Solution structure of the monomeric [Thr(B27)->Pro,Pro(B28)->Thr] insulin mutant (PT insulin)
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D NOESY | 2.8 mM PT-insulin; 35% Trifluoroethanol; 5% D2O; 60% H2O | 35% Trifluoroethanol; 5% D2O; 60% H2O | 3.13 | 1 atm | 298 | ||
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Varian | UNITY INOVA | 500 |
| 2 | Varian | UNITY INOVA | 750 |
| 3 | Varian | UNITY INOVA | 800 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| simulated annealing, molecular dynamics | 197 NOEs, 52 dihedral angles, 11 hydrogen bonds. Force constants: k(NOE)= 50 kcal mol-1 AA-1, k(DIHE)= 200 kcal mol-1 AA-1 | NMRPipe |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the lowest energy |
| Conformers Calculated Total Number | 100 |
| Conformers Submitted Total Number | 25 |
| Representative Model | 12 (lowest energy) |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | processing | NMRPipe | Delaglio, Grzesiek, Vuister, Zhu, Pfeifer, Bax | |
| 2 | data analysis | XEASY | Digital UNIX V4.0 version 1 | Bartels, Xia, Billeter, Guntert, Wuthrich |
| 3 | structure solution | X-PLOR | 3.851 | Brunger |
| 4 | refinement | X-PLOR | 3.851 | Brunger |
