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X-RAY DIFFRACTION
Materials and Methods page
1C2E
  •   Crystallization Hide
    Crystallization Experiments
    pH 9
    Details BATCH, 1.51 M MGSO4 . 7 H2O, 0.59 MM TRYPSIN, 1.0 MM ZN(II) 5.0 % DMSO: CRYSTALLIZATION SOLUTION WAS SATURATED IN KETO-BABIM. CRYSTAL WAS TRANSFERRED TO SYNTHETIC MOTHER LIQUOR CONTAINING ~0.4 MM ZN(II), PH 9.00 AND SOAKED FOR SEVERAL DAYS WITH SEVERAL REPLACEMENTS OF SOAKING SOLUTIONS. THE SOLUTION WAS SATURATED IN KETO-BABIM AND CONTAINED 2.0 % DMSO TO INCREASE INHIBITOR SOLUBILITY.
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 54.97 α = 90
    b = 54.97 β = 90
    c = 109.76 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 1997-02-10
     
    Diffraction Radiation
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source ROTATING ANODE
    Wavelength 1.5418
     
     
  •   Refinement Data Hide
    Reflection Details
    Observed Criterion Sigma(I) 1.3
    Resolution(High) 1.38
    Resolution(Low) 54.88
    Number Reflections(Observed) 18642
    Percent Possible(Observed) 68.0
    R Merge I(Observed) 0.087
    Redundancy 2.8
     
    High Resolution Shell Details
    Resolution(High) 1.65
    Resolution(Low) 1.72
    Percent Possible(All) 32.8
    R Merge I(Observed) 0.237
    Mean I Over Sigma(Observed) 1.9
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method DIFFERENCE FOURIER PLUS REFINEMENT
    reflnsShellList 1.65
    Resolution(Low) 7.5
    Cut-off Sigma(F) 2.0
    Number of Reflections(Observed) 16225
    Number of Reflections(R-Free) 1622
    Percent Reflections(Observed) 69.0
    R-Factor(Observed) 0.179
    R-Work 0.179
    R-Free 0.212
     
    Temperature Factor Modeling
    Data Not Available
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 1.65
    Shell Resolution(Low) 1.72
    Number of Reflections(R-Free) 94
    Number of Reflections(R-Work) 856
    R-Factor(R-Work) 0.361
    R-Factor(R-Free) 0.382
    Percent Reflections(Observed) 32.8
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    x_improper_angle_d 0.54
    x_bond_d 0.018
    x_angle_deg 3.9
    x_dihedral_angle_d 26.1
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 1629
    Nucleic Acid Atoms 0
    Heterogen Atoms 29
    Solvent Atoms 208
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) BIOTEX (MSC)
    Data Reduction (data scaling) BIOTEX
    Structure Solution X-PLOR, 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
    data reduction BIOTEX version: (MSC)
    data collection BIOTEX version: (MSC)