Iron(III)−Catecholato Complexes as Structural and Functional Models of the Intradiol-Cleaving Catechol Dioxygenases
作者:Pieter C. A. Bruijnincx、Martin Lutz、Anthony L. Spek、Wilfred R. Hagen、Gerard van Koten、Robertus J. M. Klein Gebbink
DOI:10.1021/ic700741v
日期:2007.10.1
tetrachlorocatechol) in the solid state, the complex constitutes the closest structural model reported to date. The iron(III)-catecholato complexes mimic both the structural features of the active site and its spectroscopic characteristics. As part of its spectroscopic characterization, the electron paramagnetic resonance (EPR) spectra were successfully simulated using a simple model that accounts for D strain. The
描述了配体L4(甲基双(1-甲基咪唑-2-基)(2-羟苯基)甲基醚,HL4)的单核铁(III)-邻苯二酚络合物的结构和光谱表征内二醇切割的儿茶酚双加氧酶。L4的三齿三脚架单阴离子配体框架包含一个酚基和两个咪唑供体基团,因此可以很好地复制His2Tyr内源性供体组。实际上,对于固态的[FeIII(L4)(tcc)(H2O)](5.H2O,tcc =四氯邻苯二酚)的结构特征,该配合物构成了迄今为止报道的最接近的结构模型。铁(III)-邻苯二酚络合物模拟了活性位点的结构特征及其光谱特征。作为光谱表征的一部分,使用解释D应变的简单模型成功地模拟了电子顺磁共振(EPR)光谱。模拟过程表明,观察到的g = 4.3谱线是所研究复合物的EPR包络的内在部分,不一定应归因于高度菱形杂质。研究了[FeIII(L4)(dtbc)(H2O)](dtbc = 3,5-二叔丁基邻苯二酚)的双氧反应性,并观察到底物的氧