SOLUTION STRUCTURE OF THE HISTIDINE-CONTAINING PHOSPHOTRANSFER DOMAIN OF ANAEROBIC SENSOR KINASE ARCB FROM ESCHERICHIA COLI.
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D NOESY | 1.5mM HPtArcB, 50mM KH2PO4-K2HPO4 (pH6.5 at 37deg), 50mM KCl, and 1mM dithiothreitol (DTT) in 99.8% D2O | 99.8% D2O | 100mM | 6.5 | ambient | 310 | |
| 2 | 3D_13C-separated_NOESY | 1.5mM HPtArcB, 50mM KH2PO4-K2HPO4 (pH6.5 at 37deg), 50mM KCl, and 1mM dithiothreitol (DTT) in 99.8% D2O | 99.8% D2O | 100mM | 6.5 | ambient | 310 | |
| 3 | 3D_15N-separated_NOESY | 1.5mM HPtArcB, 50mM KH2PO4-K2HPO4 (pH6.5 at 37deg), 50mM KCl, and 1mM dithiothreitol (DTT) in 90% H2O/10% D2O | 90% H2O/10% D2O | 100mM | 6.5 | ambient | 310 | |
| 4 | 4D_13C-separated_NOESY | 1.5mM HPtArcB, 50mM KH2PO4-K2HPO4 (pH6.5 at 37deg), 50mM KCl, and 1mM dithiothreitol (DTT) in 99.8% D2O | 99.8% D2O | 100mM | 6.5 | ambient | 310 | |
| 5 | HMQC-J | 1.5mM HPtArcB, 50mM KH2PO4-K2HPO4 (pH6.5 at 37deg), 50mM KCl, and 1mM dithiothreitol (DTT) in 90% H2O/10% D2O | 90% H2O/10% D2O | 100mM | 6.5 | ambient | 310 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | DRX | 500 |
| 2 | Bruker | DMX | 500 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| simulated annealing | The structures are based on a total of 1348 restraints, 1188 are NOE-derived distance constraints, 83 dihedral angle restraints,77 distance restraints from hydrogen bonds. | X-PLOR |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the lowest energy |
| Conformers Calculated Total Number | 100 |
| Conformers Submitted Total Number | 30 |
| Representative Model | 1 (lowest energy) |
| Additional NMR Experimental Information | |
|---|---|
| Details | The structure was determined using triple-resonance NMR spectroscopy. |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | refinement | X-PLOR | 3.851 | Bruenger |
| 2 | structure solution | DYANA | 1.5 | Guentert |
| 3 | collection | XwinNMR | 2.0 | Bruker |
| 4 | processing | NMRPipe | 1.7 | Delaglio |
| 5 | data analysis | nmrPipp | 4.2.4 | Garrett |
| 6 | data analysis | MOLMOL | 2.3 | Koradi |
