Abstract
Determination of protein structure and dynamics is key to understand the mechanism of protein action. Perdeuterated proteins have been used to obtain high resolution/sensitivty NMR experiments via proton-detection. These methods utilizes 1H, 13C and 15N nuclei for chemical shift dispersion or relaxation probes, despite the existing abundant deuterons. However, a high-sensitivity NMR method to utilize deuterons and e.g. determine site-specific deuterium quadrupolar pattern information has been lacking due to technical difficulties associated with deuterium’s large quadrupolar couplings. Here, we present a novel deuterium-excited and proton-detected three-dimensional 2H–13C–1H MAS NMR experiment to utilize deuterons and to obtain site-specific methyl 2H quadrupolar patterns on detuterated proteins for the first time. A high-resolution fingerprint 1H–15N HSQC-spectrum is correlated with the anisotropic deuterium quadrupolar tensor in the third dimension. Results from a model perdeuterated protein has been shown.
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Akbey, Ü. Site-specific protein methyl deuterium quadrupolar patterns by proton-detected 3D 2H–13C–1H MAS NMR spectroscopy. J Biomol NMR 76, 23–28 (2022). https://doi.org/10.1007/s10858-021-00388-4
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DOI: https://doi.org/10.1007/s10858-021-00388-4