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Room Temperature X-Ray Structure of SARS-CoV-2 Main Protease in Complex with noncovalent inhibitor KK-7
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 7RLS
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, SITTING DROP 287 18-21% PEG3350, and either 0.1 M Bis-Tris pH 6.5,7.0, or 0.1 M HEPES pH 7.0, 7.5
Crystal Properties Matthews coefficient Solvent content 2.88 57.36
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 52.259 α = 90 b = 82.121 β = 95.65 c = 91.386 γ = 90
Symmetry Space Group I 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 293 PIXEL DECTRIS EIGER X 4M 2025-10-10 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 ROTATING ANODE RIGAKU MICROMAX-007 HF 1.5406
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (Observed) Rpim I (All) 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 1.8 28.44 99.8 0.086 0.05 0.976 17.35 3.9 35514
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) R Merge I (Observed) Rpim I (All) CC (Half) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 1.8 1.87 98.9 0.521 0.315 0.703 1.69 3.6
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method 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) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT FREE R-VALUE 1.8 18.2 1.35 35390 1792 99.54 0.1644 0.1626 0.1654 0.1976 0.1962 random
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 7.52 f_angle_d 1.452 f_chiral_restr 0.094 f_bond_d 0.017 f_plane_restr 0.012
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 2367 Nucleic Acid Atoms Solvent Atoms 131 Heterogen Atoms 27
Software Software Software Name Purpose PHENIX refinement CrysalisPro data collection CrysalisPro data reduction Aimless data scaling PHASER phasing