Yeast major adenylate kinase (Aky2p), encoded by a single gene, occurs in two subcellular compartments, mitochondria and cytoplasm. Only 6-8% of the protein which has no cleavable presequence is imported into the organelle (Bandlow et al. (1988) Eur. J. Biochem. 178, 451-457). In the wild type two AKY2-derived signals (a major and a minor one) were detected by a monospecific antibody after two-dimensional gel electrophoresis and Western blotting. The signals reflected identical electrophoretic mobilities and were absent from an AKY2-disrupted strain suggesting that they were due to differently modified forms of Aky2p. Two similar signals were found in a mutant defective in protein N-acetylation, however, the pI values of both spots were shifted towards alkaline pH by one charge. This indicated that both forms of Aky2p were N-acetylated in the wild type and that their charge difference was not caused by incomplete N-acetylation. This observation furthermore suggested that, in the wild type, two different modifications exist one of which is N-acetylation. The second modification remains unidentified. We analysed the influence of protein N-acetylation on mitochondrial import. Both versions of Aky2p occurred in the cytoplasm and in mitochondria. Their proportion was unchanged in the N-acetylation mutant showing that neither modification affected the efficiency of import of adenylate kinase into mitochondria. It is discussed that N-acetylation occurs during or immediately after translation in the cytoplasm so that import of adenylate kinase may ensue co-translationally.
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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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