Joint X-ray/neutron structure of human carbonic anhydrase II at pH 7.8
NEUTRON DIFFRACTION - X-RAY DIFFRACTION
Crystallization
Crystalization Experiments |
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ID | Method | pH | Temperature | Details |
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1 | VAPOR DIFFUSION, SITTING DROP | 7.8 | 293 | 1.3 M sodium citrate, 100 mM Tris, pH 7.8, VAPOR DIFFUSION, SITTING DROP, temperature 293K |
Crystal Properties |
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Matthews coefficient | Solvent content |
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2.17 | 43.26 |
Crystal Data
Unit Cell |
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Length ( Å ) | Angle ( ˚ ) |
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a = 42.83 | α = 90 |
b = 41.7 | β = 104.58 |
c = 72.92 | γ = 90 |
Symmetry |
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Space Group | P 1 21 1 |
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Diffraction
Diffraction Experiment |
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ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol |
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1 | 1 | neutron | 293 | AREA DETECTOR | PCS neutron detector | | 2010-08-01 | L | LAUE |
2 | 1 | x-ray | 293 | IMAGE PLATE | RIGAKU RAXIS IV++ | | 2010-06-18 | M | SINGLE WAVELENGTH |
Radiation Source |
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
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1 | NUCLEAR REACTOR | OTHER | 0.60-7.0 | | |
2 | ROTATING ANODE | RIGAKU FR-E+ DW | 1.5418 | | |
Data Collection
Overall |
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | R Sym I (Observed) | Rrim I (All) | Rpim I (All) | CC (Half) | R Split (All) | 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 |
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1 | 2 | 20 | 84.2 | | | | | | | | | 14520 | 14236 | | | |
2 | 1.65 | 35 | 92.3 | 0.035 | | | | | | 23.1 | 2.94 | 81941 | 81941 | | | |
Highest Resolution Shell |
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | R Merge I (Observed) | R-Sym I (Observed) | Rrim I (All) | Rpim I (All) | CC (Half) | R Split (All) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) |
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1 | | | | | | | | | | | | |
2 | 1.65 | 1.71 | | 0.147 | 0.147 | | | | | 4 | 1.67 | |
Refinement
Statistics |
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Diffraction ID | Structure Solution Method | Resolution (High) | Resolution (Low) | Cut-off Sigma (I) | Cut-off Sigma (F) | Number Reflections (All) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (All) | R-Factor (Observed) | R-Work | R-Free | R-Free Selection Details | Mean Isotropic B |
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NEUTRON DIFFRACTION | MOLECULAR REPLACEMENT | 2 | 20 | 2 | | 14520 | 13820 | 700 | | | | 0.2797 | 0.2938 | | |
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] |
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| | | | | |
RMS Deviations |
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Key | Refinement Restraint Deviation |
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c_bond_d | 0.983 |
c_angle_deg | 0.005 |
Non-Hydrogen Atoms Used in Refinement |
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Non-Hydrogen Atoms | Number |
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Protein Atoms | 2058 |
Nucleic Acid Atoms | |
Solvent Atoms | 191 |
Heterogen Atoms | 1 |
Software
Software |
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Software Name | Purpose |
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PCS | data collection |
nCNS | refinement |
d*TREK | data reduction |
SCALA | data scaling |
d*TREK | data scaling |
nCNS | phasing |