4V47

Real space refined coordinates of the 30S and 50S subunits fitted into the low resolution cryo-EM map of the EF-G.GTP state of E. coli 70S ribosome

ELECTRON MICROSCOPY

---

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1IBL
experimental model	PDB	1FJG
experimental model	PDB	1FFK
experimental model	PDB	1JJ2
experimental model	PDB	1LNR
experimental model	PDB	1GIY

Sample
E. coli 70S ribosome -EF-G.GTP complex

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument
Cryogen Name
Sample Vitrification Details	Rapid-freezing in liquid ethane

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles
Reported Resolution (Å)	12.3
Resolution Method
Other Details	SPIDER package
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

Map-Model Fitting and Refinement
Id	1 (1IBL, 1FJG, 1FFK, 1JJ2, 1LNR, 1GIY)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target	cross-correlation coefficient, real space R factor
Overall B Value
Fitting Procedure
Details	METHOD--auto REFINEMENT PROTOCOL--Multi-rigid body, real-space refinement

Data Acquisition
Detector Type	KODAK SO-163 FILM
Electron Dose (electrons/Å**2)	20

Imaging Experiment	1
Date of Experiment	2001-01-15
Temperature (Kelvin)	93
Microscope Model	FEI TECNAI F20
Minimum Defocus (nm)	2000
Maximum Defocus (nm)	4000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	2
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	50000
Calibrated Magnification	49696
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	200
Imaging Details

EM Software
Task	Software Package	Version
MODEL FITTING	RSRef
MODEL FITTING	RSRef

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
	CTF correction of 3D-maps