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NADPH-generating dehydrogenases: their role in the mechanism of protection against nitro-oxidative stress induced by adverse environmental conditions

AuthorsCorpas, Francisco J.; Barroso-Albarracín, Juan Bautista
Issue Date2-Dec-2014
PublisherFrontiers Media
CitationFrontiers in Environmental Science 2: 55 (2014)
AbstractNADPH is an essential reductive coenzyme in biosynthetic processes such as cell growth, proliferation, and detoxification in eukaryotic cells. It is required by antioxidative systems such as the ascorbate-glutathione cycle and is also necessary for the generation of superoxide radicals by plant NADPH oxidases and for the generation of nitric oxide (NO) by L-arginine-dependent nitric oxide synthase. This coenzyme is principally re-generated by a group of NADP-dehydrogenases enzymes including glucose-6-phosphate dehydrogenase (G6PDH) and 6-phosphogluconate dehydrogenase (6PGDH), both belonging to the pentose phosphate pathway, the NADP-malic enzyme (NADP-ME), and NADP-isocitrate dehydrogenase (NADP-ICDH). In this study, current perspectives on these enzymes in higher plants under different stress situations are reviewed and it is also pointed out that this group of NADPH-generating dehydrogenases is a key element in supporting the mechanism of response to nitro-oxidative stress situations.
Publisher version (URL)http://dx.doi.org/10.3389/fenvs.2014.00055
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