6AK3

Crystal structure of the human prostaglandin E receptor EP3 bound to prostaglandin E2

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	LIPIDIC CUBIC PHASE		293	buffer A (0.1 M MES-NaOH (pH 6.0), 35 % PEG300, 400 mM Na2SO4, 1% 1,2,3-heptanetriol, 0.2 mM ONO-AE3-240), buffer B (0.1 M MES-NaOH (pH 5.5-6.0), 30-40 % PEG300, 100 mM NaCl, 100 mM Li2SO4, 1% 1,2,3-heptanetriol, 0.2 mM ONO-AE3-240), buffer C (0.1 M MES-NaOH (pH 6.1) or 0.1 M Tris-HCl (pH 7.5-8.0), 30 % PEG500MME, 200 mM (NH4)2SO4, 1% 1,2,3-heptanetriol, 0.2 mM ONO-AE3-240), buffer D (0.1 M MES-NaOH (pH 5.8-6.1), 30 % PEG300, 100 mM MgSO4, 1% 1,2,3-heptanetriol, 0.2 mM ONO-AE3-240), buffer E (0.1 M MES-NaOH (pH 5.5), 30 % PEG300, 100 mM K2SO4, 1% 1,2,3-heptanetriol, 0.2 mM ONO-AE3-240)

Crystal Properties
Matthews coefficient	Solvent content
2.46	50.07

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 66.09	α = 90
b = 42.28	β = 96.09
c = 161.3	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	100	PIXEL	DECTRIS EIGER X 9M		2018-01-22	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL32XU	1	SPring-8	BL32XU

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.9	50	99.9	1.15	43.4		20206

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.9	3.08

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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		FREE R-VALUE	2.9	48.377	1.34	20175	967	99.83	0.2529	0.2508	0.2952

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	11.924
f_angle_d	0.437
f_chiral_restr	0.035
f_plane_restr	0.003
f_bond_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4109
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	142

Software

Software
Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing

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.