2M00

Solution structure of staphylococcal nuclease E43S mutant in the presence of ssDNA and Cd2+

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N HSQC	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
2	2D 1H-13C HSQC	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
3	3D HNCA	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
4	3D HN(CO)CA	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
5	3D HNCO	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
6	3D HN(CA)CO	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
7	3D CBCA(CO)NH	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
8	3D HNCACB	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
9	3D HBHA(CO)NH	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
10	3D HBHANH	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
11	3D 1H-15N TOCSY	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
12	3D HCCH-TOCSY	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
13	3D HCCH-COSY	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
14	3D 1H-15N NOESY	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
15	3D 1H-13C NOESY aliphatic	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305
16	3D 1H-13C NOESY aromatic	1.0-1.5 mM [U-13C; U-15N] protein, 50 mM sodium phosphate, 150 mM potassium chloride, 10 mM CdCl2, 0.002 w/v sodium azide, 1.5-2.25 mM 8-mer ssDNA(5'-CACTTCAT-3')	90% H2O/10% D2O	210	6.6	ambient	305

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DMX	600

NMR Refinement
Method	Details	Software
molecular dynamics, simulated annealing		XwinNMR

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	collection	XwinNMR		Bruker Biospin
2	processing	Felix		Accelrys Software Inc.
3	chemical shift assignment	Felix		Accelrys Software Inc.
4	data analysis	Felix		Accelrys Software Inc.
5	structure solution	CNS		Brunger, Adams, Clore, Gros, Nilges and Read
6	refinement	CNS		Brunger, Adams, Clore, Gros, Nilges and Read