1Q2K | pdb_00001q2k

Solution structure of BmBKTx1 a new potassium channel blocker from the Chinese Scorpion Buthus martensi Karsch

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	3mM BmBKTx1; pH 5.0	0.45ml of 90% H2O, 10% D2O (v/v)		5.0	1 atm	300
2	2D TOCSY	3mM BmBKTx1; pH 5.0	0.45ml of 90% H2O, 10% D2O (v/v)		5.0	1 atm	300
3	DQF-COSY	3mM BmBKTx1; pH 5.0	0.45ml of 90% H2O, 10% D2O (v/v)		5.0	1 atm	300
4	2D TOCSY	3mM BmBKTx1	99.96% D2O		5.0	1 atm	292

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DMX	500

NMR Refinement
Method	Details	Software
simulated annealing, energy minimization		CNS

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	21
Representative Model	1 (minimized average structure)

Additional NMR Experimental Information
Details	the structures are based on a total of 322 restraints, 287 are NOE-derived distance constraints, 21 dihedral angle restraints, 14 distance restraints from hydrogen bonds

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	CNS	1.0
2	data analysis	XEASY	3.2	Wuthrich, K
3	data analysis	DIANA	2.8	Peter Guntert
4	refinement	CNS	1.0