1G9P

SOLUTION STRUCTURE OF THE INSECTICIDAL CALCIUM CHANNEL BLOCKER OMEGA-ATRACOTOXIN-HV2A

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	H2O 2D_NOESY	1.2 mM omega-atracotoxin-Hv2a	95% H2O, 5% D2O, 5 micromolar chloramphenicol, 100 micromolar TSP	0.005	4.71	1 atm	296
2	D2O 2D_NOESY	1.2 mM omega-atracotoxin-Hv2a	95% H2O, 5% D2O, 5 micromolar chloramphenicol, 100 micromolar TSP	0.005	4.71	1 atm	296
3	2D TOCSY	1.2 mM omega-atracotoxin-Hv2a	95% H2O, 5% D2O, 5 micromolar chloramphenicol, 100 micromolar TSP	0.005	4.71	1 atm	288
4	E-COSY	1.2 mM omega-atracotoxin-Hv2a	95% H2O, 5% D2O, 5 micromolar chloramphenicol, 100 micromolar TSP	0.005	4.71	1 atm	288
5	DQF-COSY	1.2 mM omega-atracotoxin-Hv2a	100% D2O	0.005	4.71	1 atm	296

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	600
2	Varian	INOVA	600

NMR Refinement
Method	Details	Software
TORSION ANGLE DYNAMICS FOLLOWED BY DYNAMICAL SIMULATED ANNEALING	The structures are based on a total of 430 NOE-derived distance restraints, 34 dihedral-angle restraints, plus 24 restraints defining 12 hydrogen bonds.	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

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

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	2.0	Bruker Analytik GmbH
2	processing	XwinNMR	2.0	Bruker Analytik GmbH
3	processing	Felix	97	Molecular Simulations Inc.
4	data analysis	XEASY	1.3.13	Tai-he Xia & Christian Bartels
5	structure solution	DYANA	1.5	Peter Guentert
6	refinement	X-PLOR	3.1	Axel Brunger
7	collection	VNMR	6.1B	Varian Inc.

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.