Cloning and Bacterial Expression of a Sesquiterpene Cyclase from Hyoscyamus muticus and Its Molecular Comparison to Related Terpene Cyclases
作者:Kyoungwhan Back、Joseph Chappell
DOI:10.1074/jbc.270.13.7375
日期:1995.3
(tobacco sesquiterpene cyclase) and casbene synthase (castor bean diterpene cyclase), and the vetispiradiene synthase amino acid sequence was 77% identical with and 81% similar to the tobacco sesquiterpene cyclase. Regions of the vetispiradiene synthase sequence centered around amino acids 60, 100, and 370 were conspicuously different relative to the tobacco sesquiterpene cyclase. The sequence similarity
使用逆转录-聚合酶链反应和常规克隆程序,分离出在鼠尾草中发现的维斯匹戊烯合酶(一种倍半萜环化酶)的基因组和cDNA克隆。RNA印迹杂交显示诱导剂诱导的细胞中与环化酶活性的诱导相符的mRNA诱导,DNA印迹杂交指示6至8个成员的基因家族,并且3个cDNA克隆的细菌表达表明每个编码了vestispiradiene合酶酶活性催化单个反应产物的合成。vetispiradiene合酶基因的内含子-外显子组织与先前描述的5-epi-aristolochene合酶(烟草倍半萜环化酶)和Casbene合酶(蓖麻籽二萜环化酶)相同,vetispiradiene合酶的氨基酸序列与烟草倍半萜环化酶相同,分别为77%和81%。相对于烟草倍半萜环化酶而言,维斯蒂斯匹戊烯合酶序列以氨基酸60、100和370为中心的区域明显不同。烟草和H. muticus酶之间的序列相似性被认为反映了这两种酶共有的几个部分反应的保守性