The effects of overexpression of yeast diphosphoinositol polyphosphate phosphohydrolase (DDP1) having endopolyphosphatase activity on inorganic polyphosphate metabolism in Saccharomyces cerevisiae were studied. The endopolyphosphatase activity in the transformed strain significantly increased compared to the parent strain. This activity was observed with polyphosphates of different chain length, being suppressed by 2 mM tripolyphosphate or ATP. The content of acid-soluble and acid-insoluble polyphosphates under DDP1 overexpression decreased by 9 and 28%, respectively. The average chain length of salt-soluble and alkali-soluble fractions did not change in the overexpressing strain, and that of acid-soluble polyphosphate increased under phosphate excess. At the initial stage of polyphosphate recovery after phosphorus starvation, the chain length of the acid-soluble fraction in transformed cells was lower compared to the recipient strain. This observation suggests the complex nature of DDP1 involvement in the regulation of polyphosphate content and chain length in yeasts.
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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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| 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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