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XB-ART-24721
J Biomol NMR 1991 Jul 01;12:167-73. doi: 10.1007/bf01877228.
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Orientations of amphipathic helical peptides in membrane bilayers determined by solid-state NMR spectroscopy.

Bechinger B , Kim Y , Chirlian LE , Gesell J , Neumann JM , Montal M , Tomich J , Zasloff M , Opella SJ .


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Solid-state NMR spectroscopy was used to determine the orientations of two amphipathic helical peptides associated with lipid bilayers. A single spectral parameter provides sufficient orientational information for these peptides, which are known, from other methods, to be helical. The orientations of the peptides were determined using the 15N chemical shift observed for specifically labeled peptide sites. Magainin, an antibiotic peptide from frog skin, was found to lie in the plane of the bilayer. M2 delta, a helical segment of the nicotinic acetylcholine receptor, was found to span the membrane, perpendicular to the plane of the bilayer. These findings have important implications for the mechanisms of biological functions of these peptides.

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Species referenced: Xenopus
Genes referenced: magainins

References [+] :
Braun, Conformation of glucagon in a lipid-water interphase by 1H nuclear magnetic resonance. 1983, Pubmed