Cruentaren, a New Antifungal Salicylate-Type Macrolide from Byssovorax cruenta (Myxobacteria) with Inhibitory Effect on Mitochondrial ATPase Activity

The Journal of Antibiotics
2006.0

Abstract

The novel macrolide cruentaren A was produced at levels up to 3.2 mg/liter by cultures of the myxobacterium Byssovorax cruenta. The new compound strongly inhibited the growth of yeasts and filamentous fungi and showed high cytotoxicity against L929 mouse fibroblast cells. A minor co-metabolite of cruentaren A, named cruentaren B, and identified as a six-membered lactone isomer of cruentaren A, showed only marginal cytotoxicity and no antifungal activity. Cruentaren A inhibited F0F1 mitochondrial ATP-hydrolysis in submitochondrial particles of yeasts and beef heart.

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