Advertisement

Archives of Microbiology

, Volume 174, Issue 3, pp 135–142 | Cite as

Pyoverdines: pigments, siderophores and potential taxonomic markers of fluorescent Pseudomonas species

  • Jean-Marie Meyer
Mini-Review

Abstract.

Pyoverdine, the yellow-green, water-soluble, fluorescent pigment of the fluorescent Pseudomonas species, is a powerful iron(III) scavenger and an efficient iron(III) transporter. As a fluorescent pigment, it represents a ready marker for bacterial differentiation and, as a siderophore, it plays an important physiological function in satisfying the absolute iron requirement of these strictly aerobic bacteria. Close to 40 structurally different pyoverdines have been identified to date, each characterized by a different peptidic part of the molecule and by a very narrow specificity as an iron transporter for Pseudomonas species, usually restricted to the producer strain or to strains producing an identical compound. Cross-reactivity does occur, however, for pyoverdines exhibiting partial identity at the peptide chain level, suggesting some information on the receptor-recognition site of the molecule. With the recent description of an operonic cluster of four genes involved in the synthesis of the chromophoric part of the molecule, a total of seven pyoverdine biosynthetic genes have been identified so far in Pseudomonas aeruginosa PAO1. Although the precise function of the gene products needs further clarification, a biosynthetic pathway based on a multienzyme thiotemplate mechanism allowing a step-by-step synthesis of the whole chromopeptide molecule can be postulated. A promising future is expected from recent developments which indicate that pyoverdines might be considered as potent and easy-to-handle taxonomic markers for the fluorescent species of the genus Pseudomonas.

Pseudomonas Pigment Pyoverdine Siderophore Iron Siderotyping Taxonomy 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag 2000

Authors and Affiliations

  • Jean-Marie Meyer
    • 1
  1. 1.Laboratoire de Microbiologie et Génétique, UPRES-A 7010, Université Louis-Pasteur, 28 rue Goethe, 67000 Strasbourg, France

Personalised recommendations