ELECTRON MICROSCOPY

Sample

14 protofilament microtubule of alpha/beta-tubulin dimers, with kinesin-5 motor domain bound 1:1 to tubulin dimers.

Specimen Preperation
Sample Aggregation State FILAMENT
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details 3.5 uM microtubules were incubated to the grid and incubated for 30 seconds. The grid was blotted, then 40 uM kinesin motor domain added and incubated for 30 seconds. The grid was again blotted and 40 uM kinesin motor domain added for 30 seconds. Then the grid was blotted and plunge frozen.
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles 73684
Reported Resolution (Å) 4.4
Resolution Method FSC 0.143 CUT-OFF
Other Details RELION 3D auto-refine
Refinement Type
Symmetry Type HELICAL
Map-Model Fitting and Refinement
ID 1
Refinement Space ?
Refinement Protocol FLEXIBLE FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 58
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI POLARA 300
Minimum Defocus (nm) ?
Maximum Defocus (nm) ?
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.0
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification ?
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION RELION ?
IMAGE ACQUISITION SerialEM ?
MODEL FITTING Flex-EM ?
INITIAL EULER ASSIGNMENT RELION ?
FINAL EULER ASSIGNMENT RELION ?
RECONSTRUCTION RELION ?
MODEL REFINEMENT Rosetta ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING ONLY ?
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