2LT9

The solution structure of Ca2+ binding domain 2B of the third isoform of the Na+/Ca2+ exchanger

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N HSQC	0.5 mM [U-100% 13C; U-100% 15N] protein, 20 mM HEPES, 20 mM beta-mercaptoethanol, 10 mM CaCl2	95% H2O/5% D2O	20	7.0	ambient	306
2	3D HNCO	0.5 mM [U-100% 13C; U-100% 15N] protein, 20 mM HEPES, 20 mM beta-mercaptoethanol, 10 mM CaCl2	95% H2O/5% D2O	20	7.0	ambient	306
3	3D HNCACB	0.5 mM [U-100% 13C; U-100% 15N] protein, 20 mM HEPES, 20 mM beta-mercaptoethanol, 10 mM CaCl2	95% H2O/5% D2O	20	7.0	ambient	306
4	3D CBCA(CO)NH	0.5 mM [U-100% 13C; U-100% 15N] protein, 20 mM HEPES, 20 mM beta-mercaptoethanol, 10 mM CaCl2	95% H2O/5% D2O	20	7.0	ambient	306
5	3D HBHA(CO)NH	0.5 mM [U-100% 13C; U-100% 15N] protein, 20 mM HEPES, 20 mM beta-mercaptoethanol, 10 mM CaCl2	95% H2O/5% D2O	20	7.0	ambient	306
6	3D HCCH-TOCSY	0.5 mM [U-100% 13C; U-100% 15N] protein, 20 mM HEPES, 20 mM beta-mercaptoethanol, 10 mM CaCl2	95% H2O/5% D2O	20	7.0	ambient	306
7	3D HNHA	0.5 mM [U-100% 13C; U-100% 15N] protein, 20 mM HEPES, 20 mM beta-mercaptoethanol, 10 mM CaCl2	95% H2O/5% D2O	20	7.0	ambient	306
8	2D 1H-15N IPAP HSQC	0.5 mM [U-100% 15N] protein, 20 mM HEPES, 20 mM beta-mercaptoethanol, 10 mM CaCl2, 8 mg/mL Pf1 phage	95% H2O/5% D2O	20	7.0	ambient	306
9	2D 1H-13C IPAP HSQC	0.5 mM [U-100% 15N] protein, 20 mM HEPES, 20 mM beta-mercaptoethanol, 10 mM CaCl2	95% H2O/5% D2O	20	7.0	ambient	306
10	3D 1H-13C NOESY aliphatic	0.5 mM [U-100% 13C; U-100% 15N] protein, 20 mM HEPES, 20 mM beta-mercaptoethanol, 10 mM CaCl2	95% H2O/5% D2O	20	7.0	ambient	306
11	3D 1H-13C NOESY aromatic	0.5 mM [U-100% 13C; U-100% 15N] protein, 20 mM HEPES, 20 mM beta-mercaptoethanol, 10 mM CaCl2	95% H2O/5% D2O	20	7.0	ambient	306
12	3D 1H-15N NOESY	0.5 mM [U-100% 13C; U-100% 15N] protein, 20 mM HEPES, 20 mM beta-mercaptoethanol, 10 mM CaCl2	95% H2O/5% D2O	20	7.0	ambient	306
13	3D C(CO)NH	0.5 mM [U-100% 13C; U-100% 15N] protein, 20 mM HEPES, 20 mM beta-mercaptoethanol, 10 mM CaCl2	95% H2O/5% D2O	20	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
simulated annealing	THE SOLUTION STRUCTURE OF CALCIUM BINDING DOMAIN 2B OF NCX3 IS SOLVED IN EXCESS OF 10 MM CACL2. HOWEVER, CA IONS ARE NOT MODELED IN THE STRUCTURE, BECAUSE RESONANCES OF CRUCIAL COORDINATING RESIDUES ARE LACKING: RES 605 TO 610 AND 665 TO 669. THE REFINEMENT PROTOCOL IN EXPLICIT WATER, INCLUDING DISTANCE AND DIHEDRAL RESTRAINTS. THE RDC RESTRAINTS WERE NOT INCLUDED IN THE REFINEMENT.	CCPN_Analysis

NMR Ensemble Information
Conformer Selection Criteria	target function
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	chemical shift assignment	CCPN_Analysis	2.2.2	CCPN
2	peak picking	CCPN_Analysis	2.2.2	CCPN
3	processing	NMRPipe	2007	Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
4	data analysis	NMRDraw	2007	Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
5	structure solution	CYANA	3.0	Guntert, Mumenthaler and Wuthrich
6	refinement	YASARA	11.9.18	E. Krieger, Koraimann G, Vriend G

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.