ELECTRON MICROSCOPY

Sample

Yeast E3 ubiquitin ligase Tom1p with an internal truncation at the acidic domain (residues 1873-2131).

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK I
Cryogen Name ETHANE
Sample Vitrification Details Specimens were prepared on Quantifoil R 2/2 Cu300 grids after glow discharge for 1 minute at 25 mA. The detergent sample was concentrated to 8.1 mg/mL in 0.01% CHAPS and 0.05% NP-40. 2.5 uL of sample was applied to grids and blotted for 2.5 seconds before vitrification by plunging into liquid ethane. For samples without detergent, protein was concentrated to 0.44 mg/mL and blotted for 1.5 seconds before vitrification.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 462711
Reported Resolution (Å) 3.07
Resolution Method FSC 0.143 CUT-OFF
Other Details The separately processed dataset #1 and #2 particles were combined for a total of 531,549 starting particles for further processing and refinement. A round of 2D classification resulted in selection of 477,889 particles, which were Fourier cropped from a box size of 680 to 320 pixels for further processing. Two-component 3DVA was performed after map refinement of the combined dataset with a filter resolution of 4 A. 3DVA display was subsequently run to give 8 intermediates along the first principal component at a filter resolution of 5 A. The top 4 intermediates with the highest number of particles were combined to yield 462,711 and refined using non-uniform refinement to an estimated overall resolution of 3.07 A.
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space ?
Refinement Protocol ?
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K3 (6k x 4k)
Electron Dose (electrons/Å2) 47
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model TFS KRIOS
Minimum Defocus (nm) 800
Maximum Defocus (nm) 2000
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS ?
Imaging Mode OTHER
Specimen Holder Model ?
Nominal Magnification ?
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cryoSPARC ?
CTF CORRECTION cryoSPARC ?
MODEL REFINEMENT PHENIX ?
CLASSIFICATION cryoSPARC ?
RECONSTRUCTION cryoSPARC ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
NONE ?
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