1IRY

Solution structure of the hMTH1, a nucleotide pool sanitization enzyme

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_15N-separated_NOESY	1.7mM hMTH1 U-15N,13C; 50mM K-phosphate buffer, 20mM KCl, 0.1mM EDTA and 1mM DTT; 95% H2O, 5% D2O	95% H2O/5% D2O	70	6.9	ambient	303
2	4D_13C/15N-separated_NOESY	1.7mM hMTH1 U-15N,13C; 50mM K-phosphate buffer, 20mM KCl, 0.1mM EDTA and 1mM DTT; 95% H2O, 5% D2O	95% H2O/5% D2O	70	6.9	ambient	303
3	HNHA	1.7mM hMTH1 U-15N,13C; 50mM K-phosphate buffer, 20mM KCl, 0.1mM EDTA and 1mM DTT; 95% H2O, 5% D2O	95% H2O/5% D2O	70	6.9	ambient	303
4	4D_13C-separated_NOESY	1.7mM hMTH1 U-15N,13C; 50mM K-phosphate buffer, 20mM KCl, 0.1mM EDTA and 1mM DTT; 99.8% D2O	99.8% D2O	70	6.9	ambient	303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DMX	500
2	Bruker	DRX	800

NMR Refinement
Method	Details	Software
simulated annealing	The structures are based on a total of 2312 restraints, 2043 are NOE-derived distance constraints, 177 dihedral angle restraints,92 distance restraints from hydrogen bonds detected through 3hJNC.	DYANA

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	STEREOSPECIFIC ASSIGNMENTS OF THE METHYL GROUPS OF THE LEUCINE AND VALINE RESIDUES WERE ACHIEVED WITH 15% FRACTIONALLY 13C-LABELED hMTH1 DISSOLVED IN 99.8% D2O.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	DYANA	1.5	Guentert, P.
2	processing	NMRPipe	1.8	Delaglio, F.
3	collection	XwinNMR	2.6	Bruker
4	refinement	CNS	1.0	Brunger, A.T.
5	data analysis	NMRpipp	4.2.4	Garrett, D.