||Complementary whole-genome technologies reveal the cellular response to proteasome inhibition by PS-341.
||James A Fleming, Eric S Lightcap, Seth Sadis, Vala Thoroddsen, Christine E Bulawa, Ronald K Blackman
||Although the biochemical targets of most drugs are known, the biological consequences of their actions are typically less well understood. In this study, we have used two whole-genome technologies in Saccharomyces cerevisiae to determine the cellular impact of the proteasome inhibitor PS-341. By combining population genomics, the screening of a comprehensive panel of bar-coded mutant strains, and transcript profiling, we have identified the genes and pathways most affected by proteasome inhibition. Many of these function in regulated protein degradation or a subset of mitotic activities. In addition, we identified Rpn4p as the transcription factor most responsible for the cell's ability to compensate for proteasome inhibition. Used together, these complementary technologies provide a general and powerful means to elucidate the cellular ramifications of drug treatment.
||Proc. Natl. Acad. Sci. U.S.A. 2002; 99:1461-6
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