9CNV

ELECTRON MICROSCOPY

Sample

HIV-2 capsid protein assembled into a lattice via liposome templating and then bound with CPSF6 peptide.

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details Grids were dual-side blotted with blot force 0 for 5.5 sec before plunge freezing in liquid ethane.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 2537344
Reported Resolution (Å) 3.16
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol OTHER
Refinement Target Cross-correlation coefficient
Overall B Value ?
Fitting Procedure ?
Details The HIV-2 CA pentamer chain derived from micelle-templated icosahedra described in this publication was used as an initial model for fitting. Flexible fitting was used to move the CTD into its proper location. Backbone tracing was used to model the CPSF6 peptide.
Data Acquisition
Detector Type GATAN K3 (6k x 4k)
Electron Dose (electrons/Å2) 50
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 800
Maximum Defocus (nm) 2000
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 81000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cryoSPARC ?
IMAGE ACQUISITION EPU ?
CTF CORRECTION cryoSPARC ?
MODEL FITTING Coot ?
MODEL REFINEMENT Coot ?
INITIAL EULER ASSIGNMENT cryoSPARC ?
FINAL EULER ASSIGNMENT cryoSPARC ?
CLASSIFICATION cryoSPARC ?
RECONSTRUCTION cryoSPARC ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?