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2.0 Angstrom Crystal Structure of Ovine Prostaglandin H2 Synthase-1, in complex with alpha-methyl-4-biphenylacetic acid
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1EQH
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 6.7 291 20 mM sodium phosphate pH 6.7, 100-200mM NACL, 0.6% BOG, 1mM NSAID against reservoir of 4-8% PEG-4000, VAPOR DIFFUSION, HANGING DROP, temperature 291K
Crystal Properties Matthews coefficient Solvent content 4.39 71.95
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 98.147 α = 90 b = 203.859 β = 90 c = 223.599 γ = 90
Symmetry Space Group I 2 2 2
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 180 CCD ADSC QUANTUM 4 2002-09-01 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON NSLS BEAMLINE X25 1.099 NSLS X25
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (Observed) Net I Over Average Sigma (I) Redundancy Number Reflections (All) Number Reflections (Observed) Observed Criterion Sigma (F) Observed Criterion Sigma (I) B (Isotropic) From Wilson Plot 1 2 50 94.9 0.103 7.8 6.63 144508 144508 2 31.3
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) R Merge I (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 2 2.07 71 0.52 2.2 4.3 9630
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Starting model Resolution (High) Resolution (Low) Cut-off Sigma (I) Number Reflections (All) Number Reflections (Observed) Number Reflections (R-Free) Percent Reflections (Observed) R-Factor (All) R-Factor (Observed) R-Work (Depositor) R-Work (DCC) R-Free (Depositor) R-Free (DCC) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT THROUGHOUT 1EQH 2 43.68 2 144508 142879 10694 94.8 0.217 0.217 0.217 0.2035 0.231 0.2183 RANDOM 44.1
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] -3.36 3.02 0.35
RMS Deviations Key Refinement Restraint Deviation c_dihedral_angle_d 21.6 c_angle_deg 2 c_scangle_it 2 c_mcangle_it 1.27 c_scbond_it 1.25 c_improper_angle_d 0.96 c_mcbond_it 0.75 c_bond_d 0.011
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 8984 Nucleic Acid Atoms Solvent Atoms 654 Heterogen Atoms 588
Software Software Software Name Purpose CNS refinement CNS phasing