6PKK
MicroED structure of proteinase K from an uncoated, single lamella at 2.18A resolution (#5)
ELECTRON CRYSTALLOGRAPHY
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 6CL7 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 67.57 | α = 90 |
b = 67.57 | β = 90 |
c = 105.72 | γ = 90 |
Symmetry | |
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Space Group | P 43 21 2 |
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 | R-Free Selection Details | Mean Isotropic B | ||||||
ELECTRON CRYSTALLOGRAPHY | THROUGHOUT | 2.176 | 41.634 | 1.33 | 13203 | 1477 | 94.46 | 0.2258 | 0.2231 | 0.2649 | copied from 6cl7 |
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 | |
---|---|
Key | Refinement Restraint Deviation |
f_dihedral_angle_d | 2.682 |
f_angle_d | 0.583 |
f_chiral_restr | 0.04 |
f_bond_d | 0.004 |
f_plane_restr | 0.004 |
Software
Software | |
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Software Name | Purpose |
PHENIX | refinement |
Sample |
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Proteinase K |
Specimen Preparation | |
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Sample Aggregation State | 3D ARRAY |
Vitrification Instrument | FEI VITROBOT MARK IV |
Cryogen Name | ETHANE |
Sample Vitrification Details |
3D Reconstruction | |
---|---|
Reconstruction Method | CRYSTALLOGRAPHY |
Number of Particles | |
Reported Resolution (Å) | 2.176 |
Resolution Method | DIFFRACTION PATTERN/LAYERLINES |
Other Details | |
Refinement Type | |
Symmetry Type | 3D CRYSTAL |
Space Group Name | |
Length a | 67.6 |
Length b | 67.6 |
Length c | 67.6 |
Angle Alpha | 90 |
Angle Beta | 90 |
Angle Gamma | 90 |
Map-Model Fitting and Refinement | |||||
---|---|---|---|---|---|
Id | 1 (6CL7) | ||||
Refinement Space | RECIPROCAL | ||||
Refinement Protocol | RIGID BODY FIT | ||||
Refinement Target | |||||
Overall B Value | 31.74 | ||||
Fitting Procedure | |||||
Details |
Data Acquisition | |||||||||
---|---|---|---|---|---|---|---|---|---|
Detector Type | FEI CETA (4k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 0.03 |
Imaging Experiment | 1 |
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Date of Experiment | |
Temperature (Kelvin) | |
Microscope Model | FEI TALOS ARCTICA |
Minimum Defocus (nm) | |
Maximum Defocus (nm) | |
Minimum Tilt Angle (degrees) | |
Maximum Tilt Angle (degrees) | |
Nominal CS | |
Imaging Mode | DIFFRACTION |
Specimen Holder Model | FEI TITAN KRIOS AUTOGRID HOLDER |
Nominal Magnification | |
Calibrated Magnification | |
Source | FIELD EMISSION GUN |
Acceleration Voltage (kV) | 200 |
Imaging Details |
EM Software | ||
---|---|---|
Task | Software Package | Version |
MODEL FITTING | PHENIX | 1.15 |
MOLECULAR REPLACEMENT | PHENIX | 2.8.2 |
RECONSTRUCTION | PHENIX | 1.15.2 |
MODEL REFINEMENT | PHENIX | 1.15 |
Image Processing | ||||
---|---|---|---|---|
CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
NONE | NONE |