Stereospecificity of hydride transfer for the catalytically recycled NAD+ in CDP-d-glucose 4,6-dehydratase
作者:Tina M. Hallis、Hung-wen Liu
DOI:10.1016/s0040-4020(98)01005-9
日期:1998.12
CDP-D-glucose 4,6-dehydratase (Eod), found in the biosynthetic pathway of 3,6-dideoxysugars, contains a tightly bound NAD+ that is recycled during catalysis. The stereochemical preference of the hydride transfer to and from the coenzyme in Eod was determined to be pro-S by analyzing the NAD+ produced when the apoenzyme was incubated with stereospecifically labeled NADH and its product, CDP-6-deoxy-D-gl
在3,6-脱氧糖的生物合成途径中发现的CDP-D-葡萄糖4,6-脱水酶(E od)含有紧密结合的NAD +,可在催化过程中循环使用。通过分析脱辅酶与立体特异性标记的NADH及其产物CDP-6-脱氧-D-甘油一起孵育时产生的NAD +,可以确定氢化物在E od中与辅酶之间的转移的立体化学偏好为pro-S。-L-苏式-4-己糖。