SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D-ROESY | 8 mM peptide | 90% H2O/10% D2O | 0 | 5.1 | ambient | 290 | |
| 2 | DQF-COSY | 8 mM peptide | 90% H2O/10% D2O | 0 | 5.1 | ambient | 290 | |
| 3 | 2D-ROESY | 8 mM peptide | 100% D2O | 0 | 5.1 | ambient | 290 | |
| 4 | COSY-35 | 8 mM peptide | 100% D2O | 0 | 5.1 | ambient | 290 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | AVANCE | 500 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| distance geometry and restrained molecular dynamics | The structures are based on 70 NOE distance restraints, 8 phi and 3 chi-1 dihedral angle restraints. No hydrogen bond restraints were employed. Note that the Ha-Hb coupling constants indicate rotational averaging about the Phe4 chi-1 angle. Several NOEs to the aromatic ring of Phe4 were not used to generate restraints as they could be satisfied by a -60 or 180 degree rotamer, but not by both. The mean backbone atom RMSD to the mean structure within the disulfide cycle is 0.31 +/- 0.06 Angstoms. | DGII |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the least restraint violations |
| Conformers Calculated Total Number | 80 |
| Conformers Submitted Total Number | 20 |
| Representative Model | 1 (closest to the average) |
| Additional NMR Experimental Information | |
|---|---|
| Details | This structure was determined using standard 2D homonuclear techniques. |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | structure solution | DGII | 98.0 | Timothy Havel |
| 2 | refinement | Discover | 3.1 | Accelrys |
