1Q75

Solution structure of the dyskeratosis congenita mutant P2b hairpin from human telomerase RNA

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

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	2.6	Bruker
2	processing	XwinNMR	2.6	Bruker
3	data analysis	AURELIA	3.108	Brunger
4	structure solution	X-PLOR	3.851	NIH
5	refinement	X-PLOR	3.851	NIH

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 R01GM133198.