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X-RAY DIFFRACTION
Materials and Methods page
2B4C
  •   Crystallization Hide
    Crystallization Experiments
    pH 5.5
    Temperature 293.0
    Details ammonium sulfate, VAPOR DIFFUSION, HANGING DROP, temperature 293K, pH 5.50
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 225.99 α = 90
    b = 225.99 β = 90
    c = 97.97 γ = 120
     
    Space Group
    Space Group Name:    P 6 2 2
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 100
     
    Diffraction Detector
    Detector CCD
    Type MARRESEARCH
    Collection Date 2004-03-12
     
    Diffraction Radiation
    Monochromator SI (220)
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source SYNCHROTRON
    Type APS BEAMLINE 22-ID
    Wavelength 1.0
    Site APS
    Beamline 22-ID
     
     
  •   Refinement Data Hide
    Reflection Details
    Observed Criterion Sigma(I) -3.0
    Resolution(High) 3.3
    Resolution(Low) 20
    Number Reflections(Observed) 19372
    Percent Possible(Observed) 86.6
    R Merge I(Observed) 0.082
    Redundancy 9.6
     
    High Resolution Shell Details
    Resolution(High) 3.3
    Resolution(Low) 3.42
    Percent Possible(All) 20.9
    Mean I Over Sigma(Observed) 1.3
    R-Sym I(Observed) 0.505
    Redundancy 3.1
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method MOLECULAR REPLACEMENT
    reflnsShellList 3.3
    Resolution(Low) 20.0
    Cut-off Sigma(F) 0.0
    Number of Reflections(all) 22571
    Number of Reflections(Observed) 19364
    Number of Reflections(R-Free) 1920
    Percent Reflections(Observed) 86.2
    R-Factor(Observed) 0.319
    R-Work 0.319
    R-Free 0.349
    R-Free Selection Details RANDOM
     
    Temperature Factor Modeling
    Mean Isotropic B Value 126.2
    Anisotropic B[1][1] 11.12
    Anisotropic B[1][2] 19.38
    Anisotropic B[1][3] 0.0
    Anisotropic B[2][2] 11.12
    Anisotropic B[2][3] 0.0
    Anisotropic B[3][3] -22.25
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 3.3
    Shell Resolution(Low) 3.51
    Number of Reflections(R-Free) 110
    Number of Reflections(R-Work) 927
    R-Factor(R-Work) 0.415
    R-Factor(R-Free) 0.447
    R-Free Error 0.043
    Percent Reflections(Observed) 28.1
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    c_improper_angle_d 0.64
    c_bond_d 0.004
    c_angle_deg 0.98
    c_dihedral_angle_d 26.3
     
    Coordinate Error
    Luzzati ESD(Observed) 0.61
    Luzzati Sigma A(Observed) 0.83
    Luzzati Resolution Cutoff(Low) 5.0
    Luzzati ESD(R-Free Set) 0.68
    Luzzati Sigma A(R-Free Set) 0.97
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 7396
    Nucleic Acid Atoms 0
    Heterogen Atoms 121
    Solvent Atoms 0
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) HKL-2000
    Data Reduction (data scaling) SCALEPACK
    Structure Solution CNS
    Structure Refinement CNS 1.1
     
    Software
    refinement CNS version: 1.1
    model building CNS
    data reduction SCALEPACK
    data collection HKL-2000