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Filament of Tau in complex with D-TLKIVWI, a D-peptide that disaggregates Alzheimer's Paired Helical Filaments, determined by Cryo-EM
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 7NRV
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 14.647 f_angle_d 0.906 f_chiral_restr 0.061 f_bond_d 0.008 f_plane_restr 0.006
Sample Tau PHF - D-TLKIVWI Complex Sample Components Tau PHF D-TLKIVWI
Specimen Preparation Sample Aggregation State FILAMENT Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details
3D Reconstruction Reconstruction Method HELICAL Number of Particles 26975 Reported Resolution (Å) 3.1 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type HELICAL Axial Symmetry C1 Axial Rise 9.65 Angular Rotation -2.2
Map-Model Fitting and Refinement Id 1 (7NRV) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type FEI FALCON IV (4k x 4k) Electron Dose (electrons/Å**2) 50
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1800 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 130000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION crYOLO IMAGE ACQUISITION SerialEM CTF CORRECTION CTFFIND MODEL FITTING PHENIX FINAL EULER ASSIGNMENT RELION 4 CLASSIFICATION RELION 4 RECONSTRUCTION RELION 4 MODEL REFINEMENT PHENIX
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 158000