Structure of an antiparallel (2+2) G-quadruplex formed by human telomeric repeats in Na+ solution (with G22-to-BrG substitution)
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D 1H-1H NOESY | 1-2 mM DNA (27-MER) | 100% D2O | 100 mM NA+ | 7.0 | ambient | 298 | |
| 2 | 2D 1H-1H JR NOESY | 1-2 mM DNA (27-MER) | 90% H2O/10% D2O | 100 mM NA+ | 7.0 | ambient | 298 | |
| 3 | 2D 1H-1H COSY | 1-2 mM DNA (27-MER) | 100% D2O | 100 mM NA+ | 7.0 | ambient | 298 | |
| 4 | 2D 1H-1H TOCSY | 1-2 mM DNA (27-MER) | 100% D2O | 100 mM NA+ | 7.0 | ambient | 298 | |
| 5 | 2D 1H-13C HSQC | 1-2 mM DNA (27-MER) | 100% D2O | 100 mM NA+ | 7.0 | ambient | 298 | |
| 6 | 2D 1H-13C JR HMBC | 1-2 mM DNA (27-MER) | 90% H2O/10% D2O | 100 mM NA+ | 7.0 | ambient | 298 | |
| 7 | H-D EXCHANGE | 1-2 mM DNA (27-MER) | 90% H2O/10% D2O | 100 mM NA+ | 7.0 | ambient | 298 | |
| 8 | 15N-FILTERED | 0.5-2 mM [U-2% 15N] DNA (27-MER) | 90% H2O/10% D2O | 100 mM NA+ | 7.0 | ambient | 298 | |
| 9 | D-LABELED | 0.2-1 mM [U-100% 2H] DNA (27-MER) | 90% H2O/10% D2O | 100 mM NA+ | 7.0 | ambient | 298 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | AVANCE | 600 |
| 2 | Bruker | AVANCE | 700 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| DGSA-distance geometry simulated annealing, Distance-restrained molecular dynamics | TopSpin | |
| 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 | processing | TopSpin | 2.1 | Bruker Biospin |
| 2 | collection | TopSpin | 2.1 | Bruker Biospin |
| 3 | peak picking | Felix | 2007 | Felix NMR, Inc. |
| 4 | structure solution | X-PLOR NIH | 2.29 | Schwieters, Kuszewski, Tjandra and Clore |
| 5 | refinement | X-PLOR NIH | 2.29 | Schwieters, Kuszewski, Tjandra and Clore |
