1CEK

THREE-DIMENSIONAL STRUCTURE OF THE MEMBRANE-EMBEDDED M2 CHANNEL-LINING SEGMENT FROM THE NICOTINIC ACETYLCHOLINE RECEPTOR BY SOLID-STATE NMR SPECTROSCOPY

SOLID-STATE NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	15N SHIFT/1H-15N DIPOLAR COUPLING PISEMA	DMPC			6.0		295
2	15N SHIFT/15N SHIFT HETCOR	DMPC			6.0		295
3	1H SHIFT/15N SHIFT/1H-15N DIPOLAR COUPLING CORRELATION	DMPC			6.0		295

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Home-built	HOMEBUILT	400
2	CHEMAGNETICS	CMX400	550

NMR Refinement
Method	Details	Software
ORIENTATIONAL CONSTRAINTS		FISI

NMR Ensemble Information
Conformer Selection Criteria	LOWEST ENERGY
Conformers Calculated Total Number	24
Conformers Submitted Total Number	1

Additional NMR Experimental Information
Details	LOWEST ENERGY. SAMPLE: DMPC BILAYERS ORIENTED ON GLASS SLIDES 15N CHEMICAL SHIFT, 1H CHEMICAL SHIFT AND 1H-15N DIPOLAR COUPLING FREQUENCIES WERE MEASURED FROM PISEMA AND

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	FISI
2	structure solution	BACKTOR
3	structure solution	RESTRICT
4	refinement	RESTRICT

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.