A new anthracycline derived pentacyclic metabolite, seragakinone A, was isolated from the mycelium of a fungus (K063), which was separated from an Okinawan marine red alga. Further investigation on extracts of the mycelium of the same fungus resulted in the isolation of two new peptides, dictyonamides A (1) and B (2). Dictyonamide A (1) showed inhibitory activity against cyclin-dependent kinase 4 with IC50 value of 16.5 μg/mL, while compound 2 did not show such activity (IC50 > 50 μg/mL)
peptides, marine-derived fungus, dictyonamides, Ceratodictyon spongiosum
NCBI PubMed ID: 11529752Publication DOI: 10.1021/jo0156767Journal NLM ID: 2985193RPublisher: Columbus, OH: American Chemical Society
Correspondence: jkobay@pharm.hokudai.ac.jp
Institutions: Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
Methods: 13C NMR, 1H NMR, NMR-2D, IR, FAB-MS, acid hydrolysis, GC, amino acid analysis, FAB-MS/MS, HPLC, UV, extraction, optical rotation measurement, cell growth, derivatization, evaporation, HR-FAB-MS