The inositol/choline responsive element (ICRE) functions as a UAS element mediating coordinate expression of structural genes required for yeast phospholipid biosynthesis. However, ICRE motifs could be detected upstream of various genes apparently not involved in lipid metabolism. In this work we investigated the expression pattern of selected genes containing ICRE promoter motifs, as identified by in silico analysis (ARG4, ERG20, FAR8, GPD2, RSF1, URA8, VHT1 and YEL073C). It turned out that the presence of an ICRE upstream of a gene of unknown function indeed allows to conclude for regulation by phospholipid precursors, which is mediated by activators Ino2/Ino4 and the repressor Opi1. We also demonstrated in vitro binding of Ino2/Ino4 heterodimers to promoter regions. Thus, our analysis supports the view that identification of regulatory elements by a database search provides evidence for a specific pattern of gene expression. Activation by pathway-specific regulators may suggest a physiological function for as yet uncharacterized genes.
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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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