6EO1
The electron crystallography structure of the cAMP-bound potassium channel MloK1 (PCO-refined)
ELECTRON CRYSTALLOGRAPHY
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 4CHV |
Crystal Data
Unit Cell | |
---|---|
Length ( Å ) | Angle ( ˚ ) |
a = 252.45 | α = 90 |
b = 252.45 | β = 90 |
c = 209 | γ = 90 |
Symmetry | |
---|---|
Space Group | P 1 |
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-Work | R-Free | Mean Isotropic B | |||||||||
ELECTRON CRYSTALLOGRAPHY | NONE | 4.5 | 6 | 23102 | 100 |
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] | |
RMS Deviations | |
---|---|
Key | Refinement Restraint Deviation |
f_dihedral_angle_d | 10.049 |
f_angle_d | 0.934 |
f_chiral_restr | 0.047 |
f_bond_d | 0.013 |
f_plane_restr | 0.007 |
Software
Software | |
---|---|
Software Name | Purpose |
PHENIX | refinement |
Sample |
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MloK1 tetramer |
Specimen Preparation | |
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Sample Aggregation State | 2D ARRAY |
Vitrification Instrument | FEI VITROBOT MARK IV |
Cryogen Name | ETHANE |
Sample Vitrification Details | 3.5 second-blotting |
3D Reconstruction | |
---|---|
Reconstruction Method | CRYSTALLOGRAPHY |
Number of Particles | |
Reported Resolution (Å) | 4.5 |
Resolution Method | OTHER |
Other Details | |
Refinement Type | |
Symmetry Type | 2D CRYSTAL |
Space Group Name | P 4 21 2 |
Length a | 135 |
Length b | 135 |
Angle Gamma | 90 |
Map-Model Fitting and Refinement | |||||
---|---|---|---|---|---|
Id | 1 (4CHV) | ||||
Refinement Space | REAL | ||||
Refinement Protocol | FLEXIBLE FIT | ||||
Refinement Target | fit energy | ||||
Overall B Value | |||||
Fitting Procedure | |||||
Details | The initial model was obtained using Modeller (Sali and Blundell, 1993); in particular, the missing fragments were generated for the previously publis ... |
Data Acquisition | |||||||||
---|---|---|---|---|---|---|---|---|---|
Detector Type | GATAN K2 SUMMIT (4k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 45 |
Imaging Experiment | 1 |
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Date of Experiment | |
Temperature (Kelvin) | |
Microscope Model | FEI TITAN KRIOS |
Minimum Defocus (nm) | 750 |
Maximum Defocus (nm) | 4300 |
Minimum Tilt Angle (degrees) | |
Maximum Tilt Angle (degrees) | |
Nominal CS | 2.7 |
Imaging Mode | BRIGHT FIELD |
Specimen Holder Model | FEI TITAN KRIOS AUTOGRID HOLDER |
Nominal Magnification | 50000 |
Calibrated Magnification | |
Source | FIELD EMISSION GUN |
Acceleration Voltage (kV) | 300 |
Imaging Details | pixel size 1.3 A/pix |
EM Software | ||
---|---|---|
Task | Software Package | Version |
IMAGE ACQUISITION | FOCUS | 1.0 |
MODEL FITTING | Rosetta | |
MODEL REFINEMENT | PHENIX | |
Image Processing | ||||
---|---|---|---|---|
CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
PHASE FLIPPING AND AMPLITUDE CORRECTION |