ELECTRON MICROSCOPY

Sample

A two-component Family 2B encapsulin shell from Streptomyces lydicus with Encapsulin 1 enriched

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details Blot force: 20 Blot time: 4 seconds Wait time: 0 seconds
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 69590
Reported Resolution (Å) 2.58
Resolution Method FSC 0.143 CUT-OFF
Other Details Homogeneous refinement was performed against the ab-initio map with I symmetry, per-particle defocus optimization, per-group CTF parameterization, and Ewald sphere correction with negative curvature.
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target correlation coefficient
Overall B Value 99.9
Fitting Procedure ?
Details The starting encapsulin model was first placed into the map using Chimera. It was then refined against the map by alternating rounds of manual refinement in Coot and real-space refinement in PHENIX.
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 45.5
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TALOS ARCTICA
Minimum Defocus (nm) 800
Maximum Defocus (nm) 1800
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS ?
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification 45000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 200
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cryoSPARC v3.2.0+210511
IMAGE ACQUISITION Leginon ?
CTF CORRECTION cryoSPARC v3.2.0+210511
MODEL FITTING UCSF Chimera v 1.15
INITIAL EULER ASSIGNMENT cryoSPARC v3.2.0+210511
FINAL EULER ASSIGNMENT cryoSPARC v3.2.0+210511
RECONSTRUCTION cryoSPARC v3.2.0+210511
MODEL REFINEMENT Coot 0.8.9.1
MODEL REFINEMENT PHENIX 1.20.1-4487
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?