1MIC

GRAMICIDIN A: LEFT-HANDED PARALLEL DOUBLE HELICAL FORM IN METHANOL IN THE PRESENCE OF CACL2, NMR, 20 STRUCTURES

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	TOCSY	20 mM Gramicidin D, 1 mM CaCl2	methanol			ambient	303
2	NOESY	20 mM Gramicidin D, 1 mM CaCl2	methanol			ambient	303
3	DQF-COSY	20 mM Gramicidin D, 1 mM CaCl2	methanol			ambient	303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AMX	600
2	JEOL	GX	500

NMR Refinement
Method	Details	Software
DGSA-distance geometry simulated annealing		X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	187
Conformers Submitted Total Number	20
Representative Model	1 (n/a)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR	3.1	BRUNGER
2	structure calculation	X-PLOR	3.1	BRUNGER

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.