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Crystal structure of phenylalanine-regulated 3-deoxy-D-arabino-heptulosonate-7-phosphate synthase (DAHP synthase) from E.coli complexed with Mn2+, PEP, and Phe
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1QR7 PDB ENTRY 1QR7
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 8.1 295 PEG 4000, lithium sulfate, manganese sulfate, phosphoenolpyruvate,
phenylalanine, bis-tris-propane, pH 8.1, VAPOR DIFFUSION, HANGING DROP at 295K
Crystal Properties Matthews coefficient Solvent content 2.84 56.75
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 290.097 α = 90 b = 90.097 β = 120.77 c = 155.798 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 200 CCD ADSC QUANTUM 4 mirrors 2000-08-15 M MAD
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON NSLS BEAMLINE X4A 0.97165 NSLS X4A
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 2.8 20 99.3 0.076 24 6.8 84564 84546 38.6
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) 2.8 2.9 98.7 0.313 5.3 6.5
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 MAD THROUGHOUT PDB ENTRY 1QR7 2.8 20 84546 84545 2598 100 0.219 0.219 0.218 0.2151 0.246 0.2437 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] 3.34 -5.4 -11.657 8.317
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 21411 Nucleic Acid Atoms Solvent Atoms Heterogen Atoms 264
Software Software Software Name Purpose MLPHARE phasing DM model building CNS refinement REFMAC refinement DENZO data reduction SCALEPACK data scaling CCP4 data scaling DM phasing CNS phasing