1ZO1

IF2, IF1, and tRNA fitted to cryo-EM data OF E. COLI 70S initiation complex

ELECTRON MICROSCOPY

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1G7T
experimental model	PDB	1HRO

Sample
70S INITIATION COMPLEX

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK I
Cryogen Name	ETHANE
Sample Vitrification Details	HOLEY CARBON GRID AT 20C FLASH FROZEN INTO LIQUID ETHAN

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	20283
Reported Resolution (Å)	13.8
Resolution Method	FSC 0.5 CUT-OFF
Other Details	resolution 13.8 ANGSTROMS (FSC=0.5) and 8.6 ANGSTROMS (3sigma)
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

Map-Model Fitting and Refinement
Id	1 (1G7T, 1HRO)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target	BEST FIT USING RSREF
Overall B Value
Fitting Procedure
Details	METHOD--COORDINATE FILES WERE FITTED TO THE E. COLI TRANSLATION INITIATION COMPLEX MAP (EMBL-EMD 3525). REFINEMENT PROTOCOL--RIGID BODY FIT OF DOMAINS I-V OF IF2, RIGID BODY FIT OF IF1 AND FMET-TRNA

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

Imaging Experiment	1
Date of Experiment	2004-01-01
Temperature (Kelvin)	100
Microscope Model	FEI TECNAI F20
Minimum Defocus (nm)	-930
Maximum Defocus (nm)	-3930
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	2
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	39000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	200
Imaging Details	LOW DOSE MODE

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
	DEFOCUS GROUPS 0.93-3.93 UM