Functional analysis of histone H3.3 sub-variants in skeletal muscle regeneration, Komatsu Tetsuro, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Early-Career Scientists, Kyushu University, 01 Apr. 2018, 31 Mar. 2020, Histone variant H3.3 plays a critical role in regulating gene expression during development and differentiation. In this study, we analyzed the role of H3mm18, one of the “H3.3 sub-variants” expressed in skeletal muscle. Transcriptome analysis using mouse samples as well as culture cells revealed that H3mm18 regulates expression levels of myogenic genes upon skeletal muscle regeneration and/or differentiation. Furthermore, biochemical experiments suggested that H3mm18 itself is not stably incorporated into chromatin but regulates myogenic chromatin structure by competing with H3.3 in histone deposition., 18K16664