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Lookup NU author(s): Professor Michael Goodfellow
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An actinomycete, strain Acta 3026, isolated from mangrove soil was characterized and found to belong to the genus Nocardia. The strain produces two new cytotoxic metabolites, nocardichelins A (1) and B (2). Each of the compounds strongly inhibited human cell lines from gastric adenocarcinoma, breast carcinoma, and hepatocellular carcinoma with GI50 values in a low micromolar to nanomolar range. The structural characterization of the compounds was performed by mass spectrometry and NMR spectroscopy. The nocardichelins represent a new group of siderophores that combine the structural elements of mycobactin-type siderophores from mycobacteria and hydroxamate-type siderophores (desferrioxamine B) produced by streptomycetes. The chromazurol S assay, characteristic for iron(III) complexation, was positive, confirming the role as a siderophore.
Author(s): Schneider K, Rose I, Sussmuth RD, Vikeneswary V, Jones AL, Goodfellow M, Nicholson G, Bell W, Fiedler H-P
Publication type: Article
Publication status: Published
Journal: Journal of Natural Products
ISSN (print): 0163-3864
ISSN (electronic): 1520-6025
Publisher: American Chemical Society
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