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Exploring the mode-of-action of bioactive compounds by chemical-genetic profiling in yeast.

by: AB Parsons, A Lopez, IE Givoni, DE Williams, CA Gray, J Porter, G Chua, R Sopko, RL Brost, CH Ho, J Wang, T Ketela, C Brenner, JA Brill, GE Fernandez, TC Lorenz, GS Payne, S Ishihara, Y Ohya, B Andrews, TR Hughes, BJ Frey, TR Graham, RJ Andersen, C Boone
Cell, Vol. 126, No. 3. (11 August 2006), pp. 611-625.


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Discovering target and off-target effects of specific compounds is critical to drug discovery and development. We generated a compendium of "chemical-genetic interaction" profiles by testing the collection of viable yeast haploid deletion mutants for hypersensitivity to 82 compounds and natural product extracts. To cluster compounds with a similar mode-of-action and to reveal insights into the cellular pathways and proteins affected, we applied both a hierarchical clustering and a factorgram method, which allows a gene or compound to be associated with more than one group. In particular, tamoxifen, a breast cancer therapeutic, was found to disrupt calcium homeostasis and phosphatidylserine (PS) was recognized as a target for papuamide B, a cytotoxic lipopeptide with anti-HIV activity. Further, the profile of crude extracts resembled that of its constituent purified natural product, enabling detailed classification of extract activity prior to purification. This compendium should serve as a valuable key for interpreting cellular effects of novel compounds with similar activities.


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