Abstract
Genomic regions associated with regulatory proteins are known to be highly sensitive to DNase I digestion and are termed DNase I hypersensitive sites (DHSs). DHSs can be identified by DNase I digestion followed by high-throughput DNA sequencing (DNase-seq). DNase-seq has become a powerful technique for genome-wide mapping of chromatin accessibility in eukaryotes with a sequenced genome. We have developed a DNase-seq procedure in plants. This procedure was adapted from the protocol originally developed for mammalian cell lines. It includes plant nuclei isolation, digestion of purified nuclei with DNase I, recovery of DNase-trimmed DNA fragments, DNase-seq library development, Illumina sequencing and data analysis. We also introduce a barcoding system for library preparation. We have conducted DNase-seq in both Arabidopsis thaliana and rice, and developed genome-wide open chromatin maps in both species. These DHS datasets have been used to detect footprints from regulatory protein binding and to reveal genome-wide nucleosome positioning patterns.
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This work was supported by grant DBI-0923640 from the National Science Foundation.
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Zhang, W., Jiang, J. (2015). Genome-Wide Mapping of DNase I Hypersensitive Sites in Plants. In: Alonso, J., Stepanova, A. (eds) Plant Functional Genomics. Methods in Molecular Biology, vol 1284. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-2444-8_4
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DOI: https://doi.org/10.1007/978-1-4939-2444-8_4
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