7CB7

1.7A resolution structure of SARS-CoV-2 main protease (Mpro) in complex with broad-spectrum coronavirus protease inhibitor GC376

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	7CAM

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	293	0.1 M Bis-Tris propane, 0.02 M sodium/potassium phosphate, 20% (w/v) PEG3350

Crystal Properties
Matthews coefficient	Solvent content
2.28	46

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 55.029	α = 90
b = 98.792	β = 108.412
c = 59.492	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	CCD	RAYONIX MX300HE		2020-05-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSRRC BEAMLINE BL15A1	1.000	NSRRC	BL15A1

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	1.69	27.78	97.61	0.023	24.3	3.7		106790			11.7

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	1.69	1.75			0.128

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	7CAM	1.69	27.78	1.38	106790	3300	80.79	0.1576	0.1566	0.1916	19.5

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	18.31
f_angle_d	1.0423
f_chiral_restr	0.0655
f_bond_d	0.009
f_plane_restr	0.0078

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4707
Nucleic Acid Atoms
Solvent Atoms	565
Heterogen Atoms	59

Software

Software
Software Name	Purpose
PHENIX	refinement
HKL-2000	data scaling
HKL-2000	data reduction
PHASER	phasing

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 R01GM157729.