The yeast Saccharomyces cerevisiae has the ability to cope with a variety of stress conditions (e.g. zinc deficiency) by regulating the expression of enzyme activities including those involved with phospholipid synthesis. Zinc is an essential mineral required for the growth and metabolism of S. cerevisiae. Depletion of zinc from the growth medium of wild-type cells results in alterations in phospholipid composition including an increase in PI (phosphatidylinositol) and a decrease in phosphatidylethanolamine. These changes can be attributed to an increase in PIS1-encoded PI synthase activity and a decrease in the activities of several CDP-diacylglycerol pathway enzymes including the CHO1-encoded PS (phosphatidylserine) synthase. The reduction in PS synthase in response to zinc depletion is due to a repression mechanism that involves the UAS(INO) (inositol upstream activating sequence) element in the CHO1 promoter and the negative transcription factor Opi1p. These factors are also responsible for the inositol-mediated repression of CHO1. This regulation may play an important role in allowing cells to adapt to zinc deficiency given the essential roles that phospholipids play in the structure and function of cellular membranes.
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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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