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 2WWB | pdb_00002wwb

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 StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK I
Cryogen NameETHANE
Sample Vitrification DetailsCRYOGEN- ETHANE, HUMIDITY- 95, INSTRUMENT- VITROBOT, METHOD- BLOT FOR 10 SECONDS BEFORE PLUNGING, USE 2 LAYERS OF FILTER PAPER
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles221445
Reported Resolution (Å)6.48
Resolution Method
Other DetailsSUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-1652.
Refinement Type
Symmetry TypePOINT
Point SymmetryC1
Map-Model Fitting and Refinement
Id1
Refinement Space
Refinement ProtocolFLEXIBLE FIT
Refinement Target
Overall B Value
Fitting Procedure
DetailsMETHOD--MANUAL FOLLOWED BY MDFF
Data Acquisition
Detector TypeKODAK SO-163 FILM
Electron Dose (electrons/Å**2)25
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)84
Microscope ModelFEI POLARA 300
Minimum Defocus (nm)1250
Maximum Defocus (nm)4700
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS2.26
Imaging ModeBRIGHT FIELD
Specimen Holder Model
Nominal Magnification39000
Calibrated Magnification38000
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
RECONSTRUCTIONSPIDER
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
DEFOCUS GROUP VOLUMES