1TBK

NMR structure of the VS ribozyme stem-loop V RNA in the absence of multivalent ions.

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D flip-back watergate NOESY	unlabeled SL5	10 mM d11-Tris, 50 mM NaCl, 0.2 mM EDTA, 0.05 mM NaN3, pH 7.0, 90% H2O and 10% D2O	50 mM NaCl	7.0	ambient	298
2	2D 1H-15N CPMG-NOESY	15N Sl5	10 mM d11-Tris, 50 mM NaCl, 0.2 mM EDTA, 0.05 mM NaN3, pH 7.0, 90% H2O and 10% D2O	50 mM NaCl	7.0	ambient	298
3	2D 1H-15N CPMG-NOESY	15N Sl5	10 mM d11-Tris, 50 mM NaCl, 0.2 mM EDTA, 0.05 mM NaN3, pH 7.0, 90% H2O and 10% D2O	50 mM NaCl	7.0	ambient	278
4	2D HNN-CSOSY	15N Sl5	10 mM d11-Tris, 50 mM NaCl, 0.2 mM EDTA, 0.05 mM NaN3, pH 7.0, 90% H2O and 10% D2O	50 mM NaCl	7.0	ambient	298
5	2D HNN-COSY	15N SL5	10 mM d11-Tris, 50 mM NaCl, 0.2 mM EDTA, 0.05 mM NaN3, pH 7.0, 100% D2O	50 mM NaCl	7.0	ambient	298
6	3D 13C-edited HMQC-NOESY	13C 15N Sl5	10 mM d11-Tris, 50 mM NaCl, 0.2 mM EDTA, 0.05 mM NaN3, pH 7.0, 100% D2O	50 mM NaCl	7.0	ambient	298
7	DQF-COSY	unlabeled SL5	10 mM d11-Tris, 50 mM NaCl, 0.2 mM EDTA, 0.05 mM NaN3, pH 7.0, 100% D2O	50 mM NaCl	7.0	ambient	298
8	3D HCCH E.COSY	13C 15N Sl5	10 mM d11-Tris, 50 mM NaCl, 0.2 mM EDTA, 0.05 mM NaN3, pH 7.0, 100% D2O	50 mM NaCl	7.0	ambient	298
9	2D 1H-13C CT-TROSY	13C 15N Sl5	10 mM d11-Tris, 50 mM NaCl, 0.2 mM EDTA, 0.05 mM NaN3, pH 7.0, 100% D2O	50 mM NaCl	7.0	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	600
2	Varian	INOVA	800

NMR Refinement
Method	Details	Software
simulated annealing molecular dynamics		X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	The submitted conformer models are the 10 structures with the lowest energy (MODEL 2 -- 11)
Conformers Calculated Total Number	61
Conformers Submitted Total Number	11
Representative Model	1 (minimized average structure)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	X-PLOR	NIH-2.0.6	Brunger
2	processing	NMRPipe	97.231.15.18	Delaglio
3	data analysis	NMRView	5.0.3	Johnson
4	data analysis	MOLMOL	2K.2	Koradi
5	data analysis	Curves	5.1	Lavery
6	refinement	X-PLOR	NIH-2.0.6	Brunger

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.