ELECTRON MICROSCOPY

Sample

13pf wildtype microtubule from recombinant human tubulin and decorated with kinesin

Specimen Preperation
Sample Aggregation State HELICAL ARRAY
Vitrification Instrument ?
Cryogen Name ETHANE-PROPANE
Sample Vitrification Details 30 second adsorption time onto grid. blot force 15, 4 second blot time, 37 degrees, and 100 percent humidity. 0.5 second drain time.
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles 23364
Reported Resolution (Å) 3.6
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 RIGID BODY FIT
Refinement Target Correlation Coefficient
Overall B Value 115
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 40
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 700
Maximum Defocus (nm) 2400
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 ?
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION SerialEM ?
CTF CORRECTION CTFFIND 4
CTF CORRECTION RELION 3.1
MODEL FITTING PHENIX dev-2883
MODEL REFINEMENT PHENIX dev-2883
INITIAL EULER ASSIGNMENT RELION 3.1
FINAL EULER ASSIGNMENT FREALIGN 9.11
CLASSIFICATION RELION 3.1
RECONSTRUCTION FREALIGN 9.11
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION CTFFind4 and CTFRefine were used within the RELION3.1 framework.
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