NMR structure of Aquifex aeolicus 5,10-methenyltetrahydrofolate synthetase: Northeast Structural Genomics Consortium Target QR46
SOLUTION NMR
| NMR Experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
| 1 | 3D_15N-separated_NOESY | 1 mM 5,10-methenyltetrahydrofolate synthetase U-15N,13C; 20 mM MES, 100 mM NaCl, 5 mM CaCl2, 10 mM DTT, 0.02% NaN3 pH 6.5 95% H2O, 5% D2O | 95% H2O/5% D2O | 0.115 | 6.5 | ambient | 298 | |
| 2 | 3D_13C-separated_NOESY | 1 mM 5,10-methenyltetrahydrofolate synthetase U-15N,13C; 20 mM MES, 100 mM NaCl, 5 mM CaCl2, 10 mM DTT, 0.02% NaN3 pH 6.5 95% H2O, 5% D2O | 95% H2O/5% D2O | 0.115 | 6.5 | ambient | 298 | |
| 3 | 4D_13C-separated_NOESY | 1 mM 5,10-methenyltetrahydrofolate synthetase U-15N,13C; 20 mM MES, 100 mM NaCl, 5 mM CaCl2, 10 mM DTT, 0.02% NaN3 pH 6.5 100% D2O | 100% D2O | 0.115 | 6.5 | ambient | 298 | |
| 4 | HNHA | 1 mM 5,10-methenyltetrahydrofolate synthetase U-15N,13C; 20 mM MES, 100 mM NaCl, 5 mM CaCl2, 10 mM DTT, 0.02% NaN3 pH 6.5 95% H2O, 5% D2O | 95% H2O/5% D2O | 0.115 | 6.5 | ambient | 298 | |
| NMR Spectrometer Information | |||
|---|---|---|---|
| Spectrometer | Manufacturer | Model | Field Strength |
| 1 | Varian | UNITY | 600 |
| 2 | Varian | INOVA | 600 |
| 3 | Varian | INOVA | 750 |
| 4 | Varian | INOVA | 800 |
| NMR Refinement | ||
|---|---|---|
| Method | Details | Software |
| MOLECULAR DYNAMICS, SIMULATED ANNEALING | FINAL REFINEMENT IN EXPLICIT SOLVENT WITH LEONARD-JONES AND ELECTROSTATIC POTENTIALS. BACKBONE AND SIDECHAIN ASSIGNMENTS WERE DETERMINED MANUALLY FROM TRIPLE-RESONANCE NMR DATA. NOE DISTANCE RESTRAINTS WERE DERIVED MANUALLY FROM NOESY DATA. THE STRUCTURE IS BASED ON 1235 RESTRAINTS: 938 NOE DISTANCE RESTRAINTS, 112 H-BOND RESTRAINTS (56 H-BONDS), AND 185 DIHEDRAL RESTRAINTS. PHI DIHEDRAL RESTRAINTS WERE DERIVED FROM THE HNHA EXPERIMENT AND TALOS. PSI DIHEDRAL RESTRAINTS WERE DERIVED FROM NOE RATIOS, SECONDARY STRUCTURE PROPENSITIES EVIDENT IN PRELIMINARY STRUCTURES, ALPHA CARBON CHEMICAL SHIFTS, AND TALOS. RESIDUES 1-2 AND 182-194 ARE UNSTRUCTURED TERMINI IN THIS ENSEMBLE. | NIH-XPLOR |
| 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 | 29 |
| Conformers Submitted Total Number | 20 |
| Representative Model | 1 (combination of factors) |
| Computation: NMR Software | ||||
|---|---|---|---|---|
| # | Classification | Version | Software Name | Author |
| 1 | refinement | NIH-XPLOR | 2.0.4 | AT Brunger, GM Clore, J Kuszewski, CD Schwieters, N Tjandra |
| 2 | refinement | CNS | 1.1 | AT Brunger |
| 3 | collection | VNMR | 6.1C | Varian Inc. |
| 4 | data analysis | Felix | 97 | MSI/Biosym |
| 5 | data analysis | TALOS | G Cornilescu, F Delaglio, A Bax | |
