Unnatural paramagnetic α-amino acids with 2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-1-yloxyl-3-yl radical or 2,5,5-trimethylpyrrolidin-1-yloxyl-2-yl radical side-chains, including a lysine mimic azido precursor and their derivatives, are described. The new set of paramagnetic amino acids presented in this work with different (polar, nonpolar, aliphatic, aromatic, etc.) side-chains offers a useful tool for the ESR study of the protein structure and function after incorporation, fulfilling diverse structural requirements.
本文描述了一系列非天然顺磁性
α-氨基酸,其侧链为2,2,5,5-四甲基-2,5-二氢-1H-
吡咯-1-氧基-3-基自由基或2,5,5-三甲基
吡咯啉-1-氧基-2-基自由基,包括一种赖
氨酸类似物的
叠氮前体及其衍
生物。本工作介绍的这一新型顺磁性
氨基酸系列,具有不同(极性、非极性、脂肪族、芳香族等)侧链,为蛋白质结构和功能掺入后的ESR研究提供了有用的工具,满足了多样化的结构需求。