1NA2

Solution structure of the p2b hairpin from human telomerase RNA

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	1mM human telomerase RNA p2b hairpin U-15N,13C labeled, unlabeled.	100% D2O, 200mM KCl, 0.2% NaN3, 50uM EDTA, 10mM Na phosphate, pH=6.3	200 mM KCl	6.3	1 atm	293
2	DQF-COSY	1mM human telomerase RNA p2b hairpin U-15N,13C labeled, unlabeled.	100% D2O, 200mM KCl, 0.2% NaN3, 50uM EDTA, 10mM Na phosphate, pH=6.3	200 mM KCl	6.3	1 atm	293
3	3D_13C-separated_NOESY	1mM human telomerase RNA p2b hairpin U-15N,13C labeled, unlabeled.	100% D2O, 200mM KCl, 0.2% NaN3, 50uM EDTA, 10mM Na phosphate, pH=6.3	200 mM KCl	6.3	1 atm	293
4	3D 13C NOESY-HMQC	1mM human telomerase RNA p2b hairpin U-15N,13C labeled, unlabeled.	100% D2O, 200mM KCl, 0.2% NaN3, 50uM EDTA, 10mM Na phosphate, pH=6.3	200 mM KCl	6.3	1 atm	293
5	2D NOESY	1mM human telomerase RNA p2b hairpin U-15N,13C labeled, unlabeled.	95% H2O, 5% D2O, 200mM KCl, 0.2% NaN3, 50uM EDTA, 10mM Na phosphate, pH=6.3	200 mM KCl	6.3	1 atm	278

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

NMR Refinement
Method	Details	Software
simulated annealing	266 intranucleotide NOEs, 318 internucleotide NOEs, 117 dihedral angles, 29 hydrogen bonds, 24 RDCs	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with acceptable covalent geometry,structures with the least restraint violations,structures with the lowest energy
Conformers Calculated Total Number	200
Conformers Submitted Total Number	18
Representative Model	1 (fewest violations,lowest energy)

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