ID 5.5.1.38 DE tabersonine synthase. CA dehydrosecodine = (-)-tabersonine. CC -!- The enzyme, characterized from the plant Catharanthus roseus CC (Madagascar periwinkle), is a carboxylesterase-like cyclase that CC catalyzes a regio- and enantiodivergent [4+2] cycloaddition reaction CC to generate the iboga scaffold of catharanthine. CC -!- cf. EC 5.5.1.37. //