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Cryo-EM map of protofilament of microtubule doublet
Sample Protofilament from ciliary microtubule doublet
Specimen Preparation Sample Aggregation State FILAMENT Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details Blot force 3 for 5 seconds
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 23 Reported Resolution (Å) 4.6 Resolution Method FSC 0.143 CUT-OFF Other Details 23 boxes of the protofilament are boxed out from the doublet map (EMD-8528), aligned and averaged using subtomogram averaging software. Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 Refinement Space REAL Refinement Protocol BACKBONE TRACE Refinement Target minimization global Overall B Value Fitting Procedure Details
Data Acquisition Detector Type FEI FALCON II (4k x 4k) Electron Dose (electrons/Å**2) 45
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1200 Maximum Defocus (nm) 3800 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 59000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION E2helixboxer 2 IMAGE ACQUISITION EPU 1.6 CTF CORRECTION CTFFIND4 MODEL FITTING UCSF Chimera MODEL REFINEMENT PHENIX INITIAL EULER ASSIGNMENT MATLAB FINAL EULER ASSIGNMENT AV3 RECONSTRUCTION AV3
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 127428