3JAI
Structure of a mammalian ribosomal termination complex with ABCE1, eRF1(AAQ), and the UGA stop codon
ELECTRON MICROSCOPY
Sample |
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80S ribosome-nascent chain complex containing the UGA stop codon bound to eRF1(AAQ) and ABCE1 |
Sample Components |
80S ribosome |
eukaryotic release factor 1, G183A, G184A mutant |
ATP binding cassette E1 |
messenger RNA |
in vitro translated substrate |
tRNA |
Specimen Preparation | |
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Sample Aggregation State | PARTICLE |
Vitrification Instrument | FEI VITROBOT MARK III |
Cryogen Name | ETHANE |
Sample Vitrification Details | After 30 second wait time, blot for 3 seconds before plunging into liquid ethane (FEI VITROBOT MARK III). |
3D Reconstruction | |
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Reconstruction Method | SINGLE PARTICLE |
Number of Particles | 22058 |
Reported Resolution (Å) | 3.65 |
Resolution Method | FSC 0.143 CUT-OFF |
Other Details | |
Refinement Type | |
Symmetry Type | POINT |
Point Symmetry | C1 |
Map-Model Fitting and Refinement | |||||
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Id | 1 (3J92, 3J7P, 1DT9) | 2 (3BK7) | 3 (4V51) | ||
Refinement Space | RECIPROCAL | RECIPROCAL | RECIPROCAL | ||
Refinement Protocol | FLEXIBLE FIT | FLEXIBLE FIT | FLEXIBLE FIT | ||
Refinement Target | |||||
Overall B Value | |||||
Fitting Procedure | |||||
Details | REFINEMENT PROTOCOL--flexible | REFINEMENT PROTOCOL--flexible DETAILS--Sequence was modified in Coot to agree with rabbit sequence. | REFINEMENT PROTOCOL--flexible DETAILS--Sequence was modified in Coot to agree with the most prevalent tRNA sequence for each particular codon. |
Data Acquisition | |||||||||
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Detector Type | FEI FALCON II (4k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 30 |
Imaging Experiment | 1 |
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Date of Experiment | 2015-04-17 |
Temperature (Kelvin) | |
Microscope Model | FEI TITAN KRIOS |
Minimum Defocus (nm) | 1700 |
Maximum Defocus (nm) | 3600 |
Minimum Tilt Angle (degrees) | |
Maximum Tilt Angle (degrees) | |
Nominal CS | 2.7 |
Imaging Mode | BRIGHT FIELD |
Specimen Holder Model | |
Nominal Magnification | 59000 |
Calibrated Magnification | 104478 |
Source | FIELD EMISSION GUN |
Acceleration Voltage (kV) | 300 |
Imaging Details | Automated data acquisition using EPU (FEI) |
EM Software | ||
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Task | Software Package | Version |
CTF CORRECTION | CTFFIND | 3 |
MODEL FITTING | Coot | |
MODEL FITTING | UCSF Chimera | |
RECONSTRUCTION | RELION |