ELECTRON MICROSCOPY

Sample

80S ribosome bound to mRNA containing Kozak sequence and to two tRNAs

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK II
Cryogen Name ETHANE
Sample Vitrification Details Plunged into liquid ethane (FEI VITROBOT MARK II)
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 23163
Reported Resolution (Å) 6.3
Resolution Method FSC 0.143 CUT-OFF
Other Details (Single particle--Applied symmetry: C1)
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol RIGID BODY FIT
Refinement Target cross-correlation
Overall B Value ?
Fitting Procedure ?
Details REFINEMENT PROTOCOL--rigid body DETAILS--3U5B, 3U5C, 3U5D, and 3U5E were combined prior to fitting. tRNAs and mRNA were modeled using individual tRNAs and mRNA from the crystal structure (3I9B) of the classical-state 70S ribosome. The structure of rpL1 was obtained by homology modeling from PDB ID 3J3B.
Data Acquisition
Detector Type FEI FALCON I (4k x 4k)
Electron Dose (electrons/Å2) 30
Imaging Experiment
Date of Experiment 2013-01-02
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1159
Maximum Defocus (nm) 4844
Minimum Tilt Angle (degrees) 0.0
Maximum Tilt Angle (degrees) 0.0
Nominal CS 0.01
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification 133333
Calibrated Magnification 133333
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
CTF CORRECTION CTFFIND 3
MODEL FITTING CNS ?
MODEL FITTING UCSF Chimera ?
RECONSTRUCTION EMAN 2
RECONSTRUCTION FREALIGN ?
RECONSTRUCTION IMAGIC ?
RECONSTRUCTION RSAMPLE ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. CTFFIND3, FREALIGN per micrograph