Subunit 6 of the yeast cytochrome bc1 complex contains a 25 amino acid presequence that is not present in the mature form of the protein in the bc1 complex. The presequence of subunit 6 is atypical of presequences responsible for targeting proteins to mitochondria. Whereas mitochondrial targeting sequences rarely contain acidic residues and typically contain basic residues that can potentially form an amphiphilic structure, the presequence of subunit 6 contains only one basic amino acid and is enriched in acidic amino acids. If the 25 amino acid presequence is deleted, subunit 6 is imported into mitochondria and assembled into the cytochrome bc1 complex and the activity of the bc1 complex is identical to that from a wild-type yeast strain. However, if the C-terminal 45 amino acids are truncated from the protein, subunit 6 is not present in the mitochondria and the activity of the bc1 complex is diminished by half, identical to that of the bc1 complex from a yeast strain in which the QCR6 gene is deleted. These results indicate that the presequence of subunit 6 is not required for targeting to mitochondria or assembly of the subunit into the bc1 complex and that information necessary for targeting and import into mitochondria may be present in the C-terminus of the protein.
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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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