2N2K

Ensemble structure of the closed state of Lys63-linked diubiquitin in the absence of a ligand

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	transverse relaxation rate measurement	0.5 mM [U-100% 15N] N25C_MTS protein-1, 10 % v/v [U-99% 2H] D2O-2, 100 mM sodium chloride-3, 10 mM sodium acetate-4	90% H2O/10% D2O	100	6.0	ambient	303
2	transverse relaxation rate measurement	0.5 mM [U-100% 15N] K48C_MTS protein-5, 10 % v/v [U-99% 2H] D2O-6, 100 mM sodium chloride-7, 10 mM sodium acetate-8	90% H2O/10% D2O	100	6.0	ambient	303
3	transverse relaxation rate measurement	1 mM [U-100% 15N] N25C_MTS mixture protein-9, 10 % v/v [U-99% 2H] D2O-10, 100 mM sodium chloride-11, 10 mM sodium acetate-12	90% H2O/10% D2O	100	6.0	ambient	303
4	transverse relaxation rate measurement	1 mM [U-100% 15N] K48C_MTS mixture protein-13, 10 % v/v [U-99% 2H] D2O-14, 100 mM sodium chloride-15, 10 mM sodium acetate-16	90% H2O/10% D2O	100	6.0	ambient	303
5	2D 1H-15N HSQC	0.5 mM [U-100% 15N] 15N_distal-14N_proximal-17, 10 % v/v [U-99% 2H] D2O-18, 100 mM sodium chloride-19, 10 mM sodium acetate-20	90% H2O/10% D2O	100	6.0	ambient	303
6	2D 1H-15N HSQC	0.5 mM [U-100% 15N] 14N_distal-15N_proximal-21, 10 % v/v [U-99% 2H] D2O-22, 100 mM sodium chloride-23, 10 mM sodium acetate-24	90% H2O/10% D2O	100	6.0	ambient	303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	600
2	Bruker	AVANCE	850

NMR Refinement
Method	Details	Software
simulated annealing, torsion angle dynamics		X-PLOR NIH

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	80
Conformers Submitted Total Number	70
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore
2	refinement	X-PLOR NIH		Schwieters, Kuszewski, Tjandra and Clore