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CryoEM reconstruction of IST1-CHMP1B copolymer filament bound to ssDNA at 2.9 Angstrom resolution
ELECTRON MICROSCOPY
Sample
Helical assembly of IST1 and CHMP1B protein bound to ssDNA
Specimen Preparation
Sample Aggregation State
FILAMENT
Vitrification Instrument
FEI VITROBOT MARK III
Cryogen Name
ETHANE
Sample Vitrification Details
0 mm offset with 10 sec wait time and 2-4 sec blot
3D Reconstruction
Reconstruction Method
HELICAL
Number of Particles
101990
Reported Resolution (Å)
2.9
Resolution Method
FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type
HELICAL
Axial Symmetry
C1
Axial Rise
3.17
Angular Rotation
21.16
Map-Model Fitting and Refinement
Id
1
Refinement Space
REAL
Refinement Protocol
AB INITIO MODEL
Refinement Target
Overall B Value
52.5
Fitting Procedure
Details
Data Acquisition
Detector Type
GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)
62
Imaging Experiment
1
Date of Experiment
Temperature (Kelvin)
Microscope Model
FEI TITAN KRIOS
Minimum Defocus (nm)
Maximum Defocus (nm)
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
2.6
Imaging Mode
BRIGHT FIELD
Specimen Holder Model
FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification
29000
Calibrated Magnification
Source
FIELD EMISSION GUN
Acceleration Voltage (kV)
300
Imaging Details
EM Software
Task
Software Package
Version
PARTICLE SELECTION
RELION
2.1
IMAGE ACQUISITION
SerialEM
CTF CORRECTION
Gctf
1.06
MODEL FITTING
UCSF Chimera
MODEL FITTING
Coot
INITIAL EULER ASSIGNMENT
RELION
2.1
FINAL EULER ASSIGNMENT
RELION
2.1
CLASSIFICATION
RELION
2.1
RECONSTRUCTION
RELION
2.1
MODEL REFINEMENT
PHENIX
Image Processing
CTF Correction Type
CTF Correction Details
Number of Particles Selected
Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION
224252
Helical particle segments were selected using RELION manualpick and extracted using overlapping segments with an asymmetric unit of 17 subunits with a 3.0 Angstrom rise (51 Angstrom total).