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Deacetylated Microtubules
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 3JAR
Sample Deacetylated Microtubule
Specimen Preparation Sample Aggregation State HELICAL ARRAY Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details Blotted for 4 seconds at blot force 10.
3D Reconstruction Reconstruction Method HELICAL Number of Particles 24692 Reported Resolution (Å) 4 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type HELICAL Axial Symmetry C1 Axial Rise 9.3 Angular Rotation -27.7
Map-Model Fitting and Refinement Id 1 (3JAR) Refinement Space REAL Refinement Protocol BACKBONE TRACE Refinement Target 0.5 Overall B Value 126 Fitting Procedure Details We use PHENIX to perform real space refinement and sharpen our cryoEM maps.
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) Electron Dose (electrons/Å**2) 25
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1500 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 22500 Calibrated Magnification 23364 Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details Preliminary grid screening was performed manually and all of the alignments were initially done using a gold calibration grid.
EM Software Task Software Package Version PARTICLE SELECTION Appion 2.0 IMAGE ACQUISITION SerialEM 3.7 CTF CORRECTION CTFFIND 4 MODEL FITTING PHENIX 1.14 MODEL REFINEMENT PHENIX 1.14 INITIAL EULER ASSIGNMENT EMAN 1.9 FINAL EULER ASSIGNMENT EMAN 1.9 CLASSIFICATION EMAN 1.9 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 29396 Extracted Helical Segments