8E1Y

Crystal Structure of SARS-CoV-2 Main protease A193S mutant in complex with Nirmatrelvir

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION		293	0.1 M MES pH 6.7, 5% DMSO, 8% PEG 4000 Cryo protected with 40% PEG 400

Crystal Properties
Matthews coefficient	Solvent content
2.63	53.32

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 100.905	α = 90
b = 103.925	β = 90
c = 68.025	γ = 90

Symmetry
Space Group	P 21 21 21

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 2M		2022-04-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	LNLS SIRUS BEAMLINE MANACA	0.977180	LNLS SIRUS	MANACA

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	2.48	72.5	59.5	0.965	3.9	6.4		15497

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	2.48	2.57			0.575

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	7mbg	2.48	72.5	15481	765	59.506	0.219	0.2166	0.2723	31.165

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]
0.386			-0.336		-0.05

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.677
r_dihedral_angle_4_deg	19.976
r_dihedral_angle_3_deg	17.156
r_dihedral_angle_1_deg	7.569
r_lrange_it	5.647
r_lrange_other	5.647
r_mcangle_it	3.175
r_mcangle_other	3.174
r_scangle_it	2.896
r_scangle_other	2.896
r_mcbond_it	1.781
r_mcbond_other	1.781
r_scbond_it	1.638
r_scbond_other	1.637
r_angle_refined_deg	1.487
r_angle_other_deg	1.301
r_nbd_other	0.538
r_symmetry_nbd_refined	0.504
r_symmetry_xyhbond_nbd_other	0.414
r_symmetry_nbd_other	0.208
r_nbd_refined	0.2
r_xyhbond_nbd_refined	0.197
r_nbtor_refined	0.166
r_symmetry_xyhbond_nbd_refined	0.147
r_symmetry_nbtor_other	0.08
r_chiral_restr	0.057
r_bond_refined_d	0.009
r_gen_planes_refined	0.006
r_bond_other_d	0.003
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4669
Nucleic Acid Atoms
Solvent Atoms	31
Heterogen Atoms	78

Software

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