Mechanistic Studies of an IspH-Catalyzed Reaction: Implications for Substrate Binding and Protonation in the Biosynthesis of Isoprenoids
作者:Wei-chen Chang、Youli Xiao、Hung-wen Liu、Pinghua Liu
DOI:10.1002/anie.201104124
日期:2011.12.16
Chosen handle: Mechanistic studies of the IspH‐catalyzed reductive dehydroxylation of 4‐hydroxy‐3‐methyl‐2‐(E)‐1‐diphosphate (HMBPP) to isopentenyl diphosphate and dimethylallyl diphosphate suggest that both the 4‐OH group and the double bond of HMBPP may contribute to the formation of substrate–IspH complex. Labeling studies now show that the 4‐hydroxy group of the substrate plays the dominant role
选择的手柄:对 4-羟基-3-甲基-2-( E )-1-二磷酸 (HMBPP) 到异戊烯二磷酸和二甲基烯丙基二磷酸的 IspH 催化还原脱羟基的机理研究表明 4-OH 基团和双HMBPP 的键可能有助于底物-IspH 复合物的形成。标记研究现在表明,底物的 4-羟基在将底物定位在酶活性位点中起主导作用。