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- W4319937679 abstract "Linker histone H1 proteins are amongst the most ubiquitous chromatin-binding proteins in eukaryotic cells. H1 binds to nucleosomes via interactions of the winged helix domain (WHD) with both the nucleosomal DNA at the dyad and the linker DNA that extends out from the nucleosome. The C-terminal domain (CTD) of H1 is a key domain for linker histone function, which includes regulating nucleosomal DNA wrapping, chromatin compaction, and transcription factor occupancy. Currently, dynamics of the DNA binding interactions between different H1 subtypes in the context of chromatin is poorly understood. Using an optical trap single molecule strategy combined with confocal microscopy, we investigated the DNA binding interactions between two different subtypes of human H1, H1.0 and H1.2, and nucleosomal DNA. We determined the impact of mechanical force on H1 binding interactions with linker and nucleosomal DNA, the role of the H1 CTD in regulating DNA binding interactions, and the regulation of linker histone H1 interactions with DNA by the linker histone chaperone protein Nap1. Our findings reveal the importance of the H1 CTD on how linker histones load onto DNA and find their nucleosome targets. These findings can help advance the biophysical and structural understanding of the mechanism behind how linker histone H1 targets nucleosomes to regulate chromatin compaction and transcription." @default.
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- W4319937679 date "2023-02-01" @default.
- W4319937679 modified "2023-09-25" @default.
- W4319937679 title "Single molecule evidence for linker histone H1 DNA sliding and nucleosomal bypassing regulated by the C-terminal disordered domain" @default.
- W4319937679 doi "https://doi.org/10.1016/j.bpj.2022.11.591" @default.
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