The mitochondrial outer membrane contains import receptors for preproteins and a multisubunit general insertion pore. Several small outer membrane proteins (< 10 kDa) have been identified by their association with receptors or the general insertion pore, yet little is known about their function. Here, we present evidence that the biochemically identified Mom8b and the genetically identified Isp6 are identical. A deletion of Mom8b/Isp6 in Saccharomyces cerevisiae leads to (i) a delay of import of preproteins, (ii) stabilization of preprotein binding to receptors and the general insertion pore, and (iii) destabilization of the interaction between receptors and the general insertion pore. These results suggest that Mom8b supports the cooperativity between receptors and the general insertion pore and facilitates the release of preproteins from import components and thereby promotes efficient transfer of preproteins.
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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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