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Crystal structure of O-Acetyl Serine Sulfhydrylase from Entamoeba histolytica in complex with Serine acetyl transferase derived tetrapeptide, SPSI
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 2PQM
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 7.2 289 2.1M AmSO4, 150mM NaCl, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 289K
Crystal Properties Matthews coefficient Solvent content 2.44 49.68
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 80.515 α = 90 b = 80.515 β = 90 c = 112.636 γ = 90
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 100 IMAGE PLATE MAR scanner 345 mm plate 2008-05-30 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 ROTATING ANODE BRUKER AXS MICROSTAR 1.54
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (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 1.87 27.47 94.6 58947 58645 5.3 3.6
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 1.868 1.917 90.77
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Starting model Resolution (High) Resolution (Low) 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 THROUGHOUT 2PQM 1.87 27.47 58645 2873 98.78 0.2398 0.1861 0.1843 0.1894 0.2218 0.2248 RANDOM 27.6853
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] -0.03 -0.03 0.06
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 37.946 r_dihedral_angle_4_deg 17.59 r_dihedral_angle_3_deg 16.243 r_dihedral_angle_1_deg 6.522 r_angle_refined_deg 2.13 r_chiral_restr 0.156 r_bond_refined_d 0.022 r_gen_planes_refined 0.012
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 5192 Nucleic Acid Atoms Solvent Atoms 251 Heterogen Atoms 5
Software Software Software Name Purpose SCALEPACK data scaling REFMAC refinement PDB_EXTRACT data extraction MAR345dtb data collection AUTOMAR data reduction MOLREP phasing