NMR solution structure of omega-conotoxin [K10]GVIA, a cyclic cysteine knot peptide
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D TOCSY | 2 mM [K10]GVIA, DSS | 95% H2O/5% D2O | 3.5 | ambient | 275 | ||
| 2 | 2D NOESY | 2 mM [K10]GVIA, DSS | 95% H2O/5% D2O | 3.5 | ambient | 275 | ||
| 3 | DQF-COSY | 2 mM [K10]GVIA, DSS | 95% H2O/5% D2O | 3.5 | ambient | 275 | ||
| 4 | 2D TOCSY | 2 mM [K10]GVIA, DSS | 100% D2O | 3.5 | ambient | 275 | ||
| 5 | 2D NOESY | 2 mM [K10]GVIA, DSS | 100% D2O | 3.5 | ambient | 275 | ||
| 6 | E-COSY | 2 mM [K10]GVIA, DSS | 100% D2O | 3.5 | ambient | 275 | ||
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | ARX | 500 |
| 2 | Bruker | DMX | 750 |
| 3 | Bruker | AVANCE | 600 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| The structures were calculated using torsion angle dynamics/simulated annealing protocol | A total of 467 NOE distance restraints (including H-bonds) and 22 dihedral angle restraints (16 phi and 6 chi) were used during structure calculations. | XwinNMR |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the lowest energy |
| Conformers Calculated Total Number | 50 |
| Conformers Submitted Total Number | 20 |
| Representative Model | 1 (lowest energy) |
| 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 | |
