2RQ2

The solution structure of the N-terminal fragment of big defensin

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H COSY	0.30-0.35mM big-N-1, 50mM [U-99% 2H] acetic acid-2, 20mM sodium chloride-3, 100mM [U-99% 2H] SDS-4	95% H2O/5% D2O		3.5	ambient	303
2	2D 1H-1H TOCSY	0.30-0.35mM big-N-1, 50mM [U-99% 2H] acetic acid-2, 20mM sodium chloride-3, 100mM [U-99% 2H] SDS-4	95% H2O/5% D2O		3.5	ambient	303
3	2D 1H-1H NOESY	0.30-0.35mM big-N-1, 50mM [U-99% 2H] acetic acid-2, 20mM sodium chloride-3, 100mM [U-99% 2H] SDS-4	95% H2O/5% D2O		3.5	ambient	303
4	2D 1H-1H COSY	0.30-0.35mM big-N-5, 50mM [U-99% 2H] acetic acid-6, 20mM sodium chloride-7, 100mM [U-99% 2H] SDS-8	100% D2O		3.5	ambient	303
5	2D 1H-1H TOCSY	0.30-0.35mM big-N-5, 50mM [U-99% 2H] acetic acid-6, 20mM sodium chloride-7, 100mM [U-99% 2H] SDS-8	100% D2O		3.5	ambient	303
6	2D 1H-1H NOESY	0.30-0.35mM big-N-5, 50mM [U-99% 2H] acetic acid-6, 20mM sodium chloride-7, 100mM [U-99% 2H] SDS-8	100% D2O		3.5	ambient	303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	800

NMR Refinement
Method	Details	Software
simulated annealing		XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	50
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR		Bruker Biospin
2	processing	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
3	chemical shift assignment	Sparky		Goddard
4	peak picking	Sparky		Goddard
5	structure solution	X-PLOR		Brunger
6	refinement	X-PLOR		Brunger