Abstract
A comparison has been performed of catalytic properties of unicellular microorganism amine oxidases (AO) from two new enzyme sources, the bacteriumMethanosarcina barkeri and the infusoriaTetrahymena pyriformis. It was shown that the both studied AO deaminate tyramine, serotonin, and benzylamine, but do not deaminate histamine. The AO fromMethanosarcina barkeri catalyzes deamination of all three substrates at an identical rate, while the rate of tyramine deamination under effect of AO fromTetrahymena pyriformis is one order higher than the rate of serotonin deamination, and about two orders higher than the rate of benzylamine deamination. Based on the data of the substrate-inhibitor analysis, a suggestion was made about the existence of one center for the substrate binding in the AO of the studied bacterium, while several centers in the AO of the studied infusoria.
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Yagodina, O.V., Nikol’skaya, E.B., Shemarova, I.Y. et al. Amine oxidase in unicellular microorganismsMethanosarcina barkeri andTetrahymena pyriformis . J Evol Biochem Phys 36, 244–248 (2000). https://doi.org/10.1007/BF02737038
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DOI: https://doi.org/10.1007/BF02737038