2QTO
An anisotropic model for potassium channel KcsA
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 1BL8 |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | 7.5 | 200 MM CACL2, 100 MM HEPES PH 7.5, 48% PEG 400 |
Crystal Properties | |
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Matthews coefficient | Solvent content |
4.99 | 75.34 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 128.78 | α = 90 |
b = 68.93 | β = 124.63 |
c = 112.04 | γ = 90 |
Symmetry | |
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Space Group | C 1 2 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 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | CHESS BEAMLINE A1 | 0.908 | CHESS | A1 |
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 | 3.201 | 30 | 93.3 | 6.1 | 12603 | 2 |
Refinement
Statistics | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | Resolution (High) | Resolution (Low) | Cut-off Sigma (F) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (Observed) | R-Work (Depositor) | R-Free (Depositor) | R-Free Selection Details | Mean Isotropic B | |||||
X-RAY DIFFRACTION | MIR | THROUGHOUT | 1BL8 | 3.201 | 9.99 | 4 | 10912 | 1265 | 100 | 0.27164 | 0.27162 | 0.27181 | RANDOM | 121.433 |
Temperature Factor Modeling | ||||||
---|---|---|---|---|---|---|
Anisotropic B[1][1] | Anisotropic B[1][3] | Anisotropic B[2][2] | Anisotropic B[3][3] | |||
-1.06 | -1.64 | 0.68 | -1.49 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 47.921 |
r_dihedral_angle_3_deg | 20.4 |
r_dihedral_angle_4_deg | 8.627 |
r_dihedral_angle_1_deg | 5.493 |
r_angle_refined_deg | 0.989 |
r_symmetry_vdw_refined | 0.469 |
r_nbtor_refined | 0.31 |
r_nbd_refined | 0.285 |
r_xyhbond_nbd_refined | 0.173 |
r_metal_ion_refined | 0.108 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 2849 |
Nucleic Acid Atoms | |
Solvent Atoms | 1 |
Heterogen Atoms | 3 |
Software
Software | |
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Software Name | Purpose |
REFMAC | refinement |
DENZO | data reduction |
SCALEPACK | data scaling |
SHELXS | phasing |