1S2F

Average solution structure of a pseudo-5'-splice site from the negative regulator of splicing of Rous Sarcoma virus

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	RNA Residues 907-929 from NRS (NRS23)	10 mM Sodium Phosphate, 25 mM NaCl, pH 6.5	25 mM NaCl, 10 mM NaPi	6.5	ambient	298
2	3D_13C-separated_NOESY	RNA Residues 907-929 from NRS (NRS23)	10 mM Sodium Phosphate, 25 mM NaCl, pH 6.5	25 mM NaCl, 10 mM NaPi	6.5	ambient	298
3	HNN-COSY	RNA Residues 907-929 from NRS (NRS23)	10 mM Sodium Phosphate, 25 mM NaCl, pH 6.5	25 mM NaCl, 10 mM NaPi	6.5	ambient	298
4	DQF-COSY	RNA Residues 907-929 from NRS (NRS23)	10 mM Sodium Phosphate, 25 mM NaCl, pH 6.5	25 mM NaCl, 10 mM NaPi	6.5	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	500
2	Varian	INOVA	600
3	Varian	INOVA	800
4	Bruker	DRX	500

NMR Refinement
Method	Details	Software
Simulated annealing. Torsion angle dynamics in refinement.	100 structurews were calculated, the minimized average from the 15 lowest energy structures is presented. Constraints used: 423 distance, 63 torsion angle, 117 orientation (RDC). The DELPIC database was employed in the refinement as follows: torsion angle database active for all residues, base-base positional database active for residues 907-912, 914-916, and 921-929. DELPHIC database reference: Clore, G.M. Kuszewski, J. J. Am. Chem. Soc. 125: 1518-1525	Xplor-NIH

NMR Ensemble Information
Conformer Selection Criteria
Conformers Calculated Total Number
Conformers Submitted Total Number	1
Representative Model	1 (minimized average structure)

Additional NMR Experimental Information
Details	Exchangeable proton spectra collected at 15 Celsius

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	Xplor-NIH	xplor-nih-2.0.6	C.D. Schwieters, J.J. Kuszewski,N. Tjandra, and G.M. Clore
2	data analysis	NMRPipe	4.1	F. Delaglio, S. Grzesiek, G. Vuister, G. Zhu, J. Pfeifer, and A. Bax
3	collection	VNMR	6.1C	varian inc.
4	data analysis	NMRView	5.0.4	Johnson, B.A.