Experiment: 7M7W

Antibodies to the SARS-CoV-2 receptor-binding domain that maximize breadth and resistance to viral escape

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	7JX3	PDB entry 7JX3, homology models of S2X259 Fab and S2H97 Fab

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		293.15	30% Precipitant Mix 2 (Molecular Dimensions; ethylene glycol, PEG8000), 0.1 M Buffer System 3, pH 8.5 (Molecular Dimensions; Tris (base)/BICINE), 0.12 M Monosaccharides Mix (Molecular Dimensions), 0.02 M sodium chloride, 0.01 M MES, pH 6, 3% v/v Jeffamine ED-2003

Crystal Properties
Matthews coefficient	Solvent content
2.95	58.36

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 86.185	α = 90
b = 66.402	β = 94.34
c = 237.659	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 PILATUS 6M		2021-03-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.97946	SSRL	BL9-2

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	2.65	63.94	98.6	0.149	0.161	0.06	0.997	10.9	6.9		77307

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	2.65	2.7	98.3		2.494	2.696	1.013	0.36		6.8

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entry 7JX3, homology models of S2X259 Fab and S2H97 Fab	2.65	50.01	73189	3771	97.95	0.2236	0.2212	0.2204	0.271	0.2698	RANDOM	75.747

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]
1.49		1.2	-1.74		0.06

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.664
r_dihedral_angle_3_deg	15.912
r_dihedral_angle_4_deg	14.671
r_dihedral_angle_1_deg	6.69
r_angle_refined_deg	0.817
r_chiral_restr	0.065
r_gen_planes_refined	0.003
r_bond_refined_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	16162
Nucleic Acid Atoms
Solvent Atoms	95
Heterogen Atoms	28

Software

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