1R57
NMR Solution Structure of a GCN5-like putative N-acetyltransferase from Staphylococcus aureus. Northeast Structural Genomics Consortium Target ZR31
SOLUTION NMR
NMR Experiment | ||||||||
---|---|---|---|---|---|---|---|---|
Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | 3D_13C-separated_NOESY | 1 mM protein U-15N,13C; 20 mM MES, 100 mM NaCl, 5 mM CaCl2, 0.02% NaN3; 95% H2O, 5% D2O | 95% H2O/5% D2O | .115 | 6.5 | ambient | 293 | |
2 | 3D_15N-separated_NOESY | 1 mM protein U-15N,13C; 20 mM MES, 100 mM NaCl, 5 mM CaCl2, 0.02% NaN3; 95% H2O, 5% D2O | 95% H2O/5% D2O | .115 | 6.5 | ambient | 293 | |
3 | HNHA | 1 mM protein U-15N,13C; 20 mM MES, 100 mM NaCl, 5 mM CaCl2, 0.02% NaN3; 95% H2O, 5% D2O | 95% H2O/5% D2O | .115 | 6.5 | ambient | 293 | |
4 | HNHB | 0.4 mM protein U-15N,5%-13C; 20 mM MES, 100 mM NaCl, 5 mM CaCl2, 0.02% NaN3; 95% H2O, 5% D2O | 95% H2O/5% D2O | .115 | 6.5 | ambient | 293 | |
5 | 4D_13C-separated_NOESY | 1 mM protein U-15N,13C, 20 mM MES, 100 mM NaCl, 5 mM CaCl2, 0.02% NaN3; 100% D2O | 100% D2O | .115 | 6.5 | ambient | 293 |
NMR Spectrometer Information | |||
---|---|---|---|
Spectrometer | Manufacturer | Model | Field Strength |
1 | Varian | INOVA | 600 |
2 | Varian | INOVA | 750 |
NMR Refinement | ||
---|---|---|
Method | Details | Software |
automated generation of initial distance restraint set distance geometry simulated annealing final refinement in explicit solvent | Backbone and sidechain assignments were determined manually from triple-resonance NMR data. NOE distance restraints were derived automatically from peak-picked data with AutoStructure, then error-checked and corrected manually. The structure is based on 848 restraints: 710 meaningful distance restraints, 58 hydrogen bond restraints, and 80 dihedral angle restraints. There are 9.5 restraints per restrained residue. 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 44-51 comprise a poorly-defined loop in this ensemble of structures. Residues 1-3 and 94-102 are unstructured termini. | AutoStructure |
NMR Ensemble Information | |
---|---|
Conformer Selection Criteria | structures with fewest restraint violations and lowest energy |
Conformers Calculated Total Number | 30 |
Conformers Submitted Total Number | 20 |
Representative Model | 1 (similarity to average, few violations, and low energy) |
Additional NMR Experimental Information | |
---|---|
Details | amide proton exchange was measured by dissolving a lyophilized protonated sample in D2O |
Computation: NMR Software | ||||
---|---|---|---|---|
# | Classification | Version | Software Name | Author |
1 | data analysis | AutoStructure | 1.1 | Huang, Tejero, Montelione |
2 | structure solution | CNS | 1.1 | Brunger, Schwieters, Kuszewski, Tjandra, Clore |
3 | refinement | CNS | 1.1 | Brunger |
4 | processing | Felix | 97 | MSI |
5 | data analysis | Sparky | 3 | Goddard, Kneller |
6 | data analysis | TALOS | Cornilescu, Delaglio, Bax |