In the yeast Saccharomyces cerevisiae, the expression of phospholipid biosynthetic genes, including the INO1 gene (encoding inositol-1-phosphate synthase), is coordinately regulated by a cis-acting transcriptional element, UAS(INO) (inositol-sensitive upstream activating sequence). For this paper we studied the effect of SCS2 disruption on INO1 expression. SCS2 encodes a type II membrane protein and its deletion leads to inositol auxotrophy at temperatures above 34 degrees C. We found that the expression of the INO1 gene was reduced in the scs2Delta strain even when the cells were cultured under derepressing conditions for INO1 expression. However, the beta-galactosidase gene fused with the INO1 promoter region was expressed normally in the scs2Delta strain. The phospholipid composition of scs2Delta cells was not dramatically changed compared with wild-type cells at 28 degrees C, but the phosphatidylinositol level was reduced in scs2Delta cells cultured at 34 degrees C. In addition, elevated phosphatidylcholine synthesis through the CDP-choline pathway was observed in the scs2Delta strain, and the disruption of genes involved in the CDP-choline pathway rescued the INO1 expression defect of the scs2Delta strain. These results indicate that Scs2p can contribute to coordinated phospholipid metabolism including INO1 expression by regulating phosphatidylcholine synthesis through the CDP-choline pathway.
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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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