SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 3D_15N-separated_NOESY | 2.2 mM replicase operator RNA U-15N,13C; 10 mM KPi buffer; 10 mM NaCl; 0.2 mM EDTA | 90% H2O/10% D2O | ~50 mM | 6.8 | ambient | 298 | |
| 2 | 2D NOESY | 2.2 mM replicase operator RNA U-15N,13C; 10 mM KPi buffer; 10 mM NaCl; 0.2 mM EDTA | 90% H2O/10% D2O | ~50 mM | 6.8 | ambient | 298 | |
| 3 | 3D_13C-separated_NOESY | 2.2 mM replicase operator RNA U-15N,13C; 10 mM KPi buffer; 10 mM NaCl; 0.2 mM EDTA | 100% D2O | |||||
| 4 | 2D NOESY | 2.2 mM replicase operator RNA U-15N,13C; 10 mM KPi buffer; 10 mM NaCl; 0.2 mM EDTA | 100% D2O | |||||
| 5 | DQF-COSY | 2.2 mM replicase operator RNA U-15N,13C; 10 mM KPi buffer; 10 mM NaCl; 0.2 mM EDTA | 100% D2O | |||||
| 6 | 31P-1H HetCor | 2.2 mM replicase operator RNA U-15N,13C; 10 mM KPi buffer; 10 mM NaCl; 0.2 mM EDTA | 100% D2O | |||||
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Bruker | AMX | 500 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| simulated annealing and molecular dynamics refinement | structures were calculated using 469 conformationally restrictive NOE distance constraints (i.e., intra-residue sugar-sugar NOEs are not included), 20 H-bond base pair constraints, 30 backbone dihedral restraints, and dihedral restraints to restrict sugar pucker conformation. | UXNMR |
| NMR Ensemble Information | |
|---|---|
| Conformer Selection Criteria | back calculated data agree with experimental NOESY spectrum,structures with acceptable covalent geometry,structures with the least restraint violations, structures with the lowest energy |
| Conformers Calculated Total Number | 111 |
| Conformers Submitted Total Number | 23 |
| Representative Model | 1/2 (minimized average structure) |
| Additional NMR Experimental Information | |
|---|---|
| Details | The structure was determined using standard 2D homonuclear and 2D/3D heteronuclear techniques |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | collection | UXNMR | 1994 | Spectraspin |
| 2 | processing | Felix | 1997 | Biosym-MSI |
| 3 | structure solution | X-PLOR | 3.851 | Brunger |
| 4 | refinement | X-PLOR | 3.851 | Brunger |
