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X-RAY DIFFRACTION
Materials and Methods page
1G7B
  •   Crystallization Hide
    Crystallization Experiments
    Method SLOW COOLING
    pH 6.3
    Temperature 298.0
    Details 5 mg/ml human insulin, 0.01 M HCl, 0.007 M zinc acetate, 0.05 M sodium citrate, 17% acetone, 1.0 M NaCl. pH 6.3, SLOW COOLING at 298K
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 80.05 α = 90
    b = 80.05 β = 90
    c = 71.46 γ = 120
     
    Space Group
    Space Group Name:    H 3
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 100
     
    Diffraction Detector
    Detector CCD
    Type ADSC QUANTUM 4
    Collection Date 1999-03-20
     
    Diffraction Radiation
    Monochromator Silicon
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source SYNCHROTRON
    Type NSLS BEAMLINE X8C
    Wavelength List 0.8000
    Site NSLS
    Beamline X8C
     
     
  •   Refinement Data Hide
    Reflection Details
    Observed Criterion Sigma (F) 0.0
    Observed Criterion Sigma(I) 0.0
    Resolution(High) 1.3
    Resolution(Low) 31.8
    Number Reflections(All) 41901
    Number Reflections(Observed) 41901
    Percent Possible(Observed) 100.0
    R Merge I(Observed) 0.06
    B(Isotropic) From Wilson Plot 19.4
    Redundancy 12.5
     
    High Resolution Shell Details
    Resolution(High) 1.3
    Resolution(Low) 1.33
    Percent Possible(All) 100.0
    R Merge I(Observed) 0.393
    Mean I Over Sigma(Observed) 8.6
    Redundancy 7.2
    Number Unique Reflections(All) 2792
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method MOLECULAR REPLACEMENT
    reflnsShellList 1.3
    Resolution(Low) 31.8
    Cut-off Sigma(I) 0.0
    Cut-off Sigma(F) 0.0
    Number of Reflections(all) 41901
    Number of Reflections(Observed) 41901
    Number of Reflections(R-Free) 4231
    Percent Reflections(Observed) 100.0
    R-Work 0.176
    R-Free 0.204
    R-Free Selection Details Random
     
    Temperature Factor Modeling
    Isotropic Thermal Model Restrained
    Mean Isotropic B Value 18.2
    Anisotropic B[1][1] -0.5
    Anisotropic B[1][2] 0.18
    Anisotropic B[1][3] 0.0
    Anisotropic B[2][2] -0.5
    Anisotropic B[2][3] 0.0
    Anisotropic B[3][3] 1.01
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 1.3
    Shell Resolution(Low) 1.38
    Number of Reflections(Observed) 6219
    Number of Reflections(R-Free) 688
    Number of Reflections(R-Work) 6219
    R-Factor(R-Work) 0.209
    R-Factor(R-Free) 0.236
    R-Free Error 0.009
    Percent Reflections(Observed) 100.0
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    c_scangle_it 2.73
    c_scbond_it 2.16
    c_mcangle_it 2.66
    c_mcbond_it 1.87
    c_improper_angle_d 0.89
    c_dihedral_angle_d 20.4
    c_angle_deg 1.92
    c_bond_d 0.01
     
    Coordinate Error
    Luzzati ESD(Observed) 0.13
    Luzzati Sigma A(Observed) 0.08
    Luzzati Resolution Cutoff(Low) 5.0
    Luzzati ESD(R-Free Set) 0.15
    Luzzati Sigma A(R-Free Set) 0.09
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 1573
    Nucleic Acid Atoms 0
    Heterogen Atoms 24
    Solvent Atoms 212
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) DENZO
    Data Reduction (data scaling) SCALEPACK
    Structure Solution CNS
    Structure Refinement CNS 1.0
     
    Software
    refinement CNS version: 1.0
    model building CNS
    data reduction SCALEPACK
    data collection DENZO