Most mitochondrial proteins are synthesized in the cytosol, imported into mitochondria, and sorted to one of the four mitochondrial subcompartments. Here we identified a new inner membrane protein, Tim40, that mediates sorting of small Tim proteins to the intermembrane space. Tim40 is essential for yeast cell growth, and its function in vivo requires six conserved Cys residues but not anchoring of the protein to the inner membrane by its N-terminal hydrophobic segment. Depletion of Tim40 impairs the import of small Tim proteins into mitochondria both in vivo and in vitro. In wild-type mitochondria, Tim40 forms a translocation intermediate with small Tim proteins prior to their assembly in the intermembrane space in vitro. These results suggest the essential role of Tim40 in sorting/assembly of small Tim proteins.
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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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