Synthesis of arabinitol 1-phosphate and its use for characterization of arabinitol–phosphate dehydrogenase
摘要:
D-Arabinitol 1-phosphate (Ara-oll-P), a substrate for D-arabinitol-phosphate dehydrogenase (APDH), was chemically synthesized from D-arabinonic acid in five steps (O-acetylation, chlorination, reduction, phosphorylation, and de-O-acetylation). Ara-oll-P was used as a substrate for the characterization of APDH from Bacillus halodurans. APDH converts Ara-oll-P to xylulose 5-phosphate in the oxidative reaction; both NAD(+) and NADP(+) were accepted as co-factors. Kinetic parameters for the oxidative and reductive reactions are consistent with a ternary complex mechanism. (c) 2004 Elsevier Ltd. All rights reserved.
The chemicalsynthesis of ketopentose-5-phosphates that are involved in the pentose phosphate pathway is developed. The ketopentose phosphates, D-ribulose-5-phosphate and D-xylulose-5-phosphate, were prepared in five steps starting from known intermediates. Starting from readily available D-aldopentoses, the reduction of the corresponding furanose derivatives gave key intermediates in the form of aldopentitols
domain. The cofactor and substrate binding sites of human TKT bear high resemblance to those of other TKTs but also feature unique properties, including two lysines and a serine that interact with the beta-phosphate of ThDP. Furthermore, Gln(189) spans over the thiazolium moiety of ThDP and replaces an isoleucine found in most non-mammalian TKTs. The side chain of Gln(428) forms a hydrogen bond with
Reversible and in situ formation of organic arsenates and vanadates as organic phosphate mimics in enzymatic reactions: mechanistic investigation of aldol reactions and synthetic applications
作者:Dale G. Drueckhammer、J. Robert Durrwachter、Richard L. Pederson、Debbie C. Crans、Lacy Daniels、Chi Huey Wong
DOI:10.1021/jo00262a021
日期:1989.1
Utilization of enzymes in organic chemistry: Transketolase catalyzed synthesis of ketoses
作者:Jean Bolte、Colette Demuynck、Hamid Samaki
DOI:10.1016/s0040-4039(00)96770-4
日期:1987.1
Practical synthesis of 5-phospho-D-ribosyl .alpha.-1-pyrophosphate (PRPP): enzymatic routes from ribose 5-phosphate or ribose
作者:Akiva Gross、Obsidiana Abril、Jerome M. Lewis、Shimona Geresh、George M. Whitesides