1N09
A minimal beta-hairpin peptide scaffold for beta-turn display
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | DQF-COSY | 5 mM peptide, unbuffered at pH 5.0 | 90% H2O/10% D2O | 0 | 5.0 | 1 atm | 288 | |
| 2 | 2D TOCSY | 5 mM peptide, unbuffered at pH 5.0 | 90% H2O/10% D2O | 0 | 5.0 | 1 atm | 288 | |
| 3 | 2D ROESY | 5 mM peptide, unbuffered at pH 5.0 | 90% H2O/10% D2O | 0 | 5.0 | 1 atm | 288 | |
| 4 | 2D ROESY | 5 mM peptide, unbuffered at pH 5.0 | 100% D2O | 0 | 5.0 | 1 atm | 288 | |
| 5 | 2D COSY-35 | 5 mM peptide, unbuffered at pH 5.0 | 100% D2O | 0 | 5.0 | 1 atm | 288 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | DRX | 500 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| Distance geometry and restrained molecular dynamics with chemical shift restraints. | 100 structures were calculated using distance geometry. The 80 structures of lowest penalty function were refined using the Sander module of AMBER (v6.0). The calculation employed 79 distance restraints, 12 dihedral angle restraints and 13 chemical shift restraints. The 20 structures of lowest violation energy were chosen to represent the structure. There are no violations of the input restraints > 0.1 A or 2 degrees. The rms. difference between calculation and observed chemical shifts is 0.09 ppm. 79% of the backbone geometries are in the most favourable region of the Ramachandran plot. The backbone heavy atom rmsd from the mean structure is 0.39+/-0.08 A. | XwinNMR |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the least restraint violations |
| Conformers Calculated Total Number | 80 |
| Conformers Submitted Total Number | 20 |
| Representative Model | 4 (closest to the average) |
| Additional NMR Experimental Information | |
|---|---|
| Details | Chemical shift assignments were determined using standard 2D homonuclear techniques. |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | collection | XwinNMR | 3.1 | bruker |
| 2 | data analysis | Felix | 980 | bruker |
| 3 | structure solution | DGII | 980 | Tim Havel |
| 4 | refinement | Amber | 6.0 | Case, Kollman, ET. AL. |
| 5 | structure solution | Amber | 6.O | |
