2WWB

CRYO-EM STRUCTURE OF THE MAMMALIAN SEC61 COMPLEX BOUND TO THE ACTIVELY TRANSLATING WHEAT GERM 80S RIBOSOME

ELECTRON MICROSCOPY

Sample
ACTIVELY TRANSLATING WHEAT GERM (O. SATIVA) 80S RIBOSOME PROGRAMMED WITH A NASCENT POLYPEPTIDE CHAIN CONTAINING A P- SITE TRNA AND THE TYPE I SIGNAL ANCHOR SEQUENCE OF DPAP-B ( DIPEPTIDYLAMINOPEPTIDASE B) BOUND TO THE MAMMALIAN (CANIS FAMILIARIS) SEC61 COMPLEX.

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK I
Cryogen Name	ETHANE
Sample Vitrification Details	CRYOGEN- ETHANE, HUMIDITY- 95, INSTRUMENT- VITROBOT, METHOD- BLOT FOR 10 SECONDS BEFORE PLUNGING, USE 2 LAYERS OF FILTER PAPER

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	221445
Reported Resolution (Å)	6.48
Resolution Method
Other Details	SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-1652.
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

Map-Model Fitting and Refinement
Id	1
Refinement Space
Refinement Protocol	FLEXIBLE FIT
Refinement Target
Overall B Value
Fitting Procedure
Details	METHOD--MANUAL FOLLOWED BY MDFF

Data Acquisition
Detector Type	KODAK SO-163 FILM
Electron Dose (electrons/Å**2)	25

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)	84
Microscope Model	FEI POLARA 300
Minimum Defocus (nm)	1250
Maximum Defocus (nm)	4700
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	2.26
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	39000
Calibrated Magnification	38000
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
RECONSTRUCTION	SPIDER

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
	DEFOCUS GROUP VOLUMES

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.