Incubation of yeast Saccharomyces cerevisiae at very low (0.02%) glucose levels led to arrest of the cell cycle at the G0/G1 phase. Readdition of glucose to these "starved" yeast resulted in cell proliferation. In glucose-starved yeast, glucose stimulated 32P incorporation into phosphatidic acid, phosphatidylinositol, phosphatidylinositol monophosphate, and phosphatidylinositol bisphosphate but not into phosphatidylethanolamine and phosphatidylcholine. Preincubation of yeast with [3H]inositol and subsequent exposure to glucose resulted in rapid formation of [3H]inositol monophosphate and [3H]inositol trisphosphate, presumably derived from phosphatidylinositol and phosphatidylinositol bisphosphate. Under similar conditions, glucose elicited both efflux and influx of Ca2+ in yeast. Glucose-induced 32P incorporation into inositolphospholipids and formation of [3H]inositol phosphates were more pronounced in RAS-related mutants such as ras1, ras1 ras2 bcy1, and RAS2Val19 than in the wild-type strain. These results strongly suggest that glucose stimulates inositolphospholipid turnover, Ca2+ mobilization, and subsequent cell proliferation in a manner similar to that of growth factors with mammalian cells, and that RAS-encoded proteins are involved in regulation of this glucose-induced inositolphospholipid turnover in yeast.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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