2AXK

Solution structure of discrepin, a scorpion venom toxin blocking K+ channels.

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	3 mM discrepin 10% D2O	90% H2O/10% D2O	5	4	ambient	308
2	2Q-COSY	3 mM discrepin 100% D2O	100% D2O	5	4	ambient	308
3	2D NOESY	3 mM discrepin 10% D2O	90% H2O/10% D2O	5	4	ambient	308

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

NMR Refinement
Method	Details	Software
torsion angle dynamics	structures based on total of 565 meaningful distance constraints, 22 dihedral angle constraints and three hydrogen bonds. Three disulfide bridges (8-29, 14-34, 18-36) were also included in caclulation.	VNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy and best secondary structure
Conformers Calculated Total Number	200
Conformers Submitted Total Number	10
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1C	Varian Inc.
2	data analysis	XEASY	3.1	Bartels et al.
3	structure solution	ARIA	1.2	Nilges et al.
4	structure solution	CNS	1.1	Brunger
5	refinement	CNS	1.1	Brunger

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.