2FV4

NMR solution structure of the yeast kinetochore Spc24/Spc25 globular domain

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	TROSY versions of HNCA, HNCACB and HNCO; 3D 15N-TOCSY-HSQC.	1.5 mM spc25G U-15N,13C,85%-2H, 1.5 mM spc24G natural abundance isotopes, 95% H2O, 5% D2O	50 mM Phosphate buffer Na, pH 7.0, 1 mM azide, 95% H2O, 5% D2O.	50 mM sodium phosphate buffer	7.0	ambient	303
2	TROSY versions of HNCA, HNCACB and HNCO; 3D 15N-TOCSY-HSQC.	1.5 mM spc25G natural abundance isotopes, 1.5 mM spc24G U-15N,13C,85%-2H, 95% H2O, 5% D2O	50 mM Phosphate buffer Na, pH 7.0, 1 mM azide, 95% H2O, 5% D2O.	50 mM sodium phosphate buffer	7.0	ambient	303
3	3D 15N-NOESY, 3D 13C-NOESY, and 3D 15N-edited 13C-filtered NOESY; 2D spin echo difference experiments for measuring three-bond J(C'C) and J(NC); standard HNCO-based 3D experiments for measuring one-bond J(NH) and J(C'CA).	1.5 mM spc25G U-15N,13C, 1.5 mM spc24G natural abundance isotopes, 95% H2O, 5% D2O	50 mM Phosphate buffer Na, pH 7.0, 1 mM azide, 95% H2O, 5% D2O.	50 mM sodium phosphate buffer	7.0	ambient	303
4	3D 15N-NOESY, 3D 13C-NOESY, and 3D 15N-edited 13C-filtered NOESY; 2D spin echo difference experiments for measuring three-bond J(C'C), J(NC) and J(CC); standard HNCO-based 3D experiments for measuring one-bond J(NH).	1.5 mM spc25G natural abundance isotopes, 1.5 mM spc24G U-15N,13C, 95% H2O, 5% D2O	50 mM Phosphate buffer Na, pH 7.0, 1 mM azide, 95% H2O, 5% D2O.	50 mM sodium phosphate buffer	7.0	ambient	303
5	Standard HNCO-based 3D experiments for measuring residual one-bond D(NH) and D(C'CA).	1.5 mM spc25G U-15N,13C, 85%-2H, 1.5 mM spc24G natural abundance isotopes, 50 mg/mL Pf1 phage, 95% H2O, 5% D2O	50 mM Phosphate buffer Na, pH 7.0, 1 mM azide, 95% H2O, 5% D2O.	50 mM sodium phosphate buffer	7.0	ambient	303
6	Standard HNCO-based 3D experiments for measuring residual one-bond D(NH).	1.5 mM spc25G natural abundance isotopes, 1.5 mM spc24G U-15N,13C, 50 mg/mL Pf1 phage, 95% H2O, 5% D2O	50 mM Phosphate buffer Na, pH 7.0, 1 mM azide, 95% H2O, 5% D2O.	50 mM sodium phosphate buffer	7.0	ambient	303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	600

NMR Refinement
Method	Details	Software
simulated annealing		NMRPipe

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	30
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	NMRPipe	1.0	Frank Delaglio
2	data analysis	CARA	1.2	Rochus Keller
3	refinement	Xplor-NIH	2.11	Charles Schwieters