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X-RAY DIFFRACTION
Materials and Methods page
1QBO
  •   Crystallization Hide
    Crystallization Experiments
    Method VAPOR DIFFUSION, HANGING DROP
    pH 7.4
    Temperature 297.0
    Details MICROCRYSTALS WERE INITIALLY GROWN USING THE HANGING DROP METHOD IN LINBRO CULTURE PLATES. CRYSTALLIZATION RESERVOIRS CONTAIN 1.8 - 2.0 M AMMONIUM SULFATE, 50 MM TRIS HCL, 10 MM CACL2, PH 7.4. SIX UL OF 15 MG/ML BOVINE TRYPSIN IN 20 MM 2-AMINOBENZIMIDAZOLE WAS ADDED TO 6 UL OF RESERVOIR. MACROSEEDING WAS USED TO GROW LARGE CRYSTALS (REF 5). SINGLE CRYSTALS WERE WASHED IN 0.8 M AMMONIUM SULFATE, 50 MM TRIS HCL, 10 MM CACL2, PH 7.4. THE WASHED CRYSTALS WERE PLACED IN A 18 HOUR OLD HANGING, VAPOR DIFFUSION, HANGING DROP, temperature 297K
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 55.02 α = 90
    b = 55.02 β = 90
    c = 109.14 γ = 120
     
    Space Group
    Space Group Name:    P 31 2 1
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 297
     
    Diffraction Detector
    Detector IMAGE PLATE
    Type RIGAKU RAXIS II
    Details MIRRORS
    Collection Date 1994-12-20
     
    Diffraction Radiation
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source ROTATING ANODE
    Type RIGAKU RU300
    Wavelength 1.5418
     
     
  •   Refinement Data Hide
    Reflection Details
    Observed Criterion Sigma(I) 2.0
    Resolution(High) 1.8
    Resolution(Low) 10
    Number Reflections(All) 17645
    Number Reflections(Observed) 15600
    Percent Possible(Observed) 95.4
    Redundancy 2.7
     
    High Resolution Shell Details
    Resolution(High) 1.8
    Resolution(Low) 2.1
    Percent Possible(All) 95.0
    R-Sym I(Observed) 0.202
    Redundancy 5.1
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method DIRECT REPLACEMENT
    reflnsShellList 1.8
    Resolution(Low) 10.0
    Cut-off Sigma(F) 2.0
    Number of Reflections(all) 15600
    Number of Reflections(Observed) 14976
    Number of Reflections(R-Free) 624
    Percent Reflections(Observed) 95.2
    R-Work 0.187
    R-Free 0.224
     
    Temperature Factor Modeling
    Data Not Available
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    p_transverse_tor 20.1
    p_staggered_tor 16.6
    p_planar_tor 2.6
    p_xyhbond_nbd 0.261
    p_multtor_nbd 0.18
    p_bond_d 0.016
    p_angle_d 0.032
    p_planar_d 0.04
    p_mcbond_it 1.744
    p_mcangle_it 2.413
    p_scbond_it 3.203
    p_scangle_it 4.301
    p_plane_restr 0.014
    p_chiral_restr 0.184
    p_singtor_nbd 0.173
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 1626
    Nucleic Acid Atoms 0
    Heterogen Atoms 36
    Solvent Atoms 155
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) DENZO
    Data Reduction (data scaling) SCALEPACK
    Structure Solution PROFFT
    Structure Refinement PROFFT
     
    Software
    refinement PROFFT
    model building PROFFT
    data reduction SCALEPACK
    data collection DENZO