6NWQ

Chronic traumatic encephalopathy Type II Tau filament


ELECTRON MICROSCOPY
Sample
Tau filaments extracted from the temporal cortex of a patient with chronic traumatic encephalopathy
Specimen Preparation
Sample Aggregation StateTISSUE
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification Details
3D Reconstruction
Reconstruction MethodHELICAL
Number of Particles7621
Reported Resolution (Å)3.4
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypeHELICAL
Axial SymmetryC2
Axial Rise2.37
Angular Rotation179.4
Map-Model Fitting and Refinement
Id1
Refinement SpaceRECIPROCAL
Refinement Protocol
Refinement TargetFourier shell correlation
Overall B Value51.7
Fitting Procedure
DetailsFourier-space refinement of the complete atomic model against the chronic traumatic encephalopathy Type II Tau filament map was performed in REFMAC. A ...Fourier-space refinement of the complete atomic model against the chronic traumatic encephalopathy Type II Tau filament map was performed in REFMAC. A stack of three consecutive monomers was refined to preserve nearest-neighbour interactions for the middle chain.
Data Acquisition
Detector TypeGATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)55.48
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TITAN KRIOS
Minimum Defocus (nm)1700
Maximum Defocus (nm)2800
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS2.7
Imaging ModeBRIGHT FIELD
Specimen Holder Model
Nominal Magnification130000
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
PARTICLE SELECTIONRELION3.0
IMAGE ACQUISITIONEPU
CLASSIFICATIONRELION3.0
RECONSTRUCTIONRELION3.0
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION