1JLZ

Solution Structure of a K+-Channel Blocker from the Scorpion Toxin of Tityus cambridgei

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	2mM Tc1; 50mM phosphate buffer; 90% H2O, 10% D2O	90% H2O/10% D2O		3.0	ambient	275
2	DQF-COSY	2mM Tc1; 50mM phosphate buffer; 90% H2O, 10% D2O	90% H2O/10% D2O		3.0	ambient	275
3	2D TOCSY	2mM Tc1; 50mM phosphate buffer; 90% H2O, 10% D2O	90% H2O/10% D2O		3.0	ambient	275

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

NMR Refinement
Method	Details	Software
simulated annealing	The structures are based on a total of 200 restraints, 163 are NOE-derived distance constraints, 21 dihedral angle restraints,16 distance restraints from hydrogen bonds.	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	15
Representative Model	6 (lowest energy)

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

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	XwinNMR	2.5
2	data analysis	AURELIA	2.1
3	refinement	X-PLOR	98	Brunger

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.