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Hsp90 inhibitors are currently tested in clinical trials as anticancer agents. We investigated whether inhibitor resistance may arise as a result of a point mutation in Hsp90. We used yeast cells that expressed human Hsp90β to select inhibitor-resistant mutants from the randomly mutagenized library. Single amino acid substitution, I123T, in a selected mutant was sufficient to confer inhibitor resistance...
Regulation of RNA polymerase II (pol II) transcription is a highly dynamic process requiring the coordinated interaction of an array of regulatory proteins. Central to this process is the TATA-binding protein (TBP), the key component of the multiprotein complex TFIID. Interaction of TBP with core promoters nucleates the assembly of the preinitiation complex and subsequent recruitment of pol II. Despite...
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