Tropane alkaloids (TAs) such as anisodamine, anisodine, hyoscyamine and scopolamine are extensively used in clinical practice as anticholinergic agents. Anisodus acutangulus produces TAs in root tissue, and although several genes involved in scopolamine biosynthesis have been cloned, yet the
N-Methylpyrrolinium-derived alkaloids like tropane alkaloids, nicotine, and calystegines are valuable plant source specialized metabolites bearing pharmaceutical or biological activity. Microbial synthesis of the critical common intermediate N-methylpyrrolinium would allow for sustainable production