NMR solution structure of omega-conotoxin MVIIA, a N-type calcium channel blocker
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D NOESY | 2mM MVIIA, 95% H2O, D2O, DSS | 95% H2O/5% D2O | 3.5 | ambient | 293 | ||
| 2 | 2D TOCSY | 2mM MVIIA, 95% H2O, D2O, DSS | 95% H2O/5% D2O | 3.5 | ambient | 293 | ||
| 3 | DQF-COSY | 2mM MVIIA, 95% H2O, D2O, DSS | 95% H2O/5% D2O | 3.5 | ambient | 293 | ||
| 4 | 2D NOESY | 2mM MVIIA | 100% D2O | 3.5 | ambient | 293 | ||
| 5 | 2D TOCSY | 2mM MVIIA | 100% D2O | 3.5 | ambient | 293 | ||
| 6 | E-COSY | 2mM MVIIA | 100% D2O | 3.5 | ambient | 293 | ||
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | DRX | 500 |
| 2 | Bruker | AMX | 750 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| Solution structures were calculated using torsion angle dynamics/simulated annealing techniques. | A total of 456 distance restraints (including H-bonds) and 31 dihedral distance restraints (including 22 phis and 9 chi angles) were used to calculate the structure. | XwinNMR |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the lowest energy |
| Conformers Calculated Total Number | 50 |
| Conformers Submitted Total Number | 17 |
| Representative Model | 11 (lowest energy) |
| Additional NMR Experimental Information | |
|---|---|
| Details | This structure was detrmined using standard 2D homonucelar NMR techniques. |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | collection | XwinNMR | 3.5 | |
| 2 | structure solution | X-PLOR | 3.851 | |
| 3 | refinement | X-PLOR | 3.851 | |
