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Reference Report
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| Citation | Missirlis, F., Rahlfs, S., Dimopoulos, N., Bauer, H., Becker, K., Hilliker, A., Phillips, J.P., Jackle, H. (2003). A putative glutathione peroxidase of Drosophila encodes a thioredoxin peroxidase that provides resistance against oxidative stress but fails to complement a lack of catalase activity. Biol. Chem. 384(3): 463--472. (Export to RIS) | ||
| FlyBase ID | FBrf0158751 | ||
| Publication Type | Research paper | ||
| PubMed ID | 12715897 | ||
| PubMed Abstract | Cellular defense systems against reactive oxygen species (ROS) include thioredoxin reductase (TrxR) and glutathione reductase (GR). They generate sulfhydryl-reducing systems which are coupled to antioxidant enzymes, the thioredoxin and glutathione peroxidases (TPx and GPx). The fruit fly Drosophila lacks a functional GR, suggesting that the thioredoxin system is the major source for recycling glutathione. Whole genome in silico analysis identified two non-selenium containing putative GPx genes. We examined the biochemical characteristics of one of these gene products and found that it lacks GPx activity and functions as a TPx. Transgene-dependent overexpression of the newly identified Glutathione peroxidase homolog with thioredoxin peroxidase activity (Gtpx-1) gene increases resistance to experimentally induced oxidative stress, but does not compensate for the loss of catalase, an enzyme which, like GTPx-1, functions to eliminate hydrogen peroxide. The results suggest that GTPx-1 is part of the Drosophila Trx antioxidant defense system but acts in a genetically distinct pathway or in a different cellular compartment than catalase. | ||
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| Language of Publication | English | ||
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Parent Publication
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| Publication Type | Journal | ||
| Abbreviation | Biol. Chem. | ||
| Title | Biological chemistry | ||
| Publication Year | 1996- | ||
| ISBN/ISSN | 1431-6730 | ||
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Data from Reference
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| Alleles (7)
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| Constructs (4)
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| Genes (5)
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| Insertions (2)
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| Natural transposons (1)
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