6TAV
Crystal structure of endopeptidase-induced alpha2-macroglobulin
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 4ACQ |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 293 | Equivolumetric drops consisting of 0.2M tribasic ammonium citrate, pH6.4, 15% (w/v) polyethylene glycol 3350, plus 0.05M sodium fluoride as an additive, and protein solution at 4.9 absorption units at lambda=280nm yielded a single large well-shaped monocrystal after several months. This crystal could not be reproduced despite extensive trials. |
Crystal Properties | |
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Matthews coefficient | Solvent content |
3.67 | 66.47 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 130.8 | α = 90 |
b = 260.3 | β = 90 |
c = 281.8 | γ = 90 |
Symmetry | |
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Space Group | P 21 21 21 |
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 | CCD | ADSC QUANTUM 315r | 2008-07-18 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | ESRF BEAMLINE ID23-1 | 1.000 | ESRF | ID23-1 |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | Rrim I (All) | CC (Half) | 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 | 4.2 | 34.24 | 99.1 | 0.095 | 0.107 | 0.998 | 10 | 4.8 | 70358 | 198.6 |
Highest Resolution Shell | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | Rrim I (All) | CC (Half) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||
1 | 4.2 | 4.45 | 96.8 | 1.62 | 1.865 | 0.446 | 1 |
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 | 4ACQ | 4.2 | 34.24 | 70253 | 831 | 99.2 | 0.236 | 0.235 | 0.282 | RANDOM | 256.78 |
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] | |
-2.3859 | -40.4686 | 42.8544 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
t_other_torsion | 20.18 |
t_omega_torsion | 3.12 |
t_angle_deg | 1.25 |
t_bond_d | 0.011 |
t_dihedral_angle_d | |
t_trig_c_planes | |
t_gen_planes | |
t_it | |
t_nbd | |
t_improper_torsion |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 40822 |
Nucleic Acid Atoms | |
Solvent Atoms | |
Heterogen Atoms | 812 |
Software
Software | |
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Software Name | Purpose |
BUSTER | refinement |
XSCALE | data scaling |
PDB_EXTRACT | data extraction |
XDS | data reduction |
BUSTER | phasing |