1H-1H MAS correlation spectroscopy and distance measurements in a deuterated peptide

被引:133
作者
Reif, B
Jaroniec, CP
Rienstra, CM
Hohwy, M
Griffin, RG [1 ]
机构
[1] MIT, Dept Chem, Cambridge, MA 02139 USA
[2] MIT, MIT Harvard Ctr Magnet Resonance, Francis Bitter Natl Magnet Lab, Cambridge, MA 02139 USA
关键词
D O I
10.1006/jmre.2001.2354
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
In this Communication, we demonstrate the use of deuteration together with back substitution of exchangeable protons as a means of attenuating the strong H-1-H-1 couplings that broaden H-1 magic angle spinning (MAS) spectra of solids. The approach facilitates N-15-H-1 correlation experiments as well as experiments for the measurement of H-1-H-1 distances. The distance measurement relies on the excellent resolution in the H-1 MAS spectrum and homonuclear double quantum recoupling techniques. The H-1-H-1 dipolar recoupling can be analyzed in an analytical fashion by fitting the data to a 2- or 3-spin system. The experiments are performed on a sample of the dipeptide N-Ac-Val-Leu-OH, which was synthesized from uniformly [H-2, N-15] labeled materials and back-exchanged in H2O. (C) 2001 Academic Press.
引用
收藏
页码:320 / 327
页数:8
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