1DV9

STRUCTURAL CHANGES ACCOMPANYING PH-INDUCED DISSOCIATION OF THE B-LACTOGLOBULIN DIMER

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_13C-separated_NOESY	1mM B-lactoglobuline-15N,13C; 50mM phosphate buffer; 90% H2O, 10% D2O	90% H2O/10% D2O	not known	2.7	ambient	310
2	3D_15N-separated_NOESY	1mM B-lactoglobuline-15N,13C; 50mM phosphate buffer; 90% H2O, 10% D2O	90% H2O/10% D2O	not known	2.7	ambient	310

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	600

NMR Refinement
Method	Details	Software
simulated annealing	the structures are based on a total of 2715 restraints, out of which 77 are hydrogen bonds and 110 are torsion angles	Felix

NMR Ensemble Information
Conformer Selection Criteria	lowest total energy
Conformers Calculated Total Number	60
Conformers Submitted Total Number	21
Representative Model	14 (closest to the average)

Additional NMR Experimental Information
Details	The structure was determined using triple resonance NMR spectra

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	Felix	97.0	Molecular Simulations
2	processing	XEASY	1995	Bartels el al.
3	structure solution	X-PLOR	ARIA	Nilges el al.
4	structure solution	CNS	0.9	Brunger et al.
5	refinement	CNS	0.9	Brunger et al.

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.