A screening for yeast mutants impaired in mitochondrial protein import led to the identification of two genes (MPII and MPI2) encoding the essential components MIM44 and MIM17 of the inner membrane import machinery. We analyzed twelve additional mutants obtained in the screening and found two further complementation groups. One group represents mutants of SSC1, the gene encoding mitochondrial hsp70, an essential matrix protein required for protein import across the inner membrane. The second complementation group represents mutants of a new gene (MP13) encoding a 23 kDa integral inner membrane protein (MIM23). MIM23 is synthesized without a presequence, and its import to the inner membrane requires a membrane potential. MIM23 contains a domain homologous to half of MIM17. We speculate that MIM23 is a new member of the protein import machinery of the mitochondrial inner membrane.
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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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