7UJL
Bacteriophage Lambda Red-Beta N-terminal domain helical assembly in complex with dsDNA
ELECTRON MICROSCOPY
| Sample |
|---|
| RedBeta177 oligomeric helical assembly bound to two complementary 27mer ssDNA oligonucleotides |
| Sample Components |
| Red-beta annealase N-terminal domain |
| Template ssDNA |
| Complementary ssDNA |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | HELICAL ARRAY |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | Sample loading volume ranged between 2 and 3 microlitres. Samples were blotted for 5 seconds prior to vitrification. |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | HELICAL |
| Number of Particles | 26525 |
| Reported Resolution (Å) | 3.3 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | |
| Refinement Type | |
| Symmetry Type | HELICAL |
| Axial Symmetry | C1 |
| Axial Rise | 2.078 |
| Angular Rotation | -12.947 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | Correlation coefficient | ||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | |||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K2 SUMMIT (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 50 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | FEI TITAN KRIOS |
| Minimum Defocus (nm) | 500 |
| Maximum Defocus (nm) | 2500 |
| 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 | 59500 |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | cryoSPARC | 3.0 |
| IMAGE ACQUISITION | EPU | |
| CTF CORRECTION | cryoSPARC | 3.0 |
| MODEL FITTING | ISOLDE | |
| MODEL REFINEMENT | PHENIX | |
| INITIAL EULER ASSIGNMENT | cryoSPARC | 3.0 |
| FINAL EULER ASSIGNMENT | cryoSPARC | 3.0 |
| CLASSIFICATION | RELION | 3.1 |
| RECONSTRUCTION | cryoSPARC | 3.0 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | 922280 | 922280 particles were initially selected using cryoSPARC filament tracing | ||
