Certain gene mutations in Drosophila melanogaster cause sluggish motor activity. We have localized the transcription unit of the sluggish-A gene to a 14.7-kb region at the base of the X chromosome and have cloned corresponding cDNAs. The predicted protein product has significant sequence similarity to Saccharomyces cerevisiae proline oxidase (EC 1.5.99.8), a mitochondrial enzyme which catalyzes the first step in the conversion of proline to glutamate. In the mutant fly, mitochondrial proline oxidase activity is reduced and has kinetic properties different from those of the wild type, providing further evidence that the gene encodes proline oxidase. Indeed, the free proline level in mutant flies is elevated. When the mutant is rescued by transformation, the proline oxidase and free proline levels, as well as the motor and phototactic behavior, are restored to normal. During embryonic development the sluggish-A transcript is predominantly expressed in the nervous system. Significantly, it has previously been reported that a mouse mutant, PRO/Re, which has reduced proline oxidase activity and elevated free proline levels, also exhibits sluggish behavior.
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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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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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