1JUR | pdb_00001jur

Solution Structure of Helix III in Xenopus Oocyte 5S rRNA.

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	2mM Helix III hairpin; 5mM Cacodylate buffer (pH 6.5); 100 mM KCl	90% H2O/10% D2O	100 mM KCl	6.5	ambient	10
2	2D NOESY	2mM Helix III hairpin; 5mM Cacodylate buffer (pH 6.5); 100 mM KCl	100% D2O	100 mM KCl	6.5	ambient	30
3	DQF-COSY	2mM Helix III hairpin; 5mM Cacodylate buffer (pH 6.5); 100 mM KCl	100% D2O	100 mM KCl	6.5	ambient	30
4	2D_13C_separated_HMQC	2mM Helix III hairpin; 5mM Cacodylate buffer (pH 6.5); 100 mM KCl	100% D2O	100 mM KCl	6.5	ambient	30
5	2D_31P_separated_COSY	2mM Helix III hairpin; 5mM Cacodylate buffer (pH 6.5); 100 mM KCl	100% D2O	100 mM KCl	6.5	ambient	30

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	UNITY	500
2	Varian	UNITYPLUS	600
3	Varian	INOVA	800
4	GE	OMEGA	500

NMR Refinement
Method	Details	Software
torsion angle dynamics	In addition to the experimentally derived distance constraints and dihedral angle constraints, the structures were computed using 22 non-experimental constraints to ensure Watson-Crick Base pairing and tetraloop formation.	VNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with acceptable covalent geometry,structures with favorable non-bond energy,structures with the lowest energy
Conformers Calculated Total Number	30
Conformers Submitted Total Number	9
Representative Model	1 (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	collection	VNMR		Varian
2	processing	Felix	95	Biosym
3	structure solution	X-PLOR	3.851	Brunger
4	refinement	X-PLOR	3.851	Brunger