ELECTRON MICROSCOPY

Sample

BG505 SOSIP trimer reconstructed from a designed tetrahedral nanoparticle BG505 SOSIP-T33_dn2

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details Lauryl maltose neopentyl glycol (LMNG) at a final concentration of 0.005 mM was added to the nanoparticle sample (4.0 mg/mL) and 3 uL was immediately loaded onto plasma-cleaned Quantifoil R 2/1 holey carbon copper grid (Cu, 400-mesh, Quantifoil Micro Tools GmbH).
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 52939
Reported Resolution (Å) 4.5
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 ?
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 50.0
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TALOS ARCTICA
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 ?
Nominal Magnification 36000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 200
Imaging Details ?
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION Leginon ?
CTF CORRECTION Gctf ?
MODEL FITTING UCSF Chimera ?
INITIAL EULER ASSIGNMENT RELION 3.0
FINAL EULER ASSIGNMENT RELION 3.0
CLASSIFICATION RELION 3.0
RECONSTRUCTION RELION 3.0
MODEL REFINEMENT Rosetta ?
MODEL REFINEMENT Coot ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING ONLY ?