1ADQ
CRYSTAL STRUCTURE OF A HUMAN IGM RHEUMATOID FACTOR FAB IN COMPLEX WITH ITS AUTOANTIGEN IGG FC
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 7 | CRYSTALS WERE GROWN BY HANGING DROP VAPOR DIFFUSION. THE HANGING DROPS CONSISTED OF 2UL OF PROTEIN SOLUTION CONTAINING EACH PROTEIN AT 1MG/ML IN 0.1 % SODIUM AZIDE, 20MM TRIS-HCL AT PH 7.0, MIXED WITH AN EQUAL VOLUME OF THE RESERVOIR SOLUTION TO BE SCREENED. CRYSTALS WERE OBTAINED WITH RESERVOIR SOLUTIONS CONTAINING 17.5 - 22.5 % (W/V) POLYETHYLENE GLYCOL (MEAN MW 8000) IN 0.1 % SODIUM AZIDE, 100MM TRIS-HCL, PH 7.0, AT TEMPERATURES BETWEEN 17.5 AND 21.5 (CELSIUS)., vapor diffusion - hanging drop |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.9 | 58 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 160.35 | α = 90 |
b = 81.95 | β = 98.27 |
c = 64.24 | 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 | 278 | IMAGE PLATE | RIGAKU RAXIS II | COLLIMATOR | 1994-06-06 | M |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | ROTATING ANODE | RIGAKU RU200 |
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 | 3.15 | 15 | 98.3 | 0.113 | 5.3 | 3.1 | 14109 | 3 | 25.4 |
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) | |||||||||||
3.15 | 3.31 | 98.8 | 0.265 | 2.8 | 3.1 |
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 | PDB ENTRY 1FC1, 2IG2 | 3.15 | 8 | 11603 | 756 | 86 | 0.225 | 0.225 | 0.289 | RANDOM | 33.1 |
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] | |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
x_dihedral_angle_d | 26.47 |
x_angle_deg | 1.18 |
x_improper_angle_d | 1.06 |
x_bond_d | 0.005 |
x_bond_d_na | |
x_bond_d_prot | |
x_angle_d | |
x_angle_d_na | |
x_angle_d_prot | |
x_angle_deg_na |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 4977 |
Nucleic Acid Atoms | |
Solvent Atoms | |
Heterogen Atoms |
Software
Software | |
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Software Name | Purpose |
DENZO | data reduction |
CCP4 | data reduction |
AMoRE | phasing |
X-PLOR | refinement |
CCP4 | data scaling |