7ZRU

Solution structure of Pi6, a low affinity blocking kappa-K+-channel peptide from the scorpion Pandinus imperator

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H TOCSY	0.19 mM pi6	90% H2O/10% D2O	0 mM	4	1 atm	298.15	Bruker AVANCE NEO 800
2	2D 1H-1H COSY	0.19 mM pi6	90% H2O/10% D2O	0 mM	4	1 atm	298.15	Bruker AVANCE NEO 800
3	2D 1H-1H NOESY	0.19 mM pi6	90% H2O/10% D2O	0 mM	4	1 atm	298.15	Bruker AVANCE NEO 800

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE NEO	800

NMR Refinement
Method	Details	Software
torsion angle dynamics	The structure ensemble is based on a total of 332 restraints, of which 309 are NOE derived distance restraints, 11 are hydrogen bonds and 12 are phi angle dihedral restraints	CNS

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

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure calculation	CNS		Brunger, Adams, Clore, Gros, Nilges and Read
2	structure calculation	ARIA		Linge, O'Donoghue and Nilges
3	chemical shift assignment	CcpNmr Analysis	2.4.2	CCPN
4	peak picking	CcpNmr Analysis	2.4.2	CCPN
5	collection	TopSpin	4.1	Bruker Biospin

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.