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- W4367369209 abstract "Abstract Histone modifications are one of the many key mechanisms that regulate gene expression. Ash1 is a histone H3K36 methyltransferase and is involved in gene activation. Ash1 forms a large complex with Mrg15 and Caf1/p55/Nurf55/RbAp48 (AMC complex). The Ash1 subunit alone exhibits very low activity due to the autoinhibition, and the binding of Mrg15 releases the autoinhibition. Caf1 is a scaffolding protein commonly found in several chromatin modifying complexes and has two histone binding pockets: one for H3 and the other for H4. Caf1 has the ability to sense unmodified histone H3K4 residues using the H3 binding pocket. However, the role of Caf1 in the AMC complex has not been investigated. Here, we dissected the interaction among the AMC complex subunits, revealing that Caf1 uses the histone H4 binding pocket to interact with Ash1 near the histone binding module cluster. Furthermore, we showed that H3K4 methylation inhibits AMC HMTase activity via Caf1 sensing unmodified histone H3K4 to regulate the activity in an internucleosomal manner, suggesting that crosstalk between H3K4 and H3K36 methylation. Our work revealed a delicate mechanism by which the AMC histone H3K36 methyltransferase complex is regulated." @default.
- W4367369209 created "2023-04-30" @default.
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- W4367369209 date "2023-04-29" @default.
- W4367369209 modified "2023-10-18" @default.
- W4367369209 title "Caf1 regulates the histone methyltransferase activity of Ash1 by sensing unmodified histone H3" @default.
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- W4367369209 doi "https://doi.org/10.1186/s13072-023-00487-6" @default.
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