The transient complex of poplar plastocyanin with turnip cytochrome f determined with paramagnetic NMR
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D 15N HSQC | 0.5 mM Cd-substituted poplar plastocyanin + 0.35 mM soluble fragment of turnip cytochrome f in oxidized state in 10 mM sodium phosphate pH 6.0 | 94% H2O, 6% D2O | 10 mM | 6.0 | 1 atm | 303 | |
| 2 | 2D 15N HSQC | 0.5 mM Cd-substituted poplar plastocyanin + 0.35 mM soluble fragment of turnip cytochrome f in reduced state in 10 mM sodium phosphate pH 6.0 + 1 mM sodium ascorbate | 94% H2O, 6% D2O | 11 mM | 6.0 | 1 atm | 303 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | DMX | 600 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| Rigid body docking using intermolecular pseudocontact shifts restraints, chemical shift perturbation restraints and electrostatic restraints. | The structures are based on 38 chemical shift perturbation restraints, 42 pseudocontact shifts restraints, 42 pseudocontact angle restraints, 120 minimal distance restraints and 4 electrostatic restraints. Backbone RMSD (in Angstrom) with the mean for each model: 1: 1.28, 2: 2.26, 3: 1.29, 4: 3.12, 5: 1.52, 6: 1.49, 7: 3.68, 8: 2.68, 9: 1.58, 10: 3.43, average=2.23+/-0.88 | Azara |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with the least restraint violations |
| Conformers Calculated Total Number | 104 |
| Conformers Submitted Total Number | 10 |
| Representative Model | 1 (closest to the average) |
| Additional NMR Experimental Information | |
|---|---|
| Details | This structure was determined using the XRD structures of plastocyanin and cytochrome f, docked on the basis of intermolecular pseudocontact shifts and chemical shift perturbations due to binding. |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | processing | Azara | 2.7 | W. Boucher |
| 2 | data analysis | ANSIG | Ansig-for-Windows 1.02 | P. Kraulis, M. Helgstrand |
| 3 | structure solution | X-PLOR | XPLOR-NIH 2.9.1 | |
| 4 | refinement | X-PLOR | XPLOR-NIH 2.9.1 | |
