1ZW7

Elimination of the C-cap in Ubiquitin Structure, Dynamics and Thermodynamic Consequences

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	1H-15N HSQC	1-2 mM of appropriately labeled mutant ubiquitin	30 mM acetate buffer, pH 5.0	30 mM actate	5	Ambient	298
2	3D HNCACB	1-2 mM of appropriately labeled mutant ubiquitin	30 mM acetate buffer, pH 5.0	30 mM actate	5	Ambient	298
3	CBCA(CO)NH	1-2 mM of appropriately labeled mutant ubiquitin	30 mM acetate buffer, pH 5.0	30 mM actate	5	Ambient	298
4	HNCA	1-2 mM of appropriately labeled mutant ubiquitin	30 mM acetate buffer, pH 5.0	30 mM actate	5	Ambient	298
5	HNCO	1-2 mM of appropriately labeled mutant ubiquitin	30 mM acetate buffer, pH 5.0	30 mM actate	5	Ambient	298
6	HBHA(CO)NH	1-2 mM of appropriately labeled mutant ubiquitin	30 mM acetate buffer, pH 5.0	30 mM actate	5	Ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DMX	500
2	Bruker	DMX	600

NMR Refinement
Method	Details	Software
Structure calculations were performed using CNS version 1.0 on an SGI platform. The refinement protocol for annealing involved torsion angle heating (100 K, 1000 steps) followed by cooling in torsion (100 K, 5000 steps) and cartesian space (1000 K, 10,000 steps).		CNS

NMR Ensemble Information
Conformer Selection Criteria	back calculated data agree with experimental NOESY spectrum
Conformers Calculated Total Number	50
Conformers Submitted Total Number	21
Representative Model	1 (n/a)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	CNS	1.0	BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,READ,RICE,SIMONSON,WARREN
2	refinement	CNS	1.0	BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE-KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,READ,RICE,SIMONSON,WARREN