An unexpected mode of small molecule DNA binding provides the structural basis for DNA cleavage by the potent antiproliferative agent (-)-lomaiviticin A
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | 2D DQF-COSY | 1.1 uM DNA (5'-D(*(DG5)P*CP*TP*AP*TP*AP*GP*(DC3)*(DG5)P*CP*TP*AP*TP*AP*GP*(DC3))-3'), 1.1 uM lomaiviticin A | 100% D2O | 24 | 7.5 | ambient | 297 | |
2 | 2D 1H-13C HSQC | 1.1 uM DNA (5'-D(*(DG5)P*CP*TP*AP*TP*AP*GP*(DC3)*(DG5)P*CP*TP*AP*TP*AP*GP*(DC3))-3'), 1.1 uM lomaiviticin A | 100% D2O | 24 | 7.5 | ambient | 297 | |
3 | 2D 1H-1H NOESY | 1.1 uM DNA (5'-D(*(DG5)P*CP*TP*AP*TP*AP*GP*(DC3)*(DG5)P*CP*TP*AP*TP*AP*GP*(DC3))-3'), 1.1 uM lomaiviticin A | 100% D2O | 24 | 7.5 | ambient | 297 | |
4 | 2D 1H-1H NOESY | 1.1 uM DNA (5'-D(*(DG5)P*CP*TP*AP*TP*AP*GP*(DC3)*(DG5)P*CP*TP*AP*TP*AP*GP*(DC3))-3'), 1.1 uM lomaiviticin A | 100% D2O | 24 | 7.5 | ambient | 297 | |
5 | 2D 1H-1H NOESY | 1.1 uM DNA (5'-D(*(DG5)P*CP*TP*AP*TP*AP*GP*(DC3)*(DG5)P*CP*TP*AP*TP*AP*GP*(DC3))-3'), 1.1 uM lomaiviticin A | 90% H2O/10% D2O | 24 | 7.5 | ambient | 297 | |
6 | 2D DQF-COSY | 1.1 uM DNA (5'-D(*(DG5)P*CP*TP*AP*TP*AP*GP*(DC3)*(DG5)P*CP*TP*AP*TP*AP*GP*(DC3))-3'), 1.1 uM lomaiviticin A | 90% H2O/10% D2O | 24 | 7.5 | ambient | 297 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Agilent | Direct Drive | 800 |
NMR Refinement | ||
---|---|---|
Method | Details | Software |
molecular dynamics | Amber |
NMR Ensemble Information | |
---|---|
Conformer Selection Criteria | structures with the least restraint violations |
Conformers Calculated Total Number | 1000 |
Conformers Submitted Total Number | 6 |
Representative Model | 1 (minimized average structure) |
Computation: NMR Software | ||||
---|---|---|---|---|
# | Classification | Version | Software Name | Author |
1 | structure calculation | Amber | 14 | Case, Darden, Cheatham, III, Simmerling, Wang, Duke, Luo, and Kollman |
2 | refinement | Amber | 14 | Case, Darden, Cheatham, III, Simmerling, Wang, Duke, Luo, and Kollman |