2MEQ

Structure of Helix 69 from Escherichia coli 23S Ribosomal RNA

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-13C NATURAL ABUNDANCE HMQC	1.0 mM RNA (5'-P(GP*GP*CP*CP*GP*UP*AP*AP*CP*UP*AP*UP*AP*AP*CP*GP*GP*UP*C)-3'), 10 mM Potassium Phosphate, 50 mM Potassium Chloride, 0.1 mM EDTA	100% D2O	70	7.3	ambient	298.2
2	2D 1H-1H NOESY	1.0 mM RNA (5'-P(GP*GP*CP*CP*GP*UP*AP*AP*CP*UP*AP*UP*AP*AP*CP*GP*GP*UP*C)-3'), 10 mM Potassium Phosphate, 50 mM Potassium Chloride, 0.1 mM EDTA	100% D2O	70	7.3	ambient	298.2
3	2D DQF-COSY	1.0 mM RNA (5'-P(GP*GP*CP*CP*GP*UP*AP*AP*CP*UP*AP*UP*AP*AP*CP*GP*GP*UP*C)-3'), 10 mM Potassium Phosphate, 50 mM Potassium Chloride, 0.1 mM EDTA	100% D2O	70	7.3	ambient	298.2
4	3D 1H-1H-1H TOCSY-NOESY	1.0 mM RNA (5'-P(GP*GP*CP*CP*GP*UP*AP*AP*CP*UP*AP*UP*AP*AP*CP*GP*GP*UP*C)-3'), 10 mM Potassium Phosphate, 50 mM Potassium Chloride, 0.1 mM EDTA	100% D2O	70	7.3	ambient	298.2
5	2D 1H-31P HETCOR	1.0 mM RNA (5'-P(GP*GP*CP*CP*GP*UP*AP*AP*CP*UP*AP*UP*AP*AP*CP*GP*GP*UP*C)-3'), 10 mM Potassium Phosphate, 50 mM Potassium Chloride, 0.1 mM EDTA	100% D2O	70	7.3	ambient	298.2
6	1D 31P	1.0 mM RNA (5'-P(GP*GP*CP*CP*GP*UP*AP*AP*CP*UP*AP*UP*AP*AP*CP*GP*GP*UP*C)-3'), 10 mM Potassium Phosphate, 50 mM Potassium Chloride, 0.1 mM EDTA	100% D2O	70	7.3	ambient	298.2
7	2D 1H-1H NOESY	1.0 mM RNA (5'-P(GP*GP*CP*CP*GP*UP*AP*AP*CP*UP*AP*UP*AP*AP*CP*GP*GP*UP*C)-3'), 10 mM Potassium Phosphate, 50 mM Potassium Chloride, 0.1 mM EDTA	90% H2O/10% D2O	70	7.3	ambient	298.2
8	2D 1H-13C HSQC	1.0 mM [U-100% 13C; U-100% 15N] RNA (5'-P(GP*GP*CP*CP*GP*UP*AP*AP*CP*UP*AP*UP*AP*AP*CP*GP*GP*UP*C)-3'), 10 mM Potassium Phosphate, 50 mM Potassium Chloride, 0.1 mM EDTA	100% D2O	70	7.3	ambient	298.2
9	3D 1H-13C-1H HCCH-COSY	1.0 mM [U-100% 13C; U-100% 15N] RNA (5'-P(GP*GP*CP*CP*GP*UP*AP*AP*CP*UP*AP*UP*AP*AP*CP*GP*GP*UP*C)-3'), 10 mM Potassium Phosphate, 50 mM Potassium Chloride, 0.1 mM EDTA	100% D2O	70	7.3	ambient	298.2
10	3D 1H-13C-1H HCCH-TOCSY	1.0 mM [U-100% 13C; U-100% 15N] RNA (5'-P(GP*GP*CP*CP*GP*UP*AP*AP*CP*UP*AP*UP*AP*AP*CP*GP*GP*UP*C)-3'), 10 mM Potassium Phosphate, 50 mM Potassium Chloride, 0.1 mM EDTA	100% D2O	70	7.3	ambient	298.2
11	3D 1H-13C-13C HCCH-TOCSY	1.0 mM [U-100% 13C; U-100% 15N] RNA (5'-P(GP*GP*CP*CP*GP*UP*AP*AP*CP*UP*AP*UP*AP*AP*CP*GP*GP*UP*C)-3'), 10 mM Potassium Phosphate, 50 mM Potassium Chloride, 0.1 mM EDTA	100% D2O	70	7.3	ambient	298.2
12	3D 1H-1H-13C NOESY-HMQC	1.0 mM [U-100% 13C; U-100% 15N] RNA (5'-P(GP*GP*CP*CP*GP*UP*AP*AP*CP*UP*AP*UP*AP*AP*CP*GP*GP*UP*C)-3'), 10 mM Potassium Phosphate, 50 mM Potassium Chloride, 0.1 mM EDTA	100% D2O	70	7.3	ambient	298.2

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	700
2	Varian	Mercury	400

NMR Refinement
Method	Details	Software
simulated annealing, molecular dynamics, torsion angle dynamics		Sparky

NMR Ensemble Information
Conformer Selection Criteria	CONVERGED LOWEST ENERGY STRUCTURES
Conformers Calculated Total Number	100
Conformers Submitted Total Number	10
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	chemical shift assignment	Sparky		Goddard
2	data analysis	Sparky		Goddard
3	structure solution	CNS	1.2	Brunger, Adams, Clore, Gros, Nilges and Read
4	refinement	CNS	1.2	Brunger, Adams, Clore, Gros, Nilges and Read
5	collection	TopSpin		Bruker Biospin
6	processing	TopSpin		Bruker Biospin