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Neutron crystal Structure of E.coli Dihydrofolate Reductase complexed with folate and NADP+
X-RAY DIFFRACTION - NEUTRON DIFFRACTION
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1RX2
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, SITTING DROP 7 291 40mg/mL DHFR-folate-NADP+ complex, 12% (v/v) PEG400, 100 mM MnCl2, 20 mM imidazole, pH7.0
Crystal Properties Matthews coefficient Solvent content 2.15 42.75
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 34.293 α = 90 b = 45.625 β = 90 c = 98.974 γ = 90
Symmetry Space Group P 21 21 21
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 291 IMAGE PLATE RIGAKU mirrors 2013-09-10 M SINGLE WAVELENGTH 2 1 neutron 291 CUSTOM-MADE mirrors 2013-08-10 L LAUE
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 ROTATING ANODE RIGAKU 1.54 2 NUCLEAR REACTOR OTHER 3.3-4.5
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (Observed) R Sym I (Observed) Rrim I (All) Rpim I (All) CC (Half) R Split (All) 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 1.599 30 79.3 0.188 5.3 7.5 20751 3.2 2 1.994 32.4 70 1.2 1.2 8745
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) R Merge I (Observed) R-Sym I (Observed) Rrim I (All) Rpim I (All) CC (Half) R Split (All) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 1.599 1.7 0.31 3.2 5.8 2 1.994 2.1
Refinement Statistics Diffraction ID Structure Solution Method 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-Work (DCC) R-Free (Depositor) R-Free (DCC) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT 1.599 27.413 20751 1068 97.58 0.1948 0.1937 0.1946 0.218 0.2182 NEUTRON DIFFRACTION MOLECULAR REPLACEMENT 1.994 32.403 8743 427 78.42 0.2322 0.2303 0.2707
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 19.963 f_angle_d 0.915 f_bond_d 0.092 f_chiral_restr 0.039 f_plane_restr 0.028
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 1268 Nucleic Acid Atoms Solvent Atoms 119 Heterogen Atoms 82
Software Software Software Name Purpose PHENIX refinement HKL-3000 data processing Coot model building PDB_EXTRACT data extraction Coot model building SCALA data reduction PHASER phasing SCALA data scaling LAUEGEN data reduction