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Solution structure of the recombinant hemoglobin from the cyanobacterium Synechocystis sp. PCC 6803 in its hemichrome state
NMR Experiment Experiment Type Sample Contents Solvent Ionic Strength pH Pressure Temperature (K) Spectrometer 1 2D NOESY 0.6 - 2 mM protein, 20 mM K or Na phosphate 90% H2O/10% D2O 50 mM 7.5 ambient 298 2 3D_13C-separated_NOESY 1 mM U-15N, 13C protein, 20 mM K or Na phosphate 90% H2O/10% D2O 50 mM 7.5 ambient 298 3 3D_15N-separated_NOESY 1 mM U-15N protein, 20 mM K or Na phosphate 90% H2O/10% D2O 50 mM 7.5 ambient 298 4 J-modulated 1H-15N HSQC 1 mM U-15N protein, 20 mM K or Na phosphate 90% H2O/10% D2O 50 mM 7.5 ambient 298 5 2D TOCSY 0.6 - 2 mM protein, 20 mM K or Na phosphate 100% D2O 50 mM 7.5 ambient 298
NMR Spectrometer Information Spectrometer Manufacturer Model Field Strength 1 Bruker DRX 600 2 Varian INOVA 800
NMR Refinement Method Details Software distance geometry, simulated annealing, molecular dynamics, torsional angle database X-PLOR
NMR Ensemble Information Conformer Selection Criteria structures with lowest energy and least restraint violations Conformers Calculated Total Number 100 Conformers Submitted Total Number 20 Representative Model 1 (lowest energy and fewest violations)
Additional NMR Experimental Information Details This is a low-spin Fe(+3) complex. Standard methods as applied to dimagnetic proteins were used to determine the structure.
Computation: NMR Software # Classification Version Software Name Author 1 structure solution X-PLOR 3.851 Brunger 2 data analysis Felix 2000 Accelrys 3 collection XwinNMR 2.5 Bruker 4 processing NMRPipe 2.1 Delaglio 5 refinement X-PLOR-NIH 1.2.1 Brunger