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Major G-quadruplex structure formed in human c-MYC promoter, a monomeric parallel-stranded quadruplex
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
2D NOESY
0.2-3mM DNA oligonucleotides, 25mM potassium-phosphate,70mM potassium-chloride,pH7.0 buffer
10% D2O/90% H2O
25mM potassium-phosphate,70mM potassium-chloride
7.0
ambient
298
2
2D NOESY
0.2-3mM DNA oligonucleotides, 25mM potassium-phosphate,70mM potassium-chloride,pH7.0 buffer
99.96% D2O
25mM potassium-phosphate,70mM potassium-chloride
7.0
ambient
298
3
2D TOCSY
0.2-3mM DNA oligonucleotides, 25mM potassium-phosphate,70mM potassium-chloride,pH7.0 buffer
99.96% D2O
25mM potassium-phosphate,70mM potassium-chloride
7.0
ambient
298
4
DQF-COSY
0.2-3mM DNA oligonucleotides, 25mM potassium-phosphate,70mM potassium-chloride,pH7.0 buffer
99.96% D2O
25mM potassium-phosphate,70mM potassium-chloride
7.0
ambient
298
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Bruker
AVANCE
600
NMR Refinement
Method
Details
Software
molecular dynamics
XwinNMR
NMR Ensemble Information
Conformer Selection Criteria
structures with the least restraint violations
Conformers Calculated Total Number
200
Conformers Submitted Total Number
20
Representative Model
1 (fewest violations)
Additional NMR Experimental Information
Details
Constraints for structure calculations were collected from standard homonuclear NMR experiments. Site-specific imino-assignments were obtained from 1D HMQC with presaturation. 2D NOESY in water used jump-and-return solvent suppression. The average RMSD is 0.880531.