1JFF

Refined structure of alpha-beta tubulin from zinc-induced sheets stabilized with taxol


ELECTRON CRYSTALLOGRAPHY

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1TUBPDB entry 1TUB

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1aberrant polymerization of tubulin5.8305Zn++, pH 5.8, aberrant polymerization of tubulin, temperature 305K

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 81.2α = 90
b = 93.5β = 90
c = 90γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11electron93FILMKODAK1994-01-01MSINGLE WAVELENGTH
21CCDGATAN
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ELECTRON MICROSCOPEJEOL 4000 electron microscope0.0194

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
13.520730.255.46124221242240
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
13.53.7732.31080

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
ELECTRON CRYSTALLOGRAPHYMOLECULAR REPLACEMENTPDB entry 1TUB3.52012422124226230.23150.2966random41.4
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]
26.510.8-37.4
RMS Deviations
KeyRefinement Restraint Deviation
c_angle_d1.561
c_bond_d0.01
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms6578
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms124

Software

Software
Software NamePurpose
CCP4model building
CNSrefinement
CCP4phasing
Sample
Alpha-Beta-tubulin sheets
Specimen Preparation
Sample Aggregation State2D ARRAY
Vitrification Instrument
Cryogen NameNITROGEN
Sample Vitrification Details
Embedding Materialtannin
Embedding Details
3D Reconstruction
Reconstruction MethodCRYSTALLOGRAPHY
Data Acquisition
Detector TypeGENERIC FILM
Electron Dose (electrons/Å**2)
Imaging Experiment12
Date of Experiment
Temperature (Kelvin)
Microscope ModelJEOL 4000JEOL 4000
Minimum Defocus (nm)
Maximum Defocus (nm)
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging ModeBRIGHT FIELDDIFFRACTION
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
Source
Acceleration Voltage (kV)
Imaging Details