ELECTRON MICROSCOPY

Sample

Connexin-26 Gap Junction Channel

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details After application of sample to the C-flat holey carbon grid, sample was blotted with Whatman no. 1 filter paper for ~4s, blot force of 3, and 100 % humidity at 22oC.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 22805
Reported Resolution (Å) 7.5
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 OTHER
Refinement Target Model-map cross correlation
Overall B Value ?
Fitting Procedure ?
Details Initial local fitting was done using UCSF Chimera. Multiple rounds of automated (Phenix) and manual (Coot) model building were performed. The model was validated in Molprobity(part of Phenix package). Model-map cross correlation score as well as EMRinger score were obtained in Phenix. RMSD values for C-alphas were calculated in UCSF Chimera.
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 45
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) ?
Maximum Defocus (nm) ?
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.7
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification 130000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION EPU ?
CTF CORRECTION CTFFIND 4
CTF CORRECTION RELION ?
MODEL FITTING UCSF Chimera ?
MODEL REFINEMENT PHENIX ?
MODEL REFINEMENT Coot ?
INITIAL EULER ASSIGNMENT RELION ?
FINAL EULER ASSIGNMENT RELION ?
RECONSTRUCTION RELION ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?