Find PDB structures and Computed Structure Models (CSM) by combining queries from tools in this suite: Attribute Search, Sequence Similarity, Sequence Motif, 3D Similarity, and 3D Motif with 'AND' logic.
BK proteoliposomes were applied onto a glow-discharged perforated carbon grid (CFlat R2/2, EMS), and incubated for 5-10 min In an FEI Vitrobot Mark IV ...
BK proteoliposomes were applied onto a glow-discharged perforated carbon grid (CFlat R2/2, EMS), and incubated for 5-10 min In an FEI Vitrobot Mark IV (FEI). After incubation, the sample was blotted from the side and buffer containing 10 mM HEPES, pH 7.3, 75 mM KCl, and 1 mM EDTA was applied onto the TEM grid to further swell proteoliposomes. Then grids were blotted for 7 s with force 0 and fast frozen in liquid ethane cooled by liquid nitrogen.
3D Reconstruction
Reconstruction Method
SINGLE PARTICLE
Number of Particles
122456
Reported Resolution (Å)
3.5
Resolution Method
FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type
POINT
Point Symmetry
C2
Map-Model Fitting and Refinement
Id
1
Refinement Space
REAL
Refinement Protocol
FLEXIBLE FIT
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector Type
GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)
60
Imaging Experiment
1
Date of Experiment
Temperature (Kelvin)
Microscope Model
FEI TITAN KRIOS
Minimum Defocus (nm)
852
Maximum Defocus (nm)
4000
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
130000
Calibrated Magnification
Source
FIELD EMISSION GUN
Acceleration Voltage (kV)
300
Imaging Details
The Coma free alignment was performed using Auto-CTF software from FEI.
EM Software
Task
Software Package
Version
PARTICLE SELECTION
RELION
2.1
PARTICLE SELECTION
MATLAB
R2018a
IMAGE ACQUISITION
Leginon
3.3
CTF CORRECTION
CTFFIND
4
CTF CORRECTION
Gctf
INITIAL EULER ASSIGNMENT
RELION
2.1
FINAL EULER ASSIGNMENT
RELION
2.1
CLASSIFICATION
RELION
2.1
RECONSTRUCTION
RELION
2.1
Image Processing
CTF Correction Type
CTF Correction Details
Number of Particles Selected
Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION
CTF full correction was performed following RELION 3D reconstruction
275295
Approximately 4,800 particles from 350 micrographs were interactively selected and classified using RELION. Ten representative classes were selected as the templates for automated particle picking using RELION. The automated picked particles were screened using homemade MATLAB (MathWorks) programs to exclude particles more than 80 A away from any liposome, which resulted in 275,295 particles from 2,786 micrographs.