ELECTRON MICROSCOPY

Sample

Nodavirus RNA replication proto-crown, detergent-solubliized C12 multimer

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 11093
Reported Resolution (Å) 3.2
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
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 The final model includes 24 chains representing 12 protein A polypeptides. Chains A-L represent the N-terminal floor segment built into the high-resolution EM density. Chains M-X represent a mainchain trace of the polymerase segment rigid body fit into the map and are included to give a more complete picture of the molecule. The polymerase mainchain trace was refined from an Alphafold prediction into a map obtained by symmetry expansion with subtraction. The polymerase map is uploaded as a separate entry. The two segments have separate chain IDs as it is unclear from the density which polymerase connects to which floor segment.
Data Acquisition
Detector Type FEI FALCON III (4k x 4k)
Electron Dose (electrons/Å2) 100
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 500
Maximum Defocus (nm) 2500
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.7
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification ?
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cisTEM 2.0
IMAGE ACQUISITION SerialEM 3.8
CTF CORRECTION cisTEM 2.0
MODEL FITTING UCSF ChimeraX 1.3
MODEL FITTING Coot 0.9.8.1
MODEL FITTING ISOLDE 1.3
INITIAL EULER ASSIGNMENT cisTEM 2.0
FINAL EULER ASSIGNMENT cisTEM 2.0
CLASSIFICATION cisTEM 2.0
RECONSTRUCTION cisTEM 2.0
MODEL REFINEMENT PHENIX 1.20.1
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?