The Enzyme Database

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Accepted name: sanguinarine reductase
Reaction: (1) dihydrosanguinarine + NAD(P)+ = sanguinarine + NAD(P)H + H+
(2) dihydrochelirubine + NAD(P)+ = chelirubine + NAD(P)H + H+
For diagram of chelirubine, macarpine and sanguinarine biosynthesis, click here
Glossary: sanguinarine = 13-methyl-2H,10H-[1,3]dioxolo[4,5-i][1,3]dioxolo[4′,5′:4,5]benzo[1,2-c]phenanthridinium
dihydrosanguinarine = 13-methyl-13,14-dihydro-2H,10H-[1,3]dioxolo[4,5-i][1,3]dioxolo[4′,5′:4,5]benzo[1,2-c]phenanthridine
chelirubine = 5-methoxy-13-methyl-2H,10H-[1,3]dioxolo[4,5-i][1,3]dioxolo[4′,5′:4,5]benzo[1,2-c]phenanthridinium
dihydrochelirubine = 5-methoxy-13-methyl-13,14-dihydro-2H,10H-[1,3]dioxolo[4,5-i][1,3]dioxolo[4′,5′:4,5]benzo[1,2-c]phenanthridinium
Systematic name: dihydrosanguinarine:NAD(P)+ oxidoreductase
Comments: The enzyme, purified from the California poppy (Eschscholzia californica), is involved in detoxifying the phytoalexin sanguinarine produced by poppy itself (cf. EC, dihydrobenzophenanthridine oxidase), when it binds to the cell wall of the poppy cell. The reaction with NADPH is up to three times faster than that with NADH at low concentrations (<10 uM) of the dinucleotide. At higher concentrations the reaction with NADPH is inhibited but not that with NADH [1].
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Weiss, D., Baumert, A., Vogel, M. and Roos, W. Sanguinarine reductase, a key enzyme of benzophenanthridine detoxification. Plant Cell Environ. 29 (2006) 291–302. [DOI] [PMID: 17080644]
2.  Vogel, M., Lawson, M., Sippl, W., Conrad, U. and Roos, W. Structure and mechanism of sanguinarine reductase, an enzyme of alkaloid detoxification. J. Biol. Chem. 285 (2010) 18397–18406. [DOI] [PMID: 20378534]
[EC created 2014]

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