3TIT

Crystal structure of SARS coronavirus main protease complexed with an alpha, beta-unsaturated ethyl ester SG81


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1EVAPORATION62986%-8% PEG 6000, 0.1M MES, 3% 2-methyl-2,4-pentanediol (MPD), 3% DMSO, pH 6.0, EVAPORATION, temperature 298K
Crystal Properties
Matthews coefficientSolvent content
3.4364.13

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 108.01α = 90
b = 83.14β = 104.63
c = 53.48γ = 90
Symmetry
Space GroupC 1 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray200CCDRAYONIX MX-2252010-08-06MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONBESSY BEAMLINE 14.20.9184BESSY14.2

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (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
11.9937.7194.93126029677-3
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.992.03894.9

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)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 REPLACEMENTTHROUGHOUT1.9937.713126029677158399.050.194370.194370.192260.23493RANDOM27.867
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]
0.01-0.01
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg36.699
r_dihedral_angle_4_deg15.092
r_dihedral_angle_3_deg13.577
r_dihedral_angle_1_deg6.71
r_scangle_it3.725
r_scbond_it2.434
r_mcangle_it1.51
r_angle_refined_deg1.476
r_mcbond_it0.788
r_chiral_restr0.1
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg36.699
r_dihedral_angle_4_deg15.092
r_dihedral_angle_3_deg13.577
r_dihedral_angle_1_deg6.71
r_scangle_it3.725
r_scbond_it2.434
r_mcangle_it1.51
r_angle_refined_deg1.476
r_mcbond_it0.788
r_chiral_restr0.1
r_bond_refined_d0.015
r_gen_planes_refined0.007
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms2371
Nucleic Acid Atoms
Solvent Atoms266
Heterogen Atoms34

Software

Software
Software NamePurpose
MAR345data collection
MOLREPphasing
REFMACrefinement
iMOSFLMdata reduction
SCALAdata scaling