title: Access to Cα backbone dynamics of biological solids by 13C T1 relaxation and molecular dynamics simulation.
abstract: We introduce a labeling scheme for magic angle spinning (MAS) solid-state NMR that is based on deuteration in combination with dilution of the carbon spin system. The labeling strategy achieves spectral editing by simplification of the HαCα and aliphatic side chain spectral region. A reduction in both proton and carbon spin density in combination with fast spinning (≥50 kHz) is essential to retrieve artifact-free (13)C-R1 relaxation data for aliphatic carbons. We obtain good agreement between the NMR experimental data and order parameters extracted from a molecular dynamics (MD) trajectory, which indicates that carbon based relaxation parameters can yield complementary information on protein backbone as well as side chain dynamics.
authors.affiliation: Munich Center for Integrated Protein Science (CIPSM) at Department of Chemie, Technische Universität München (TUM) , Lichtenbergstr. 4, D-85747 Garching, Germany.
authors.forename: Sam
authors.initials: S
authors.lastname: Asami
authors.forename: Justin R
authors.initials: JR
authors.lastname: Porter
authors.forename: Oliver F
authors.initials: OF
authors.lastname: Lange
authors.forename: Bernd
authors.initials: B
authors.lastname: Reif
mesh_terms: D000818:Animals; D002247:Carbon Isotopes; D002645:Chickens; D009682:Magnetic Resonance Spectroscopy; D056004:Molecular Dynamics Simulation; D013049:Spectrin / Q000737:chemistry*
chemical_list: D002247:Carbon Isotopes; D013049:Spectrin