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Decoding the Protein Composition of Whole Nucleosomes with Nuc-MS

ABSTRACT: Current proteomic approaches disassemble and digest nucleosome particles, blurring readouts of the ‘histone code’. To preserve nucleosome-level information, we developed Nuc-MS, which displays the landscape of histone variants and their post-translational modifications (PTMs) in a single mass spectrum. Combined with immunoprecipitation, Nuc-MS quantified nucleosome co-occupancy of histone H3.3 with variant H2A.Z (sixfold over bulk) and the co-occurrence of oncogenic H3.3K27M with euchromatic marks (for example, a >15-fold enrichment of dimethylated H3K79me2). Nuc-MS is highly concordant with chromatin immunoprecipitation-sequencing (ChIP-seq) and offers a new readout of nucleosome-level biology. Chromatin immunoprecipitation DNA-sequencing (ChIP-seq) for histone variants H3.3, H2AZ as well as the histone modifications H3K79me2 and H4K16ac in HEK293T cells.

ORGANISM(S): Homo sapiens

PROVIDER: GSE216732 | GEO | 2022/11/03

REPOSITORIES: GEO

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