Heteronuclear single quantum coherence (HSQC) nuclear magnetic resonance (NMR) experiments offer a rapid and high resolution approach to gaining binding and conformational insights into a protein-peptide interaction. By tracking 1H and 15N chemical shift changes over the course of a peptide titration into isotopically labeled protein, amide NH pairs of amino acids whose chemical environment changes upon peptide binding can be identified. When mapped onto a structure of the protein, this approach can identify the peptide-binding interface or regions undergoing conformation changes within a protein upon ligand binding. Monitoring NMR chemical shift changes can also serve as a screening technique to identify novel interaction partners for a protein or to determine the binding affinity of a weak protein-peptide interaction. Here, we describe the application of NMR chemical shift mapping to the study of peptide binding to the C-terminal SH2 domain of PLCγ1.
CITATION STYLE
McKercher, M. A., & Wuttke, D. S. (2017). NMR chemical shift mapping of SH2 peptide interactions. In Methods in Molecular Biology (Vol. 1555, pp. 269–290). Humana Press Inc. https://doi.org/10.1007/978-1-4939-6762-9_15
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