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X-RAY DIFFRACTION
Materials and Methods page
1C5Q
  •   Crystallization Hide
    Crystallization Experiments
    pH 8.2
    Details trypsin-benzamidine, P2(1)2(1)2(1) were grown by vapor diffusion, as described for P2(1) 2(1) 2(1) (large cell) (Mangel, et al., Biochemistry 29, 8351-8357, 1990) The crystal was soaked in a solution of 85 % MgSO4 . 7 H2O, 1 mM CaCl2, 2.0 % DMSO, saturated with inhibitor, 100 mM Tris, pH 8.20 over a period of several days with several replacements of the soaking solution.
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 63.87 α = 90
    b = 64.11 β = 90
    c = 69.49 γ = 90
     
    Space Group
    Space Group Name:    P 21 21 21
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 298
     
    Diffraction Detector
    Detector IMAGE PLATE
    Type RIGAKU RAXIS IV++
    Details MSC MIRRORS
    Collection Date 1997-10-14
     
    Diffraction Radiation
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source ROTATING ANODE
    Wavelength 1.5418
     
     
  •   Refinement Data Hide
    Reflection Details
    Observed Criterion Sigma(I) 1.0
    Resolution(High) 1.33
    Resolution(Low) 31.93
    Number Reflections(All) 41527
    Percent Possible(Observed) 75.0
    R Merge I(Observed) 0.087
    Redundancy 2.1
     
    High Resolution Shell Details
    Resolution(High) 1.43
    Resolution(Low) 1.49
    Percent Possible(All) 39.1
    R Merge I(Observed) 0.259
    Mean I Over Sigma(Observed) 2.1
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method DIFFERENCE FOURIER PLUS REFINEMENT
    reflnsShellList 1.43
    Resolution(Low) 7.5
    Cut-off Sigma(F) 2.0
    Number of Reflections(Observed) 39655
    Number of Reflections(R-Free) 3987
    Percent Reflections(Observed) 75.0
    R-Factor(Observed) 0.197
    R-Work 0.197
    R-Free 0.221
     
    Temperature Factor Modeling
    Data Not Available
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 1.43
    Shell Resolution(Low) 1.49
    Number of Reflections(R-Free) 257
    Number of Reflections(R-Work) 2298
    R-Factor(R-Work) 0.375
    R-Factor(R-Free) 0.382
    Percent Reflections(Observed) 39.1
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    x_improper_angle_d 0.54
    x_dihedral_angle_d 26.2
    x_angle_deg 3.8
    x_bond_d 0.018
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 1629
    Nucleic Acid Atoms 0
    Heterogen Atoms 15
    Solvent Atoms 244
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) BIOTEX (MSC)
    Data Reduction (data scaling) BIOTEX
    Structure Solution X-PLOR 3.1, QUANTA, INSIGHTII
    Structure Refinement X-PLOR 3.1
     
    Software
    refinement X-PLOR version: 3.1
    model building INSIGHTII
    model building QUANTA
    model building X-PLOR version: 3.1
    data reduction BIOTEX version: (MSC)
    data collection BIOTEX version: (MSC)