1EFS

CONFORMATION OF A DNA-RNA HYBRID

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	1.2mM each strand; 150mM NaCl, 0.1 mM EDTA, pH 7, 90% H2O,10% D2O	90% H2O/10% D2O	80 mM NaCl	7.0	ambient	278
2	2D NOESY	1.2mM each strand; 150mM NaCl, 0.1 mM EDTA, pH 7	100% D2O	80 mM NaCl	7.0	ambient	291
3	DQF-COSY	1.2mM each strand; 150mM NaCl, 0.1 mM EDTA, pH 7	100% D2O
4	Reverse 1H-31P COSY	1.2mM each strand; 150mM NaCl, 0.1 mM EDTA, pH 7	100% D2O
5	1H-13C HSQC	1.2mM each strand; 150mM NaCl, 0.1 mM EDTA, pH 7	100% D2O

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	500

NMR Refinement
Method	Details	Software
molecular mechanics distance geometry matrix relaxation		VNMR

NMR Ensemble Information
Conformer Selection Criteria	back calculated data agree with experimental NOESY spectrum, structures with the least restraint violations, structures with the lowest energy
Conformers Calculated Total Number	10
Conformers Submitted Total Number	10
Representative Model	3 (closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1b
2	data analysis	Felix	95
3	structure solution	JUMNA	10	LAVERY, R.
4	refinement	IRMA	95