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Amyloid fibril structure of islet amyloid polypeptide
Sample Amyloid fibril of the islet amyloid polypeptide (IAPP)
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 37120 Reported Resolution (Å) 4.2 Resolution Method FSC 0.143 CUT-OFF Other Details the data set was split by whole fibrils and then refined independently for 25 iterations to yield the two half maps. Refinement Type Symmetry Type HELICAL Axial Symmetry C1 Axial Rise 2.351 Angular Rotation 178.23
Map-Model Fitting and Refinement Id 1 Refinement Space REAL Refinement Protocol AB INITIO MODEL Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type FEI FALCON III (4k x 4k) Electron Dose (electrons/Å**2) 41.4
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TECNAI ARCTICA Minimum Defocus (nm) Maximum Defocus (nm) Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS Imaging Mode BRIGHT FIELD Specimen Holder Model Nominal Magnification Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 200 Imaging Details
EM Software Task Software Package Version IMAGE ACQUISITION EPU 1.5.1.50 RECONSTRUCTION RELION 3.0.5 MODEL REFINEMENT PHENIX 1.11
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details NONE