1IIO

NMR-Based Structure of the Conserved Protein MTH865 from the Archea Methanobacterium thermoautotrophicum

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_15N-separated_NOESY	0.5mM MTH865 U-15N; 50mM PO4 buffer, 50mM NaCl, 5mM DTT, 3mM NaN3	90% H2O/10% D2O	50mM NaCl	6.51	ambient	303
2	4D_13C/15N-separated_NOESY	0.5mM MTH865 U-15N,13C; 50mM PO4 buffer, 50mM NaCl, 5mM DTT, 3mM NaN3	90% H2O/10% D2O	50mM NaCl	6.51	ambient	303
3	2D_NOESY	0.5mM MTH865 U-15N,10%-13C; 50mM PO4 buffer, 50mM NaCl, 5mM DTT, 3mM NaN3	99% D2O	50mM NaCl	6.51	ambient	303
4	3D_13C-separated_methyl-methyl_NOESY	0.5mM MTH865 U-15N,13C; 50mM PO4 buffer, 50mM NaCl, 5mM DTT, 3mM NaN3	90% H2O/10% D2O	50mM NaCl	6.51	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	UNITY	500
2	Varian	INOVA	800
3	Varian	INOVA	600

NMR Refinement
Method	Details	Software
molecular dynamics, simulated annealing	1492 UNAMBIGUOUS AND 544 AMBIGUOUS ARIA-DERIVED NOE RESTRAINTS (BASED ON 17 ITERATIONS) WERE USED FOR THE STRUCTURE CALCULATION AND REFINEMENT. 50 PAIRS OF PHI AND PSI DIHEDRAL ANGLE AND 26 PAIRS OF HYDROGEN-BOND RESTRAINTS WERE ALSO INCLUDED IN THE CALCULATIONS. DIHEDRAL ANGLE RESTRAINTS WERE CALCULATED USING TALOS, WHILE HYDROGEN BOND RESTRAINTS WERE DERIVED FROM A 15/1H-HSQC H2O-D2O EXCHANGE STUDY. THE STRUCTURE ENSEMBLE INCLUDES THREE ADDITIONAL RESIDUES AT THE N-TERMINUS (GLY-SER-HIS), RESULTING FROM THE PROTEOLYTIC CLEAVAGE OF A HIS6 AFFINITY TAG. RESIDUE NUMBERING BEGINS WITH GLY-3 AND ENDS WITH LEU81	VNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	50
Conformers Submitted Total Number	25
Representative Model	1 (lowest energy)

Additional NMR Experimental Information
Details	The backbone and sidechain chemical shifts were assigned manually using standard 3D heternuclear techniques.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1b	Varian, Inc.
2	processing	Felix	95.0 and 2000	Molecular Simulations, Inc.
3	data analysis	Felix	95.0 and 2000	Molecular Simulations, Inc.
4	structure solution	ARIA/CNS	1.0	Nilges, M. (ARIA); Brunger, A. (CNS)
5	refinement	ARIA/CNS	1.0	Nilges, M. (ARIA); Brunger, A. (CNS)
6	data analysis	TALOS	1.0	Cornilescu, F., Delaglio, F., Bax, A.

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 R01GM157729.