1FC8

NMR SOLUTION STRUCTURE OF A CHIMERIC OLIGONUCLEOTIDE HAIRPIN R(GGAC)D(TTCG)2'F-A(GTCC)

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	0.5 mM Oligonucleotide hairpin; 90% H2O, 10% D2O	90% H2O/10% D2O	0.066	7.2	ambient	293
2	2D NOESY	0.5 mM Oligonucleotide hairpin; D2O	D2O	0.066	7.2	ambient	293
3	DQF-COSY	0.5 mM Oligonucleotide hairpin; D2O	D2O	0.066	7.2	ambient	293
4	2D 1H-13C HMQC	0.5 mM Oligonucleotide hairpin; D2O	D2O	0.066	7.2	ambient	293
5	2D 1H-31P HETCOR	0.5 mM Oligonucleotide hairpin; D2O	D2O	0.066	7.2	ambient	293
6	2D 1H-19F HETCOR	0.5 mM Oligonucleotide hairpin; D2O	D2O	0.066	7.2	ambient	293

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DRX	500
2	Bruker	DMX	400
3	Varian	UNITYPLUS	750

NMR Refinement
Method	Details	Software
Distance geometry, simulated annealing	SA at 15000K for 15 psec from random coordinates. Refinement from lower energy structure at 3000K fro 9 psec. 5 structures generated. Total of 305 restraints: 98 intraresidue NOE-derived distance constraints, 94 sequential NOE-derived distance constraints, 3 long range NOE-derived distance constraints, 15 distance restraints from hydrogen bonds, 91 dihedral angle restraints, 4 planarity constraints for base pairs	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	RMSD FROM AVERAGE LOWER THAN 0.7 ANGSTROM
Conformers Calculated Total Number	5
Conformers Submitted Total Number	5
Representative Model	3 (closest to the average)

Additional NMR Experimental Information
Details	This structure was determined using standard 2D homonuclear techniques.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	X-PLOR	3.843	BRUNGER
2	refinement	X-PLOR	3.843	BRUNGER