1I8C

SOLUTION STRUCTURE OF THE WATER-SOLUBLE FRAGMENT OF RAT HEPATIC APOCYTOCHROME B5

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_13C-separated_NOESY	1 mM apocytochrome b5, 13C,15N	90% H2O/10% D2O	low	6.2	ambient	298
2	3D_15N-separated_NOESY	1 mM apocytochrome b5, 15N	90% H2O/10% D2O	low	6.2	ambient	298
3	2D-NOESY	2 mM apocytochrome b5	90% H2O/10% D2O	low	6.2	ambient	298
4	2D-NOESY	2 mM apocytochrome b5	100% D2O	low	6.2	ambient	298

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

NMR Refinement
Method	Details	Software
distance geometry simulated annealing molecular dynamics	His 26, 27, 39, 63, and 80 were protonated at the NE2 position in accordance to 15N NMR data. His 15 has a high pK and was protonated at the ND1 and NE2 positions. Additional details are provided in the primary citation.	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	1

Additional NMR Experimental Information
Details	The amino acid sequence numbering follows the bovine scheme, with the first four residues given negative values. These four residues are disordered and not included in the coordinates.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	2.5	Bruker
2	processing	Felix	97	MSI
3	data analysis	Felix	97	MSI
4	structure solution	X-PLOR	3.851	Brunger
5	refinement	X-PLOR	3.851	Brunger

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.