3EM2
A bimolecular anti-parallel-stranded Oxytricha nova telomeric quadruplex in complex with a 3,6-disubstituted acridine BSU-6038
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 1L1H | PDB entry 1L1H |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 7 | 285.15 | 2 microliter drops containing 5% v/v MPD, 0.50 mM DNA, 0.25 mM Ligand, 40 mM Potassium chloride, 5 mM Magnesium chloride, 4.1 mM Spermine equilibrated against 35% v/v MPD, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 285.15K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.08 | 40.86 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 55.231 | α = 90 |
b = 42.709 | β = 90 |
c = 26.844 | γ = 90 |
Symmetry | |
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Space Group | P 21 21 2 |
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 | 105 | IMAGE PLATE | RIGAKU RAXIS IV | mirrors | 2006-05-31 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | ROTATING ANODE | RIGAKU RU200 | 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 | 2.3 | 33.79 | 97 | 0.057 | 17.9 | 3.71 | 3093 | 3000 | 3 | 33.502 |
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) | |||||||||||
2.3 | 2.38 | 99.7 | 0.173 | 6.1 | 3.59 | 303 |
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 1L1H | 2.3 | 27.62 | 3000 | 144 | 96.96 | 0.20706 | 0.20255 | 0.29342 | RANDOM | 16.976 |
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] | |
-1.05 | -1.04 | 2.09 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_angle_refined_deg | 2.152 |
r_nbd_refined | 0.326 |
r_nbtor_refined | 0.291 |
r_symmetry_hbond_refined | 0.211 |
r_xyhbond_nbd_refined | 0.166 |
r_symmetry_vdw_refined | 0.162 |
r_metal_ion_refined | 0.091 |
r_chiral_restr | 0.057 |
r_bond_refined_d | 0.008 |
r_gen_planes_refined | 0.006 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | |
Nucleic Acid Atoms | 506 |
Solvent Atoms | 64 |
Heterogen Atoms | 40 |
Software
Software | |
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Software Name | Purpose |
CrystalClear | data collection |
PHASER | phasing |
REFMAC | refinement |
d*TREK | data reduction |
d*TREK | data scaling |