5AEF | pdb_00005aef

Electron cryo-microscopy of an Abeta(1-42)amyloid fibril


ELECTRON MICROSCOPY
Sample
ABETA(1-42) AMYLOID-LIKE FIBRIL
Specimen Preparation
Sample Aggregation StateFILAMENT
Vitrification InstrumentGATAN CRYOPLUNGE 3
Cryogen NameETHANE
Sample Vitrification Details4 SEC BACKSIDE BLOTTING
3D Reconstruction
Reconstruction MethodHELICAL
Number of Particles62320
Reported Resolution (Å)5
Resolution Method
Other DetailsFINAL MAP WAS CALCULATED FROM 29 SINGLE FILAMENT RECONSTRUCTIONS. DATA USED FOR REFINEMENT WAS NEVER BELOW 10 ANGSTROM RESOLUTION. RESOLUTION OF FIBRI ...FINAL MAP WAS CALCULATED FROM 29 SINGLE FILAMENT RECONSTRUCTIONS. DATA USED FOR REFINEMENT WAS NEVER BELOW 10 ANGSTROM RESOLUTION. RESOLUTION OF FIBRIL CORE IS ABOUT 5 ANGSTROM. 3 POSSIBLE MODELS FOR THE CENTRAL REGION OF A ABETA(1-42) FIBRIL RECONSTRUCTION. MODEL1 ABETA(17-42) MODEL2 ABETA( 16-41) MODEL3 ABETA(15-40) SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-3132. (DEPOSITION ID: 13698).
Refinement Type
Symmetry TypeHELICAL
Map-Model Fitting and Refinement
Id1
Refinement SpaceREAL
Refinement ProtocolOTHER
Refinement TargetELECTRON DENSITY
Overall B Value
Fitting Procedure
DetailsMETHOD--DIREX REFINEMENT PROTOCOL--PEPTIDE CHAIN
Data Acquisition
Detector TypeKODAK SO-163 FILM
Electron Dose (electrons/Å**2)30
Imaging Experiment1
Date of Experiment2010-02-05
Temperature (Kelvin)100
Microscope ModelFEI TECNAI F30
Minimum Defocus (nm)1750
Maximum Defocus (nm)3000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS2
Imaging ModeBRIGHT FIELD
Specimen Holder Model
Nominal Magnification59000
Calibrated Magnification58333
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
RECONSTRUCTIONFREALIX
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
INDIVIDUAL HELICAL SUBUNITS