3UON

Structure of the human M2 muscarinic acetylcholine receptor bound to an antagonist

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.5	293	25 to 35% PEG 300, 100 mM ammonium phosphate, 2% 2-Methyl-2,4-pentanediol, 100 mM HEPES, 10:1 monoolein:cholesterol lipid mix diluted 1.5:1 with protein in detergent buffer, Lipidic cubic phase, temperature 293K, pH 7.5

Crystal Properties
Matthews coefficient	Solvent content
2.91	57.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 78.17	α = 90
b = 47.26	β = 109.7
c = 88.12	γ = 90

Symmetry
Space Group	P 1 21 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	2011-02-10	M	SINGLE WAVELENGTH
2	1	x-ray	78	CCD	MARMOSAIC 300 mm CCD	mirrors	2011-03-05	M	SINGLE WAVELENGTH

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-B	1.033	APS	23-ID-B

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
1,2	3	27.5	94.1	0.185	6.1	3.5		11726		-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)
1,2	3	3.05	79.2		0.454	1.4	2.4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation 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	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	Beta2 adrenergic receptor, T4 lysozyme (PDB ENTRY 2RH1)	3	27.466	1.35	11702	593	94.15	0.2274	0.2248	0.2764	Random.

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]
18.2278		9.8464	2.5771		-20.8049

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	12.894
f_angle_d	0.573
f_chiral_restr	0.041
f_bond_d	0.002
f_plane_restr	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3451
Nucleic Acid Atoms
Solvent Atoms	57
Heterogen Atoms	39

Software

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

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.