Venturicidin A is a macrolide antibiotic isolated from strains of Streptomyces. It is active against fungi in the genus Venturia which cause apple scab, as well as other fungi, but not against higher plants. Venturicidin A is also cytotoxic against trypanosomes (IC50 = 120-540 ng/ml) while being more than 25,000 times less effective against mammalian cells. It inhibits bacterial and mitochondrial ATP synthases.
