GRAMICIDIN A: LEFT-HANDED PARALLEL DOUBLE HELICAL FORM IN METHANOL IN THE PRESENCE OF CACL2, NMR, 20 STRUCTURES
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | TOCSY | 20 mM Gramicidin D, 1 mM CaCl2 | methanol | ambient | 303 | |||
| 2 | NOESY | 20 mM Gramicidin D, 1 mM CaCl2 | methanol | ambient | 303 | |||
| 3 | DQF-COSY | 20 mM Gramicidin D, 1 mM CaCl2 | methanol | ambient | 303 | |||
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | AMX | 600 |
| 2 | JEOL | GX | 500 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| DGSA-distance geometry simulated annealing | X-PLOR | |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the lowest energy |
| Conformers Calculated Total Number | 187 |
| Conformers Submitted Total Number | 20 |
| Representative Model | 1 (n/a) |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | refinement | X-PLOR | 3.1 | BRUNGER |
| 2 | structure calculation | X-PLOR | 3.1 | BRUNGER |
