ELECTRON MICROSCOPY


Sample

Ternary complex of alpha-beta tubulin with synthetic (R1x4) tau

Specimen Preperation
Sample Aggregation State FILAMENT
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details blot force 10 pN, 6 second blot time. used C-flat 1.2/1.3 holey grids. First 2 uL of microtubules were adhered to grid for 30 seconds, followed by 2 4 uL washes of tau with 30 second incubation for each wash
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles 40522
Reported Resolution (Å) 3.2
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 FLEXIBLE FIT
Refinement Target real space correlation
Overall B Value 120
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 45
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1000
Maximum Defocus (nm) 2500
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 35714
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION Appion ?
IMAGE ACQUISITION SerialEM ?
CTF CORRECTION CTFFIND 4
MODEL FITTING Rosetta ?
INITIAL EULER ASSIGNMENT EMAN2 ?
FINAL EULER ASSIGNMENT FREALIGN 9.09
RECONSTRUCTION FREALIGN 9.09
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING ONLY ?