CryoEM structure of M. mazei topoisomerase VI(A-E342Q)-minicircle DNA complex in cleavage state
ELECTRON MICROSCOPY
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| other | Other | ||
| experimental model | PDB | 2Q2E | |
Refinement
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| f_dihedral_angle_d | 18.4671 |
| f_angle_d | 0.7383 |
| f_chiral_restr | 0.0478 |
| f_plane_restr | 0.0057 |
| f_bond_d | 0.0037 |
| Sample |
|---|
| Topoisomerase VI heterotetramer (A2B2) bound to minicircle DNA and ADPNP |
| Sample Components |
| Top6 heterotetramer (A2B2) |
| 306 bp minicircle DNA |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | Vitrification carried out in air |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 329731 |
| Reported Resolution (Å) | 2.5 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | |
| Refinement Type | |
| Symmetry Type | POINT |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (2Q2E) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | |||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | |||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | TFS FALCON 4i (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 30 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | TFS KRIOS |
| Minimum Defocus (nm) | 800 |
| Maximum Defocus (nm) | 1800 |
| 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) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | crYOLO | 1.9.6 |
| CTF CORRECTION | cryoSPARC | 4.4.1 |
| MODEL FITTING | Coot | 0.9.8.91 |
| MODEL FITTING | UCSF ChimeraX | 1.9 |
| MODEL FITTING | ISOLDE | 1.9 |
| MODEL REFINEMENT | PHENIX | 1.21.1_5286 |
| INITIAL EULER ASSIGNMENT | cryoSPARC | 4.4.1 |
| FINAL EULER ASSIGNMENT | cryoSPARC | 4.6.0 |
| RECONSTRUCTION | cryoSPARC | 4.6.0 |
| RECONSTRUCTION | EMReady | 2.0 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | 2479118 | |||
