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Updated: Oct 24, 2025

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User-friendly, High-throughput, and Fully Automated Data Acquisition Software for Single-particle Cryo-electron

Anil Kumar1, Surekha P1, Sahil Gulati2

  • 1Molecular Biophysics Unit, Indian Institute of Science.

Journal of Visualized Experiments : Jove
|August 16, 2021
PubMed
Summary

A new automated software pipeline enables high-throughput, precise data collection for single-particle cryo-electron microscopy (cryo-EM). This advancement achieved atomic-resolution structures of the SARS-CoV-2 spike protein, revealing its conformational dynamics.

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Area of Science:

  • Structural Biology
  • Biophysics
  • Microscopy

Background:

  • Single-particle cryo-electron microscopy (cryo-EM) has advanced significantly, enabling high-resolution macromolecular structure determination.
  • Current cryo-EM workflows require optimization for high-throughput automated data acquisition.
  • Automated data collection software is crucial for efficient single-particle analysis.

Purpose of the Study:

  • To present a fully automated image acquisition pipeline for vitrified biomolecules using cryo-EM.
  • To demonstrate a software package capable of precise, automated cryo-EM data collection with controlled microscopic parameters.
  • To showcase the application of this automated pipeline for structural studies of the SARS-CoV-2 spike protein.

Main Methods:

  • Development and application of a fully automated cryo-EM data acquisition pipeline.
  • Utilized a 200 keV cryo-electron microscope with a direct electron detector (DED).
  • Collected approximately 3,000 cryo-EM movie images in a 48-hour session.

Main Results:

  • Achieved atomic-resolution structure determination of the SARS-CoV-2 spike protein.
  • The automated pipeline enabled high-throughput data collection.
  • Identified two major conformations of the spike protein: 1-RBD up (open) and all RBD down (closed).

Conclusions:

  • The presented software package facilitates fully automated and precise cryo-EM data acquisition.
  • This automated approach accelerates structural studies of important biomolecules like the SARS-CoV-2 spike protein.
  • The study provides insights into the conformational flexibility of the SARS-CoV-2 spike protein.