4R45
Racemic crystal structure of a bimolecular DNA G-quadruplex (P-1)
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 2HBN | PDB ENTRY 2HBN |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 6.6 | 285 | 1 mM DNA, 50 mM potassium cacodylate, 40 mM potassium chloride, 50 mM magnesium chloride hexahydrate, 2.5 mM spermine, 5% v/v MPD, pH 6.6, VAPOR DIFFUSION, HANGING DROP, temperature 285K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.05 | 39.94 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 27.646 | α = 104.5 |
b = 28.3 | β = 94.19 |
c = 45.719 | γ = 113.42 |
Symmetry | |
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Space Group | P -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 | 100 | PIXEL | DECTRIS PILATUS 200K | 2013-12-23 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | ROTATING ANODE | RIGAKU | 1.5418 |
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 | 1.9 | 25.02 | 94.89 | 0.0628 | 7.81 | 1.7 | 9497 | 9011 | 2 | 2 | 49.29 |
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) | |||||||||||
1 | 1.9 | 1.97 | 95.66 | 0.1227 | 2.66 | 1.5 | 909 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | Resolution (High) | Resolution (Low) | Number Reflections (All) | 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 2HBN | 1.9 | 25.02 | 9075 | 8599 | 412 | 94.75 | 0.28797 | 0.28562 | 0.34003 | RANDOM | 14.068 |
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] | |
-0.06 | -0.02 | 0.06 | 0.03 | 0.01 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_long_range_B_refined | 4.991 |
r_long_range_B_other | 4.348 |
r_angle_other_deg | 1.652 |
r_angle_refined_deg | 1.049 |
r_scangle_other | 1.02 |
r_scbond_it | 0.619 |
r_scbond_other | 0.619 |
r_chiral_restr | 0.075 |
r_gen_planes_refined | 0.014 |
r_bond_refined_d | 0.007 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | |
Nucleic Acid Atoms | 506 |
Solvent Atoms | 143 |
Heterogen Atoms | 5 |
Software
Software | |
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Software Name | Purpose |
CrystalClear | data collection |
PHASER | phasing |
REFMAC | refinement |
CrystalClear | data reduction |
CrystalClear | data scaling |