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Cryo-EM structure of the ZBTB9 BTB domain filament
ELECTRON MICROSCOPY
Starting Model(s)
Initial Refinement Model(s)
Type
Source
Accession Code
Details
in silico model
AlphaFold
Refinement
RMS Deviations
Key
Refinement Restraint Deviation
f_dihedral_angle_d
10.9598
f_angle_d
0.6504
f_chiral_restr
0.0391
f_plane_restr
0.005
f_bond_d
0.0029
Sample
ZBTB9 BTB domain filament
Specimen Preparation
Sample Aggregation State
FILAMENT
Vitrification Instrument
LEICA EM GP
Cryogen Name
ETHANE
Sample Vitrification Details
Grids were vitrified using a Leica EM GP plunge freezer operated at 90% humidity and 10 C with 10 s pre-blot, 3 s blot, 3 s post-blot.
3D Reconstruction
Reconstruction Method
HELICAL
Number of Particles
147135
Reported Resolution (Å)
8.1
Resolution Method
FSC 0.143 CUT-OFF
Other Details
Asymmetric helical refinement followed by local refinement led to the final reconstruction. The helical symmetry values represent the angular rotation ...
Asymmetric helical refinement followed by local refinement led to the final reconstruction. The helical symmetry values represent the angular rotation and axial rise for two dimers at the core of the map, where the local resolution was the highest. These values, however, were not applied during helical refinement as they did not improve the quality of the final reconstruction.