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X-RAY DIFFRACTION
Materials and Methods page
1EXQ
  •   Crystallization Hide
    Crystallization Experiments
    Method VAPOR DIFFUSION, HANGING DROP
    pH 5.6
    Temperature 20.0
    Details ammonium sulfate, cadmium chloride, Na citrate, DTT, pH 5.6, VAPOR DIFFUSION, HANGING DROP, temperature 20K
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 48.89 α = 90
    b = 48.89 β = 90
    c = 103.64 γ = 120
     
    Space Group
    Space Group Name:    P 32
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 90
     
    Diffraction Detector
    Detector IMAGE PLATE
    Type MARRESEARCH
    Collection Date 1998-12-03
     
    Diffraction Radiation
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source SYNCHROTRON
    Type SSRL BEAMLINE BL7-1
    Wavelength 1.08
    Site SSRL
    Beamline BL7-1
     
     
  •   Refinement Data Hide
    Reflection Details
    Observed Criterion Sigma (F) 0.0
    Observed Criterion Sigma(I) 0.0
    Resolution(High) 1.6
    Resolution(Low) 22.1
    Number Reflections(All) 213312
    Number Reflections(Observed) 35599
    Percent Possible(Observed) 97.2
    R Merge I(Observed) 0.053
    B(Isotropic) From Wilson Plot 24.3
    Redundancy 6.0
     
    High Resolution Shell Details
    Resolution(High) 1.6
    Resolution(Low) 1.7
    Percent Possible(All) 95.9
     
     
  •   Refinement Hide
    Refinement Statistics
    reflnsShellList 1.6
    Resolution(Low) 22.11
    Cut-off Sigma(I) 0.0
    Cut-off Sigma(F) 0.0
    Number of Reflections(all) 36624
    Number of Reflections(Observed) 35599
    Number of Reflections(R-Free) 2693
    Percent Reflections(Observed) 97.2
    R-Factor(All) 0.253
    R-Factor(Observed) 0.253
    R-Work 0.253
    R-Free 0.271
    R-Free Selection Details RANDOM
     
    Temperature Factor Modeling
    Isotropic Thermal Model RESTRAINED
    Mean Isotropic B Value 32.5
    Anisotropic B[1][1] 3.82
    Anisotropic B[1][2] 3.44
    Anisotropic B[1][3] 0.0
    Anisotropic B[2][2] 3.82
    Anisotropic B[2][3] 0.0
    Anisotropic B[3][3] -7.64
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 1.6
    Shell Resolution(Low) 1.7
    Number of Reflections(R-Free) 491
    Number of Reflections(R-Work) 5352
    R-Factor(R-Work) 0.369
    R-Factor(R-Free) 0.356
    R-Free Error 0.016
    Percent Reflections(Observed) 95.9
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    c_improper_angle_d 0.69
    c_dihedral_angle_d 22.0
    c_angle_deg 1.1
    c_bond_d 0.005
     
    Coordinate Error
    Luzzati ESD(Observed) 0.25
    Luzzati Sigma A(Observed) 0.31
    Luzzati Resolution Cutoff(Low) 5.0
    Luzzati ESD(R-Free Set) 0.28
    Luzzati Sigma A(R-Free Set) 0.31
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 2217
    Nucleic Acid Atoms 0
    Heterogen Atoms 26
    Solvent Atoms 99
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) MAR
    Data Reduction (data scaling) SCALEPACK
    Structure Solution CNS
    Structure Refinement CNS
     
    Software
    refinement CNS
    model building CNS