Experiment: 3UON

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

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2RH1	Beta2 adrenergic receptor, T4 lysozyme (PDB ENTRY 2RH1)

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	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	0.2229	0.2764	0.2699	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