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Epipyrone A, a Broad-Spectrum Antifungal Compound Produced by Epicoccum nigrum ICMP 19927
Alex J Lee1, Melissa M Cadelis2,3, Sang H Kim1
1School of Biological Sciences, University of Auckland, 3A Symonds Street, 1010 Auckland, New Zealand.
Abstract:
We have isolated a filamentous fungus that actively secretes a pigmented exudate when growing on agar plates. The fungus was identified as being a strain of Epicoccum nigrum. The fungal exudate presented strong antifungal activity against both yeasts and filamentous fungi, and inhibited the germination of fungal spores. The chemical characterization of the exudate showed that the pigmented molecule presenting antifungal activity is the disalt of epipyrone A-a water-soluble polyene metabolite with a molecular mass of 612.29 and maximal UV-Vis absorbance at 428 nm. This antifungal compound showed excellent stability to different temperatures and neutral to alkaline pH.
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