1TUB

TUBULIN ALPHA-BETA DIMER, ELECTRON DIFFRACTION

ELECTRON CRYSTALLOGRAPHY

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1				TWO-DIMENSIONAL SHEETS ARE FORMED UNDER NORMAL POLYMERIZING CONDITIONS WITH THE ADDITION OF 1 MM ZNCL2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 80	α = 90
b = 92	β = 90
c = 90	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	electron					1996-09-21

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic B
ELECTRON CRYSTALLOGRAPHY		3.7

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6789
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	118

Sample
alpha-beta tubulin sheets

Specimen Preparation
Sample Aggregation State	2D ARRAY
Embedding Material	tannin-glucose
Embedding Details

3D Reconstruction
Reconstruction Method	CRYSTALLOGRAPHY

Data Acquisition
Detector Type	GENERIC FILM
Electron Dose (electrons/Å**2)

Imaging Experiment	1	2
Date of Experiment
Temperature (Kelvin)
Microscope Model	JEOL 4000	JEOL 4000
Minimum Defocus (nm)
Maximum Defocus (nm)
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	DIFFRACTION	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
Source	FIELD EMISSION GUN	FIELD EMISSION GUN
Acceleration Voltage (kV)	400	400
Imaging Details