ELECTRON MICROSCOPY

Sample

Structure of TcdA1 in pore state, determined in lipid nanodiscs

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument GATAN CRYOPLUNGE 3
Cryogen Name ETHANE
Sample Vitrification Details ?
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 13000
Reported Resolution (Å) 3.46
Resolution Method FSC 0.143 CUT-OFF
Other Details The density was filtered to its local resolution using localfilt (SPARX) and Remap. Although the density map has an average resolution of 3.46 A, the present rough model was obtained by flexible fitting within local densities of <9 A resolution.
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space ?
Refinement Protocol FLEXIBLE FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details Pseudoatomic model was obtained by flexible fitting after initial rigid body fitting of individual domains in Chimera.
Data Acquisition
Detector Type FEI FALCON II (4k x 4k)
Electron Dose (electrons/Å2) 15.4
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 ?
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification 59000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details Cs corrected microscope
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION EPU ?
CTF CORRECTION CTFFIND 4
MODEL FITTING iMODFIT ?
MODEL FITTING DireX ?
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 ?