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Superoxide Generating Activity of Nicotinamide Coenzymes
- Authors: Sirota T.V1
-
Affiliations:
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences
- Issue: Vol 69, No 1 (2024)
- Pages: 24-31
- Section: Molecular biophysics
- URL: https://journal-vniispk.ru/0006-3029/article/view/257121
- DOI: https://doi.org/10.31857/S0006302924010032
- EDN: https://elibrary.ru/RIBSKI
- ID: 257121
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Abstract
It has been shown that nicotinamide coenzymes (NADPH, NADH, NADP+, NAD+) are capable of generating superoxide anions (O2─●) in an alkaline environment. The superoxide-generating activity of coenzymes is associated with high pH values and is sensitive to SOD. However, nicotinamide itself, being a functional part of coenzyme molecules, does not have this property. Polarographic studies have shown that in the presence of coenzymes, molecular oxygen is consumed from the buffer, namely oxygen activation occurs due to the formation of O2-●. Based on the results obtained and in accordance with the literature, our observations suggest that the formation of adducts of nicotinamide, which is part of the coenzyme molecule, and hydroxyl anions (OH−) may lead to the formation of O2─●. Under mild conditions in the organism, the studied coenzymes, while performing their main functions, are expected to generate superoxide, meaning that they can be signaling molecules.
About the authors
T. V Sirota
Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences
Email: sirotatv@rambler.ru
Institutskaya ul. 3, Pushchino, Moscow Region, 142290, Russia
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