Many secretory proteins are synthesized as inactive proproteins that undergo proteolytic activation as they travel through the eukaryotic secretory pathway. The best characterized family of processing enzymes are the prohormone convertases or kexins, and these are responsible for the processing of a wide variety of prohormones and other precursors. Recent work has identified other proteases that appear to be involved in proprotein processing, but characterization of these enzymes is at an early stage. Krp1 is the only kexin identified in the fission yeast Schizosaccharomyces pombe, in which it is essential for cell viability. We have used a genetic screen to identify four proteases with specificities that overlap Krp1. Two are serine proteases, one is a zinc metalloprotease (glycoprotease) and one is an aspartyl protease that belongs to the recently described yapsin family of processing enzymes. All four proteases support the growth of a yeast strain lacking Krp1, and each is able to process the P-factor precursor, the only substrate currently known to be processed by Krp1.
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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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