2IDN | pdb_00002idn

NMR structure of a new modified Thrombin Binding Aptamer containing a 5'-5' inversion of polarity site

SOLUTION NMR

---

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	20 mM phosphate buffer K, 70 mM KCl, 0.2 mM EDTA, 90% H2O, 10% D2O	90% H2O/10% D2O		7	ambient	298
2	2D NOESY	20 mM phosphate buffer K, 70 mM KCl, 0.2 mM EDTA, 90% H2O, 10% D2O	90% H2O/10% D2O		7	ambient	278
3	1H-15N HSQC	20 mM phosphate buffer K, 70 mM KCl, 0.2 mM EDTA, 90% H2O, 10% D2O	90% H2O/10% D2O		7	ambient	278
4	2D TOCSY	20 mM phosphate buffer K, 70 mM KCl, 0.2 mM EDTA	D2O		7	ambient	298
5	PE-COSY	20 mM phosphate buffer K, 70 mM KCl, 0.2 mM EDTA	D2O		7	ambient	298
6	2D NOESY	20 mM phosphate buffer K, 70 mM KCl, 0.2 mM EDTA	D2O		7	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	Unity Inova	700
2	Varian	Unity Inova	500

NMR Refinement
Method	Details	Software
simulated annealing	the structures are based on a total of 288 restraints, 198 are NOE-derived distance constraints, 54 dihedral angle restraints, 36 distance restraints from hydrogen bonds.	Insight II

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	20
Conformers Submitted Total Number	7
Representative Model	1 (lowest energy)

Additional NMR Experimental Information
Details	This structure was determined using standard 2D homonuclear techniques, and by using a 1H-15N HSQC performed on the unlabeled molecule

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	data analysis	Insight II	2005	Accelrys
2	refinement	Discover		Accelrys