20181605
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    In Pseudomonas aeruginosa ( Pae ), the shikimate pathway end product, chorismate, serves as the last common precursor for the biosynthesis of both primary aromatic metabolites, including phenylalanine, tyrosine and tryptophan, and secondary aromatic metabolites, including phenazine-1-carboxylic acid (PCA) and pyocyanin (PYO). The enzyme 3-deoxy-d- arabino -heptulosonate 7-phosphate synthase (DAH7PS) catalyses the first committed step of the shikimate pathway, en route to chorismate. P. aeruginosa expresses multiple, distinct DAH7PSs that are associated with either primary or secondary aromatic compound biosynthesis. Here we report the structure of a type II DAH7PS, encoded by phzC as part of the duplicated phenazine biosynthetic cluster, from P. aeruginosa (PAO1) revealing for the first time the structure of a type II DAH7PS involved in secondary metabolism. The omission of the structural elements α 2a and α 2b , relative to other characterised type II DAH7PSs, leads to the formation of an alternative, dimeric, solution-state structure for this type II DAH7PS with an oligomeric interface that has not previously been characterised and that does not facilitate the formation of aromatic amino acid allosteric binding sites. The sequence similarity and, in particular, the common N-terminal extension suggest a common origin for the type II DAH7PSs from P. aeruginosa. The results described in the present study support an expanded classification of the type II DAH7PSs as type II A and type II B based on sequence characteristics, structure and function of the resultant proteins, and on defined physiological roles within primary or secondary metabolism.

  • Organizational Affiliation

    Biomolecular Interaction Centre and School of Physical and Chemical Sciences, University of Canterbury, Christchurch 8041, New Zealand.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Phospho-2-dehydro-3-deoxyheptonate aldolase
A, B
405Pseudomonas aeruginosaMutation(s): 0 
Gene Names: phzCaroH_3AOY09_05716CAZ10_37830PAERUG_E15_London_28_01_14_08300
Find proteins for G3XCJ9 (Pseudomonas aeruginosa)
Explore G3XCJ9 
Go to UniProtKB:  G3XCJ9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupG3XCJ9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.70 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.248 
  • R-Value Observed: 0.250 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.757α = 90
b = 169.722β = 90
c = 170.55γ = 90
Software Package:
Software NamePurpose
autoXDSdata reduction
Aimlessdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-10-03
    Type: Initial release
  • Version 1.1: 2018-11-28
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-20
    Changes: Derived calculations
  • Version 1.3: 2023-10-04
    Changes: Data collection, Database references, Derived calculations, Refinement description