2K72

Solution NMR structure of toxin-like potassium channel blocking domain in MMP23

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H TOCSY	2.25 mM MMP23-BgK	94% H2O/6% D2O		5.00	ambient	278
2	2D 1H-1H NOESY	2.25 mM MMP23-BgK	94% H2O/6% D2O		5.00	ambient	278
3	2D DQF-COSY	2.25 mM MMP23-BgK	94% H2O/6% D2O		5.00	ambient	293
4	2D 1H-13C HSQC	2.25 mM MMP23-BgK	94% H2O/6% D2O		5.00	ambient	293
5	2D 1H-15N HSQC	2.25 mM MMP23-BgK	94% H2O/6% D2O		5.00	ambient	293
6	2D 1H-1H TOCSY	2.2 mM MMP23-BgK	100% D2O		5.00	ambient	278
7	2D 1H-1H NOESY	2.2 mM MMP23-BgK	100% D2O		5.00	ambient	278
8	2D 1H-1H TOCSY	2.25 mM MMP23-BgK	94% H2O/6% D2O		5.00	ambient	293
9	2D 1H-1H NOESY	2.25 mM MMP23-BgK	94% H2O/6% D2O		5.00	ambient	293

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DRX	600
2	Bruker	AVANCE	500

NMR Refinement
Method	Details	Software
simulated annealing		X-PLOR NIH

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	200
Conformers Submitted Total Number	20
Representative Model	1 (closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore
2	structure solution	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore
3	processing	XEASY	1.3.13	Bartels et al.
4	collection	XEASY	1.3.13	Bartels et al.
5	processing	TopSpin	1.3	Bruker Biospin
6	collection	TopSpin	1.3	Bruker Biospin
7	structure solution	CYANA		Guntert, Mumenthaler and Wuthrich
8	refinement	TALOS		Cornilescu, Delaglio and Bax