18.104.22.1688: nicotine blue oxidoreductase
This is an abbreviated version, for detailed information about nicotine blue oxidoreductase, go to the full flat file.
NAD(P)H-nicotine blue oxidoreductase, NAD(P)H-nicotine blue quinone oxidoreductase, nboR
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Systematic Name on EC 22.214.171.1248 - nicotine blue oxidoreductase
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The enzyme, characterized from the nicotine degrading bacterium Arthrobacter nicotinovorans, catalyses the reduction of "nicotine blue" to its hydroquinone form (the opposite direction from that shown). Nicotine blue is the name given to the compound formed by the autocatalytic condensation of two molecules of 2,3,6-trihydroxypyridine, an intermediate in the nicotine degradation pathway. The main role of the enzyme may be to prevent the intracellular formation of nicotine blue semiquinone radicals, which by redox cycling would lead to the formation of toxic reactive oxygen species. The enzyme possesses a slight preference for NADH over NADPH.