Cryo-EM structure of violaxanthin-chlorophyll-a-binding protein with red shifted Chl a (rVCP) from Trachydiscus minutus at 2.4 angstrom
ELECTRON MICROSCOPY
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 1RWT | |
Refinement
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| f_dihedral_angle_d | 10.98 |
| f_angle_d | 1.176 |
| f_chiral_restr | 0.058 |
| f_bond_d | 0.011 |
| f_plane_restr | 0.007 |
| Sample |
|---|
| Tetrameric light-harvesting complex from Trachydiscus minutus. |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 290174 |
| Reported Resolution (Å) | 2.42 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C2 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (1RWT) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | AB INITIO MODEL | ||||
| Refinement Target | |||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | |||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K3 (6k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 80 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | JEOL CRYO ARM 300 |
| Minimum Defocus (nm) | 700 |
| Maximum Defocus (nm) | 2200 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | 2.7 |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | JEOL CRYOSPECPORTER |
| Nominal Magnification | 60000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | cryoSPARC | 4.2.1 |
| IMAGE ACQUISITION | SerialEM | 4.1.0beta |
| CTF CORRECTION | cryoSPARC | 4.2.1 |
| MODEL FITTING | UCSF Chimera | 1.17.1 |
| MODEL REFINEMENT | Coot | 0.9.4.1 |
| MODEL REFINEMENT | PHENIX | 1.19.2 |
| INITIAL EULER ASSIGNMENT | cryoSPARC | 4.2.1 |
| FINAL EULER ASSIGNMENT | cryoSPARC | 4.2.1 |
| RECONSTRUCTION | cryoSPARC | 4.2.1 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | 6610197 | |||
