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Cryo-EM structure of 1059 SOSIP trimer purified via Galanthus nivalis lectin chromatography
Specimen Preparation
Sample Aggregation State
PARTICLE
Vitrification Instrument
LEICA EM GP
Cryogen Name
ETHANE
Sample Vitrification Details
Leica EM GP2
3D Reconstruction
Reconstruction Method
SINGLE PARTICLE
Number of Particles
737588
Reported Resolution (Å)
3.6
Resolution Method
FSC 0.5 CUT-OFF
Other Details
Refinement Type
Symmetry Type
POINT
Map-Model Fitting and Refinement
Id
1 (7LX2)
Refinement Space
Refinement Protocol
FLEXIBLE FIT
Refinement Target
Overall B Value
51.14
Fitting Procedure
Details
Data Acquisition
Detector Type
GATAN K3 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å**2)
59.1
Imaging Experiment
1
Date of Experiment
Temperature (Kelvin)
Microscope Model
FEI TITAN KRIOS
Minimum Defocus (nm)
1000
Maximum Defocus (nm)
3000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode
BRIGHT FIELD
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
Source
FIELD EMISSION GUN
Acceleration Voltage (kV)
300
Imaging Details
EM Software
Task
Software Package
Version
PARTICLE SELECTION
cryoSPARC
4.01
CTF CORRECTION
cryoSPARC
4.01
CLASSIFICATION
cryoSPARC
4.01
Image Processing
CTF Correction Type
CTF Correction Details
Number of Particles Selected
Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION
CryoSPARCv4.01 Patch motion correction and CTF estimation jobs
7260519
In the first round of particle selection, particles were picked with a box size of 280 angstroms using the Blob picker with a circular blob having a maximum diameter of 240 angstroms and these particles were subjected to multiple rounds of 2D classification.