2KVM

Solution structure of the CBX7 chromodomain in complex with a H3K27me2 peptide

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N HSQC	0.5 mM [U-100% 15N] CBX7 chromodomain, 0.75 mM H3K27me2 peptide, 4.3 mM sodium phosphate, 1.4 mM potassium phosphate, 5 mM DTT, 137 mM sodium chloride, 3 mM potassium chloride	90% H2O/10% D2O	140	7.4	ambient	298
2	2D 1H-13C HSQC	0.5 mM [U-100% 13C; U-100% 15N] CBX7 chromodomain, 0.75 mM H3K27me2 peptide, 4.3 mM sodium phosphate, 1.4 mM potassium phosphate, 5 mM DTT, 137 mM sodium chloride, 3 mM potassium chloride	90% H2O/10% D2O	140	7.4	ambient	298
3	2D 1H-1H TOCSY	0.5 mM H3K27me2 peptide, 4.3 mM sodium phosphate, 1.4 mM potassium phosphate, 5 mM DTT, 137 mM sodium chloride, 3 mM potassium chloride	90% H2O/10% D2O	140	7.4	ambient	298
4	3D HNCACB	0.5 mM [U-100% 13C; U-100% 15N] CBX7 chromodomain, 0.75 mM H3K27me2 peptide, 4.3 mM sodium phosphate, 1.4 mM potassium phosphate, 5 mM DTT, 137 mM sodium chloride, 3 mM potassium chloride	90% H2O/10% D2O	140	7.4	ambient	298
5	3D HN(COCA)CB	0.5 mM [U-100% 13C; U-100% 15N] CBX7 chromodomain, 0.75 mM H3K27me2 peptide, 4.3 mM sodium phosphate, 1.4 mM potassium phosphate, 5 mM DTT, 137 mM sodium chloride, 3 mM potassium chloride	90% H2O/10% D2O	140	7.4	ambient	298
6	3D 1H-15N NOESY	0.5 mM [U-100% 15N] CBX7 chromodomain, 0.75 mM H3K27me2 peptide, 4.3 mM sodium phosphate, 1.4 mM potassium phosphate, 5 mM DTT, 137 mM sodium chloride, 3 mM potassium chloride	90% H2O/10% D2O	140	7.4	ambient	298
7	3D 1H-13C NOESY	0.5 mM [U-100% 13C; U-100% 15N] CBX7 chromodomain, 0.75 mM H3K27me2 peptide, 4.3 mM sodium phosphate, 1.4 mM potassium phosphate, 5 mM DTT, 137 mM sodium chloride, 3 mM potassium chloride	90% H2O/10% D2O	140	7.4	ambient	298
8	3D HCCH-TOCSY	0.5 mM [U-100% 13C; U-100% 15N] CBX7 chromodomain, 0.75 mM H3K27me2 peptide, 4.3 mM sodium phosphate, 1.4 mM potassium phosphate, 5 mM DTT, 137 mM sodium chloride, 3 mM potassium chloride	90% H2O/10% D2O	140	7.4	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DRX	500
2	Bruker	AVANCE	800
3	Bruker	DRX	600

NMR Refinement
Method	Details	Software
simulated annealing, torsion angle dynamics		ARIA

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	200
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	chemical shift assignment	ARIA	2.0	Linge, O'Donoghue and Nilges
2	structure solution	ARIA	2.0	Linge, O'Donoghue and Nilges
3	refinement	CNS	1.1	Brunger, Adams, Clore, Gros, Nilges and Read
4	data analysis	TALOS		Cornilescu, Delaglio and Bax
5	processing	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
6	chemical shift assignment	NMRView		Johnson, One Moon Scientific
7	peak picking	NMRView		Johnson, One Moon Scientific