2KSZ

The solution structure of the Magnesium bound soybean calmodulin isoform 4 N-domain

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 15N-HSQC-IPAP	0.5 mM [U-100% 15N] Mg-sCaM4-10, 20 mM MAGNESIUM ION-11, 100 mM potassium chloride-12, 0.5 mM EGTA-13, 16 mg/mL Pf1 phage-14	90% H2O/10% D2O	100	7	ambient	303
2	3D IPAP-J-HNCO(CA)-CaHa RDC	0.5 mM [U-100% 13C; U-100% 15N] Mg-sCaM4-5, 20 mM MAGNESIUM ION-6, 100 mM potassium chloride-7, 0.5 mM EGTA-8, 16 mg/mL Pf1 phage-9	90% H2O/10% D2O	100	7	ambient	303
3	3D IPAP-J-HNCO-CaCO RDC	0.5 mM [U-100% 13C; U-100% 15N] Mg-sCaM4-5, 20 mM MAGNESIUM ION-6, 100 mM potassium chloride-7, 0.5 mM EGTA-8, 16 mg/mL Pf1 phage-9	90% H2O/10% D2O	100	7	ambient	303
4	3D HNCACB	0.5 mM [U-100% 13C; U-100% 15N] Mg-sCaM4-1, 20 mM MAGNESIUM ION-2, 100 mM potassium chloride-3, 0.5 mM EGTA-4	90% H2O/10% D2O	100	7	ambient	303
5	3D HNCO	0.5 mM [U-100% 13C; U-100% 15N] Mg-sCaM4-1, 20 mM MAGNESIUM ION-2, 100 mM potassium chloride-3, 0.5 mM EGTA-4	90% H2O/10% D2O	100	7	ambient	303
6	3D HN(CO)CA	0.5 mM [U-100% 13C; U-100% 15N] Mg-sCaM4-1, 20 mM MAGNESIUM ION-2, 100 mM potassium chloride-3, 0.5 mM EGTA-4	90% H2O/10% D2O	100	7	ambient	303
7	3D CBCA(CO)NH	0.5 mM [U-100% 13C; U-100% 15N] Mg-sCaM4-1, 20 mM MAGNESIUM ION-2, 100 mM potassium chloride-3, 0.5 mM EGTA-4	90% H2O/10% D2O	100	7	ambient	303

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

NMR Refinement
Method	Details	Software
simulated annealing, torsion angle dynamics		X-PLOR NIH

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest RDC energy
Conformers Calculated Total Number	10
Conformers Submitted Total Number	5
Representative Model	1 (lowest rdc energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore
2	refinement	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore