1L6Z

CRYSTAL STRUCTURE OF MURINE CEACAM1A[1,4]: A CORONAVIRUS RECEPTOR AND CELL ADHESION MOLECULE IN THE CEA FAMILY

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1HNF	PDB ENTRIES 1HNF AND 1E4J
experimental model	PDB	1E4J	PDB ENTRIES 1HNF AND 1E4J

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.4	298	10% PEG 8000, 0.2 M magnesium acetate, 0.1 M cacodylate, pH 6.4, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
4.78	74.26

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 111.26	α = 90
b = 111.26	β = 90
c = 65.64	γ = 120

Symmetry
Space Group	P 31 2 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	CCD	ADSC QUANTUM 4		2001-02-06	M	MAD
2	1	x-ray	100	CCD	ADSC QUANTUM 4		2001-02-06	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-ID	1.0715,1.0718,1.0534	APS	19-ID
2	SYNCHROTRON	APS BEAMLINE 19-ID	1.100	APS	19-ID

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	3.32	30	99.7	0.073	17.3		7127	6979		-3	68.14

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	3.32	3.42	100		0.37	3.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD and Molecular Replacement	THROUGHOUT	PDB ENTRIES 1HNF AND 1E4J	3.32	15	6898	6898	754		0.297	0.297	0.295	0.329	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]

RMS Deviations
Key	Refinement Restraint Deviation
x_angle_deg	2.325
x_bond_d	0.011

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1609
Nucleic Acid Atoms
Solvent Atoms	26
Heterogen Atoms	81

Software

Software
Software Name	Purpose
HKL-2000	data collection
HKL-2000	data reduction
MLPHARE	phasing
AMoRE	phasing
X-PLOR	refinement
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 R01GM133198.