8TKQ
Cryo-EM structure of human full-length RAD52
ELECTRON MICROSCOPY
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 1KN0 | |
Refinement
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| f_dihedral_angle_d | 2.58 |
| f_angle_d | 0.574 |
| f_chiral_restr | 0.044 |
| f_bond_d | 0.007 |
| f_plane_restr | 0.003 |
| Sample |
|---|
| Human RAD52 undecameric structure |
| 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 | 623559 |
| Reported Resolution (Å) | 2.5 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C11 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (1KN0) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | Cross-correlation coefficient | ||||
| Overall B Value | 130.2 | ||||
| Fitting Procedure | |||||
| Details | Initial fitting was done in Chimera followed by refinement with Namdinator and then PHENIX alone | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K3 (6k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 50 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | TFS KRIOS |
| Minimum Defocus (nm) | 800 |
| Maximum Defocus (nm) | 2200 |
| 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 | |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details | No tilt data and tilted data (30 deg) was collected at the same time and processed together |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | cryoSPARC | 3.3.2 |
| IMAGE ACQUISITION | SerialEM | |
| CTF CORRECTION | cryoSPARC | 3.3.2 |
| MODEL FITTING | Coot | |
| INITIAL EULER ASSIGNMENT | cryoSPARC | |
| FINAL EULER ASSIGNMENT | cryoSPARC | |
| RECONSTRUCTION | cryoSPARC | 3.3.2 |
| MODEL REFINEMENT | PHENIX | |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | 2261059 | Template based picking from no tilt and 30 deg tilt data to deal with preferred orientation | ||
