ELECTRON MICROSCOPY


Sample

Cryo-EM map of the Yeast Exocyst complex overall structure at 5.5A resolution

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details Protein sample was applied onto a Quantifoil R1.2/1.3 golden grid and hold for 60 seconds, then blot for 2.5 seconds before plunging.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 343342
Reported Resolution (Å) 4.4
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol RIGID BODY FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details Exo70 (a.a.67-623) was first fit into the map with Situs as a rigid body. Then it was split as Exo70 (a.a.67-344) and Exo70 (a.a.345-623), and fit into the same position with Chimera.
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 50.0
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 2000
Maximum Defocus (nm) 3000
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.7
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification 22500
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION RELION 1.4
IMAGE ACQUISITION UCSFImage 4
CTF CORRECTION RELION 1.4
MODEL FITTING Situs 2.8
MODEL FITTING Chimera 1.10.1
MODEL REFINEMENT PHENIX 1.11.1
MODEL FITTING Situs 2.8
MODEL REFINEMENT PHENIX 1.11.1
MODEL FITTING Chimera 1.10.1
MODEL REFINEMENT PHENIX 1.11.1
MODEL FITTING Chimera 1.10.1
MODEL REFINEMENT Coot 0.8.2
MODEL REFINEMENT PHENIX 1.11.1
MODEL FITTING Chimera 1.10.1
MODEL REFINEMENT PHENIX 1.11.1
MODEL FITTING Chimera 1.10.1
MODEL REFINEMENT Coot 0.8.2
MODEL REFINEMENT PHENIX 1.11.1
MODEL FITTING Coot 0.8.2
MODEL REFINEMENT PHENIX 1.11.1
INITIAL EULER ASSIGNMENT RELION 1.4
FINAL EULER ASSIGNMENT RELION 1.4
CLASSIFICATION RELION 1.4
RECONSTRUCTION RELION 1.4
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION The defocus value of each image was determined by CTFFIND3.
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