Role of cell-type specific nucleosome positioning in inducible activation of mammalian promoters

Agata Oruba, Simona Saccani () and Dominic van Essen ()
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Agata Oruba: Max Planck Institute for Immunobiology & Epigenetics
Simona Saccani: Max Planck Institute for Immunobiology & Epigenetics
Dominic van Essen: Max Planck Institute for Immunobiology & Epigenetics

Nature Communications, 2020, vol. 11, issue 1, 1-18

Abstract: Abstract The organization of nucleosomes across functional genomic elements represents a critical layer of control. Here, we present a strategy for high-resolution nucleosome profiling at selected genomic features, and use this to analyse dynamic nucleosome positioning at inducible and cell-type-specific mammalian promoters. We find that nucleosome patterning at inducible promoters frequently resembles that at active promoters, even before stimulus-driven activation. Accordingly, the nucleosome profile at many inactive inducible promoters is sufficient to predict cell-type-specific responsiveness. Induction of gene expression is generally not associated with major changes to nucleosome patterning, and a subset of inducible promoters can be activated without stable nucleosome depletion from their transcription start sites. These promoters are generally dependent on remodelling enzymes for their inducible activation, and exhibit transient nucleosome depletion only at alleles undergoing transcription initiation. Together, these data reveal how the responsiveness of inducible promoters to activating stimuli is linked to cell-type-specific nucleosome patterning.

Date: 2020
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DOI: 10.1038/s41467-020-14950-5

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