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CRYSTAL STRUCTURE OF THE APO-THYMIDYLATE SYNTHASE R166Q MUTANT
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model Other Wildtype Binary Complex of E.coli thymidylate synthase
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 8.1 298 Ammonium sulfate, potassium phosphate, EDTA, DTT, pH 8.1, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Crystal Properties Matthews coefficient Solvent content 3.17 61.24
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 132.5 α = 90 b = 132.5 β = 90 c = 132.5 γ = 90
Symmetry Space Group I 21 3
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 298 DIFFRACTOMETER ENRAF-NONIUS FAST 1997-05-04 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 ROTATING ANODE ENRAF-NONIUS FR571
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 2.94 35.335 96.1 0.09 7.4 7 8138 8138
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 2.94 3.02 96 0.38 6.1 610
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Starting model Resolution (High) Resolution (Low) Cut-off Sigma (I) Cut-off Sigma (F) Number Reflections (All) Number Reflections (Observed) Number Reflections (R-Free) Percent Reflections (Observed) R-Factor (All) R-Factor (Observed) R-Work (Depositor) R-Free (Depositor) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION Fourier Difference Maps THROUGHOUT Wildtype Binary Complex of E.coli thymidylate synthase 2.94 33.13 3 0.0001 8390 8138 868 97 0.171 0.171 0.171 0.22 RANDOM 39.5
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 Key Refinement Restraint Deviation c_dihedral_angle_d 24.6 c_angle_deg 1.3 c_improper_angle_d 0.81 c_bond_d 0.007
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 2151 Nucleic Acid Atoms Solvent Atoms 10 Heterogen Atoms
Software Software Software Name Purpose CNS refinement MADNESS data reduction CCP4 data scaling ROTAVATA data scaling CNS phasing