6XFN

Crystal structure of the SARS-CoV-2 (COVID-19) main protease in complex with UAW243

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.6	298	20% PEG3000, 0.1 M sodium citrate, pH 5.6

Crystal Properties
Matthews coefficient	Solvent content
1.97	37.43

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 114.566	α = 90
b = 54.317	β = 100.86
c = 44.492	γ = 90

Symmetry
Space Group	C 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 PILATUS 6M		2020-05-28	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-ID	0.987	APS	19-ID

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	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	1.7	50	98.9	0.065	0.074	0.036	8.7	4.1		29333

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	1.7	1.73	99.8		0.701	0.803	0.387	0.692		4.2

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	PDB entry 6YB7	1.7	38.2	27843	1490	98.44	0.1972	0.1954	0.2282	RANDOM	31.77

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]
0.98		-0.47	-0.06		-0.69

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.76
r_dihedral_angle_4_deg	17.788
r_dihedral_angle_3_deg	14.704
r_dihedral_angle_1_deg	7.856
r_angle_refined_deg	1.752
r_angle_other_deg	1.403
r_chiral_restr	0.088
r_bond_refined_d	0.011
r_gen_planes_refined	0.009
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.76
r_dihedral_angle_4_deg	17.788
r_dihedral_angle_3_deg	14.704
r_dihedral_angle_1_deg	7.856
r_angle_refined_deg	1.752
r_angle_other_deg	1.403
r_chiral_restr	0.088
r_bond_refined_d	0.011
r_gen_planes_refined	0.009
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2336
Nucleic Acid Atoms
Solvent Atoms	173
Heterogen Atoms	40

Software

Software
Software Name	Purpose
HKL-3000	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-3000	data reduction
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.