2. Academic Validation
  3. Medermycin-Type Naphthoquinones from the Marine-Derived Streptomyces sp. XMA39

Medermycin-Type Naphthoquinones from the Marine-Derived Streptomyces sp. XMA39

  • J Nat Prod. 2018 Sep 28;81(9):2120-2124. doi: 10.1021/acs.jnatprod.8b00544.
Yong-Jun Jiang 1,  Da-Shan Zhang 1,  Hao-Jian Zhang 1,  Jia-Qi Li 1,  Wan-Jing Ding 1,  Cheng-Dong Xu 1,  Zhong-Jun Ma 1 2
Affiliations

Affiliations

  • 1 Institute of Marine Biology, Ocean College , Zhejiang University , Zhoushan 316021 , People's Republic of China.
  • 2 Ocean Academy , Zhejiang University , Zhoushan 316021 , People's Republic of China.
PMID: 30209946 DOI: 10.1021/acs.jnatprod.8b00544
Abstract

Four new medermycin-type naphthoquinones, strepoxepinmycins A-D (1-4), and one known compound, medermycin (5), were identified from Streptomyces sp. XMA39. Their structures were elucidated by analysis of HRESIMS, 1D and 2D NMR spectroscopic data, and ECD calculations. Among these compounds, strepoxepinmycin A (1) represents a rare 5,10-oxepindione ring system typically formed by a Baeyer-Villiger oxidation, and strepoxepinmycin B (2) is an isolation artifact derived from 1. Bioactivity evaluations of these compounds showed that compounds 3 and 4 exhibited cytotoxicity against HCT-116 and PC-3 Cancer cell lines and 4 exhibited moderate inhibition of ROCK 2 protein kinase. In addition, all of the new compounds showed Antibacterial activity against Escherichia coli and methicillin-resistant Staphylococcus aureus and Antifungal activity against Candida albicans.

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