Evolution of Siderophore Pathways in Human Pathogenic Bacteria
journal contributionposted on 16.04.2014, 00:00 by Jakob Franke, Keishi Ishida, Christian Hertweck
Ornibactin and malleobactin are hydroxamate siderophores employed by human pathogenic bacteria belonging to the genus Burkholderia. Similarities in their structures and corresponding biosynthesis gene clusters strongly suggest an evolutionary relationship. Through gene coexpression and targeted gene manipulations, the malleobactin pathway was successfully morphed into an ornibactin assembly line. Such an evolutionary-guided approach has been unprecedented for nonribosomal peptide synthetases. Furthermore, the timing of amino acid acylation before peptide assembly, the absolute configuration of the ornibactin side chain, and the function of the acyl transferase were elucidated. Beyond providing a proof of principle for the rational design of siderophore pathways, a compelling model for the evolution of virulence traits is presented.
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ornibactin side chainpeptide assemblygenus Burkholderiahydroxamate siderophoresgene manipulationsacyl transferasesiderophore pathwaysornibactin assembly linemalleobactin pathwaynonribosomal peptide synthetasesevolutionSiderophore Pathwaysvirulence traitsacid acylationgene coexpressionbiosynthesis gene clustersHuman Pathogenic BacteriaOrnibactin