Stereochemical Analysis of Isopentenyl Diphosphate Isomerase Type II from <i>Staphylococcus </i><i>a</i><i>ureus</i> Using Chemically Synthesized (<i>S</i>)- and (<i>R</i>)-[2-<sup>2</sup>H]Isopentenyl Diphosphates
作者:Chai-lin Kao、William Kittleman、Hua Zhang、Haruo Seto、Hung-wen Liu
DOI:10.1021/ol0524050
日期:2005.12.1
the catalysis of isopentenyl diphosphate (IPP) isomerase type II from Staphylococcus aureus, which is a flavoprotein catalyzing the interconversion of IPP and dimethylallyl diphosphate, we have chemically synthesized (S)- and (R)-[2-2H]IPP and carried out stereochemical analysis of the reaction. Our results show that the C-2 deprotonation of IPP by this enzyme is pro-R stereospecific, suggesting a similar
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