Bioactive Streptoglutarimides A-J from the Marine-Derived Streptomyces sp. ZZ741

  • J Nat Prod. 2019 Oct 25;82(10):2800-2808. doi: 10.1021/acs.jnatprod.9b00481.
Di Zhang  1 ,  Wenwen Yi  1 ,  Hengju Ge  1 ,  Zhizhen Zhang  1 ,  Bin Wu  1
Affiliations
  • 1. Ocean College, Zhoushan Campus , Zhejiang University , Zhoushan 316021 , People's Republic of China.
PMID: 31584271 DOI: 10.1021/acs.jnatprod.9b00481
Abstract

The new streptoglutarimides A-J (1-10) and the known streptovitacin A (11) were isolated from a marine-derived actinomycete, Streptomyces sp. ZZ741. Structures of the isolated compounds were elucidated based on their HRESIMS data, extensive NMR spectroscopic analyses, ECD calculations, Mosher's method, and a single-crystal X-ray diffraction experiment. Streptoglutarimide H (8) and streptovitacin A (11) showed potent antiproliferative activity against human glioma U87MG and U251 cells with IC50 values of 1.5-3.8 μM for 8 and 0.05-0.22 μM for 11. All isolated compounds exhibited antimicrobial activity with MIC values of 9-11 μg/mL against methicillin-resistant Staphylococcus aureus, 8-12 μg/mL against Escherichia coli, and 8-20 μg/mL against Candida albicans.