Skeletocutins M–Q: biologically active compounds from the fruiting bodies of the basidiomycete Skeletocutis sp. collected in Africa

Cheng, Tian;Chepkirui, Clara;Decock, Cony;Matasyoh, Josphat C;Stadler, Marc
(2019) Beilstein Journal of Organic Chemistry — Vol. 15, p. 2782-2789 (2019)

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  • Cheng, Tianorcid-logoDepartment of Microbial Drugs, Helmholtz Centre for Infection Research (HZI), German Centre for Infection Research (DZIF), Partner Site Hannover/Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany
    Author
  • Chepkirui, ClaraDepartment of Microbial Drugs, Helmholtz Centre for Infection Research (HZI), German Centre for Infection Research (DZIF), Partner Site Hannover/Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany
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  • Decock, Conyorcid-logoUCLouvain
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  • Matasyoh, Josphat CDepartment of Chemistry, Faculty of Science, Egerton University, P.O. Box 536, 20115, Egerton, Kenya
    Author
  • Stadler, Marcorcid-logoDepartment of Microbial Drugs, Helmholtz Centre for Infection Research (HZI), German Centre for Infection Research (DZIF), Partner Site Hannover/Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany
    Author
Abstract
During the course of screening for new metabolites from basidiomycetes, we isolated and characterized five previously unde- scribed secondary metabolites, skeletocutins M–Q (1–5), along with the known metabolite tyromycin A (6) from the fruiting bodies of the polypore Skeletocutis sp. The new compounds did not exhibit any antimicrobial, cytotoxic, or nematicidal activities. However, compound 3 moderately inhibited the biofilm formation of Staphylococcus aureus (S. aureus), while compounds 3 and 4 per formed moderately in the ʟ-leucine-7-amido-4-methylcoumarin (ʟ-Leu-AMC) inhibition assay. These compounds represent the first secondary metabolites reported to occur in the fruiting bodies by Skeletocutis. Interestingly, tyromycin A (6) was found to be the only common metabolite in fruiting bodies and mycelial cultures of the fungus, and none of the recently reported skeletocutins from the culture of the same strain were detected in the basidiomes.
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Citations

Cheng, T., Chepkirui, C., Decock, C., Matasyoh, J. C., & Stadler, M. (2019). Skeletocutins M–Q: biologically active compounds from the fruiting bodies of the basidiomycete Skeletocutis sp. collected in Africa. Beilstein Journal of Organic Chemistry, 15, 2782-2789. https://doi.org/10.3762/bjoc.15.270 (Original work published 2019)