4.8 Article

scChIX-seq infers dynamic relationships between histone modifications in single cells

Journal

NATURE BIOTECHNOLOGY
Volume 41, Issue 6, Pages 813-+

Publisher

NATURE PORTFOLIO
DOI: 10.1038/s41587-022-01560-3

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scChIX-seq is a novel experimental and computational framework that allows mapping of multiple histone marks in single cells. This method enables systematic analysis of the interplay between histone modifications in individual cells.
Regulation of chromatin states involves the dynamic interplay between different histone modifications to control gene expression. Recent advances have enabled mapping of histone marks in single cells, but most methods are constrained to profile only one histone mark per cell. Here, we present an integrated experimental and computational framework, scChIX-seq (single-cell chromatin immunocleavage and unmixing sequencing), to map several histone marks in single cells. scChIX-seq multiplexes two histone marks together in single cells, then computationally deconvolves the signal using training data from respective histone mark profiles. This framework learns the cell-type-specific correlation structure between histone marks, and therefore does not require a priori assumptions of their genomic distributions. Using scChIX-seq, we demonstrate multimodal analysis of histone marks in single cells across a range of mark combinations. Modeling dynamics of in vitro macrophage differentiation enables integrated analysis of chromatin velocity. Overall, scChIX-seq unlocks systematic interrogation of the interplay between histone modifications in single cells.

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