Histone acetylation: Influence on transcription, nucleosome mobility and positioning, and linker histone-dependent transcriptional repression

Kiyoe Ura, Hitoshi Kurumizaka, Stefan Dimitrov, Geneviève Almouzni, Alan P. Wolffe

Research output: Contribution to journalArticle

191 Citations (Scopus)

Abstract

We demonstrate using a dinucleosome template that acetylation of the core histones enhances transcription by RNA polymerase III. This effect is not dependent on an increased mobility of the core histone octamer with respect to DNA sequence. When linker histone is subsequently bound, we find both a reduction in nucleosome mobility and a repression of transcription. These effects of linker histone binding are independent of core histone acetylation, indicating that core histone acetylation does not prevent linker histone binding and the concomitant transcriptional repression. These studies are complemented by the use of a Xenopus egg extract competent both for chromatin assembly on replicating DNA and for RNA polymerase III transcription. Incorporation of acetylated histones and lack of linker histones together facilitate transcription by > 10-fold in this system; however, they have little independent effect on transcription. Thus core histone acetylation significantly facilitates transcription, but this effect is inhibited by the assembly of linker histones into chromatin.

Original languageEnglish
Pages (from-to)2096-2107
Number of pages12
JournalEMBO Journal
Volume16
Issue number8
DOIs
Publication statusPublished - 1997 Apr 15
Externally publishedYes

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Keywords

  • Acetylation
  • Histones
  • Nucleosome mobility
  • Nucleosome positioning
  • Transcriptional regulation

ASJC Scopus subject areas

  • Genetics
  • Cell Biology

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