Sulfur assimilation improves SAM-dependent methylation
Ontology highlight
ABSTRACT:
ORGANISM(S): Saccharomyces Cerevisiae
SUBMITTER: 
Yingjin Yuan
PROVIDER: PXD066499 | iProX | Wed Jul 23 00:00:00 GMT+01:00 2025
REPOSITORIES: iProX
Publications
Sulfur assimilation determines S-adenosyl-l-methionine flux for enhancing methylation efficiency in heterologous biosynthesis.
Zhang Xinchen X Wang Ying Y Huang Wenpei W Wei Changrui C Zhao Meng M Zhou Yongjin J YJ Yuan Yingjin Y
Trends in biotechnology 20260403
S-adenosyl-l-methionine (SAM) is not only crucial for cellular physiological processes as a methyl donor and signaling molecule but also a methyl donor for heterologous biosynthesis. Efforts for increasing SAM availability have focused primarily on improving the efficiency of C1 cycle (SAM cycle), while the total flux of SAM has been largely overlooked. Here, we found that sulfur assimilation-specifically, the first reduction step of sulfate catalyzed by MET3, MET14, and MET16-has a determined i ...[more]
Similar Datasets
Project description:We employed omic data and conducted comparative analysis in Saccharomyces cerevisiae strains with different S-adenosine-L-methionine (SAM) level. This strategy can help us locate the limiting factor for SAM availability. We found sulfur assimilation emerged as the most significantly enriched pathway and further confirmed that sulfur assimilation was the dominant limiting step of SAM biosynthesis in the whole cell system.
2025-07-22 | GSE302904 | GEO
Project description:Sulfur assimilation improves SAM-dependent methylation
| PRJNA1292800 | ENA
Project description:Candidatus Pelagibacter ubique is the most abundant marine microorganism, but is unable to utilize inorganic sulfur compounds that are plentiful in the ocean. To investigate how these cells adapt to organic sulfur limitation, batch cultures were grown in defined media containing either limiting or non-limiting amounts of dimethylsulfoniopropionate (DMSP) as the sole sulfur source. Protein and mRNA expression were measured during exponential growth, immediately prior to stationary phase, and in late stationary phase. Two distinct responses were observed: one as DMSP approached exhaustion, and another after the DMSP supply was depleted. The first response was characterized by increased transcription and translation of all Ca. P. ubique genes downstream of previously confirmed S-adenosyl methionine (SAM) riboswitches: bhmT, mmuM, and metY. These genes were up to 33 times more abundant during low DMSP conditions and shunt all available sulfur to methionine. The osmotically inducible organic hydroperoxidase OsmC was the most up-regulated protein as DMSP (an osmolyte) became scarce. The second response, during sulfur-depleted stationary phase, saw increased transcription of the heme c shuttle ccmC and two small genes of unknown function (SAR11_1163 and SAR11_1164) which were 6-10 times higher in sulfur-starved cultures. No known membrane transporters were up-regulated in response to sulfur limitation, suggesting that this bacterium's strategy for coping with sulfur stress focuses on intracellularly redistributing, rather than importing, organic sulfur compounds. This supports the conclusion that the few organosulfur molecules that Ca. P. ubique is able to metabolize are rarely limiting in the marine environment. Batch cultures of P. ubique were grown in a defined arificial seawater media. Five cultures were amended with a limiting concentration of DMSP as the sole sulfur source and another four control cultures were amended with a non-limiting DMSP concentration. Cultures were harvested for microarray analyses at multiple timepoints for the purpose of observing differences in gene expression related to sulfur limitation. Proteomic analyses were conducted in parallel and are available at https://www.ebi.ac.uk/pride/archive/projects/PXD003672 .
2016-06-26 | E-GEOD-31630 | biostudies-arrayexpress
Project description:Candidatus Pelagibacter ubique is the most abundant marine microorganism, but is unable to utilize inorganic sulfur compounds that are plentiful in the ocean. To investigate how these cells adapt to organic sulfur limitation, batch cultures were grown in defined media containing either limiting or non-limiting amounts of dimethylsulfoniopropionate (DMSP) as the sole sulfur source. Protein and mRNA expression were measured during exponential growth, immediately prior to stationary phase, and in late stationary phase. Two distinct responses were observed: one as DMSP approached exhaustion, and another after the DMSP supply was depleted. The first response was characterized by increased transcription and translation of all Ca. P. ubique genes downstream of previously confirmed S-adenosyl methionine (SAM) riboswitches: bhmT, mmuM, and metY. These genes were up to 33 times more abundant during low DMSP conditions and shunt all available sulfur to methionine. The osmotically inducible organic hydroperoxidase OsmC was the most up-regulated protein as DMSP (an osmolyte) became scarce. The second response, during sulfur-depleted stationary phase, saw increased transcription of the heme c shuttle ccmC and two small genes of unknown function (SAR11_1163 and SAR11_1164) which were 6-10 times higher in sulfur-starved cultures. No known membrane transporters were up-regulated in response to sulfur limitation, suggesting that this bacterium's strategy for coping with sulfur stress focuses on intracellularly redistributing, rather than importing, organic sulfur compounds. This supports the conclusion that the few organosulfur molecules that Ca. P. ubique is able to metabolize are rarely limiting in the marine environment.
2016-06-26 | GSE31630 | GEO
Project description:volved enabling cells to evade toxicity and acquire tolerance. Herein, we explored how Saccharomyces cerevisiae (budding yeast) respond to trivalent arsenic (arsenite) by quantitative and kinetic transcriptome, proteome and sulfur metabolite profiling. Arsenite exposure affected transcription of genes encoding functions related to protein biosynthesis, arsenic detoxification, oxidative stress defense, redox maintenance and proteolytic activity. Importantly, enzymes involved in sulfate assimilation and glutathione biosynthesis were induced at both gene and protein levels. Kinetic metabolic profiling evidenced a significant increase in the pools of sulfur metabolites as well as elevated glutathione levels. Moreover, the flux in the sulfur assimilation pathway as well as the glutathione synthesis rate strongly increased with a concomitant reduction of sulfur incorporation into proteins. By combining comparative genomics and molecular analyses, we pin-pointed transcription factors that mediate thecore of the transcriptional response to arsenite. Taken together, our data reveals that arsenite-exposed cells channel a large part of assimilated sulfur into glutathione biosynthesis and we provide evidence that the transcriptional regulators Yap1p and Met4p control this response in concert. Keywords: stress
2007-10-18 | GSE6071 | GEO
Project description:Responses of photosynthetic organisms to sulfur starvation include (i) increasing the capacity of the cell for transporting and/or assimilating exogenous sulfate, (ii) restructuring cellular features to conserve sulfur resources, and (iii) modulating metabolic processes and rates of cell growth and division. We used microarray analyses to obtain a genome-level view of changes in mRNA abundances in the green alga Chlamydomonas reinhardtii during sulfur starvation. The work confirms and extends upon previous findings showing that sulfur deprivation elicits changes in levels of transcripts for proteins that help scavenge sulfate and economize on the use of sulfur resources. Changes in levels of transcripts encoding members of the light-harvesting polypeptide family, such as LhcSR2, suggest restructuring of the photosynthetic apparatus during sulfur deprivation. There are also significant changes in levels of transcripts encoding enzymes involved in metabolic processes (e.g., carbon metabolism), intracellular proteolysis, and the amelioration of oxidative damage; a marked and sustained increase in mRNAs for a putative vanadium chloroperoxidase and a peroxiredoxin may help prolong survival of C. reinhardtii during sulfur deprivation. Furthermore, many of the sulfur stress-regulated transcripts (encoding polypeptides associated with sulfate uptake and assimilation, oxidative stress, and photosynthetic function) are not properly regulated in the sac1 mutant of C. reinhardtii, a strain that dies much more rapidly than parental cells during sulfur deprivation. Interestingly, sulfur stress elicits dramatic changes in levels of transcripts encoding putative chloroplast-localized chaperones in the sac1 mutant but not in the parental strain. These results suggest various strategies used by photosynthetic organisms during acclimation to nutrient-limited growth. An all pairs experiment design type is where all labeled extracts are compared to every other labeled extract. Keywords: all_pairs
2005-07-28 | GSE3015 | GEO
Project description:Arsenic is ubiquitously present in nature and various mechanisms have evolved enabling cells to evade toxicity and acquire tolerance. Herein, we explored how Saccharomyces cerevisiae (budding yeast) respond to trivalent arsenic (arsenite) by quantitative and kinetic transcriptome, proteome and sulfur metabolite profiling. Arsenite exposure affected transcription of genes encoding functions related to protein biosynthesis, arsenic detoxification, oxidative stress defense, redox maintenance and proteolytic activity. Importantly, enzymes involved in sulfate assimilation and glutathione biosynthesis were induced at both gene and protein levels. Kinetic metabolic profiling evidenced a significant increase in the pools of sulfur metabolites as well as elevated glutathione levels. Moreover, the flux in the sulfur assimilation pathway as well as the glutathione synthesis rate strongly increased with a concomitant reduction of sulfur incorporation into proteins. By combining comparative genomics and molecular analyses, we pin-pointed transcription factors that mediate thecore of the transcriptional response to arsenite. Taken together, our data reveals that arsenite-exposed cells channel a large part of assimilated sulfur into glutathione biosynthesis and we provide evidence that the transcriptional regulators Yap1p and Met4p control this response in concert. Keywords: stress
2007-10-18 | GSE6067 | GEO
Project description:Arsenic is ubiquitously present in nature and various mechanisms have evolved enabling cells to evade toxicity and acquire tolerance. Herein, we explored how Saccharomyces cerevisiae (budding yeast) respond to trivalent arsenic (arsenite) by quantitative and kinetic transcriptome, proteome and sulfur metabolite profiling. Arsenite exposure affected transcription of genes encoding functions related to protein biosynthesis, arsenic detoxification, oxidative stress defense, redox maintenance and proteolytic activity. Importantly, enzymes involved in sulfate assimilation and glutathione biosynthesis were induced at both gene and protein levels. Kinetic metabolic profiling evidenced a significant increase in the pools of sulfur metabolites as well as elevated glutathione levels. Moreover, the flux in the sulfur assimilation pathway as well as the glutathione synthesis rate strongly increased with a concomitant reduction of sulfur incorporation into proteins. By combining comparative genomics and molecular analyses, we pin-pointed transcription factors that mediate thecore of the transcriptional response to arsenite. Taken together, our data reveals that arsenite-exposed cells channel a large part of assimilated sulfur into glutathione biosynthesis and we provide evidence that the transcriptional regulators Yap1p and Met4p control this response in concert. Keywords: stress
2007-10-18 | GSE6072 | GEO
Project description:Arsenic is ubiquitously present in nature and various mechanisms have evolved enabling cells to evade toxicity and acquire tolerance. Herein, we explored how Saccharomyces cerevisiae (budding yeast) respond to trivalent arsenic (arsenite) by quantitative and kinetic transcriptome, proteome and sulfur metabolite profiling. Arsenite exposure affected transcription of genes encoding functions related to protein biosynthesis, arsenic detoxification, oxidative stress defense, redox maintenance and proteolytic activity. Importantly, enzymes involved in sulfate assimilation and glutathione biosynthesis were induced at both gene and protein levels. Kinetic metabolic profiling evidenced a significant increase in the pools of sulfur metabolites as well as elevated glutathione levels. Moreover, the flux in the sulfur assimilation pathway as well as the glutathione synthesis rate strongly increased with a concomitant reduction of sulfur incorporation into proteins. By combining comparative genomics and molecular analyses, we pin-pointed transcription factors that mediate thecore of the transcriptional response to arsenite. Taken together, our data reveals that arsenite-exposed cells channel a large part of assimilated sulfur into glutathione biosynthesis and we provide evidence that the transcriptional regulators Yap1p and Met4p control this response in concert. Keywords: stress
2007-10-18 | GSE6070 | GEO
Project description:Arsenic is ubiquitously present in nature and various mechanisms have evolved enabling cells to evade toxicity and acquire tolerance. Herein, we explored how Saccharomyces cerevisiae (budding yeast) respond to trivalent arsenic (arsenite) by quantitative and kinetic transcriptome, proteome and sulfur metabolite profiling. Arsenite exposure affected transcription of genes encoding functions related to protein biosynthesis, arsenic detoxification, oxidative stress defense, redox maintenance and proteolytic activity. Importantly, enzymes involved in sulfate assimilation and glutathione biosynthesis were induced at both gene and protein levels. Kinetic metabolic profiling evidenced a significant increase in the pools of sulfur metabolites as well as elevated glutathione levels. Moreover, the flux in the sulfur assimilation pathway as well as the glutathione synthesis rate strongly increased with a concomitant reduction of sulfur incorporation into proteins. By combining comparative genomics and molecular analyses, we pin-pointed transcription factors that mediate thecore of the transcriptional response to arsenite. Taken together, our data reveals that arsenite-exposed cells channel a large part of assimilated sulfur into glutathione biosynthesis and we provide evidence that the transcriptional regulators Yap1p and Met4p control this response in concert. Keywords: stress, time course
2007-10-18 | GSE6068 | GEO