4OTJ

The complex of murine cyclooxygenase-2 with a conjugate of indomefathin and podophyllotoxin, N-{(succinylpodophyllotoxinyl)but-4-yl}-2-{1-(4-chlorobenzoyl)-5-methoxy-2-methyl-1H-indol-3-yl}acetamide


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 3NT1PDB ENTRY 3NT1

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP8291mCOX-2 protein reconstituted with a 2-fold molar excess of heme in phosphtate buffer, pH 6.7, 100 mM NaCl, 1.2% (w/v) -OG, and 0.1% NaN3, and 10-fold molar excess of inhibitors from 25 mM DMSO stocks were added to protein samples. Mixing 3 uL of the protein-inhibitor complex with 3 uL crystallization solution containing 50 mM EPPS, pH 8.0, 120 mM MgCl2, 22-26% PEG MME-550 against reservoir solutions comprised of 50 mM EPPS pH 8.0, 120 mM MgCl2, 22-26% PEG MME-550, VAPOR DIFFUSION, HANGING DROP, temperature 291K
Crystal Properties
Matthews coefficientSolvent content
2.7555.21

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 180.712α = 90
b = 133.943β = 90
c = 122.223γ = 90
Symmetry
Space GroupP 21 21 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100PIXELPSI PILATUS 6M2013-01-31MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAPS BEAMLINE 24-ID-CAPS24-ID-C

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
12.1150.1199.70.0780.03517.56.817000029.46
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)
12.112.2299.50.5610.2483.56.9

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTPDB ENTRY 3NT12.1150.111.35170113169740513199.50.1770.1770.199
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_d13.644
f_angle_d1.363
f_chiral_restr0.078
f_plane_restr0.008
f_bond_d0.007
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms17878
Nucleic Acid Atoms
Solvent Atoms1531
Heterogen Atoms700

Software

Software
Software NamePurpose
HKL-2000data collection
PHASESphasing
PHENIXrefinement
XDSdata reduction
SCALEPACKdata scaling