Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1285913 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:This SuperSeries is composed of the following subset Series: GSE8015: Pyruvate fermentation vs Lactate-Sulfate GSE8037: Hydrogen vs Lactate as electron donor in Sulfate reduction GSE8071: Pyruvate vs Lactate as electron donor in Sulfate reduction GSE8072: Thiosulfate vs Sulfate as electron acceptor in Sulfate reduction Keywords: SuperSeries Refer to individual Series
2008-04-05 | E-GEOD-8069 | biostudies-arrayexpress
Project description:Methicillin-resistant Staphylococcus aureus (MRSA) strains are important human pathogens and a significant health hazard for hospitals and the food industry. They are resistant to β-lactam antibiotics including methicillin and extremely difficult to treat. In this study, we show that the Staphylococcus aureus COL (MRSA) strain, with a known complete genome, can easily survive and grow under acidic and alkaline conditions (pH 5 and pH9, respectively), both planktonically and as a biofilm. Α microarray-based analysis of both planktonic and biofilm cells was performed under acidic and alkaline conditions showing that several genes are up- or down-regulated under different environmental conditions and growth modes. These genes were coding for transcription regulators, ion transporters, cell wall biosynthetic enzymes, autolytic enzymes, adhesion proteins and antibiotic resistance factors, most of which are associated with biofilm formation. These results will facilitate a better understanding of the physiological adjustments occurring in biofilm-associated S. aureus COL cells growing in acidic or alkaline environments, which will enable the development of new efficient treatment or disinfection strategies. We used microarrays to detail the global programme of gene expression underlying growth of S. aureus COL growing under acidic and alkaline conditions in biofilm or planktonic mode and identified distinct classes of up-regulated genes during this process.
2019-09-27 | GSE138075 | GEO
Project description:Fermenting microbial communities generate hydrogen: its removal through production of acetate, methane, or hydrogen sulfide modulates the efficiency of energy extraction from available nutrients in many ecosystems. We noted that pathway components for acetogenesis are more abundantly and consistently represented in the gut microbiomes of monozygotic twins and their mothers than components for methanogenesis or sulfate reduction, and subsequently analyzed the metabolic potential of two sequenced human gut acetogens, Blautia hydrogenotrophica and Marvinbryantia formatexigens in vitro and in the intestines of gnotobiotic mice harboring a prominent saccharolytic bacterium. To do so, we developed a generally applicable method for multiplex sequencing of expressed microbial mRNAs, and together with mass spectrometry of metabolites, show that these organisms have distinct patterns of substrate utilization. B. hydrogenotrophica targets aliphatic and aromatic amino acids. It increases the efficiency of fermentation by consuming reducing equivalents, thereby maintaining a high NAD+/NADH ratio and boosting acetate production. In contrast, M. formatexigens consumes oligosaccharides, does not impact the redox state of the gut, and boosts the yield of succinate. These findings have strategic implications for those who wish to manipulate the hydrogen economy of gut microbial communities in ways that modulate energy harvest.
2010-05-22 | GSE21906 | GEO
Project description:Fermenting microbial communities generate hydrogen: its removal through production of acetate, methane, or hydrogen sulfide modulates the efficiency of energy extraction from available nutrients in many ecosystems. We noted that pathway components for acetogenesis are more abundantly and consistently represented in the gut microbiomes of monozygotic twins and their mothers than components for methanogenesis or sulfate reduction, and subsequently analyzed the metabolic potential of two sequenced human gut acetogens, Blautia hydrogenotrophica and Marvinbryantia formatexigens in vitro and in the intestines of gnotobiotic mice harboring a prominent saccharolytic bacterium. To do so, we developed a generally applicable method for multiplex sequencing of expressed microbial mRNAs, and together with mass spectrometry of metabolites, show that these organisms have distinct patterns of substrate utilization. B. hydrogenotrophica targets aliphatic and aromatic amino acids. It increases the efficiency of fermentation by consuming reducing equivalents, thereby maintaining a high NAD+/NADH ratio and boosting acetate production. In contrast, M. formatexigens consumes oligosaccharides, does not impact the redox state of the gut, and boosts the yield of succinate. These findings have strategic implications for those who wish to manipulate the hydrogen economy of gut microbial communities in ways that modulate energy harvest. 119 Samples consisting of Bacteroides thetaiotaomicron, Marvinbryantia formatexigens, and Blautia hydrogenotrophica cecal and fecal samples. Please see the individual Sample descriptions for more information.
2010-05-21 | E-GEOD-21906 | biostudies-arrayexpress
Project description:【Objective】 The objective of this study is to study the transcriptome regulation mechanism of F. graminearum under different pH stress conditions, analyze the gene expression level and its differences, and explore the metabolic pathways related to the anti-stress response of F. graminearum cells under acidic or alkaline conditions, and reveal how F. graminearum actively regulates intracellular metabolism and synthesis processes to adapt to the changes of extracellular pH environment. 【Method】 F. graminearum was cultured in PDB (potato dextrose broth) medium with initial pH of 4.5, 6.5 and 8.0 for 48 h, and the total RNA of the strain was extracted to construct a cDNA library. Transcriptome sequencing and bioinformatics techniques were used to identify the related differentially expressed genes (DEGs), and the metabolic pathways involved were further analyzed. 【Result】 A total of 4283 DEGs were detected under acidic conditions, of which 2232 were up-regulated and 2252 were down-regulated. Under alkaline conditions, there were a total of 498 DEGs, of which 269 were up-regulated and 229 were down-regulated. The results of Gene Ontology (GO) functional enrichment analysis showed that 211 GO terms were significantly enriched and 72 were down-regulated under acidic conditions. There were 33 GO terms that were revised upwards and 40 downwards under alkaline conditions. The results of KEGG encyclopedia of genes and Genomes (Kyoto Encyclopedia of Genes and Genomes) enrichment analysis showed that 22 pathways were significantly enriched and 32 pathways were down-regulated under acidic conditions. There were 8 up-regulated pathways and 13 down-regulated pathways under alkaline conditions. The expression of membrane transporters and hydrolysis of carbohydrate compounds and other related genes were up-regulated, and the expression of genes related to protein metabolism was down-regulated, which assisted F. graminearum cells to adapt to changes in the external environment. At the same time, F. graminearum maintained the internal environment balance of its own cells by reducing secondary metabolism and amino acid metabolism under acidic and alkaline conditions, respectively, so as to resist extracellular pH stress. 【Conclusion】 In the acidic environment, Fusarium graminearum adapts to the changes in the extracellular environment by promoting the production of riboprotein complexes and secondary metabolism. In an alkaline environment, Fusarium graminearum cells respond to and sense external stresses through amino acid metabolism. The analysis of the metabolic pathways of F. graminearum cells provides important gene expression data for the response of F. graminearum to different pH environments, and the results of this study are helpful to understand the pathogenesis of F. graminearum.
2025-05-01 | GSE267311 | GEO
Project description:High concenHigh concentration acetic acid in the fermentation medium represses cell growth, metabolism and fermentation efficiency of Saccharomyces cerevisiae, which is widely used for cellulosic ethanol production. Our previous study proved that supplementation of zinc sulfate in the fermentation medium improved cell growth and ethanol fermentation performance of S. cerevisiae under acetic acid stress condition. However, the molecular mechanisms is still unclear. To explore the underlying mechanism of zinc sulfate protection against acetic acid stress, transcriptomic and proteomic analysis were performed. The changed genes and proteins are related to carbon metabolism, amino acid biosynthesis, energy metabolism, vitamin biosynthesis and stress responses. In a total, 28 genes showed same expression in transcriptomic and proteomic data, indicating that zinc sulfate affects gene expression at posttranscriptional and posttranslational levels.tration acetic acid in the fermentation medium represses cell growth, metabolism and fermentation efficiency of Saccharomyces cerevisiae, which is widely used for cellulosic ethanol production. Our previous study proved that supplementation of zinc sulfate in the fermentation medium improved cell growth and ethanol fermentation performance of S. cerevisiae under acetic acid stress condition. However, the molecular mechanisms is still unclear. To explore the underlying mechanism of zinc sulfate protection against acetic acid stress, transcriptomic and proteomic analysis were performed. The changed genes and proteins are related to carbon metabolism, amino acid biosynthesis, energy metabolism, vitamin biosynthesis and stress responses. In a total, 28 genes showed same expression in transcriptomic and proteomic data, indicating that zinc sulfate affects gene expression at posttranscriptional and posttranslational levels.
2022-05-19 | PXD015459 | Pride
Project description:To determine how the fungal sterol homeostasis pathway contributes to the fungal pH response. To do so, we compared the transcriptomes of the sre1∆ mutant strain to that of the WT H99 strain in acidic (pH 4) and alkaline (pH 8) conditions.
2020-03-18 | GSE147109 | GEO
Project description:co-fermentation of sugarcane vinasse and glycerol
| PRJEB47724 | ENA
Project description:Thiosulfate vs Sulfate as electron acceptor in Sulfate reduction
| PRJNA105403 | ENA