The biosynthesis of carboxypeptidase Y (EC 3.4.16.1) and proteinase A (EC 3.4.23.6) in yeast cells involves a series of posttranslational events, the last of which is dependent upon a function supplied by the PEP4 gene. Because pep4 mutations result in a 90-95% reduction in the levels of activity of at least three additional vacuolar hydrolases, it is likely that these, and perhaps all, yeast vacuolar hydrolases are synthesized as inactive precursors, which mature by a common mechanism that depends upon a function supplied by the PEP4 gene. The pep4 mutation shows an apparent gene dosage effect on levels of activity of proteinases A and B but not on the level of activity of carboxypeptidase Y. This effect appears to come about because the maturation machinery is capable of discriminating among these hydrolase precursors.
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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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