Aspartyl aminopeptidase (EC 3.4.11.21) cleaves only unblocked N-terminal acidic amino-acid residues. To date, it has been found only in mammals. We report here that aspartyl aminopeptidase activity is present in yeast. Yeast aminopeptidase is encoded by an uncharacterized gene in chromosome VIII (YHR113W, Saccharomyces Genome Database). Yeast aspartyl aminopeptidase preferentially cleaved the unblocked N-terminal acidic amino-acid residue of peptides; the optimum pH for this activity was within the neutral range. The metalloproteases inhibitors EDTA and 1.10-phenanthroline both inhibited the activity of the enzyme, whereas bestatin, an inhibitor of most aminopeptidases, did not affect enzyme activity. Gel filtration chromatography revealed that the molecular mass of the native form of yeast aspartyl aminopeptidase is approximately 680,000. SDS/PAGE of purified yeast aspartyl aminopeptidase produced a single 56-kDa band, indicating that this enzyme comprises 12 identical subunits.
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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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