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SOLUTION STRUCTURE OF DIHYDROFOLATE REDUCTASE COMPLEXED WITH TRIMETHOPRIM AND NADPH, 24 STRUCTURES
NMR Experiment Experiment Type Sample Contents Solvent Ionic Strength pH Pressure Temperature (K) Spectrometer 1 3D_15N-separated_NOESY 3mM DHFR-15N/TMP/NADPH, 50 mM phosphate buffer 90% H2O/10% D2O 100 mM KCl 6.5 ambient 308 2 HNHA 3mM DHFR-15N/TMP/NADPH, 50 mM phosphate buffer 90% H2O/10% D2O 100 mM KCl 6.5 ambient 308 3 3D_15N-separated_ROESY 3mM DHFR-15N/TMP/NADPH, 50 mM phosphate buffer 90% H2O/10% D2O 100 mM KCl 6.5 ambient 308 4 2D_N15-rejected_NOESY 3mM DHFR-15N/TMP/NADPH, 50 mM phosphate buffer 90% H2O/10% D2O 100 mM KCl 6.5 ambient 308 5 2D NOESY 3 mM DHFR/TMP/NADPH, 50 mM phosphate buffer 100% D2O 100 mM KCl 6.5 ambient 308 6 DQF-COSY 3 mM DHFR/TMP/NADPH, 50 mM phosphate buffer 100% D2O 100 mM KCl 6.5 ambient 308 7 J-modulated N15, H1-HSQC 0.5mM DHFR-15N/TMP/NADPH, 50 mM phosphate buffer, 5% DMPC/DHPC (3:1) 90% H2O/10% D2O 100 mM KCl 6.5 ambient 308 8 J-modulated N15, H1-HSQC 0.25mM DHFR-15N/TMP/NADPH, 50 mM phosphate buffer, 5% C12E5/hexanol 90% H2O/10% D2O 100 mM KCl 6.5 ambient 308
NMR Spectrometer Information Spectrometer Manufacturer Model Field Strength 1 Varian UNITYPLUS 500 2 Varian UNITY 600 3 Varian INOVA 600
NMR Refinement Method Details Software simulated annealing 10 ps at 1000K, 40 ps cooling from 1000 to 0K, 1000 steps of EM VNMR
NMR Ensemble Information Conformer Selection Criteria structures with the least restraint violations Conformers Calculated Total Number 32 Conformers Submitted Total Number 24 Representative Model 1 (closest to the average)
Computation: NMR Software # Classification Version Software Name Author 1 collection VNMR 6.1 Varian 2 processing NMRPipe 1998-2001 Delaglio 3 structure solution CNS 0.9 Brunger 4 refinement CNS 1.0 Brunger