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Structure of a mammalian ribosomal termination complex with ABCE1, eRF1(AAQ), and the UAG stop codon
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 3J92 experimental model PDB 3J7P experimental model PDB 1DT9 experimental model PDB 3BK7 experimental model PDB 4V51
Sample 80S ribosome-nascent chain complex containing the UAG 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 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 Reconstruction Method SINGLE PARTICLE Number of Particles 20515 Reported Resolution (Å) 3.45 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement 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 Detector Type FEI FALCON II (4k x 4k) Electron Dose (electrons/Å**2) 30
Imaging Experiment 1 Date of Experiment 2015-02-25 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 Task Software Package Version CTF CORRECTION CTFFIND 3 MODEL FITTING Coot MODEL FITTING UCSF Chimera RECONSTRUCTION RELION