Heptemerones A-G, seven novel diterpenoids from Coprinus heptemerus: Producing organism, fermentation, isolation and biological activities
Author
Summary, in English
Seven novel diterpenoids, named heptemerones A-G, were isolated from the broth of submerged cultures of Coprinus heptemerus, a basidiomycete which previously had not been known to produce secondary metabolites. The compounds were purified by solid phase extraction and silica gel chromatography followed by preparative HPLC. Among the biological activities the inhibition of fungal germination was the most potent, and depended highly on the composition of the assay medium. In water, inhibition occurred at 5 similar to 10 fold lower concentrations as compared to complex media. Heptemerone G was the most active compound with MICs starting at 1 mu g/ml. Four of the antifungal compounds exhibited plant protective activity in a leaf segment assay using Magnaporthe grisea as the pathogen. Growth of yeasts and bacteria was hardly affected. Cytotoxic activities were moderate and only heptemerone D was phytotoxic.
Department/s
Publishing year
2005
Language
English
Pages
390-396
Publication/Series
Journal of Antibiotics
Volume
58
Issue
6
Document type
Journal article
Publisher
Japan Antibiotics Research Association
Topic
- Organic Chemistry
Status
Published
ISBN/ISSN/Other
- ISSN: 0021-8820