Chemoenzymatic synthesis of 4-diphosphocytidyl-2-C-methyl-d-erythritol: a substrate for IspE
作者:Prabagaran Narayanasamy、Hyungjin Eoh、Dean C. Crick
DOI:10.1016/j.tetlet.2008.05.074
日期:2008.7
Enantiomerically pure 2-C-methyl-D-erythritol 4-phosphate 1 (MEP) is synthesized from 1,2-O-isopropylidene-alpha-D-xylofuranose via facile benzylation in good yield. Subsequently, 1 is used for enzymatic synthesis of 4-diphosphocytidyl-2-C-methyl-D-erythritol 2 (CDP-ME) using 4-diphosphocytidyl-2-Cmethyl-D-erythritol synthase (IspD). The chemoenzymatically synthesized 2 can be used as substrate for assay of IspE and for high throughput screening to identify 1spE inhibitors. (c) 2008 Elsevier Ltd. All rights reserved.
Expression and Characterization of Soluble 4-Diphosphocytidyl-2-C-methyl-D-erythritol Kinase from Bacterial Pathogens
作者:Hyungjin Eoh、Prabagaran Narayanasamy、Amanda C. Brown、Tanya Parish、Patrick J. Brennan、Dean C. Crick
DOI:10.1016/j.chembiol.2009.10.014
日期:2009.12
Many bacterial pathogens utilize the 2-C-methyl-D-erythritol 4-phosphate pathway for biosynthesizing isoprenoid precursors, a pathway that is vital for bacterial survival and absent from human cells, providing a potential source of drug targets. However, the characterization of 4-diphosphocytidyl-2-C-methyl-D-erythritol (CDP-ME) kinase (IspE) has been hindered due to a lack of enantiopure CDP-ME and difficulty in obtaining pure IspE. Here, enantiopure CDP-ME was chemically synthesized and recombinant IspE from bacterial pathogens were purified and characterized. Although gene disruption was not possible in Mycobacterium tuberculosis, IspE is essential in Mycobacterium smegmatis. The biochemical and kinetic characteristics of IspE provide the basis for development of a high throughput screen and structural characterization.
Chemical Synthesis of Enantiopure 2-C-Methyl-d-Erythritol 4-Phosphate, the Key Intermediate in the Mevalonate-Independent Pathway for Isoprenoid Biosynthesis
Optically pure 2-C-methyl-d-erythritol 4-phosphate, a keyintermediate in the mevalonate-independent route for isoprenoid biosynthesis, is conveniently synthesized from 1,2-O-isopropylidene-α-d-xylofuranose, including the possibility of radiolabeling of this substrate.