Asymmetric C-Alkylation by the <i>S</i>
-Adenosylmethionine-Dependent Methyltransferase SgvM
作者:Christina Sommer-Kamann、Alexander Fries、Silja Mordhorst、Jennifer N. Andexer、Michael Müller
DOI:10.1002/anie.201609375
日期:2017.3.27
natural products and in epigenetic processes. MTs catalyze the methylation of heteroatoms and even of carbon atoms, which, in many cases, is a challenging reaction in conventional synthesis. However, C‐MTs are often highly substrate‐specific. Herein, we show that SgvM from Streptomyces griseoviridis features an extended substrate scope with respect to the nucleophile as well as the electrophile. Aside
S-腺苷甲硫氨酸依赖性甲基转移酶(MTs)在天然产物的生物合成和表观遗传过程中起决定性作用。MT催化杂原子甚至碳原子的甲基化,这在许多情况下是常规合成中的一项挑战性反应。但是,C‐MT通常是高度底物特异性的。在此,我们显示来自灰链霉菌的SgvM具有亲核试剂和亲电试剂的扩展底物范围。除了其生理底物4-甲基-2-氧代戊酸酯外,SgvM还在β-碳原子处催化丙酮酸,2-氧代丁酸酯,2-氧代戊酸酯和苯丙酮酸的(二)甲基化。手性HPLC分析显示2-氧戊酸的甲基化与R发生 选择性,而2-氧代丁酸酯与S-腺苷乙硫氨酸的乙基化会产生 3-甲基-2-氧代戊酸的S对映体。因此,SgvM可能是用于不对称生物催化C-烷基化反应的有价值的工具。