Solution structure of the native CnErg1 Ergtoxin, a highly specific inhibitor of HERG channel
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D NOESY | 0.55 mg of lyophilized natural ErgTx | 0.160 mL, H2O/D2O 9:1, pH 3 | 3 | ambient | 303 | ||
| 2 | 2D TOCSY | 0.55 mg of lyophilized natural ErgTx | 0.160 mL, H2O/D2O 9:1, pH 3 | 3 | ambient | 303 | ||
| 3 | DQF-COSY | 0.55 mg of lyophilized natural ErgTx | 0.160 mL, H2O/D2O 9:1, pH 3 | 3 | ambient | 303 | ||
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Varian | INOVA | 500 |
| 2 | Varian | INOVA | 600 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| simulated annealing | The structures are based on a total of 452 distance constraints (252 are intraresidual NOE-derivated distance constraints, 200 are interresidual NOE-derivated distance constraints including 49 long range), 13 3J and 10 hbonds | Discover |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with acceptable covalent geometry, structures with favorable non-bond energy, structures with the least restraint violations, structures with the lowest energy |
| Conformers Calculated Total Number | 10 |
| Conformers Submitted Total Number | 1 |
| Representative Model | 1 (fewest violations, lowest energy) |
| Additional NMR Experimental Information | |
|---|---|
| Details | shigemi tube and nano-probe |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | processing | Discover | insightII 2000 | Accelrys technologies |
| 2 | data analysis | Discover | insightII 2000 | Accelrys technologies |
| 3 | refinement | Discover | insightII 2000 | Accelrys technologies |
