1JOO

Averaged structure for unligated Staphylococcal nuclease-H124L

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	E-COSY	3.5-5 mM Nuclease-H124L U-50% 2H; 300 mM KCl; D2O	D2O	300 nM KCl	5.5	ambient	318
2	HMQC-J	3.5-5 mM Nuclease-H124L U-95% 15N; 300 mM KCl; H2O	H2O	300 nM KCl	5.1	ambient	318
3	DQF-COSY	3.5-5 mM Nuclease-H124L; 300 mM KCl; D2O	D2O	300 nM KCl	5.5	ambient	318
4	2D NOESY	3.5-5 mM Nuclease-H124L U-50% 2H; 300 mM KCl; D2O	D2O	300 nM KCl	5.5	ambient	318
5	2D NOESY	3.5-5 mM Nuclease-H124L U-50% 2H; 300 mM KCl; H2O	H2O	300 nM KCl	5.1	ambient	318
6	3D 1H-15N NOESY-HMQC	3.5-5 mM Nuclease-H124L U-95% 15N; 300 mM KCl; H2O	H2O	300 nM KCl	5.1	ambient	318
7	2D 1H-13C HMQC	3.5-5 mM Nuclease-H124L U-98% 13C; 300 mM KCl; H2O	H2O	300 nM KCl	5.1	ambient	318
8	HNCO	3.5-5 mM Nuclease-H124L U-98% 13C U-99% 15N; 300 mM KCl; H2O	H2O	300 nM KCl	5.1	ambient	318
9	3D HNCA	3.5-5 mM Nuclease-H124L U-98% 13C U-99% 15N; 300 mM KCl; H2O	H2O	300 nM KCl	5.1	ambient	318
10	and others	3.5-5 mM Nuclease-H124L U-50% 2H; 300 mM KCl; D2O	D2O	300 nM KCl	5.5	ambient	318

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AM	500
2	Bruker	AM	600

NMR Refinement
Method	Details	Software
Distance, hydrogen bond and torsion angle constraints	2176 constraints were used to calculate the structure	Felix

NMR Ensemble Information
Conformer Selection Criteria
Conformers Calculated Total Number
Conformers Submitted Total Number	1
Representative Model	(minimized average structure)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	Felix		Biosym Technologies Inc
2	structure solution	X-PLOR	3.1	Brunger
3	structure solution	Insight II	2.3	Biosym Technologies Inc
4	structure solution	HBPLUS		McDonald and Thornton
5	refinement	X-PLOR	3.1	Brunger