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Neutron crystal Structure of E.coli Dihydrofolate Reductase complexed with folate and NADP+ at pH4.5
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 4.5 291 40mg/mL DHFR-folate-NADP+ complex, 12% (v/v) PEG 400, 100mM MnCl2, 100mM NaAc, pH4.5
Crystal Properties Matthews coefficient Solvent content 2.14 42.47
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 34.102 α = 90 b = 45.595 β = 90 c = 99.113 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 RAXIS IV++ 2014-08-10 M SINGLE WAVELENGTH 2 1 neutron 291 IMAGE PLATE CUSTOM-MADE 2015-05-15 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 ROTATING ANODE RIGAKU MICROMAX-007 1.54 2 NUCLEAR REACTOR OTHER 3.3
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 1.65 40 93.9 0.041 24.94 3.9 18163 1 2.1 27.31 91.76 0.041 25.3 2.3 17681
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 1.65 1.75 0.426 2.52 3.3 2 2.1 2.18 0.335 2.3
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 1.65 27.31 1.38 17681 904 91.76 0.1585 0.1571 0.1571 0.1862 0.1854 26.3668 NEUTRON DIFFRACTION MOLECULAR REPLACEMENT 2.1 26.33 7018 316 72.5 0.1786 0.1766 0.2187
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]
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 1268 Nucleic Acid Atoms Solvent Atoms 346 Heterogen Atoms 129
Software Software Software Name Purpose HKL-2000 data reduction HKL-2000 data scaling PHENIX refinement PDB_EXTRACT data extraction PHASER phasing