1JBN

Solution structure of an acyclic permutant of SFTI-1, A trypsin inhibitor from sunflower seeds

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	1mM 14/1-lSFTI-1	20mM sodium phosphate, pH4.5, 20% trifluoroethanol, 10%D2O	20mM	4.5	ambient	273
2	DQF-COSY	1mM 14/1-lSFTI-1	20mM sodium phosphate, pH4.5, 20% trifluoroethanol, 10%D2O	20mM	4.5	ambient	273
3	2D NOESY	1mM 14/1-lSFTI-1	20mM sodium phosphate, pH4.5, 20% trifluoroethanol, 80%D2O	20mM	4.5	ambient	273
4	E-COSY	1mM 14/1-lSFTI-1	20mM sodium phosphate, pH4.5, 20% trifluoroethanol, 80%D2O	20mM	4.5	ambient	273

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DMX	750
2	Bruker	ARX	500

NMR Refinement
Method	Details	Software
simulated annealing and refinement with modified CSDX force field	162 distance constraints, 73 sequential, 18 medium range, 68 long range, 6 chi1 angle constraints, 7 phi angle constraints	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the least restraint violations,structures with the lowest energy
Conformers Calculated Total Number	50
Conformers Submitted Total Number	20

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

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	2.6	Bruker
2	processing	XwinNMR	2.6	Bruker
3	data analysis	CCNMR		Cieslar et al.
4	structure solution	X-PLOR	3.851	Brunger
5	refinement	X-PLOR	3.851	Brunger

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.