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Updated: Jul 15, 2026

Method for Efficient Refolding and Purification of Chemoreceptor Ligand Binding Domain
Published on: December 12, 2017
Generation and relaxation of high rank coherences in AX3 systems in a selectively methionine labelled SH2 domain
Karin Kloiber1, Michael Fischer, Karin Ledolter
1Department of Biomolecular Structural Chemistry, Max F. Perutz Laboratories, University of Vienna, Campus Vienna Biocenter 5, Vienna, 1030, Austria. karin.kloiber@univie.ac.at
Abstract:
The usefulness of selective isotope labelling patterns is demonstrated using the C-terminal SH2 domain of PLC-gamma1 selectively 13C labelled at methionine methyl groups. We demonstrate the generation and relaxation of coherences that are second rank in protons and first rank in carbons that derive from quadrupolar order in protons. The decay rates of second rank double quantum proton coherences are measured. These terms exhibit fewer channels for cross-correlated relaxation compared to single quantum coherences. Our results indicate the potential application of the measurement of high order proton coherences to the analysis of dynamics in methyl-bearing side chains.
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