1UC6

Solution Structure of the Carboxyl Terminal Domain of the Ciliary Neurotrophic Factor Receptor

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_15N-separated_NOESY	2mM CNTFR-BC U-15N; 100mM NaCl, 10mM sodium phosphate, 0.1mM EDTA	90% H2O, 10% D2O, pH 6.5	100mM NaCl, 10mM sodium phosphate, 0.1mM EDTA	6.5	ambient	298
2	3D_13C-separated_NOESY	1.3mM CNTFR-BC U-15N,13C; 100mM NaCl, 10mM sodium phosphate, 0.1mM EDTA	90% H2O, 10% D2O, pH 6.5	100mM NaCl, 10mM sodium phosphate, 0.1mM EDTA	6.5	ambient	298
3	HNHA	1.3mM CNTFR-BC U-15N,13C; 100mM NaCl, 10mM sodium phosphate, 0.1mM EDTA	90% H2O, 10% D2O, pH 6.5	100mM NaCl, 10mM sodium phosphate, 0.1mM EDTA	6.5	ambient	298
4	nJ-HMQC	2mM CNTFR-BC U-15N; 100mM NaCl, 10mM sodium phosphate, 0.1mM EDTA	90% H2O, 10% D2O, pH 6.5	100mM NaCl, 10mM sodium phosphate, 0.1mM EDTA	6.5	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	750
2	Varian	INOVA	500

NMR Refinement
Method	Details	Software
simulated annealing	Following identification of the global fold from manual inspection of the nuclear Overhauser effect spectroscopy data, ambiguous NOE restraints were resolved using the iterative ARIA method (Nilges et al., 1997) and the structure was determined by simulated annealing using the CNS package.	VNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	21
Representative Model	1 (minimized average structure)

Additional NMR Experimental Information
Details	For determination of hydrogen bonds, amide protons exchanging slowly with deuterons were identified by time course 1H-15N HSQC experiments on a freeze-dried 15N-labelled sample of BC dissolved in D2O buffer.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1C	Varian
2	processing	NMRPipe	2.0	F. Delaglio
3	data analysis	PIPP	1.0	Garrett D
4	data analysis	Sparky	1.06	Goddard, T. D
5	structure solution	ARIA	1.1	Nilges, M.
6	structure solution	CNS	1.1	Brunger, A.T.
7	refinement	CNS	1.1

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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 R01GM157729.