The enzymatic cyclization of nerolidyl diphosphate by δ-cadinene synthase from cotton stele tissue infected with verticillium dahliae
作者:Iris Alchanati、Jo Ann Acreman Patel、Jinggao Liu、Chauncey R. Benedict、Robert D. Stipanovic、Alois A. Bell、Yunxing Cui、Clint W. Magill
DOI:10.1016/s0031-9422(98)80054-x
日期:1998.3
containing δ-cadinene synthase convert (1- RS )-[1- 2 H]- E,E -farnesyl diphosphate to [5- 2 H]- and [11- 2 H]-δ-cadinene and convert [4,4,13,13,13- 2 H 5 ]-nerolidyl diphosphate to [8,8,15,15,15- 2 H 5 ]-δ-cadinene. These data imply that nerolidyl diphosphate is an intermediate in the enzymatic cyclization of the natural substrate E,E -farnesyl diphosphate to δ-cadinene by δ-cadinene synthase and involves
摘要 含有δ-卡二烯合酶的大丽轮枝菌感染棉花中柱组织的可溶性制剂将 (1- RS )-[1- 2 H]- E,E-法呢基二磷酸转化为 [5- 2 H]- 和 [11- 2 H] ]-δ-卡二烯并将[4,4,13,13,13- 2 H 5 ]-橙花酸二磷酸酯转化为[8,8,15,15,15- 2 H 5 ]-δ-卡二烯。这些数据暗示橙花酸二磷酸是天然底物 E,E-法呢基二磷酸通过 δ-卡二烯合酶酶促环化为 δ-卡二烯的中间体,涉及将 E,E-法呢基二磷酸转化为橙花酸二磷酸,然后环化为顺式-germacradienyl 阳离子,1,3-氢化物位移,第二次环化成cadinanyl 阳离子和去质子化成δ-cadinene。诱导的 δ-卡二烯合酶 mRNA 的动力学分析,在感染大丽花轮枝菌的棉花中柱组织中 δ-卡地烯合酶活性和倍半萜类植物抗毒素的形成表明,真菌接种后 12 小时,δ-卡地烯合酶 mRNA