8AIZ

Mpro of SARS-CoV-2 in complex with the RK-68 inhibitor

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	293	0.002 M zinc chloride, 0.1 M Tris 8.0, 20 % w/v PEG 6000

Crystal Properties
Matthews coefficient	Solvent content
1.96	37.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 113.8	α = 90
b = 52.8	β = 103.08
c = 45.35	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 EIGER X 16M		2021-11-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PETRA III, DESY BEAMLINE P11	1.0332	PETRA III, DESY	P11

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	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	1.99	47.67	98.9	0.998	13.1	6.8		17855

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.99	2.06			0.916

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 (All)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	6y2e	1.992	47.668	17855	893	98.75	0.181	0.1784	0.2239	36.591

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]
-0.094		0.042	0.033		0.038

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.951
r_dihedral_angle_4_deg	16.182
r_dihedral_angle_3_deg	16.147
r_dihedral_angle_1_deg	7.605
r_lrange_other	6.761
r_lrange_it	6.758
r_scangle_it	5.37
r_scangle_other	5.368
r_mcangle_other	3.626
r_mcangle_it	3.624
r_scbond_it	3.57
r_scbond_other	3.568
r_dihedral_angle_other_3_deg	3.565
r_mcbond_it	2.608
r_mcbond_other	2.605
r_angle_refined_deg	1.508
r_angle_other_deg	1.335
r_nbd_refined	0.204
r_symmetry_nbd_other	0.181
r_nbtor_refined	0.173
r_symmetry_xyhbond_nbd_refined	0.172
r_nbd_other	0.169
r_xyhbond_nbd_refined	0.142
r_symmetry_nbd_refined	0.138
r_symmetry_nbtor_other	0.076
r_chiral_restr	0.07
r_bond_refined_d	0.008
r_gen_planes_refined	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2367
Nucleic Acid Atoms
Solvent Atoms	68
Heterogen Atoms	40

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
Aimless	data scaling
MOLREP	phasing