Add time:07/28/2019         Source:sciencedirect.com

The vinylogue of NAD, 3-pyridylacryloamide adenine dinucleotide, was prepared from NAD and 3-pyridylacryloamide through the snake venom NADase-catalyzed transglycosidation reaction. The analog, purified by ion-exchange chromatography, was obtained in a 55% yield. The cyanide adduct and reduced form of the analog exhibited absorbance maxima at 358 nm and 378 nm, respectively, with extinction coefficients in each case being 2.3-times higher than those reported for the corresponding NAD derivatives. 3-Pyridylacryloamide adenine dinucleotide served as a coenzyme with bovine liver glutamic dehydrogenase and to a lesser extent with malate and lactate dehydrogenases. The analog was not reduced in reactions catalyzed by yeast and horse liver alcohol dehydrogenases, sheep liver sorbitol dehydrogenase, and rabbit muscle glycerophosphate dehydrogenase. Substitution of the pyridylacryloamide analogs for NAD and NADH in the assay of substrates for glutamic dehydrogenase was demonstrated.

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