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Oriented and unoriented M13 coat protein, incorporated into dimyristoyl phosphatidylcholine bilayers, has been studied by (13)C-magic angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy. Rotational resonance experiments provided two distance constraints between Calpha and C&z.dbnd6;O positions of the labelled residues Val-29/Val-30 (0.4+/-0.5nm) and Val-29/Val-31 (0.45+/-0. 5nm) in its hydrophobic domain. The derived dihedral angles (Phi, Psi) for Val-30 revealed a local alpha-helical conformation. (13)C-CP-MAS experiments on uniformly aligned samples (MAOSS experiments) using the (13)C&z.dbnd6;O labelled site of Val-30 allowed the determination of the helix tilt (20 degrees +/-10 degrees ) in the membrane. It is shown that one uniform MAS high-resolution solid state NMR approach can be used to obtain structural and orientational data.

Type

Journal article

Journal

Biochim Biophys Acta

Publication Date

15/01/2000

Volume

1463

Pages

151 - 161

Keywords

Amino Acid Sequence, Bacteriophage M13, Capsid, Capsid Proteins, Magnetic Resonance Spectroscopy, Membrane Proteins, Models, Molecular, Molecular Sequence Data, Protein Structure, Tertiary