1CE3

PUTATIVE ANCESTRAL PROTEIN ENCODED BY A SINGLE SEQUENCE REPEAT OF THE MULTIDOMAIN PROTEINASE INHIBITOR FROM NICOTIANA ALATA

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	DQFCOSY	1 mM peptide	90% H2O/10% D2O		5.8	1 atm	313
2	ECOSY	1 mM peptide	90% H2O/10% D2O		5.8	1 atm	313
3	TOCSY	1 mM peptide	90% H2O/10% D2O		5.8	1 atm	313
4	NOESY	1 mM peptide	90% H2O/10% D2O		5.8	1 atm	313

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

NMR Refinement
Method	Details	Software
simulated annealing	REFINEMENT DETAILS CAN BE FOUND IN THE STRUCTURE CITATION ABOVE	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	LEAST RESTRAINT VIOLATIONS AND LOWEST ENERGY
Conformers Calculated Total Number	50
Conformers Submitted Total Number	20

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR	3.85	BRUNGER
2	structure calculation	XEASY		Bartels et al.
3	structure calculation	DYANA		Guntert, Braun and Wuthrich
4	structure calculation	X-PLOR		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 R01GM133198.