2M4X

Analysis of the structural and molecular basis of voltage-sensitive sodium channel inhibition by the spider toxin, Huwentoxin-IV (-TRTX-Hh2a).

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N HSQC	2 mM HWTX-IV, 20 mM sodium phosphate, 150 uM sodium azide, 100 uM EDTA	90% H2O/10% D2O		6.7	ambient	25
2	2D 1H-1H TOCSY	2 mM HWTX-IV, 20 mM sodium phosphate, 150 uM sodium azide, 100 uM EDTA	90% H2O/10% D2O		6.7	ambient	25
3	2D 1H-1H NOESY	2 mM HWTX-IV, 20 mM sodium phosphate, 150 uM sodium azide, 100 uM EDTA	90% H2O/10% D2O		6.7	ambient	25
4	2D 1H-13C HSQC	2 mM HWTX-IV, 20 mM sodium phosphate, 150 uM sodium azide, 100 uM EDTA	90% H2O/10% D2O		6.7	ambient	25

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	950

NMR Refinement
Method	Details	Software
simulated annealing		CYANA

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	500
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	CYANA		Guntert, Mumenthaler and Wuthrich
2	refinement	CYANA		Guntert, Mumenthaler and Wuthrich