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- W4220784990 abstract "Abstract Methylation is a widely occurring modification that requires the methyl donor S-adenosylmethionine (SAM) and acts in regulation of gene expression and other processes. SAM is synthesized from methionine, which is imported or generated through the 1-carbon cycle (1CC). Alterations in 1CC function have clear effects on lifespan and stress responses, but the wide distribution of this modification has made identification of specific mechanistic links difficult. Exploiting a dynamic stress-induced transcription model, we find that two SAM synthases in Caenorhabditis elegans , SAMS-1 and SAMS-4, contribute differently to modification of H3K4me3, gene expression and survival. We find that sams-4 enhances H3K4me3 in heat shocked animals lacking sams-1 , however, sams-1 cannot compensate for sams-4 , which is required to survive heat stress. This suggests that the regulatory functions of SAM depend on its enzymatic source and that provisioning of SAM may be an important regulatory step linking 1CC function to phenotypes in aging and stress." @default.
- W4220784990 created "2022-04-03" @default.
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- W4220784990 date "2022-03-30" @default.
- W4220784990 modified "2023-10-14" @default.
- W4220784990 title "S-adenosylmethionine synthases specify distinct H3K4me3 populations and gene expression patterns during heat stress" @default.
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- W4220784990 doi "https://doi.org/10.1101/2022.03.30.486419" @default.
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