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Sample was incubated on the grid for 1 minute, subsequently washed/blotted 6 times in buffer, followed by addition of 3.5 ul buffer, which was blotted ...
Sample was incubated on the grid for 1 minute, subsequently washed/blotted 6 times in buffer, followed by addition of 3.5 ul buffer, which was blotted by vitrobot for 5 seconds prior to plunging.
3D Reconstruction
Reconstruction Method
HELICAL
Number of Particles
31908
Reported Resolution (Å)
4
Resolution Method
FSC 0.143 CUT-OFF
Other Details
A 5.0 A high-resolution limit was used for particle alignment in frealign.
Refinement Type
Symmetry Type
HELICAL
Axial Symmetry
C1
Axial Rise
5.11
Angular Rotation
-101.6
Map-Model Fitting and Refinement
Id
1 (6E26)
Refinement Space
REAL
Refinement Protocol
RIGID BODY FIT
Refinement Target
Overall B Value
Fitting Procedure
Details
"Fit in map" in UCSF Chimera was used to fit the previously determined, lowest energy NMR solution structure (PDB ID 6E26) into the sharpened density ...
"Fit in map" in UCSF Chimera was used to fit the previously determined, lowest energy NMR solution structure (PDB ID 6E26) into the sharpened density and to generate 9 symmetry-mates according to the determined helical parameters. The map was then iteratively refined in Phenix and Coot, maintaining strict non-crystallographic symmetry among the CARDs.
Data Acquisition
Detector Type
GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)
50.9
Imaging Experiment
1
Date of Experiment
Temperature (Kelvin)
Microscope Model
FEI TITAN KRIOS
Minimum Defocus (nm)
1250
Maximum Defocus (nm)
2500
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
2.7
Imaging Mode
BRIGHT FIELD
Specimen Holder Model
Nominal Magnification
130000
Calibrated Magnification
Source
FIELD EMISSION GUN
Acceleration Voltage (kV)
300
Imaging Details
EM Software
Task
Software Package
Version
PARTICLE SELECTION
EMAN2
PARTICLE SELECTION
RELION
2.1
IMAGE ACQUISITION
SerialEM
CTF CORRECTION
CTFFIND
MODEL FITTING
UCSF Chimera
MODEL REFINEMENT
PHENIX
MODEL REFINEMENT
Coot
INITIAL EULER ASSIGNMENT
RELION
2.1
INITIAL EULER ASSIGNMENT
FREALIGN
FINAL EULER ASSIGNMENT
FREALIGN
9.11
CLASSIFICATION
FREALIGN
9.11
RECONSTRUCTION
FREALIGN
9.11
Image Processing
CTF Correction Type
CTF Correction Details
Number of Particles Selected
Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION
141592
Filaments were manually selected using e2helixboxer.py. Segments were extracted from filaments using RELION, using a 30 A shift between particles.