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Trypanosoma brucei dihydrofolate reductase pyrimethamine complex
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details other Leishmania major DHFR
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 MICROBATCH 6.5 297 0.05M ammonium sulphate, 0.05M Bis-Tris, 32% (w/v) PEG 4000, pH 6.5, microbatch, temperature 297K
Crystal Properties Matthews coefficient Solvent content 2.4 48.83
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 58.239 α = 90 b = 58.239 β = 90 c = 149.142 γ = 90
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 100 CCD Nonius Kappa CCD 2007-10-23 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 ROTATING ANODE ENRAF-NONIUS FR591 1.5418
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 2.2 50 100 0.073 16.6 25182 20.6
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 2.28 99.8 0.386 2513
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Starting model Resolution (High) Resolution (Low) Number Reflections (Observed) Number Reflections (R-Free) Percent Reflections (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 Leishmania major DHFR 2.2 45.9 25132 1278 99.9 0.187 0.1906 0.235 0.1898 RANDOM 29.244
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] 0.08 0.08 -0.15
RMS Deviations Key Refinement Restraint Deviation c_dihedral_angle_d 23.6 c_scangle_it 3.12 c_mcangle_it 2.41 c_scbond_it 2.12 c_angle_deg 1.7 c_mcbond_it 1.47 c_improper_angle_d 0.97 c_bond_d 0.006
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 3323 Nucleic Acid Atoms Solvent Atoms 343 Heterogen Atoms 130
Software Software Software Name Purpose SCALEPACK data scaling AMoRE phasing CNS refinement PDB_EXTRACT data extraction HKL-2000 data collection DENZO data reduction