Experiment: 1F7G

SOLUTION STRUCTURE OF THE RNASE P RNA (M1 RNA) P4 STEM C70U MUTANT OLIGORIBONUCLEOTIDE, ENSEMBLE OF 17 STRUCTURES

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	2 mM P4m RNA; 100 mM sodium chloride; 10 mM phosphate buffer; 90% H2O, 10% D2O	90% H2O/10% D2O	100 mM Na	6.5	ambient	288
2	2D NOESY	2 mM P4m RNA; 100 mM sodium chloride; 10 mM phosphate buffer; 99.96% D2O	99.96% D2O	100 mM Na	6.5	ambient	288
3	2D NOESY	2 mM P4m RNA; 100 mM sodium chloride; 10 mM magnesium chloride; 10 mM phosphate buffer; 90% H2O, 10% D2O	90% H2O/10% D2O	100 mM Na, 10 mM Mg	6.5	ambient	288
4	2D NOESY	2 mM P4m RNA; 100 mM sodium chloride; 3 mM hexammine cobalt chloride; 10 mM phosphate buffer; 90% H2O, 10% D2O	90% H2O/10% D2O	100 mM Na, 3 mM Co(NH3)6	6.5	ambient	288
5	DQF-COSY	2 mM P4m RNA; 100 mM sodium chloride; 10 mM phosphate buffer; 99.96% D2O	99.96% D2O	100 mM Na	6.5	ambient	288
6	31P-1H-COSY	2 mM P4m RNA; 100 mM sodium chloride; 10 mM phosphate buffer; 99.96% D2O	99.96% D2O	100 mM Na	6.5	ambient	288
7	13C-1H-HMQC	2 mM P4m RNA; 100 mM sodium chloride; 10 mM phosphate buffer; 99.96% D2O	99.96% D2O	100 mM Na	6.5	ambient	288

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

NMR Refinement
Method	Details	Software
restrained molecular dynamics; simulated annealing	The structures are based on a total of 268 NOE derived distance constraints, 171 dihedral restraints and 49 distance restraints from hydrogen bonds. The 17 structures with lowest NOE and dihedral angle violation energies are presented	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the least restraint violations
Conformers Calculated Total Number	50
Conformers Submitted Total Number	17
Representative Model	5 (closest to the average)

Additional NMR Experimental Information
Details	This structure was determined using standard 2D homonuclear techniques and 13C and 31P heteronuclear techniques at natural abundance

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	3.1	Bruker
2	processing	Felix	95	MSI
3	structure solution	X-PLOR	3.841	Brunger
4	refinement	X-PLOR	3.841	Brunger