SOLUTION NMR Experimental Data


Experimental Details
Sample Conditions
Sample Contents10 mM sodium phosphate, 0.2 mM EDTA and 200 mM NaCl
Solvent90% H2O/10% D2O
Ionic Strengthn/a
pH7.0
Pressure1
Temperature (K)n/a
Experiment(s):2D NOESY
Sample Contents10 mM sodium phosphate, 0.2 mM EDTA and 200 mM NaCl
SolventD2O
Ionic Strengthn/a
pH7.0
Pressure1
Temperature (K)n/a
Experiment(s):2D NOESY, 2D TOCSY, DQF-COSY
Spectrometer Information
Manufacturer Model Field Strength
Varian UNITYPLUS 600.0
NMR Refinement
Method Relaxaxtion matrix refinement
Details After simulated annealing-restrained molecular dynamics 16 structures for the quadruplex were selected on the basis of proper covalent geometries, symmetries and low energies for relaxation matrix refinement using IRMA (Iterative Relxation Matrix Analysis) protocol in DISCOVER. The input data included NOEs from 80, 120, 200 and 300 ms NOESY spectra. Three to four sets of calculations were performed by choosing different reference peaks for intensity normalizations. The isotropic correlation time was optimized for best NOE fits, which yielded a value of 5.0 ns.Finally 10 convergent quadruplex structures were selected on the basis of R1-factor and symmetry
NMR Ensemble Information
Conformer Selection Criteria all calculated structures submitted
Conformers Calculated Total Number 10
Conformers Submitted Total Number 10
Representative Model Choice Rationale
1 closest to the average
Additional NMR Experimental Information
1 Temperatyre dependent 1D spectra. Temperature was varied between -5 and 50 C
Computation: NMR Software
# Classification Software Name Author
1 collection version: 6.1 VNMR Varian
2 processing version: 6.1 VNMR Varian
3 processing version: 230 and 97 FELIX BIOSYM
4 structure solution version: 3.1 DISCOVER BIOSYM
5 refinement version: 2.3 IRMA BIOSYM