5Y7L

Solution structure of Hbeta4 extracellular loop of BK potassium channel

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D HNCA	0.5 mM [U-13C; U-15N] Hbeta4, 25 mM sodium phosphate, 50 mM sodium chloride	90% H2O/10% D2O	75 mM	6.8	1 atm	293	Varian INOVA 600
2	3D HNCACB	0.5 mM [U-13C; U-15N] Hbeta4, 25 mM sodium phosphate, 50 mM sodium chloride	90% H2O/10% D2O	75 mM	6.8	1 atm	293	Varian INOVA 600
3	3D CBCA(CO)NH	0.5 mM [U-13C; U-15N] Hbeta4, 25 mM sodium phosphate, 50 mM sodium chloride	90% H2O/10% D2O	75 mM	6.8	1 atm	293	Varian INOVA 600
4	3D HNCO	0.5 mM [U-13C; U-15N] Hbeta4, 25 mM sodium phosphate, 50 mM sodium chloride	90% H2O/10% D2O	75 mM	6.8	1 atm	293	Varian INOVA 600
5	3D 1H-15N TOCSY	0.5 mM [U-13C; U-15N] Hbeta4, 25 mM sodium phosphate, 50 mM sodium chloride	90% H2O/10% D2O	75 mM	6.8	1 atm	293	Varian INOVA 600
6	3D 1H-15N NOESY	0.5 mM [U-13C; U-15N] Hbeta4, 25 mM sodium phosphate, 50 mM sodium chloride	90% H2O/10% D2O	75 mM	6.8	1 atm	293	Varian INOVA 600
7	2D 1H-13C HSQC aliphatic	0.5 mM [U-13C; U-15N] Hbeta4, 25 mM sodium phosphate, 50 mM sodium chloride, 100% D2O	100% D2O	75 mM	6.8	1 atm	293	Varian INOVA 600
8	2D 1H-13C HSQC aromatic	0.5 mM [U-13C; U-15N] Hbeta4, 25 mM sodium phosphate, 50 mM sodium chloride, 100% D2O	100% D2O	75 mM	6.8	1 atm	293	Varian INOVA 600
9	3D 1H-13C NOESY aliphatic	0.5 mM [U-13C; U-15N] Hbeta4, 25 mM sodium phosphate, 50 mM sodium chloride, 100% D2O	100% D2O	75 mM	6.8	1 atm	293	Varian INOVA 600
10	3D 1H-13C NOESY aromatic	0.5 mM [U-13C; U-15N] Hbeta4, 25 mM sodium phosphate, 50 mM sodium chloride, 100% D2O	100% D2O	75 mM	6.8	1 atm	293	Varian INOVA 600
11	3D HCCH-TOCSY	0.5 mM [U-13C; U-15N] Hbeta4, 25 mM sodium phosphate, 50 mM sodium chloride, 100% D2O	100% D2O	75 mM	6.8	1 atm	293	Varian INOVA 600

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	600

NMR Refinement
Method	Details	Software
simulated annealing		X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	NMRDraw		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
2	chemical shift assignment	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
3	refinement	X-PLOR		Brunger