ELECTRON MICROSCOPY

Sample

IST1-NTD and CHMP1B double-stranded helical filament

Specimen Preperation
Sample Aggregation State FILAMENT
Vitrification Instrument FEI VITROBOT MARK III
Cryogen Name ETHANE
Sample Vitrification Details Deposited 3.5 uL sample, blotted 3-6 seconds (0 mm offset), and plunged into liquid ethane (VITROBOT MARK III).
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles 188713
Reported Resolution (Å) 4.0
Resolution Method ?
Other Details Modified version of IHRSR algorithms as implemented in SPIDER was used to determine the helical symmetry. 3D reconstructions were performed using RELION.
Refinement Type
Symmetry Type HELICAL
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol ?
Refinement Target Molprobity validation, cross-correlation
Overall B Value ?
Fitting Procedure ?
Details DETAILS--IST1 starting model (3FRR) was idealized in Rosetta, then relaxed while the structure was constrained. Iterative loop building was used.
Data Acquisition
Detector Type KODAK SO-163 FILM
Electron Dose (electrons/Å2) 20
Imaging Experiment
Date of Experiment 2013-06-01
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 600
Maximum Defocus (nm) 3000
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.0
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification 59000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
CTF CORRECTION CTFFIND 3
MODEL FITTING Coot ?
MODEL FITTING MDFF ?
MODEL FITTING NAMD ?
MODEL FITTING Rosetta ?
MODEL FITTING UCSF Chimera ?
RECONSTRUCTION EMAN 2
RECONSTRUCTION IHRSR ?
RECONSTRUCTION RELION ?
RECONSTRUCTION SPIDER ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. CTFFIND3
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