SOLUTION STRUCTURE OF TOXIN CN12 FROM CENTRUROIDES NOXIUS ALFA SCORPION TOXIN ACTING ON SODIUM CHANNELS. NMR STRUCTURE
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | DQF COSY, 2D TOCSY, AND 2D NOSEY | 0.6 mM in H2O/D2O 90:10%; | 90% H2O and 10% D2O | none | 3.1 | ambient | 300 | |
| 2 | DQF-COSY, 2D TOCSY, AND 2D NOESY | 0.6 mM in 100% D2O | 100% D2O | none | 3.1 | ambient | 300 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Varian | UNITYPLUS | 500 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| simulated annealing | SEE JOURNAL REFERENCE | CNS |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | NO RESTRAINT VIOLATIONS LESS THAN 0.2 ANGSTROMS AND MIMINUM ENERGY LESS THAN 115.0 KCAL/MOL BEST REPRESENTATIVE CONFORMER IN THIS ENSEMBLE: 1 |
| Conformers Calculated Total Number | 250 |
| Conformers Submitted Total Number | 19 |
| Representative Model | 1 (minimized average structure) |
| Additional NMR Experimental Information | |
|---|---|
| Details | THE STRUCTURE WAS DETERMINED USING HOMONUCLEAR 1H-1H 2D NMR ON THE NATURAL TOXIN EXTRACTED FROM THE SCORPION VENOM |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | refinement | CNS | 1.1 | BRUNGER |
| 2 | processing | NMRPipe | 1 | DELAGLIO |
| 3 | collection | VNMR | 6.1c | VARIAN |
