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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.