1SY4

Refined solution structure of the S. cerevisiae U6 INTRAMOLECULAR STEM LOOP (ISL) RNA USING RESIDUAL DIPOLAR COUPLINGS (RDCS)

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	0.8-1.4 MM RNA, 50 MM NaCl, pH 7.0	D2O	50 mM NaCl	7.0	ambient	303
2	2D TOCSY	0.8-1.4 MM RNA, 50 MM NaCl, pH 7.0	D2O	50 mM NaCl	7.0	ambient	303
3	2D 1H-13C HSQC	0.8-1.4 MM RNA, 50 MM NaCl, pH 7.0	D2O	50 mM NaCl	7.0	ambient	303
4	2D NOESY	0.8-1.4 MM RNA, 50 MM NaCl, pH 7.0	H2O	50 mM NaCl	7.0	ambient	285

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DMX	750
2	Bruker	DMX	600
3	Bruker	DMX

NMR Refinement
Method	Details	Software
XPLOR-NIH 2.0.6 structure calculation which incorporates Residual dipolar couplings		CNS

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	12
Representative Model	1 (lowest energy)

Additional NMR Experimental Information
Details	T7 RNA transcript from synthetic DNA (sequence from Saccharomyces cerevisiae)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	CNS	1.1	Brunger, A. T. et. al.
2	refinement	XPLORNIH	2.0.6.	Clore, G.M. et. al.
3	collection	XwinNMR	2.6	Bruker Biospin
4	data analysis	Sparky	3.0	Goddard, T. D. etl. al.