The import of proteins from the cytosol into the mitochondrial matrix involves the concerted action of two separate import systems: the TOM system in the outer membrane, and the TIM system in the inner membrane. Here we report that the inner-membrane system also sorts proteins to the intermembrane space. Some intermembrane-space proteins, such as cytochromes b2 and c1, are synthesized with a complex pre-sequence consisting of a positively charged matrix targeting signal followed by an uncharged sequence that acts as sorting signal for the intermembrane space. We show that this sorting signal can be efficiently crosslinked to an inner-membrane protein of relative molecular mass 11K after the mature part of the precursor has been sorted to the intermembrane space. The 11K protein, which we term Tim11, is a component of the protein import system in the 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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