1FEQ

NMR SOLUTION STRUCTURE OF THE ANTICODON OF TRNA(LYS3) WITH T6A MODIFICATION AT POSITION 37

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	1.2 mM RNA, 10 mM cacodylate buffer, pH 5.6, 0.1 mM EDTA	94% H2O, 6% D2O		5.6	1 atm	289

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	500

NMR Refinement
Method	Details	Software
global fold by distance geometry. Refinement by simulated annealing using the AMBER forcefield	272 restraints, 207 NOE-derived, 13 h-bond, 52 dihedral angle. Chi torsion was left unrestrained although likely anti for all residues.	Felix

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	50
Conformers Submitted Total Number	11
Representative Model	1 (minimized average structure of family a (struct 2-5))

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

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	data analysis	Felix	98	msi
2	refinement	Discover	98	msi