Upstream activation sequence-dependent alteration of chromatin structure and transcription activation of the yeast GAL1-GAL10 genes.
Conversion of the positioned nucleosome array characteristic of the repressed GAL1-GAL10 promoter region to the more accessible conformation of the induced state was found to depend on the upstream activation sequence, GAL4 protein, a positive regulator of transcription, and galactose, the inducing agent. The effect of the GAL4 protein-upstream activation sequence complex on the structure of adjacent chromatin required no other promoter sequences. Although sequences protected by histones in the repressed state became more accessible to micrococcal nuclease and (methidiumpropyl-EDTA)iron(II) cleavage following induction of transcription, DNA-protein particles containing these sequences retained the electrophoretic mobility of nucleosomes, indicating that the promoter region can be associated with nucleosomes under conditions of transcription activation.
Fedor
M J
MJ
Department of Cell Biology, Stanford University School of Medicine, California 94305.
Kornberg
R D
RD
D001483:Base Sequence; D001665:Binding Sites; D002843:Chromatin / Q000378:metabolism; D004271:DNA, Fungal / Q000235:genetics / Q000378:metabolism; D004268:DNA-Binding Proteins; D005656:Fungal Proteins / Q000235:genetics / Q000378:metabolism; D005786:Gene Expression Regulation; D005800:Genes, Fungal; D005809:Genes, Regulator; D006657:Histones / Q000378:metabolism; D009707:Nucleosomes / Q000378:metabolism; D011401:Promoter Regions, Genetic; D012045:Regulatory Sequences, Nucleic Acid; D012441:Saccharomyces cerevisiae / Q000235:genetics* / Q000378:metabolism; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors; D014158:Transcription, Genetic
D002843:Chromatin; D004271:DNA, Fungal; D004268:DNA-Binding Proteins; D005656:Fungal Proteins; C052130:GAL4 protein, S cerevisiae; D006657:Histones; D009707:Nucleosomes; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors