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X-RAY DIFFRACTION
Materials and Methods page
1C2D
  •   Crystallization Hide
    Crystallization Experiments
    pH 9.93
    Details BATCH, 1.51 M MGSO4.7H2O, 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 9.93 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 = 54.94 α = 90
    b = 54.94 β = 90
    c = 109.75 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 1997-02-14
     
    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) 1.38
    Resolution(Low) 54.87
    Number Reflections(Observed) 18454
    Percent Possible(Observed) 64.0
    R Merge I(Observed) 0.107
    Redundancy 2.8
     
    High Resolution Shell Details
    Resolution(High) 1.65
    Resolution(Low) 1.72
    Percent Possible(All) 38.2
    R Merge I(Observed) 0.253
    Mean I Over Sigma(Observed) 1.6
     
     
  •   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) 15458
    Number of Reflections(R-Free) 1464
    Percent Reflections(Observed) 64.0
    R-Factor(Observed) 0.193
    R-Work 0.193
    R-Free 0.211
     
    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) 90
    Number of Reflections(R-Work) 989
    R-Factor(R-Work) 0.376
    R-Factor(R-Free) 0.433
    Percent Reflections(Observed) 38.2
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    x_improper_angle_d 0.54
    x_bond_d 0.017
    x_angle_deg 3.9
    x_dihedral_angle_d 25.7
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 1629
    Nucleic Acid Atoms 0
    Heterogen Atoms 30
    Solvent Atoms 232
     
     
  •   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)