SOLUTION NMR Experimental Data


Experimental Details
Sample Conditions
Sample Contents1.5 mM DNA; Phosphate buffer (38 mM NaCl, 38 mM K3PO4)
Solvent90% H2O/10% D2O
Ionic Strength152 mM of monovalent cations
pH7.0
Pressureambient
Temperature (K)283
Experiment(s):2D NOESY
Sample Contents1.5 mM DNA; Phosphate buffer (38 mM NaCl, 38 mM K3PO4)
Solvent100% D2O
Ionic Strength152 mM of monovalent cations
pH7.0
Pressureambient
Temperature (K)300
Experiment(s):2D NOESY, E-COSY, HSQC
Spectrometer Information
Manufacturer Model Field Strength
Varian INOVA 500.0
NMR Refinement
Method Simulated Annealing, Restrained Molecular Dynamics, Iterative Relaxation Matrix Analysis
Details The structures are based on a total of 514 restraints, 285 are NOE-derived distance constraints, 175 dihedral angle restraints, 54 distance restraints from hydrogen bonds. The NOE-derived distance constraints were derived from 2D-NOESY spectra (mix. times 50, 75, 100 and 150 ms), using the Iterative Relaxation Matrix Analysis procedure. The final structures were derived by averaging coordinates of 100 structures obtained from IRMA cycles and subsequent 350 ps trajectory of restrained molecular dynamics and energy minimisation. R factor value: 0.41 +/- 0.01; R(1/6) value: 0.0045 +/- 0.0001; RMSD value: 1.22 +/- 0.51; The R and R(1/6) - factors are defined: R = SUM{|I(OBS) - I(CALC)|} / SUM{|I(OBS)|} R(1/6)=SQR(SUM{|I(OBS)^(1/6) - I(CALC)^(1/6)|}^2) / SUM{I(OBS)^(1/6)} Where I(OBS) and I(CALC) are the observed and the calculated NOE intensites.
NMR Ensemble Information
Conformer Selection Criteria structures with the lowest energy
Conformers Calculated Total Number 350
Conformers Submitted Total Number 30
Representative Model Choice Rationale
1 n/a
Additional NMR Experimental Information
1 This structure was determined using standard 2D homonuclear and heteronuclear techniques
Computation: NMR Software
# Classification Software Name Author
1 refinement version: 98.0 DISCOVER MSI INSIGHT II package
2 iterative matrix relaxation version: 98.0 IRMA MSI INSIGHT II package
3 processing version: 98.0 FELIX MSI INSIGHT II package
4 processing version: 6.1B VNMR Varian