1IE6

SOLUTION STRUCTURE OF IMPERATOXIN A

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	5mM Imperatoxin A; 90% H2O, 10% D2O	90% H2O/10% D2O	0	3.4	ambient	300
2	DQF-COSY	5mM Imperatoxin A; 90% H2O, 10% D2O	90% H2O/10% D2O	0	3.4	ambient	300
3	E-COSY	5mM Imperatoxin A; 90% H2O, 10% D2O	90% H2O/10% D2O	0	3.4	ambient	300

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DRX	600

NMR Refinement
Method	Details	Software
distance geometry simulated annealing	The structures are based on a total of 519 restraints, 473 are NOE-derived distance constraints, 25 dihedral angle restraints, 12 distance restraints from hydrogen bonds, and 9 distance restraints form disulfide bonds.	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	The submitted conformer models are those with the lowest energy and the least restraint violations.
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20
Representative Model	11 (closest to the average)

Additional NMR Experimental Information
Details	This structure was determined using standard 2D homonuclear techniques.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	3.0	Bruker
2	processing	XwinNMR	3.0	Bruker
3	structure solution	X-PLOR	3.851	Brunger
4	refinement	X-PLOR	3.851	Brunger