Incorporation of deuterium-labelled analogs of isopentenyl diphosphate for the elucidation of the stereochemistry of rubber biosynthesis
作者:Andrew A. Scholte、John C. Vederas
DOI:10.1039/b515750a
日期:——
prepared to investigate the detailed stereochemicalcourse of addition of C5 units during rubber biosynthesis in Hevea brasiliensis and Parthenium argentatum. These analogs were incorporated into the cis-polyisoprene chain by rubber transferase in rubber particles, and the stereochemistry was determined by 2H-NMR analysis of the polymer or of levulinic acid derivatives obtained from its ozonolytic degradation
Two Diterpene Synthases for Spiroalbatene and Cembrene A from<i>Allokutzneria albata</i>
作者:Jan Rinkel、Lukas Lauterbach、Patrick Rabe、Jeroen S. Dickschat
DOI:10.1002/anie.201800385
日期:2018.3.12
Two bacterial diterpenesynthases from the actinomycete Allokutzneria albata were investigated, resulting in the identification of the structurally unprecedented compound spiroalbatene from the first and cembrene A from the second enzyme. Both enzymes were thoroughly investigated in terms of their mechanisms by isotope labeling experiments, site‐directed mutagenesis, and variation of the metal cofactors
On the mechanism of ophiobolin F synthase and the absolute configuration of its product by isotopic labelling experiments
作者:Zhiyang Quan、Jeroen S. Dickschat
DOI:10.1039/d0ob01470b
日期:——
An ophiobolin F synthase homolog was discovered fromAspergilluscalidoustus CBS121601. The cyclisation mechanism of this terpene synthase was investigated by extensive isotopic labelling experiments and the absolute configuration of its product ophiobolin F was elucidated by enantioselective deuteration.
从Aspergillus calidoustus CBS121601中发现了 ophiobolin F 合酶同源物。通过广泛的同位素标记实验研究了该萜烯合酶的环化机制,并通过对映选择性氘化阐明了其产物蛇毒蛋白 F 的绝对构型。
Mechanistic Studies on Trichoacorenol Synthase from
<i>Amycolatopsis benzoatilytica</i>
作者:Jan Rinkel、Jeroen S. Dickschat
DOI:10.1002/cbic.201900584
日期:2020.3.16
Isotopic labeling experiments performed with a newly identified bacterial trichoacorenolsynthase established a 1,5-hydride shift occurring in the cyclization mechanism. During EI-MS analysis, major fragments of the sesquiterpenoid were shown to arise via cryptic hydrogen movements. Therefore, the interpretation of earlier results regarding the cyclization mechanism obtained by feeding experiments
Biosynthesis of the Sesquiterpene Kitaviridene through Skeletal Rearrangement with Formation of a Methyl Group Equivalent
作者:Houchao Xu、Bernd Goldfuss、Jeroen S. Dickschat
DOI:10.1021/acs.orglett.3c01211
日期:2023.5.12
to produce kitaviridene, a sesquiterpene hydrocarbon with an additional methylgroup equivalent in comparison to a regular sesquiterpene. Isotopic labeling experiments together with DFT calculations gave detailed insights into the cyclization cascade toward kitaviridene and explained the formation of the additional methylgroup equivalent.