1XYR

Poliovirus 135S cell entry intermediate

ELECTRON MICROSCOPY

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Sample
POLIOVIRUS 135S CELL ENTRY INTERMEDIATE

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument
Cryogen Name	ETHANE
Sample Vitrification Details	Plunge freezing into liquid ethane

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	3641
Reported Resolution (Å)	11
Resolution Method
Other Details
Refinement Type
Symmetry Type	POINT
Point Symmetry	I

Map-Model Fitting and Refinement
Id	1 (1HXS)
Refinement Space	RECIPROCAL
Refinement Protocol	RIGID BODY FIT
Refinement Target	amplitude-weighted phase error, and the summation of the squared model-based amplitudes.
Overall B Value
Fitting Procedure
Details	METHOD--gradient search REFINEMENT PROTOCOL--Rigid body (chains 1 and 6 as one rigid body, chains 3 and 7 as one rigid body, chains 2 and 8 as individual rigid bodies, chain 5 placed along 5fold axis visually)

Data Acquisition
Detector Type	KODAK SO-163 FILM
Electron Dose (electrons/Å**2)	1

Imaging Experiment	1
Date of Experiment	2002-09-17
Temperature (Kelvin)	77
Microscope Model	FEI TECNAI F20
Minimum Defocus (nm)	900
Maximum Defocus (nm)	3000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	2
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	50000
Calibrated Magnification	50000
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	200
Imaging Details	Focal pairs were taken

EM Software
Task	Software Package	Version
MODEL FITTING	INSOUT
RECONSTRUCTION	EM3DR

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
	CTF correction of each particle. Phase flipped correction for particles included in the orientation search, and deconvoluted and gaussian decay corrected for the particles used in the reconstruction