我们报告了开发H 2 O 2依赖性细胞色素P450BM3系统的独特策略,该系统可通过双功能小分子(DFSM),例如N-(ω-咪唑基)催化非天然底物的单加氧作用。脂肪酰基)l氨基酸。DFSM的氨基酸基团负责与酶结合成为锚定基团,而咪唑基在H 2 O 2活化中起一般酸碱催化剂的作用。该系统为那些P450–H 2 O 2中的苯乙烯的环氧化,硫代苯甲醚的硫氧化和乙苯的羟基化提供了最佳的过氧化酶活性。系统先前已报告。这项工作提供了通过引入外源性小分子激活正常H 2 O 2惰性P450的第一个例子。这种方法提高了P450在有机合成中的潜在用途,因为它避免了还原的烟酰胺辅因子NAD(P)H及其依赖的电子传输系统的昂贵消耗。这引入了在催化过程中基于直接化学干预来利用酶活性和功能的有前途的方法。
the 1.0% catalyst dosage along with 12.0 h. With the exception of the most optimal reaction conditions, generality, and recyclability of HCPImBr are also investigated. More importantly, the reaction mechanism is investigated by the density functional theory, which is the first time to report the mechanism for protic carboxyl imidazoliumionicliquids. The catalyticactivity of ionicliquids would be
Methods for detecting a target polynucleotide sequences are provided that utilize a probe having a target-complementary segment and a detectable tag. By cleaving the detectable tab and associating the tag with a tag complement coupled to an electrode, an electrochemical signal can be detected that is related to the presence of the tag:tag complement complex.
Development of imidazole alkanoic acids as mGAT3 selective GABA uptake inhibitors
作者:Silke Hack、Babette Wörlein、Georg Höfner、Jörg Pabel、Klaus T. Wanner
DOI:10.1016/j.ejmech.2011.01.042
日期:2011.5
inhibitors starting from of 1H-imidazol-4-ylacetic acid with the carboxylic acid side chain originating from different positions and varying in length have been synthesized and tested for the inhibitory potency at the four GABA uptake transporters mGAT1–4 stably expressed in HEK cells. Further two bicyclic compounds with a rigidified carboxylic acid side chain were included in this study. The results of the