Experiment: 6OTB

NMR structure of alpha conotoxin SII

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N HSQC	20 mM sodium phosphate, 2.1 mM Alpha conotoxin SII	95% H2O/5% D2O	20 mM	6	1 atm	298	Bruker AVANCE III 600
2	2D 1H-13C HSQC	20 mM sodium phosphate, 2.1 mM Alpha conotoxin SII	95% H2O/5% D2O	20 mM	6	1 atm	298	Bruker AVANCE III 600
3	2D 1H-1H TOCSY	20 mM sodium phosphate, 2.1 mM Alpha conotoxin SII	95% H2O/5% D2O	20 mM	6	1 atm	298	Bruker AVANCE III 600
4	2D 1H-1H NOESY	20 mM sodium phosphate, 2.1 mM Alpha conotoxin SII	95% H2O/5% D2O	20 mM	6	1 atm	298	Bruker AVANCE III 600

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE III	600

NMR Refinement
Method	Details	Software
torsion angle dynamics	The authors state that they initially calculated and kept 30 structures according to the structures' target function. Then they selected 20 out of the 30 according to the MolProbity score (i.e. stereochemical properties).	CYANA

NMR Ensemble Information
Conformer Selection Criteria	target function
Conformers Calculated Total Number	30
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	TopSpin		Bruker Biospin
2	refinement	CYANA		Guntert, Mumenthaler and Wuthrich
3	chemical shift assignment	CcpNmr Analysis		CCPN
4	geometry optimization	TALOS		Cornilescu, Delaglio and Bax
5	peak picking	CcpNmr Analysis		CCPN
6	chemical shift assignment	CYANA		Guntert, Mumenthaler and Wuthrich
7	structure calculation	CYANA		Guntert, Mumenthaler and Wuthrich