Transcription of the yeast HXT2 and HXT4 genes, which encode glucose transporters, is induced only by low levels of glucose. This low-glucose-induced expression is mediated by two independent repression mechanisms: in the absence of glucose, transcription of both genes is prevented by Rgt1p, a C6 zinc cluster protein; at high levels of glucose, expression of HXT2 and HXT4 is repressed by Mig1p. Only at low glucose concentrations are both repressors inactive, leading to a 10- to 20-fold induction of gene expression. Mig1p and Rgt1p act directly on HXT2 and HXT4 by binding to their promoters. This transcriptional regulation is physiologically very important to the yeast cell because it causes these glucose transporters to be expressed only in low-glucose media, in which they are required for growth.
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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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