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Undecorated 13pf E254N microtubule from recombinant human tubulin
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 6DPU
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 14.451 f_angle_d 0.545 f_chiral_restr 0.042 f_bond_d 0.004 f_plane_restr 0.004
Sample Undecorated 13pf E254N microtubule from recombinant human tubulin
Specimen Preparation Sample Aggregation State HELICAL ARRAY Vitrification Instrument Cryogen Name ETHANE-PROPANE Sample Vitrification Details
3D Reconstruction Reconstruction Method HELICAL Number of Particles 13706 Reported Resolution (Å) 3.8 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type HELICAL Axial Symmetry C1 Axial Rise 0.13 Angular Rotation 83.45
Map-Model Fitting and Refinement Id 1 (6DPU) Refinement Space REAL Refinement Protocol RIGID BODY FIT Refinement Target Correlation Coefficient Overall B Value 120 Fitting Procedure Details
Data Acquisition Detector Type GATAN K3 BIOQUANTUM (6k x 4k) Electron Dose (electrons/Å**2) 40
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1000 Maximum Defocus (nm) 2700 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
EM Software Task Software Package Version IMAGE ACQUISITION SerialEM CTF CORRECTION CTFFIND 4 CTF CORRECTION RELION 3.1 MODEL FITTING PHENIX dev-2883 INITIAL EULER ASSIGNMENT RELION 3.1 FINAL EULER ASSIGNMENT FREALIGN 9.11 CLASSIFICATION RELION 3.1 RECONSTRUCTION FREALIGN 9.11 MODEL REFINEMENT PHENIX dev-2883
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. Microtubules were picked within RELION 3.1 helical picking functionality and extracted along the filament with an 82A sliding box.