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Crystal structure of the main protease (3CLpro/Mpro) of SARS-CoV-2 obtained in presence of 150 micromolar MG-132.
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 7BB2 7BB2
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, SITTING DROP 293 0.12M 1,6-Hexanediol 0.12M 1-Butanol
0.12M 1,2-Propanediol 0.12M 2-Propanol
0.12M 1,4-Butanediol 0.12M 1,3-Propanediol, 0.1 M imidazole/MES pH 6.5, 20% v/v PEG 500 MME 10 % w/v PEG 20000
Crystal Properties Matthews coefficient Solvent content 2.59 52.44
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 67.742 α = 90 b = 99.719 β = 90 c = 103.601 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 6M 2021-05-12 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON ELETTRA BEAMLINE 11.2C 0.9999 ELETTRA 11.2C
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (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 1.6 71.85 100 0.088 0.999 13.8 8.8 93197 20.49
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 1.6 1.63 0.618
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 (Depositor) R-Work (DCC) R-Free (Depositor) R-Free (DCC) Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT FREE R-VALUE 7BB2 1.6 44.93 1.33 93106 4580 99.96 0.1672 0.1662 0.1659 0.186 0.1854 29.75
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 13.4952 f_angle_d 0.9737 f_chiral_restr 0.0583 f_bond_d 0.0102 f_plane_restr 0.0081
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 4726 Nucleic Acid Atoms Solvent Atoms 626 Heterogen Atoms 45
Software Software Software Name Purpose PHENIX refinement PHENIX refinement XDS data reduction Aimless data scaling PHASER phasing