Glyceollin synthase
Glyceollin synthase
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Glyceollin synthase

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Glyceollin synthase

Glyceollin synthase is an enzyme that catalyzes the last committed step in glyceollin biosynthesis. It has been classified as a cytochrome dependent monooxygenase. It cyclizes a prenyl residue in its starting materials to convert glyceollidins (I and II) into glyceollins (I - III).

This enzyme catalyzes three chemical reactions, for example:


Glyceocarpin can alternatively be converted to glyceollin III


Glyceollin synthase is a cytochrome P450 protein containing heme. It requires a partner cytochrome P450 reductase for functional expression. This uses nicotinamide adenine dinucleotide phosphate. The systematic name of this enzyme class is 2-(or 4-)dimethylallyl-(6aS,11aS)-3,6a,9-trihydroxypterocarpan,NADPH:oxygen oxidoreductase (cyclizing).

The previous enzyme in the pathway to glyceollins, trihydroxypterocarpan dimethylallyltransferase also produces the isomeric compound 4-dimethylallylglycinol. This is also a substrate for glyceollin synthase:

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