1Q6F
Crystal Structure of Soybean Beta-Amylase Mutant (E178Y) with Increased pH Optimum at pH 7.1
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
---|---|---|---|---|
ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 7.1 | 277 | ammonium sulfate, pH 7.1, VAPOR DIFFUSION, HANGING DROP, temperature 277K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.63 | 52.9 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 86.818 | α = 90 |
b = 86.818 | β = 90 |
c = 145.24 | γ = 120 |
Symmetry | |
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Space Group | P 31 2 1 |
Diffraction
Diffraction Experiment | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
1 | 1 | x-ray | 293 | AREA DETECTOR | SIEMENS HI-STAR | 1999-01-31 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | ROTATING ANODE | MACSCIENCE | 1.5418 |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Sym 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 | 1.99 | 40.65 | 89.4 | 0.084 | 44346 | 39656 | 1 | 8.2 |
Highest Resolution Shell | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | ||||||||||||
1.99 | 2.06 | 55.9 |
Refinement
Statistics | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Diffraction ID | Structure Solution Method | Cross Validation method | 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 | 2.1 | 15 | 30486 | 3050 | 81.1 | 0.171 | 0.171 | 0.208 | RANDOM | 21.3 |
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] | |
2.26 | 4.64 | 2.26 | -4.51 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
c_dihedral_angle_d | 22.6 |
c_scangle_it | 3.1 |
c_scbond_it | 2.19 |
c_mcangle_it | 1.82 |
c_angle_deg | 1.3 |
c_mcbond_it | 1.21 |
c_improper_angle_d | 0.81 |
c_bond_d | 0.006 |
c_bond_d_na | |
c_bond_d_prot |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 3950 |
Nucleic Acid Atoms | |
Solvent Atoms | 247 |
Heterogen Atoms | 91 |
Software
Software | |
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Software Name | Purpose |
CNS | refinement |
SAINT | data reduction |
SAINT | data scaling |
CNS | phasing |