ELECTRON MICROSCOPY

Sample

Mature Sulfolobus Turreted Icosahedral Virus

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE
Sample Vitrification Details Vitrification carried out at room temperature using liquid ethane and a homemade plunger
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 8903
Reported Resolution (Å) 4.5
Resolution Method FSC 0.143 CUT-OFF
Other Details The final reconstruction was sharpened with a negative temperature factor of 400A2 (Single particle--Applied symmetry: I) Resolution method was FSC at 0.143 cut-off. The reported resolution is for the entire reconstruction. The resolution of the coat subunit region (B345) is estimated to 3.9 A using the same criterion.
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space RECIPROCAL
Refinement Protocol FLEXIBLE FIT
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details REFINEMENT PROTOCOL--positional (xyz) minimization and isotropic B factor refinement DETAILS--Real space refinement was also carried out using Coot.
Data Acquisition
Detector Type FEI FALCON I (4k x 4k)
Electron Dose (electrons/Å2) 18
Imaging Experiment
Date of Experiment 2011-03-30
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 800
Maximum Defocus (nm) 2500
Minimum Tilt Angle (degrees) 0
Maximum Tilt Angle (degrees) 0
Nominal CS 2.7
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification ?
Calibrated Magnification 102189
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details Nanoprobe mode was used.
Imaging Experiment
Task Software Package Version
MODEL FITTING CNS ?
RECONSTRUCTION FREALIGN ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. Each particle