4CI9
Crystal structure of cathepsin A, apo-structure
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 4AZ0 | PDB ENTRY 4AZ0 |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 4.6 | 277 | CATHEPSIN A WAS CRYSTALLIZED USING THE HANGING DROP METHOD: 1 UL OF PROTEIN SOLUTION, CONTAINING 6.5 MG/ML CATHEPSIN A, 25 MM TRIS-HCL (PH 8.0) AND 300 MM NACL, WAS MIXED WITH 1 UL RESERVOIR SOLUTION, CONTAINING 100 MM NAACETATE (PH 4.5), 18-20% PEG400 AND 100 MM CDCL2, AND SET TO EQUILIBRATE AT 4DEG.C. ROD-SHAPED CRYSTALS APPEARED IN ABOUT ONE WEEK. |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.34 | 47.4 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 90.31 | α = 90 |
b = 102.03 | β = 101.27 |
c = 48.55 | γ = 90 |
Symmetry | |
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Space Group | C 1 2 1 |
Diffraction
Diffraction Experiment | ||||||||||||||
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ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
1 | 1 | x-ray | 100 | PIXEL | DECTRIS PILATUS | 2012-03-12 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | SLS BEAMLINE X10SA | SLS | X10SA |
Data Collection
Overall | |||||||||||||||||||
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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 | 1.58 | 33.44 | 96.6 | 0.04 | 18.1 | 3.3 | 56973 | -3 | 19.14 |
Highest Resolution Shell | |||||||||||||||||||
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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 | 1.58 | 1.66 | 94.3 | 0.35 | 2.3 | 2.3 |
Refinement
Statistics | |||||||||||||||||||
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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 | MOLECULAR REPLACEMENT | THROUGHOUT | PDB ENTRY 4AZ0 | 1.58 | 33.44 | 56890 | 2843 | 96.52 | 0.1662 | 0.1649 | 0.1905 | RANDOM | 23.01 |
Temperature Factor Modeling | ||||||
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Anisotropic B[1][1] | Anisotropic B[1][2] | Anisotropic B[1][3] | Anisotropic B[2][2] | Anisotropic B[2][3] | Anisotropic B[3][3] | |
3.1215 | 2.4778 | 0.3008 | -3.4223 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
t_other_torsion | 16.59 |
t_omega_torsion | 2.84 |
t_angle_deg | 0.91 |
t_bond_d | 0.007 |
t_dihedral_angle_d | |
t_incorr_chiral_ct | |
t_pseud_angle | |
t_trig_c_planes | |
t_gen_planes | |
t_it |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 3302 |
Nucleic Acid Atoms | |
Solvent Atoms | 614 |
Heterogen Atoms | 84 |
Software
Software | |
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Software Name | Purpose |
BUSTER | refinement |
XDS | data reduction |
SCALA | data scaling |
PHASER | phasing |