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- W1971249969 abstract "Histone post-translational modifications have been implicated in a variety of biological processes such as gene expression, DNA replication, and chromatin assembly. The modifications include methylation, acetylation, phosphorylation, ubiquitination, glycosylation, and ADP-ribosylation. For several years, we have been investigating the role of histone H1 phosphorylation in transcription using the hormone inducible mouse mammary tumor virus (MMTV) promoter. When mouse cells were exposed to prolonged treatment with dexamethasone, a significant decrease in the level of histone H1 phosphorylation was observed. Traditionally, Western analyses with anti-histone H1 and phospho-specific H1 antibodies were performed to observe changes in phosphorylation levels of the bulk H1 histones. More recently, we have applied electrospray ionization mass spectrometry to the analysis of histone H1 isoforms. Utilizing this approach, we have investigated the phosphorylation state of the specific H1 isoforms before and after prolonged treatment with dexamethasone. Specifically, we could determine that the relative phosphorylation levels of the histone H1.3, H1.4, and H1.5 isoforms decrease after prolonged hormone exposure. Recent advancements in mass spectrometry have proven invaluable toward the analysis of post-translational modifications on proteins. The continued developments in the area of mass spectrometry should provide new insights into not only the function of proteins but also into the basic regulatory mechanisms that control cellular functions." @default.
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- W1971249969 date "2004-05-01" @default.
- W1971249969 modified "2023-09-25" @default.
- W1971249969 title "Understanding global changes in histone H1 phosphorylation using mass spectrometry" @default.
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- W1971249969 doi "https://doi.org/10.1016/j.ymeth.2003.10.020" @default.
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