Experiment: 2JX6

Structure and membrane interactions of the antibiotic peptide dermadistinctin k by solution and oriented 15N and 31P solid-state NMR spectroscopy

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H TOCSY	2.0mM dermadistinctin k; trifluoroethanol; H2O 60%, D2O 40%	trifluoroethanol; H2O 60%, D2O 40%		7.0	ambient	293.15
2	2D 1H-1H NOESY	2.0mM dermadistinctin k; trifluoroethanol; H2O 60%, D2O 40%	trifluoroethanol; H2O 60%, D2O 40%		7.0	ambient	293.15
3	2D 1H-13C HSQC	2.0mM dermadistinctin k; trifluoroethanol; H2O 60%, D2O 40%	trifluoroethanol; H2O 60%, D2O 40%		7.0	ambient	293.15
4	2D 1H-15N HSQC	2.0mM dermadistinctin k; trifluoroethanol; H2O 60%, D2O 40%	trifluoroethanol; H2O 60%, D2O 40%		7.0	ambient	293.15

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE DRX	600

NMR Refinement
Method	Details	Software
simulated annealing	NOE intensities were converted into semi-quantitative distances restrains. The upper limits of the distances thus obtained were 2.8, 3.4 and 5.0A; (for strong, medium, and weak NOEs, respectively). Structure calculations were performed using the Xplor-NIH software, version 2.17.0 . Starting with the extended structure, 500 structures were generated using a simulated annealing protocol. This was followed by 20000 steps of simulated annealing at 1000 K and a subsequent decrease in tempera ure in 15000 steps in the first slow-cool annealing stage.	XwinNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	500
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	XwinNMR		Bruker Biospin
2	processing	NMRPipe		Delaglio, Grzesiek, Vuister, Zhu, Pfeifer and Bax
3	data analysis	NMRView	5.0.4	Johnson, One Moon Scientific
4	chemical shift assignment	NMRView	5.0.4	Johnson, One Moon Scientific
5	structure solution	X-PLOR NIH	2.17.0	Schwieters, Kuszewski, Tjandra and Clore
6	geometry optimization	X-PLOR NIH	2.17.0	Schwieters, Kuszewski, Tjandra and Clore
7	data analysis	MOLMOL	2K.2	Koradi, Billeter and Wuthrich
8	data analysis	Procheck	3.5.4	Laskowski, MacArthur, Smith, Jones, Hutchinson, Morris, Moss and Th
9	refinement	X-PLOR NIH	2.17.0	Schwieters, Kuszewski, Tjandra and Clore