Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

The one-carbon metabolism enzyme Ahcy is a redox sensor that modulates gene expression to protect against light stress-induced retinal degeneration

ABSTRACT: One-carbon metabolism influences the response to oxidative stress through antioxidant biosynthesis and the transcriptional status of the cell via epigenetic mechanisms. One-carbon metabolism is responsible for the production of the universal methyl donor, S-adenosylmethionine (SAM), which generates the potent methyltransferase inhibitor, S-adenosylhomocysteine (SAH). The essential metabolic enzyme, S-adenosylhomocysteinase (AHCY), functions within one-carbon metabolism and is the sole enzyme to catabolize the metabolite S-adenosylhomocysteine (SAH). Under oxidative stress conditions, AHCY becomes oxidized at a critical residue for its activity correlating with increased SAH abundance in the Drosophila head. Here, we profiled the photoreceptor transcriptome at a single time point after 3-hour blue light exposure relative to untreated controls in the Drosophila eye. We used RNAi expressed in all cells of the eye under longGMR-Gal4 to knockdown Ahcy and examined photoreceptor cells enriched using nuclei-immunoenrichment. As a control, we expressed non-specific RNAi against mCherry.

ORGANISM(S): Drosophila melanogaster

PROVIDER: GSE294368 | GEO | 2025/09/04

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Downregulation of Ahcy with and without blue light exposure significantly alters global gene expression in the Drosophila eye

Project description:One-carbon metabolism influences the response to oxidative stress through antioxidant biosynthesis and the transcriptional status of the cell via epigenetic mechanisms. One-carbon metabolism is responsible for the production of the universal methyl donor, S-adenosylmethionine (SAM), which generates the potent methyltransferase inhibitor, S-adenosylhomocysteine (SAH). The essential metabolic enzyme, S-adenosylhomocysteinase (AHCY), functions within one-carbon metabolism and is the sole enzyme to catabolize the metabolite S-adenosylhomocysteine (SAH). Under oxidative stress conditions, AHCY becomes oxidized at a critical residue for its activity correlating with increased SAH abundance in the Drosophila head. Here, we profiled the photoreceptor transcriptome at a single time point after 3-hour blue light exposure relative to untreated controls in the Drosophila eye. We used RNAi expressed in all cells of the eye under longGMR-Gal4 to knockdown Ahcy and examined photoreceptor cells enriched using nuclei-immunoenrichment. As a control, we expressed non-specific RNAi against mCherry.

2025-09-04 | GSE289458 | GEO

The effect of Y145C mutation in AHCY-1 on the total proteome of young adults C.elegans

Project description:Supplementation with S-adenosylhomocysteine (SAH) extends the lifespan of model organisms. To explore the impact of SAH on aging, we generated a Caenorhabditis elegans model with increased SAH levels through pathogenic mutation in the S-adenosylhomocysteine hydrolase (AHCY-1), which impairs SAH hydrolysis to adenosine and homocysteine. This submission contains results of the quantitative (TMT) measurements of the proteins in whole worm extracts originated from AHCY-1 Y143C mutant (equivalent to the human pathogenic variant) and control worms.

2023-09-29 | PXD041645 | Pride

Regulation of the circadian clock by the metabolic enzyme AHCY

Project description:Mammalian circadian rhythms are based on coupled transcriptional-translational feedback loops driven by the transcription factors CLOCK and BMAL1. Chromatin remodeling mechanisms are essential for the proper timing and extent of circadian gene expression. We report that the S-adenosylhomocysteine (SAH) hydrolysing enzyme AHCY binds to CLOCK-BMAL1 at chromatin and drives circadian transcription by promoting cyclic H3K4 trimethylation and recruitment of BMAL1 to chromatin.

2020-02-01 | GSE125720 | GEO

Regulation of the circadian clock by the metabolic enzyme AHCY

2021-01-11 | GSE126851 | GEO

Next Generation Sequencing Facilitates Quantitative Analysis of WT AHCY E14.1 cell and T136A AHCY E14.1 cell

Project description:Purpose: To test the effect of AHCY O-GlcNAcylation on E14.1cell pluripotency and The goals of this study are to compare gene expression profiles of the WT AHCY rescue cells and the T136A AHCY rescue cells. Method:Total RNA was Trizol-extracted and purified from total RNA using poly-T oligo-attached magnetic beads. Fragmentation was carried out using divalent cations under elevated temperature in NEB. cDNA was synthesized using random hexamer primer and RNase H. The library fragments were purified with QiaQuick PCR kits and elution with EB buffer, then terminal repair A-tailing and adapter added were implemented. The clustering of the index-coded samples was performed on a cBot cluster generation system using HiSeq PE Cluster Kit v4-cBot-HS (Illumina) according to the manufacturer’s instructions. After cluster generation, the libraries were sequenced on an Illumina platform and 150 bp paired-end reads were generated. Results:Significant alterations in gene expression levels were observed, with 1351 genes upregulated and 979 genes downregulated in the T136A AHCY rescue cells

2020-03-01 | GSE143756 | GEO

Analysis of the senescence transcriptome after knockdown of AHCY

Project description:IMR90 ER:RAS cells were infected with 2 different lentiviral pGIPZ shRNAs against AHCY or with an empty vector (EV). We treated IMR90 ER:RAS cells with 4OHT to induce RAS activation or with vehicle (DMSO) as a non-senescent control. RNA was collected 6 days after the start of the experiment once the senescence program has been fully implemented. Our previous experiments showed that knockdown of AHCY prevents senescence. By performing RNAseq, we have unveiled that AHCY knockdown prevents upregulation of a set of genes essential for the onset of senescence and its associated secretory phenotype.

2022-07-19 | GSE155904 | GEO

Chromatin capture defines AHCY as regulator of pluripotent stem cells proliferation

Project description:Profiling of the proteome bound to the chromatin in a simple, direct and reliable manner might result key to uncover the role of unpredicted chromatin factors in physiology and disease. We have developed a biochemical strategy named iChrock to capture the chromatin in a single purification step that provides a global view of the cellular chromatome and enables the identification of chromatin-bound proteins de novo. Integrating iChrock with genomic and functional data, we have unveiled the unexpected chromatin function of Adenosylhomocysteinase (AHCY), a major one-carbon pathway metabolic enzyme, in gene activation. Our study reveals a new regulatory axis between the metabolic state of pluripotent cells, ribosomal protein production and cell division during early phase of embryo development, by favoring the metabolic flux of methylation reactions in a local milieu.

2019-03-19 | GSE116799 | GEO

The one-carbon metabolism enzyme Ahcy is a redox sensor that modulates gene expression to protect against light stress-induced retinal degeneration

Project description:The one-carbon metabolism enzyme Ahcy is a redox sensor that modulates gene expression to protect against light stress-induced retinal degeneration

| PRJNA1249269 | ENA

Chromatin capture links the metabolic enzyme AHCY to stem cell proliferation

Project description:Profiling the chromatin-bound proteome (chromatome) in a simple, direct, and reliable manner might be key to uncovering the role of yet uncharacterized chromatin factors in physiology and disease. Here, we have design an experimental strategy to survey the chromatome of proliferating cells by using the DNA-mediated chromatin pull-down technology (Dm-ChP). Our approach provides a global view of cellular chromatome in normal physiological conditions and enables the identification of chromatin-bound proteins de novo. Integrating Dm-ChP with genomic and functional data, we have discovered an unexpected chromatin function for adenosylhomocysteinase (AHCY), a major one-carbon pathway metabolic enzyme, in gene activation. Our study reveals a new regulatory axis between the metabolic state of pluripotent cells, ribosomal protein production, and cell division during early phase of embryo development, in which the metabolic flux of methylation reactions is favored in a local milieu

2019-03-13 | PXD011670 | Pride

S-adenosylmethionine (SAM) changes DNA methylation patterns in prostate cancer cells

Project description:Genome-wide DNA methylation profiling of human PC3 invasive prostate cancer cell line treated with vehicle control (SAH, S-adenosylhomocysteine) and with SAM (S-adenosylmethionine) as well as of untreated human LNCaP non-invasive prostate cancer cell line. The Illumina Infinium 450k Human DNA Methylation BeadChip v1.2 was used to obtain DNA methylation profiles across approximately 450,000 CpGs in human cell lines exposed to described treatments. Samples included biological triplicate of PC3 control (SAH treated), biological triplicate of PC3 treated with SAM, and biological duplicate of LNCaP untreated. Bisulfite-converted DNA from the 8 samples were hybridised to the Illumina Infinium 450k Human Methylation BeadChip v1.2.

2015-03-01 | E-GEOD-62053 | biostudies-arrayexpress

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data