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Sulfiredoxin reactivates peroxiredoxins after oxidative inactivation Sulfiredoxin reduces and thereby re-activates 2-cys peroxiredoxins. Peroxiredoxins act as molecular switches, inactivating in response to hyperoxidation from hydrogen peroxide and other free radicals. Sulfiredoxin reactivates Prx-SO(2)(-) via ATP-Mg(2+)-dependent reduction. Arabidopsis sulfiredoxin has been described as a dual function enzyme, having nuclease activity in addition to the sulfiredoxin activity. This protein is similar to ParB N-terminal-like domain of bacterial and plasmid parABS partitioning systems.
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