1R4Y

SOLUTION STRUCTURE OF THE DELETION MUTANT DELTA(7-22) OF THE CYTOTOXIC RIBONUCLEASE ALPHA-SARCIN

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	2mM Ribonuclease; 90% H2O, 10% D2O	90% H2O/10% D2O		6.0	AMBIENT	308
2	2D TOCSY	2mM Ribonuclease; 90% H2O, 10% D2O	90% H2O/10% D2O		6.0	AMBIENT	308
3	2D NOESY	2mM Ribonuclease; D2O	D2O		6.0	AMBIENT	308
4	2D TOCSY	2mM Ribonuclease; D2O	D2O		6.0	AMBIENT	308

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	800
2	Bruker	AVANCE	600

NMR Refinement
Method	Details	Software
torsion angle dynamics	The structures are based on a total of 2088 restraints, 1990 NOE-derived distance constraints and 98 dihedral angle restraints. The best 25 representative conformers are energy-minimized with AMBER7	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	200
Conformers Submitted Total Number	25
Representative Model	1 (lowest energy)

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

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	3.1
2	processing	XwinNMR	3.1
3	data analysis	ANSIG	3.3	Kraulis, P.
4	structure solution	DYANA	1.5	Guntert, P.
5	refinement	DYANA	1.5	Guntert, P.
6	refinement	Amber	7

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 R01GM133198.