Characterization of two genes for the biosynthesis of abietane-type diterpenes in rosemary (Rosmarinus officinalis) glandular trichomes
作者:Kathleen Brückner、Dragana Božić、David Manzano、Dimitra Papaefthimiou、Irini Pateraki、Ulschan Scheler、Albert Ferrer、Ric C.H. de Vos、Angelos K. Kanellis、Alain Tissier
DOI:10.1016/j.phytochem.2014.01.021
日期:2014.5
the first committed steps. Thus, a copalyl diphosphate synthase (RoCPS1) and two kaurene synthase-like (RoKSL1 and RoKSL2) encoding genes were identified and characterized. Expression in yeast (Saccharomyces cerevisiae) and Nicotiana benthamiana demonstrate that RoCPS1 converts geranylgeranyl diphosphate (GGDP) to copalyl diphosphate (CDP) of normal stereochemistry and that both RoKSL1 and RoKSL2 use
Modelling-based mutagenesis of three aminoacids in the related ferruginol synthase (CYP76AH1) from S. miltiorrhiza is sufficient to convert it to a 11-hydroxyferruginol synthase (HFS). The three sequential C20 oxidations for the conversion of 11-hydroxyferruginol to carnosic acid are catalysed by the related CYP76AK6-8. The availability of the genes for the biosynthesis of carnosic acid opens opportunities
A Functional Genomics Approach to Tanshinone Biosynthesis Provides Stereochemical Insights
作者:Wei Gao、Matthew L. Hillwig、Luqi Huang、Guanghong Cui、Xueyong Wang、Jianqiang Kong、Bin Yang、Reuben J. Peters
DOI:10.1021/ol902051v
日期:2009.11.19
Tanshinones are abietane-type norditerpenoid quinone natural products that are the bioactive components of the Chinese medicinal herb Salvia miltiorrhiza Bunge. The initial results from a functional genomics-based investigation of tanshinone biosynthesis, specifically the functional identification of the relevant diterpene synthases from S. miltiorrhiza, are reported, The cyclohexa-1,4-diene arrangement of the distal ring poises the resulting miltiradiene for the ensuing aromatization and hydroxylation to ferruginol suggested for tanshinone biosynthesis.
Enzymatic 13C Labeling and Multidimensional NMR Analysis of Miltiradiene Synthesized by Bifunctional Diterpene Cyclase in Selaginella moellendorffii
Diterpenes show diverse chemical structures and various physiological roles. The diversity of diterpene is primarily established by diterpenecyclases that catalyze a cyclization reaction to form the carbon skeleton of cyclic diterpene. Diterpenecyclases are divided into two types, monofunctional and bifunctional cyclases. Bifunctional diterpenecyclases (BDTCs) are involved in hormone and defense
二萜表现出不同的化学结构和各种生理作用。二萜的多样性主要是由催化环化反应形成环状二萜碳骨架的二萜环化酶建立的。二萜环化酶分为单功能环化酶和双功能环化酶两种。双功能二萜环化酶 (BDTC) 分别参与苔藓植物和裸子植物的激素和防御化合物生物合成。BDTC 催化香叶基香叶基二磷酸 (GGDP) 的连续两步 B 型(质子化引发的环化)和 A 型(电离引发的环化)反应。我们发现石松属植物 Selaginella moellendorffii 的基因组包含 6 个 BDTC 基因,其中大部分是未鉴定的。来自 S. moellendorffii 的 cDNA 编码 BDTC 样酶,miltiradiene 合酶 (SmMDS) 被克隆。重组 SmMDS 将 GGDP 转化为分子量为 272 Da 的二萜烃产物。SmMDS 的 B 型活性基序中的突变消除了环化酶活性,而 (+)-copalyl 二磷酸,即
Carnosic acid biosynthesis elucidated by a synthetic biology platform
作者:Codruta Ignea、Anastasia Athanasakoglou、Efstathia Ioannou、Panagiota Georgantea、Fotini A. Trikka、Sofia Loupassaki、Vassilios Roussis、Antonios M. Makris、Sotirios C. Kampranis
DOI:10.1073/pnas.1523787113
日期:2016.3.29
Syntheticbiology approaches achieving the reconstruction of specific plant natural product biosynthetic pathways in dedicated microbial “chassis” have provided access to important industrial compounds (e.g., artemisinin, resveratrol, vanillin). However, the potential of such production systems to facilitate elucidation of plant biosynthetic pathways has been underexplored. Here we report on the..