1PLW
NMR structure of Methionine-Enkephalin in fast tumbling DMPC/DHPC bicelles
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D NOESY | 5.4uM Menk; DMPC/DHPC: 0.5:1 (molar ratio); Lipid/peptide: 25:1 (molar ratio); 10% w/v of lipids in water; 90%H2O, 10%D2O | 90% H2O/10% D2O | 9mM | 4.5 | ambient | 295 | |
| 2 | g-COSY | 5.4uM Menk; DMPC/DHPC: 0.5:1 (molar ratio); Lipid/peptide: 25:1 (molar ratio); 10% w/v of lipids in water; 90%H2O, 10%D2O | 90% H2O/10% D2O | 9mM | 4.5 | ambient | 295 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Varian | INOVA | 600 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| simulated annealing | The structures are based on a total of 2 phi angle and 57 NOE-derived distance constraints. 1000 high-temperature steps were used (15 ps) up to a final temperature of 50000 K then 1000 cooling steps (250 K, 15 ps) were applied. Finally, 10 cycles of 200 minimization steps were performed. A repel constant value of 0.8 was used | VNMR |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the lowest energy |
| Conformers Calculated Total Number | 200 |
| Conformers Submitted Total Number | 80 |
| Representative Model | 1 (1 to 4, closest to the average of each of the four conformers) |
| Additional NMR Experimental Information | |
|---|---|
| Details | PFG experiments were also performed on the sample |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | collection | VNMR | 6.1C | Varian Inc. |
| 2 | processing | NMRPipe | 2.0 Rev 2001.117.12.48 | Frank Delaglio |
| 3 | data analysis | NMRView | 5.0.4 | Bruce A. Johnson |
| 4 | structure solution | CNS | 1.1 | Axel T. Brunger |
| 5 | refinement | CNS | 1.1 | Axel T. Brunger |
