3K1O

Crystal structure of sterol 14-alpha demethylase (CYP51) from Trypanosoma cruzi in complex with a potential antichagasic drug, posaconazole


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 3G1QPDB entry 3G1Q

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP7.2298PEG 3350, POTASSIUM FORMATE, SODIUM CHLORIDE, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Crystal Properties
Matthews coefficientSolvent content
2.5251.17

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 63.121α = 90
b = 63.121β = 90
c = 229.302γ = 120
Symmetry
Space GroupP 31 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDMARMOSAIC 225 mm CCDBe Lenses/Diamond Laue Mono2009-07-17MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAPS BEAMLINE 21-ID-F0.97872APS21-ID-F

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge 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
12.893099.530.067268.511966119104.14.171.7
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
12.892.941000.5884.18.8

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (I)Cut-off Sigma (F)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPDB entry 3G1Q2.8929.174.14.11191060699.520.230330.228070.27597RANDOM45.997
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]
-0.27-0.14-0.270.41
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg29.718
r_dihedral_angle_4_deg15.401
r_dihedral_angle_3_deg14.266
r_scangle_it4.078
r_dihedral_angle_1_deg3.83
r_scbond_it2.441
r_angle_refined_deg1.697
r_mcangle_it1.481
r_mcbond_it0.77
r_chiral_restr0.054
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg29.718
r_dihedral_angle_4_deg15.401
r_dihedral_angle_3_deg14.266
r_scangle_it4.078
r_dihedral_angle_1_deg3.83
r_scbond_it2.441
r_angle_refined_deg1.697
r_mcangle_it1.481
r_mcbond_it0.77
r_chiral_restr0.054
r_bond_refined_d0.014
r_gen_planes_refined0.004
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms3491
Nucleic Acid Atoms
Solvent Atoms10
Heterogen Atoms94

Software

Software
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling