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Brain-derived 42-residue amyloid-beta fibril type B
Sample amyloid-b 42 (Ab42) fibril
Specimen Preparation Sample Aggregation State FILAMENT Vitrification Instrument FEI VITROBOT MARK I Cryogen Name ETHANE Sample Vitrification Details Preblot for 12-13 seconds and blot for 2.5-3.0 seconds before plunging
3D Reconstruction Reconstruction Method HELICAL Number of Particles 92019 Reported Resolution (Å) 2.76 Resolution Method FSC 0.143 CUT-OFF Other Details 3D refinement and post-processing were performed with 21 (screw) symmetry Refinement Type Symmetry Type HELICAL Axial Symmetry C1 Axial Rise 2.48 Angular Rotation 179.36
Map-Model Fitting and Refinement Id 1 Refinement Space Refinement Protocol OTHER Refinement Target Overall B Value Fitting Procedure Details Manually generated model was fit into the density using PHENIX and UCSF Chimera. Further refinements were performed using Xplor-NIH.
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) Electron Dose (electrons/Å**2) 50.34
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 500 Maximum Defocus (nm) 2500 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 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 RELION 4.0.0 CTF CORRECTION RELION 4.0.0 MODEL FITTING Coot MODEL REFINEMENT PHENIX MODEL REFINEMENT UCSF Chimera MODEL REFINEMENT X-PLOR Xplor-NIH INITIAL EULER ASSIGNMENT RELION 4.0.0 FINAL EULER ASSIGNMENT RELION 4.0.0 CLASSIFICATION RELION 4.0.0 RECONSTRUCTION RELION 4.0.0
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details NONE CTFFIND-4 285760