1N53

SOLUTION STRUCTURE OF B. SUBTILIS T BOX ANTITERMINATOR RNA

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	0.7 mM (U-15N, U-13C) or 1.2 mM (unlabeled) T box model RNA (AM1A); 10 mM sodium phosphate buffer pH 6.5, 0.01 mM EDTA	100% D2O	10 mM	6.5	ambient	295
2	2D TOCSY	0.7 mM (U-15N, U-13C) or 1.2 mM (unlabeled) T box model RNA (AM1A); 10 mM sodium phosphate buffer pH 6.5, 0.01 mM EDTA	100% D2O	10 mM	6.5	ambient	295
3	DQF-COSY	0.7 mM (U-15N, U-13C) or 1.2 mM (unlabeled) T box model RNA (AM1A); 10 mM sodium phosphate buffer pH 6.5, 0.01 mM EDTA	100% D2O	10 mM	6.5	ambient	295
4	3D_13C-separated_NOESY	0.7 mM (U-15N, U-13C) or 1.2 mM (unlabeled) T box model RNA (AM1A); 10 mM sodium phosphate buffer pH 6.5, 0.01 mM EDTA	100% D2O	10 mM	6.5	ambient	295
5	2D_HSQC	0.7 mM (U-15N, U-13C) or 1.2 mM (unlabeled) T box model RNA (AM1A); 10 mM sodium phosphate buffer pH 6.5, 0.01 mM EDTA	100% D2O	10 mM	6.5	ambient	295
6	2D_1H_31P_HETCOR	0.7 mM (U-15N, U-13C) or 1.2 mM (unlabeled) T box model RNA (AM1A); 10 mM sodium phosphate buffer pH 6.5, 0.01 mM EDTA	100% D2O	10 mM	6.5	ambient	295

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DRX	800
2	Bruker	DMX	400
3	Bruker	DMX	600

NMR Refinement
Method	Details	Software
distance geometry, simulated annealing, molecular dynamics	A total of 313 distance constraints and 59 dihedral angle constraints were used.	Felix

NMR Ensemble Information
Conformer Selection Criteria	The minimized average structure of the 9 lowest energy structures (all with favorable non-bond energy and the fewest number of constraint violations) is submitted.
Conformers Calculated Total Number	50
Conformers Submitted Total Number	1
Representative Model	1 (n/a)

Additional NMR Experimental Information
Details	This structure was determined using standard 2D and 3D homonuclear and heteronuclear NMR techniques.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	Felix	95,98
2	structure solution	X-PLOR	98.1	Brunger
3	processing	XwinNMR
4	refinement	X-PLOR	98.1	Brunger