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X-RAY DIFFRACTION
Materials and Methods page
1CQX
  •   Crystallization Hide
    Crystallization Experiments
    Method VAPOR DIFFUSION, HANGING DROP
    pH 6.3
    Temperature 281.0
    Details protein solution: TRIS, potassium chloride, DTT, plus precipitant; precipitant: PEG 3350, sodium chloride, sodium citrate, pH 6.3, VAPOR DIFFUSION, HANGING DROP, temperature 281K
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 52.2 α = 90
    b = 85.8 β = 81.8
    c = 103.9 γ = 90
     
    Space Group
    Space Group Name:    P 1 21 1
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 277
     
    Diffraction Detector
    Detector IMAGE PLATE
    Type MARRESEARCH
    Collection Date 1993-12-01
     
    Diffraction Radiation
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source SYNCHROTRON
    Type MPG/DESY, HAMBURG BEAMLINE BW6
    Wavelength 1.0
    Site MPG/DESY, HAMBURG
    Beamline BW6
     
     
  •   Refinement Data Hide
    Reflection Details
    Observed Criterion Sigma(I) 0.0
    Resolution(High) 1.75
    Resolution(Low) 50
    Number Reflections(Observed) 196672
    Percent Possible(Observed) 90.5
    R Merge I(Observed) 0.052
    B(Isotropic) From Wilson Plot 19.9
    Redundancy 2.4
     
    High Resolution Shell Details
    Resolution(High) 1.75
    Resolution(Low) 1.84
    Percent Possible(All) 62.7
    R Merge I(Observed) 0.151
    Redundancy 1.4
    Number Unique Reflections(All) 8118
     
     
  •   Refinement Hide
    Refinement Statistics
    reflnsShellList 1.75
    Resolution(Low) 10.0
    Cut-off Sigma(I) 0.0
    Cut-off Sigma(F) 0.0
    Number of Reflections(Observed) 80753
    Number of Reflections(R-Free) 4066
    Percent Reflections(Observed) 89.7
    R-Work 0.182
    R-Free 0.215
    R-Free Selection Details RANDOM
     
    Temperature Factor Modeling
    Isotropic Thermal Model RESTRAINED
    Mean Isotropic B Value 28.7
    Anisotropic B[1][1] 0.84
    Anisotropic B[1][2] 0.0
    Anisotropic B[1][3] 0.53
    Anisotropic B[2][2] -0.58
    Anisotropic B[2][3] 0.0
    Anisotropic B[3][3] -0.26
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 1.75
    Shell Resolution(Low) 1.86
    Number of Reflections(R-Free) 433
    Number of Reflections(R-Work) 8162
    R-Factor(R-Work) 0.257
    R-Factor(R-Free) 0.254
    R-Free Error 0.012
    Percent Reflections(Observed) 56.9
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    c_scangle_it 16.25
    c_scbond_it 24.2
    c_mcangle_it 2.18
    c_mcbond_it 1.3
    c_improper_angle_d 1.53
    c_dihedral_angle_d 22.6
    c_angle_deg 1.8
    c_bond_d 0.007
     
    Coordinate Error
    Luzzati ESD(Observed) 0.2
    Luzzati Sigma A(Observed) 0.19
    Luzzati Resolution Cutoff(Low) 5.0
    Luzzati ESD(R-Free Set) 0.22
    Luzzati Sigma A(R-Free Set) 0.16
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 6316
    Nucleic Acid Atoms 0
    Heterogen Atoms 283
    Solvent Atoms 581
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) MOSFLM
    Data Reduction (data scaling) CCP4 (AGROVATA, ROTAVATA)
    Structure Solution MLPHARE
    Structure Refinement X-PLOR
     
    Software
    refinement X-PLOR
    model building MLPHARE
    data reduction ROTAVATA-AGRAVATA
    data collection MOSFLM