title: Structure of a protein determined by solid-state magic-angle-spinning NMR spectroscopy.
abstract: The determination of a representative set of protein structures is a chief aim in structural genomics. Solid-state NMR may have a crucial role in structural investigations of those proteins that do not easily form crystals or are not accessible to solution NMR, such as amyloid systems or membrane proteins. Here we present a protein structure determined by solid-state magic-angle-spinning (MAS) NMR. Almost complete (13)C and (15)N resonance assignments for a micro-crystalline preparation of the alpha-spectrin Src-homology 3 (SH3) domain formed the basis for the extraction of a set of distance restraints. These restraints were derived from proton-driven spin diffusion (PDSD) spectra of biosynthetically site-directed, labelled samples obtained from bacteria grown using [1,3-(13)C]glycerol or [2-(13)C]glycerol as carbon sources. This allowed the observation of long-range distance correlations up to approximately 7 A. The calculated global fold of the alpha-spectrin SH3 domain is based on 286 inter-residue (13)C-(13)C and six (15)N-(15)N restraints, all self-consistently obtained by solid-state MAS NMR. This MAS NMR procedure should be widely applicable to small membrane proteins that can be expressed in bacteria.
authors.affiliation: Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Strasse 10, 13125 Berlin, Germany.
authors.forename: Federica
authors.initials: F
authors.lastname: Castellani
authors.forename: Barth
authors.initials: B
authors.lastname: van Rossum
authors.forename: Annette
authors.initials: A
authors.lastname: Diehl
authors.forename: Mario
authors.initials: M
authors.lastname: Schubert
authors.forename: Kristina
authors.initials: K
authors.lastname: Rehbein
authors.forename: Hartmut
authors.initials: H
authors.lastname: Oschkinat
mesh_terms: D000818:Animals; D001921:Brain; D002645:Chickens; D004058:Diffusion; D005990:Glycerol; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008958:Models, Molecular; D011487:Protein Conformation; D011522:Protons; D013049:Spectrin / Q000737:chemistry*; D013113:Spin Labels; D018909:src Homology Domains
chemical_list: D011522:Protons; D013113:Spin Labels; D013049:Spectrin; D005990:Glycerol