REFINED SOLUTION STRUCTURE OF THE (13C,15N-LABELED) B12-BINDING SUBUNIT OF GLUTAMATE MUTASE FROM CLOSTRIDIUM TETANOMORPHUM
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 2D NOESY | 1.5mM MutS U-98% 15N,13C; 11mM phosphate buffer; | 90% H2O/10% D2O | 11mM KXH3-XPO4 | 6.0 | 1 atm | 299 | |
| 2 | 3D_13C-separated_NOESY | 1.5mM MutS U-98% 15N,13C; 11mM phosphate buffer; | 90% H2O/10% D2O | 11mM KXH3-XPO4 | 6.0 | 1 atm | 299 | |
| 3 | 3D_15N-separated_NOESY | 1.5mM MutS U-98% 15N,13C; 11mM phosphate buffer; | 90% H2O/10% D2O | 11mM KXH3-XPO4 | 6.0 | 1 atm | 299 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Varian | UNITYPLUS | 500 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| distance geometry, simulated annealing, simulated annealing refinement, energy minimization | The MutS structure models 1-15 are based on a total of 1792 restraints, 1553 are NOE-derived distance constraints, 184 dihedral angle restraints, 55 distance restraints from hydrogen bonds. Backbone dihedral angles Phi and Psi were obtained by employing TALOS software [G. Cornilescu et al., J. Biomol. NMR 1999, 13, 289-302]. Phi and Psi torsion angle restraints for the MutS residues 23-30, which form a "nascent" helix [M. Tollinger et al., Structure 1998, 6, 1021-1033], were not used in structure calculations for MutS models 16-30. | NMRPipe |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | structures with acceptable covalent geometry,structures with favorable non-bond energy,structures with the least restraint violations,structures with the lowest energy |
| Conformers Calculated Total Number | 200 |
| Conformers Submitted Total Number | 30 |
| Representative Model | 16 (fewest violations) |
| Additional NMR Experimental Information | |
|---|---|
| Details | The structure was determined using triple-resonance NMR spectroscopy. |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | processing | NMRPipe | Delaglio | |
| 2 | data analysis | ANSIG | 3.3 | Kraulis |
| 3 | structure solution | X-PLOR | 3.8.5.1 | Bruenger |
| 4 | data analysis | TALOS | 98.040.21.02 | Cornilescu |
| 5 | refinement | X-PLOR | 3.8.5.1 | Bruenger |
