2ARC
ESCHERICHIA COLI REGULATORY PROTEIN ARAC COMPLEXED WITH L-ARABINOSE
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
---|---|---|---|---|
ID | Method | pH | Temperature | Details |
1 | 7.25 | PROTEIN WAS CRYSTALLIZED BY MICROSEEDING FROM 18-20% PEG 8000, 100 MM TRIS-HCL, PH 7.25, 40 MM MAGNESIUM ACETATE AND 0.2% (W/V) L-ARABINOSE |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.28 | 46 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 39.75 | α = 90 |
b = 93.84 | β = 95.62 |
c = 50.33 | γ = 90 |
Symmetry | |
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Space Group | P 1 21 1 |
Diffraction
Diffraction Experiment | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
1 | 1 | x-ray | 100 | IMAGE PLATE | FUJI | SPHERICAL RH COATED MIRROR | 1995-09-03 | M |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | NSLS BEAMLINE X4A | NSLS | X4A |
Data Collection
Overall | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (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 | 1.5 | 30 | 94.7 | 0.047 | 0.051 | 10.9 | 5 | 58716 | 1.5 | 15.9 |
Highest Resolution Shell | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R-Sym I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||||
1.5 | 1.57 | 90.2 | 0.292 | 2.5 | 2.9 |
Refinement
Statistics | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Diffraction ID | Structure Solution Method | Cross Validation method | Resolution (High) | Resolution (Low) | Cut-off Sigma (F) | 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 | SINGLE ISOMORPHOUS REPLACEMENT | THROUGHOUT | 1.5 | 12 | 1.5 | 50892 | 5193 | 86.9 | 0.179 | 0.179 | 0.232 | RANDOM | 20.2 |
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] | |
0.1722 | 0.2994 | 0.0844 | -0.2566 |
RMS Deviations | |
---|---|
Key | Refinement Restraint Deviation |
x_dihedral_angle_d | 25.4 |
x_scangle_it | 7.12 |
x_scbond_it | 4.99 |
x_mcangle_it | 3.73 |
x_mcbond_it | 2.81 |
x_angle_deg | 1.5 |
x_improper_angle_d | 1.483 |
x_bond_d | 0.01 |
x_bond_d_na | |
x_bond_d_prot |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 2692 |
Nucleic Acid Atoms | |
Solvent Atoms | 412 |
Heterogen Atoms | 20 |
Software
Software | |
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Software Name | Purpose |
X-PLOR | model building |
X-PLOR | refinement |
DENZO | data reduction |
SCALEPACK | data scaling |
X-PLOR | phasing |