1FR0

SOLUTION STRUCTURE OF THE HISTIDINE-CONTAINING PHOSPHOTRANSFER DOMAIN OF ANAEROBIC SENSOR KINASE ARCB FROM ESCHERICHIA COLI.

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	1.5mM HPtArcB, 50mM KH2PO4-K2HPO4 (pH6.5 at 37deg), 50mM KCl, and 1mM dithiothreitol (DTT) in 99.8% D2O	99.8% D2O	100mM	6.5	ambient	310
2	3D_13C-separated_NOESY	1.5mM HPtArcB, 50mM KH2PO4-K2HPO4 (pH6.5 at 37deg), 50mM KCl, and 1mM dithiothreitol (DTT) in 99.8% D2O	99.8% D2O	100mM	6.5	ambient	310
3	3D_15N-separated_NOESY	1.5mM HPtArcB, 50mM KH2PO4-K2HPO4 (pH6.5 at 37deg), 50mM KCl, and 1mM dithiothreitol (DTT) in 90% H2O/10% D2O	90% H2O/10% D2O	100mM	6.5	ambient	310
4	4D_13C-separated_NOESY	1.5mM HPtArcB, 50mM KH2PO4-K2HPO4 (pH6.5 at 37deg), 50mM KCl, and 1mM dithiothreitol (DTT) in 99.8% D2O	99.8% D2O	100mM	6.5	ambient	310
5	HMQC-J	1.5mM HPtArcB, 50mM KH2PO4-K2HPO4 (pH6.5 at 37deg), 50mM KCl, and 1mM dithiothreitol (DTT) in 90% H2O/10% D2O	90% H2O/10% D2O	100mM	6.5	ambient	310

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DRX	500
2	Bruker	DMX	500

NMR Refinement
Method	Details	Software
simulated annealing	The structures are based on a total of 1348 restraints, 1188 are NOE-derived distance constraints, 83 dihedral angle restraints,77 distance restraints from hydrogen bonds.	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	30
Representative Model	1 (lowest energy)

Additional NMR Experimental Information
Details	The structure was determined using triple-resonance NMR spectroscopy.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR	3.851	Bruenger
2	structure solution	DYANA	1.5	Guentert
3	collection	XwinNMR	2.0	Bruker
4	processing	NMRPipe	1.7	Delaglio
5	data analysis	nmrPipp	4.2.4	Garrett
6	data analysis	MOLMOL	2.3	Koradi

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.