1MX7

Two homologous rat cellular retinol-binding proteins differ in local structure and flexibility

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_13C-separated_NOESY	1.0mM ligand free cellular retinol-binding protein I U-[99% 15N, 99% 13C]; 20mM phosphate buffer, 50mM potassium chloride, 0.05% sudium azide, 5mM beta-mecaptoethanol-d6; 99.5% D2O	99.5% D2O	0.34	7.4	ambient	298
2	3D_15N-separated_NOESY	1.0mM ligand free cellular retinol-binding protein I U-[99% 15N]; 20mM phosphate buffer, 50mM potassium chloride, 0.05% sudium azide, 5mM beta-mecaptoethanol-d6; 95% H2O, 5% D2O	95% H2O/5% D2O	0.34	7.4	ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	500
2	Varian	INOVA	600
3	Varian	UNITYPLUS	500
4	Varian	UNITY	600

NMR Refinement
Method	Details	Software
distance geometry simulated annealing		VNMR

NMR Ensemble Information
Conformer Selection Criteria	target function
Conformers Calculated Total Number	25
Conformers Submitted Total Number	22
Representative Model	1 (closest to the average)

Additional NMR Experimental Information
Details	Triple resonance experiments for the 1H, 15N and 13C resonance assignments included the following: HNCO CBCACONNH HNCACB CBCACOCAHA HCCH-TOCSY 15N-resolved TOCSY-HSQC

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1	varian associates
2	processing	VNMR	6.1	varian associates
3	data analysis	Felix	2000	molecular simulation inc.
4	structure solution	Tinker	3.3	Ponder, J.W.
5	refinement	Tinker	3.3	Ponder, J.W.

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.