Abstract
A new antibiotic named haneummycin (1) was isolated from a culture broth of marine-derived Streptomyces sp. KM77-8 by solvent extraction and HPLC using a C4 column. The structure of 1 was elucidated including relative stereochemistry as a new 22-membered macrolide lactam associated with a cyclopentanone and three sugars by various spectroscopic analyses, such as MS and NMR. Compound 1 displayed significant antibacterial activities against Gram-positive bacteria including vancomycin-resistant Enterococcus faecium (VRE) and methicillin-resistant Staphylococcus aureus (MRSA) with both MIC values of 8.0 µg ml−1.
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Acknowledgements
We express our thanks to Mr. Y. Furuichi of Tokyo University of Marine Science and Technology for sampling collection and isolation of strain KM77-8 and Mr. M. Ikenaga and Mr. T. Okada of Tokyo University of Marine Science and Technology for supporting fermentation section.
Funding
This research is supported by a grant for research and development of diagnostic methods and therapies for antimicrobial-resistant bacteria from the Japan Agency for Medical Research and Development (AMED) under grant number JP22fk0108133.
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Uemura, M., Kobayashi, K., Sato, N. et al. Haneummycin, a new 22-membered macrolide lactam antibiotic, produced by marine-derived Streptomyces sp. KM77-8. J Antibiot 76, 650–657 (2023). https://doi.org/10.1038/s41429-023-00648-5
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DOI: https://doi.org/10.1038/s41429-023-00648-5