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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Human intestinal diamine oxidase: substrate specificity and comparative inhibitor study.

For an 80-fold purified preparation of human intestinal diamine oxidase the optimum conditions of incubation, the substrate and the inhibitor specificity were tested. Putrescine was the most favoured substrate but N tau-methylhistamine and 2-methylhistamine were metabolized at optimum conditions with nearly the same velocity. Histamine reached about 50% of the reaction velocity of putrescine. Aminoguanidine and semicarbazide inhibited the human intestinal enzyme like a classical diamine oxidase. However, a distinct inhibition of human intestinal and pea seedling diamine oxidase was observed in presence of beta-aminopropionitrile (weak inhibition of the human enzyme, strong inhibition of pea seedling diamine oxidase) and burimamide (strong inhibition of human intestinal enzyme, nearly no influence on pea seedling diamine oxidase). It is proposed to differentiate on the basis of functional considerations diamine oxidases with more histamine detoxicating activities from those being more involved in regulating polyamine levels in growing tissues.[1]

References

  1. Human intestinal diamine oxidase: substrate specificity and comparative inhibitor study. Biegański, T., Kusche, J., Feussner, K.D., Hesterberg, R., Richter, H., Lorenz, W. Agents Actions (1980) [Pubmed]
 
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