4DAJ

Structure of the M3 Muscarinic Acetylcholine Receptor

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3UON	M2 muscarinic acetylcholine receptor (3UON)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.5	293	27-38% PEG 300, 100 mM HEPES pH 7.5, 1% (w/w) 1,2,3-heptanetriol, and 100 mM ammonium phosphate. Protein was reconstituted in cubic phase using a 10:1 monolein:cholesterol mix by weight, Lipidic cubic phase, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.68	54.17

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 54.77	α = 85.87
b = 61.31	β = 89.9
c = 176.91	γ = 84.9

Symmetry
Space Group	P 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	78	CCD	MARMOSAIC 300 mm CCD	mirrors	2011-08-14	M	SINGLE WAVELENGTH
2	1	x-ray	78	CCD	MARMOSAIC 300 mm CCD	mirrors	2011-08-23

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 23-ID-D	1.033	APS	23-ID-D
2	SYNCHROTRON	APS BEAMLINE 23-ID-D	1.033	APS	23-ID-D

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	3.4	40	90.6	0.226	4.5	3.7		28385		-3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.4	3.5	85.9		0.527	1.7	2.8

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	M2 muscarinic acetylcholine receptor (3UON)	3.4	39.9	1.98	26013	1276	82.9	0.254	0.251	0.303

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]
-2.1698	2.0178	0.1059	6.5992	-1.3222	-4.4294

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	14.722
f_angle_d	0.862
f_chiral_restr	0.058
f_bond_d	0.011
f_plane_restr	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	13435
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	154

Software

Software
Software Name	Purpose
Blu-Ice	data collection
PHASER	phasing
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling

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 R01GM157729.