Ulanovskaya OA~Kozmin SA, 2008

Pubmed ID 18516048
Title Synthesis enables identification of the cellular target of leucascandrolide A and neopeltolide.
Authors Olesya A Ulanovskaya, Jelena Janjic, Masato Suzuki, Simran S Sabharwal, Paul T Schumacker, Stephen J Kron, Sergey A Kozmin
Abstract Leucascandrolide A and neopeltolide are structurally homologous marine natural products that elicit potent antiproliferative profiles in mammalian cells and yeast. The scarcity of naturally available material has been a significant barrier to their biochemical and pharmacological evaluation. We developed practical synthetic access to this class of natural products that enabled the determination of their mechanism of action. We demonstrated effective cellular growth inhibition in yeast, which was substantially enhanced by substituting glucose with galactose or glycerol. These results, along with genetic analysis of determinants of drug sensitivity, suggested that leucascandrolide A and neopeltolide may inhibit mitochondrial ATP synthesis. Evaluation of the activity of the four mitochondrial electron transport chain complexes in yeast and mammalian cells revealed cytochrome bc(1) complex as the principal cellular target. This result provided the molecular basis for the potent antiproliferative activity of this class of marine macrolides, thus identifying them as new biochemical tools for investigation of eukaryotic energy metabolism.
Citation Nat. Chem. Biol. 2008; 4:418-24

Datasets

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Paper Phenotype Condition Medium Collection Tested mutants Data Details
Ulanovskaya OA~Kozmin SA, 2008 growth (culture turbidity) Leucascandrolide A [5-25 nM] hap a ~4,900 Discrete

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