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X-RAY DIFFRACTION
Materials and Methods page
3BTT
  •   Crystallization Hide
    Crystallization Experiments
    pH 7.5
    Details 0.1 M HEPES PH 7.5 48% AMMONIUM SULPHATE
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 75.62 α = 90
    b = 84.75 β = 90
    c = 122.85 γ = 90
     
    Space Group
    Space Group Name:    I 2 2 2
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 293
     
    Diffraction Detector
    Detector IMAGEPLATE
    Type MARRESEARCH
    Collection Date 1998-04
     
    Diffraction Radiation
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source SYNCHROTRON
    Type ESRF BEAMLINE BM1A
    Wavelength 0.873
    Site ESRF
    Beamline BM1A
     
     
  •   Refinement Data Hide
    Reflection Details
    Resolution(High) 1.9
    Resolution(Low) 15
    Number Reflections(Observed) 31278
    Percent Possible(Observed) 98.9
    R Merge I(Observed) 0.074
    B(Isotropic) From Wilson Plot 21.7
    Redundancy 3.2
     
    High Resolution Shell Details
    Resolution(High) 1.9
    Resolution(Low) 2.0
    Percent Possible(All) 99.1
    R Merge I(Observed) 0.3
    Mean I Over Sigma(Observed) 2.4
    R-Sym I(Observed) 0.3
    Redundancy 3.2
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method MOLECULAR REPLACEMENT
    reflnsShellList 1.9
    Resolution(Low) 8.0
    Cut-off Sigma(F) 1.0
    Number of Reflections(Observed) 30665
    Percent Reflections(Observed) 98.9
    R-Work 0.195
    R-Free 0.232
    R-Free Selection Details RANDOM
     
    Temperature Factor Modeling
    Mean Isotropic B Value 25.0
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 1.9
    Shell Resolution(Low) 2.0
    R-Factor(R-Work) 0.286
    R-Factor(R-Free) 0.337
    Percent Reflections(Observed) 99.0
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    x_bond_d 0.009
    x_angle_deg 1.87
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 2009
    Nucleic Acid Atoms 0
    Heterogen Atoms 21
    Solvent Atoms 151
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) DENZO
    Data Reduction (data scaling) CCP4
    Structure Solution X-PLOR
    Structure Refinement X-PLOR 3.8
     
    Software
    refinement X-PLOR version: 3.8
    model building X-PLOR
    data reduction CCP4
    data collection DENZO