2DCX

NMR solution structure of the Dermaseptin antimicrobial peptide analog NC12-K4S4(1-13)a

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	DQF-COSY	2.2mM peptide; 20:1 molar ratio of DPC-d38 (Cambridge Isotope Laboratories, Inc., USA); 0.02% NaN3	90% of 10% strength PBS solution, 10% D2O	78 mM	7.4	ambient	303
2	2D TOCSY	2.2mM peptide; 20:1 molar ratio of DPC-d38 (Cambridge Isotope Laboratories, Inc., USA); 0.02% NaN3	90% of 10% strength PBS solution, 10% D2O	78 mM	7.4	ambient	303
3	2D NOESY	2.2mM peptide; 20:1 molar ratio of DPC-d38 (Cambridge Isotope Laboratories, Inc., USA); 0.02% NaN3	90% of 10% strength PBS solution, 10% D2O	78 mM	7.4	ambient	303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DMX	600

NMR Refinement
Method	Details	Software
Distance Geometry, Simulated Annealing	The structures are derived from 241 NOE constraints; 109 intraresidual; 44 i+1; 19 i+2; 39 i+3; 30 long-range.	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy, structures with the least restraint violations
Conformers Calculated Total Number	50
Conformers Submitted Total Number	15
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR	3.1	Bruker
2	processing	XwinNMR	3.1	Bruker
3	data analysis	Sparky	3	Goddard and Kneller
4	structure solution	X-PLOR	3.856	Nilges, Kuszewski and Brnger
5	data analysis	Procheck		Laskowski, Rullmannn, MacArthur, Kaptein and Thornton
6	refinement	X-PLOR	3.856	Nilges, Kuszewski and Brnger

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.