5R44
Crystal Structure of gamma-Chymotrypsin at pH 7.5, room temperature
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
---|---|---|---|---|
ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 297 | 45% saturated ammonium sulfate, 0.75% saturated cetyltrimethylammonium bromide, 100 mM sodium iodide; sodium malonate |
Crystal Properties | |
---|---|
Matthews coefficient | Solvent content |
2.23 | 44.78 |
Crystal Data
Unit Cell | |
---|---|
Length ( Å ) | Angle ( ˚ ) |
a = 69.258 | α = 90 |
b = 69.258 | β = 90 |
c = 97.979 | γ = 90 |
Symmetry | |
---|---|
Space Group | P 42 21 2 |
Diffraction
Diffraction Experiment | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
1 | 1 | x-ray | 297 | CCD | MARMOSAIC 300 mm CCD | 2009-07-15 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | APS BEAMLINE 23-ID-B | 0.9 | APS | 23-ID-B |
Data Collection
Overall | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | Net I Over Average Sigma (I) | Redundancy | Number Reflections (All) | Number Reflections (Observed) | Observed Criterion Sigma (F) | Observed Criterion Sigma (I) | B (Isotropic) From Wilson Plot | ||||||||
1 | 1.05 | 50 | 99 | 0.105 | 15.2 | 44.2 | 110206 |
Highest Resolution Shell | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||||
1 | 1.05 | 1.09 | 94.4 | 0.816 | 6.9 |
Refinement
Statistics | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | Resolution (High) | Resolution (Low) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (Observed) | R-Work | R-Free | R-Free Selection Details | Mean Isotropic B | ||||||
X-RAY DIFFRACTION | FOURIER SYNTHESIS | THROUGHOUT | 1GCT | 1.05 | 56.56 | 104405 | 5522 | 98.78 | 0.1142 | 0.1137 | 0.1219 | RANDOM | 18.468 |
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] | |
0.1 | 0.1 | -0.2 |
RMS Deviations | |
---|---|
Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 35.953 |
r_sphericity_free | 25.069 |
r_dihedral_angle_4_deg | 13.262 |
r_dihedral_angle_3_deg | 10.85 |
r_sphericity_bonded | 8.825 |
r_dihedral_angle_1_deg | 6.602 |
r_rigid_bond_restr | 2.065 |
r_angle_other_deg | 1.517 |
r_angle_refined_deg | 1.505 |
r_chiral_restr | 0.1 |
Non-Hydrogen Atoms Used in Refinement | |
---|---|
Non-Hydrogen Atoms | Number |
Protein Atoms | 1825 |
Nucleic Acid Atoms | |
Solvent Atoms | 171 |
Heterogen Atoms | 1 |
Software
Software | |
---|---|
Software Name | Purpose |
HKL-2000 | data reduction |
SCALEPACK | data scaling |
REFMAC | refinement |
PDB_EXTRACT | data extraction |
PHENIX | phasing |