Dioxygenases, Key Enzymes to Determine the Aglycon Structures of Fusicoccin and Brassicicene, Diterpene Compounds Produced by Fungi
作者:Yusuke Ono、Atsushi Minami、Motoyoshi Noike、Yusuke Higuchi、Tomonobu Toyomasu、Takeshi Sassa、Nobuo Kato、Tohru Dairi
DOI:10.1021/ja107785u
日期:2011.3.2
two cytochrome P450s, which were responsible for the formation of fusicocca-2,10(14)-diene-8β,16-diol. In this study, we report that a α-ketoglutarate dependent dioxygenase, the gene coding for which was located in the cluster, catalyzed a hydroxylation at the 3-position of fusicocca-2,10(14)-diene-8β,16-diol. On the other hand, a α-ketoglutarate-dependent dioxygenase, which had been identified in a
Fusicoccin A 和 cotylenin A 是结构相关的二萜糖苷,显示出类似植物激素的活性。然而,只有子叶素 A 诱导人髓系白血病细胞分化。由于cotylenin A生产者在保存过程中失去了增殖能力,进行了结构与活性关系的研究,发现3位羟基修饰的fusicoccin A表现出与cotylenin A相似的生物活性。然后寻找催化将羟基引入3-位的酶源,发现与在3-位具有羟基的fusicoccin A结构相关的芸苔素C是由Alternaria brasicicola ATCC96836产生的。我们最近克隆了一个芸苔属 C 生物合成基因簇,包括编码 fusicocca-2,10(14)-diene 合酶和两个细胞色素 P450 的基因,它们负责形成 fusicocca-2,10(14)-diene-8β,16 -二醇。在这项研究中,我们报告了 α-酮戊二酸依赖性双加氧酶,其编码基因位于簇中,催化