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The RSC chromatin remodelling enzyme has a unique role in directing the accurate positioning of nucleosomes
Author(s) -
Wippo Christian J,
Israel Lars,
Watanabe Shinya,
Hochheimer Andreas,
Peterson Craig L,
Korber Philipp
Publication year - 2011
Publication title -
the embo journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.484
H-Index - 392
eISSN - 1460-2075
pISSN - 0261-4189
DOI - 10.1038/emboj.2011.43
Subject(s) - nucleosome , chromatin structure remodeling (rsc) complex , biology , chromatin , chromatin remodeling , microbiology and biotechnology , swi/snf , genetics , dna , saccharomyces cerevisiae , histone , yeast
Nucleosomes impede access to DNA. Therefore, nucleosome positioning is fundamental to genome regulation. Nevertheless, the molecular nucleosome positioning mechanisms are poorly understood. This is partly because in vitro reconstitution of in vivo ‐like nucleosome positions from purified components is mostly lacking, barring biochemical studies. Using a yeast extract in vitro reconstitution system that generates in vivo ‐like nucleosome patterns at S. cerevisiae loci, we find that the RSC chromatin remodelling enzyme is necessary for nucleosome positioning. This was previously suggested by genome‐wide in vivo studies and is confirmed here in vivo for individual loci. Beyond the limitations of conditional mutants, we show biochemically that RSC functions directly, can be sufficient, but mostly relies on other factors to properly position nucleosomes. Strikingly, RSC could not be replaced by either the closely related SWI/SNF or the Isw2 remodelling enzyme. Thus, we pinpoint that nucleosome positioning specifically depends on the unique properties of the RSC complex.