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The C. elegans ortholog of human selenium binding protein 1 is a pro-aging factor protecting against selenite toxicity

ABSTRACT: The C. elegans ortholog of human selenium binding protein 1 is a pro-aging factor protecting against selenite toxicity

PROVIDER: PRJNA554266 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9674460.fastq.gz	Fastqsanger.gz
	SRR9674455.fastq.gz	Fastqsanger.gz
	SRR9674456.fastq.gz	Fastqsanger.gz
	SRR9674457.fastq.gz	Fastqsanger.gz
	SRR9674458.fastq.gz	Fastqsanger.gz

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The C. elegans ortholog of human selenium binding protein 1 is a pro-aging factor protecting against selenite toxicity

Project description:Y37A1B.5, a SELENBP1 ortholog in C. elegans modulates lifespan and stress resistance. Hence transcriptome profiling (RNA-seq) after depletion of Y37A1B.5 via RNAi was performed, aiming to identify targets that would explain these effects.

2019-09-16 | GSE134196 | GEO

Transcriptomic profiling of S. cerevisiae wild type and aft2 mutant in response to exposure to selenite

2015-12-31 | GSE70835 | GEO

RNAseq of the effect of selenite and coated selenium nanoparticles against spheroids of SKOV-3 and OVCAR-3 ovarian cancer cell lines

Project description:Analysis of transcriptome changes in SKOV-3 and OVCAR-3 spheroids following selenite or coated selenium nanoparticles treatment at sublethal doses for 24 hrs

2023-02-24 | GSE149397 | GEO

Transcriptome of Pseudomonas putida KT2440 in response to selenite

Project description:The bacterium Pseudomonas putida KT2440 has the ability to reduce selenite forming nanoparticles of elemental selenium. This is the transcriptome of the organism when cultured in the presence of selenite.

2022-10-01 | GSE214391 | GEO

A Caenorhabditis elegans ortholog of human selenium-binding protein 1 is a pro-aging factor protecting against selenite toxicity.

Project description:Human selenium-binding protein 1 (SELENBP1) was originally identified as a protein binding selenium, most likely as selenite. SELENBP1 is associated with cellular redox and thiol homeostasis in several respects, including its established role as a methanethiol oxidase that is involved in degradation of methanethiol, a methionine catabolite, generating hydrogen sulfide (H2S) and hydrogen peroxide (H2O2). As both H2S and reactive oxygen species (such as H2O2) are major regulators of Caenorhabditis elegans lifespan and stress resistance, we hypothesized that a SELENBP1 ortholog in C. elegans would likely be involved in regulating these aspects. Here we characterize Y37A1B.5, a putative selenium-binding protein 1 ortholog in C. elegans with 52% primary structure identity to human SELENBP1. While conferring resistance to toxic concentrations of selenite, Y37A1B.5 also attenuates resistance to oxidative stress and lowers C. elegans lifespan: knockdown of Y37A1B.5 using RNA interference resulted in an approx. 10% increase of C. elegans lifespan and an enhanced resistance against the redox cycler paraquat, as well as enhanced motility. Analyses of transgenic reporter strains suggest hypodermal expression and cytoplasmic localization of Y37A1B.5, whose expression decreases with worm age. We identify the transcriptional coregulator MDT-15 and transcription factor EGL-27 as regulators of Y37A1B.5 levels and show that the lifespan extending effect elicited by downregulation of Y37A1B.5 is independent of known MDT-15 interacting factors, such as DAF-16 and NHR-49. In summary, Y37A1B.5 is an ortholog of SELENBP1 that shortens C. elegans lifespan and lowers resistance against oxidative stress, while allowing for a better survival under toxic selenite concentrations.

| S-EPMC6812014 | biostudies-literature

Transcriptomic profiling of S. cerevisiae wild type and aft2 mutant in response to exposure to selenite

Project description:The yeast S. cerevisiae does not require selenium for growth, so it is an excellent model to investigate the toxicity of this element without interference from its requirement as growth factor as occurs in animal cells. Exposure to selenite interferes with the yeast iron metabolism. Aft2 is a transcription factor related (with Aft1) to maintenance of iron homeostasis. We have found that aft2 cells are highly sensitive to selenite (a common environmental source for selenium). In these experiments we investigate the transcriptional response to a sub-lethal dose of selenite in wild type and aft2 cells. Our results show that the aft2 mutation strongly potentiates the transcriptional response to selenite, showing induction of many genes related to the responses to oxidative stress and DNA damage. Wild type (W303-1A) background and its MML1086 derivative (Daft2) were exposed to 1 mm selenite and samples taken at time 0, 1, 3 and 5 h of selenite treatment. Two biological replicates were prepared for each time-point. Therefore, there are 8 samples per replicate (4 samples for WT and 4 samples for aft2 cells). The WT strain is used here as reference.

2015-12-31 | E-GEOD-70835 | biostudies-arrayexpress

Proteomic and transcriptomic analysis of selenium utilization in Methanococcus maripaludis

Project description:Methanococcus maripaludis utilizes selenocysteine-(Sec-) containing proteins (selenoproteins), mostly active in the organism’s primary energy metabolism, methanogenesis. Under selenium depletion, M. maripaludis employs a set of enzymes containing cysteine (Cys) instead of Sec. The genes coding for these Sec-/Cys-containing isoforms are the only genes known expression of which is influenced by the selenium status of the cell. Using quantitative proteomics and transcriptomics approx. 7% and 12%, respectively, of all genes/proteins were differentially expressed/synthesized in response to the selenium supply. Some of the genes identified involve methanogenesis, nitrogenase functions, and putative transporters. An increase of transcript abundance for putative transporters under selenium-depleted conditions indicated the organism’s effort to tap into alternative sources of selenium. Selenium sources M. maripaludis is known to utilize are selenite and dimethylselenide. To expand this list, a selenium responsive reporter strain was assessed with nine other, environmentally relevant selenium species. While some had a similar biological window as selenite, others were effectively utilized at lower concentrations. Conversely, selenate and seleno-amino acids were only utilized at unphysiologically high concentrations and two compounds were not utilized at all. To address the role of the selenium-regulated putative transporters in selenium transport, M. maripaludis mutant strains lacking one or two of the putative transporters were tested for the capability to utilize the different selenium species. Of the five putative transporters analyzed by loss-of-function mutagenesis, none appeared to be absolutely required for utilizing any of the selenium species tested, indicating they have redundant and/or overlapping specificities, or are not dedicated selenium transporters.

2024-03-27 | PXD047095 | Pride

Changes of transcriptome in Alfalfa (Medicago sativa L.) under selenium treatment

Project description:We studied the application of transcriptome technology in alfalfa selenium treatment. After spraying sodium selenite on the leaves, the process of selenium absorption and assimilation of alfalfa is unknown. The time point of transcriptome determination was determined by measuring the change of selenium content. Our results showed that 12 h was the key point of the change of selenium content in alfalfa, that is, the selenium content increased continuously before 12 h, decreased gradually after 12 h, and remained stable after 48 h. Transcriptome sequencing showed that phosphorus transporter and endocytosis related genes may be involved in selenium absorption at 12 h compared with 0 H. 12-48 h, some thiometabolic pathways may be involved in selenium metabolism and ubiquitination pathway, which may be the detoxification pathway of selenoprotein.

2024-10-27 | GSE186868 | GEO

Selenium toxicity but not deficient or super-nutritional selenium status vastly alters the transcriptome in rodents

Project description:Protein and mRNA levels for several selenoproteins, such as glutathione peroxidase-1 (Gpx1), are down-regulated dramatically by selenium (Se) deficiency. Selenoprotein levels in rats increase sigmoidally with increasing dietary Se and reach defined plateaus at the Se requirement, making them sensitive biomarkers for Se deficiency, but not high for Se status. Biomarkers for high Se status are needed as super-nutritional Se intakes are associated with beneficial and adverse health outcomes, but conventional biomarkers are not especially useful above the Se requirement. To characterize Se regulation of the transcriptome, we conducted 3 microarray experiments in weanling mice and rats fed Se-deficient diets supplemented with levels of Se up to 5 µg Se/g diet. Rats or mice were fed Se-deficient diets supplemented with sodium selenite up to 5 ug Se/g diet for 28 or 35 days. Affymetrix Rat 230 2.0 and Mouse 430 2.0 Genome Arrays were used to analyze gene expression in liver in all studies plus kidney in the mouse study.

2011-01-19 | E-GEOD-23895 | biostudies-arrayexpress

Selenite metabolism and reduction in Ganoderma lucidum

Project description:G. lucidum could reduce selenite to element Se and further aggregated into selenium nanoparticles (SeNPs), simultaneously accompanying by the production of pungent odorous volatile selenium metabolites. iTRAQ-based quantitative proteomic analysis revealed the abundance of proteins involved in selenite reduction.

2022-08-03 | PXD035786 |

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