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Enzymes Involved in the Catalysis of Catecholamine Biosynthesis

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Research Methods in Neurochemistry

Abstract

The postulated biosynthetic pathway (Blaschko, 1939) for the formation of the adrenergic transmitters (Fig. 1) was the subject of several studies and was confirmed with the use of radioactive labeled precursors. Three enzymes are involved in the catalysis of norepinephrine biosynthesis: tyrosine hydroxylase (TH), dopa decarboxylase (DDC), and dopamines-hydroxylase (DβH; a fourth enzyme, namely, phenylethanolamine-N-methyltransferase (PNMT) catalyzes the biosynthesis of epinephrine from norepinephrine. Two enzymes, namely, TH and DβH, can be classified as mixed-function oxidase (Mason, 1957) or monooxygenase (Hayaishi, 1964). The general reaction catalyzed by monooxygenases is shown in Reaction (1) where RH stands for the substrate to be hydroxylated, ROH for the hydroxylated product, and XH2 for the electron donor.

Research Scientist Awardee of USPHS, NIH Grant MH-14918.

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© 1972 Plenum Press, New York

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Goldstein, M. (1972). Enzymes Involved in the Catalysis of Catecholamine Biosynthesis. In: Marks, N., Rodnight, R. (eds) Research Methods in Neurochemistry. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-7748-5_13

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  • DOI: https://doi.org/10.1007/978-1-4615-7748-5_13

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4615-7750-8

  • Online ISBN: 978-1-4615-7748-5

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