The matrix processing peptidase from yeast (Saccharomyces cerevisiae) mitochondria was expressed in Escherichia coli via a plasmid-borne operon encoding the mature forms of the alpha and beta subunits of the enzyme. The subunits assembled into a fully active, soluble enzyme. The mature subunits were also expressed individually. The alpha subunit accumulated in large amounts and was obtained at a purity of 80% after a single chromatographic step. The beta-subunit-producing strain expressed an intact and a degraded form of the beta subunit, both of them soluble in the cytoplasm. Extract from either the alpha- or the beta-subunit-producing strain (S-alpha or S-beta extract, respectively), as well as the purified alpha subunit, was enzymatically inactive. However, precursor cleavage activity was restored by mixing either the S-alpha extract or the purified alpha subunit with the S-beta extract. The reconstituted processing activity was indistinguishable from the authentic holopeptidase.
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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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