ELECTRON MICROSCOPY

Sample

SrpI encapsulin holo complex

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details blot force 5, 3 sec blot, 100 humidity, 4C, 1 sec drain time
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 11980
Reported Resolution (Å) 2.2
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 RIGID BODY FIT
Refinement Target Correlation coefficient
Overall B Value 20
Fitting Procedure ?
Details One subunit was built completely de novo based on sequence/density, and iteratively real space refined with neighboring subunits using PHENIX.
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 35
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1000
Maximum Defocus (nm) 2800
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.6
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification 64000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details Residual beam tilt corrected in RELION/3.1. CTF refinement performed in RELION/3.1.
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION RELION 3.1
IMAGE ACQUISITION SerialEM ?
CTF CORRECTION CTFFIND 4.1.10
MODEL FITTING PHENIX dev-2883
INITIAL EULER ASSIGNMENT RELION 3.1
FINAL EULER ASSIGNMENT RELION 3.1
RECONSTRUCTION RELION 3.1
MODEL REFINEMENT PHENIX dev-2883
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION CTF refinement was performed in Relion/3.1