A cytochrome P-450 (heme-thiolate) enzyme catalysing an oxidative reaction that does not incorporate oxygen into the product. Forms the methylenedioxy bridge of the protoberberine alkaloid cheilanthifoline by the oxidative ring closure of adjacent phenolic and methoxy groups of scoulerine. cf. EC 18.104.22.168, (S)-nandinine synthase, which catalyses a similar reaction at the other side of the (S)-scoulerine molecule, forming (S)-nandinine.
Bauer, W. and Zenk, M.H. Two methylenedioxy bridge-forming cytochrome P-450 dependent enzymes are involved in (S)-stylopine biosynthesis. Phytochemistry30 (1991) 2953–2961.
Diaz Chavez, M.L., Rolf, M., Gesell, A. and Kutchan, T.M. Characterization of two methylenedioxy bridge-forming cytochrome P450-dependent enzymes of alkaloid formation in the Mexican prickly poppy Argemone mexicana. Arch. Biochem. Biophys.507 (2011) 186–193. [PMID: 21094631]
[EC 22.214.171.124 created 1999 as EC 126.96.36.199, transferred 2002 to EC 188.8.131.52, modified 2016]