7TOB

Crystal structure of the SARS-CoV-2 Omicron main protease (Mpro) in complex with inhibitor GC376

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		293	20% PEG 3350, 0.2 M KNO3

Crystal Properties
Matthews coefficient	Solvent content
1.96	37.37

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 45.186	α = 90
b = 52.987	β = 100.5
c = 113.006	γ = 90

Symmetry
Space Group	I 1 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	PIXEL	DECTRIS EIGER R 4M		2022-01-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007 HF	1.54056

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	2.05	26.21	99.2	0.077	0.092	0.05	0.992	9.4	3.3		16446

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	2.05	2.11	98.4		0.499	0.613	0.352	0.692		2.9

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	7lyh	2.05	26.21	15614	829	98.89	0.1737	0.1716	0.2135	RANDOM	30.736

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]
-1.28		-0.3	-0.31		1.6

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.171
r_dihedral_angle_4_deg	22.893
r_dihedral_angle_3_deg	13.594
r_dihedral_angle_1_deg	7.603
r_angle_other_deg	1.678
r_angle_refined_deg	1.543
r_chiral_restr	0.071
r_bond_refined_d	0.01
r_gen_planes_refined	0.008
r_bond_other_d	0.004

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.171
r_dihedral_angle_4_deg	22.893
r_dihedral_angle_3_deg	13.594
r_dihedral_angle_1_deg	7.603
r_angle_other_deg	1.678
r_angle_refined_deg	1.543
r_chiral_restr	0.071
r_bond_refined_d	0.01
r_gen_planes_refined	0.008
r_bond_other_d	0.004
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2363
Nucleic Acid Atoms
Solvent Atoms	198
Heterogen Atoms	43

Software

Software
Software Name	Purpose
REFMAC	refinement
Aimless	data scaling
PDB_EXTRACT	data extraction
MOLREP	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.