Experiment: 2AXD

solution structure of the theta subunit of escherichia coli DNA polymerase III in complex with the epsilon subunit

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_15N-separated_NOESY	1MM THETA-EPSILON186 U15N,13C(THETA); 100mM NaCl, 0.1mM DITHIOTHREITOL; 20mM PHOSPHATE BUFFER Na; 90% H20, 10% D2O	90% H20, 10% D2O	100mM NaCl	7.0	ambient	298
2	3D_15N-separated_NOESY	1MM THETA-EPSILON186 U15N,13C(THETA); 100mM NaCl, 0.1mM DITHIOTHREITOL; 20mM TRIS BUFFER; 90% H20, 10% D2O	90% H20, 10% D2O	100mM NaCl	7.0	ambient	298
3	3D_13C-separated_NOESY	1MM THETA-EPSILON186 U15N,13C(THETA); 100mM NaCl, 0.1mM DITHIOTHREITOL; 20mM PHOSPHATE BUFFER Na; 90% H20, 10% D2O	90% H20, 10% D2O	100mM NaCl	7.0	ambient	298
4	3D_13C-separated_NOESY	1MM THETA-EPSILON186 U15N,13C(THETA); 100mM NaCl, 0.1mM DITHIOTHREITOL; 20mM TRIS BUFFER; 90% H20, 10% D2O	90% H20, 10% D2O	100mM NaCl	7.0	ambient	298
5	HNHA	1MM THETA-EPSILON186 U15N,13C(THETA); 100mM NaCl, 0.1mM DITHIOTHREITOL; 20mM PHOSPHATE BUFFER Na; 90% H20, 10% D2O	90% H20, 10% D2O	100mM NaCl	7.0	ambient	298
6	2D_15N-HSQC	1MM THETA-EPSILON186 U15N,13C(THETA); 100mM NaCl, 0.1mM DITHIOTHREITOL; 20mM TRIS BUFFER; 90% H20, 10% D2O	90% H20, 10% D2O	100mM NaCl	7.0	ambient	298

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

NMR Refinement
Method	Details	Software
torsion angle dynamics	THE STRUCTURES ARE BASED ON 632 DISTANCE RESTRAINTS, 111 DIHEDRAL ANGLE RESTRAINTS AND 162 PSEUDO-CONTACT SHIFT RESTRAINTS. THE PSEUDO-CONTACT SHIFTS WERE CALCULATED FROM THE CHANGE IN CHEMICAL SHIFT OF THE AMIDE PROTONS INDUCED BY INSERTING A LANTHANIDE ION (EITHER YSPROSIUM, ERBIUM OR HOLMIUM) AT THE METAL BINDING SITE OF EPSILON-186 WHICH IS COMPLEXED TO THE THETA SUBUNIT. XPLOR-NIH 2.9.7 WAS USED TO REFINE THE STRUCTURE USING THIS DATA	VNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	200
Conformers Submitted Total Number	12
Representative Model	1 (lowest energy)

Additional NMR Experimental Information
Details	THE STRUCTURE WAS DETERMINED USING DISTANCE AND ANGULAR RESTRAINTS AND SUPPLEMENTED WITH RESTRAINTS CALCULATED FROM PSEUDO-CONTACT SHIFTS INDUCED BY INSERTING A LANTHANIDE ION INTO THE EPSILON186 BINDING POCKET

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1	VARIAN ASSOCIATES
2	data analysis	XEASY	1.4	C.BARTELS, T.XIA, M.BILLETER, P.GUENTERT, K.WUETHRICH
3	data analysis	Sparky	3.110	T.GODDARD, D.KNELLER
4	refinement	DYANA	1.5	P.GUENTERT
5	refinement	XPLOR-NIH	2.9.7	C.SCHWIETERS, N.TJANDRA, J.KUSZEWSKI, G.CLORE