ELECTRON MICROSCOPY

Sample

Poliovirus 1 Mahoney 135S particle

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE
Sample Vitrification Details Blotted manually in ambient atmosphere before plunging into ethane cooled by liquid nitrogen.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 117330
Reported Resolution (Å) 5.5
Resolution Method FSC 0.143 CUT-OFF
Other Details Single particle details: The particles were selected using an automatic selection program (Single particle--Applied symmetry: I)
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space RECIPROCAL
Refinement Protocol RIGID BODY FIT
Refinement Target mean amplitude-weighted cosine of the phase difference
Overall B Value ?
Fitting Procedure ?
Details METHOD--rigid body REFINEMENT PROTOCOL--rigid body DETAILS--Most of the model was docked, with specific areas of discrepancy fitted. The fitting was rigid body with flexible fitting or deletion of selected polypeptide segments. Rigid bodies for VP1, VP2, VP3, and the VP3 beta tube were defined to include beta barrels and non-covalently attached polypeptides. Each rigid body was repeatedly fitted manually and then refined. Disordered polypeptide segments were removed. Several rearranged segments were included as approximate backbone traces and refined.
Data Acquisition
Detector Type TVIPS TEMCAM-F415 (4k x 4k)
Electron Dose (electrons/Å2) 15
Imaging Experiment
Date of Experiment 2011-02-28
Temprature (Kelvin)
Microscope Model FEI TECNAI F20
Minimum Defocus (nm) 980
Maximum Defocus (nm) 2000
Minimum Tilt Angle (degrees) 0
Maximum Tilt Angle (degrees) 0
Nominal CS 2
Imaging Mode BRIGHT FIELD
Specimen Holder Model GATAN LIQUID NITROGEN
Nominal Magnification 62000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 200
Imaging Details ?
Imaging Experiment
Task Software Package Version
MODEL FITTING Coot ?
MODEL FITTING REFMAC ?
RECONSTRUCTION FREALIGN ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
. Each micrograph