1Q75 | pdb_00001q75

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY (1,1echo and watergate)	1mM unlabeled RNA, 10mM sodium phosphate buffer, pH 6.3, 200mM KCl, 50uM EDTA, 0.2% sodium azide, 95% H2O,5% D2O	95% H2O/5% D2O	200mM KCl	6.3	ambient	283
2	2D 15N-HMQC, 2D 15N-CPMG-NOESY, 2D JNN-HNN-COSY	1mM 13C,15N-labeled RNA, 10mM sodium phosphate buffer, pH 6.3, 200mM KCl, 50uM EDTA, 0.2% sodium azide, 95% H2O,5% D2O	95% H2O/5% D2O	200mM KCl	6.3	ambient	283
3	2D NOESY, 2D TOCSY	1mM unlabeled RNA, 10mM sodium phosphate buffer, pH 6.3, 200mM KCl, 50uM EDTA, 0.2% sodium azide	100% D2O	200mM KCl	6.3	ambient	293
4	31P-spin echo difference CT HSQC	1mM 13C,15N-labeled RNA, 10mM sodium phosphate buffer, pH 6.3, 200mM KCl, 50uM EDTA, 0.2% sodium azide	100% D2O	200mM KCl	6.3	ambient	293
5	3D 13C-NOESY HMQC, 2D 13C-HMQC,2D HCCH COSY, 3D HCCH TOCSY	1mM 13C,15N-labeled RNA, 10mM sodium phosphate buffer, pH 6.3, 200mM KCl, 50uM EDTA, 0.2% sodium azide	100% D2O	200mM KCl	6.3	ambient	293
6	CT-CE-HSQC	1mM 13C,15N-labeled RNA, 10mM sodium phosphate buffer, pH 6.3, 200mM KCl, 50uM EDTA, 0.2% sodium azide	100% D2O	200mM KCl	6.3	ambient	293

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

NMR Refinement
Method	Details	Software
simulated annealing	Structures are based on 283 NOE-derived distance constraints, 86 dihedral angle restraints, 16 distance restraints from hydrogen bonds, and 14 H-C residual dipolar couplings.	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	200
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Additional NMR Experimental Information
Details	CT-CE-HSQC was used for determining residual dipolar couplings

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.