3JAJ
Structure of the engaged state of the mammalian SRP-ribosome complex
ELECTRON MICROSCOPY
Sample |
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Engaged ribosome SRP complex |
Sample Components |
80S ribosome |
Signal recognition particle |
Specimen Preparation | |
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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 | |
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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 | |||||
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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 | |||||||||
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Detector Type | FEI FALCON II (4k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 27 |
Imaging Experiment | 1 |
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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 | ||
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Task | Software Package | Version |
MODEL FITTING | Coot | |
MODEL FITTING | REFMAC | |
MODEL FITTING | UCSF Chimera | |
RECONSTRUCTION | RELION |
Image Processing | ||||
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CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
Each particle |