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In the course of the purification procedure of pyoverdins produced by Pseudomonas aeruginosa ATCC 15692 in large batch cultures, a minor peptidic chlorinated siderophore was isolated. This compound possesses the same peptidic moiety as the three major pyoverdins isolated from this strain, but it is bound to a chlorinated chromophore derived from 5-chloro-2,3-diamino-6,7-dihydroxyquinoline. A mechanism...
The structure of two pyoverdins produced in iron-deficient cultures of Pseudomonas fluorescens CHAO, a bacterium responsible for suppression of fungal diseases in plant roots, was elucidated using essentially FAB-MS and homonuclear and heteronuclear 2D NMR techniques. It is a partly cyclic chromopeptide: chromophore-Asp-OHOrn-Lys-cyclo-(Thr-Ala-Ala-OHOrn-Lys) forming a sixteen-membered lactone ring.
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