1WSO

The solution structures of human Orexin-A

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D TOCSY	0.76mM orexin-A; 18mM potassium phosphate buffer	90% H2O/10% D2O	18mM potassium phosphate	6.0	ambient	293
2	2D NOESY	0.76mM orexin-A; 18mM potassium phosphate buffer	90% H2O/10% D2O	18mM potassium phosphate	6.0	ambient	293
3	DQF-COSY	0.76mM orexin-A; 18mM potassium phosphate buffer	90% H2O/10% D2O	18mM potassium phosphate	6.0	ambient	293
4	2D TOCSY	0.76mM orexin-A; 18mM potassium phosphate buffer	99.9% D20	18mM potassium phosphate	6.0	ambient	293
5	2D NOESY	0.76mM orexin-A; 18mM potassium phosphate buffer	99.9% D20	18mM potassium phosphate	6.0	ambient	293
6	15N-1H-HSQC	0.76mM orexin-A; 18mM potassium phosphate buffer	90% H2O/10% D2O	18mM potassium phosphate	6.0	ambient	293
7	13C-1H-HSQC	0.76mM orexin-A; 18mM potassium phosphate buffer	90% H2O/10% D2O	18mM potassium phosphate	6.0	ambient	293

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DRX	800
2	Bruker	DRX	600
3	Bruker	DRX	500

NMR Refinement
Method	Details	Software
simulated annealing torsion angle dynamics	The N- and C-termini are modified with Pyrrolidone carboxylic acid, or pyroglutamic acid, and an amide group, respectively. Two intra-molecular disulfide bonds are formed between Cys6 and Cys12, and between Cys7 and Cys14.	NMRPipe

NMR Ensemble Information
Conformer Selection Criteria	target function
Conformers Calculated Total Number	100
Conformers Submitted Total Number	30
Representative Model	1 (closest to the average)

Additional NMR Experimental Information
Details	The structures were determined using 2D homonuclear and 15N, 13C natural abundance heteronuclear experiments.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	NMRPipe	2.2	Delaglio, F.
2	data analysis	Sparky	3.106	Goddard, T. D.
3	structure solution	CYANA	1.0.6	Guentert, P.
4	data analysis	TALOS	2003.027.13.05	Delaglio, F.
5	refinement	CYANA	1.0.6	Guentert, P.