Benastatin K (1), a new chlorinated benastatin derivative, was isolated from the culture broth of the actinomycete Streptomyces sp. HGTA384. The structure of 1 was determined on the basis of spectroscopic analysis, including 1D and 2D NMR, as well as HRESI-MS, UV and IR, and comparison with data reported in the literature. Compound 1 and benastatins A and B exhibited inhibitory activity against Micrococcus luteus (MIC 7.8, 31.3, and 3.9 μM, respectively), and IgE-mediated β-hexosaminidase release in RBL-2H3 cells with IC 50 values of 42, 79, and 19 μM, respectively.
Keyphrases
- induced apoptosis
- mass spectrometry
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- molecular docking
- ms ms
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- endoplasmic reticulum stress
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- oxidative stress
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