Active Site Models for the Cu<sub>A</sub>Site of Peptidylglycine α-Hydroxylating Monooxygenase and Dopamine β-Monooxygenase
作者:Atsushi Kunishita、Mehmed Z. Ertem、Yuri Okubo、Tetsuro Tano、Hideki Sugimoto、Kei Ohkubo、Nobutaka Fujieda、Shunichi Fukuzumi、Christopher J. Cramer、Shinobu Itoh
DOI:10.1021/ic301272h
日期:2012.9.3
A mononuclear copper(II) superoxo species has been invoked as the key reactive intermediate in aliphatic substrate hydroxylation by copper monooxygenases such as peptidylglycine α-hydroxylating monooxygenase (PHM), dopamine β-monooxygenase (DβM), and tyramine β-monooxygenase (TβM). We have recently developed a mononuclear copper(II) end-on superoxo complex using a N-[2-(2-pyridyl)ethyl]-1,5-diazacyclooctane
Mononuclearcopper(II)-superoxocomplexes 2(X)-OO(*) having triplet (S = 1) ground states were obtained via reaction of O(2) with the copper(I) starting materials 1(X) supported by tridentate ligands L(X) [1-(2-p-X-phenethyl)-5-(2-pyridin-2-ylethyl)-1,5-diazacyclooctane; X = CH(3), H, NO(2)] in various solvents. The superoxo complexes 2(X)-OO(*) mimic the structure [tetrahedral geometry with an end-on