ELECTRON MICROSCOPY

Sample

Sorting Nexin 1

Specimen Preperation
Sample Aggregation State HELICAL ARRAY
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details blot for 3.5 seconds with bolt force 2 before plunging
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles 11677
Reported Resolution (Å) 10
Resolution Method FSC 0.143 CUT-OFF
Other Details IHRSR method were used for helical reconstruction and refinement with a range of out of plane tilt considered
Refinement Type
Symmetry Type HELICAL
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol RIGID BODY FIT
Refinement Target Correlation coefficient
Overall B Value ?
Fitting Procedure ?
Details The temperature was kept at 300K, time step was 1 fs, and secondary structure restraints was also included.
Data Acquisition
Detector Type FEI FALCON II (4k x 4k)
Electron Dose (electrons/Å2) 25
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) ?
Maximum Defocus (nm) ?
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 ?
Calibrated Magnification 59000
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION SerialEM ?
CTF CORRECTION Gctf 0.5
MODEL FITTING UCSF Chimera 1.11.2
INITIAL EULER ASSIGNMENT SPIDER 24.08
FINAL EULER ASSIGNMENT SPIDER 24.08
CLASSIFICATION MATLAB 2013
RECONSTRUCTION IHRSR ?
MODEL REFINEMENT NAMD 2.10
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION CTF was multiplied to each micrographs before tubes selection, and finally CTF amplitude correction was performed following 3D reconstruction