A new catecholate-containing siderophore, labrenzbactin (1), was isolated from the fermentation broth of a coral-associated bacterium Labrenzia sp. The structure and absolute configuration of 1 was determined by spectroscopic methods and Marfey’s analysis. Overall, 1 showed antimicrobial activity against Ralstonia solanacearum SUPP1541 and Micrococcus luteus ATCC9341 with MIC values of 25 and 50 µg ml−1, respectively, and cytotoxicity against P388 murine leukemia cells with an IC50 of 13 µM.
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We thank Prof. Yasufumi Hikichi and Dr. Ayami Kanda at Kochi University for providing R. solanacearum SUPP1541.
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Raj Sharma, A., Zhou, T., Harunari, E. et al. Labrenzbactin from a coral-associated bacterium Labrenzia sp.. J Antibiot 72, 634–639 (2019). https://doi.org/10.1038/s41429-019-0192-x
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