1Q2W

X-Ray Crystal Structure of the SARS Coronavirus Main Protease


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1LVOHomology model based on 1LVO

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION6.5294PEG 20K, sodium chloride, BME, methionine, glycerol, pH 6.5, VAPOR DIFFUSION, temperature 294K
Crystal Properties
Matthews coefficientSolvent content
2.550.73

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 52.244α = 90
b = 98.287β = 102.86
c = 67.822γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDMAR CCD 165 mm2003-07-18MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAPS BEAMLINE 31-ID0.9198APS31-ID

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)R Sym I (Observed)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
11.8626.398.20.0750.0757.813.75475754747124.7
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)R-Sym I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
1.861.9691.60.5050.5052.95.67398

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (All)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTHomology model based on 1LVO1.8652518355182526300.2070.2070.1940.249Random31
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
r_scangle_it4.12
r_scbond_it2.822
r_mcangle_it2.401
r_angle_refined_deg1.643
r_mcbond_it1.478
r_bond_refined_d0.018
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4640
Nucleic Acid Atoms
Solvent Atoms464
Heterogen Atoms

Software

Software
Software NamePurpose
MAR345data collection
SCALAdata scaling
EPMRphasing
REFMACrefinement
CCP4data scaling