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Crystal structure of a thermophilic xylanase A from Bacillus subtilis 1A1 quadruple mutant Q7H/G13R/S22P/S179C
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1XXN
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, SITTING DROP 7 295 0.1 M HEPES and 0.6 M sodium tartrate
Crystal Properties Matthews coefficient Solvent content 2.03 39.27
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 44.178 α = 90 b = 52.002 β = 91.28 c = 72.474 γ = 90
Symmetry Space Group P 1 21 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 CCD MARMOSAIC 225 mm CCD 2007-07-12 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON LNLS BEAMLINE W01B-MX2 1.5497 LNLS W01B-MX2
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 2.2 42.247 100 0.09 9.1 3.6 16886
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 2.2 2.32 100 0.197 3.5 3.6
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 (DCC) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT THROUGHOUT 1XXN 2.2 20.33 15950 895 99.84 0.1871 0.1837 0.2485 0.2479 RANDOM 26.818
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] 0.02 -0.01
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 36.171 r_dihedral_angle_4_deg 13.884 r_dihedral_angle_3_deg 13.273 r_dihedral_angle_1_deg 6.833 r_angle_refined_deg 1.031 r_chiral_restr 0.071 r_bond_refined_d 0.006 r_gen_planes_refined 0.006
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 2909 Nucleic Acid Atoms Solvent Atoms 209 Heterogen Atoms
Software Software Software Name Purpose MOSFLM data reduction SCALA data scaling MOLREP phasing REFMAC refinement PDB_EXTRACT data extraction