1S2H

The Mad2 spindle checkpoint protein possesses two distinct natively folded states

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	HNCA, HN(CO)CA, HN(CA)CB, HN(COCA)CB	0.8mM Mad2 protein U-15N,13C,2H	90% H2O, 10% D2O; 50mM phosphate buffer; 0.3M KCl; 1mM DTT	0.3M KCl	6.8	ambient	303
2	3D_15N-separated_NOESY	0.8mM Mad2 protein U-15N	90% H2O, 10% D2O; 50mM phosphate buffer; 0.3M KCl; 1mM DTT	0.3M KCl	6.8	ambient	303
3	3D_13C-separated_NOESY	0.8mM Mad2 protein U-15N,13C	90% H2O, 10% D2O; 50mM phosphate buffer; 0.3M KCl; 1mM DTT	0.3M KCl	6.8	ambient	303

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

NMR Refinement
Method	Details	Software
torsion angle dynamics	The structures are based on a total of 2866 restraints, 2323 are NOE-derived distance constraints, 339 dihedral angle restraints,204 distance restraints from hydrogen bonds.	CNS

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	500
Conformers Submitted Total Number	1
Representative Model	1 (lowest energy)

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

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	CNS	1.0	Brunger, A.T.
2	processing	NMRPipe	1.8	Delaglio, F.
3	collection	VNMR	6.1	Varian
4	data analysis	NMRView	4.1.2	Johnson, B.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.