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Snapshots of serine protease catalysis: (D) acyl-enzyme intermediate between porcine pancreatic elastase and human beta-casomorphin-7 jumped to pH 10 for 2 minutes
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 1.78 30.3
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 49.63 α = 90 b = 57.6 β = 90 c = 73.44 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 PRINCETON 1997-01-15 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 2.05 26.8 93.3 0.105 9.6 2.7 12678 12.6
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) 1 2.05 2.1 85.9 0.254 6.8 2.4
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-Work (DCC) R-Free (Depositor) R-Free (DCC) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT THROUGHOUT PDB ENTRY 1QIX 2.05 38 12678 510 92.3 0.199 0.199 0.1986 0.246 0.2471 RANDOM 15.6
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] -10.3 2.346 7.954
RMS Deviations Key Refinement Restraint Deviation c_scangle_it 2.564 c_mcangle_it 1.851 c_scbond_it 1.845 c_mcbond_it 1.279 c_angle_deg 1.25 c_bond_d 0.005 c_bond_d_na c_bond_d_prot c_angle_d c_angle_d_na
RMS Deviations Key Refinement Restraint Deviation c_scangle_it 2.564 c_mcangle_it 1.851 c_scbond_it 1.845 c_mcbond_it 1.279 c_angle_deg 1.25 c_bond_d 0.005 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 1810 Nucleic Acid Atoms Solvent Atoms 120 Heterogen Atoms 6
Software Software Software Name Purpose CNS refinement DENZO data reduction SCALEPACK data scaling