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STRUCTURE OF DIHYDROFOLATE REDUCTASE
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1VIE PDB ENTRY 1VIE
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 8 CRYSTALS WERE GROWN FROM HANGING- DROPS CONTAINING PROTEIN AT A FINAL CONCENTRATION OF ABOUT 18 MG/ML, 30 MM FOLATE, 40 MM BICINE BUFFER AT PH 8.0 AND 18% 2-METHYL-2,4-PENTANE DIOL (MPD). DROPS WERE EQUILIBRATED AGAINST A RESERVOIR CONTAINING 100 MM KH2PO4 BUFFER AT PH 6.8 AND 50% MPD. THE CRYSTALS WERE FURTHER SOAKED IN 100 MM FOLATE FOR 3 DAYS., vapor diffusion - hanging drop
Crystal Properties Matthews coefficient Solvent content 2 40
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 68.75 α = 90 b = 68.75 β = 90 c = 52.59 γ = 90
Symmetry Space Group I 41 2 2
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 277 AREA DETECTOR XUONG-HAMLIN MULTIWIRE 1992-03-15 M
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 ROTATING ANODE RIGAKU RUH2R
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (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 1.8 10 100 0.055 12 12 6094 2 10.7
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) R-Sym I (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1.8 1.86 100 0.16 2.2 8
Refinement Statistics Diffraction ID Structure Solution Method Starting model Resolution (High) Resolution (Low) Cut-off Sigma (F) Number Reflections (Observed) Number Reflections (R-Free) Percent Reflections (Observed) R-Factor (Observed) R-Work (Depositor) R-Free (Depositor) Mean Isotropic B X-RAY DIFFRACTION ISOMORPHOUS REPLACEMENT PDB ENTRY 1VIE 1.8 10 1 6040 100 0.176 0.176
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 x_dihedral_angle_d 18.5 x_angle_deg 2.5 x_bond_d 0.014 x_bond_d_na x_bond_d_prot x_angle_d x_angle_d_na x_angle_d_prot x_angle_deg_na x_angle_deg_prot
RMS Deviations Key Refinement Restraint Deviation x_dihedral_angle_d 18.5 x_angle_deg 2.5 x_bond_d 0.014 x_bond_d_na x_bond_d_prot x_angle_d x_angle_d_na x_angle_d_prot x_angle_deg_na x_angle_deg_prot x_dihedral_angle_d_na x_dihedral_angle_d_prot x_improper_angle_d x_improper_angle_d_na x_improper_angle_d_prot x_mcbond_it x_mcangle_it x_scbond_it x_scangle_it
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 457 Nucleic Acid Atoms Solvent Atoms 44 Heterogen Atoms 26
Software Software Software Name Purpose X-PLOR model building X-PLOR refinement UCSD data reduction UCSD data scaling X-PLOR phasing