SWI/SNF-dependent chromatin remodeling of RNR3 requires TAFIIs and the general transcription machinery

Vishva Mitra Sharma, Bing Li, Joseph C. Reese

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60 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)502-515
Number of pages14
JournalGenes and Development
Volume17
Issue number4
DOIs
Publication statusPublished - Feb 15 2003

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All Science Journal Classification (ASJC) codes

  • Genetics
  • Developmental Biology

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