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Crystal structure of the extracellular xylanase from Geobacillus stearothermophilus T-6 (XT6, monoclinic form): The E159A/E265A mutant at 1.8A resolution
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1R85 PDB code 1R85
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 6.5 293 14% PEG 4000, MES buffer pH 6.5, 10mM ZnSO4, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Crystal Properties Matthews coefficient Solvent content 3.31 62.85
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 121.244 α = 90 b = 61.251 β = 119.28 c = 89.463 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 100 IMAGE PLATE RIGAKU RAXIS IV++ 2001-10-25 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 ROTATING ANODE RIGAKU
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 1.8 40 90.9 0.05 13.3 2.5 48254 20.4
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 1.8 1.83 90.5 0.481 2419
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 (Observed) R-Work (Depositor) R-Free (Depositor) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION AB INITIO PHASING THROUGHOUT PDB code 1R85 1.8 40 48254 2338 90.9 0.181 0.181 0.215 RANDOM 26.2
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] 3.91 0.61 0.17 -4.08
RMS Deviations Key Refinement Restraint Deviation c_dihedral_angle_d 23.7 c_scangle_it 2.81 c_scbond_it 1.97 c_angle_deg 1.9 c_mcangle_it 1.79 c_improper_angle_d 1.26 c_mcbond_it 1.25 c_bond_d 0.02
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 3028 Nucleic Acid Atoms Solvent Atoms 326 Heterogen Atoms 14
Software Software Software Name Purpose CNS refinement DENZO data reduction SCALEPACK data scaling CNS phasing