1U64

The Solution Structure of d(G3T4G4)2


SOLUTION NMR
NMR Experiment
ExperimentTypeSample ContentsSolventIonic StrengthpHPressureTemperature (K)Spectrometer
12D NOESY4mM dG3T4G4 per strand; 90% H2O, 10% D2O, 15mM KCl; pH 5.590% H2O/10% D2O15mM KCl5.5ambient278
22D NOESY4mM dG3T4G4 per strand; 90% H2O, 10% D2O, 15mM KCl; pH 5.590% H2O/10% D2O15mM KCl5.5ambient298
3PE-COSY4mM dG3T4G4 per strand; 90% H2O, 10% D2O, 15mM KCl; pH 5.590% H2O/10% D2O15mM KCl5.5ambient298
42D TOCSY4mM dG3T4G4 per strand; 90% H2O, 10% D2O, 15mM KCl; pH 5.590% H2O/10% D2O15mM KCl5.5ambient298
NMR Spectrometer Information
SpectrometerManufacturerModelField Strength
1VarianINOVA600
NMR Refinement
MethodDetailsSoftware
simulated annealing, energy minimization414 NOE-derived distance restraints associated with the nonexchangeable and exchangeable protons; 24 hydrogen-bond restraints; 66 torsion angle restraints for sugar moieties. For each of five different initial structures ten simulated annealing calculations at 700 K with NMR restraints using a generalized Born (GB) implicit solvation model were performed for 60 ps. The resulting structures were subjected to energy minimizationVNMR
NMR Ensemble Information
Conformer Selection Criteriastructures with the least restraint violations, structures with the lowest energy
Conformers Calculated Total Number50
Conformers Submitted Total Number8
Representative Model5 (fewest violations, lowest energy)
Additional NMR Experimental Information
DetailsThis structure was determined using standard 2D homonuclear techniques.
Computation: NMR Software
#ClassificationVersionSoftware NameAuthor
1collectionVNMR6.1BVarian
2processingFELIX2000Accelerys
3refinementAMBER7Kollman, at all