The Oxa1 protein is a ubiquitous constituent of the inner membrane of mitochondria. Oxa1 was identified in yeast as a crucial component of the protein export machinery known as the OXA translocase, which facilitates the integration of proteins from the mitochondrial matrix into the inner membrane. We have identified the Neurospora crassa Oxa1 protein which shows a sequence identity of 22% to the yeast homologue. Despite the low level of identity, the function of the homologues is conserved as the N. crassa gene fully complemented a yeast null mutant. Genetic analysis revealed that Oxa1 is essential for viability in N. crassa. Cells propagated under conditions that severely reduce Oxa1 levels grew extremely slowly and were deficient in subunits of complex I and complex IV. Isolation of the Oxa1 complex from N. crassa mitochondria revealed a 170-180-kDa complex that contained exclusively Oxa1. Since the Oxa1 monomer has a molecular weight of 43,000, our data suggest that the OXA translocase consists of a homooligomer most likely containing four Oxa1 subunits.
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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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