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Crystal structure of TS-DHFR from Cryptosporidium hominis in complex with NADPH, FdUMP, methotrexate and 2-amino-4-oxo-4,7-dihydro-pyrrolo[2,3-d]pyrimidine-methyl-phenyl-L-glutamic acid.
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 4KY8 pdb entry 4KY8
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 8 298 12% (w/v) PEG 6000, 60 mM ammonium sulfate, 200 mM lithium sulfate, and 100 mM Tris pH 8.0. ChTS-DHFR enzyme (approximately 7 mg/ml) with 1 mM NADPH, 1 mM FdUMP, 1 mM methotrexate and 0.5 mM inhibitor, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Crystal Properties Matthews coefficient Solvent content 4.43 72.21
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 213.611 α = 90 b = 115.031 β = 93.92 c = 217.643 γ = 90
Symmetry Space Group C 1 2 1
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 77 CCD ADSC QUANTUM 315r Monochromator 2014-03-07 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON NSLS BEAMLINE X29A 1.075 NSLS X29A
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) Redundancy Number Reflections (All) Number Reflections (Observed) Observed Criterion Sigma (F) Observed Criterion Sigma (I) B (Isotropic) From Wilson Plot 1 3.45 50 91 0.135 0.135 6.9 3.3 209383 62866 -3 75.61
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 3.45 3.51 85.6 0.465 3
Refinement Statistics Diffraction ID Structure Solution Method Starting model Resolution (High) Resolution (Low) Cut-off Sigma (F) Number Reflections (All) Number Reflections (Observed) Number Reflections (R-Free) Percent Reflections (Observed) R-Factor (Observed) R-Work (Depositor) R-Work (DCC) R-Free (Depositor) R-Free (DCC) Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT pdb entry 4KY8 3.449 48.941 1.34 62823 62823 2021 90.23 0.2181 0.2173 0.2238 0.242 0.2474 80.7
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 f_dihedral_angle_d 12.907 f_angle_d 0.676 f_chiral_restr 0.027 f_plane_restr 0.003 f_bond_d 0.002
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 20685 Nucleic Acid Atoms Solvent Atoms Heterogen Atoms 660
Software Software Software Name Purpose DENZO data reduction SCALEPACK data scaling PHENIX refinement PDB_EXTRACT data extraction CBASS data collection HKL-2000 data reduction HKL-2000 data scaling PHASER phasing