title: Origin of the residual NMR linewidth of a peptide bound to a resin under magic angle spinning.
abstract: The tetrapeptide Ala-lle-Gly-Met bound to a Wang resin via the methionine residue was studied by NMR under MAS conditions and compared to the same peptide in solution. The bound peptide exhibits average linewidths superior to those observed for the peptide in solution. The origin of the residual NMR linewidth observed for the bound form was investigated. The dynamics of the peptide is shown to be only marginally responsible for the increased linewidth; the major cause of the line broadening appears to be nonaveraged magnetic susceptibility differences.
authors.affiliation: Institut de Chimie, UMR 7510 CNRS-Bruker, Strasbourg Cedex, F-67008, France.
authors.forename: K
authors.initials: K
authors.lastname: Elbayed
authors.forename: M
authors.initials: M
authors.lastname: Bourdonneau
authors.forename: J
authors.initials: J
authors.lastname: Furrer
authors.forename: T
authors.initials: T
authors.lastname: Richert
authors.forename: J
authors.initials: J
authors.lastname: Raya
authors.forename: J
authors.initials: J
authors.lastname: Hirschinger
authors.forename: M
authors.initials: M
authors.lastname: Piotto
mesh_terms: D016880:Anisotropy; D001665:Binding Sites; D002244:Carbon / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D008280:Magnetics; D015394:Molecular Structure; D010455:Peptides / Q000737:chemistry*; D011522:Protons; D012116:Resins, Plant / Q000737:chemistry*; D013113:Spin Labels
chemical_list: D010455:Peptides; D011522:Protons; D012116:Resins, Plant; D013113:Spin Labels; D002244:Carbon