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Solution structure for the unique dimeric 4:2 complex of a platinum(II)-based tripod bound to a hybrid-1 human telomeric G-quadruplex
NMR Experiment Experiment Type Sample Contents Solvent Ionic Strength pH Pressure Temperature (K) Spectrometer 1 2D 1H-1H NOESY 1 mM G-quadruplex DNA (26-MER), 3 mM Pt-tripod, 25 mM potassium phosphate, 70 mM potassium chloride 90% H2O/10% D2O 95 mM 7.0 AMBIENT mbar 298 Bruker AVANCE III 700 2 2D 1H-1H TOCSY 1 mM G-quadruplex DNA (26-MER), 3 mM Pt-tripod, 25 mM potassium phosphate, 70 mM potassium chloride 90% H2O/10% D2O 95 mM 7.0 AMBIENT mbar 298 Bruker AVANCE III 700 3 2D 1H-1H COSY 1 mM G-quadruplex DNA (26-MER), 3 mM Pt-tripod, 25 mM potassium phosphate, 70 mM potassium chloride 90% H2O/10% D2O 95 mM 7.0 AMBIENT mbar 298 Bruker AVANCE III 700 4 2D 1H-1H NOESY 1 mM G-quadruplex DNA (26-MER), 3 mM Pt-tripod, 25 mM potassium phosphate, 70 mM potassium chloride 90% H2O/10% D2O 95 mM 7.0 AMBIENT mbar 288 Bruker AVANCE III 600 5 2D 1H-1H TOCSY 1 mM G-quadruplex DNA (26-MER), 3 mM Pt-tripod, 25 mM potassium phosphate, 70 mM potassium chloride 90% H2O/10% D2O 95 mM 7.0 AMBIENT mbar 288 Bruker AVANCE III 600 6 2D 1H-1H COSY 1 mM G-quadruplex DNA (26-MER), 3 mM Pt-tripod, 25 mM potassium phosphate, 70 mM potassium chloride 90% H2O/10% D2O 95 mM 7.0 AMBIENT mbar 288 Bruker AVANCE III 600 7 2D 1H-15N HSQC 1 mM 15N Thymine G-quadruplex DNA (26-MER), 3 mM Pt-tripod, 25 mM potassium phosphate, 70 mM potassium chloride 90% H2O/10% D2O 95 mM 7.0 AMBIENT mbar 278 Bruker AVANCE III 600
NMR Spectrometer Information Spectrometer Manufacturer Model Field Strength 1 Bruker AVANCE III 600 2 Bruker AVANCE III 700
NMR Refinement Method Details Software simulated annealing X-PLOR DGSA-distance geometry simulated annealing Discover molecular dynamics Sparky
NMR Ensemble Information Conformer Selection Criteria structures with the lowest energy Conformers Calculated Total Number 100 Conformers Submitted Total Number 10 Representative Model 1 (lowest energy)
Computation: NMR Software # Classification Version Software Name Author 1 refinement X-PLOR Brunger 2 structure calculation Discover Accelrys Software Inc. 3 chemical shift assignment Sparky Goddard 4 peak picking Sparky Goddard 5 processing TopSpin Bruker Biospin