ω-Fluoro Thiafatty Acids: New Mechanistic Probes of Desaturase-Mediated Reactions
作者:Derek J. Hodgson、Kim Y. Y. Lao、Brian Dawson、Peter H. Buist
DOI:10.1002/hlca.200390312
日期:2003.11
A series of 18-fluoro thiastearates were prepared and incubated with a yeast Δ9-desaturating system. The relative efficiency of desaturase-mediated sulfoxidation was monitored via19F-NMR analysis of the sulfoxide products, and a strong preference for oxo transfer to the S-atom occupying the 9-position was confirmed. The oxidation profile obtained in this manner matched that of analogous experiments
制备一系列18-氟硫杂硬脂酸酯,并与酵母Δ9脱饱和系统一起孵育。通过亚砜产物的19 F-NMR分析监测去饱和酶介导的亚砜氧化的相对效率,并且证实了强烈希望将羰基转移至占据9位的S原子。以这种方式获得的氧化曲线与非氟化底物的类似实验相匹配。这些结果构成了一种通用的基于19 F-NMR的方法,可用于确定推定的二铁氧化剂相对于底物的位置,并在体外膜结合去饱和酶的研究中具有潜在的应用价值。