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SOLUTION STRUCTURE OF THE THETA SUBUNIT OF DNA POLYMERASE III
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
3D_15N-separated_NOESY
1 mM Theta subunit U-15N; 10 mM phosphate buffer pH 6.5;
90% H2O/10% D2O
0.03
6.5
aambient
298
2
3D_15N-separated_TOCSY
1 mM Theta subunit U-15N; 10 mM phosphate buffer pH 6.5;
90% H2O/10% D2O
0.03
6.5
aambient
298
3
HNHA
1 mM Theta subunit U-15N; 10 mM phosphate buffer pH 6.5;
90% H2O/10% D2O
0.03
6.5
aambient
298
4
HNHB
1 mM Theta subunit U-15N; 10 mM phosphate buffer pH 6.5;
90% H2O/10% D2O
0.03
6.5
aambient
298
5
3D_13C-separated_NOESY
1 mM Theta subunit U-15N,13C; 10 mM phosphate buffer, pH 6.5
90% H2O/10% D2O
0.03
6.5
ambient
298
6
2D NOESY
1 mM Theta subunit; 10 mM phosphate buffer pH 6.5;
100% D2O
0.03
6.5
ambient
298
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Varian
INOVA
600
2
Varian
VXRS
500
3
Varian
INOVA
500
NMR Refinement
Method
Details
Software
torsion angle dynamics
The structures are based on 819 restraints, 511 are NOE-derived distance constraints, 300 dihedral angle restraints and 8 distance restraints from hydrogen bonds
VNMR
NMR Ensemble Information
Conformer Selection Criteria
target function
Conformers Calculated Total Number
400
Conformers Submitted Total Number
20
Representative Model
1 (fewest violations)
Additional NMR Experimental Information
Details
The structure was determined by double and triple resonance heteronuclear NMR spectroscopy techniques. There is evidence of substantial conformational exchange in sections of the chain that severely limit the precision of the structure in these regions of the molecule. Specifically, conformational exchange occurs in the regions D19-M33 and L55-S63.