Amine-containing phospholipid synthesis in Saccharomyces cerevisiae starts with the conversion of CDP-diacylglycerol (CDP-DAG) and serine to phosphatidylserine (PS), whereas phosphatidylinositol (PI) is formed from CDP-DAG and inositol (derived from inositol 1-phosphate). In this study the regulation of PS synthase (encoded by CHO1/PSS), PI synthase (encoded by PIS1), and inositol 1-phosphate synthase (encoded by INO1) activities by the in vivo level of CDP-DAG synthase activity (encoded by CDS1) is described. Reduction in the level of CDP-DAG synthase activity from 10-fold over wild type levels to 10% of wild type levels results in a 7-fold increase in PS synthase activity, which follows a similar change in the CHO1/PSS mRNA level. INO1 mRNA also increases but only after CDP-DAG synthase activity falls below the wild type level. PI synthase activity follows the decrease of the CDP-DAG synthase activity, but there is no parallel change in the level of PIS1 mRNA. These changes in CHO1/PSS and INO1 mRNA levels are mediated by a mechanism not dependent on changes in the expression of the INO2-OPI1 regulatory genes. CDS1 expression is repressed in concert with INO2 expression in response to inositol.
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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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