ELECTRON MICROSCOPY

Sample

Helical reconstruction of influenza A virus M1 protein in complex with nucleic acid

Specimen Preperation
Sample Aggregation State HELICAL ARRAY
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details sample was applied 3 times each with 30s adsorption time
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles 17984
Reported Resolution (Å) 3.8
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type HELICAL
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol AB INITIO MODEL
Refinement Target correlation coefficient
Overall B Value 37.9
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 47.1
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1000
Maximum Defocus (nm) 3000
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 SPRING 0.86
IMAGE ACQUISITION SerialEM 3.7
CTF CORRECTION CTFFIND 4
MODEL FITTING Coot 0.9
MODEL REFINEMENT PHENIX 1.18.2
INITIAL EULER ASSIGNMENT RELION 3.08
FINAL EULER ASSIGNMENT RELION 3.08
CLASSIFICATION RELION 3.08
RECONSTRUCTION RELION 3.08
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?