Experiment: 1PU3

The Solution NMR Structure and Dynamics of a Recombinant Onconase with Altered N-terminal and Met23 residues

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	HNHA	1.5 mM (M-1, Q1, M23L)rONC [U-15N; U-13C]	50mM phosphate buffer pH4.1, 90% H2O, 10% D2O	0.3	4.1	ambient	310
2	3D_15N-separated_NOESY	1.5 mM (M-1, Q1, M23L)rONC [U-15N; U-13C]	50mM phosphate buffer pH4.1, 90% H2O, 10% D2O	0.3	4.1	ambient	310
3	3D_13C-separated_NOESY	1.5 mM (M-1, Q1, M23L)rONC [U-15N; U-13C]	50mM phosphate buffer pH4.1, 90% H2O, 10% D2O	0.3	4.1	ambient	310
4	2D TOCSY	1.5 mM (M-1, Q1, M23L)rONC [U-15N; U-13C]	50mM phosphate buffer pH4.1, 90% H2O, 10% D2O	0.3	4.1	ambient	310
5	2D NOESY	1.5 mM (M-1, Q1, M23L)rONC [U-15N; U-13C]	50mM phosphate buffer pH4.1, 90% H2O, 10% D2O	0.3	4.1	ambient	310

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

NMR Refinement
Method	Details	Software
simulated annealing, matrix relaxation, torsion angle dymanics	the structures are based on a total of 1802 restraints, 1550 are NOE-derived distance constraints, 4 disulfide bonds, 150 dihedral angle restraints, 98 distance restraints from hydrogen bonds.	ARIA

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	20
Representative Model	1 (minimized average structure)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	ARIA	1.2	Nilges
2	structure solution	CNS	1.1	Brunger
3	refinement	CNS	1.1	Brunger