8PEG

Escherichia coli paused disome complex (queueing 70S non-rotated closed PRE state)

ELECTRON MICROSCOPY

Refinement

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	14.85
f_angle_d	0.722
f_chiral_restr	0.047
f_plane_restr	0.007
f_bond_d	0.006

Sample
Escherichia coli paused disome complex

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details	Withdrawn samples were spotted directly onto freshly glow-discharged holey carbon grids, blotted for 1-2 s, and flash frozen in liquid ethane using a ...	Withdrawn samples were spotted directly onto freshly glow-discharged holey carbon grids, blotted for 1-2 s, and flash frozen in liquid ethane using a Vitrobot Mark IV plunger (ThermoFisher Scientific) after a wait time of 40 s at 4 degrees Celcius.

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	32334
Reported Resolution (Å)	3.3
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

Map-Model Fitting and Refinement
Id	1 (7N1P)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target	CC
Overall B Value
Fitting Procedure
Details	The atomic model of the E. coli 70S ribosome (PDB ID: 7N1P) was initially docked into the postprocessed density maps with UCSF Chimera and manually ad ...	The atomic model of the E. coli 70S ribosome (PDB ID: 7N1P) was initially docked into the postprocessed density maps with UCSF Chimera and manually adjusted in Coot. All models were refined over multiple rounds using the module phenix.real_space_refine in PHENIX and interactive model building and refinement in Coot, using libG restraints for the RNAs.

Data Acquisition
Detector Type	GATAN K3 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å**2)	45

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	500
Maximum Defocus (nm)	2000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	2.7
Imaging Mode	BRIGHT FIELD
Specimen Holder Model	FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification	81000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.20.1_4487

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION		1883839

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 R01GM133198.