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We report the first example of 17O NMR spectra from a selectively labeled transmembrane peptide, 17O-[Ala12]-WALP23, as a lyophilized powder and incorporated in hydrated phospholipid vesicles. It is shown that at high magnetic field it is feasible to apply 17O NMR to the study of membrane-incorporated peptides. Furthermore, we were able to estimate distances within the selectively labeled WALP peptide, which represents a consensus transmembrane protein sequence. This work opens up new applications of 17O solid-state NMR on biological systems.

Original publication

DOI

10.1021/ja0473283

Type

Journal article

Journal

J Am Chem Soc

Publication Date

01/12/2004

Volume

126

Pages

15320 - 15321

Keywords

Cell Membrane, Membrane Proteins, Models, Molecular, Nuclear Magnetic Resonance, Biomolecular, Oxygen Isotopes, Peptides