3JAJ
Structure of the engaged state of the mammalian SRP-ribosome complex
ELECTRON MICROSCOPY
| Sample |
|---|
| Engaged ribosome SRP complex |
| Sample Components |
| 80S ribosome |
| Signal recognition particle |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | 3 uL of sample was incubated on the grid for 30 seconds, blotted for 3 seconds, then flash-frozen in liquid ethane (FEI VITROBOT MARK IV). |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 52061 |
| Reported Resolution (Å) | 3.75 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | gold-standard |
| Refinement Type | HALF-MAPS REFINED INDEPENDENTLY |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (1WGW, 4P3E, 1E80, 1E8S, 3J7O, 3J7P) | 2 (1QB2) | |||
| Refinement Space | RECIPROCAL | REAL | |||
| Refinement Protocol | RIGID BODY FIT | ||||
| Refinement Target | R-factor | ||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | METHOD--rigid body | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | FEI FALCON II (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 27 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | 2014-06-16 |
| Temperature (Kelvin) | |
| Microscope Model | FEI TITAN KRIOS |
| Minimum Defocus (nm) | 1000 |
| Maximum Defocus (nm) | 3500 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | 2.7 |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | |
| Nominal Magnification | 59000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| MODEL FITTING | Coot | |
| MODEL FITTING | REFMAC | |
| MODEL FITTING | UCSF Chimera | |
| RECONSTRUCTION | RELION | |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| Each particle | ||||
