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X-RAY DIFFRACTION
Materials and Methods page
1C5T
  •   Crystallization Hide
    Crystallization Experiments
    pH 8.2
    Details trypsin-benzamidine, P3(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 1.73 M MgSO4 . 7 H2O, 150 mM Tris, 1 mM CaCl2, 2.0 % DMSO,saturated with inhibitor, 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 = 54.95 α = 90
    b = 54.95 β = 90
    c = 109.69 γ = 120
     
    Space Group
    Space Group Name:    P 31 2 1
     
     
  •   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 1998-02-13
     
    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) 28.89
    Number Reflections(All) 34816
    Percent Possible(Observed) 84.0
    R Merge I(Observed) 0.057
    Redundancy 3.1
     
    High Resolution Shell Details
    Resolution(High) 1.37
    Resolution(Low) 1.43
    Percent Possible(All) 35.1
    R Merge I(Observed) 0.218
    Mean I Over Sigma(Observed) 2.3
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method DIFFERENCE FOURIER PLUS REFINEMENT
    reflnsShellList 1.37
    Resolution(Low) 7.5
    Cut-off Sigma(F) 1.8
    Number of Reflections(Observed) 34186
    Number of Reflections(R-Free) 3343
    Percent Reflections(Observed) 84.0
    R-Factor(Observed) 0.176
    R-Work 0.176
    R-Free 0.195
     
    Temperature Factor Modeling
    Data Not Available
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 1.37
    Shell Resolution(Low) 1.43
    Number of Reflections(R-Free) 108
    Number of Reflections(R-Work) 1642
    R-Factor(R-Work) 0.467
    R-Factor(R-Free) 0.427
    Percent Reflections(Observed) 35.1
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    x_improper_angle_d 0.6
    x_dihedral_angle_d 26.2
    x_angle_deg 3.6
    x_bond_d 0.018
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 1629
    Nucleic Acid Atoms 0
    Heterogen Atoms 13
    Solvent Atoms 205
     
     
  •   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)