ELECTRON MICROSCOPY

Sample

A complex of GroEL with GroTAC peptide

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details ?
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 203031
Reported Resolution (Å) 2.45
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 AB INITIO MODEL
Refinement Target 0.88
Overall B Value ?
Fitting Procedure ?
Details The C-alpha model was obtained by two rounds of ab initio modeling using machine learning-based ModelAngelo 1.09 software. The incorrectly assigned GroEL residues were then manually corrected. The C-alpha trace of the GroTAC peptide was initially constructed by ModelAngelo, with residue identities suggested through a comparison to the 1MNF PDB structure. The reconstruction to full-atom was performed using cg2all 1.5 software. The first stage of refinement was done in Coot (0.9.8.5). The final refinement stage involved two rounds of phenix.real_space_refine (Phenix 1.21.5207).
Data Acquisition
Detector Type FEI FALCON III (4k x 4k)
Electron Dose (electrons/Å2) 40.0
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model TFS GLACIOS
Minimum Defocus (nm) 800
Maximum Defocus (nm) 2200
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 240000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 200
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cryoSPARC 4.3
IMAGE ACQUISITION EPU 3.4
CTF CORRECTION cryoSPARC 4.3
INITIAL EULER ASSIGNMENT cryoSPARC 4.4
FINAL EULER ASSIGNMENT cryoSPARC 4.4
CLASSIFICATION cryoSPARC 4.4
RECONSTRUCTION cryoSPARC 4.4
MODEL REFINEMENT Coot 0.9.8.5
MODEL REFINEMENT PHENIX 1.21.5207
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?
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