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X-RAY DIFFRACTION
Materials and Methods page
1KI2
  •   Crystallization Hide
    Crystallization Experiments
    Method vapor diffusion - hanging drop
    pH 7.5
    Details HANGING-DROP: 8ML PROTEIN SOLUTION PLUS 4ML PRECIPITATING SOLUTION EQUILIBRATED AGAINST PRECIPITATING SOLUTION AT 25O C. PROTEIN SOLUTION: HSV-TK 1.0MG/ML; 40MM TRIS-CL PH 7.5; 3MM DTT; 0.2MM DT. PRECIPITATING SOLUTION: 30% SATURATED AMMONIUM SULPHATE; 200MM TRIS-CL PH 6.75; 3MM DTT; 0.2 MM DT. THE EXCHANGE OF DEOXYTHYMIDINE BOUND TO THE PROTEIN FOR GANCICLOVIR WAS MADE BY WASHING THE CRYSTALS FIVE TIMES IN A 3 ML SOLUTION (33% SATURATED AMMONIUM SULPHATE; 100MM TRIS-CL PH 6.75) CONTAINING GANCICLOVIR., vapor diffusion - hanging drop
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 114.9 α = 90
    b = 118.7 β = 90
    c = 109.1 γ = 90
     
    Space Group
    Space Group Name:    C 2 2 21
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 293
     
    Diffraction Detector
    Detector IMAGE PLATE
    Type RIGAKU RAXIS IIC
    Details MIRRORS
    Collection Date 1995-04
     
    Diffraction Radiation
    Monochromator OTWINOWSKI MIRRORS
     
    Diffraction Source
    Wavelength 1.5418
     
     
  •   Refinement Data Hide
    Reflection Details
    Observed Criterion Sigma(I) 0.0
    Resolution(High) 2.2
    Number Reflections(Observed) 28516
    Percent Possible(Observed) 74.6
    B(Isotropic) From Wilson Plot 28.6
    Redundancy 2.5
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method MIR + NCS IMPROVEMENT AND SOLVENT FLATTENING FOR ORIGINAL NATIVE, 1KIN
    reflnsShellList 2.2
    Resolution(Low) 12.0
    Cut-off Sigma(F) 2.2
    Number of Reflections(Observed) 28108
    Number of Reflections(R-Free) 2780
    Percent Reflections(Observed) 74.0
    R-Factor(Observed) 0.192
    R-Work 0.192
    R-Free 0.291
    R-Free Selection Details RANDOM
     
    Temperature Factor Modeling
    Isotropic Thermal Model INDIVIDUAL B-FACTOR REFT.
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 2.2
    Shell Resolution(Low) 2.28
    Number of Reflections(R-Free) 172
    Number of Reflections(R-Work) 1535
    R-Factor(R-Work) 0.293
    R-Factor(R-Free) 0.375
    Percent Reflections(Observed) 74.5
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    x_scangle_it 2.0
    x_scbond_it 1.5
    x_mcangle_it 2.0
    x_mcbond_it 1.5
    x_improper_angle_d 1.507
    x_bond_d 0.012
    x_angle_deg 1.863
    x_dihedral_angle_d 22.96
     
    Coordinate Error
    Luzzati ESD(Observed) 0.3
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 4720
    Nucleic Acid Atoms 0
    Heterogen Atoms 46
    Solvent Atoms 209
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) R-AXIS (HIGASHI/RIGAKU)
    Data Reduction (data scaling) PROCESS (HIGASHI)
    Structure Solution SOLOMON
    Structure Refinement X-PLOR 3.1
     
    Software
    refinement X-PLOR version: 3.1
    model building SOLOMON