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Updated: Aug 15, 2026

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
Published on: September 17, 2017
Probing membrane topology by high-resolution 1H-13C heteronuclear dipolar solid-state NMR spectroscopy
Jun-Xia Lu1, Krishnan Damodaran, Gary A Lorigan
1Department of Chemistry and Biochemistry, Miami University, Oxford, OH 45056, USA.
Abstract:
Membrane topology changes introduced by the association of biologically pertinent molecules with membranes were analyzed utilizing the (1)H-(13)C heteronuclear dipolar solid-state NMR spectroscopy technique (SAMMY) on magnetically aligned phospholipid bilayers (bicelles). The phospholipids (1)H-(13)C dipolar coupling profiles lipid motions at the headgroup, glycerol backbone, and the acyl chain region. The transmembrane segment of phospholamban, the antimicrobial peptide (KIGAKI)(3) and cholesterol were incorporated into the bicelles, respectively. The lipids (1)H-(13)C dipolar coupling profiles exhibit different shifts in the dipolar coupling contour positions upon the addition of these molecules, demonstrating a variety of interaction mechanisms exist between the biological molecules and the membranes. The membrane topology changes revealed by the SAMMY pulse sequence provide a complete screening method for analyzing how these biologically active molecules interact with the membrane.
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