2NC1

Solution structure of the delta-J-delta-K domain of EMCV IRES

SOLUTION NMR

---

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H NOESY	0.5 mM RNA (67-MER), 10 mM potassium phosphate, 10 mM sodium chloride	100% D2O	20	6.5	ambient	308
2	2D 1H-1H NOESY	0.5 mM [U-2H, {H1',H2',H2,H8}-Ade] RNA (67-MER), 10 mM potassium phosphate, 10 mM sodium chloride	100% D2O	20	6.5	ambient	308
3	2D 1H-1H NOESY	0.5 mM [U-2H]-Cyt, [U-2H]-Ura RNA (67-MER), 10 mM potassium phosphate, 10 mM sodium chloride	100% D2O	20	6.5	ambient	308
4	2D 1H-1H NOESY	0.5 mM [U-2H]-Gua, [U-2H]-Ura RNA (67-MER), 10 mM potassium phosphate, 10 mM sodium chloride	100% D2O	20	6.5	ambient	308
5	2D 1H-1H NOESY	0.5 mM RNA (67-MER), 10 mM potassium phosphate, 10 mM sodium chloride	90% H2O/10% D2O	20	6.5	ambient	283
6	2D 1H-1H NOESY	0.5 mM RNA (67-MER), 10 mM potassium phosphate, 10 mM sodium chloride	90% H2O/10% D2O	20	5.5	ambient	283
7	2D 1H-1H NOESY	0.5 mM [U-2H, {H1',H2',H2,H8}-Ade] RNA (67-MER), 10 mM potassium phosphate, 10 mM sodium chloride	90% H2O/10% D2O	20	6.5	ambient	283
8	2D 1H-1H NOESY	0.5 mM [U-2H, {H1',H2',H2,H8}-Ade] RNA (67-MER), 10 mM potassium phosphate, 10 mM sodium chloride	90% H2O/10% D2O	20	5.5	ambient	283

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	800
2	Bruker	AVANCE	700

NMR Refinement
Method	Details	Software
simulated annealing		CARA

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	1000
Conformers Submitted Total Number	10
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	chemical shift assignment	CARA		Keller and Wuthrich
2	structure solution	CYANA		Guntert, Mumenthaler and Wuthrich
3	refinement	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore