5VLO
The structure of human CamKII with bound inhibitor
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 293 | CamKII S3-K301, in 20mM imidazole pH 8.5, 0.3M sodium chloride, 5mM TCEP, was concentrated to 36 mg/ml and flash frozen in liquid nitrogen for long term storage at -80 C in 10 uL aliquots. The protein was thawed and diluted down to 12 mg/mL in the same buffer just prior to crystallization experiments. Sitting drop vapor diffusion droplets were assembled with 250 nL of 12 mg/mL CamKII, 0.6 mM inhibitor and 250 nL of reservoir solution 24% peg 3350, 0.2 M ammonium tartrate, 0.1 M arginine. Flat crystal plates (typically 0.03 mm x 0.2 mm x 0.4 mm in size) grew in 4-7 days at 20 C. A crystal seed suspension was prepared with ten crushed crystals combined into 100 uL of reservoir solution and stored at -80 C. A thirty fold seed dilution was prepared in the same solution for addition to protein droplets in a 1 to 1 volume ratio to enhance crystallization of difficult to crystallize inhibitors. |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.35 | 47.64 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 54.473 | α = 90 |
b = 67.546 | β = 94.111 |
c = 85.45 | γ = 90 |
Symmetry | |
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Space Group | P 1 21 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 PILATUS3 6M | 2016-02-25 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | ALS BEAMLINE 5.0.2 | 1.0 | ALS | 5.0.2 |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | CC (Half) | 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 | 2.05 | 50 | 98.5 | 0.998 | 12.7 | 13 | 38959 | 34.660655594 |
Highest Resolution Shell | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | CC (Half) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||||
1 | 2.05 | 2.17 | 91 | 0.742 | 1.63 | 12.7 |
Refinement
Statistics | |||||||||||||||||||
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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 | Mean Isotropic B | |||||||
X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | FREE R-VALUE | 2.05 | 47.38 | 1.33 | 38959 | 1453 | 99.9692078725 | 0.1837 | 0.1828 | 0.2261 | 41.0908881426 |
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] | |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
f_dihedral_angle_d | 18.7907826226 |
f_angle_d | 0.517926131239 |
f_chiral_restr | 0.0412273122249 |
f_plane_restr | 0.00435645601269 |
f_bond_d | 0.00273610093055 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 4694 |
Nucleic Acid Atoms | |
Solvent Atoms | 349 |
Heterogen Atoms | 94 |
Software
Software | |
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Software Name | Purpose |
XDS | data reduction |
XSCALE | data scaling |
EPMR | phasing |
PHENIX | refinement |