Departments of Chemistry, Biochemistry and The Rosenstiel Institute for Basic Medical Research, Brandeis University, 415 South St., Waltham, MA 02454, USA.
Curr Opin Biotechnol. 2021 Jun;69:35-42. doi: 10.1016/j.copbio.2020.11.007. Epub 2020 Dec 22.
Many economically important biosyntheses incorporate regiospecific and stereospecific oxidations at unactivated carbons. Such oxidations are commonly catalyzed by cytochrome P450 monooxygenases, heme-containing enzymes that activate molecular oxygen while selectively binding and orienting the substrate for reaction. Despite the plethora of P450-catalyzed reactions, the P450 fold is highly conserved, and static structures are often insufficient for characterizing conformational states that contribute to specificity. High-resolution solution nuclear magnetic resonance (NMR) offers insights into dynamic processes and conformational changes that are required of a P450 in order to attain the combination of specificity and efficiency required for these reactions.
许多具有重要经济价值的生物合成过程都包含在非活性碳上进行的区域和立体选择性氧化。这种氧化通常由细胞色素 P450 单加氧酶催化,该酶含有血红素,可在选择性结合和定向反应底物的同时激活分子氧。尽管 P450 催化的反应很多,但 P450 折叠结构高度保守,静态结构通常不足以描述对特异性有贡献的构象状态。高分辨率溶液核磁共振(NMR)可深入了解 P450 为达到这些反应所需的特异性和效率的结合而进行的动态过程和构象变化。