4V7C

Structure of the Ribosome with Elongation Factor G Trapped in the Pre-Translocation State (pre-translocation 70S*tRNA structure)

ELECTRON MICROSCOPY

Sample
Pre-translocation ribosome bound to A/P, P/E hybrid state tRNA
Sample Components
70S ribosome
Transfer RNA
Messenger RNA

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK II
Cryogen Name	ETHANE
Sample Vitrification Details	Freshly glow-disharged grids were loaded into an FEI Mark II Vitrobot and equilibrated to 95% relative humidity at 22 degrees Celsius. 2 microliters o ...	Freshly glow-disharged grids were loaded into an FEI Mark II Vitrobot and equilibrated to 95% relative humidity at 22 degrees Celsius. 2 microliters of sample was applied through the side port, blotted for 7 seconds with a positional offset of 2, and plunged into liquid ethane.

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	85115
Reported Resolution (Å)	7.6
Resolution Method	FSC 0.143 CUT-OFF
Other Details	Refinement included data to 12 Angstrom resolution to limit FSC bias. See primary citation Supplementary Information for details. (Single particle det ...	Refinement included data to 12 Angstrom resolution to limit FSC bias. See primary citation Supplementary Information for details. (Single particle details: Refinement and 3D classification performed by Frealign) (Single particle--Applied symmetry: C1)
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

Map-Model Fitting and Refinement
Id	1 (4GD1)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target	Cross-correlation
Overall B Value
Fitting Procedure
Details	REFINEMENT PROTOCOL--rigid body DETAILS--Chain Y not used in refinement

Data Acquisition
Detector Type	FEI FALCON I (4k x 4k)
Electron Dose (electrons/Å**2)	30

Imaging Experiment	1
Date of Experiment	2012-11-02
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	1150
Maximum Defocus (nm)	6950
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	0.01
Imaging Mode	BRIGHT FIELD
Specimen Holder Model	FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification	133333
Calibrated Magnification	134615
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
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

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.