Glucose-triggered signalling in Saccharomyces cerevisiae: different requirements for sugar phosphorylation between cells grown on glucose and those grown on non-fermentable carbon sources

Article Abstract:

The activation of trehalase, repression of CTT1 and SSA3, and induction of ribosomal protein genes in Saccharomyces cerevisiae is regulated by 2 glucose-dependent signalling pathways. Yeast cells, grown on a glucose-containing medium and starved of nitrogen, accumulate high trehalose levels. Rapid mobilization of trehalose occurs on readdition of nitrogen. This nitrogen-induced activation is dependent on the presence of fructose or glucose but independent of phosphorylation of the sugar as is the repression of CTT1 and SSA3 and upshift of ribosomal protein synthesis.

Analysis, Phosphorylation

---

Response of Saccharomyces cerevisiae to changes in external osmolarity

Article Abstract:

Saccharomyces cerevisiae does not relay the signal indicating the presence of a high osmolarity environment, directly to the transcriptional mechanism but rather to a regulator of the mitogen-activated protein kinase (MAPK). Cascades of MAPK are utilized to signal different kinds of stress. These cascades may react to growth-related stimuli, such as nutrients or growth factors. There is an overlap between growth-related cellular mechanisms and response to stress. Protein kinase A is mainly involved in signal integration.

Eukaryotic cells, Cells (Biology), Eukaryotes

---

Different signalling pathways contribute to the control of GPD1 gene expression by osmotic stress in Saccharomyces cerevisiae

Article Abstract:

Yeast cells respond to an elevation in osmolarity through the increase in the cellular content of the osmolyte glycerol. This reaction is accompanied by the stimulation of the expression of genes encoding enzymes in the glycerol production pathway. The osmotic induction of one of these genes, GPD1, which encodes glycerol-3-phosphate dehydrogenase, was studied. Findings showed that osmotic regulation of GPD1 expression is due to an interaction between various signalling pathways.

Genetic aspects, Cellular signal transduction, Glycerol

Similar abstracts:

• Abstracts: Retinoic acid promotes the differentiation of adrenergic cells and melanocytes in quail neural crest cultures
• Abstracts: Microtubule function in morphological differentiation: growth zones and growth cones. RbI2p, a yeast protein that binds to beta-tubulin and participates in microtubule function in vivo
• Abstracts: Demonstration of high-affinity Mn2+ uptake in Saccharomyces cerevisiae: specificity and kinetics. Mixed sulphate-reducing bacterial cultures for bioprecipitation of toxic metals: factorial and response-surface analysis of the effects of dilution rate, sulphate and substrate concentration
• Abstracts: Phylogenetic analyses of some extremely halophilic archaea isolated from dead sea water, determined on the basis of their 16S rRNA sequences
• Abstracts: Organic acid excretion by Streptomyces lividans TK24 during growth on defined carbon and nitrogen sources. Ferric-reductase activities in whole cells and cell fractions of Vibrio (Listonella) anguillarum

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.