2LX1

Major Conformation of the Internal Loop 5'GAGU/3'UGAG

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-13C HSQC	1.5 mM RNA (5'-R(*GP*AP*CP*GP*AP*GP*UP*GP*UP*CP*A)-3'), 80 mM sodium chloride, 10 mM sodium phosphate, 0.05 mM EDTA	95% H2O/5% D2O	0.1	6.1	ambient	274
2	2D 1H-15N HSQC	1.5 mM RNA (5'-R(*GP*AP*CP*GP*AP*GP*UP*GP*UP*CP*A)-3'), 80 mM sodium chloride, 10 mM sodium phosphate, 0.05 mM EDTA	95% H2O/5% D2O	0.1	6.1	ambient	274
3	2D 1H-1H TOCSY 30 ms	1.5 mM RNA (5'-R(*GP*AP*CP*GP*AP*GP*UP*GP*UP*CP*A)-3'), 80 mM sodium chloride, 10 mM sodium phosphate, 0.05 mM EDTA	95% H2O/5% D2O	0.1	6.1	ambient	274
4	2D 1H-1H NOESY 75 ms	1.5 mM RNA (5'-R(*GP*AP*CP*GP*AP*GP*UP*GP*UP*CP*A)-3'), 80 mM sodium chloride, 10 mM sodium phosphate, 0.05 mM EDTA	95% H2O/5% D2O	0.1	6.1	ambient	274
5	2D 1H-1H NOESY 150 ms	1.5 mM RNA (5'-R(*GP*AP*CP*GP*AP*GP*UP*GP*UP*CP*A)-3'), 80 mM sodium chloride, 10 mM sodium phosphate, 0.05 mM EDTA	95% H2O/5% D2O	0.1	6.1	ambient	274
6	2D 1H-13C HSQC	1.5 mM RNA (5'-R(*GP*AP*CP*GP*AP*GP*UP*GP*UP*CP*A)-3'), 80 mM sodium chloride, 10 mM sodium phosphate, 0.05 mM EDTA	100% D2O	0.1	6.1	ambient	274
7	2D 1H-1H TOCSY 14ms	1.5 mM RNA (5'-R(*GP*AP*CP*GP*AP*GP*UP*GP*UP*CP*A)-3'), 80 mM sodium chloride, 10 mM sodium phosphate, 0.05 mM EDTA	100% D2O	0.1	6.1	ambient	274
8	2D 1H-1H TOCSY 36 ms	1.5 mM RNA (5'-R(*GP*AP*CP*GP*AP*GP*UP*GP*UP*CP*A)-3'), 80 mM sodium chloride, 10 mM sodium phosphate, 0.05 mM EDTA	100% D2O	0.1	6.1	ambient	274
9	2D 1H-1H NOESY 75 ms	1.5 mM RNA (5'-R(*GP*AP*CP*GP*AP*GP*UP*GP*UP*CP*A)-3'), 80 mM sodium chloride, 10 mM sodium phosphate, 0.05 mM EDTA	100% D2O	0.1	6.1	ambient	274
10	2D 1H-1H NOESY 175 ms	1.5 mM RNA (5'-R(*GP*AP*CP*GP*AP*GP*UP*GP*UP*CP*A)-3'), 80 mM sodium chloride, 10 mM sodium phosphate, 0.05 mM EDTA	100% D2O	0.1	6.1	ambient	274
11	2D 1H-1H NOESY 400 ms	1.5 mM RNA (5'-R(*GP*AP*CP*GP*AP*GP*UP*GP*UP*CP*A)-3'), 80 mM sodium chloride, 10 mM sodium phosphate, 0.05 mM EDTA	100% D2O	0.1	6.1	ambient	274
12	2D 1H-31P HETCOR	1.5 mM RNA (5'-R(*GP*AP*CP*GP*AP*GP*UP*GP*UP*CP*A)-3'), 80 mM sodium chloride, 10 mM sodium phosphate, 0.05 mM EDTA	100% D2O	0.1	6.1	ambient	274

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

NMR Refinement
Method	Details	Software
simulated annealing		Sparky

NMR Ensemble Information
Conformer Selection Criteria	structures with the least restraint violations
Conformers Calculated Total Number	600
Conformers Submitted Total Number	19
Representative Model	1 (lowest restraint energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	chemical shift assignment	Sparky	3.12	Goddard
2	data analysis	Sparky	3.12	Goddard
3	processing	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
4	structure solution	Amber	10	Case, Darden, Cheatham, III, Simmerling, Wang, Duke, Luo, ... and Kollman
5	refinement	Amber	10	Case, Darden, Cheatham, III, Simmerling, Wang, Duke, Luo, ... and Kollman