5R44

Crystal Structure of gamma-Chymotrypsin at pH 7.5, room temperature


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP29745% saturated ammonium sulfate, 0.75% saturated cetyltrimethylammonium bromide, 100 mM sodium iodide; sodium malonate
Crystal Properties
Matthews coefficientSolvent content
2.2344.78

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 69.258α = 90
b = 69.258β = 90
c = 97.979γ = 90
Symmetry
Space GroupP 42 21 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray297CCDMARMOSAIC 300 mm CCD2009-07-15MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAPS BEAMLINE 23-ID-B0.9APS23-ID-B

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
11.0550990.10515.244.2110206
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.051.0994.40.8166.9

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONFOURIER SYNTHESISTHROUGHOUT1GCT1.0556.56104405552298.780.11420.11370.1219RANDOM18.468
Temperature Factor Modeling
Anisotropic B[1][1]Anisotropic B[1][2]Anisotropic B[1][3]Anisotropic B[2][2]Anisotropic B[2][3]Anisotropic B[3][3]
0.10.1-0.2
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg35.953
r_sphericity_free25.069
r_dihedral_angle_4_deg13.262
r_dihedral_angle_3_deg10.85
r_sphericity_bonded8.825
r_dihedral_angle_1_deg6.602
r_rigid_bond_restr2.065
r_angle_other_deg1.517
r_angle_refined_deg1.505
r_chiral_restr0.1
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg35.953
r_sphericity_free25.069
r_dihedral_angle_4_deg13.262
r_dihedral_angle_3_deg10.85
r_sphericity_bonded8.825
r_dihedral_angle_1_deg6.602
r_rigid_bond_restr2.065
r_angle_other_deg1.517
r_angle_refined_deg1.505
r_chiral_restr0.1
r_bond_refined_d0.011
r_gen_planes_refined0.008
r_gen_planes_other0.004
r_bond_other_d0.001
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1825
Nucleic Acid Atoms
Solvent Atoms171
Heterogen Atoms1

Software

Software
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
PHENIXphasing