2JK5
Potassium Channel KcsA in complex with Tetrabutylammonium in high K
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 1K4C | PDB ENTRY 1K4C WITH SELECTIVITY FILTER AND IONS REMOVED |
Crystallization
Crystalization Experiments | ||||
---|---|---|---|---|
ID | Method | pH | Temperature | Details |
1 | 5.4 | 18-25%PEG400, 50 MM SODIUM ACETATE, 50 MM MAGNESIUM ACETATE, pH 5.4 |
Crystal Properties | |
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Matthews coefficient | Solvent content |
3.71 | 66.8 |
Crystal Data
Unit Cell | |
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Length ( ? ) | Angle ( ? ) |
a = 156.145 | ¦Á = 90 |
b = 156.145 | ¦Â = 90 |
c = 76.326 | ¦Ã = 90 |
Symmetry | |
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Space Group | I 4 |
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 | CCD | MARRESEARCH | 2007-11-19 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | APS BEAMLINE 22-ID | APS | 22-ID |
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 | 2.4 | 50 | 99.5 | 0.07 | 15.27 | 3.75 | 35756 | -3 |
Highest Resolution Shell | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | 2.4 | 2.54 | 98.9 | 0.44 | 3.5 | 3.75 |
Refinement
Statistics | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 1K4C WITH SELECTIVITY FILTER AND IONS REMOVED | 2.4 | 30 | 33912 | 1790 | 99.5 | 0.205 | 0.202 | 0.249 | RANDOM | 44.2 |
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] | |
1.08 | 1.08 | -2.17 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 35.403 |
r_dihedral_angle_4_deg | 21.808 |
r_dihedral_angle_3_deg | 15.385 |
r_dihedral_angle_1_deg | 6.007 |
r_scangle_it | 2.442 |
r_scbond_it | 1.476 |
r_angle_refined_deg | 1.291 |
r_mcangle_it | 1.175 |
r_mcbond_it | 0.638 |
r_chiral_restr | 0.085 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 4050 |
Nucleic Acid Atoms | |
Solvent Atoms | 204 |
Heterogen Atoms | 70 |
Software
Software | |
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Software Name | Purpose |
REFMAC | refinement |
XDS | data reduction |
XSCALE | data scaling |
PHASER | phasing |