7OTD

Oxytocin NMR solution structure

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H COSY	3.3 mM oxytocin, 5 mM ammonium acetate buffer, 10 % v/v [U-100% 2H] D2O, 90 % v/v H2O, 0.33 mM CuCl2	90% H2O/10% D2O	14.9 mM	6.7	1 atm	293.2	Bruker AVANCE II 500
2	2D 1H-1H TOCSY	3.3 mM oxytocin, 5 mM ammonium acetate buffer, 10 % v/v [U-100% 2H] D2O, 90 % v/v H2O, 0.33 mM CuCl2	90% H2O/10% D2O	14.9 mM	6.7	1 atm	293.2	Bruker AVANCE II 500
3	2D 1H-1H ROESY	3.3 mM oxytocin, 5 mM ammonium acetate buffer, 10 % v/v [U-100% 2H] D2O, 90 % v/v H2O, 0.33 mM CuCl2	90% H2O/10% D2O	14.9 mM	6.7	1 atm	293.2	Bruker AVANCE II 500

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE II	500

NMR Refinement
Method	Details	Software
DGSA-distance geometry simulated annealing	XPLOR-NIH	CNS

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	50
Conformers Submitted Total Number	10
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	TopSpin		Bruker Biospin
2	peak picking	NMRFAM-SPARKY	1.470	Lee, W.; Tonelli, M.; Markley, J. L. NMRFAM-SPARKY: Enhanced Software for Biomolecular NMR Spectroscopy. Bioinformatics 2015, 31 (8), 1325-1327.
3	chemical shift assignment	NMRFAM-SPARKY	1.470	Lee, W.; Tonelli, M.; Markley, J. L. NMRFAM-SPARKY: Enhanced Software for Biomolecular NMR Spectroscopy. Bioinformatics 2015, 31 (8), 1325-1327.
4	chemical shift assignment	NMRFAM-SPARKY	1.470	Lee, W.; Tonelli, M.; Markley, J. L. NMRFAM-SPARKY: Enhanced Software for Biomolecular NMR Spectroscopy. Bioinformatics 2015, 31 (8), 1325-1327.
5	structure calculation	CNS		Schwieters, C. D.; Kuszewski, J. J.; Tjandra, N.; Clore, G. M. The Xplor-NIH NMR Molecular Structure Determination Package. J. Magn. Reson. 2003, 160 (1), 65
6	data analysis	UCSF Chimera	1.14	Pettersen, E. F.; Goddard, T. D.; Huang, C. C.; Couch, G. S.; Greenblatt, D. M.; Meng, E. C.; Ferrin, T. E. UCSF Chimera - A Visualization System for Exploratory Research and Analysis. J. Comput. Chem. 2004, 25 (13), 1605-1612.