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S-adenosylmethionine synthases specify distinct H3K3me3 populations and gene expression patterns during heat stress [RNA-seq: sams-4 RNAi, Heat shock]

ABSTRACT: We find that two SAM synthases in C. elegans, SAMS-1 and SAMS-3/4, contribute differently to modification of H3K4me3, gene expression and survival in the heat stress response. Our data showing differential SAM provisioning to distinct groups of methylated targets based on SAM synthase source suggests that determining how methyl donors are provided will broaden insight into 1CC functions in aging and stress.

ORGANISM(S): Caenorhabditis elegans

PROVIDER: GSE223596 | GEO | 2023/02/13

REPOSITORIES: GEO

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S-adenosylmethionine synthases specify distinct H3K3me3 populations and gene expression patterns during heat stress [CUT&Tag]

Project description:We find that two SAM synthases in C. elegans, SAMS-1 and SAMS-3/4, contribute differently to modification of H3K4me3, gene expression and survival in the heat stress response. Our data showing differential SAM provisioning to distinct groups of methylated targets based on SAM synthase source suggests that determining how methyl donors are provided will broaden insight into 1CC functions in aging and stress.

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S-adenosylmethionine synthases specify distinct H3K3me3 populations and gene expression patterns during heat stress

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S-adenosylmethionine synthases specify distinct H3K3me3 populations and gene expression patterns during heat stress [RNA-seq: sams RNAi, 20C]

Project description:S-adenosylmethionine synthases specify distinct H3K3me3 populations and gene expression patterns during heat stress [RNA-seq: sams RNAi, 20C]

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S-adenosylmethionine synthases specify distinct H3K3me3 populations and gene expression patterns during heat stress [RNA-seq: sams-4 RNAi, Heat shock]

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S-adenosylmethionine synthases specify distinct H3K3me3 populations and gene expression patterns during heat stress

Project description:S-adenosylmethionine synthases specify distinct H3K3me3 populations and gene expression patterns during heat stress

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S-adenosylmethionine synthases specify distinct H3K3me3 populations and gene expression patterns during heat stress [CUT&Tag]

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S-adenosylmethionine synthases specify distinct H3K4me3 populations and gene expression patterns during heat stress.

Project description: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 (1 CC). Alterations in 1 CC 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 1 CC function to phenotypes in aging and stress.

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