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Cryo-EM structure of mouse Pannexin 1 purified in Salipro nanoparticles
ELECTRON MICROSCOPY
Sample
Salipro-mPANX1
Specimen Preparation
Sample Aggregation State
PARTICLE
Vitrification Instrument
FEI VITROBOT MARK IV
Cryogen Name
ETHANE
Sample Vitrification Details
To overcome preferred orientation, 0.5 mM fluorinated Fos-Choline 8 was added to the sample just before the grid freezing. Blot parameter: blot force ...
To overcome preferred orientation, 0.5 mM fluorinated Fos-Choline 8 was added to the sample just before the grid freezing. Blot parameter: blot force +20, blot time 10 s, waiting time 30s
3D Reconstruction
Reconstruction Method
SINGLE PARTICLE
Number of Particles
268823
Reported Resolution (Å)
3.1
Resolution Method
FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type
POINT
Point Symmetry
C7
Map-Model Fitting and Refinement
Id
1
Refinement Space
RECIPROCAL
Refinement Protocol
RIGID BODY FIT
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector Type
FEI FALCON IV (4k x 4k)
Electron Dose (electrons/Å**2)
40.24
Imaging Experiment
1
Date of Experiment
Temperature (Kelvin)
Microscope Model
FEI TITAN KRIOS
Minimum Defocus (nm)
500
Maximum Defocus (nm)
2000
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
165000
Calibrated Magnification
Source
FIELD EMISSION GUN
Acceleration Voltage (kV)
300
Imaging Details
Titan Krios G4 was used with fringe-free imaging and aberration-free image shifts. Nominal pixel size for 165kx 0.75 A, calibrated pixel size 0.727 A.