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Thermal proteome profilling of Ergothionine treated-cells reveals its binding to cystathionine-gamma-lyase (CSE)

ABSTRACT: Ergothioneine (ET), a dietary thione/thiol, is receiving growing attention for its possible benefits in healthy aging and metabolic resilience. Our study investigates ET's effects on healthspan in aged animals, revealing extension of lifespan and enhanced mobility in Caenorhabditis elegans, accompanied by improved stress resistance and reduced age-associated biomarkers. In aged rats, ET administration enhances exercise endurance, muscle mass, and vascularization, concomitant with higher NAD+ levels in muscle. Mechanistically, ET acts as an alternative substrate for cystathionine gamma lyase (CSE), stimulating H2S production, which increases protein persulfidation of more than 300 protein targets. Among these, protein persulfidation-driven activation of cytosolic glycerol-3-phosphate dehydrogenase (cGPDH) primarily contributes to the ET-induced NAD+ increase. ET’s effects are abolished in models lacking CSE and cGPDH, highlighting essential role of H2S signaling and protein persulfidation. These findings elucidate ET's multifaceted actions and provide insights into its therapeutic potential for combating age-related muscle decline and metabolic perturbations. To better understand the role of ET the cells, we used thermal proteome profilling of cells treated or not with ergothionine, allowing us to find new targets for the compound including CSE.

INSTRUMENT(S): Orbitrap Eclipse

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): Embryonic Fibroblast

SUBMITTER: Thibaut Vignane

LAB HEAD: Dr. Milos

PROVIDER: PXD051609 | Pride | 2025-01-20

REPOSITORIES: pride

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Project description:Hydrogen sulfide (H2S) is a signaling molecule that regulates essential plant processes, such as autophagy and responses to abiotic stresses. Although there is much information about the processes in which H2S is involved, the mechanism of action of H2S is still unclear. However, the posttranslational modification of cysteine residues, named persulfidation, is the main proposed mechanism. In this study, the role of H2S during drought that allows plant stress adaptation has been analyzed, with the focus on the underlying mechanism. H2S pretreatment before imposing drought on plants significantly improved phenotypic traits and decreased the content of biochemical and molecular drought stress markers. In addition, H2S regulated amino acid metabolism and repressed drought-induced degradation pathways, such as bulk autophagy and protein ubiquitination. The label-free quantitative proteomic analysis of plants growing under control and drought stress identified 887 proteins significantly different persulfidated between both conditions. Bioinformatic analyses revealed that the biological processes most enriched containing the proteins more persulfidated in drought corresponded to cellular response to oxidative stress, and hydrogen peroxide catabolism. In addition, protein degradation, abiotic stress responses, anthocyanin-containing compound biosynthetic process, and flavonoid biosynthesis were highlighted. On the contrary, the most enriched biological process containing proteins with lower levels of persulfidation in drought corresponded to the biosynthetic processes of glucosinolates and chlorophyll. Therefore, our findings emphasize the role of H2S as a promoter of enhanced tolerance to drought, enabling plants to respond more rapidly and efficiently after exposure to drought. Furthermore, the proteomic analysis supports the main role of protein persulfidation as the molecular mechanism of H2S to alleviate ROS accumulation and balance redox homeostasis under drought stress.

			Action	DRS
	Eclipse_04675.mzML	Mzml
	Eclipse_04675.pepXML	Pepxml
	Eclipse_04675.raw	Raw
	Eclipse_04676.mzML	Mzml
	Eclipse_04676.pepXML	Pepxml

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Thermal proteome profilling of Ergothionine treated-cells reveals its binding to cystathionine-gamma-lyase (CSE)

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