NMR structural characterization of the reduction of chromium(VI) to chromium(III) by cytochrome c7
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D NOESY | 2 mM cytochrome c7-chromium(III) | 90% H2O, 10% D2O; 100 mM phosphate buffer | 100 mM phosphate buffer | 6.5 | 1 atm | 298 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | DRX | 700 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| simulated annealing in torsion angle space | DYANA | |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with best target function |
| Conformers Calculated Total Number | 500 |
| Conformers Submitted Total Number | 35 |
| Representative Model | 1 (fewest violations) |
| Additional NMR Experimental Information | |
|---|---|
| Details | The protein solution was titrated by addition of increasing amounts of the (CrO4)2- solution directly in the NMR tube. The (CrO4)2- solution was kept under argon atmosphere to avoid the presence of oxygen in the NMR tube. |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | structure solution | DYANA | 1.5 | Guentert |
| 2 | refinement | DYANA | 1.5 | Guentert |
