The vacuolar protease B of Saccharomyces cerevisiae is a subtilisin-like protease encoded by the PRB1 gene. Antibodies raised against a synthetic peptide and an Escherichia coli-derived PRB1 open reading frame (ORF) protein cross-react with authentic protease B from yeast. By using these antibodies, the posttranslational biosynthetic pathway of protease B has been elucidated. Preproprotease B is a 76-kD unglycosylated precursor that enters the endoplasmic reticulum (ER), where it receives one asparagine-linked (Asn-linked) and an undetermined number of non-Asn-linked carbohydrate side chains. The large glycosylated intermediate is proteolytically processed to a 39-kD form before exiting the ER. In the Golgi complex, the 39-kD form becomes 40 kD, due to elaboration of the Asn-linked side chain. The carboxyterminal end of the 40-kD proprotease B undergoes protease A-mediated processing to a 37-kD intermediate, which in turn is quickly processed to 31-kD mature protease B. The ultimate processing step removes a peptide containing the Asn-linked chain; mature PrB has only non-Asn-linked carbohydrate.
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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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| Evidence ID | Analyze ID | File | Description |
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