期刊
JOURNAL OF BIOLOGICAL CHEMISTRY
卷 280, 期 6, 页码 4627-4631出版社
AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
DOI: 10.1074/jbc.M410596200
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We present spectroscopic evidence consistent with the presence of a stable tyrosyl radical in partially reduced human monoamine oxidase (MAO) A. The radical forms following single electron donation to MAO A and exists in equilibrium with the FAD flavosemiquinone. Oxidative formation of the tyrosyl radical in MAO is not reliant on neighboring metal centers and uniquely requires reduction of the active site flavin to facilitate oxidation of a tyrosyl side chain. The identified tyrosyl radical provides the key missing link in support of the single electron transfer mechanism for amine oxidation by MAO enzymes.
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