2M4J

40-residue beta-amyloid fibril derived from Alzheimer's disease brain

SOLID-STATE NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 13C-13C with fpRFDR	1-2 mg selectively and uniformly labeled samples beta-amyloid peptide	none	10	7.4	ambient	288
2	2D and 3D NCACX	1-2 mg selectively and uniformly labeled samples beta-amyloid peptide	none	10	7.4	ambient	288
3	2D NCOCX	1-2 mg selectively and uniformly labeled samples beta-amyloid peptide	none	10	7.4	ambient	288
4	3D NCOCX	1-2 mg selectively and uniformly labeled samples beta-amyloid peptide	none	10	7.4	ambient	288
5	2D NCACX	1-2 mg selectively and uniformly labeled samples beta-amyloid peptide	none	10	7.4	ambient	288
6	2D 13C-13C with spin diffusion	1-2 mg selectively and uniformly labeled samples beta-amyloid peptide	none	10	7.4	ambient	288
7	2D 13C-13C with RAD	1-2 mg selectively and uniformly labeled samples beta-amyloid peptide	none	10	7.4	ambient	288
8	2D 13C-13C with PAR	1-2 mg selectively and uniformly labeled samples beta-amyloid peptide	none	10	7.4	ambient	288
9	2D 15N-13C TEDOR	1-2 mg selectively and uniformly labeled samples beta-amyloid peptide	none	10	7.4	ambient	288
10	2D 15N-13C TEDOR	1-2 mg selectively and uniformly labeled samples beta-amyloid peptide	none	10	7.4	ambient	288
11	15N- and 13C-BARE	1-2 mg selectively and uniformly labeled samples beta-amyloid peptide	none	10	7.4	ambient	288
12	13C PITHIRDS-CT	1-2 mg selectively and uniformly labeled samples beta-amyloid peptide	none	10	7.4	ambient	288
13	2D 13C-13C with fpRFDR	1-2 mg selectively and uniformly labeled samples beta-amyloid peptide	none	10	7.4	ambient	288

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	InfinityPlus	600
2	Varian	Infinity	750
3	Varian	InfinityPlus	400

NMR Refinement
Method	Details	Software
simulated annealing	Includes "non-crystallographic" symmetry, 3-fold rotational symmetry, and translational symmetry restraints. Three stages of annealing, starting with random configuration of nine beta-amyloid peptide molecules. See publication for full details.	X-PLOR NIH

NMR Ensemble Information
Conformer Selection Criteria	no violations, low restraint energy, and maximum structural diversity
Conformers Calculated Total Number	600
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure calculations	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore
2	refinement	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore