2KRD

Solution Structure of the Regulatory Domain of Human Cardiac Troponin C in Complex with the Switch Region of cardiac Troponin I and W7

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N HSQC	0.8 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 9 mM calcium chloride, 2.5 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 4.2 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.5 mM DSS	90% H2O/10% D2O		6.8	ambient	303
2	2D 1H-13C HSQC	0.8 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 9 mM calcium chloride, 2.5 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 4.2 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.5 mM DSS	90% H2O/10% D2O		6.8	ambient	303
3	2D DQF-COSY	0.5 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 9 mM calcium chloride, 3 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 2.2 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.2 mM DSS	100% D2O		6.8	ambient	303
4	3D CBCA(CO)NH	0.8 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 9 mM calcium chloride, 2.5 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 4.2 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.5 mM DSS	90% H2O/10% D2O		6.8	ambient	303
5	3D C(CO)NH	0.8 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 9 mM calcium chloride, 2.5 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 4.2 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.5 mM DSS	90% H2O/10% D2O		6.8	ambient	303
6	3D HNCACB	0.8 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 9 mM calcium chloride, 2.5 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 4.2 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.5 mM DSS	90% H2O/10% D2O		6.8	ambient	303
7	3D 1H-15N NOESY	0.5 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 3 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 2.1 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.5 mM DSS, 10 mM calcium chloride	90% H2O/10% D2O		6.8	ambient	303
8	3D 1H-13C NOESY	0.5 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 3 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 2.1 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.5 mM DSS, 10 mM calcium chloride	90% H2O/10% D2O		6.8	ambient	303
9	2D 1H-1H NOESY	0.5 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 9 mM calcium chloride, 3 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 2.2 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.2 mM DSS	100% D2O		6.8	ambient	303
10	2D CNfilnoesy	0.5 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 9 mM calcium chloride, 2.8 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 2 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.2 mM DSS	100% D2O		6.8	ambient	303
11	2D CNfiltocsy	0.5 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 9 mM calcium chloride, 2.8 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 2 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.2 mM DSS	100% D2O		6.8	ambient	303
12	3D gChmqcnoesy_CNfilt	0.7 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 9 mM calcium chloride, 2.9 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 3.6 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.4 mM DSS	100% D2O		6.8	ambient	303
13	2D hbcbcgcdhdA	0.8 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 9 mM calcium chloride, 2.5 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 4.2 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.5 mM DSS	90% H2O/10% D2O		6.8	ambient	303
14	3D HC(CO)HN	0.8 mM [U-13C; U-15N] cNTnC, 10 mM imidazole, 100 mM potassium chloride, 9 mM calcium chloride, 2.5 mM N-(6-AMINOHEXYL)-5-CHLORO-1-NAPHTHALENESULFONAMIDE, 4.2 mM cTnI(147-163), 15 mM Dithiothreitol (DTT), 0.5 mM DSS	90% H2O/10% D2O		6.8	ambient	303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	800
2	Varian	UNITY	600
3	Varian	INOVA	500

NMR Refinement
Method	Details	Software
simulated annealing	Protonated form of W7 was used during water refinement. Positive charge on W7 tail (-CH2-NH3+ group) was added manually in analogy to positive charge on -CH2-NH3+ group in LYS+.	VnmrJ

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	300
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VnmrJ		Varian
2	processing	NMRPipe		Delaglio, F. et al.
3	chemical shift assignment	NMRView		Johnson, B. et al.
4	data analysis	NMRView		Johnson, B. et al.
5	peak picking	NMRView		Johnson, B. et al.
6	chemical shift assignment	CYANA		Guntert, P. et al.
7	dihedral angles calculation	TALOS		Cornilescu, G. et al.
8	structure solution	X-PLOR NIH		Schwieters, C. et al.
9	refinement	X-PLOR NIH		Schwieters, C. et al.

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.