2NNT | pdb_00002nnt

General structural motifs of amyloid protofilaments

SOLID-STATE NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	MAS CP-PDSD	uniform 13C,15N labeling, 15 mg fibre in phosphate buffer	phosphate buffer		7.0	1 atm	285
2	MAS CP-PDSD	uniform 13C,15N labeling, 15 mg fibre in phosphate buffer	phosphate buffer
3	MAS CP-PDSD	uniform 13C,15N labeling, 15 mg fibre in phosphate buffer	phosphate buffer
4	MAS CP-PDSD	uniform 13C,15N labeling, 15 mg fibre in phosphate buffer	phosphate buffer

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	900

NMR Refinement
Method	Details	Software
simulated annealing, molecular dynamics	simulated annealing was performed with 25 MAS-NMR derived long range distance constraints and hydrogend bond constraints between the beta strands of 6 repeat units of the protofilament. Conformer (residues 0-30; 0=M of the N-terminal GSM tag) of lowest energy of the four inner repeat units was subjected to a 1 ns molecular dynamics simulation in water. To distinguish the residues per repeat unit, for annotation an initial digid as hundred is added , such as A: 200-230, B: 300-330, C: 400-430, D: 500-530)	TopSpin

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	30
Conformers Submitted Total Number	10
Representative Model	1 (lowest energy)

Additional NMR Experimental Information
Details	4mm and 3.2mm triple resonance MAS probes were used and spinning of 10.5 kHz was applied.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	TopSpin	1.3	Bruker
2	data analysis	Sparky	3.100	Goddard, T.D., Kneller, D.G.
3	structure solution	Amber	7.0	Case, D.A. et al.
4	refinement	Amber	7.0	Case, D.A. et al.