Oxygen is essential for the life of aerobic organisms, but reactive oxygen species (ROS) derived from oxygen can be a threat for it. Many genes are involved in generation of ROS, but not much attention has been focused on the reactions from which ROS are generated. We therefore screened for mutants that showed an increased sensitivity to oxidative stress in the nematode Caenorhabditis elegans, and isolated a novel mutant, oxy-4(qa5001). This mutant showed an increased sensitivity to a high concentration of oxygen, and decreased longevity at 20 degrees C but not at 26 degrees C. The genetic analysis has revealed that oxy-4 had a causative mutation in an [FeFe]-hydrogenase-like gene (Y54H5A.4). In the yeast Saccharomyces cerevisiae, a deletion of NAR1, a possible homologue of oxy-4, also caused a similar increased sensitivity to oxygen. [FeFe]-hydrogenases are enzymes that catalyze both the formation and the splitting of molecular hydrogen, and function in anaerobic respiration in anaerobes. In contrast, [FeFe]-hydrogenase-like genes identified in aerobic eukaryotes do not generate hydrogen, and its functional roles are less understood. Our results suggested that [FeFe]-hydrogenase-like genes were involved in the regulation of sensitivity to oxygen in S. cerevisiae and C. elegans.
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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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