Oxidative bicyclic ring system formation involving indole diterpene biosynthesis: Remarkable substrate tolerance of a prenyltransferase and flavoprotein oxidase
diversity of indole diterpenes (IDTs). In this study, we focused on the function of prenyltransferases and flavoprotein oxidases for the synthesis of nodulisporic acid-type and shearinine-type bicyclicrings found on the indole moiety. An in vitro enzymatic reaction of a prenyltransferase JanD, which mediates diprenylation at the C5- and C6-positions, revealed that JanD recognizes a C13‑hydroxy group