A SWI/SNF- and INO80-dependent nucleosome movement at the INO1 promoter.
Transcriptional activation in yeast INO1 chromatin was studied using the indirect end-labeling technique. INO1 chromatin is organized into an ordered, overlapping nucleosomal array under repressing conditions. Nucleosome positions were only disrupted at the promoter region under inducing conditions in the presence of SWI/SNF and INO80. Mutants lacking either remodeler demonstrated identical positioning patterns as the wild type under repressing conditions. This indicates that these two remodelers are responsible and essential for local nucleosomal mobilization at the INO1 promoter. The area of local nucleosome movement is consistent with the previously identified region of histone deacetylation activity. In light of these findings, we suggest that nucleosomes subject to local mobilization are also targets for local histone modifications.
Department of Biology, College of Staten Island, City University of New York, Staten Island, NY 10314, USA.
Jason
J
Ford
Oluwafemi
O
Odeyale
Antonious
A
Eskandar
Nafila
N
Kouba
Chang-Hui
CH
Shen
D000251:Adenosine Triphosphatases; D042002:Chromatin Assembly and Disassembly; D004268:DNA-Binding Proteins / Q000235:genetics / Q000502:physiology*; D017353:Gene Deletion; D007296:Myo-Inositol-1-Phosphate Synthase / Q000235:genetics*; D009707:Nucleosomes / Q000737:chemistry*; D011401:Promoter Regions, Genetic; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics* / Q000502:physiology*; D014157:Transcription Factors / Q000235:genetics / Q000502:physiology*; D015533:Transcriptional Activation
D004268:DNA-Binding Proteins; C483404:INO80 complex, S cerevisiae; D009707:Nucleosomes; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors; D000251:Adenosine Triphosphatases; C499333:SNF2 protein, S cerevisiae; C519641:INO1 protein, S cerevisiae; D007296:Myo-Inositol-1-Phosphate Synthase