8V4N

ELECTRON MICROSCOPY

Sample

Myxococcus xanthus EncA 3xHis pore mutant with T=1 icosahedral symmetry

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details Blot force: 5 Blot time: 2 seconds
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 77769
Reported Resolution (Å) 2.43
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 FLEXIBLE FIT
Refinement Target Cross-correlation coefficient
Overall B Value 98.5
Fitting Procedure ?
Details The starting model was generated using ESMfold then fit into the map using ChimeraX. The placed coordinates were then manually refined using Coot, followed by real space refinement in Phenix.
Data Acquisition
Detector Type GATAN K3 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å2) 50
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1000
Maximum Defocus (nm) 2500
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 105000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cryoSPARC 4.2.1
IMAGE ACQUISITION SerialEM ?
CTF CORRECTION cryoSPARC 4.2.1
MODEL FITTING UCSF ChimeraX 1.25
INITIAL EULER ASSIGNMENT cryoSPARC 4.2.1
FINAL EULER ASSIGNMENT cryoSPARC 4.2.1
RECONSTRUCTION cryoSPARC 4.2.1
MODEL REFINEMENT Coot 0.9.8.1
MODEL REFINEMENT PHENIX 1.20.1-4487
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?