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X-RAY DIFFRACTION
Materials and Methods page
3ERD
  •   Crystallization Hide
    Crystallization Experiments
    pH 8.5
    Details WELL: 25-27%(W/V) PEG 4000, 0.180 M SODIUM ACETATE, 0.90 M TRIS PH 8.75-9.0 PROTEIN: 4.3 G/L TEMPERATURE: 19-21 DEGREES C, pH 8.5
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 54.09 α = 90
    b = 82.22 β = 111.33
    c = 58.04 γ = 90
     
    Space Group
    Space Group Name:    P 1 21 1
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 100
     
    Diffraction Detector
    Detector IMAGE PLATE
    Type MARRESEARCH
    Details PT COATED, FUSED SILICA
    Collection Date 1998-05
     
    Diffraction Radiation
    Monochromator SI(111)
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source SYNCHROTRON
    Type SSRL BEAMLINE BL7-1
    Wavelength 1.08
    Site SSRL
    Beamline BL7-1
     
     
  •   Refinement Data Hide
    Reflection Details
    Observed Criterion Sigma(I) -3.0
    Resolution(High) 2.03
    Resolution(Low) 27
    Number Reflections(Observed) 30265
    Percent Possible(Observed) 98.4
    B(Isotropic) From Wilson Plot 19.8
    Redundancy 3.4
     
    High Resolution Shell Details
    Resolution(High) 2.03
    Resolution(Low) 2.07
    Percent Possible(All) 98.0
    Mean I Over Sigma(Observed) 1.8
    R-Sym I(Observed) 0.519
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method MOLECULAR REPLACEMENT
    reflnsShellList 2.03
    Resolution(Low) 27.0
    Cut-off Sigma(F) 0.0
    Number of Reflections(Observed) 30148
    Number of Reflections(R-Free) 2039
    Percent Reflections(Observed) 98.4
    R-Work 0.196
    R-Free 0.248
    R-Free Selection Details RANDOM
     
    Temperature Factor Modeling
    Mean Isotropic B Value 33.9
    Anisotropic B[1][1] 0.939
    Anisotropic B[1][2] 0.0
    Anisotropic B[1][3] -2.07
    Anisotropic B[2][2] -4.7
    Anisotropic B[2][3] 0.0
    Anisotropic B[3][3] 3.767
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 2.03
    Shell Resolution(Low) 2.12
    Number of Reflections(R-Free) 262
    Number of Reflections(R-Work) 3489
    R-Factor(R-Work) 0.264
    R-Factor(R-Free) 0.297
    Percent Reflections(Observed) 98.3
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    x_improper_angle_d 0.608
    x_bond_d 0.005
    x_angle_deg 1.01
    x_dihedral_angle_d 21.6
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 3950
    Nucleic Acid Atoms 0
    Heterogen Atoms 49
    Solvent Atoms 147
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) DENZO
    Data Reduction (data scaling) SCALEPACK
    Structure Solution AMORE
    Structure Refinement X-PLOR 3.854
     
    Software
    refinement X-PLOR version: 3.854
    model building AMORE