2JNW

Solution structure of a ERCC1-XPA heterodimer

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	HNCA	0.25 mM [U-100% 13C; U-100% 15N] ERCC1, 20 mM Tris-HCl pH 7.2, 50 mM NaCl, 2 mM beta-mercaptoethanol, 0.1 mM EDTA, 90% H2O, 10% D2O	90% H2O/10% D2O	0.05	7.2	ambient	295
2	HN(CO)CA	0.25 mM [U-100% 13C; U-100% 15N] ERCC1, 20 mM Tris-HCl pH 7.2, 50 mM NaCl, 2 mM beta-mercaptoethanol, 0.1 mM EDTA, 90% H2O, 10% D2O	90% H2O/10% D2O	0.05	7.2	ambient	295
3	HN(CA)CB	0.25 mM [U-100% 13C; U-100% 15N] ERCC1, 20 mM Tris-HCl pH 7.2, 50 mM NaCl, 2 mM beta-mercaptoethanol, 0.1 mM EDTA, 90% H2O, 10% D2O	90% H2O/10% D2O	0.05	7.2	ambient	295
4	HN(COCA)CB	0.25 mM [U-100% 13C; U-100% 15N] ERCC1, 20 mM Tris-HCl pH 7.2, 50 mM NaCl, 2 mM beta-mercaptoethanol, 0.1 mM EDTA, 90% H2O, 10% D2O	90% H2O/10% D2O	0.05	7.2	ambient	295
5	HNCO	0.25 mM [U-100% 13C; U-100% 15N] ERCC1, 20 mM Tris-HCl pH 7.2, 50 mM NaCl, 2 mM beta-mercaptoethanol, 0.1 mM EDTA, 90% H2O, 10% D2O	90% H2O/10% D2O	0.05	7.2	ambient	295
6	HN(CA)CO	0.25 mM [U-100% 13C; U-100% 15N] ERCC1, 20 mM Tris-HCl pH 7.2, 50 mM NaCl, 2 mM beta-mercaptoethanol, 0.1 mM EDTA, 90% H2O, 10% D2O	90% H2O/10% D2O	0.05	7.2	ambient	295

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	600
2	Bruker	AVANCE	750

NMR Refinement
Method	Details	Software
simulated annealing	XPLOR-NIH was used. In the refinement, low-resolution X-ray diffraction data was used as well. ERCC1 structure was taken from the related PDB entry and tight geometrical restraints were imposed on ERCC1 geometry.	X-PLOR NIH

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	10
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR NIH		NIH