1UAO

NMR Structure of designed protein, Chignolin, consisting of only ten amino acids (Ensembles)

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	2mM CHIGNOLIN	95% H2O/5% D2O	20mM sodium phosohate	5.5	AMBIENT	277
2	2D ROESY	2mM CHIGNOLIN	95% H2O/5% D2O	20mM sodium phosohate	5.5	AMBIENT	277
3	DQF-COSY	2mM CHIGNOLIN	95% H2O/5% D2O	20mM sodium phosohate	5.5	AMBIENT	277
4	2D TOCSY	2mM CHIGNOLIN	95% H2O/5% D2O	20mM sodium phosohate	5.5	AMBIENT	277

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AMX	500

NMR Refinement
Method	Details	Software
simulated annealing	The structures are based on a total of 185 restraints, 172 are NOE-derived distance constraints, 12 dihedral angle restraints,1 distance restraints from hydrogen bonds.	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	50
Conformers Submitted Total Number	18
Representative Model	1 (lowest energy)

Additional NMR Experimental Information
Details	This structure was determined using standard 2D Homonuclear techniques.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	2.6
2	processing	Felix	2000
3	structure solution	X-PLOR	3.1
4	refinement	X-PLOR	3.1

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.