The content of inorganic polyphosphates (polyP) in vacuoles of the yeast Saccharomyces cerevisiae is approximately 15% of the total cellular polyP. Over 80% of the vacuole polyP are in an acid-soluble fraction. It was first established by (31)P-NMR spectroscopy that a polymeric degree (n) of two subfractions obtained by precipitation with Ba(2+) in succession at pH 4.5 and 8.2 was approximately 20 +/- 5 and 5 +/- 2 residues of ortho-phosphoric acid, respectively. Under a deficit of phosphate (P(i)) in the cultivation medium, the polyP content in vacuoles decreased approximately 7-fold with the same drastic reduction of their content in the cell. Unlike intact yeast cells, where polyP overcompensation is observed after their transfer from phosphate-free to phosphate-containing medium, the vacuoles do not show this effect. The data indicate the occurrence of special regulatory mechanisms of polyP synthesis in vacuoles differing from those in the whole cell.
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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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