2FWS

First Ca2+ binding domain of the Na,Ca-exchanger (NCX1)

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_13C separated aliphatic NOESY	0.5-1.0mM 13C, 15N CBD1 sample (residues 371-509) in 20mM HEPES buffer (pH 7.0), 20mM beta-Mercaptoethanol	95% ddH2O, 5% D2O	20mM HEPES (sodium salt)	7.0	ambient	306
2	3D_13C separated aromatic NOESY	0.5-1.0mM 13C, 15N CBD1 sample (residues 371-509) in 20mM HEPES buffer (pH 7.0), 20mM beta-Mercaptoethanol	95% ddH2O, 5% D2O	20mM HEPES (sodium salt)	7.0	ambient	306
3	3D_15N-separated_NOESY	0.5-1.0mM 13C, 15N CBD1 sample (residues 371-509) in 20mM HEPES buffer (pH 7.0), 20mM beta-Mercaptoethanol	95% ddH2O, 5% D2O	20mM HEPES (sodium salt)	7.0	ambient	306

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	800
2	Varian	INOVA	600

NMR Refinement
Method	Details	Software
torsion angle dynamics	The structures are based on 2313 NOE-derived distance constraints, 175 dihedral angle restraints (talos), 9 distance constraints to the 2 Ca2+ ions	NMRPipe

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)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	NMRPipe	2.1	Delaglio, F.
2	data analysis	XEASY	1.3.13	Bartels, C.
3	structure solution	CYANA	2.0	Guentert, P.
4	refinement	X-PLOR	NIH version 2.9.7	Clore, G.M.