7B2M
Cryo-EM structure of complement C4b in complex with nanobody E3
ELECTRON MICROSCOPY
Refinement
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| f_dihedral_angle_d | 19.514 |
| f_angle_d | 0.459 |
| f_chiral_restr | 0.042 |
| f_bond_d | 0.003 |
| f_plane_restr | 0.003 |
| Sample |
|---|
| Complement C4b bound to nanobody E3 |
| Sample Components |
| Complement C4 beta chain |
| Complement C4 alpha chain |
| Complement C4 gamma chain |
| Nanobody E3 |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | blot 4.5 seconds, force 1 |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 176318 |
| Reported Resolution (Å) | 3.39 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | performed in RELION |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (5JTW, 5JTW, 5JTW) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | |||||
| Refinement Target | Map to model FSC | ||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | Model was refined in the local-resolution filtered Relion map using Phenix real space refine. | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K2 SUMMIT (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 51.7 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | FEI TALOS ARCTICA |
| Minimum Defocus (nm) | 800 |
| 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 | 130000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 200 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | RELION | 3.1 |
| IMAGE ACQUISITION | EPU | |
| CTF CORRECTION | Gctf | 1.18 |
| MODEL FITTING | UCSF Chimera | 1.12 |
| INITIAL EULER ASSIGNMENT | RELION | 3.1 |
| FINAL EULER ASSIGNMENT | RELION | 3.1 |
| CLASSIFICATION | RELION | 3.1 |
| RECONSTRUCTION | RELION | 3.1 |
| MODEL REFINEMENT | PHENIX | 1.18.2-3874 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | 617600 | |||
