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NMR Solution Structure of a Parallel LNA Quadruplex
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
2D NOESY
1.80 mM, 5'-((TLN)P*(LCG)P*(LCG)P*(LCG)P*(TLN))-3', 10 mM KH2PO4, 70 mM KCl, 0.2 mM EDTA
H2O/D2O 9:1
7.0
ambient
300
2
2D NOESY
1.80 mM, 5'-((TLN)P*(LCG)P*(LCG)P*(LCG)P*(TLN))-3', 10 mM KH2PO4, 70 mM KCl, 0.2 mM EDTA
D2O
7.0
ambient
300
3
2D TOCSY
1.80 mM, 5'-((TLN)P*(LCG)P*(LCG)P*(LCG)P*(TLN))-3', 10 mM KH2PO4, 70 mM KCl, 0.2 mM EDTA
D2O
7.0
ambient
300
4
1H-31P 2D COSY
1.80 mM, 5'-((TLN)P*(LCG)P*(LCG)P*(LCG)P*(TLN))-3', 10 mM KH2PO4, 70 mM KCl, 0.2 mM EDTA
D2O
7.0
ambient
300
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Bruker
AMX
500
2
Varian
INOVA
750
3
Varian
INOVA
600
NMR Refinement
Method
Details
Software
torsion angle dynamics
292 (73 per strand) NOE-derived distance constraints, 48 hydrogen bonds constraints, 36 (9 per strand) dihedral angle restraints. The 20 structures with the lowest CYANA target functions were subjected energy minimization (with no angle constraints) using the conjugate gradient method and the CVFF force field
UXNMR
NMR Ensemble Information
Conformer Selection Criteria
target function
Conformers Calculated Total Number
20
Conformers Submitted Total Number
20
Representative Model
1 (lowest energy)
Additional NMR Experimental Information
Details
This structure was determined using standard 2D homonuclear techniques