1KKA
Solution Structure of the Unmodified Anticodon Stem-loop from E. coli tRNA(Phe)
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | 3D_15N-separated_NOESY | 2mM ACSL-Phe, 15N, 13C | 10 mM Potassium Phosphate, 10mM NaCl, 0.02mM EDTA. 90% H2O-10% D2O or 100% D2O. | 10 mM KPi, 10mM NaCl | 6.8 | 1 atm | 298 | |
2 | 3D_13C-separated_NOESY | 2mM ACSL-Phe, 15N, 13C | 10 mM Potassium Phosphate, 10mM NaCl, 0.02mM EDTA. 90% H2O-10% D2O or 100% D2O. | 10 mM KPi, 10mM NaCl | 6.8 | 1 atm | 298 | |
3 | DQF-COSY | 2mM ACSL-Phe, 15N, 13C | 10 mM Potassium Phosphate, 10mM NaCl, 0.02mM EDTA. 90% H2O-10% D2O or 100% D2O. | 10 mM KPi, 10mM NaCl | 6.8 | 1 atm | 298 | |
4 | HNN-COSY | 2mM ACSL-Phe, 15N, 13C | 10 mM Potassium Phosphate, 10mM NaCl, 0.02mM EDTA. 90% H2O-10% D2O or 100% D2O. | 10 mM KPi, 10mM NaCl | 6.8 | 1 atm | 298 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Bruker | AMX | 500 |
NMR Refinement | ||
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Method | Details | Software |
simulated annealing | 294 NOE distance constraints, 36 base pair constraints, 70 torsion angle constraints. Global fold without torsion angle constraints. Refinement with torsion angle constraints. | X-PLOR |
NMR Ensemble Information | |
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Conformer Selection Criteria | structures with the least restraint violations,structures with the lowest energy |
Conformers Calculated Total Number | 60 |
Conformers Submitted Total Number | 8 |
Representative Model | 1 (n/a) |
Additional NMR Experimental Information | |
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Details | The structure was determined using 1H, 13C, 15N and 31P heteronuclear NMR spectroscopy. |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | refinement | X-PLOR | 3.861 | Brunger, A. |
2 | data analysis | Felix | 98 | MSI-Biosym |
3 | structure solution | X-PLOR | 3.1 | Brunger |