A structural study of peptides and proteins containing l-alanine residues by 13C NMR spectroscopy combined with ab initio chemical shift calculations
作者:Naoki Asakawa、Hiromichi Kurosu、Isao Ando、Akira Shoji、Takuo Ozaki
DOI:10.1016/0022-2860(93)07864-s
日期:1994.1
Abstract From the observation of solid-state 13C NMR chemical shifts of l -alanine residues which are contained in some peptides, and the 13C chemical shift calculations employing the coupled-Hartree—Fock method with gauge-invariant-atomic-orbital, it was found that the 13C chemical shift of the Cβ-carbon in the l -alanine residue is related to the main-chain dihedral angles, φψ, but that of the Cα-carbon
摘要 通过观察某些肽中含有的 l-丙氨酸残基的固态 13C NMR 化学位移,以及采用耦合-Hartree-Fock 方法和规范不变原子轨道的 13C 化学位移计算,发现L-丙氨酸残基中 Cβ-碳的 13C 化学位移与主链二面角 φψ 有关,但 Cα-碳的化学位移不仅受二面角的影响,还受氢键结构的影响。这些结果已成功应用于溶液中蛋白质、来自大肠杆菌的核糖核酸酶 H 和碱性胰蛋白酶抑制剂的结构研究。