1ND9

Solution Structure of the N-terminal Subdomain of Translation Initiation Factor IF2

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	2mM IF2 (res 2-157); 10 mM Phosphate buffer	90% H2O/10% D2O	10 mM Phosphate	6.0	ambient	298
2	2D NOESY	2mM IF2 (res 2-157); 10 mM Phosphate buffer	90% H2O/10% D2O	10 mM Phosphate	6.0	ambient	308
3	2D NOESY	2mM IF2 (res 2-157); 10 mM Phosphate buffer	100% D2O	10 mM Phosphate	6.0	ambient	298
4	3D_15N-separated_NOESY	2mM IF2 (res 2-157); 15N; 10 mM Phosphate buffer	90% H2O/10% D2O	10 mM Phosphate	6.0	ambient	298
5	3D_13C-separated_NOESY	2mM IF2 (res 2-157); 15N;13C; 10 mM Phosphate buffer	90% H2O/10% D2O	10 mM Phosphate	6.0	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	500

NMR Refinement
Method	Details	Software
simulated annealing	the structures are based on a total of 996 restraints, 918 are NOE-derived distance constraints, 63 dihedral angle restraints,15 distance restraints from hydrogen bonds.	Felix

NMR Ensemble Information
Conformer Selection Criteria	structures with acceptable covalent geometry,structures with favorable non-bond energy,structures with the least restraint violations,structures with the lowest energy
Conformers Calculated Total Number	20
Conformers Submitted Total Number	10

Additional NMR Experimental Information
Details	The structure was determined using triple-resonance NMR spectroscopy

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	Felix	1.0	Hare Research Inc.
2	processing	NMRPipe	1.0	Delaglio, F., Grzesiek, S., Vuister, G.W., Zhu, G., Pfeifer, J. and Bax, A
3	structure solution	CNS	1.1	Brunger, A.T., Adams, P.D., Clore, G.M., DeLano, W.L., Gros, P., Grosse-Kunstleve, R.W., Jiang, J.S., Kuszewski, J., Nilges, M., Pannu, N.S., Read, R.J., Rice, L.M., Simonson, T. and Warren, G.L.
4	refinement	CNS	1.1	Brunger, A.T., Adams, P.D., Clore, G.M., DeLano, W.L., Gros, P., Grosse-Kunstleve, R.W., Jiang, J.S., Kuszewski, J., Nilges, M., Pannu, N.S., Read, R.J., Rice, L.M., Simonson, T. and Warren, G.L.

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.