Experiment: 1Q9P

Solution structure of the mature HIV-1 protease monomer

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_13C-separated_NOESY	0.5mM HIV-1 protease u-15N, 13C, 20mM phosphate buffer, 95% H2O, 5%D2O	95% H2O/5% D2O	20mM	5.8	ambient	293
2	3D_15N-separated_NOESY	0.5mM HIV-1 protease u-15N, 13C, 20mM phosphate buffer, 95% H2O, 5%D2O	95% H2O/5% D2O	20mM	5.8	ambient	293

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

NMR Refinement
Method	Details	Software
simulated annealing	The structures are based on a total of 862 restraints, 752 are NOE-derived distance constraints, 47 dihedral angle restraints,30 distance restraints from hydrogen bonds, 63 dipolar coupling constraints.	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	2.6	Bruker
2	data analysis	NMRPipe		D.Garrett
3	structure solution	X-PLOR	1.0.6	C.D.Schwieters, J.J.Kuszewski, N.Tjandra, and G.M.Clore
4	refinement	X-PLOR	1.0.6	C.D.Schwieters, J.J.Kuszewski, N.Tjandra, and G.M.Clore