Experiment: 2LKR

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H NOESY	0.6-0.8 mM RNA (111-MER), 10 mM potassium phosphate, 2 mM magnesium chloride	90% H2O/10% D2O	12	7.0	ambient	283
2	2D 1H-15N TROSY-HMQC	0.3-0.5 mM [U-13C; U-15N]-Gua, [U-13C; U-15N]-Ura RNA (111-MER), 10 mM potassium phosphate, 2 mM magnesium chloride	90% H2O/10% D2O	12	7.0	ambient	283

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DMX	750
2	Bruker	DMX	700

NMR Refinement
Method	Details	Software
molecular dynamics	Low temperature restrained molecular dynamics of MC-Sym generated models	X-PLOR NIH

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	10
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR NIH	2.21	Schwieters, Kuszewski, Tjandra and Clore
2	chemical shift assignment	Sparky	3.114	Goddard
3	processing	TopSpin	2.1	Bruker Biospin
4	structure solution	MC-Sym	4.2.2	Parisien, Major

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.