Cyanocobalamin reductase (cyanide-eliminating)

cob(I)alamin + cyanide + NADP⁺ $rightleftharpoons$ cyanocob(III)alamin + NADPH + H⁺

The 3 substrates of this enzyme are cob(I)alamin, cyanide, and NADP⁺, whereas its 3 products are cyanocob(III)alamin, NADPH, and H⁺.

This enzyme belongs to the family of oxidoreductases, specifically those oxidizing metal ion with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is cob(I)alamin, cyanide:NADP+ oxidoreductase. Other names in common use include cyanocobalamin reductase, cyanocobalamin reductase (NADPH, cyanide-eliminating), cyanocobalamin reductase (NADPH, CN-eliminating), and NADPH:cyanocob(III)alamin oxidoreductase (cyanide-eliminating). This enzyme participates in porphyrin and chlorophyll metabolism. It employs one cofactor, FAD.

References

• Watanabe F, Oki Y, Nakano Y, Kitaoka S "Occurrence and characterization of cyanocobalamin reductase (NADPH CN-eliminating) involved in decyanation of cyanocobalamin in Euglena gracilis". J. Nutr. Sci. Vitaminol. 1–10.

External links

The CAS registry number for this enzyme class is .