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3.3A cryo-EM map of the T. maritima encapsulin shell
Specimen Preparation
Sample Aggregation State
PARTICLE
Vitrification Instrument
FEI VITROBOT MARK IV
Cryogen Name
ETHANE-PROPANE
Sample Vitrification Details
blot force
3D Reconstruction
Reconstruction Method
SINGLE PARTICLE
Number of Particles
38952
Reported Resolution (Å)
3.3
Resolution Method
FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type
POINT
Point Symmetry
I
Map-Model Fitting and Refinement
Id
1 (3DKT)
Refinement Space
Refinement Protocol
FLEXIBLE FIT
Refinement Target
Overall B Value
38
Fitting Procedure
Details
Data Acquisition
Detector Type
GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)
40
Imaging Experiment
1
Date of Experiment
Temperature (Kelvin)
Microscope Model
FEI TITAN
Minimum Defocus (nm)
1500
Maximum Defocus (nm)
2800
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
2.7
Imaging Mode
BRIGHT FIELD
Specimen Holder Model
GATAN 626 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER
Nominal Magnification
Calibrated Magnification
Source
FIELD EMISSION GUN
Acceleration Voltage (kV)
300
Imaging Details
EM Software
Task
Software Package
Version
IMAGE ACQUISITION
Leginon
CTF CORRECTION
CTFFIND
4
MODEL FITTING
PHENIX
INITIAL EULER ASSIGNMENT
RELION
3.1
FINAL EULER ASSIGNMENT
RELION
3.1
RECONSTRUCTION
RELION
3.1
MODEL REFINEMENT
PHENIX
Image Processing
CTF Correction Type
CTF Correction Details
Number of Particles Selected
Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION
CTFFind4 implemented within RELION/3.0, CTFRefine was also performed after initial reconstruction was achieved.
86124
1000 particles were manually selected from random micrographs. 2D classification was performed on these 1000 particles, and 2D classes were used for relion auto picking