1MWB

Solution structure of the recombinant hemoglobin from the cyanobacterium Synechocystis sp. PCC 6803 in its hemichrome state

SOLUTION NMR

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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