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277K Crystal structure of Escherichia Coli dihydrofolate reductase
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, HANGING DROP 7 277 17% PEG 400, 20 MM IMIDAZOLE PH 7.0, 125 MM MNCL2, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 277K
Crystal Properties Matthews coefficient Solvent content 2.13 42.37
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 34.299 α = 90 b = 45.521 β = 90 c = 98.711 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 277 CCD ADSC QUANTUM 315 2005-04-25 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON SSRL BEAMLINE BL11-1 0.9 SSRL BL11-1
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 1.05 49.36 98.3 0.045 40.8 9.9 71782 71782 -3 -3
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 1.05 1.09 97.2 0.458 5.2 9.1 6984
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Starting model Resolution (High) Resolution (Low) 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 FREE R 1RX2 1.05 49.36 71709 71709 3589 98.3 0.109 0.109 0.108 0.1155 0.134 0.1139 RANDOM
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]
Coordinate Error Structure Solution Method Refinement High Resolution Refinement Low Resolution 82 1191 1570.3
RMS Deviations Key Refinement Restraint Deviation s_from_restr_planes 0.373 s_approx_iso_adps 0.172 s_non_zero_chiral_vol 0.096 s_zero_chiral_vol 0.082 s_similar_adp_cmpnt 0.049 s_angle_d 0.031 s_anti_bump_dis_restr 0.019 s_bond_d 0.012 s_rigid_bond_adp_cmpnt 0.005 s_similar_dist
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 1270 Nucleic Acid Atoms Solvent Atoms 230 Heterogen Atoms 82
Software Software Software Name Purpose ADSC data collection SHELX model building SHELXL-97 refinement HKL-2000 data reduction HKL-2000 data scaling SHELX phasing