SOLUTION STRUCTURE OF C1-T1, A TWO-DOMAIN PROTEINASE INHIBITOR DERIVED FROM THE CIRCULAR PRECURSOR PROTEIN NA-PROPI FROM NICOTIANA ALATA
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D NOESY | 1mM C1-T1, unlabeled | 90% H2O/10% D2O | 0 | 5.8 | 1 atm | 313 | |
| 2 | 2D NOESY | 1mM C1-T1, unlabeled | 99% D2O | 0 | 5.8 | 1 atm | 313 | |
| 3 | 3D_15N-separated_NOESY | 1mM C1-T1, U-15N,13C | 90% H2O/10% D2O | 0 | 5.8 | 1 atm | 313 | |
| 4 | DQF-COSY | 1mM C1-T1, unlabeled | 90% H2O/10% D2O | 0 | 5.8 | 1 atm | 313 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | DMX | 750 |
| 2 | Bruker | ARX | 500 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| simulated annealing with torsion angle dynamics | the structures are based on a total of 1193 constraints, 1039 are NOE-derived distance constraints, 82 dihedral angle restraints, and 72 hydrogen bond distance constraints | XwinNMR |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the lowest energy |
| Conformers Calculated Total Number | 100 |
| Conformers Submitted Total Number | 20 |
| Representative Model | 4 (best secondary structure) |
| Additional NMR Experimental Information | |
|---|---|
| Details | This structure was determined using standard 2D homonuclear techniques and 3D heteronuclear techniques. |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | collection | XwinNMR | 2.6 | Bruker |
| 2 | processing | XwinNMR | 2.6 | Bruker |
| 3 | data analysis | XEASY | 1.3.7 | Bartels, Xia, Billeter, Guentert, Wuethrich |
| 4 | structure solution | DYANA | 1.5 | Guentert |
| 5 | structure solution | X-PLOR | 3.851 | Brunger |
| 6 | refinement | X-PLOR | 3.851 | Brunger |
