Genome information processing by the INO80 chromatin remodeler positions nucleosomes [preprint]
UMass Chan AffiliationsDepartment of Biochemistry and Molecular Pharmacology
genome information processing
Amino Acids, Peptides, and Proteins
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AbstractThe fundamental molecular determinants by which ATP-dependent chromatin remodelers organize nucleosomes across eukaryotic genomes remain largely elusive. Here, chromatin reconstitutions on physiological, whole-genome templates reveal how remodelers read and translate genomic information into nucleosome positions. Using the yeast genome and the multi-subunit INO80 remodeler as a paradigm, we identify DNA shape/mechanics encoded signature motifs as sufficient for nucleosome positioning and distinct from known DNA sequence preferences of histones. INO80 processes such information through an allosteric interplay between its core- and Arp8-modules that probes mechanical properties of nucleosomal and linker DNA. At promoters, INO80 integrates this readout of DNA shape/mechanics with a readout of co-evolved sequence motifs via interaction with general regulatory factors bound to these motifs. Our findings establish a molecular mechanism for robust and yet adjustable +1 nucleosome positioning and, more generally, remodelers as information processing hubs that enable active organization and allosteric regulation of the first level of chromatin.
bioRxiv 2020.11.03.366690; doi: https://doi.org/10.1101/2020.11.03.366690. Link to preprint on bioRxiv.
Permanent Link to this Itemhttp://hdl.handle.net/20.500.14038/29625
This article is a preprint. Preprints are preliminary reports of work that have not been certified by peer review.
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