3 结果
Putrescine N-methyltransferase (PMT, EC 2.1.1.53) catalyses the first specific step in the biosynthesis of tropane and nicotine alkaloids. Potato (Solanum tuberosum L.) contains neither nicotine nor the medicinal tropane alkaloids hyoscyamine or scopolamine, but calystegines. They are nortropane
Calystegines are nortropane alkaloids that are found in Solanaceae containing the classical tropane alkaloids hyoscyamine and scopolamine, and in other Solanaceae such as potato, Solanum tuberosum (L.). Calystegines are assumed to derive from the classical tropane alkaloid pathway. We isolated a
Tropinone reductases (TRs) are essential enzymes in the tropane alkaloid biosynthesis, providing either tropine for hyoscyamine and scopolamine formation or providing pseudotropine for calystegines. Two cDNAs coding for TRs were isolated from potato (Solanum tuberosum L.) tuber sprouts and expressed