8P87

Crystal structure of the main protease (3CLpro/Mpro) of SARS-CoV-2 obtained in presence of 5 mM X77, from an "old" crystal.


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 7BB2 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP2930.1 M Sodium formate, 0.1M Ammonium acetate, 0.1M Sodium citrate tribasic dihydrate, 0.1M Potassium sodium tartrate tetrahydrate, 0.1M Sodium oxamate, 0.1 M Hepes/MOPS pH 7.5, 20% v/v Ethylene glycol, 10 % w/v PEG 8000
Crystal Properties
Matthews coefficientSolvent content
2.6453.48

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 67.848α = 90
b = 101.138β = 90
c = 104.258γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100PIXELDECTRIS PILATUS 6M2021-05-12MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONELETTRA BEAMLINE 11.2C0.9999ELETTRA11.2C

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)CC (Half)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
11.7101.141000.0830.99914.89.17958224.86
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)CC (Half)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.71.730.66

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTFREE R-VALUE1.750.571.3479486402199.950.17120.17010.191435.99
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
KeyRefinement Restraint Deviation
f_dihedral_angle_d13.5901
f_angle_d0.9314
f_chiral_restr0.061
f_bond_d0.0091
f_plane_restr0.008
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4726
Nucleic Acid Atoms
Solvent Atoms542
Heterogen Atoms53

Software

Software
Software NamePurpose
PHENIXrefinement
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing