Analyzing the redox products of 7 with glutathione (GSH) and tBuOOH, we identified three potential catalytic cycles (A, B, C) of GPx-like activity that are interconnected by key metabolites. To study the relative contribution of these cycles to the catalytic activity, we prepared selected reaction intermediates and found that the activity of seleninicacidanhydride 7 and of the corresponding diselenide
Hydrophobicity and glutathione peroxidase-like activity of substituted salicyloyl-5-seleninic acids: Re-investigations on aromatic selenium compounds based on their hydrophobicity
作者:Sun-Chol Yu、Dong-Myong Ri、Hartmut Kühn
DOI:10.1016/j.jorganchem.2018.02.045
日期:2018.5
salicylic acid derivatives exhibit glutathioneperoxidase (GPx)-like activities higher than or equal to ebselen [Yu et al., Chem. Eur. J., 2008, 14, 7066; Org. Biomol. Chem., 2010, 8, 828]. For understanding the absence of GPx-like activity of the homologue of 5-seleninic anhydride of salicyloylglycine with a loger side chain, we have further synthesized 19 new derivatives (5-seleninic acids of methyl
先前我们已经表明,一些5-硒化水杨酸衍生物表现出的谷胱甘肽过氧化物酶(GPx)样活性高于或等于依伯硒仑[Yu et al。,Chem。欧元。J.,2008,14,7066; 单位 生物分子 化学 ,2010,8,828]。为了解不存在具有loger侧链的水杨酰甘氨酸5-硒酸酐的同系物没有GPx样活性的情况,我们进一步合成了19种新衍生物(甲基或苯基水杨酸酯的5-硒酸,N-水杨酰ω-羧烷基胺或ñ-水杨酰基烷基/苯基胺,及其一些二硒化物)。某些带有长侧链或环己基的5-硒酸,无论其衍生自ω-羧烷基胺还是简单的烷基胺,都没有GPx样的活性。缺乏类似GPx的活性,使我们可以定量地将上述3个系列同源物的GPx活性与其疏水性(ClogP)相关联,在每个系列中均显示出令人满意的相关性。然后将分子疏水性广泛应用于包括二芳基二硒化物和依布硒仑衍生物在内的各种已知的芳香族硒GPx模拟物,以相对定量的方式解释其G