ArticleNature genetics2026
Identifying critical lysines in mammalian histone H3 with high-throughput CRISPR prime editing.
Article in Nature genetics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Histone post-translational modifications are fundamental to genome regulation, yet dissecting the functions of individual histone marks in mammals remains challenging due to the presence of multiple histone gene copies. Here we develop a high-throughput clustered regularly interspaced short palindromic repeats (CRISPR) prime editing platform enabling precise, reversible and combinatorial mutagenesis of canonical and noncanonical histone H3 genes within their native genomic context. Using systematic lysine-to-arginine substitutions benchmarked against synonymous controls, we identify key residues, including H3K4, H3K9, H3K14, H3K18 and H3K79, whose mutation compromises fitness in mouse embryonic stem cells. We further show that H3K56, linked to genome stability in yeast and Drosophila, has a conserved role in mammalian cells. Through analysis of selected double mutants, we uncover functional crosstalk across residues, with combinations such as H3K27R + H3K36R impairing stem cell self-renewal and altering transcription. Altogether, this study establishes a functional map of histone H3 lysines in mammals and provides a broadly applicable platform for systematic dissection of chromatin regulation.
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