1KLQ

The Mad2 Spindle Checkpoint Protein Undergoes Similar Major Conformational Changes upon Binding to Either Mad1 or Cdc20

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_15N-separated_NOESY	0.8mM Mad2 protein U-15N; 1mM MBP1 NA; 50mM phosphate buffer; 0.3M KCl; 1mM DTT	90% H2O/10% D2O	0.3M KCl	7.4	ambient	303
2	HNCA	0.8mM Mad2 protein U-15N, 13C, 2H; 1mM MBP1 NA; 50mM phosphate buffer; 0.3M KCl; 1mM DTT	90% H2O/10% D2O	0.3M KCl	7.4	ambient	303
3	3D_13C-separated_NOESY	0.8mM Mad2 protein U-15N, 13C; 1mM MBP1 NA; 50mM phosphate buffer; 0.3M KCl; 1mM DTT	90% H2O/10% D2O	0.3M KCl	7.4	ambient	303
4	3D_H(CC)(CO)NH	0.8mM Mad2 protein U-15N, 13C, U-60% 2H; 1mM MBP1 NA; 50mM phosphate buffer; 0.3M KCl; 1mM DTT	90% H2O/10% D2O	0.3M KCl	7.4	ambient	303
5	3D_15N-separated_NOESY	0.8mM MBP1 U-15N; 1mM Mad2 protein NA; 50mM phosphate buffer; 0.3M KCl; 1mM DTT	90% H2O/10% D2O	0.3M KCl	7.4	ambient	303
6	3D_13C-separated_NOESY	0.8mM MBP1 U-15N, 13C; 1mM Mad2 protein NA; 50mM phosphate buffer; 0.3M KCl; 1mM DTT	90% H2O/10% D2O	0.3M KCl	7.4	ambient	303
7	HN(CO)CA	0.8mM Mad2 protein U-15N, 13C, 2H; 1mM MBP1 NA; 50mM phosphate buffer; 0.3M KCl; 1mM DTT	90% H2O/10% D2O	0.3M KCl	7.4	ambient	303
8	3D_(H)C(C)(CO)NH	0.8mM Mad2 protein U-15N, 13C, U-60% 2H; 1mM MBP1 NA; 50mM phosphate buffer; 0.3M KCl; 1mM DTT	90% H2O/10% D2O	0.3M KCl	7.4	ambient	303
9	HN(COCA)CB	0.8mM Mad2 protein U-15N, 13C, 2H; 1mM MBP1 NA; 50mM phosphate buffer; 0.3M KCl; 1mM DTT	90% H2O/10% D2O	0.3M KCl	7.4	ambient	303
10	HN(CA)CB	0.8mM Mad2 protein U-15N, 13C, 2H; 1mM MBP1 NA; 50mM phosphate buffer; 0.3M KCl; 1mM DTT	90% H2O/10% D2O	0.3M KCl	7.4	ambient	303

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

NMR Refinement
Method	Details	Software
torsion angle dynamics	The structures are based on a total of 3124 restraints, 2535 are NOE-derived distance constraints, 363 dihedral angle restraints,226 distance restraints from hydrogen bonds.	CNS

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	1
Representative Model	1 (the best representative conformer)

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

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	CNS	0.9a	Brunger, A.T.
2	refinement	CNS	0.9a	Brunger, A.T.

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.