3J7I | pdb_00003j7i

Structure of alpha- and beta- tubulin in GMPCPP-microtubules

ELECTRON MICROSCOPY

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Starting Model(s)

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

Sample
GMPCPP-microtubules

Specimen Preparation
Sample Aggregation State	HELICAL ARRAY
Vitrification Instrument	LEICA KF80
Cryogen Name	ETHANE
Sample Vitrification Details

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	320000
Reported Resolution (Å)	8.9
Resolution Method
Other Details
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

Map-Model Fitting and Refinement
Id	1 (1JFF)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target	Cross-correlation, Average map value
Overall B Value
Fitting Procedure
Details	METHOD--Local refinement, Domain fitting REFINEMENT PROTOCOL--Rigid body refinement DETAILS--Initial local fitting was done before the domains were separately fitted by using Chimera.

Data Acquisition
Detector Type	KODAK SO-163 FILM
Electron Dose (electrons/Å**2)	10

Imaging Experiment	1
Date of Experiment	2010-01-01
Temperature (Kelvin)	88
Microscope Model	JEOL 2010F
Minimum Defocus (nm)	1300
Maximum Defocus (nm)	2800
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	3.3
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	40000
Calibrated Magnification	40000
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	200
Imaging Details

EM Software
Task	Software Package	Version
MODEL FITTING	UCSF Chimera
RECONSTRUCTION	IMAGIC	5
RECONSTRUCTION	MATLAB

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
	Each Filament