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Materials and Methods page
1QB1
  •   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. REFERENCES 7 (BODE, TURK & STURZEBACHER) AND 8 (BARTUNIK, SUMMERS & BARTSH) HAVE DESCRIBED THE CRYSTALLIZATION OF THE ORTHORHOMBIC FORM OF BOVINE TRYPSIN. CRYSTALS WERE SEEDING INTO DROPS CONTAINING 40 MG/ML BOVINE TRYPSIN, 0.0125 M BENZAMIDINE, 0.7 TO 0.9 M AS, 0.05 M MES PH 6.0, 0.0025 M CACL2 AFTER EQUILIBRATION AGAINST THE CRYSTALLIZATION RESERVOIR FOR 1 DAY. THE CRYSTALLIZATION RESERVOIRS CONTAINED 1.4 TO 1.8 M AS, 0.1 M MES PH 6.0, 0.005 M CACL2., pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 297K
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 63.16 α = 90
    b = 63.78 β = 90
    c = 69.35 γ = 90
     
    Space Group
    Space Group Name:    P 21 21 21
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 297
     
    Diffraction Detector
    Detector IMAGE PLATE
    Type MARRESEARCH
    Details MIRRORS
    Collection Date 1995-04-12
     
    Diffraction Radiation
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source ROTATING ANODE
    Type SIEMENS
    Wavelength 1.5418
     
     
  •   Refinement Data Hide
    Reflection Details
    Observed Criterion Sigma (F) 0.0
    Observed Criterion Sigma(I) 2.0
    Resolution(High) 1.8
    Resolution(Low) 10
    Number Reflections(Observed) 26263
    Percent Possible(Observed) 99.0
    Redundancy 3.4
     
    High Resolution Shell Details
    Resolution(High) 1.8
    Resolution(Low) 1.9
    Percent Possible(All) 99.9
    Mean I Over Sigma(Observed) 3.11
    R-Sym I(Observed) 0.222
    Redundancy 3.11
     
     
  •   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) 22476
    Number of Reflections(Observed) 21586
    Number of Reflections(R-Free) 890
    Percent Reflections(Observed) 99.0
    R-Work 0.183
    R-Free 0.237
     
    Temperature Factor Modeling
    Data Not Available
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    p_transverse_tor 21.3
    p_staggered_tor 16.2
    p_planar_tor 3.0
    p_xyhbond_nbd 0.228
    p_multtor_nbd 0.214
    p_bond_d 0.016
    p_angle_d 0.03
    p_planar_d 0.044
    p_mcbond_it 1.628
    p_mcangle_it 2.429
    p_scbond_it 3.135
    p_scangle_it 4.552
    p_plane_restr 0.015
    p_chiral_restr 0.165
    p_singtor_nbd 0.167
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 1629
    Nucleic Acid Atoms 0
    Heterogen Atoms 42
    Solvent Atoms 218
     
     
  •   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