ELECTRON MICROSCOPY

Sample

Membrane-inserted form of the nonameric pore forming protein Lysenin

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument ?
Cryogen Name ETHANE
Sample Vitrification Details ?
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 29329
Reported Resolution (Å) 3.1
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol AB INITIO MODEL
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details Initial docking of C-terminal region of lysenin monomer to EM map was performed using UCSF Chimera followed by model N-terminal extension in COOT.
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 47
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1000
Maximum Defocus (nm) 4500
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 81000
Calibrated Magnification 34965
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details Direct alignments: Beam tilt pivot points, Beam shift, Comma Free. C2 aperture centering, C2 lens astigmatism correction. Objective aperture centering and objective lens astigmatism correction. Energy filter Tuning and occasional ZLP centering.
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION RELION 1.4
IMAGE ACQUISITION Titan User Interface ?
CTF CORRECTION Gctf ?
MODEL FITTING Coot 0.8.2
INITIAL EULER ASSIGNMENT RELION 1.4
FINAL EULER ASSIGNMENT RELION 1.4
CLASSIFICATION RELION 1.4
RECONSTRUCTION RELION 1.4
MODEL REFINEMENT REFMAC 5
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?
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