7ZYV
Cryo-EM structure of catalytically active Spinacia oleracea cytochrome b6f in complex with endogenous plastoquinones at 2.13 A resolution
ELECTRON MICROSCOPY
| Sample |
|---|
| Cytochrome b6f complex |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | blot time 2 s, wait time 0 s, blot force -1 |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 685979 |
| Reported Resolution (Å) | 2.13 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | Non-uniform Refinement |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C2 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (7QRM) | ||||
| Refinement Space | |||||
| Refinement Protocol | RIGID BODY FIT | ||||
| Refinement Target | |||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | |||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K3 BIOQUANTUM (6k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 40 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | TFS KRIOS |
| Minimum Defocus (nm) | 900 |
| Maximum Defocus (nm) | 2100 |
| 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 | 105000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | cryoSPARC | v3.3.1 |
| IMAGE ACQUISITION | EPU | 2.10 |
| CTF CORRECTION | cryoSPARC | v3.3.1 |
| MODEL FITTING | UCSF ChimeraX | |
| MODEL REFINEMENT | PHENIX | |
| INITIAL EULER ASSIGNMENT | cryoSPARC | v3.3.1 |
| FINAL EULER ASSIGNMENT | cryoSPARC | v3.3.1 |
| CLASSIFICATION | cryoSPARC | v3.3.1 |
| RECONSTRUCTION | cryoSPARC | v3.3.1 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | Non-uniform Refinement with iterative global CTF refinement and anisotropic magnification fitting | 42951 | given number of particles is after blob picker and 2D cleaning | |
