NMR STRUCTURAL ANALYSIS OF THE COMPLEX FORMED BETWEEN ALPHA-BUNGAROTOXIN AND THE PRINCIPAL ALPHA-NEUROTOXIN BINDING SEQUENCE ON THE ALPHA7 SUBUNIT OF A NEURONAL NICOTINIC ACETYLCHOLINE RECEPTOR
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D NOESY | 1.6 MM ALPHA-BUNGAROTOXIN 15N]-ALPHA 7 19MER COMPLEX MM SODIUM PHOSPHATE, PH 5. MICROMOLAR SODIUM AZIDE 50 MICROMOLAR TMSP | 95% H2O/5% D2O | 5.50 | AMBIENT | 308.00 | ||
| 2 | 2D TOCSY | 1.6 MM ALPHA-BUNGAROTOXIN 15N]-ALPHA 7 19MER COMPLEX MM SODIUM PHOSPHATE, PH 5. MICROMOLAR SODIUM AZIDE 50 MICROMOLAR TMSP | 95% H2O/5% D2O | 5.50 | AMBIENT | 308.00 | ||
| 3 | 3D_15 SEPARATED_NOESY | 1.6 MM ALPHA-BUNGAROTOXIN 15N]-ALPHA 7 19MER COMPLEX MM SODIUM PHOSPHATE, PH 5. MICROMOLAR SODIUM AZIDE 50 MICROMOLAR TMSP | 95% H2O/5% D2O | 5.50 | AMBIENT | 308.00 | ||
| 4 | 3D_15N- SEPARATED_TOCSY | 1.6 MM ALPHA-BUNGAROTOXIN 15N]-ALPHA 7 19MER COMPLEX MM SODIUM PHOSPHATE, PH 5. MICROMOLAR SODIUM AZIDE 50 MICROMOLAR TMSP | 95% H2O/5% D2O | 5.50 | AMBIENT | 308.00 | ||
| 5 | 2D 1H-15N HSQC | 1.6 MM ALPHA-BUNGAROTOXIN 15N]-ALPHA 7 19MER COMPLEX MM SODIUM PHOSPHATE, PH 5. MICROMOLAR SODIUM AZIDE 50 MICROMOLAR TMSP | 95% H2O/5% D2O | 5.50 | AMBIENT | 308.00 | ||
| 6 | HNHA | 1.6 MM ALPHA-BUNGAROTOXIN 15N]-ALPHA 7 19MER COMPLEX MM SODIUM PHOSPHATE, PH 5. MICROMOLAR SODIUM AZIDE 50 MICROMOLAR TMSP | 95% H2O/5% D2O | 5.50 | AMBIENT | 308.00 | ||
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | AVANCE | 600 |
| 2 | Bruker | AVANCE | 400 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| DISTANCE GEOMETRY DYNAMIC SIMULATED ANNEALING | RMS DEVIATIONS FROM IDEAL VALUES BOND LENGTH(A) 0.0039, ANGLES(DEG) 0.61, IMPROPERS(DEG) 0.5 | CNS |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | |
| Conformers Calculated Total Number | |
| Conformers Submitted Total Number | 1 |
| Representative Model | 1 (minimized average structure) |
| Additional NMR Experimental Information | |
|---|---|
| Details | THE WELL-DEFINED REGIONS IN THE COMPLEX, EXHIBITING EXTENSIVE LONG RANGE NOES, ARE: BGTX: 1-16, 22-28, 39-48, AND 54-68 ALPHA 7 19MER: 185-194. |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | refinement | CNS | 1.0 | BRUNGER, A.T., ET AL. |
| 2 | structure solution | XwinNMR | 2.1 | |
| 3 | structure solution | NMRPipe | 1.8 | |
| 4 | structure solution | Sparky | 3.87 | |
