5U5T
Crystal structure of EED in complex with H3K27Me3 peptide and 3-(benzo[d][1,3]dioxol-4-ylmethyl)piperidine-1-carboximidamide
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 291 | Using a PEG/salt combination as a precipitant. Briefly, EED was incubated with 10 mM B-nicotinamide adenine dinucleotide hydrate, 2 mM of a tightly binding proprietary compound, and 0.5 mM of a synthesized peptide which comprises the helix on EZH2 which interacts with EED. The crystals were grown using the vapor diffusion method. One uL of the protein mixture was combined with 1 uL of a precipitant comprised of 20% (w/v) PEG3350, 0.2 M potassium iodide, and 0.1M Tris-HCl, pH 8.5, on a cover slip which was suspended over a reservoir comprised of 0.5 mL of precipitant at 18 Celsius and sealed. The crystals grew in 4-6 days at 18 Celsius and then harvested and soaked in defined drops consisting of 30 uL of precipitant and 2 mM of compound for 24 h. Crystals were cryopreserved for data collection using a cryosolution consisting of 30% PEG 400 (v/v), 20% (w/v) PEG 3350, 0.2 M potassium iodide, and 0.1M Tris-HCl, pH 8.5 |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.25 | 45.42 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 92.81 | α = 90 |
b = 177.909 | β = 90 |
c = 50.34 | 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 | 270 | PIXEL | DECTRIS PILATUS 300K | 2013-02-22 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | APS BEAMLINE 17-ID | 0.9200 | APS | 17-ID |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (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 | 1.6 | 82.29 | 97.2 | 8 | 5.8 | 110710 | 20.73 |
Refinement
Statistics | |||||||||||||||||||
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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 | THROUGHOUT | 1.6 | 64.22 | 110614 | 5503 | 99.8 | 0.17 | 0.168 | 0.2 | RANDOM | 28.38 |
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] | |
-5.4252 | 3.2454 | 2.1798 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
t_other_torsion | 15.3 |
t_omega_torsion | 4.04 |
t_angle_deg | 1.06 |
t_bond_d | 0.01 |
t_dihedral_angle_d | |
t_incorr_chiral_ct | |
t_pseud_angle | |
t_trig_c_planes | |
t_gen_planes | |
t_it |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 6064 |
Nucleic Acid Atoms | |
Solvent Atoms | 1033 |
Heterogen Atoms | 40 |
Software
Software | |
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Software Name | Purpose |
BUSTER | refinement |
XDS | data reduction |
SCALA | data scaling |
AMoRE | phasing |