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Visualization of two tRNAs trapped in transit during EF-G-mediated translocation
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 4KIY
Sample ribosomal 70S-EF-G complex
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK I Cryogen Name ETHANE Sample Vitrification Details Blot for 5-10 seconds before plunging into liquid ethane (FEI VITROBOT MARK I)
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 279309 Reported Resolution (Å) 6.8 Resolution Method FSC 0.5 CUT-OFF Other Details (Single particle--Applied symmetry: C1) Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 (4KIY) Refinement Space REAL Refinement Protocol RIGID BODY FIT Refinement Target Overall B Value Fitting Procedure Details REFINEMENT PROTOCOL--rigid body
Data Acquisition Detector Type KODAK SO-163 FILM Electron Dose (electrons/Å**2) 20
Imaging Experiment 1 Date of Experiment 2010-06-14 Temperature (Kelvin) 77 Microscope Model FEI POLARA 300 Minimum Defocus (nm) 2000 Maximum Defocus (nm) 5000 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS Imaging Mode BRIGHT FIELD Specimen Holder Model GATAN HELIUM Nominal Magnification 39000 Calibrated Magnification 39000 Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version MODEL FITTING UCSF Chimera RECONSTRUCTION SPIDER
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details The volumes were CTF-corrected in defocus groups with an average of approximately 906 individual images per group.