the enzyme is involved in the common pathway of benzylisoquinoline alkaloid biosynthesis and the aporphine alkaloid bisynthesis pathway in lotus, overview. A series of enzymes, norcoclaurine 6-O-methyltransferase (6OMT), coclaurineN-methyltransferase (CNMT), (S)-N-methylcoclaurine-3-hydroxylase (NMCH), and 3-hydroxy-N-methylcoclaurine 4'-O-methyltransferase(4'OMT), exhibit catalytic activity to yield the central branchpoint intermediate (S)-reticuline
the expression of isozyme 1 is low in the two cultivars, so it may have little effect on alkaloid contents. The expression of CYP80B, NNU08355, has a positive effect on aporphine alkaloids content in lotus, but exhibits phenotypic lag, which might be because of NMCH which acts early in the benzylisoquinoline alkaloid biosynthetic pathway
Yang, M.; Zhu, L.; Li, L.; Li, J.; Xu, L.; Fen, J.; Liu, Y.
Digital gene expression analysis provides insight into the transcript profile of the genes involved in aporphine alkaloid biosynthesis in lotus (Nelumbo nucifera)