1JI8

Solution Structure of Pyrobaculum Aerophilum DsrC/gamma subunit of dissimilatory sulfite reductase

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	4D_13C-separated_NOESY	2 mM DsrC U-15N, 25 mM phosphate buffer, pH* 7.0 100 mM NaCl	99% D2O	100 mM salt, 25 mM phosphate buffer	7.4	ambient	298
2	3D_13C,15N-simultaneous NOESY	2 mM DsrC U-13C,15N, 25 mM phosphate buffer, pH 7.4, 100 mM NaCl, 90% H2O, 10% D2O	90% H2O, 10% H2O	100 mM salt, 25 mM phosphate buffer	7.4	ambient	298
3	3D_15N-separated_NOESY	2 mM DsrC U-15N, 25 mM phosphate buffer, pH 7.4, 100 mM NaCl, 90% H2O, 10% D2O	90% H2O/10% D2O	100 mM salt, 25 mM phosphate buffer	7.4	ambient	298
4	HNHA	2 mM DsrC U-15N, 25 mM phosphate buffer, pH 7.4, 100 mM NaCl, 90% H2O, 10% D2O	90% H2O/10% D2O	100 mM salt, 25 mM phosphate buffer	7.4	ambient	298
5	1H-15N, HSQC D2O exchange	2 mM DsrC U-13C,15N, 25 mM phosphate buffer, pH* 7.0 100 mM NaCl	99% D2O	100 mM salt, 25 mM phosphate buffer	7.4	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	600
2	Varian	INOVA	750
3	Varian	INOVA	800

NMR Refinement
Method	Details	Software
distance geometry and simulated annealing	504 NOE-derived distance restraints, 56 H-bond restraints (2 per H-bond), 89 dihedral restraints (50 phi, 39 psi)	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	structures with the least restraint violations,structures with the lowest energy
Conformers Calculated Total Number	24
Conformers Submitted Total Number	20
Representative Model	1 (closest to the average,fewest violations,lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	X-PLOR	3.84	Brunger
2	processing	Felix	98	MSI
3	collection	VNMR		Varian
4	refinement	X-PLOR	3.84	Brunger