The two C-4 protons of reduced nicotinamide adenine dinucleotide (NADH) produce an AB NMR spectrum at 100 MHz as well as at 220 MHz. This observation allows an upper limit of 50 sec-l to be placed on the mean rate of interconversion of the two folded forms of NADH invoked to account for the magnetic
15N nuclear magnetic resonance studies of [1-15N]nicotinamide adenine dinucleotides
✍ Scribed by Norman J. Oppenheimer; Robert M. Davidson
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 327 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The synthesis of [1‐^15^N]nicotinamide adenine dinucleotide is described. Chemical shift data from ^15^N NMR studies are presented for the pyridine ring nitrogen of labeled NAD and related compounds. The results indicate a ^15^N label in the N‐1 position to be highly sensitive to the redox‐state of the pyridine moiety, with an upfield shift of over 100 ppm observed upon reduction of NAD^+^ to NADH. The feasibility of conducting ^15^N NMR studies of pyridine nucleotide binding to dehydrogenases is discussed.
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