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Snapshots of serine protease catalysis: (C) acyl-enzyme intermediate between porcine pancreatic elastase and human beta-casomorphin-7 jumped to pH 9 for 1 minute
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 9 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 1.84 32.61
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 50.57 α = 90 b = 57.67 β = 90 c = 74.43 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 1.4 23.9 97.8 0.055 11.4 6.3 42481 12.9
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 1.4 1.44 93.9 0.146 6.3 2.6
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-Work (DCC) R-Free (Depositor) R-Free (DCC) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT THROUGHOUT PDB ENTRY 1QIX 1.4 38.1 43581 1721 97.8 0.199 0.199 0.2002 0.202 0.2012 RANDOM 13.6
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] -2.54 0.684 1.856
RMS Deviations Key Refinement Restraint Deviation c_scangle_it 2.358 c_scbond_it 1.704 c_mcangle_it 1.536 c_angle_deg 1.3 c_mcbond_it 1.007 c_bond_d 0.004 c_bond_d_na c_bond_d_prot c_angle_d c_angle_d_na
RMS Deviations Key Refinement Restraint Deviation c_scangle_it 2.358 c_scbond_it 1.704 c_mcangle_it 1.536 c_angle_deg 1.3 c_mcbond_it 1.007 c_bond_d 0.004 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 1842 Nucleic Acid Atoms Solvent Atoms 178 Heterogen Atoms 6
Software Software Software Name Purpose CNS refinement DENZO data reduction SCALEPACK data scaling