7PXZ

Reduced form of SARS-CoV-2 Main Protease determined by XFEL radiation


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 6YNQ 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1BATCH MODE7.5291Vapor diffusion was set up with 2 uL MPro (35 mg/mL) and 2 uL 25% PEG1500, 0.1 M MIB pH 7.5, 5% DMSO. Seedstock was prepared by 100 uL 25% PEG1500, 0.1 M MIB pH 7.5, 5% DMSO and 4 uL seeds from plate, vortex 5 times for 5 seconds, add 12.5 uL of MPro (35 mg/mL) and incubate at 18 deg overnight. Final sample was prepared in batch mode by adding 900 uL 25% PEG1500, 0.1 M MIB pH 7.5, 5% DMSO and 100 uL seedstock and 100 uL MPro (35 mg per mL). Add seedbeads (250 uL volume in 1.5 mL Eppi) and incubate overnight at 900 rpm and 18 deg.
Crystal Properties
Matthews coefficientSolvent content
1.9938.1

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 115α = 90
b = 54β = 102
c = 45γ = 90
Symmetry
Space GroupC 1 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray293PIXELAGIPD2021-04-16MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1FREE ELECTRON LASEREUROPEAN XFEL BEAMLINE SPB/SFX1.3European XFELSPB/SFX

Serial Crystallography

Sample delivery method
Diffraction IDDescriptionSample Delivery Method
1GDVNinjection
Injection
Diffraction IDDescriptionFlow RateInjector DiameterInjection PowerInjector NozzleFilter SizeCarrier Solvent
1GDVN

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)CC (Half)R Split (All)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
11.7531.811000.99619330.070711.4430529462799528.4
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)CC (Half)R Split (All)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.751.7999.560.2071.1950.72

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTFREE R-VALUE6YNQ1.7531.6226365149696.350.16620.16350.212
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]
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms2364
Nucleic Acid Atoms
Solvent Atoms233
Heterogen Atoms1

Software

Software
Software NamePurpose
PHENIXrefinement
CrystFELdata reduction
CrystFELdata scaling
PHASERphasing