1PLX
NMR structure of Methionine-Enkephalin in fast tumbling Bicelles/DMPG
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | 2D NOESY | 5.1uM Menk; (DMPC+DMPG)/DHPC: 0.5:1 (molar ratio); DMPC/DMPG: 9:1 (molar ratio); Lipid/peptide: 25:1 (molar ratio); 10% w/v of lipids in water; 90%H2O, 10%D2O | 90% H2O/10% D2O | 9mM | 4.8 | ambient | 295 | |
2 | g-COSY | 5.1uM Menk; (DMPC+DMPG)/DHPC: 0.5:1 (molar ratio); DMPC/DMPG: 9:1 (molar ratio); Lipid/peptide: 25:1 (molar ratio); 10% w/v of lipids in water; 90%H2O, 10%D2O | 90% H2O/10% D2O | 9mM | 4.8 | ambient | 295 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Varian | INOVA | 600 |
NMR Refinement | ||
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Method | Details | Software |
simulated annealing | The structures are based on a total of 2 phi angle and 58 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 | |
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Conformer Selection Criteria | structures with the lowest energy |
Conformers Calculated Total Number | 200 |
Conformers Submitted Total Number | 80 |
Representative Model | 1 (1 and 2, closest to the average of each of the two conformers) |
Additional NMR Experimental Information | |
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Details | PFG diffusion experiments were also performed on the sample |
Computation: NMR Software | ||||
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# | 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 |