The Saccharomyces cerevisiae gene HGT1/GSH11 encodes the high affinity glutathione transporter and is repressed by cysteine added to the culture medium. It has been found previously that a 5'-upstream cis-element, CCGCCACAC, is responsible for regulating GSH11 expression and that several proteins bind to this element (Miyake, T., Kanayama, M., Sammoto, H., and Ono, B. (2002) Mol. Genet. Genomics 266, 1004-1011). In this report we present evidence that the most prominent of these proteins is VDE, known previously as the homing endonuclease encoded by VMA1. We show also that GSH11 is not expressed in a VDE-deleted strain and that inability to express the GSH11 of this strain is overcome by introduction of the coding region of VDE or the entire VMA1 gene. It is also found that VDE does not cut DNA in the vicinity of the GSH11 cis-element. Rapamycin, an inhibitor of the target of rapamycin (TOR) signal-transduction system, is found to enhance expression of GSH11 in a VDE-dependent manner under conditions of sulfur starvation. These results indicate that GSH11 is regulated by a system sensitive to sulfur starvation (presumably via cysteine depletion) and a more general system involving the nutritional starvation signal mediated by the TOR system. Both systems need to be operational (inhibition of TOR and sulfur starvation) for full expression of GSH11.
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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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