3D NOESY-TOCSY-HSQC and TOCSY-NOESY-HSQC NMR experiments
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Revision as of 18:16, 27 January 2009
Magnetization pathway (TOCSY-NOESY-HSQC): H (ω1) -- TOCSY --> ... -- NOE --> H15N -- inept --> H15N (ω2) -- inept --> H (ω3)15N
In NOESY-TOCSY-HSQC NOESY and TOCSY mixing periods are interchanged.
Both experiments are said to work best in extended β-sheet protein folds, where there is strong HN-CHα vicinal coupling. The two experiments differ in directioinality of correlations. The cited [1] advantage over 3D NOESY-HSQC is presence of sequential HN-HN NOE's for β-sheet proteins.
References
- MUELLER, L and CAMPBELL-BURK, S and DOMAILLE, P. 15N-correlated three-dimensional relayed NOESY experiments in uniformly 15N-labeled proteins. Journal of magnetic resonance 96(2):408--415, 1992. BibTeX
