ELECTRON MICROSCOPY

Sample

Amyloid fibril form 1a of Tau-PAM4 peptide adducted with the Fmoc protection group

Specimen Preperation
Sample Aggregation State FILAMENT
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details ?
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles 11255
Reported Resolution (Å) 2.8
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type HELICAL
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol AB INITIO MODEL
Refinement Target Cross-correlation coefficient
Overall B Value 48
Fitting Procedure ?
Details Initial model built manually in coot, no starting template
Data Acquisition
Detector Type FEI FALCON IV (4k x 4k)
Electron Dose (electrons/Å2) 32
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1200
Maximum Defocus (nm) 2400
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 130000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION crYOLO 1.8
IMAGE ACQUISITION EPU 3.0
CTF CORRECTION CTFFIND 4.14
MODEL FITTING Coot 0.8.9
INITIAL EULER ASSIGNMENT RELION 4.0
FINAL EULER ASSIGNMENT RELION 4.0
CLASSIFICATION RELION 4.0
RECONSTRUCTION RELION 4.0
MODEL REFINEMENT PHENIX 1.17.1:
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?