4YIQ

Structure of the CEACAM6-CEACAM8 heterodimer

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.2	293	Ratio of protein:reservoir = 1:0.2 Reservoir solution; 20% PEG 8000, 0.2 M sodium chloride, 0.1 M Sodium Phosphate/Citric Acid, pH 4.2

Crystal Properties
Matthews coefficient	Solvent content
3.1	60.32

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 62.465	α = 90
b = 97.192	β = 90
c = 97.691	γ = 90

Symmetry
Space Group	P 21 21 21

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 PILATUS 6M		2015-02-28	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL12-2	0.979500	SSRL	BL12-2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	1.85	68.9	99.7	0.091	11.3	6.7		51361

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	1.85	1.89	99.1		1.341	1.2	5.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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	4Y88 4Y8A	1.85	68.9	48753	2549	99.6	0.1871	0.1857	0.2131	RANDOM	33.952

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]
0.86			-1.01		0.15

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.969
r_dihedral_angle_4_deg	14.642
r_dihedral_angle_3_deg	10.894
r_dihedral_angle_1_deg	6.093
r_mcangle_it	2.083
r_mcbond_it	1.507
r_mcbond_other	1.507
r_angle_refined_deg	1.23
r_angle_other_deg	0.95
r_chiral_restr	0.074
r_bond_refined_d	0.008
r_gen_planes_refined	0.006
r_bond_other_d	0.004
r_gen_planes_other	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3371
Nucleic Acid Atoms
Solvent Atoms	205
Heterogen Atoms	7

Software

Software
Software Name	Purpose
Aimless	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data reduction