title: SWI/SNF-dependent chromatin remodeling of RNR3 requires TAF(II)s and the general transcription machinery.
abstract: Gene expression requires the recruitment of chromatin remodeling activities and general transcription factors (GTFs) to promoters. Whereas the role of activators in recruiting chromatin remodeling activities has been clearly demonstrated, the contributions of the transcription machinery have not been firmly established. Here we demonstrate that the remodeling of the RNR3 promoter requires a number of GTFs, mediator and RNA polymerase II. We also show that remodeling is dependent upon the SWI/SNF complex, and that TFIID and RNA polymerase II are required for its recruitment to the promoter. In contrast, Gcn5p-dependent histone acetylation occurs independently of TFIID and RNA polymerase II function, and we provide evidence that acetylation increases the extent of nucleosome remodeling, but is not required for SWI/SNF recruitment. Thus, the general transcription machinery can contribute to nucleosome remodeling by mediating the association of SWI/SNF with promoters, thereby revealing a novel pathway for the recruitment of chromatin remodeling activities.
authors.affiliation: Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
authors.forename: Vishva Mitra
authors.initials: VM
authors.lastname: Sharma
authors.forename: Bing
authors.initials: B
authors.lastname: Li
authors.forename: Joseph C
authors.initials: JC
authors.lastname: Reese
mesh_terms: D000107:Acetylation; D002843:Chromatin / Q000235:genetics / Q000378:metabolism*; D018844:Cyclin-Dependent Kinases / Q000235:genetics / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D029721:Drosophila Proteins; D005656:Fungal Proteins / Q000235:genetics / Q000378:metabolism; D006657:Histones / Q000378:metabolism; D056892:Mediator Complex; D009154:Mutation; D009687:Nuclear Proteins / Q000235:genetics / Q000378:metabolism; D009707:Nucleosomes / Q000378:metabolism; D011401:Promoter Regions, Genetic; D011494:Protein Kinases / Q000235:genetics / Q000378:metabolism*; D012319:RNA Polymerase II / Q000235:genetics / Q000378:metabolism; D016601:RNA-Binding Proteins; D017412:Ribonucleoprotein, U1 Small Nuclear / Q000235:genetics / Q000378:metabolism*; D012264:Ribonucleotide Reductases / Q000235:genetics / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics / Q000378:metabolism*; D035381:TATA-Binding Protein Associated Factors / Q000235:genetics / Q000378:metabolism*; D035362:Transcription Factor TFIID / Q000235:genetics / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism; D014158:Transcription, Genetic; D015003:Yeasts / Q000235:genetics* / Q000378:metabolism
chemical_list: D002843:Chromatin; D004268:DNA-Binding Proteins; D029721:Drosophila Proteins; D005656:Fungal Proteins; D006657:Histones; D056892:Mediator Complex; C113769:NUT1 protein, S cerevisiae; D009687:Nuclear Proteins; D009707:Nucleosomes; D016601:RNA-Binding Proteins; D017412:Ribonucleoprotein, U1 Small Nuclear; C082148:SRB4 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins; C106785:TAF1 protein, S cerevisiae; C470012:TAF12 protein, human; D035381:TATA-Binding Protein Associated Factors; D035362:Transcription Factor TFIID; D014157:Transcription Factors; C089969:snf protein, Drosophila; D012264:Ribonucleotide Reductases; D011494:Protein Kinases; D018844:Cyclin-Dependent Kinases; C084210:Kin28 protein kinase, S cerevisiae; D012319:RNA Polymerase II