Stereochemistry of the Reduction Step Mediated by Recombinant 1-Deoxy-<scp>d</scp>-xylulose 5-Phosphate Isomeroreductase
作者:Philip J. Proteau、Youn-Hi Woo、R. Thomas Williamson、Chanokporn Phaosiri
DOI:10.1021/ol990839n
日期:1999.9.1
[GRAPHICS]The stereochemistry of the 1-deoxy-D-xylulose 5-phosphate (DXP) isomeroreductase reduction step has been examined using the recombinant enzyme from Synechocystis sp. PCC6803, Using [3-H-2]DXP and [4S-H-2]NADPH, it has been determined that the C1 pro-S hydrogen in the 2-C-methyl-D-erythritol 4-phosphate product derives from C3 of DXP, indicating that hydride attack occurs on the re face of the intermediate aldehyde, The 4S-hydride from NADPH is delivered, assigning this enzyme as a class B dehydrogenase.