Cryo-EM structure of the poly(4-styrenesulfonic acid-co-maleic acid) [PSCMA]-extractable amyloid-beta 42 oligomer from human brain tissue (Conformation 2)
ELECTRON MICROSCOPY
Refinement
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| f_dihedral_angle_d | 4.709 |
| f_angle_d | 0.464 |
| f_chiral_restr | 0.062 |
| f_bond_d | 0.004 |
| f_plane_restr | 0.001 |
| Sample |
|---|
| Human Amyloid-Beta Peptide (1-42) Filaments |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | FILAMENT |
| Vitrification Instrument | |
| Cryogen Name | NITROGEN |
| Sample Vitrification Details | |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | HELICAL |
| Number of Particles | 52021 |
| Reported Resolution (Å) | 3.1 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | |
| Refinement Type | |
| Symmetry Type | HELICAL |
| Axial Symmetry | C1 |
| Axial Rise | 2.36 |
| Angular Rotation | 178.5 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | OTHER | ||||
| Refinement Target | |||||
| Overall B Value | 91.68 | ||||
| Fitting Procedure | |||||
| Details | |||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K3 (6k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 41 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | FEI TITAN KRIOS |
| Minimum Defocus (nm) | 1250 |
| Maximum Defocus (nm) | 2500 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | 2.7 |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | |
| Nominal Magnification | 81000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | RELION | 4.0 |
| IMAGE ACQUISITION | SerialEM | |
| CTF CORRECTION | CTFFIND | 4.1 |
| MODEL FITTING | UCSF Chimera | 1.12 |
| MODEL FITTING | Coot | 0.8.9.1 |
| INITIAL EULER ASSIGNMENT | RELION | 4.0 |
| FINAL EULER ASSIGNMENT | RELION | 4.0 |
| CLASSIFICATION | RELION | 4.0 |
| RECONSTRUCTION | RELION | 4.0 |
| MODEL REFINEMENT | PHENIX | 1.20.1-4487 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | 247940 | |||
