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Solution structure of dihydrofolate reductase complexed with trimethoprim, 33 structures
NMR Experiment Experiment Type Sample Contents Solvent Ionic Strength pH Pressure Temperature (K) Spectrometer 1 3D_15N-separated_NOESY 1mM DHFR-15N/TMP, 50mM phosphate buffer, 90% H2O, 10% D2O 90% H2O/10% D2O 100mM KCl 6.5 ambient 308 2 2D NOESY 1mM DHFR-15N/TMP, 50mM phosphate buffer, 90% H2O, 10% D2O 90% H2O/10% D2O 100mM KCl 6.5 ambient 308 3 2D NOESY 1mM DHFR-15N/TMP, 50mM phosphate buffer 100% D2O 100mM KCl 6.5 ambient 308 4 2D 15N rejected NOESY 1mM DHFR-15N/TMP, 50mM phosphate buffer, 90% H2O, 10% D2O 90% H2O/10% D2O 100mM KCl 6.5 ambient 308 5 J-modulated N15,1H-HSQC 0.5mM DHFR-15N/TMP, 50mM phosphate buffer, 5% DMPC/DHPC (3:1), 90% H2O, 10% D2O 90% H2O/10% D2O 100mM KCl 6.5 ambient 308
NMR Spectrometer Information Spectrometer Manufacturer Model Field Strength 1 Varian INOVA 600 2 Varian UNITY 600 3 Varian UNITYPLUS 600
NMR Refinement Method Details Software simulated annealing Annealing from 1000K down to 0K with 25K step, 10ps trajectory on each step VNMR
NMR Ensemble Information Conformer Selection Criteria all calculated structures submitted Conformers Calculated Total Number 33 Conformers Submitted Total Number 33 Representative Model 1 (closest to the average)
Computation: NMR Software # Classification Version Software Name Author 1 collection VNMR 6.1 Varian Inc 2 processing NMRPipe 1998-2001 Delaglio 3 data analysis Sparky 3.8 UCSF 4 refinement XPLOR-NIH 3.11 Clore 5 refinement CNS 1.0 Brunger