2LDT

The 912-888 alternate conformation for helix 27 of E.coli 16S rRNA

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H TOCSY	0.8 - 1.6 mM [U-99% 13C; U-99% 15N] RNA (31-MER)	90% H2O/10% D2O	0.05	6.4	ambient	293
2	2D DQF-COSY	0.8 - 1.6 mM [U-99% 13C; U-99% 15N] RNA (31-MER)	90% H2O/10% D2O	0.05	6.4	ambient	293
3	2D 1H-15N HSQC	0.8 - 1.6 mM [U-99% 13C; U-99% 15N] RNA (31-MER)	90% H2O/10% D2O	0.05	6.4	ambient	293
4	2D 1H-13C HSQC	0.8 - 1.6 mM [U-99% 13C; U-99% 15N] RNA (31-MER)	90% H2O/10% D2O	0.05	6.4	ambient	293
5	2D 1H-1H NOESY	0.8 - 1.6 mM [U-99% 13C; U-99% 15N] RNA (31-MER)	90% H2O/10% D2O	0.05	6.4	ambient	293

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

NMR Refinement
Method	Details	Software
torsion angle dynamics		NMRPipe

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	50
Conformers Submitted Total Number	13
Representative Model	1 (closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
2	refinement	XPLOR-NIH		Schwieters, Kuszewski, Tjandra and Clore