Experiment: 9RCS

Cardioderma bat coronavirus KY43 receptor binding domain in complex with human CEACAM6

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
in silico model	AlphaFold
in silico model	AlphaFold

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4.3	293	Protein complex was 1:1.2 molar ratio CEACAM6:KY43-RBD, 2 mg/mL, in 10 mM Tris pH 7.5, 150 mM NaCl). 200 nL protein was incubated with 200 nL reservoir against an 80 uL reservoir containing 0.1 M Na acetate pH 4.3, 21.5% PEG 5K MME, 5% glycerol.

Crystal Properties
Matthews coefficient	Solvent content
4.55	72.96

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 70.01	α = 90
b = 78.795	β = 88.639
c = 82.339	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 EIGER2 X CdTe 9M		2025-02-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I24	0.620	Diamond	I24

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	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	3.012	82.332	48.5	0.196	0.214	0.085	0.994	5.4	6.3		8711			61.95

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.012	3.388	8.3		1.259	1.37	0.537	0.583	1.6

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	3.012	82.32	1.33	8688	392	48.61	0.2584	0.2557	0.256	0.3168	0.3163	73.77

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	14.3022
f_angle_d	1.0708
f_chiral_restr	0.0642
f_plane_restr	0.006
f_bond_d	0.0051

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3203
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	140

Software

Software
Software Name	Purpose
PHENIX	refinement
DIALS	data reduction
STARANISO	data scaling
PHASER	phasing