期刊
JOURNAL OF MAGNETIC RESONANCE
卷 297, 期 -, 页码 152-160出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmr.2018.10.015
关键词
Protein structure; Peptide bond conformation; Tensor correlation; Magic-angle spinning solid-state NMR
资金
- National Science Foundation [MCB-1243461, MCB-1715174]
- National Institutes of Health [R01GM094357, R01GM118664, R01GM123743]
- Camille & Henry Dreyfus Foundation (Camille Dreyfus Teacher-Scholar Award)
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM094357, R01GM123743, R01GM118664] Funding Source: NIH RePORTER
Multidimensional magic-angle spinning solid-state NMR experiments are described that permit cis and trans peptide bonds in uniformly C-13,N-15-labeled peptides and proteins to be unambiguously distinguished in residue-specific manner by determining the relative orientations of the amide C-13' CSA and H-1-N-15 dipolar coupling tensors. The experiments are demonstrated for model peptides glycylglycine and 2,5-diketopiperazine containing trans and cis peptide bonds, respectively. Subsequently, the measurements are extended to two representative proteins that contain exclusively trans peptide bonds, microcrystalline B3 immunoglobulin domain of protein G and Y145Stop human priori protein amyloid fibrils, to illustrate their applicability to a wide range of protein systems. (C) 2018 Elsevier Inc. All rights reserved.
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