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Degradation of nicotinamide adenine dinucleotide in cell suspension cultures
Authors:Heiner Neuhann  Karl-Wilhelm Leienbach  Wolfgang Barz
Affiliation:Lehrstuhl für Biochemie der Pflanzen der Universität, 4400 Münster, W. Germany
Abstract:Metabolites of [carbonyl-14C]-NAD in cell suspension cultures of mung bean, soybean and garbanzo bean are trigonelline and compounds of the pyridine nucleotide cycle. Degradation of nicotinate does not occur. In parsley cell cultures nicotinate degradation and formation of nicotinic acid N-α-l-arabinoside were observed. These conjugates are alternative reservoir forms of nicotinic acid. The adenine moiety of NAD is degraded in cell cultures via hypoxanthine-xanthine-allantoin-allantoic acid, with accumulation of the latter two compounds.
Keywords:Leguminosae  Umbelliferae  cell suspension cultures  catabolism  NAD  trigonelline  adenine  allantoin.
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