1PLX | pdb_00001plx

NMR structure of Methionine-Enkephalin in fast tumbling Bicelles/DMPG

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D NOESY	5.1uM Menk; (DMPC+DMPG)/DHPC: 0.5:1 (molar ratio); DMPC/DMPG: 9:1 (molar ratio); Lipid/peptide: 25:1 (molar ratio); 10% w/v of lipids in water; 90%H2O, 10%D2O	90% H2O/10% D2O	9mM	4.8	ambient	295
2	g-COSY	5.1uM Menk; (DMPC+DMPG)/DHPC: 0.5:1 (molar ratio); DMPC/DMPG: 9:1 (molar ratio); Lipid/peptide: 25:1 (molar ratio); 10% w/v of lipids in water; 90%H2O, 10%D2O	90% H2O/10% D2O	9mM	4.8	ambient	295

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Varian	INOVA	600

NMR Refinement
Method	Details	Software
simulated annealing	The structures are based on a total of 2 phi angle and 58 NOE-derived distance constraints. 1000 high-temperature steps were used (15 ps) up to a final temperature of 50000 K then 1000 cooling steps (250 K, 15 ps) were applied. Finally, 10 cycles of 200 minimization steps were performed A repel constant value of 0.8 was used	VNMR

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	200
Conformers Submitted Total Number	80
Representative Model	1 (1 and 2, closest to the average of each of the two conformers)

Additional NMR Experimental Information
Details	PFG diffusion experiments were also performed on the sample

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	VNMR	6.1C	Varian Inc.
2	processing	NMRPipe	2.0 Rev 2001.117.12.48	Frank Delaglio
3	data analysis	NMRView	5.0.4	Bruce A. Johnson
4	structure solution	CNS	1.1	Axel T. Brunger
5	refinement	CNS	1.1	Axel T. Brunger