Fungal Lethality, Binding, and Cytotoxicity of Syringomycin-E

Syringomycin-E (SE) was significantly lethal to Aspergillus and Fusarium species at between 1.9 and 7.8 μg/ml. SE complexed with the following fungal wall constituents (in order of binding): β-1,3-glucan > chitin > mannan > ergosterol = cholesterol. Cytotoxicity in HeLa cells was proportional to the SE concentration, while the amount required for cytotoxicity was 3 to 20 times that needed to kill 95% of the fungi tested.