2XEA | pdb_00002xea

4.6 ANGSTROM CRYO-EM RECONSTRUCTION OF TOBACCO MOSAIC VIRUS FROM IMAGES RECORDED AT 300 KEV ON A 4KX4K CCD CAMERA

ELECTRON MICROSCOPY

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2XEA

Sample
TOBACCO MOSAIC VIRUS

Specimen Preparation
Sample Aggregation State	FILAMENT
Vitrification Instrument	HOMEMADE PLUNGER
Cryogen Name	ETHANE
Sample Vitrification Details	LIQUID ETHANE

3D Reconstruction
Reconstruction Method	HELICAL
Number of Particles	5300
Reported Resolution (Å)	4.6
Resolution Method
Other Details	BPRP WAS USED TO RECONSTRUCT THE 3D VOLUME THE PDB 2OM3 WAS DOCKED INTO THE CRYO-EM DENSITY USING CHIMERA. SOME SIDE CHAIN RESIDUES AND THE INNER LOOP OF THE CP WERE REMODELLED USING COOT. SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-1730
Refinement Type
Symmetry Type	HELICAL

Map-Model Fitting and Refinement
Id	1 (2XEA)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target	Cross-correlation coefficient
Overall B Value
Fitting Procedure
Details	METHOD--RIGID BODY, REAL SPACE REFINEMENT PROTOCOL--CRYO-EM

Data Acquisition
Detector Type	GATAN ULTRASCAN 4000 (4k x 4k)
Electron Dose (electrons/Å**2)	25

Imaging Experiment	1
Date of Experiment	2009-02-01
Temperature (Kelvin)	78
Microscope Model	FEI TECNAI F30
Minimum Defocus (nm)	900
Maximum Defocus (nm)	3000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	2.3
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	90000
Calibrated Magnification	121000
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
MODEL FITTING	Coot
MODEL FITTING	UCSF Chimera
RECONSTRUCTION	IMAGIC
RECONSTRUCTION	SPIDER

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
	EACH PARTICLE WAS FULLY CTF CORRECTED