title: Extensive 1H NMR resonance assignment of proteins using natural abundance gradient-enhanced 13C-1H correlation spectroscopy.
abstract: The reliability and completeness of 1H NMR resonance assignment can be improved by the use of 13C-1H HSQC correlation spectra on unlabelled protein samples using pulsed field gradients. This technique is illustrated on a 5.2 mM sample of the 79 residue Desulfovibrio vulgaris ferrocytochrome c553. Protons attached to the same carbon can be unambiguously paired in a HSQC spectrum. Contrary to 1H, most amino acids exhibit characteristic 13C chemical shift ranges, which can be used for 13C assignment. This technique is especially useful for long side chain residues, such as Gln, Glu, Lys, Arg.
authors.affiliation: Laboratoire de Résonance Magnétique Nucléaire, Institut de Biologie Structurale, CNRS-CEA, Grenoble, France.
authors.forename: S
authors.initials: S
authors.lastname: Medvedeva
authors.forename: J P
authors.initials: JP
authors.lastname: Simorre
authors.forename: B
authors.initials: B
authors.lastname: Brutscher
authors.forename: F
authors.initials: F
authors.lastname: Guerlesquin
authors.forename: D
authors.initials: D
authors.lastname: Marion
mesh_terms: D000595:Amino Acid Sequence; D002247:Carbon Isotopes; D003574:Cytochrome c Group / Q000737:chemistry*; D016969:Desulfovibrio vulgaris / Q000378:metabolism; D006859:Hydrogen; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008969:Molecular Sequence Data; D011487:Protein Conformation; D011506:Proteins / Q000737:chemistry*
chemical_list: D002247:Carbon Isotopes; D003574:Cytochrome c Group; D011506:Proteins; C083951:cytochrome c553; D006859:Hydrogen