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Evaluation Study
Journal Article
Research Support, N.I.H., Extramural
General method for rapid purification of native chromatin fragments.
Journal of Biological Chemistry 2018 August 4
Biochemical, proteomic, and epigenetic studies of chromatin rely on the ability to efficiently isolate native nucleosomes in high yield and purity. However, isolation of native chromatin suitable for many downstream experiments remains a challenging task. This is especially true for the budding yeast Saccharomyces cerevisiae , which continues to serve as an important model organism for the study of chromatin structure and function. Here, we developed a time- and cost-efficient universal protocol for isolation of native chromatin fragments from yeast, insect, and mammalian cells. The resulting protocol preserves histone posttranslational modification in the native chromatin state and is applicable for both parallel multisample spin-column purification and large-scale isolation. This protocol is based on the efficient and stable purification of polynucleosomes and features a combination of optimized cell lysis and purification conditions, three options for chromatin fragmentation, and a novel ion-exchange chromatographic purification strategy. The procedure will aid chromatin researchers interested in isolating native chromatin material for biochemical studies and serve as a mild, acid- and detergent-free sample preparation method for MS analysis.
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