Abstract
SummaryPurified chromatin rings, excised from the PHO5 locus of yeast in transcriptionally repressed and activated states, were remodeled with RSC and ATP. Nucleosomes were translocated, and those originating on the promoter of repressed rings were removed, whereas those originating on the open reading frame (ORF) were retained. Treatment of the repressed rings with histone deacetylase diminished the removal of promoter nucleosomes. These findings point to a principle of promoter chromatin remodeling for transcription, that promoter-specificity resides primarily in the nucleosomes, rather than in the remodeling complex that acts upon them.
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