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Snapshots of serine protease catalysis: (B) acyl-enzyme intermediate between porcine pancreatic elastase and human beta-casomorphin-7 jumped to pH 10 for 10 seconds
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1QIX PDB ENTRY 1QIX
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 10 CRYSTALLISED FROM 25MM SODIUM SULPHATE, 25MM SODIUM ACETATE (PH 5.0), 25 MG/ML PPE AND 25 MG/ML BCM7.
Crystal Properties Matthews coefficient Solvent content 1.79 30.83
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 49.74 α = 90 b = 57.87 β = 90 c = 73.47 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 100 CCD MARRESEARCH 1998-06-15 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON ESRF BEAMLINE ID14-3 ESRF ID14-3
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 1.7 37.7 97.7 0.06 20.9 3.6 23364 16.1
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 1.7 1.79 91 0.275 3.7 3.4
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 MOLECULAR REPLACEMENT THROUGHOUT PDB ENTRY 1QIX 1.7 38 23364 966 97.7 0.195 0.195 0.214 RANDOM 17.9
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] -6.087 2.056 4.031
RMS Deviations Key Refinement Restraint Deviation c_scangle_it 2.59 c_scbond_it 1.732 c_mcangle_it 1.716 c_angle_deg 1.29 c_mcbond_it 1.126 c_bond_d 0.0047 c_bond_d_na c_bond_d_prot c_angle_d c_angle_d_na
RMS Deviations Key Refinement Restraint Deviation c_scangle_it 2.59 c_scbond_it 1.732 c_mcangle_it 1.716 c_angle_deg 1.29 c_mcbond_it 1.126 c_bond_d 0.0047 c_bond_d_na c_bond_d_prot c_angle_d c_angle_d_na c_angle_d_prot c_angle_deg_na c_angle_deg_prot c_dihedral_angle_d c_dihedral_angle_d_na c_dihedral_angle_d_prot c_improper_angle_d c_improper_angle_d_na c_improper_angle_d_prot
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 1809 Nucleic Acid Atoms Solvent Atoms 137 Heterogen Atoms 6
Software Software Software Name Purpose CNS refinement MOSFLM data reduction SCALA data scaling