ELECTRON MICROSCOPY

Sample

Ternary complex of Taxol-stabilized microtubule lattice, alpha-tubulin, and beta-tubulin

Specimen Preperation
Sample Aggregation State HELICAL ARRAY
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details Blot for 4 seconds, blot force 10, before plunging into liquid ethane (FEI VITROBOT MARK IV).
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles 17069
Reported Resolution (Å) 3.5
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 correlation coefficient
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 8
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN
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 GATAN 626 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER
Nominal Magnification 27500
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION Leginon 3.2
IMAGE ACQUISITION Appion 3.2
CTF CORRECTION CTFFIND 4
MODEL FITTING UCSF Chimera 1.10
MODEL REFINEMENT Rosetta 3.6
MODEL REFINEMENT REFMAC 5.5
INITIAL EULER ASSIGNMENT EMAN2 2.07
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 AND AMPLITUDE CORRECTION ?