Local refinement structure of the two interacting N-domains of full-length, dimeric, soluble somatic angiotensin I-converting enzyme
ELECTRON MICROSCOPY
Refinement
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| f_dihedral_angle_d | 13.2209 |
| f_angle_d | 0.8684 |
| f_chiral_restr | 0.0469 |
| f_plane_restr | 0.0136 |
| f_bond_d | 0.0069 |
| Sample |
|---|
| Full-length, soluble, dimeric somatic angiotensin I-converting enzyme |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | Diluted protein (in buffer containing zinc chloride and sodium chloride) was incubated on ice for 30 minutes after which it was applied to the grid, i ... |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 215632 |
| Reported Resolution (Å) | 3.78 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | Local refinement (C1) with a mask around the two interacting N-domains following C-domain particle subtraction in RELION and C2 symmetry expansion in ... |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | Correlation coefficient | ||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | |||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K3 (6k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 43 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | FEI TITAN KRIOS |
| Minimum Defocus (nm) | 1800 |
| Maximum Defocus (nm) | 3000 |
| 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 | 81000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | Topaz | 0.2.5 |
| IMAGE ACQUISITION | EPU | |
| CTF CORRECTION | cryoSPARC | 3.2 |
| MODEL FITTING | ISOLDE | 1.2.0 |
| MODEL REFINEMENT | PHENIX | 1.19.2 |
| INITIAL EULER ASSIGNMENT | cryoSPARC | 3.2 |
| FINAL EULER ASSIGNMENT | cryoSPARC | 3.2 |
| CLASSIFICATION | cryoSPARC | 3.2 |
| RECONSTRUCTION | cryoSPARC | 3.2 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | cryoSPARC patch-based CTF estimation | 1727045 | Topaz-denoising was performed on all curated micrographs, a Topaz model trained on this dataset, and used for picking | |
