B4DIMERA: A DE NOVO DESIGNED FOUR-STRANDED BETA-SHEET ASSEMBLED USING A DISULFIDE BOND
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D NOESY | 1mM B4dimer, trimethylsilylpropionate, 90% H2O, 10% D2O | 90% H2O/10% D2O | unbuffered | 3.5 | ambient | 323 | |
| 2 | DQF-COSY | 1mM B4dimer, trimethylsilylpropionate, 90% H2O, 10% D2O | 90% H2O/10% D2O | unbuffered | 3.5 | ambient | 323 | |
| 3 | TOCSY | 1mM B4dimer, trimethylsilylpropionate, 90% H2O, 10% D2O | 90% H2O/10% D2O | unbuffered | 3.5 | ambient | 323 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | DRX | 500 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| torsion angle dynamics/ simulated annealing | The nineteen structures were determined by NMR and torsion angle dynamics/simulated annealing methods. The peptide dimer was treated as a single entity and symmetry elements were not utilized during structure calculations. The structures are based on a total of 276 NOE-derived restraints. The list of constraints is available in the file water_uppercons.txt. Structure calculations were performed with the program DYANA-1.5 (P. Guentert, C. Mumenthaler, K. Wuthrich, J. Mol. Biol.(1997)Vol.273, 283-298). No violation of distance constraints from NOEs exceeded 0.3Angstroms. The ensemble of structures is superimposed over the best-structured region encompasing residues V19-L34. Residues 1-11 were unstructured and their co-ordinates are not given. The average RMSDs between the superposed structures and the average structure are as follows: 1.04(chain A, residues 20-34, backbone atoms) 0.91(chain B, residues 20-34, backbone atoms). | DYANA |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the least restraint violations,structures with the lowest energy |
| Conformers Calculated Total Number | 400 |
| Conformers Submitted Total Number | 19 |
| Representative Model | 2 (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 | DYANA | 1.5 | Guentert |
| 2 | refinement | DYANA | 1.5 | Guentert |
