Maltose fermenting strains of Saccharomyces cerevisiae have one or more complex loci called MAL. Each locus comprises at least three genes: MALx1 encodes maltose permease, MALx2 encodes maltase, and MALx3 encodes an activator of MALx1 and MALx2 (x denotes one of five MAL loci, with x = 1, 2, 3, 4, or 6). The MAL43c allele is constitutive and relatively insensitive to glucose repression. To understand better this unique phenotype of MAL43c, we have isolated several MAL63c constitutive mutants from a MAL6 strain. All constitutive mutants remain glucose repressible, and all have multiple amino acid substitutions in the C-terminal region, now making this region of Mal63cp similar to that of Mal43cp. These changes have been generated by gene conversion, which transfers DNA from the telomeres of chromosome II and chromosome III or XVI to chromosome VIII (MAL6). The removal of a Mig1p binding site from the MAL63c promoter leads to a loss of glucose repression, imitating the phenotype of MAL43c. Conversely, addition of a Mig1p binding site to the promoter of MAL43c converts it to glucose sensitivity. Mig1p modulation of Mal63p and Mal43p expression therefore plays a substantial role in glucose repression of the MAL 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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