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A carbon-13 nuclear magnetic resonance study of the cobalt (II)–Nicotinamide adenine dinucleotide complexes

✍ Scribed by Jean Torreilles; André Crastes De Paulet; Nicole Platzer

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
389 KB
Volume
9
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The addition of Co^2+^ to D~2~O solutions of Nicotinamide Adenine Dinucleotide induces modifications of the ^13^C n.m.r. signal line widths of these coenzymes. Analysis of the observed paramagnetic effects shows that both states (reduced and oxidized) and both conformations (folded or unfolded) of these coenzymes always allow two types of interactions between the cobalt ion and the nucleotide, namely where Co^2+^ is linked to the phosphate groups and to nitrogen‐7 of the adenine nucleus. Moreover, the metal ion also interacts with the adenine NH~2~ in the NAD^+^ folded conformation. These natural abundance ^13^C n.m.r. experiments allowed a fairly precise description of the Nicotinamide Adenine Dinucleotide—Co^2+^ interactions.

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