Article
Spectroscopy and kinetics of wild-type and mutant tyrosine hydroxylase: mechanistic insight into O2 activation.
Journal of the American Chemical Society - 10 Jun 2009
Chow Marina S, Eser Bekir E, Wilson Samuel A, Hodgson Keith O, Hedman Britt, Fitzpatrick Paul F, Solomon Edward I
Abstract excerpt
Tyrosine hydroxylase (TH) is a pterin-dependent nonheme iron enzyme that catalyzes the hydroxylation of L-tyr to L-DOPA in the rate-limiting step of catecholamine neurotransmitter biosynthesis. We have previously shown that the Fe(II) site in phenylalanine hydroxylase (PAH) converts from six-coordinate (6C) to five-coordinate (5C) only when both substrate + cofactor are bound. However, steady-state kinetics...
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