Bacteria and green plants use the diaminopimelate pathway for the biosynthesis of the essential amino acid, lysine; however, yeast and other higher fungi use the alpha-aminoadipate (AA) pathway. The AA pathway has been investigated in detail biochemically, genetically, and in terms of regulatory mechanisms in the baker's yeast Saccharomyces cerevisiae. The genetic analysis of lysine auxotrophs of S. cerevisiae revealed that there are more than 12 lysine genes for 8 enzyme-catalyzed steps. Lysine genes are not linked to each other and seven of the genes are mapped on six different linkage groups (chromosomes). The gene-enzyme relationships have been determined for ten of the lysine loci which include two unlinked gene functions required for each of AA reductase (LYS2 and LYS5) and Saccharopine reductase (LYS9 and LYS14). Five of the lysine enzymes are localized in mitochondria and three in cytosol. The lysine pathway of S. cerevisiae is regulated by feedback inhibition and end product repression. Two, and possibly three, of the enzymes exhibit general control of amino acid biosynthesis and at least five of the enzymes coded for, by unlinked genes, are simultaneously depressed in a regulatory (repressor) gene-mutant.
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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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