1N9U

Differences and Similarities in Solution Structures of Angiotensin I & II: Implication for Structure-Function Relationship

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	DQF-COSY	2.5 mM; DMSO-d6	DMSO-d6			ambient	298
2	2D TOCSY	2.5 mM; DMSO-d6	DMSO-d6			ambient	298
3	2D NOESY	2.5 mM; DMSO-d6	DMSO-d6			ambient	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DPX	400

NMR Refinement
Method	Details	Software
simulated annealing, torsion angle dynamics	This structure is based on a 225 NOE-derived distance constraints, 7 dihedral angle restraints, 1 distance restraint from hydrogen bond	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	target function for models 1-20, mean energy minimized for model 21
Conformers Calculated Total Number	300
Conformers Submitted Total Number	21
Representative Model	21 (n/a)

Additional NMR Experimental Information
Details	This structure was determined using standard 2D homonuclear techniques. Models 1-20 are the family ensemble, while model 21 is the minimized average structure derived from that ensemble.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	2.6
2	processing	XwinNMR	2.6
3	data analysis	XEASY	1.3	Tai-he Xia, Christian Bartels, Kurt Wuthtrich
4	structure solution	DYANA	1.5	Peter Guntert, Christian Mumenthaler, Kurt Wuthrich
5	refinement	Amber	5.0	KOLLMAN, CASE, MERZ, CHEATHAM, SIMMERLING, DARDEN, PEARLMAN

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.