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X-RAY DIFFRACTION
Materials and Methods page
1QHC
  •   Crystallization Hide
    Crystallization Experiments
    Method VAPOR DIFFUSION, HANGING DROP
    pH 5.5
    Details CRYSTALLIZED FROM 20% PEG 4000, 20 MM SODIUM CITRATE, PH 5.5, VAPOR DIFFUSION, HANGING DROP
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 101.36 α = 90
    b = 33.21 β = 90.11
    c = 73.06 γ = 90
     
    Space Group
    Space Group Name:    C 1 2 1
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 293
     
    Diffraction Detector
    Detector IMAGE PLATE
    Type MARRESEARCH
    Collection Date 1998-07-15
     
    Diffraction Radiation
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source SYNCHROTRON
    Type SRS BEAMLINE PX7.2
    Wavelength 1.488
    Site SRS
    Beamline PX7.2
     
     
  •   Refinement Data Hide
    Reflection Details
    Observed Criterion Sigma(I) 0.0
    Resolution(High) 1.7
    Resolution(Low) 40
    Number Reflections(Observed) 25723
    Percent Possible(Observed) 94.5
    B(Isotropic) From Wilson Plot 25.8
    Redundancy 3.0
     
    High Resolution Shell Details
    Resolution(High) 1.7
    Resolution(Low) 1.76
    Percent Possible(All) 84.0
    Mean I Over Sigma(Observed) 2.05
    R-Sym I(Observed) 0.326
    Redundancy 1.8
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method MOLECULAR REPLACEMENT
    reflnsShellList 1.7
    Resolution(Low) 20.0
    Cut-off Sigma(F) 0.0
    Number of Reflections(Observed) 25665
    Number of Reflections(R-Free) 1295
    Percent Reflections(Observed) 94.3
    R-Work 0.2
    R-Free 0.26
    R-Free Selection Details RANDOM
     
    Temperature Factor Modeling
    Isotropic Thermal Model RESTRAINED
    Mean Isotropic B Value 32.1
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 1.7
    Shell Resolution(Low) 1.81
    Number of Reflections(R-Free) 180
    Number of Reflections(R-Work) 3527
    R-Factor(R-Work) 0.374
    R-Factor(R-Free) 0.386
    R-Free Error 0.029
    Percent Reflections(Observed) 82.6
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    x_scangle_it 4.6
    x_scbond_it 2.79
    x_mcangle_it 2.55
    x_mcbond_it 1.52
    x_improper_angle_d 0.82
    x_bond_d 0.01
    x_angle_deg 1.4
    x_dihedral_angle_d 27.3
     
    Coordinate Error
    Luzzati ESD(Observed) 0.22
    Luzzati Sigma A(Observed) 0.23
    Luzzati Resolution Cutoff(Low) 5.0
    Luzzati ESD(R-Free Set) 0.25
    Luzzati Sigma A(R-Free Set) 0.14
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 1902
    Nucleic Acid Atoms 0
    Heterogen Atoms 100
    Solvent Atoms 137
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) DENZO
    Data Reduction (data scaling) SCALEPACK
    Structure Solution AMORE
    Structure Refinement X-PLOR 3.851
     
    Software
    refinement X-PLOR version: 3.851
    model building AMORE
    data reduction SCALEPACK
    data collection DENZO