The present invention provides a stable isotope-labeled amino acid which is at least one of amino acids constituting a protein and which has at least one of the following labeling patterns: (a) hydrogen atoms except at least one hydrogen atom in one or more methylene groups are deuterated, (b) hydrogen atoms in one of prochiral gem-methyl groups are completely deuterated, (c) hydrogen atoms in prochiral methyl groups are partially deuterated, and (d) all hydrogen atoms except one of them in methyl group are deuterated and hydrogen atoms in the aromatic ring are partially deuterated. With the stable isotope-labeled amino acid, the deuteration of protein can be attained without damaging the NMR sensitivity of remaining hydrogen nucleus and, in addition, the rapid, accurate analysis of NMR spectrum of a high-molecular protein which is beyond the limitation in the prior art and the determination of the stereo-structure can be performed at the same time.
本发明提供了一种稳定的同位素标记
氨基酸,它是构成蛋白质的
氨基酸中的至少一种,并具有下列标记模式中的至少一种:(a) 除一个或多个亚甲基中的至少一个氢原子外,其他氢原子均被氚化;(b) 亲手性 gem-methyl 基团中的一个氢原子完全被氚化;(c) 亲手性甲基中的氢原子部分被氚化;(d) 除甲基中的一个氢原子外,其他所有氢原子均被氚化,芳香环中的氢原子部分被氚化。有了这种稳定的同位素标记
氨基酸,就可以在不损害剩余氢核的核磁共振灵敏度的情况下实现蛋白质的
氘化,此外,还可以同时对高分子蛋白质的核磁共振谱进行快速、准确的分析,这超出了现有技术的限制,而且还可以同时确定立体结构。