5T8A

Recombinant cytotoxin-I from the venom of cobra N. oxiana

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D HNCA	1 mM U-99% 13C; U-99% 15N recombinant cytotoxin-I, 95 v/v non-labeled H2O, 5 v/v 99.9% 2H D2O, 3 uM non-labeled NaOH, 1 uM non-labeled HCl	95% H2O/5% D2O	0	6.5	101325 Pa	303	Bruker AVANCE 700
2	3D HNCACB	1 mM U-99% 13C; U-99% 15N recombinant cytotoxin-I, 95 v/v non-labeled H2O, 5 v/v 99.9% 2H D2O, 3 uM non-labeled NaOH, 1 uM non-labeled HCl	95% H2O/5% D2O	0	6.5	101325 Pa	303	Bruker AVANCE 700
3	3D HNCO	1 mM U-99% 13C; U-99% 15N recombinant cytotoxin-I, 95 v/v non-labeled H2O, 5 v/v 99.9% 2H D2O, 3 uM non-labeled NaOH, 1 uM non-labeled HCl	95% H2O/5% D2O	0	6.5	101325 Pa	303	Bruker AVANCE 700
4	3D HN(COCA)CB	1 mM U-99% 13C; U-99% 15N recombinant cytotoxin-I, 95 v/v non-labeled H2O, 5 v/v 99.9% 2H D2O, 3 uM non-labeled NaOH, 1 uM non-labeled HCl	95% H2O/5% D2O	0	6.5	101325 Pa	303	Bruker AVANCE 700
5	3D HCCH-TOCSY	1 mM U-99% 13C; U-99% 15N recombinant cytotoxin-I, 95 v/v non-labeled H2O, 5 v/v 99.9% 2H D2O, 3 uM non-labeled NaOH, 1 uM non-labeled HCl	95% H2O/5% D2O	0	6.5	101325 Pa	303	Bruker AVANCE 700
6	2D 1H-15N HSQC	1 mM U-99% 13C; U-99% 15N recombinant cytotoxin-I, 95 v/v non-labeled H2O, 5 v/v 99.9% 2H D2O, 3 uM non-labeled NaOH, 1 uM non-labeled HCl	95% H2O/5% D2O	0	6.5	101325 Pa	303	Bruker AVANCE 700
7	2D 1H-13C HSQC aliphatic	1 mM U-99% 13C; U-99% 15N recombinant cytotoxin-I, 95 v/v non-labeled H2O, 5 v/v 99.9% 2H D2O, 3 uM non-labeled NaOH, 1 uM non-labeled HCl	95% H2O/5% D2O	0	6.5	101325 Pa	303	Bruker AVANCE 700
8	3D 1H-15N NOESY	1 mM U-99% 13C; U-99% 15N recombinant cytotoxin-I, 95 v/v non-labeled H2O, 5 v/v 99.9% 2H D2O, 3 uM non-labeled NaOH, 1 uM non-labeled HCl	95% H2O/5% D2O	0	6.5	101325 Pa	303	Bruker AVANCE 700
9	3D 1H-13C NOESY aliphatic	1 mM U-99% 13C; U-99% 15N recombinant cytotoxin-I, 95 v/v non-labeled H2O, 5 v/v 99.9% 2H D2O, 3 uM non-labeled NaOH, 1 uM non-labeled HCl	95% H2O/5% D2O	0	6.5	101325 Pa	303	Bruker AVANCE 700
10	1D-watergate	1 mM U-99% 13C; U-99% 15N recombinant cytotoxin-I, 95 v/v non-labeled H2O, 5 v/v 99.9% 2H D2O, 3 uM non-labeled NaOH, 1 uM non-labeled HCl	95% H2O/5% D2O	0	6.5	101325 Pa	303	Bruker AVANCE 600

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	700
2	Bruker	AVANCE	600

NMR Refinement
Method	Details	Software
simulated annealing		CYANA
restrained Rosetta protocol	as in: J Am Chem Soc. 2014 Feb 5;136(5):1893-90. Protein NMR structures refined with Rosetta have higher accuracy relative to corresponding X-ray crystal structures. Mao B, Tejero R, Baker D, Montelione GT.	Rosetta

NMR Ensemble Information
Conformer Selection Criteria	target function
Conformers Calculated Total Number	200
Conformers Submitted Total Number	20
Representative Model	6 (quality score)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	TopSpin	2.0.a	Bruker Biospin
5	chemical shift assignment	CARA	1.8.4	Keller and Wuthrich
2	structure calculation	CYANA	1.0.6	Guntert, Mumenthaler and Wuthrich
6	refinement	Rosetta	3.3	David Baker, University of Washington