4V3P | pdb_00004v3p

The molecular structure of the left-handed supra-molecular helix of eukaryotic polyribosomes

ELECTRON MICROSCOPY

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3IZ6

Sample
POLY-RIBOSOME FROM IN VITRO WHEAT GERM SYSTEM

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details	VITRIFICATION 1 --CRYOGEN- ETHANE, HUMIDITY-95, TEMPERATURE- 120,INSTRUMENT- FEI VITROBOT MARK IV, METHOD- 3UL OF SAMPLE APPLIED ON 300 MESH HOLY CARBON QUANTIFOIL GRID. BLOTTING WAS DONE IN VITROBOT MARK IV, BLOT TIME 0.5 SEC, BLOT FORCE 5

3D Reconstruction
Reconstruction Method	SUBTOMOGRAM AVERAGING
Number of Particles	106
Reported Resolution (Å)	34
Resolution Method
Other Details	SUBMISSION BASED ON EXPERIMENTAL DATA
Refinement Type
Symmetry Type	HELICAL

Map-Model Fitting and Refinement
Id	1 (3IZ6)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target
Overall B Value
Fitting Procedure
Details	METHOD--RIGID BODY REFINEMENT PROTOCOL--X-RAY

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

Imaging Experiment	1
Date of Experiment	2013-01-01
Temperature (Kelvin)	90
Microscope Model	FEI TECNAI F30
Minimum Defocus (nm)	2000
Maximum Defocus (nm)	4000
Minimum Tilt Angle (degrees)	-70
Maximum Tilt Angle (degrees)	70
Nominal CS	2
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	39000
Calibrated Magnification	41176
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	150
Imaging Details

EM Software
Task	Software Package	Version
MODEL FITTING	UCSF Chimera
RECONSTRUCTION	IMAGIC
RECONSTRUCTION	IMOD
RECONSTRUCTION	Xmipp