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Information on EC 4.2.1.139 - pterocarpan synthase

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EC Tree
     4 Lyases
         4.2 Carbon-oxygen lyases
             4.2.1 Hydro-lyases
                4.2.1.139 pterocarpan synthase
IUBMB Comments
The enzyme catalyses the formation of the additional ring in pterocarpan, the basic structure of phytoalexins produced by leguminous plants, including (-)-medicarpin, (+)-medicarpin, (-)-maackiain and (+)-maackiain. The enzyme requires that the hydroxyl group at C-4 of the substrate is in the (4R) configuration. The configuration of the hydrogen atom at C-3 determines whether the pterocarpan is the (+)- or (-)-enantiomer. The enzyme contains amino acid motifs characteristic of dirigent proteins.
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The expected taxonomic range for this enzyme is: Medicago
Synonyms
2',7-dihydroxy-4'-methoxyisoflavanol dehydratase, 7,2'-dihydroxy-4'-methoxyisoflavanol dehydratase, 7,2-dihydroxy-4-methoxyisoflavanol dehydratase, DMI dehydratase, DMID, medicarpan synthase, medicarpin synthase, more
REACTION
REACTION DIAGRAM
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ORGANISM
UNIPROT
LITERATURE
a (4R)-4,2'-dihydroxyisoflavan = a pterocarpan + H2O
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