SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D TOCSY | 0.7 mM viscotoxin B; phosphate buffer pH 3.6 50mM; 90%H20, 10% D2O | 90%H20, 10% D2O | 50mM phosphate buffer | 3.6 | ambient | 285 | |
| 2 | 2D NOESY | 0.7 mM viscotoxin B; phosphate buffer pH 3.6 50mM; 90%H20, 10% D2O | 90%H20, 10% D2O | 50mM phosphate buffer | 3.6 | ambient | 285 | |
| 3 | DQF-COSY | 0.7 mM viscotoxin B; phosphate buffer pH 3.6 50mM; 90%H20, 10% D2O | 90%H20, 10% D2O | 50mM phosphate buffer | 3.6 | ambient | 285 | |
| 4 | 2D TOCSY | 0.7 mM viscotoxin B; phosphate buffer pH 3.6 50mM; 90%H20, 10% D2O | 90%H20, 10% D2O | 50mM phosphate buffer | 3.6 | ambient | 295 | |
| 5 | 2D NOESY | 0.7 mM viscotoxin B; phosphate buffer pH 3.6 50mM; 90%H20, 10% D2O | 90%H20, 10% D2O | 50mM phosphate buffer | 3.6 | ambient | 295 | |
| 6 | DQF-COSY | 0.7 mM viscotoxin B; phosphate buffer pH 3.6 50mM; 90%H20, 10% D2O | 90%H20, 10% D2O | 50mM phosphate buffer | 3.6 | ambient | 295 | |
| 7 | 2D TOCSY | 0.7 mM viscotoxin B; phosphate buffer pH 3.6 50mM; D2O | D2O | 50mM phosphate buffer | 3.6 | ambient | 285 | |
| 8 | 2D NOESY | 0.7 mM viscotoxin B; phosphate buffer pH 3.6 50mM; D2O | D2O | 50mM phosphate buffer | 3.6 | ambient | 285 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | DRX | 500 |
| 2 | Bruker | DMX | 500 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| DYANA was employed for structure determination Discover was employed for energy minimisation of DYANA structures | the structures are based on a total of 691 restraints. 631 are NOE-derived distance restraints,(224intraresidues,159 short range, 125 medium range and 123 long range), 18 dihedral angle restraints, 24 for backbone H-bonds and 18 for disulphide bridges. Bond lengths CD-OE2 in glutamic acid residues and CG-OD2 in aspartic acid residues are larger than typical values (as seen in remark 500) because protonated forms were considered due to the low experimental pH. | DYANA |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the lowest energy |
| Conformers Calculated Total Number | 600 |
| Conformers Submitted Total Number | 10 |
| Representative Model | 1 (lowest energy) |
| Additional NMR Experimental Information | |
|---|---|
| Details | This structure was determined using standard 1H 2D NMR techniques |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | structure solution | DYANA | 1.4 | Guentert |
| 2 | structure solution | Discover | 1997 version | Molecular Simulations, san Diego, CA, USA |
| 3 | processing | XwinNMR | 2.6 | Bruker |
| 4 | data analysis | XEASY | 1.3 | Xia and Bartels |
| 5 | refinement | Discover | 1997 version | Molecular Simulations, san Diego, CA, USA |
